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// Copyright (c) 2014-2017, The Monero Project
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modification, are
// permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this list of
// conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice, this list
// of conditions and the following disclaimer in the documentation and/or other
// materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its contributors may be
// used to endorse or promote products derived from this software without specific
// prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Parts of this file are originally copyright (c) 2012-2013 The Cryptonote developers
#include <stdint.h>
#include "crypto-ops.h"
/* sqrt(x) is such an integer y that 0 <= y <= p - 1, y % 2 = 0, and y^2 = x (mod p). */
/* d = -121665 / 121666 */
const fe fe_d = {-10913610, 13857413, -15372611, 6949391, 114729, -8787816, -6275908, -3247719, -18696448, -12055116}; /* d */
const fe fe_sqrtm1 = {-32595792, -7943725, 9377950, 3500415, 12389472, -272473, -25146209, -2005654, 326686, 11406482}; /* sqrt(-1) */
const fe fe_d2 = {-21827239, -5839606, -30745221, 13898782, 229458, 15978800, -12551817, -6495438, 29715968, 9444199}; /* 2 * d */
/* base[i][j] = (j+1)*256^i*B */
const ge_precomp ge_base[32][8] = {
{
{{25967493, -14356035, 29566456, 3660896, -12694345, 4014787, 27544626, -11754271, -6079156, 2047605},
{-12545711, 934262, -2722910, 3049990, -727428, 9406986, 12720692, 5043384, 19500929, -15469378},
{-8738181, 4489570, 9688441, -14785194, 10184609, -12363380, 29287919, 11864899, -24514362, -4438546}},
{{-12815894, -12976347, -21581243, 11784320, -25355658, -2750717, -11717903, -3814571, -358445, -10211303},
{-21703237, 6903825, 27185491, 6451973, -29577724, -9554005, -15616551, 11189268, -26829678, -5319081},
{26966642, 11152617, 32442495, 15396054, 14353839, -12752335, -3128826, -9541118, -15472047, -4166697}},
{{15636291, -9688557, 24204773, -7912398, 616977, -16685262, 27787600, -14772189, 28944400, -1550024},
{16568933, 4717097, -11556148, -1102322, 15682896, -11807043, 16354577, -11775962, 7689662, 11199574},
{30464156, -5976125, -11779434, -15670865, 23220365, 15915852, 7512774, 10017326, -17749093, -9920357}},
{{-17036878, 13921892, 10945806, -6033431, 27105052, -16084379, -28926210, 15006023, 3284568, -6276540},
{23599295, -8306047, -11193664, -7687416, 13236774, 10506355, 7464579, 9656445, 13059162, 10374397},
{7798556, 16710257, 3033922, 2874086, 28997861, 2835604, 32406664, -3839045, -641708, -101325}},
{{10861363, 11473154, 27284546, 1981175, -30064349, 12577861, 32867885, 14515107, -15438304, 10819380},
{4708026, 6336745, 20377586, 9066809, -11272109, 6594696, -25653668, 12483688, -12668491, 5581306},
{19563160, 16186464, -29386857, 4097519, 10237984, -4348115, 28542350, 13850243, -23678021, -15815942}},
{{-15371964, -12862754, 32573250, 4720197, -26436522, 5875511, -19188627, -15224819, -9818940, -12085777},
{-8549212, 109983, 15149363, 2178705, 22900618, 4543417, 3044240, -15689887, 1762328, 14866737},
{-18199695, -15951423, -10473290, 1707278, -17185920, 3916101, -28236412, 3959421, 27914454, 4383652}},
{{5153746, 9909285, 1723747, -2777874, 30523605, 5516873, 19480852, 5230134, -23952439, -15175766},
{-30269007, -3463509, 7665486, 10083793, 28475525, 1649722, 20654025, 16520125, 30598449, 7715701},
{28881845, 14381568, 9657904, 3680757, -20181635, 7843316, -31400660, 1370708, 29794553, -1409300}},
{{14499471, -2729599, -33191113, -4254652, 28494862, 14271267, 30290735, 10876454, -33154098, 2381726},
{-7195431, -2655363, -14730155, 462251, -27724326, 3941372, -6236617, 3696005, -32300832, 15351955},
{27431194, 8222322, 16448760, -3907995, -18707002, 11938355, -32961401, -2970515, 29551813, 10109425}}
}, {
{{-13657040, -13155431, -31283750, 11777098, 21447386, 6519384, -2378284, -1627556, 10092783, -4764171},
{27939166, 14210322, 4677035, 16277044, -22964462, -12398139, -32508754, 12005538, -17810127, 12803510},
{17228999, -15661624, -1233527, 300140, -1224870, -11714777, 30364213, -9038194, 18016357, 4397660}},
{{-10958843, -7690207, 4776341, -14954238, 27850028, -15602212, -26619106, 14544525, -17477504, 982639},
{29253598, 15796703, -2863982, -9908884, 10057023, 3163536, 7332899, -4120128, -21047696, 9934963},
{5793303, 16271923, -24131614, -10116404, 29188560, 1206517, -14747930, 4559895, -30123922, -10897950}},
{{-27643952, -11493006, 16282657, -11036493, 28414021, -15012264, 24191034, 4541697, -13338309, 5500568},
{12650548, -1497113, 9052871, 11355358, -17680037, -8400164, -17430592, 12264343, 10874051, 13524335},
{25556948, -3045990, 714651, 2510400, 23394682, -10415330, 33119038, 5080568, -22528059, 5376628}},
{{-26088264, -4011052, -17013699, -3537628, -6726793, 1920897, -22321305, -9447443, 4535768, 1569007},
{-2255422, 14606630, -21692440, -8039818, 28430649, 8775819, -30494562, 3044290, 31848280, 12543772},
{-22028579, 2943893, -31857513, 6777306, 13784462, -4292203, -27377195, -2062731, 7718482, 14474653}},
{{2385315, 2454213, -22631320, 46603, -4437935, -15680415, 656965, -7236665, 24316168, -5253567},
{13741529, 10911568, -33233417, -8603737, -20177830, -1033297, 33040651, -13424532, -20729456, 8321686},
{21060490, -2212744, 15712757, -4336099, 1639040, 10656336, 23845965, -11874838, -9984458, 608372}},
{{-13672732, -15087586, -10889693, -7557059, -6036909, 11305547, 1123968, -6780577, 27229399, 23887},
{-23244140, -294205, -11744728, 14712571, -29465699, -2029617, 12797024, -6440308, -1633405, 16678954},
{-29500620, 4770662, -16054387, 14001338, 7830047, 9564805, -1508144, -4795045, -17169265, 4904953}},
{{24059557, 14617003, 19037157, -15039908, 19766093, -14906429, 5169211, 16191880, 2128236, -4326833},
{-16981152, 4124966, -8540610, -10653797, 30336522, -14105247, -29806336, 916033, -6882542, -2986532},
{-22630907, 12419372, -7134229, -7473371, -16478904, 16739175, 285431, 2763829, 15736322, 4143876}},
{{2379352, 11839345, -4110402, -5988665, 11274298, 794957, 212801, -14594663, 23527084, -16458268},
{33431127, -11130478, -17838966, -15626900, 8909499, 8376530, -32625340, 4087881, -15188911, -14416214},
{1767683, 7197987, -13205226, -2022635, -13091350, 448826, 5799055, 4357868, -4774191, -16323038}}
}, {
{{6721966, 13833823, -23523388, -1551314, 26354293, -11863321, 23365147, -3949732, 7390890, 2759800},
{4409041, 2052381, 23373853, 10530217, 7676779, -12885954, 21302353, -4264057, 1244380, -12919645},
{-4421239, 7169619, 4982368, -2957590, 30256825, -2777540, 14086413, 9208236, 15886429, 16489664}},
{{1996075, 10375649, 14346367, 13311202, -6874135, -16438411, -13693198, 398369, -30606455, -712933},
{-25307465, 9795880, -2777414, 14878809, -33531835, 14780363, 13348553, 12076947, -30836462, 5113182},
{-17770784, 11797796, 31950843, 13929123, -25888302, 12288344, -30341101, -7336386, 13847711, 5387222}},
{{-18582163, -3416217, 17824843, -2340966, 22744343, -10442611, 8763061, 3617786, -19600662, 10370991},
{20246567, -14369378, 22358229, -543712, 18507283, -10413996, 14554437, -8746092, 32232924, 16763880},
{9648505, 10094563, 26416693, 14745928, -30374318, -6472621, 11094161, 15689506, 3140038, -16510092}},
{{-16160072, 5472695, 31895588, 4744994, 8823515, 10365685, -27224800, 9448613, -28774454, 366295},
{19153450, 11523972, -11096490, -6503142, -24647631, 5420647, 28344573, 8041113, 719605, 11671788},
{8678025, 2694440, -6808014, 2517372, 4964326, 11152271, -15432916, -15266516, 27000813, -10195553}},
{{-15157904, 7134312, 8639287, -2814877, -7235688, 10421742, 564065, 5336097, 6750977, -14521026},
{11836410, -3979488, 26297894, 16080799, 23455045, 15735944, 1695823, -8819122, 8169720, 16220347},
{-18115838, 8653647, 17578566, -6092619, -8025777, -16012763, -11144307, -2627664, -5990708, -14166033}},
{{-23308498, -10968312, 15213228, -10081214, -30853605, -11050004, 27884329, 2847284, 2655861, 1738395},
{-27537433, -14253021, -25336301, -8002780, -9370762, 8129821, 21651608, -3239336, -19087449, -11005278},
{1533110, 3437855, 23735889, 459276, 29970501, 11335377, 26030092, 5821408, 10478196, 8544890}},
{{32173121, -16129311, 24896207, 3921497, 22579056, -3410854, 19270449, 12217473, 17789017, -3395995},
{-30552961, -2228401, -15578829, -10147201, 13243889, 517024, 15479401, -3853233, 30460520, 1052596},
{-11614875, 13323618, 32618793, 8175907, -15230173, 12596687, 27491595, -4612359, 3179268, -9478891}},
{{31947069, -14366651, -4640583, -15339921, -15125977, -6039709, -14756777, -16411740, 19072640, -9511060},
{11685058, 11822410, 3158003, -13952594, 33402194, -4165066, 5977896, -5215017, 473099, 5040608},
{-20290863, 8198642, -27410132, 11602123, 1290375, -2799760, 28326862, 1721092, -19558642, -3131606}}
}, {
{{7881532, 10687937, 7578723, 7738378, -18951012, -2553952, 21820786, 8076149, -27868496, 11538389},
{-19935666, 3899861, 18283497, -6801568, -15728660, -11249211, 8754525, 7446702, -5676054, 5797016},
{-11295600, -3793569, -15782110, -7964573, 12708869, -8456199, 2014099, -9050574, -2369172, -5877341}},
{{-22472376, -11568741, -27682020, 1146375, 18956691, 16640559, 1192730, -3714199, 15123619, 10811505},
{14352098, -3419715, -18942044, 10822655, 32750596, 4699007, -70363, 15776356, -28886779, -11974553},
{-28241164, -8072475, -4978962, -5315317, 29416931, 1847569, -20654173, -16484855, 4714547, -9600655}},
{{15200332, 8368572, 19679101, 15970074, -31872674, 1959451, 24611599, -4543832, -11745876, 12340220},
{12876937, -10480056, 33134381, 6590940, -6307776, 14872440, 9613953, 8241152, 15370987, 9608631},
{-4143277, -12014408, 8446281, -391603, 4407738, 13629032, -7724868, 15866074, -28210621, -8814099}},
{{26660628, -15677655, 8393734, 358047, -7401291, 992988, -23904233, 858697, 20571223, 8420556},
{14620715, 13067227, -15447274, 8264467, 14106269, 15080814, 33531827, 12516406, -21574435, -12476749},
{236881, 10476226, 57258, -14677024, 6472998, 2466984, 17258519, 7256740, 8791136, 15069930}},
{{1276410, -9371918, 22949635, -16322807, -23493039, -5702186, 14711875, 4874229, -30663140, -2331391},
{5855666, 4990204, -13711848, 7294284, -7804282, 1924647, -1423175, -7912378, -33069337, 9234253},
{20590503, -9018988, 31529744, -7352666, -2706834, 10650548, 31559055, -11609587, 18979186, 13396066}},
{{24474287, 4968103, 22267082, 4407354, 24063882, -8325180, -18816887, 13594782, 33514650, 7021958},
{-11566906, -6565505, -21365085, 15928892, -26158305, 4315421, -25948728, -3916677, -21480480, 12868082},
{-28635013, 13504661, 19988037, -2132761, 21078225, 6443208, -21446107, 2244500, -12455797, -8089383}},
{{-30595528, 13793479, -5852820, 319136, -25723172, -6263899, 33086546, 8957937, -15233648, 5540521},
{-11630176, -11503902, -8119500, -7643073, 2620056, 1022908, -23710744, -1568984, -16128528, -14962807},
{23152971, 775386, 27395463, 14006635, -9701118, 4649512, 1689819, 892185, -11513277, -15205948}},
{{9770129, 9586738, 26496094, 4324120, 1556511, -3550024, 27453819, 4763127, -19179614, 5867134},
{-32765025, 1927590, 31726409, -4753295, 23962434, -16019500, 27846559, 5931263, -29749703, -16108455},
{27461885, -2977536, 22380810, 1815854, -23033753, -3031938, 7283490, -15148073, -19526700, 7734629}}
}, {
{{-8010264, -9590817, -11120403, 6196038, 29344158, -13430885, 7585295, -3176626, 18549497, 15302069},
{-32658337, -6171222, -7672793, -11051681, 6258878, 13504381, 10458790, -6418461, -8872242, 8424746},
{24687205, 8613276, -30667046, -3233545, 1863892, -1830544, 19206234, 7134917, -11284482, -828919}},
{{11334899, -9218022, 8025293, 12707519, 17523892, -10476071, 10243738, -14685461, -5066034, 16498837},
{8911542, 6887158, -9584260, -6958590, 11145641, -9543680, 17303925, -14124238, 6536641, 10543906},
{-28946384, 15479763, -17466835, 568876, -1497683, 11223454, -2669190, -16625574, -27235709, 8876771}},
{{-25742899, -12566864, -15649966, -846607, -33026686, -796288, -33481822, 15824474, -604426, -9039817},
{10330056, 70051, 7957388, -9002667, 9764902, 15609756, 27698697, -4890037, 1657394, 3084098},
{10477963, -7470260, 12119566, -13250805, 29016247, -5365589, 31280319, 14396151, -30233575, 15272409}},
{{-12288309, 3169463, 28813183, 16658753, 25116432, -5630466, -25173957, -12636138, -25014757, 1950504},
{-26180358, 9489187, 11053416, -14746161, -31053720, 5825630, -8384306, -8767532, 15341279, 8373727},
{28685821, 7759505, -14378516, -12002860, -31971820, 4079242, 298136, -10232602, -2878207, 15190420}},
{{-32932876, 13806336, -14337485, -15794431, -24004620, 10940928, 8669718, 2742393, -26033313, -6875003},
{-1580388, -11729417, -25979658, -11445023, -17411874, -10912854, 9291594, -16247779, -12154742, 6048605},
{-30305315, 14843444, 1539301, 11864366, 20201677, 1900163, 13934231, 5128323, 11213262, 9168384}},
{{-26280513, 11007847, 19408960, -940758, -18592965, -4328580, -5088060, -11105150, 20470157, -16398701},
{-23136053, 9282192, 14855179, -15390078, -7362815, -14408560, -22783952, 14461608, 14042978, 5230683},
{29969567, -2741594, -16711867, -8552442, 9175486, -2468974, 21556951, 3506042, -5933891, -12449708}},
{{-3144746, 8744661, 19704003, 4581278, -20430686, 6830683, -21284170, 8971513, -28539189, 15326563},
{-19464629, 10110288, -17262528, -3503892, -23500387, 1355669, -15523050, 15300988, -20514118, 9168260},
{-5353335, 4488613, -23803248, 16314347, 7780487, -15638939, -28948358, 9601605, 33087103, -9011387}},
{{-19443170, -15512900, -20797467, -12445323, -29824447, 10229461, -27444329, -15000531, -5996870, 15664672},
{23294591, -16632613, -22650781, -8470978, 27844204, 11461195, 13099750, -2460356, 18151676, 13417686},
{-24722913, -4176517, -31150679, 5988919, -26858785, 6685065, 1661597, -12551441, 15271676, -15452665}}
}, {
{{11433042, -13228665, 8239631, -5279517, -1985436, -725718, -18698764, 2167544, -6921301, -13440182},
{-31436171, 15575146, 30436815, 12192228, -22463353, 9395379, -9917708, -8638997, 12215110, 12028277},
{14098400, 6555944, 23007258, 5757252, -15427832, -12950502, 30123440, 4617780, -16900089, -655628}},
{{-4026201, -15240835, 11893168, 13718664, -14809462, 1847385, -15819999, 10154009, 23973261, -12684474},
{-26531820, -3695990, -1908898, 2534301, -31870557, -16550355, 18341390, -11419951, 32013174, -10103539},
{-25479301, 10876443, -11771086, -14625140, -12369567, 1838104, 21911214, 6354752, 4425632, -837822}},
{{-10433389, -14612966, 22229858, -3091047, -13191166, 776729, -17415375, -12020462, 4725005, 14044970},
{19268650, -7304421, 1555349, 8692754, -21474059, -9910664, 6347390, -1411784, -19522291, -16109756},
{-24864089, 12986008, -10898878, -5558584, -11312371, -148526, 19541418, 8180106, 9282262, 10282508}},
{{-26205082, 4428547, -8661196, -13194263, 4098402, -14165257, 15522535, 8372215, 5542595, -10702683},
{-10562541, 14895633, 26814552, -16673850, -17480754, -2489360, -2781891, 6993761, -18093885, 10114655},
{-20107055, -929418, 31422704, 10427861, -7110749, 6150669, -29091755, -11529146, 25953725, -106158}},
{{-4234397, -8039292, -9119125, 3046000, 2101609, -12607294, 19390020, 6094296, -3315279, 12831125},
{-15998678, 7578152, 5310217, 14408357, -33548620, -224739, 31575954, 6326196, 7381791, -2421839},
{-20902779, 3296811, 24736065, -16328389, 18374254, 7318640, 6295303, 8082724, -15362489, 12339664}},
{{27724736, 2291157, 6088201, -14184798, 1792727, 5857634, 13848414, 15768922, 25091167, 14856294},
{-18866652, 8331043, 24373479, 8541013, -701998, -9269457, 12927300, -12695493, -22182473, -9012899},
{-11423429, -5421590, 11632845, 3405020, 30536730, -11674039, -27260765, 13866390, 30146206, 9142070}},
{{3924129, -15307516, -13817122, -10054960, 12291820, -668366, -27702774, 9326384, -8237858, 4171294},
{-15921940, 16037937, 6713787, 16606682, -21612135, 2790944, 26396185, 3731949, 345228, -5462949},
{-21327538, 13448259, 25284571, 1143661, 20614966, -8849387, 2031539, -12391231, -16253183, -13582083}},
{{31016211, -16722429, 26371392, -14451233, -5027349, 14854137, 17477601, 3842657, 28012650, -16405420},
{-5075835, 9368966, -8562079, -4600902, -15249953, 6970560, -9189873, 16292057, -8867157, 3507940},
{29439664, 3537914, 23333589, 6997794, -17555561, -11018068, -15209202, -15051267, -9164929, 6580396}}
}, {
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{-25144690, 11425020, 28423002, -11020557, -6144921, -15826224, 9142795, -2391602, -6432418, -1644817}},
{{-23104652, 6253476, 16964147, -3768872, -25113972, -12296437, -27457225, -16344658, 6335692, 7249989},
{-30333227, 13979675, 7503222, -12368314, -11956721, -4621693, -30272269, 2682242, 25993170, -12478523},
{4364628, 5930691, 32304656, -10044554, -8054781, 15091131, 22857016, -10598955, 31820368, 15075278}},
{{31879134, -8918693, 17258761, 90626, -8041836, -4917709, 24162788, -9650886, -17970238, 12833045},
{19073683, 14851414, -24403169, -11860168, 7625278, 11091125, -19619190, 2074449, -9413939, 14905377},
{24483667, -11935567, -2518866, -11547418, -1553130, 15355506, -25282080, 9253129, 27628530, -7555480}},
{{17597607, 8340603, 19355617, 552187, 26198470, -3176583, 4593324, -9157582, -14110875, 15297016},
{510886, 14337390, -31785257, 16638632, 6328095, 2713355, -20217417, -11864220, 8683221, 2921426},
{18606791, 11874196, 27155355, -5281482, -24031742, 6265446, -25178240, -1278924, 4674690, 13890525}},
{{13609624, 13069022, -27372361, -13055908, 24360586, 9592974, 14977157, 9835105, 4389687, 288396},
{9922506, -519394, 13613107, 5883594, -18758345, -434263, -12304062, 8317628, 23388070, 16052080},
{12720016, 11937594, -31970060, -5028689, 26900120, 8561328, -20155687, -11632979, -14754271, -10812892}},
{{15961858, 14150409, 26716931, -665832, -22794328, 13603569, 11829573, 7467844, -28822128, 929275},
{11038231, -11582396, -27310482, -7316562, -10498527, -16307831, -23479533, -9371869, -21393143, 2465074},
{20017163, -4323226, 27915242, 1529148, 12396362, 15675764, 13817261, -9658066, 2463391, -4622140}},
{{-16358878, -12663911, -12065183, 4996454, -1256422, 1073572, 9583558, 12851107, 4003896, 12673717},
{-1731589, -15155870, -3262930, 16143082, 19294135, 13385325, 14741514, -9103726, 7903886, 2348101},
{24536016, -16515207, 12715592, -3862155, 1511293, 10047386, -3842346, -7129159, -28377538, 10048127}}
}, {
{{-12622226, -6204820, 30718825, 2591312, -10617028, 12192840, 18873298, -7297090, -32297756, 15221632},
{-26478122, -11103864, 11546244, -1852483, 9180880, 7656409, -21343950, 2095755, 29769758, 6593415},
{-31994208, -2907461, 4176912, 3264766, 12538965, -868111, 26312345, -6118678, 30958054, 8292160}},
{{31429822, -13959116, 29173532, 15632448, 12174511, -2760094, 32808831, 3977186, 26143136, -3148876},
{22648901, 1402143, -22799984, 13746059, 7936347, 365344, -8668633, -1674433, -3758243, -2304625},
{-15491917, 8012313, -2514730, -12702462, -23965846, -10254029, -1612713, -1535569, -16664475, 8194478}},
{{27338066, -7507420, -7414224, 10140405, -19026427, -6589889, 27277191, 8855376, 28572286, 3005164},
{26287124, 4821776, 25476601, -4145903, -3764513, -15788984, -18008582, 1182479, -26094821, -13079595},
{-7171154, 3178080, 23970071, 6201893, -17195577, -4489192, -21876275, -13982627, 32208683, -1198248}},
{{-16657702, 2817643, -10286362, 14811298, 6024667, 13349505, -27315504, -10497842, -27672585, -11539858},
{15941029, -9405932, -21367050, 8062055, 31876073, -238629, -15278393, -1444429, 15397331, -4130193},
{8934485, -13485467, -23286397, -13423241, -32446090, 14047986, 31170398, -1441021, -27505566, 15087184}},
{{-18357243, -2156491, 24524913, -16677868, 15520427, -6360776, -15502406, 11461896, 16788528, -5868942},
{-1947386, 16013773, 21750665, 3714552, -17401782, -16055433, -3770287, -10323320, 31322514, -11615635},
{21426655, -5650218, -13648287, -5347537, -28812189, -4920970, -18275391, -14621414, 13040862, -12112948}},
{{11293895, 12478086, -27136401, 15083750, -29307421, 14748872, 14555558, -13417103, 1613711, 4896935},
{-25894883, 15323294, -8489791, -8057900, 25967126, -13425460, 2825960, -4897045, -23971776, -11267415},
{-15924766, -5229880, -17443532, 6410664, 3622847, 10243618, 20615400, 12405433, -23753030, -8436416}},
{{-7091295, 12556208, -20191352, 9025187, -17072479, 4333801, 4378436, 2432030, 23097949, -566018},
{4565804, -16025654, 20084412, -7842817, 1724999, 189254, 24767264, 10103221, -18512313, 2424778},
{366633, -11976806, 8173090, -6890119, 30788634, 5745705, -7168678, 1344109, -3642553, 12412659}},
{{-24001791, 7690286, 14929416, -168257, -32210835, -13412986, 24162697, -15326504, -3141501, 11179385},
{18289522, -14724954, 8056945, 16430056, -21729724, 7842514, -6001441, -1486897, -18684645, -11443503},
{476239, 6601091, -6152790, -9723375, 17503545, -4863900, 27672959, 13403813, 11052904, 5219329}}
}, {
{{20678546, -8375738, -32671898, 8849123, -5009758, 14574752, 31186971, -3973730, 9014762, -8579056},
{-13644050, -10350239, -15962508, 5075808, -1514661, -11534600, -33102500, 9160280, 8473550, -3256838},
{24900749, 14435722, 17209120, -15292541, -22592275, 9878983, -7689309, -16335821, -24568481, 11788948}},
{{-3118155, -11395194, -13802089, 14797441, 9652448, -6845904, -20037437, 10410733, -24568470, -1458691},
{-15659161, 16736706, -22467150, 10215878, -9097177, 7563911, 11871841, -12505194, -18513325, 8464118},
{-23400612, 8348507, -14585951, -861714, -3950205, -6373419, 14325289, 8628612, 33313881, -8370517}},
{{-20186973, -4967935, 22367356, 5271547, -1097117, -4788838, -24805667, -10236854, -8940735, -5818269},
{-6948785, -1795212, -32625683, -16021179, 32635414, -7374245, 15989197, -12838188, 28358192, -4253904},
{-23561781, -2799059, -32351682, -1661963, -9147719, 10429267, -16637684, 4072016, -5351664, 5596589}},
{{-28236598, -3390048, 12312896, 6213178, 3117142, 16078565, 29266239, 2557221, 1768301, 15373193},
{-7243358, -3246960, -4593467, -7553353, -127927, -912245, -1090902, -4504991, -24660491, 3442910},
{-30210571, 5124043, 14181784, 8197961, 18964734, -11939093, 22597931, 7176455, -18585478, 13365930}},
{{-7877390, -1499958, 8324673, 4690079, 6261860, 890446, 24538107, -8570186, -9689599, -3031667},
{25008904, -10771599, -4305031, -9638010, 16265036, 15721635, 683793, -11823784, 15723479, -15163481},
{-9660625, 12374379, -27006999, -7026148, -7724114, -12314514, 11879682, 5400171, 519526, -1235876}},
{{22258397, -16332233, -7869817, 14613016, -22520255, -2950923, -20353881, 7315967, 16648397, 7605640},
{-8081308, -8464597, -8223311, 9719710, 19259459, -15348212, 23994942, -5281555, -9468848, 4763278},
{-21699244, 9220969, -15730624, 1084137, -25476107, -2852390, 31088447, -7764523, -11356529, 728112}},
{{26047220, -11751471, -6900323, -16521798, 24092068, 9158119, -4273545, -12555558, -29365436, -5498272},
{17510331, -322857, 5854289, 8403524, 17133918, -3112612, -28111007, 12327945, 10750447, 10014012},
{-10312768, 3936952, 9156313, -8897683, 16498692, -994647, -27481051, -666732, 3424691, 7540221}},
{{30322361, -6964110, 11361005, -4143317, 7433304, 4989748, -7071422, -16317219, -9244265, 15258046},
{13054562, -2779497, 19155474, 469045, -12482797, 4566042, 5631406, 2711395, 1062915, -5136345},
{-19240248, -11254599, -29509029, -7499965, -5835763, 13005411, -6066489, 12194497, 32960380, 1459310}}
}, {
{{19852034, 7027924, 23669353, 10020366, 8586503, -6657907, 394197, -6101885, 18638003, -11174937},
{31395534, 15098109, 26581030, 8030562, -16527914, -5007134, 9012486, -7584354, -6643087, -5442636},
{-9192165, -2347377, -1997099, 4529534, 25766844, 607986, -13222, 9677543, -32294889, -6456008}},
{{-2444496, -149937, 29348902, 8186665, 1873760, 12489863, -30934579, -7839692, -7852844, -8138429},
{-15236356, -15433509, 7766470, 746860, 26346930, -10221762, -27333451, 10754588, -9431476, 5203576},
{31834314, 14135496, -770007, 5159118, 20917671, -16768096, -7467973, -7337524, 31809243, 7347066}},
{{-9606723, -11874240, 20414459, 13033986, 13716524, -11691881, 19797970, -12211255, 15192876, -2087490},
{-12663563, -2181719, 1168162, -3804809, 26747877, -14138091, 10609330, 12694420, 33473243, -13382104},
{33184999, 11180355, 15832085, -11385430, -1633671, 225884, 15089336, -11023903, -6135662, 14480053}},
{{31308717, -5619998, 31030840, -1897099, 15674547, -6582883, 5496208, 13685227, 27595050, 8737275},
{-20318852, -15150239, 10933843, -16178022, 8335352, -7546022, -31008351, -12610604, 26498114, 66511},
{22644454, -8761729, -16671776, 4884562, -3105614, -13559366, 30540766, -4286747, -13327787, -7515095}},
{{-28017847, 9834845, 18617207, -2681312, -3401956, -13307506, 8205540, 13585437, -17127465, 15115439},
{23711543, -672915, 31206561, -8362711, 6164647, -9709987, -33535882, -1426096, 8236921, 16492939},
{-23910559, -13515526, -26299483, -4503841, 25005590, -7687270, 19574902, 10071562, 6708380, -6222424}},
{{2101391, -4930054, 19702731, 2367575, -15427167, 1047675, 5301017, 9328700, 29955601, -11678310},
{3096359, 9271816, -21620864, -15521844, -14847996, -7592937, -25892142, -12635595, -9917575, 6216608},
{-32615849, 338663, -25195611, 2510422, -29213566, -13820213, 24822830, -6146567, -26767480, 7525079}},
{{-23066649, -13985623, 16133487, -7896178, -3389565, 778788, -910336, -2782495, -19386633, 11994101},
{21691500, -13624626, -641331, -14367021, 3285881, -3483596, -25064666, 9718258, -7477437, 13381418},
{18445390, -4202236, 14979846, 11622458, -1727110, -3582980, 23111648, -6375247, 28535282, 15779576}},
{{30098053, 3089662, -9234387, 16662135, -21306940, 11308411, -14068454, 12021730, 9955285, -16303356},
{9734894, -14576830, -7473633, -9138735, 2060392, 11313496, -18426029, 9924399, 20194861, 13380996},
{-26378102, -7965207, -22167821, 15789297, -18055342, -6168792, -1984914, 15707771, 26342023, 10146099}}
}, {
{{-26016874, -219943, 21339191, -41388, 19745256, -2878700, -29637280, 2227040, 21612326, -545728},
{-13077387, 1184228, 23562814, -5970442, -20351244, -6348714, 25764461, 12243797, -20856566, 11649658},
{-10031494, 11262626, 27384172, 2271902, 26947504, -15997771, 39944, 6114064, 33514190, 2333242}},
{{-21433588, -12421821, 8119782, 7219913, -21830522, -9016134, -6679750, -12670638, 24350578, -13450001},
{-4116307, -11271533, -23886186, 4843615, -30088339, 690623, -31536088, -10406836, 8317860, 12352766},
{18200138, -14475911, -33087759, -2696619, -23702521, -9102511, -23552096, -2287550, 20712163, 6719373}},
{{26656208, 6075253, -7858556, 1886072, -28344043, 4262326, 11117530, -3763210, 26224235, -3297458},
{-17168938, -14854097, -3395676, -16369877, -19954045, 14050420, 21728352, 9493610, 18620611, -16428628},
{-13323321, 13325349, 11432106, 5964811, 18609221, 6062965, -5269471, -9725556, -30701573, -16479657}},
{{-23860538, -11233159, 26961357, 1640861, -32413112, -16737940, 12248509, -5240639, 13735342, 1934062},
{25089769, 6742589, 17081145, -13406266, 21909293, -16067981, -15136294, -3765346, -21277997, 5473616},
{31883677, -7961101, 1083432, -11572403, 22828471, 13290673, -7125085, 12469656, 29111212, -5451014}},
{{24244947, -15050407, -26262976, 2791540, -14997599, 16666678, 24367466, 6388839, -10295587, 452383},
{-25640782, -3417841, 5217916, 16224624, 19987036, -4082269, -24236251, -5915248, 15766062, 8407814},
{-20406999, 13990231, 15495425, 16395525, 5377168, 15166495, -8917023, -4388953, -8067909, 2276718}},
{{30157918, 12924066, -17712050, 9245753, 19895028, 3368142, -23827587, 5096219, 22740376, -7303417},
{2041139, -14256350, 7783687, 13876377, -25946985, -13352459, 24051124, 13742383, -15637599, 13295222},
{33338237, -8505733, 12532113, 7977527, 9106186, -1715251, -17720195, -4612972, -4451357, -14669444}},
{{-20045281, 5454097, -14346548, 6447146, 28862071, 1883651, -2469266, -4141880, 7770569, 9620597},
{23208068, 7979712, 33071466, 8149229, 1758231, -10834995, 30945528, -1694323, -33502340, -14767970},
{1439958, -16270480, -1079989, -793782, 4625402, 10647766, -5043801, 1220118, 30494170, -11440799}},
{{-5037580, -13028295, -2970559, -3061767, 15640974, -6701666, -26739026, 926050, -1684339, -13333647},
{13908495, -3549272, 30919928, -6273825, -21521863, 7989039, 9021034, 9078865, 3353509, 4033511},
{-29663431, -15113610, 32259991, -344482, 24295849, -12912123, 23161163, 8839127, 27485041, 7356032}}
}, {
{{9661027, 705443, 11980065, -5370154, -1628543, 14661173, -6346142, 2625015, 28431036, -16771834},
{-23839233, -8311415, -25945511, 7480958, -17681669, -8354183, -22545972, 14150565, 15970762, 4099461},
{29262576, 16756590, 26350592, -8793563, 8529671, -11208050, 13617293, -9937143, 11465739, 8317062}},
{{-25493081, -6962928, 32500200, -9419051, -23038724, -2302222, 14898637, 3848455, 20969334, -5157516},
{-20384450, -14347713, -18336405, 13884722, -33039454, 2842114, -21610826, -3649888, 11177095, 14989547},
{-24496721, -11716016, 16959896, 2278463, 12066309, 10137771, 13515641, 2581286, -28487508, 9930240}},
{{-17751622, -2097826, 16544300, -13009300, -15914807, -14949081, 18345767, -13403753, 16291481, -5314038},
{-33229194, 2553288, 32678213, 9875984, 8534129, 6889387, -9676774, 6957617, 4368891, 9788741},
{16660756, 7281060, -10830758, 12911820, 20108584, -8101676, -21722536, -8613148, 16250552, -11111103}},
{{-19765507, 2390526, -16551031, 14161980, 1905286, 6414907, 4689584, 10604807, -30190403, 4782747},
{-1354539, 14736941, -7367442, -13292886, 7710542, -14155590, -9981571, 4383045, 22546403, 437323},
{31665577, -12180464, -16186830, 1491339, -18368625, 3294682, 27343084, 2786261, -30633590, -14097016}},
{{-14467279, -683715, -33374107, 7448552, 19294360, 14334329, -19690631, 2355319, -19284671, -6114373},
{15121312, -15796162, 6377020, -6031361, -10798111, -12957845, 18952177, 15496498, -29380133, 11754228},
{-2637277, -13483075, 8488727, -14303896, 12728761, -1622493, 7141596, 11724556, 22761615, -10134141}},
{{16918416, 11729663, -18083579, 3022987, -31015732, -13339659, -28741185, -12227393, 32851222, 11717399},
{11166634, 7338049, -6722523, 4531520, -29468672, -7302055, 31474879, 3483633, -1193175, -4030831},
{-185635, 9921305, 31456609, -13536438, -12013818, 13348923, 33142652, 6546660, -19985279, -3948376}},
{{-32460596, 11266712, -11197107, -7899103, 31703694, 3855903, -8537131, -12833048, -30772034, -15486313},
{-18006477, 12709068, 3991746, -6479188, -21491523, -10550425, -31135347, -16049879, 10928917, 3011958},
{-6957757, -15594337, 31696059, 334240, 29576716, 14796075, -30831056, -12805180, 18008031, 10258577}},
{{-22448644, 15655569, 7018479, -4410003, -30314266, -1201591, -1853465, 1367120, 25127874, 6671743},
{29701166, -14373934, -10878120, 9279288, -17568, 13127210, 21382910, 11042292, 25838796, 4642684},
{-20430234, 14955537, -24126347, 8124619, -5369288, -5990470, 30468147, -13900640, 18423289, 4177476}}
}
};
const ge_precomp ge_Bi[8] = {
{{25967493, -14356035, 29566456, 3660896, -12694345, 4014787, 27544626, -11754271, -6079156, 2047605},
{-12545711, 934262, -2722910, 3049990, -727428, 9406986, 12720692, 5043384, 19500929, -15469378},
{-8738181, 4489570, 9688441, -14785194, 10184609, -12363380, 29287919, 11864899, -24514362, -4438546}}, {{15636291, -9688557, 24204773, -7912398, 616977, -16685262, 27787600, -14772189, 28944400, -1550024},
{16568933, 4717097, -11556148, -1102322, 15682896, -11807043, 16354577, -11775962, 7689662, 11199574},
{30464156, -5976125, -11779434, -15670865, 23220365, 15915852, 7512774, 10017326, -17749093, -9920357}}, {{10861363, 11473154, 27284546, 1981175, -30064349, 12577861, 32867885, 14515107, -15438304, 10819380},
{4708026, 6336745, 20377586, 9066809, -11272109, 6594696, -25653668, 12483688, -12668491, 5581306},
{19563160, 16186464, -29386857, 4097519, 10237984, -4348115, 28542350, 13850243, -23678021, -15815942}}, {{5153746, 9909285, 1723747, -2777874, 30523605, 5516873, 19480852, 5230134, -23952439, -15175766},
{-30269007, -3463509, 7665486, 10083793, 28475525, 1649722, 20654025, 16520125, 30598449, 7715701},
{28881845, 14381568, 9657904, 3680757, -20181635, 7843316, -31400660, 1370708, 29794553, -1409300}}, {{-22518993, -6692182, 14201702, -8745502, -23510406, 8844726, 18474211, -1361450, -13062696, 13821877},
{-6455177, -7839871, 3374702, -4740862, -27098617, -10571707, 31655028, -7212327, 18853322, -14220951},
{4566830, -12963868, -28974889, -12240689, -7602672, -2830569, -8514358, -10431137, 2207753, -3209784}}, {{-25154831, -4185821, 29681144, 7868801, -6854661, -9423865, -12437364, -663000, -31111463, -16132436},
{25576264, -2703214, 7349804, -11814844, 16472782, 9300885, 3844789, 15725684, 171356, 6466918},
{23103977, 13316479, 9739013, -16149481, 817875, -15038942, 8965339, -14088058, -30714912, 16193877}}, {{-33521811, 3180713, -2394130, 14003687, -16903474, -16270840, 17238398, 4729455, -18074513, 9256800},
{-25182317, -4174131, 32336398, 5036987, -21236817, 11360617, 22616405, 9761698, -19827198, 630305},
{-13720693, 2639453, -24237460, -7406481, 9494427, -5774029, -6554551, -15960994, -2449256, -14291300}}, {{-3151181, -5046075, 9282714, 6866145, -31907062, -863023, -18940575, 15033784, 25105118, -7894876},
{-24326370, 15950226, -31801215, -14592823, -11662737, -5090925, 1573892, -2625887, 2198790, -15804619},
{-3099351, 10324967, -2241613, 7453183, -5446979, -2735503, -13812022, -16236442, -32461234, -12290683}}
};
/* A = 2 * (1 - d) / (1 + d) = 486662 */
const fe fe_ma2 = {-12721188, -3529, 0, 0, 0, 0, 0, 0, 0, 0}; /* -A^2 */
const fe fe_ma = {-486662, 0, 0, 0, 0, 0, 0, 0, 0, 0}; /* -A */
const fe fe_fffb1 = {-31702527, -2466483, -26106795, -12203692, -12169197, -321052, 14850977, -10296299, -16929438, -407568}; /* sqrt(-2 * A * (A + 2)) */
const fe fe_fffb2 = {8166131, -6741800, -17040804, 3154616, 21461005, 1466302, -30876704, -6368709, 10503587, -13363080}; /* sqrt(2 * A * (A + 2)) */
const fe fe_fffb3 = {-13620103, 14639558, 4532995, 7679154, 16815101, -15883539, -22863840, -14813421, 13716513, -6477756}; /* sqrt(-sqrt(-1) * A * (A + 2)) */
const fe fe_fffb4 = {-21786234, -12173074, 21573800, 4524538, -4645904, 16204591, 8012863, -8444712, 3212926, 6885324}; /* sqrt(sqrt(-1) * A * (A + 2)) */

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// Copyright (c) 2014-2017, The Monero Project
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modification, are
// permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this list of
// conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice, this list
// of conditions and the following disclaimer in the documentation and/or other
// materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its contributors may be
// used to endorse or promote products derived from this software without specific
// prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Parts of this file are originally copyright (c) 2012-2013 The Cryptonote developers
#pragma once
/* From fe.h */
typedef int32_t fe[10];
/* From ge.h */
typedef struct {
fe X;
fe Y;
fe Z;
} ge_p2;
typedef struct {
fe X;
fe Y;
fe Z;
fe T;
} ge_p3;
typedef struct {
fe X;
fe Y;
fe Z;
fe T;
} ge_p1p1;
typedef struct {
fe yplusx;
fe yminusx;
fe xy2d;
} ge_precomp;
typedef struct {
fe YplusX;
fe YminusX;
fe Z;
fe T2d;
} ge_cached;
/* From ge_add.c */
void ge_add(ge_p1p1 *, const ge_p3 *, const ge_cached *);
/* From ge_double_scalarmult.c, modified */
typedef ge_cached ge_dsmp[8];
extern const ge_precomp ge_Bi[8];
void ge_dsm_precomp(ge_dsmp r, const ge_p3 *s);
void ge_double_scalarmult_base_vartime(ge_p2 *, const unsigned char *, const ge_p3 *, const unsigned char *);
/* From ge_frombytes.c, modified */
extern const fe fe_sqrtm1;
extern const fe fe_d;
int ge_frombytes_vartime(ge_p3 *, const unsigned char *);
/* From ge_p1p1_to_p2.c */
void ge_p1p1_to_p2(ge_p2 *, const ge_p1p1 *);
/* From ge_p1p1_to_p3.c */
void ge_p1p1_to_p3(ge_p3 *, const ge_p1p1 *);
/* From ge_p2_dbl.c */
void ge_p2_dbl(ge_p1p1 *, const ge_p2 *);
/* From ge_p3_to_cached.c */
extern const fe fe_d2;
void ge_p3_to_cached(ge_cached *, const ge_p3 *);
/* From ge_p3_to_p2.c */
void ge_p3_to_p2(ge_p2 *, const ge_p3 *);
/* From ge_p3_tobytes.c */
void ge_p3_tobytes(unsigned char *, const ge_p3 *);
/* From ge_scalarmult_base.c */
extern const ge_precomp ge_base[32][8];
void ge_scalarmult_base(ge_p3 *, const unsigned char *);
/* From ge_tobytes.c */
void ge_tobytes(unsigned char *, const ge_p2 *);
/* From sc_reduce.c */
void sc_reduce(unsigned char *);
/* New code */
void ge_scalarmult(ge_p2 *, const unsigned char *, const ge_p3 *);
void ge_double_scalarmult_precomp_vartime(ge_p2 *, const unsigned char *, const ge_p3 *, const unsigned char *, const ge_dsmp);
void ge_mul8(ge_p1p1 *, const ge_p2 *);
extern const fe fe_ma2;
extern const fe fe_ma;
extern const fe fe_fffb1;
extern const fe fe_fffb2;
extern const fe fe_fffb3;
extern const fe fe_fffb4;
void ge_fromfe_frombytes_vartime(ge_p2 *, const unsigned char *);
void sc_0(unsigned char *);
void sc_reduce32(unsigned char *);
void sc_add(unsigned char *, const unsigned char *, const unsigned char *);
void sc_sub(unsigned char *, const unsigned char *, const unsigned char *);
void sc_mulsub(unsigned char *, const unsigned char *, const unsigned char *, const unsigned char *);
int sc_check(const unsigned char *);
int sc_isnonzero(const unsigned char *); /* Doesn't normalize */
// internal
uint64_t load_3(const unsigned char *in);
uint64_t load_4(const unsigned char *in);
void ge_sub(ge_p1p1 *r, const ge_p3 *p, const ge_cached *q);
void fe_add(fe h, const fe f, const fe g);
void fe_tobytes(unsigned char *, const fe);
void fe_invert(fe out, const fe z);

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#include "how_monero_hodl_jni_CryptoOpsUtil.h"
#include <unistd.h>
#include <stdint.h>
#include "crypto-ops.h"
JNIEXPORT jbyteArray JNICALL Java_how_monero_hodl_jni_CryptoOpsUtil_scalarMult
(JNIEnv *env, jclass cls, jbyteArray pointBytes, jbyteArray scalarBytes) {
jbyte* pointBytesBuf = (*env)->GetByteArrayElements(env, pointBytes, NULL);
jbyte* scalarBytesBuf = (*env)->GetByteArrayElements(env, scalarBytes, NULL);
ge_p3 pointp3;
ge_p2 pointp2;
ge_p2 pointp2result;
ge_frombytes_vartime(&pointp3, (const unsigned char *) pointBytesBuf);
ge_p3_to_p2(&pointp2, &pointp3);
ge_scalarmult(&pointp2result, (const unsigned char *) scalarBytesBuf, &pointp3);
unsigned char resultBytes[32];
ge_tobytes(resultBytes, &pointp2result);
jbyteArray returnData = (*env)->NewByteArray(env, 32);
(*env)->SetByteArrayRegion(env, returnData, 0, 32, (jbyte *) resultBytes);
return returnData;
}
//void ge_scalarmult_base(ge_p3 *h, const unsigned char *a) {
JNIEXPORT jbyteArray JNICALL Java_how_monero_hodl_jni_CryptoOpsUtil_scalarMultBase
(JNIEnv *env, jclass cls, jbyteArray scalarBytes) {
jbyte* scalarBytesBuf = (*env)->GetByteArrayElements(env, scalarBytes, NULL);
ge_p3 pointp3result;
ge_p2 pointp2result;
ge_scalarmult_base(&pointp3result, (const unsigned char *) scalarBytesBuf);
ge_p3_to_p2(&pointp2result, &pointp3result);
unsigned char resultBytes[32];
ge_tobytes(resultBytes, &pointp2result);
jbyteArray returnData = (*env)->NewByteArray(env, 32);
(*env)->SetByteArrayRegion(env, returnData, 0, 32, (jbyte *) resultBytes);
return returnData;
}
//ge_double_scalarmult_base_vartime(ge_p2 *r, const unsigned char *a, const ge_p3 *A, const unsigned char *b)
//r = a * A + b * B
JNIEXPORT jbyteArray JNICALL Java_how_monero_hodl_jni_CryptoOpsUtil_doubleScalarMultBaseVartime
(JNIEnv *env, jclass cls, jbyteArray aScalarBytes, jbyteArray pointBytes, jbyteArray bScalarBytes) {
jbyte* pointBytesBuf = (*env)->GetByteArrayElements(env, pointBytes, NULL);
jbyte* aScalarBytesBuf = (*env)->GetByteArrayElements(env, aScalarBytes, NULL);
jbyte* bScalarBytesBuf = (*env)->GetByteArrayElements(env, bScalarBytes, NULL);
ge_p3 pointp3;
ge_p2 pointp2;
ge_p2 pointp2result;
ge_frombytes_vartime(&pointp3, (const unsigned char *) pointBytesBuf);
ge_double_scalarmult_base_vartime(&pointp2result, (const unsigned char *) aScalarBytesBuf, &pointp3, (const unsigned char *) bScalarBytesBuf);
unsigned char resultBytes[32];
ge_tobytes(resultBytes, &pointp2result);
jbyteArray returnData = (*env)->NewByteArray(env, 32);
(*env)->SetByteArrayRegion(env, returnData, 0, 32, (jbyte *) resultBytes);
return returnData;
}

29
source-code/RuffCT-java/c/how_monero_hodl_jni_CryptoOpsUtil.h Normal file
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/* DO NOT EDIT THIS FILE - it is machine generated */
#include <jni.h>
/* Header for class how_monero_hodl_jni_CryptoOpsUtil */
#ifndef _Included_how_monero_hodl_jni_CryptoOpsUtil
#define _Included_how_monero_hodl_jni_CryptoOpsUtil
#ifdef __cplusplus
extern "C" {
#endif
/*
* Class: how_monero_hodl_jni_CryptoOpsUtil
* Method: scalarMult
* Signature: ([B[B)[B
*/
JNIEXPORT jbyteArray JNICALL Java_how_monero_hodl_jni_CryptoOpsUtil_scalarMult
(JNIEnv *, jclass, jbyteArray, jbyteArray);
/*
* Class: how_monero_hodl_jni_CryptoOpsUtil
* Method: doubleScalarMultBaseVartime
* Signature: ([B[B[B)[B
*/
JNIEXPORT jbyteArray JNICALL Java_how_monero_hodl_jni_CryptoOpsUtil_doubleScalarMultBaseVartime
(JNIEnv *, jclass, jbyteArray, jbyteArray, jbyteArray);
#ifdef __cplusplus
}
#endif
#endif

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#pragma once
#if defined(_MSC_VER)
#define PUSH_WARNINGS __pragma(warning(push))
#define POP_WARNINGS __pragma(warning(pop))
#define DISABLE_VS_WARNINGS(w) __pragma(warning(disable: w))
#define DISABLE_GCC_WARNING(w)
#define DISABLE_CLANG_WARNING(w)
#define DISABLE_GCC_AND_CLANG_WARNING(w)
#else
#include <boost/preprocessor/stringize.hpp>
#define PUSH_WARNINGS _Pragma("GCC diagnostic push")
#define POP_WARNINGS _Pragma("GCC diagnostic pop")
#define DISABLE_VS_WARNINGS(w)
#if defined(__clang__)
#define DISABLE_GCC_WARNING(w)
#define DISABLE_CLANG_WARNING DISABLE_GCC_AND_CLANG_WARNING
#else
#define DISABLE_GCC_WARNING DISABLE_GCC_AND_CLANG_WARNING
#define DISABLE_CLANG_WARNING(w)
#endif
#define DISABLE_GCC_AND_CLANG_WARNING(w) _Pragma(BOOST_PP_STRINGIZE(GCC diagnostic ignored BOOST_PP_STRINGIZE(-W##w)))
#endif

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Instructions for compiling the Ed25519 native library
-----------------------------------------------------
Note: You don't need to do any of this if you don't want to. The code will automatically fall back to a pure Java Ed25519 implementation.
To compile the JNI C library:
cd <path to RuffCT-java/c directory>
# replace <OS> with darwin on OSX, or with linux on Linux.
gcc -fPIC -c how_monero_hodl_jni_CryptoOpsUtil.c crypto-ops.c crypto-ops-data.c -I /<path to jdk>/include/<OS>/ -I /<path to jdk>/include
gcc -dynamiclib -o libcryptoopsutil.jnilib how_monero_hodl_jni_CryptoOpsUtil.o crypto-ops.o crypto-ops-data.o -framework JavaVM
When running Java code that uses this JNI library, provide the following command line argument:
-Djava.library.path=/<path to directory containing libcryptoopsutil.jnilib>

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source-code/RuffCT-java/src/com/joemelsha/crypto/hash/Keccak.java Executable file
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package com.joemelsha.crypto.hash;
import java.nio.*;
/**
* @author Joseph Robert Melsha (jrmelsha@olivet.edu)
*
* Source: https://github.com/jrmelsha/keccak
* Created: Jun 23, 2016
*
* Copyright 2016 Joseph Robert Melsha
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
public class Keccak {
private static final int MAX_STATE_SIZE = 1600;
private static final int MAX_STATE_SIZE_WORDS = MAX_STATE_SIZE / 64;
protected int rateSizeBits, digestSizeBits;
private long[] state = new long[MAX_STATE_SIZE_WORDS];
private int rateBits;
private boolean padded;
public Keccak(int digestSizeBits) {
reset(digestSizeBits);
}
public Keccak(Keccak other) {
System.arraycopy(other.state, 0, state, 0, other.state.length);
rateBits = other.rateBits;
rateSizeBits = other.rateSizeBits;
digestSizeBits = other.digestSizeBits;
padded = other.padded;
}
@Override
public String toString() {
return "Keccak-" + digestSizeBits;
}
public int rateSize() {
return rateSizeBits >>> 3;
}
public int digestSize() {
return digestSizeBits >>> 3;
}
public void reset() {
reset(rateSizeBits, digestSizeBits);
}
protected int rateSizeBitsFor(int digestSizeBits) {
//@formatter:off
switch (digestSizeBits) {
case 288: return 1024;
case 128: return 1344;
case 224: return 1152;
case 256: return 1088;
case 384: return 832;
case 512: return 576;
default: throw new IllegalArgumentException("Invalid digestSizeBits: " + digestSizeBits + " ⊄ { 128, 224, 256, 288, 384, 512 }");
}
//@formatter:on
}
public void reset(int digestSizeBits) {
reset(rateSizeBitsFor(digestSizeBits), digestSizeBits);
}
protected void reset(int rateSizebits, int digestSizeBits) {
if (rateSizebits + digestSizeBits * 2 != MAX_STATE_SIZE)
throw new IllegalArgumentException("Invalid rateSizebits + digestSizeBits * 2: " + rateSizebits + " + " + digestSizeBits + " * 2 != " + MAX_STATE_SIZE);
if (rateSizebits <= 0 || (rateSizebits & 0x3f) > 0)
throw new IllegalArgumentException("Invalid rateSizebits: " + rateSizebits);
for (int i = 0; i < MAX_STATE_SIZE_WORDS; ++i)
state[i] = 0;
rateBits = 0;
rateSizeBits = rateSizebits;
this.digestSizeBits = digestSizeBits;
padded = false;
}
public void update(byte in) {
updateBits(in & 0xff, 8);
}
public void update(byte[] in) {
update(ByteBuffer.wrap(in));
}
public void update(byte[] in, int offset, int length) {
update(ByteBuffer.wrap(in, offset, length));
}
public void update(ByteBuffer in) {
int inBytes = in.remaining();
if (inBytes <= 0)
return;
if (padded)
throw new IllegalStateException("Cannot update while padded");
int rateBits = this.rateBits;
if ((rateBits & 0x7) > 0) //this could be implemented but would introduce considerable performance degradation - also, it's never technically possible.
throw new IllegalStateException("Cannot update while in bit-mode");
long[] state = this.state;
int rateBytes = rateBits >>> 3;
int rateBytesWord = rateBytes & 0x7;
if (rateBytesWord > 0) {
//logically must have space at this point
int c = 8 - rateBytesWord;
if (c > inBytes)
c = inBytes;
int i = rateBytes >>> 3;
long w = state[i];
rateBytes += c;
inBytes -= c;
rateBytesWord <<= 3;
c = rateBytesWord + (c << 3);
do {
w ^= (long) (in.get() & 0xff) << rateBytesWord;
rateBytesWord += 8;
} while (rateBytesWord < c);
state[i] = w;
if (inBytes > 0) {
this.rateBits = rateBytes << 3;
return;
}
}
int rateWords = rateBytes >>> 3;
int rateSizeWords = rateSizeBits >>> 6;
int inWords = inBytes >>> 3;
if (inWords > 0) {
ByteOrder order = in.order();
try {
in.order(ByteOrder.LITTLE_ENDIAN);
do {
if (rateWords >= rateSizeWords) {
Keccak.keccak(state);
rateWords = 0;
}
int c = rateSizeWords - rateWords;
if (c > inWords)
c = inWords;
inWords -= c;
c += rateWords;
do {
state[rateWords] ^= in.getLong();
rateWords++;
} while (rateWords < c);
} while (inWords > 0);
} finally {
in.order(order);
}
inBytes &= 0x7;
if (inBytes <= 0) {
this.rateBits = rateWords << 6;
return;
}
}
if (rateWords >= rateSizeWords) {
Keccak.keccak(state);
rateWords = 0;
}
long w = state[rateWords];
inBytes <<= 3;
int i = 0;
do {
w ^= (long) (in.get() & 0xff) << i;
i += 8;
} while (i < inBytes);
state[rateWords] = w;
this.rateBits = (rateWords << 6) | inBytes;
}
protected void updateBits(long in, int inBits) {
if (inBits < 0 || inBits > 64)
throw new IllegalArgumentException("Invalid valueBits: " + 0 + " < " + inBits + " > " + 64);
if (inBits <= 0)
return;
if (padded)
throw new IllegalStateException("Cannot update while padded");
long[] state = this.state;
int rateBits = this.rateBits;
int rateBitsWord = rateBits & 0x3f;
if (rateBitsWord > 0) {
//logically must have space at this point
int c = 64 - rateBitsWord;
if (c > inBits)
c = inBits;
state[rateBits >>> 6] ^= (in & (-1L >>> c)) << rateBitsWord;
rateBits += c;
inBits -= c;
if (inBits <= 0) {
this.rateBits = rateBits;
return;
}
in >>>= c;
}
if (rateBits >= rateSizeBits) {
Keccak.keccak(state);
rateBits = 0;
}
state[rateBits >>> 6] ^= in & (-1L >>> inBits);
this.rateBits = rateBits + inBits;
}
public ByteBuffer digest() {
return digest(digestSize());
}
public ByteBuffer digest(int outSize) {
return digest(outSize, false);
}
public ByteBuffer digest(int outSize, boolean direct) {
ByteBuffer buffer = direct ? ByteBuffer.allocateDirect(outSize) : ByteBuffer.allocate(outSize);
digest(buffer);
buffer.flip();
return buffer;
}
public byte[] digestArray() {
return digestArray(digestSize());
}
public byte[] digestArray(int outSize) {
byte[] array = new byte[outSize];
digest(array, 0, outSize);
return array;
}
public void digest(byte[] out) {
digest(ByteBuffer.wrap(out));
}
public void digest(byte[] out, int offset, int length) {
digest(ByteBuffer.wrap(out, offset, length));
}
public void digest(ByteBuffer out) {
int outBytes = out.remaining();
if (outBytes <= 0)
return;
long[] state = this.state;
int rateBits = this.rateBits;
int rateBytes;
if (!padded) {
pad();
padded = true;
rateBits = 0;
rateBytes = 0;
} else {
if ((rateBits & 0x7) > 0)
throw new IllegalStateException("Cannot digest while in bit-mode"); //this could be implemented but would introduce considerable performance degradation - also, it's never technically possible.
rateBytes = rateBits >>> 3;
int rateBytesWord = rateBytes & 0x7;
if (rateBytesWord > 0) {
int c = 8 - rateBytesWord;
if (c > outBytes)
c = outBytes;
long w = state[rateBytes >>> 3];
outBytes -= c;
rateBytes += c;
rateBytesWord <<= 3;
c = (c << 3) + rateBytesWord;
do {
out.put((byte) (w >>> rateBytesWord));
rateBytesWord += 8;
} while (rateBytesWord < c);
if (outBytes <= 0) {
this.rateBits = rateBytes << 3;
return;
}
}
}
int rateSizeWords = rateSizeBits >>> 6;
int rateWords = rateBytes >>> 3;
int outWords = outBytes >>> 3;
if (outWords > 0) {
ByteOrder order = out.order();
try {
out.order(ByteOrder.LITTLE_ENDIAN);
do {
if (rateWords >= rateSizeWords) {
squeeze();
rateWords = 0;
}
int c = rateSizeWords - rateWords;
if (c > outWords)
c = outWords;
outWords -= c;
c += rateWords;
do {
out.putLong(state[rateWords]);
rateWords++;
} while (rateWords < c);
} while (outWords > 0);
} finally {
out.order(order);
}
outBytes &= 0x7;
if (outBytes <= 0) {
this.rateBits = rateWords << 6;
return;
}
}
if (rateWords >= rateSizeWords) {
squeeze();
rateWords = 0;
}
long w = state[rateWords];
outBytes <<= 3;
int i = 0;
do {
out.put((byte) (w >>> i));
i += 8;
} while (i < outBytes);
this.rateBits = (rateWords << 6) | outBytes;
}
protected void squeeze() {
Keccak.keccak(state);
}
protected void pad() {
updateBits(0x1, 1);
if (rateBits >= rateSizeBits) {
Keccak.keccak(state);
rateBits = 0;
}
rateBits = rateSizeBits - 1;
updateBits(0x1, 1);
Keccak.keccak(state);
}
/**
* @formatter:off
*/
private static void keccak(long[] a) {
//@formatter:off
int c, i;
long x, a_10_;
long x0, x1, x2, x3, x4;
long t0, t1, t2, t3, t4;
long c0, c1, c2, c3, c4;
long[] rc = RC;
i = 0;
do {
//theta (precalculation part)
c0 = a[0] ^ a[5 + 0] ^ a[10 + 0] ^ a[15 + 0] ^ a[20 + 0];
c1 = a[1] ^ a[5 + 1] ^ a[10 + 1] ^ a[15 + 1] ^ a[20 + 1];
c2 = a[2] ^ a[5 + 2] ^ a[10 + 2] ^ a[15 + 2] ^ a[20 + 2];
c3 = a[3] ^ a[5 + 3] ^ a[10 + 3] ^ a[15 + 3] ^ a[20 + 3];
c4 = a[4] ^ a[5 + 4] ^ a[10 + 4] ^ a[15 + 4] ^ a[20 + 4];
t0 = (c0 << 1) ^ (c0 >>> (64 - 1)) ^ c3;
t1 = (c1 << 1) ^ (c1 >>> (64 - 1)) ^ c4;
t2 = (c2 << 1) ^ (c2 >>> (64 - 1)) ^ c0;
t3 = (c3 << 1) ^ (c3 >>> (64 - 1)) ^ c1;
t4 = (c4 << 1) ^ (c4 >>> (64 - 1)) ^ c2;
//theta (xorring part) + rho + pi
a[ 0] ^= t1;
x = a[ 1] ^ t2; a_10_ = (x << 1) | (x >>> (64 - 1));
x = a[ 6] ^ t2; a[ 1] = (x << 44) | (x >>> (64 - 44));
x = a[ 9] ^ t0; a[ 6] = (x << 20) | (x >>> (64 - 20));
x = a[22] ^ t3; a[ 9] = (x << 61) | (x >>> (64 - 61));
x = a[14] ^ t0; a[22] = (x << 39) | (x >>> (64 - 39));
x = a[20] ^ t1; a[14] = (x << 18) | (x >>> (64 - 18));
x = a[ 2] ^ t3; a[20] = (x << 62) | (x >>> (64 - 62));
x = a[12] ^ t3; a[ 2] = (x << 43) | (x >>> (64 - 43));
x = a[13] ^ t4; a[12] = (x << 25) | (x >>> (64 - 25));
x = a[19] ^ t0; a[13] = (x << 8) | (x >>> (64 - 8));
x = a[23] ^ t4; a[19] = (x << 56) | (x >>> (64 - 56));
x = a[15] ^ t1; a[23] = (x << 41) | (x >>> (64 - 41));
x = a[ 4] ^ t0; a[15] = (x << 27) | (x >>> (64 - 27));
x = a[24] ^ t0; a[ 4] = (x << 14) | (x >>> (64 - 14));
x = a[21] ^ t2; a[24] = (x << 2) | (x >>> (64 - 2));
x = a[ 8] ^ t4; a[21] = (x << 55) | (x >>> (64 - 55));
x = a[16] ^ t2; a[ 8] = (x << 45) | (x >>> (64 - 45));
x = a[ 5] ^ t1; a[16] = (x << 36) | (x >>> (64 - 36));
x = a[ 3] ^ t4; a[ 5] = (x << 28) | (x >>> (64 - 28));
x = a[18] ^ t4; a[ 3] = (x << 21) | (x >>> (64 - 21));
x = a[17] ^ t3; a[18] = (x << 15) | (x >>> (64 - 15));
x = a[11] ^ t2; a[17] = (x << 10) | (x >>> (64 - 10));
x = a[ 7] ^ t3; a[11] = (x << 6) | (x >>> (64 - 6));
x = a[10] ^ t1; a[ 7] = (x << 3) | (x >>> (64 - 3));
a[10] = a_10_;
//chi
c = 0;
do {
x0 = a[c + 0]; x1 = a[c + 1]; x2 = a[c + 2]; x3 = a[c + 3]; x4 = a[c + 4];
a[c + 0] = x0 ^ ((~x1) & x2);
a[c + 1] = x1 ^ ((~x2) & x3);
a[c + 2] = x2 ^ ((~x3) & x4);
a[c + 3] = x3 ^ ((~x4) & x0);
a[c + 4] = x4 ^ ((~x0) & x1);
c += 5;
} while (c < 25);
//iota
a[0] ^= rc[i];
i++;
} while (i < 24);
//@formatter:on
}
private static final long[] RC = { 0x0000000000000001L, 0x0000000000008082L, 0x800000000000808AL, 0x8000000080008000L, 0x000000000000808BL, 0x0000000080000001L, 0x8000000080008081L,
0x8000000000008009L, 0x000000000000008AL, 0x0000000000000088L, 0x0000000080008009L, 0x000000008000000AL, 0x000000008000808BL, 0x800000000000008BL,
0x8000000000008089L, 0x8000000000008003L, 0x8000000000008002L, 0x8000000000000080L, 0x000000000000800AL, 0x800000008000000AL, 0x8000000080008081L,
0x8000000000008080L, 0x0000000080000001L, 0x8000000080008008L };
}

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package how.monero.hodl.crypto;
import com.joemelsha.crypto.hash.Keccak;
import how.monero.hodl.util.ExceptionAdapter;
import org.apache.commons.pool2.BasePooledObjectFactory;
import org.apache.commons.pool2.PooledObject;
import org.apache.commons.pool2.impl.DefaultPooledObject;
import org.apache.commons.pool2.impl.GenericObjectPool;
import org.nem.core.crypto.ed25519.arithmetic.*;
import java.math.BigInteger;
import java.security.SecureRandom;
import java.util.HashMap;
import java.util.Map;
import java.util.Random;
import static how.monero.hodl.crypto.HashToPoint.hashToPoint;
import static how.monero.hodl.util.ByteUtil.*;
public class CryptoUtil {
public static GenericObjectPool<Keccak> keccakPool = new GenericObjectPool<Keccak>(new BasePooledObjectFactory<Keccak>() {
@Override
public PooledObject<Keccak> wrap(Keccak keccak) {
return new DefaultPooledObject<>(keccak);
}
@Override
public Keccak create() throws Exception {
return new Keccak(256);
}
});
public static final Ed25519GroupElement G = Ed25519Group.BASE_POINT;
public static final Ed25519GroupElement H = new Ed25519EncodedGroupElement(hexToBytes("8b655970153799af2aeadc9ff1add0ea6c7251d54154cfa92c173a0dd39c1f94")).decode();
static {
H.precomputeForScalarMultiplication();
}
public static Scalar hashToScalar(byte[] a) {
return new Scalar(scReduce32(fastHash(a)));
}
public static byte[] fastHash(byte[] a) {
try {
Keccak keccak = keccakPool.borrowObject();
try {
keccak.reset();
keccak.update(a);
return keccak.digestArray();
} finally {
keccakPool.returnObject(keccak);
}
} catch (Exception e) {
throw ExceptionAdapter.toRuntimeException(e);
}
}
public static BigInteger l = BigInteger.valueOf(2).pow(252).add(new BigInteger("27742317777372353535851937790883648493"));
public static byte[] scReduce32(byte[] a) {
byte[] r = getBigIntegerFromUnsignedLittleEndianByteArray(a).mod(l).toByteArray();
return ensure32BytesAndConvertToLittleEndian(r);
}
public static byte[] ensure32BytesAndConvertToLittleEndian(byte[] r) {
byte[] s = new byte[32];
if(r.length>32) System.arraycopy(r, 1, s, 0, s.length);
else System.arraycopy(r, 0, s, 32 - r.length, r.length);
reverseByteArrayInPlace(s);
return s;
}
public static BigInteger getBigIntegerFromUnsignedLittleEndianByteArray(byte[] a1) {
byte[] a = new byte[a1.length];
System.arraycopy(a1, 0, a, 0, 32);
reverseByteArrayInPlace(a);
byte[] a2 = new byte[33];
System.arraycopy(a, 0, a2, 1, 32);
return new BigInteger(a2);
}
public static byte[] getUnsignedLittleEndianByteArrayFromBigInteger(BigInteger n) {
byte[] a = n.toByteArray();
byte[] a2 = new byte[32];
System.arraycopy(a, 0, a2, 32-a.length, a.length);
reverseByteArrayInPlace(a2);
return a2;
}
public static final Random random = new SecureRandom();
public static byte[] randomPointAsBytes() {
return randomPoint().encode().getRaw();
}
public static Ed25519GroupElement randomPoint() {
return Ed25519Group.BASE_POINT.scalarMultiply(Scalar.randomScalar());
}
public static byte[] randomMessage(int len) {
byte[] m = new byte[len];
random.nextBytes(m);
return m;
}
public static byte[] toBytes(Ed25519GroupElement[] a) {
byte[] r = new byte[0];
for(Ed25519GroupElement ai : a) r = concat(r, ai.encode().getRaw());
return r;
}
public static Scalar sumArray(Scalar[] a) {
Scalar r = Scalar.ZERO;
for(Scalar ai : a) r = r.add(ai);
return r;
}
public static PointPair COMeg(Scalar xAmount, Scalar rMask) {
return new PointPair(G.scalarMultiply(xAmount).add(getHpnGLookup(1).scalarMultiply(rMask).toCached()), G.scalarMultiply(rMask));
}
public static Ed25519GroupElement COMp(Scalar xAmount, Scalar rMask) {
return G.scalarMultiply(xAmount).add(getHpnGLookup(1).scalarMultiply(rMask).toCached());
}
public static Ed25519GroupElement COMb(Scalar[][] x, Scalar r) {
int m = x.length;
int n = x[0].length;
Ed25519GroupElement A = G.scalarMultiply(r);
for(int j=0; j<m; j++) {
for(int i=0; i<n; i++) {
A = A.toP3().add(getHpnGLookup(j * n + i + 1).scalarMultiply(x[j][i]).toCached());
}
}
return A;
}
public static Map<Integer, Ed25519GroupElement> HpnGLookup = new HashMap<>();
public static Ed25519GroupElement getHpnGLookup(int n) {
if(!HpnGLookup.containsKey(n)) {
Ed25519GroupElement HpnG = hashToPoint(G.scalarMultiply(Scalar.intToScalar(n)));
//HpnG.precomputeForScalarMultiplication(); // try precomputed vs non-precomputed to check best performance
HpnGLookup.put(n, HpnG);
}
return HpnGLookup.get(n);
}
public static PointPair ENCeg(Ed25519GroupElement X, Scalar r) {
return new PointPair(getHpnGLookup(1).scalarMultiply(r).toP3().add(X.toCached()), G.scalarMultiply(r));
}
}

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package how.monero.hodl.crypto;
import org.nem.core.crypto.ed25519.arithmetic.Ed25519EncodedGroupElement;
import org.nem.core.crypto.ed25519.arithmetic.Ed25519GroupElement;
import org.nem.core.utils.ArrayUtils;
import java.math.BigInteger;
import static how.monero.hodl.crypto.CryptoUtil.*;
import static how.monero.hodl.util.ByteUtil.*;
public class HashToPoint {
private static BigInteger b = BigInteger.valueOf(256);
private static BigInteger q = BigInteger.valueOf(2).pow(255).subtract(BigInteger.valueOf(19));
private static BigInteger p = q;
private static BigInteger l = BigInteger.valueOf(2).pow(252).add(new BigInteger("27742317777372353535851937790883648493"));
private static BigInteger I = expmod(BigInteger.valueOf(2), (q.subtract(BigInteger.ONE)).divide(BigInteger.valueOf(4)), q);
public static Ed25519GroupElement hashToPoint(Ed25519GroupElement a) {
return hashToPoint(a.encode().getRaw());
}
public static Ed25519GroupElement hashToPoint(byte[] a) {
byte[] hash = fastHash(a);
BigInteger u = ArrayUtils.toBigInteger(hash).mod(q);
BigInteger A = BigInteger.valueOf(486662);
BigInteger sqrtm1 = ed25519Sqroot(BigInteger.valueOf(-1));
BigInteger w = (BigInteger.valueOf(2).multiply(u).multiply(u).add(BigInteger.ONE)).mod(q);
BigInteger xp = w.multiply(w).subtract(BigInteger.valueOf(2).multiply(A).multiply(A).multiply(u).multiply(u)).mod(q);
BigInteger b = w.multiply(ed25519Inv(xp));
BigInteger e = (q.add(BigInteger.valueOf(3)).divide(BigInteger.valueOf(8)));
BigInteger rx = expmod(b, e, q);
BigInteger x = rx.multiply(rx).multiply(w.multiply(w).subtract(BigInteger.valueOf(2).multiply(A).multiply(A).multiply(u).multiply(u))).mod(q);
BigInteger y = (BigInteger.valueOf(2).multiply(u).multiply(u).add(BigInteger.ONE).subtract(x)).mod(q);
BigInteger z;
boolean negative = false;
if (!y.equals(BigInteger.ZERO)) {
y = (w.add(x)).mod(q);
if (!y.equals(BigInteger.ZERO)) {
negative = true;
} else {
rx = rx.multiply(BigInteger.valueOf(-1)).multiply(ed25519Sqroot(BigInteger.valueOf(-2).multiply(A).multiply((A.add(BigInteger.valueOf(2)))))).mod(q);
negative = false;
}
} else {
rx = rx.multiply(BigInteger.valueOf(-1)).multiply(ed25519Sqroot(BigInteger.valueOf(2).multiply(A).multiply((A.add(BigInteger.valueOf(2)))))).mod(q);
}
BigInteger sign;
if (!negative) {
rx = (rx.multiply(u)).mod(q);
z = (BigInteger.valueOf(-2).multiply(A).multiply(u).multiply(u)).mod(q);
sign = BigInteger.ZERO;
} else {
z = BigInteger.valueOf(-1).multiply(A);
x = x.multiply(sqrtm1).mod(q);
y = (w.subtract(x)).mod(q);
if (!y.equals(BigInteger.ZERO)) {
rx = rx.multiply(ed25519Sqroot(BigInteger.valueOf(-1).multiply(sqrtm1).multiply(A).multiply((A.add(BigInteger.valueOf(2)))))).mod(q);
} else {
rx = rx.multiply(BigInteger.valueOf(-1)).multiply(ed25519Sqroot(sqrtm1.multiply(A).multiply((A.add(BigInteger.valueOf(2)))))).mod(q);
}
sign = BigInteger.ONE;
}
if(!(rx.mod(BigInteger.valueOf(2)).equals(sign))) {
rx = rx.mod(q).negate();
}
BigInteger rz = (z.add(w)).mod(q);
BigInteger ry = (z.subtract(w)).mod(q);
rx = (rx.multiply(rz)).mod(q);
Ed25519GroupElement P = pointCompress(rx, ry, rz);
Ed25519GroupElement P8 = P.toP2().dbl().toP2().dbl().toP2().dbl().toP3();
return P8;
}
private static Ed25519GroupElement pointCompress(BigInteger P0, BigInteger P1, BigInteger P2) {
BigInteger zinv = modpInv(P2);
BigInteger x = P0.multiply(zinv).mod(p);
BigInteger y = P1.multiply(zinv).mod(p);
BigInteger r = y.or((x.and(BigInteger.ONE)).shiftLeft(255));
byte[] a = r.toByteArray();
byte[] b = new byte[32];
if(a.length>32) System.arraycopy(a, a.length-32, b, 0, 32);
else if(a.length<32) System.arraycopy(a, 0, b, 32-a.length, a.length);
else System.arraycopy(a, 0, b, 0, 32);
reverseByteArrayInPlace(b);
return new Ed25519EncodedGroupElement(b).decode();
}
private static BigInteger modpInv(BigInteger x) {
return x.modPow(p.subtract(BigInteger.valueOf(2)), p);
}
private static BigInteger ed25519Inv(BigInteger x) {
return expmod(x, q.subtract(BigInteger.valueOf(2)), q);
}
private static BigInteger ed25519Sqroot(BigInteger xx) {
BigInteger x = expmod(xx, q.add(BigInteger.valueOf(3)).divide(BigInteger.valueOf(8)), q);
if (!x.multiply(x).subtract(xx).mod(q).equals(BigInteger.ZERO)) {
x = x.multiply(I).mod(q);
}
if (!x.multiply(x).subtract(xx).mod(q).equals(BigInteger.ZERO)) {
throw new RuntimeException("no square root!");
}
return x;
}
private static BigInteger expmod(BigInteger b, BigInteger e, BigInteger m) {
if (e.equals(BigInteger.ZERO)) return BigInteger.ONE;
BigInteger t = expmod(b, e.divide(BigInteger.valueOf(2)), m).pow(2).mod(m);
if(e.and(BigInteger.ONE).equals(BigInteger.ONE)) t = (t.multiply(b)).mod(m);
return t;
}
}

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source-code/RuffCT-java/src/how/monero/hodl/crypto/PointPair.java Normal file
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package how.monero.hodl.crypto;
import org.nem.core.crypto.ed25519.arithmetic.Ed25519GroupElement;
import static how.monero.hodl.util.ByteUtil.*;
public class PointPair {
public Ed25519GroupElement P1;
public Ed25519GroupElement P2;
public PointPair(Ed25519GroupElement P1, Ed25519GroupElement P2) {
this.P1 = P1;
this.P2 = P2;
}
public byte[] toBytes() {
return concat(P1.encode().getRaw(), P2.encode().getRaw());
}
public PointPair add(PointPair a) {
return new PointPair(P1.toP3().add(a.P1.toP3().toCached()), P2.toP3().add(a.P2.toP3().toCached()));
}
public PointPair subtract(PointPair a) {
return new PointPair(P1.toP3().subtract(a.P1.toCached()), P2.toP3().subtract(a.P2.toCached()));
}
public PointPair multiply(Scalar n) {
return new PointPair(P1.toP3().scalarMultiply(n), P2.toP3().scalarMultiply(n));
}
public boolean equals(PointPair obj) {
return P1.toP3().equals(obj.P1.toP3()) && P2.toP3().equals(obj.P2.toP3());
}
@Override
public String toString() {
return "(P1: " + bytesToHex(P1.encode().getRaw()) + ", P2: " + P2 + ")";
}
}

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source-code/RuffCT-java/src/how/monero/hodl/crypto/Scalar.java Normal file
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package how.monero.hodl.crypto;
import how.monero.hodl.util.ByteUtil;
import org.nem.core.crypto.ed25519.arithmetic.Ed25519EncodedFieldElement;
import org.nem.core.crypto.ed25519.arithmetic.Ed25519FieldElement;
import java.math.BigInteger;
import java.util.Arrays;
import static how.monero.hodl.crypto.CryptoUtil.*;
import static how.monero.hodl.util.ByteUtil.*;
public class Scalar {
public final static Scalar ZERO = intToScalar(0);
public final static Scalar ONE = intToScalar(1);
public final static Scalar TWO = intToScalar(2);
public final static Scalar MINUS_ONE = intToScalar(-1);
// use only for small numbers
public static Scalar intToScalar(int a) {
return new Scalar(scReduce32(getUnsignedLittleEndianByteArrayFromBigInteger(BigInteger.valueOf(a).mod(l))));
}
public byte[] bytes;
public Scalar(byte[] bytes) {
this.bytes = bytes;
}
public Scalar(String hex) {
this.bytes = ByteUtil.hexToBytes(hex);
}
public Scalar(BigInteger a) {
this(scReduce32(getUnsignedLittleEndianByteArrayFromBigInteger(a.mod(l))));
}
public Ed25519EncodedFieldElement toEd25519EncodedFieldElement() {
return new Ed25519EncodedFieldElement(bytes);
}
public Ed25519FieldElement toEd25519FieldElement() {
return new Ed25519EncodedFieldElement(bytes).decode();
}
public static Scalar randomScalar() {
byte[] s = new byte[32];
random.nextBytes(s);
s = CryptoUtil.scReduce32(s);
return new Scalar(s);
}
@Override
public String toString() {
return bytesToHex(bytes);
}
public BigInteger toBigInteger() {
return getBigIntegerFromUnsignedLittleEndianByteArray(this.bytes);
}
@Override
public boolean equals(Object obj) {
return Arrays.equals(this.bytes, ((Scalar)obj).bytes);
}
public static BigInteger[] scalarArrayToBigIntegerArray(Scalar[] a) {
BigInteger[] r = new BigInteger[a.length];
for(int i=0; i<a.length; i++) r[i] = a[i].toBigInteger();
return r;
}
public static void printScalarArray(Scalar[] a) {
for(int i=0; i<a.length; i++) {
System.out.print(a[i].toBigInteger()+"");
if(i==a.length-1) System.out.println("");
else System.out.print(", ");
}
}
public static Scalar[] bigIntegerArrayToScalarArray(BigInteger[] a) {
int len = a.length;
Scalar[] r = new Scalar[len];
for(int i=0; i<len; i++) {
r[i] = new Scalar(a[i]);
}
return r;
}
public Scalar add(Scalar a) { return new Scalar(ensure32BytesAndConvertToLittleEndian(getBigIntegerFromUnsignedLittleEndianByteArray(this.bytes).add(getBigIntegerFromUnsignedLittleEndianByteArray(a.bytes)).mod(l).toByteArray())); }
public Scalar sub(Scalar a) { return new Scalar(ensure32BytesAndConvertToLittleEndian(getBigIntegerFromUnsignedLittleEndianByteArray(this.bytes).subtract(getBigIntegerFromUnsignedLittleEndianByteArray(a.bytes)).mod(l).toByteArray())); }
public Scalar mul(Scalar a) { return new Scalar(ensure32BytesAndConvertToLittleEndian(getBigIntegerFromUnsignedLittleEndianByteArray(this.bytes).multiply(getBigIntegerFromUnsignedLittleEndianByteArray(a.bytes)).mod(l).toByteArray())); }
public Scalar sq() { return new Scalar(ensure32BytesAndConvertToLittleEndian(getBigIntegerFromUnsignedLittleEndianByteArray(this.bytes).multiply(getBigIntegerFromUnsignedLittleEndianByteArray(this.bytes)).mod(l).toByteArray())); }
public Scalar pow(int b) {
Scalar result = Scalar.ONE;
for(int i=0; i<b; i++) {
result = result.mul(this);
}
return result;
}
}

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source-code/RuffCT-java/src/how/monero/hodl/crypto/ScalarPair.java Normal file
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package how.monero.hodl.crypto;
import org.nem.core.crypto.ed25519.arithmetic.Ed25519FieldElement;
public class ScalarPair {
Ed25519FieldElement p1;
Ed25519FieldElement p2;
public ScalarPair(Ed25519FieldElement p1, Ed25519FieldElement p2) {
this.p1 = p1;
this.p2 = p2;
}
}

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source-code/RuffCT-java/src/how/monero/hodl/cursor/BootleRuffingCursor.java Normal file
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package how.monero.hodl.cursor;
import how.monero.hodl.crypto.PointPair;
import how.monero.hodl.crypto.Scalar;
import org.nem.core.crypto.ed25519.arithmetic.Ed25519EncodedFieldElement;
import org.nem.core.crypto.ed25519.arithmetic.Ed25519EncodedGroupElement;
import org.nem.core.crypto.ed25519.arithmetic.Ed25519FieldElement;
import org.nem.core.crypto.ed25519.arithmetic.Ed25519GroupElement;
public class BootleRuffingCursor extends Cursor {
public byte[] data;
public BootleRuffingCursor(byte[] data) {
super(data);
}
public Ed25519GroupElement readGroupElement() {
return new Ed25519EncodedGroupElement(readBytes(32)).decode();
}
public Ed25519FieldElement readFieldElement() {
return new Ed25519EncodedFieldElement(readBytes(32)).decode();
}
public PointPair[] readPointPairArray(int len) {
PointPair[] result = new PointPair[len];
for(int i=0; i<len; i++) result[i] = new PointPair(readGroupElement(), readGroupElement());
return result;
}
public Scalar[][] readScalar2DArray(int m, int n) {
Scalar[][] result = new Scalar[m][n];
for(int j=0; j<m; j++) {
for(int i=0; i<n; i++) {
result[j][i] = readScalar();
}
}
return result;
}
}

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source-code/RuffCT-java/src/how/monero/hodl/cursor/Cursor.java Normal file
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package how.monero.hodl.cursor;
import how.monero.hodl.crypto.Scalar;
import java.math.BigInteger;
public class Cursor {
public int pos = 0;
protected byte[] data;
public Cursor(byte[] data) {
this.data = data;
}
public long readVarInt() {
long result = 0;
int c = 0;
while(true) {
boolean isLastByteInVarInt = true;
int i = Byte.toUnsignedInt(data[pos]);
if(i>=128) {
isLastByteInVarInt = false;
i-=128;
}
result += Math.round(i * Math.pow(128, c));
c++;
pos++;
if(isLastByteInVarInt) break;
}
return result;
}
public BigInteger readVarIntAsBigInteger() {
BigInteger result = BigInteger.ZERO;
int c = 0;
while(true) {
boolean isLastByteInVarInt = true;
int i = Byte.toUnsignedInt(data[pos]);
if(i>=128) {
isLastByteInVarInt = false;
i-=128;
}
result = result.add(BigInteger.valueOf(Math.round(i * Math.pow(128, c))));
c++;
pos++;
if(isLastByteInVarInt) break;
}
return result;
}
public byte[] readBytes(int len) {
byte[] bytes = new byte[len];
System.arraycopy(data, pos, bytes, 0, len);
pos+=len;
return bytes;
}
public Scalar readScalar() {
return new Scalar(readBytes(32));
}
public int readByte() {
pos++;
return Byte.toUnsignedInt(data[pos-1]);
}
public byte[] readKey() {
return readBytes(32);
}
}

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source-code/RuffCT-java/src/how/monero/hodl/jni/CryptoOpsUtil.java Normal file
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package how.monero.hodl.jni;
public class CryptoOpsUtil {
static { System.loadLibrary("cryptoopsutil"); }
public static native byte[] scalarMult(byte[] point, byte[] scalar);
public static native byte[] scalarMultBase(byte[] scalar);
public static native byte[] doubleScalarMultBaseVartime(byte[] aScalar, byte[] point, byte[] bScalar);
}

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source-code/RuffCT-java/src/how/monero/hodl/ringSignature/BootleRuffing.java Normal file
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package how.monero.hodl.ringSignature;
import how.monero.hodl.crypto.PointPair;
import how.monero.hodl.crypto.Scalar;
import how.monero.hodl.cursor.BootleRuffingCursor;
import how.monero.hodl.util.VarInt;
import org.nem.core.crypto.ed25519.arithmetic.*;
import java.math.BigInteger;
import java.util.HashMap;
import java.util.Map;
import static how.monero.hodl.crypto.CryptoUtil.*;
import static how.monero.hodl.crypto.HashToPoint.hashToPoint;
import static how.monero.hodl.crypto.Scalar.bigIntegerArrayToScalarArray;
import static how.monero.hodl.crypto.Scalar.randomScalar;
import static how.monero.hodl.util.ByteUtil.*;
public class BootleRuffing {
public static class SK {
public Scalar r;
public Scalar r1;
public SK(Scalar r, Scalar r1) {
this.r = r; this.r1 = r1;
}
@Override
public String toString() {
return "(r: " + bytesToHex(r) + ", r1: " + bytesToHex(r1) + ")";
}
}
public static KeyGenResult KEYGEN() {
SK sk = new SK(randomScalar(), randomScalar());
Ed25519GroupElement ki = G.scalarMultiply(sk.r1);
PointPair pk = ENCeg(ki, sk.r);
return new KeyGenResult(sk, ki, pk);
}
public static class KeyGenResult {
public SK sk;
public Ed25519GroupElement ki;
public PointPair pk = null;
public KeyGenResult(SK sk, Ed25519GroupElement ki, PointPair pk) {
this.sk = sk; this.ki = ki; this.pk = pk;
}
@Override
public String toString() {
return "sk: " + sk.toString() + ", ki: " + bytesToHex(ki.encode().getRaw()) + ", pk: " + (pk==null ? "(no pk)" : "pk: " + pk);
}
}
public static class F {
public Ed25519GroupElement[] ki;
public PointPair[][] pk;
public Ed25519GroupElement[] co;
public Ed25519GroupElement co1;
byte[] M;
public F(Ed25519GroupElement[] ki, PointPair[][] pk, Ed25519GroupElement[] co, Ed25519GroupElement co1, byte[] M) {
this.ki = ki; this.pk = pk; this.co = co; this.co1 = co1; this.M = M;
}
byte[] toBytes() {
byte[] r = new byte[0];
for(int i=0; i<ki.length; i++) r = concat(r, ki[i].encode().getRaw());
for(int i=0; i<pk.length; i++) for(int j=0; j<pk[i].length; j++) r = concat(r, pk[i][j].toBytes());
for(int i=0; i<co.length; i++) r = concat(r, co[i].encode().getRaw());
r = concat(r, co1.encode().getRaw());
r = concat(r, M);
return r;
}
}
public static SpendSignature SPEND(SpendParams sp) {
int iAsterisk = sp.iAsterisk;
PointPair[][] pk = sp.pk;
SK[] sk = sp.sk;
Ed25519GroupElement[] ki = sp.ki;
Ed25519GroupElement[] co = sp.co;
byte[] M = sp.M;
Scalar s = sp.s;
int decompositionBase = sp.decompositionBase;
int decompositionExponent = sp.decompositionExponent;
Ed25519GroupElement co1 = G.scalarMultiply(s);
F f = new F(ki, pk, co, co1, M);
SubResult cf1 = SUB(f);
Scalar s1 = s;
for(int i=0; i<sk.length; i++) s1 = s1.add(sk[i].r.mul(cf1.f[i]));
Proof2 sigma1 = PROVE2(cf1.c, iAsterisk, s1, pk.length, decompositionBase, decompositionExponent);
Scalar[] r1 = new Scalar[sk.length];
for(int i=0; i<r1.length; i++) r1[i] = sk[i].r1;
Multisignature.Signature sigma2 = Multisignature.sign(concat(sigma1.toBytes(decompositionBase, decompositionExponent), f.toBytes()), r1, null);
return new SpendSignature(decompositionBase, decompositionExponent, co1, sigma1, sigma2);
}
public static class SpendSignature {
public int decompositionBase;
public int decompositionExponent;
public Ed25519GroupElement co1;
public Proof2 sigma1;
Multisignature.Signature sigma2;
public SpendSignature(int decompositionBase, int decompositionExponent, Ed25519GroupElement co1, Proof2 sigma1, Multisignature.Signature sigma2) {
this.decompositionBase = decompositionBase; this.decompositionExponent = decompositionExponent; this.co1 = co1; this.sigma1 = sigma1; this.sigma2 = sigma2;
}
public byte[] toBytes() {
byte[] result;
result = concat(VarInt.writeVarInt(decompositionBase), VarInt.writeVarInt(decompositionExponent));
result = concat(result, co1.encode().getRaw(), sigma1.toBytes(decompositionBase, decompositionExponent), sigma2.toBytes());
return result;
}
public static SpendSignature fromBytes(byte[] a) {
BootleRuffingCursor cursor = new BootleRuffingCursor(a);
int decompositionBase = (int) cursor.readVarInt();
int decompositionExponent = (int) cursor.readVarInt();
return new SpendSignature(decompositionBase, decompositionExponent,
cursor.readGroupElement(),
new Proof2(
new Proof1(cursor.readGroupElement(), cursor.readGroupElement(), cursor.readGroupElement(),
cursor.readScalar2DArray(decompositionExponent, decompositionBase-1), cursor.readScalar(), cursor.readScalar(), null),
cursor.readGroupElement(),
cursor.readPointPairArray(decompositionExponent), cursor.readScalar()),
new Multisignature.Signature(cursor.readGroupElement(), cursor.readScalar()));
}
}
public static SubResult SUB(F fin) {
int L = fin.pk.length; // inputs
int N = fin.pk[0].length; // ring size
PointPair[] pkz = new PointPair[L];
Scalar[] f = new Scalar[L];
for(int j=0; j<L; j++) {
pkz[j] = new PointPair(fin.ki[j], Ed25519Group.ZERO_P3);
f[j] = hashToScalar(concat(fin.ki[j].encode().getRaw(), fin.toBytes(), longToLittleEndianUint32ByteArray(j)));
}
PointPair[] c = new PointPair[N];
for(int i=0; i<N; i++) {
c[i] = new PointPair(fin.co[i], fin.co1);
for(int j=0; j<L; j++) {
c[i] = c[i].add( (fin.pk[j][i].subtract(pkz[j])).multiply(f[j]) );
}
}
return new SubResult(c, f);
}
public static class SubResult {
public PointPair[] c;
public Scalar[] f;
public SubResult(PointPair[] c, Scalar[] f) {
this.c = c; this.f = f;
}
}
public static Proof1 PROVE1(Scalar[][] b, Scalar r) {
int m = b.length; // decompositionExponent
int n = b[0].length; // decompositionBase
Scalar rA = randomScalar();
Scalar rC = randomScalar();
Scalar rD = randomScalar();
Scalar[][] a = new Scalar[m][n];
for(int j=0; j<m; j++) {
for(int i=1; i<n; i++) {
a[j][i] = randomScalar();
}
}
for(int j=0; j<m; j++) {
a[j][0] = Scalar.ZERO;
for(int i=1; i<n; i++) {
a[j][0] = a[j][0].sub(a[j][i]);
}
}
Ed25519GroupElement A = COMb(a, rA);
Scalar[][] c = new Scalar[m][n];
Scalar[][] d = new Scalar[m][n];
for(int j=0; j<m; j++) {
for(int i=0; i<n; i++) {
c[j][i] = a[j][i].mul(Scalar.ONE.sub(b[j][i].mul(Scalar.TWO)));
d[j][i] = a[j][i].sq().mul(Scalar.MINUS_ONE);
}
}
Ed25519GroupElement C = COMb(c, rC);
Ed25519GroupElement D = COMb(d, rD);
Scalar x = hashToScalar(concat(A.encode().getRaw(), C.encode().getRaw(), D.encode().getRaw()));
Scalar[][] f = new Scalar[m][n];
for(int j=0; j<m; j++) {
for(int i=0; i<n; i++) {
f[j][i] = b[j][i].mul(x).add(a[j][i]);
}
}
Scalar[][] fTrimmed = new Scalar[m][n-1];
for(int j=0; j<m; j++) {
for(int i=1; i<n; i++) {
fTrimmed[j][i-1] = f[j][i];
}
}
Scalar zA = r.mul(x).add(rA);
Scalar zC = rC.mul(x).add(rD);
return new Proof1(A, C, D, fTrimmed, zA, zC, a);
}
public static class Proof1 {
public Ed25519GroupElement A;
public Ed25519GroupElement C;
public Ed25519GroupElement D;
private Scalar[][] fTrimmed;
private Scalar zA;
private Scalar zC;
public transient Scalar[][] a;
private Proof1(Ed25519GroupElement A, Ed25519GroupElement C, Ed25519GroupElement D, Scalar[][] fTrimmed,
Scalar zA, Scalar zC, Scalar[][] a) {
this.A = A; this.C = C; this.D = D; this.fTrimmed = fTrimmed; this.zA = zA; this.zC = zC; this.a = a;
}
private byte[] toBytes(int decompositionBase, int decompositionExponent) {
byte[] result = concat(A.encode().getRaw(), C.encode().getRaw(), D.encode().getRaw());
for(int j=0; j<decompositionExponent; j++) {
for(int i=0; i<decompositionBase-1; i++) {
result = concat(result, fTrimmed[j][i].bytes);
}
}
result = concat(result, zA.bytes, zC.bytes);
return result;
}
}
public static Proof2 PROVE2(PointPair[] co, int iAsterisk, Scalar r, int inputs, int decompositionBase, int decompositionExponent) {
int ringSize = (int) Math.pow(decompositionBase, decompositionExponent);
Scalar[] u = new Scalar[decompositionExponent];
for(int k=0; k<decompositionExponent; k++) u[k] = randomScalar();
Scalar rB = randomScalar();
int[] iAsteriskSequence = nAryDecompose(decompositionBase, iAsterisk, decompositionExponent);
Scalar[][] d = new Scalar[decompositionExponent][decompositionBase];
for(int j=0; j<decompositionExponent; j++) {
for(int i=0; i<decompositionBase; i++) {
d[j][i] = Scalar.intToScalar(delta(iAsteriskSequence[j], i));
}
}
Ed25519GroupElement B = COMb(d, rB);
Proof1 P = PROVE1(d, rB);
Scalar[][] coefs = COEFS(P.a, iAsterisk);
PointPair[] G = new PointPair[decompositionExponent];
for(int k=0; k<decompositionExponent; k++) {
G[k] = ENCeg(Ed25519Group.ZERO_P3, u[k]);
for (int i = 0; i < ringSize; i++) {
G[k] = G[k].add(co[i].multiply(coefs[i][k]));
}
}
byte[] bytes = concat(P.A.encode().getRaw(), P.C.encode().getRaw(), P.D.encode().getRaw());
Scalar x1 = hashToScalar(bytes);
Scalar z = r.mul(x1.pow(decompositionExponent));
for(int i=decompositionExponent-1; i>=0; i--) {
z = z.sub(u[i].mul(x1.pow(i)));
}
return new Proof2(P, B, G, z);
}
public static class Proof2 {
Proof1 P;
public Ed25519GroupElement B;
public PointPair[] G;
public Scalar z;
private Proof2(Proof1 P, Ed25519GroupElement B, PointPair[] G, Scalar z) {
this.P = P;
this.B = B;
this.G = G;
this.z = z;
}
private byte[] toBytes(int decompositionBase, int decompositionExponent) {
byte[] bytes;
bytes = concat(P.toBytes(decompositionBase, decompositionExponent), B.encode().getRaw());
for(PointPair g : G) bytes = concat(bytes, g.toBytes());
bytes = concat(bytes, z.bytes);
return bytes;
}
}
private static int delta(int j, int i) {
return j==i ? 1 : 0;
}
private static int intPow(int a, int b) {
return (int) Math.round(Math.pow(a, b));
}
public static int[] nAryDecompose(int base, int n, int decompositionExponent) {
int[] r = new int[decompositionExponent];
for(int i=decompositionExponent-1; i>=0; i--) {
int basePow = intPow(base, i);
r[i] = n / basePow;
n-=basePow*r[i];
}
return r;
}
public static boolean VALID1(Ed25519GroupElement B, Proof1 P) {
boolean abcdOnCurve =
P.A.satisfiesCurveEquation()
&& B.satisfiesCurveEquation()
&& P.C.satisfiesCurveEquation()
&& P.D.satisfiesCurveEquation();
if(!abcdOnCurve) {
System.out.println("VALID1: ABCD not on curve");
return false;
}
int m = P.fTrimmed.length;
int n = P.fTrimmed[0].length + 1;
Scalar[][] f = new Scalar[m][n];
for(int j=0; j<m; j++) {
for(int i=1; i<n; i++) {
f[j][i] = P.fTrimmed[j][i-1];
}
}
Scalar x = hashToScalar(concat(P.A.encode().getRaw(), P.C.encode().getRaw(), P.D.encode().getRaw()));
for(int j=0; j<m; j++) {
f[j][0] = x;
for(int i=1; i<n; i++) {
f[j][0] = f[j][0].sub(f[j][i]);
}
}
Scalar[][] f1 = new Scalar[m][n];
for(int j=0; j<m; j++) {
for(int i=0; i<n; i++) {
f1[j][i] = f[j][i].mul(x.sub(f[j][i]));
}
}
for(int j=0; j<m; j++) {
Scalar colSum = x;
for(int i=1; i<n; i++) {
colSum = colSum.sub(f[j][i]);
}
if(!f[j][0].equals(colSum)) {
System.out.println("VALID1: FAILED For each j=0, ..., m-1, f[j][0] == x-f[j][1]-f[j][2]- ... -f[j][n-1]");
return false;
}
}
if(!B.toP3().scalarMultiply(x).toP3().add(P.A.toP3().toCached()).equals(COMb(f, P.zA))) {
System.out.println("VALID1: FAILED xB + A == COMp(f[0][0], ..., f[m-1][n-1]; z[A])");
return false;
}
if(!P.C.toP3().scalarMultiply(x).toP3().add(P.D.toP3().toCached()).equals(COMb(f1, P.zC))) {
System.out.println("VALID1: FAILED xC + D == COMp(f'[0][0], ..., f'[m-1][n-1]; z[C])");
return false;
}
return true;
}
public static boolean VALID2(int decompositionBase, Proof2 P1, PointPair[] co) {
boolean abcdOnCurve =
P1.P.A.satisfiesCurveEquation()
&& P1.B.satisfiesCurveEquation()
&& P1.P.C.satisfiesCurveEquation()
&& P1.P.D.satisfiesCurveEquation();
if(!abcdOnCurve) {
System.out.println("VALID2: FAILED: ABCD not on curve");
return false;
}
if(!VALID1(P1.B, P1.P)) {
System.out.println("VALID2: FAILED: VALID1 failed");
return false;
}
Scalar x1 = hashToScalar(concat(P1.P.A.encode().getRaw(), P1.P.C.encode().getRaw(), P1.P.D.encode().getRaw()));
int decompositionExponent = P1.P.fTrimmed.length;
Scalar[][] f = new Scalar[decompositionExponent][decompositionBase];
for(int j=0; j<decompositionExponent; j++) {
for(int i=1; i<decompositionBase; i++) {
f[j][i] = P1.P.fTrimmed[j][i-1];
}
}
int ringSize = (int) Math.pow(decompositionBase, decompositionExponent);
PointPair c = ENCeg(Ed25519Group.ZERO_P3, P1.z);
Scalar x = hashToScalar(concat(P1.P.A.encode().getRaw(), P1.P.C.encode().getRaw(), P1.P.D.encode().getRaw()));
for(int j=0; j<decompositionExponent; j++) {
f[j][0] = x;
for(int i=1; i<decompositionBase; i++) {
f[j][0] = f[j][0].sub(f[j][i]);
}
}
Scalar[] g = new Scalar[ringSize];
g[0] = f[0][0];
for(int j=1; j<decompositionExponent; j++) {
g[0] = g[0].mul(f[j][0]);
}
PointPair c1 = co[0].multiply(g[0]);
for(int i=1; i<ringSize; i++) {
int[] iSequence = nAryDecompose(decompositionBase, i, decompositionExponent);
g[i] = f[0][iSequence[0]];
for(int j=1; j<decompositionExponent; j++) {
g[i] = g[i].mul(f[j][iSequence[j]]);
}
c1 = c1.add(co[i].multiply(g[i]));
}
for(int k=0; k<decompositionExponent; k++) {
c1 = c1.subtract(P1.G[k].multiply(x1.pow(k)));
}
boolean result = c1.equals(c);
if(!result) {
System.out.println("VALID2: FAILED: c' != c");
System.out.println("c: (" + bytesToHex(c.P1.encode().getRaw()) + ", " + bytesToHex(c.P2.encode().getRaw()));
System.out.println("c': (" + bytesToHex(c1.P1.encode().getRaw()) + ", " + bytesToHex(c1.P2.encode().getRaw()));
}
return result;
}
public static boolean VER(Ed25519GroupElement[] ki, PointPair[][] pk, Ed25519GroupElement[] co, Ed25519GroupElement co1, byte[] M, SpendSignature spendSignature) {
F f = new F(ki, pk, co, co1, M);
SubResult cf1 = SUB(f);
if(!Multisignature.verify(concat(spendSignature.sigma1.toBytes(spendSignature.decompositionBase, spendSignature.decompositionExponent), f.toBytes()), ki, spendSignature.sigma2)) {
System.out.println("Multisignature.verify failed");
return false;
}
if(!VALID2(spendSignature.decompositionBase, spendSignature.sigma1, cf1.c)) {
System.out.println("VALID2 failed");
return false;
}
return true;
}
public static class Output {
public SK sk;
public Ed25519GroupElement ki;
public PointPair pk;
public Scalar mask;
public Ed25519GroupElement co;
public BigInteger amount;
public static Output genRandomOutput(BigInteger amount) {
Output o = new Output();
KeyGenResult keyGenResult = KEYGEN();
o.sk = keyGenResult.sk;
o.pk = keyGenResult.pk;
o.ki = keyGenResult.ki;
o.amount = amount;
o.mask = randomScalar();
o.co = COMp(new Scalar(o.amount), o.mask);
return o;
}
}
public static Scalar[][] COEFS(Scalar[][] a, int iAsterisk) {
int decompositionBase = a[0].length; // n
int decompositionExponent = a.length; // m
int ringSize = (int) Math.pow(decompositionBase, decompositionExponent); // N = n^m
int[] iAsteriskSequence = nAryDecompose(decompositionBase, iAsterisk, decompositionExponent);
Scalar[][] coefList = new Scalar[ringSize][decompositionExponent];
for(int k=0; k<ringSize; k++) {
int[] kSequence = nAryDecompose(decompositionBase, k, decompositionExponent);
coefList[k] = new Scalar[]{
a[0][kSequence[0]],
Scalar.intToScalar(delta(iAsteriskSequence[0], kSequence[0]))
};
for(int j=1; j<decompositionExponent; j++) {
coefList[k] = COEFPROD(coefList[k], new Scalar[]{
a[j][kSequence[j]],
Scalar.intToScalar(delta(iAsteriskSequence[j], kSequence[j]))
});
}
}
for(int k=0; k<ringSize; k++) {
coefList[k] = trimScalarArray(coefList[k], decompositionExponent, decompositionExponent);
}
return coefList;
}
private static Scalar[] trimScalarArray(Scalar[] a, int len, int indexWhere1ValueCanBeTrimmed) {
Scalar[] r = new Scalar[len];
for(int i=0; i<a.length; i++) {
if(i<len) r[i] = a[i];
else {
if(i==indexWhere1ValueCanBeTrimmed) {
if(!(a[i].equals(Scalar.ZERO) || a[i].equals(Scalar.ONE))) throw new RuntimeException("Attempt to trim non-zero or non-one in column " + i + ": value: " + a[i].toBigInteger());
}
else {
if(!(a[i].equals(Scalar.ZERO))) throw new RuntimeException("Attempt to trim non-zero in column " + i + ": value: " + a[i].toBigInteger());
}
}
}
return r;
}
public static Scalar[] COEFPROD(Scalar[] c, Scalar[] d) {
int maxLen = Math.max(c.length, d.length);
int resultLen = 2*maxLen-1;
BigInteger[] result = new BigInteger[resultLen];
for (int i = 0; i<resultLen; i++) result[i] = BigInteger.ZERO;
for (int i=0; i<maxLen; i++)
{
for (int j=0; j<maxLen; j++) {
result[i+j] = result[i+j].add(getBigIntegerAtArrayIndex(c, i).multiply(getBigIntegerAtArrayIndex(d, j)));
}
}
return bigIntegerArrayToScalarArray(result);
}
private static BigInteger getBigIntegerAtArrayIndex(Scalar[] a, int index) {
if(index>=a.length) return BigInteger.ZERO;
else return a[index].toBigInteger();
}
}

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package how.monero.hodl.ringSignature;
import how.monero.hodl.crypto.Scalar;
import org.nem.core.crypto.ed25519.arithmetic.Ed25519GroupElement;
import java.util.*;
import static how.monero.hodl.crypto.Scalar.randomScalar;
import static how.monero.hodl.util.ByteUtil.bytesToHex;
import static how.monero.hodl.util.ByteUtil.concat;
import static how.monero.hodl.crypto.CryptoUtil.*;
public class Multisignature {
public static Ed25519GroupElement[] lexicographicalSort(Ed25519GroupElement[] X) {
SortedMap<String, Ed25519GroupElement> hexToPoint = new TreeMap<>();
for(Ed25519GroupElement Xi : X) hexToPoint.put(bytesToHex(Xi.encode().getRaw()), Xi);
return hexToPoint.values().stream().toArray(Ed25519GroupElement[]::new);
}
/*
VER*: Take as input a message M, public keys L' = X[1], ..., X[n], and a
signature sigma = (R,s).
1) Compute L* = H(L')
2) For each i=1,2,...,n, compute c[i] = Hs(X[i], R, L*, M)
3) Accept if and only if sG = R + c[1]*X[1] + ... + c[n]*X[n]
*/
public static boolean verify(byte[] M, Ed25519GroupElement[] X, Signature signature) {
int n = X.length;
Scalar XAsterisk = hashToScalar(toBytes(lexicographicalSort(X)));
Scalar[] c = new Scalar[n];
for(int i=0; i<n; i++) {
c[i] = hashToScalar(concat(X[i].encode().getRaw(), signature.R.encode().getRaw(), XAsterisk.bytes, M));
}
Ed25519GroupElement sG = G.scalarMultiply(signature.s);
Ed25519GroupElement sG1 = signature.R;
for(int i=0; i<n; i++) sG1 = sG1.toP3().add(X[i].scalarMultiply(c[i]).toCached());
return sG.equals(sG1);
}
/*
SIG*: Take as input a message M and a list of private keys L = x[0], x[1],
..., x[n-1]. Let L' be the associated list of public keys X[0], ..., X[n-1], and
assume L' is lexicographically ordered.
1) Compute L* = H(L').
2) For each i=0,1,...,n-1, select r[i] at random from Zq.
3) Compute r=r[0]+r[1]+...+r[n-1] and R=rG.
4) For each i=0,1,...,n-1:
i) Compute c[i] := Hs(X[i], R, L*, M)
ii) Compute s[i] := r[i] + x[i]*c[i]
5) Compute s = s[1] + ... + s[n].
6) Output the signature sigma = (R, s)
*/
public static Signature sign(byte[] M, Scalar[] x, Ed25519GroupElement[] X) {
int n = x.length;
if(X==null) {
X = new Ed25519GroupElement[n];
for(int i=0; i<n; i++) {
X[i] = G.scalarMultiply(x[i]);
}
}
Scalar XAsterisk = hashToScalar(toBytes(lexicographicalSort(X)));
Scalar[] rArray = new Scalar[n];
for(int i=0; i<n; i++) rArray[i] = randomScalar();
Scalar r = sumArray(rArray);
Ed25519GroupElement R = G.scalarMultiply(r);
Scalar[] c = new Scalar[n];
Scalar[] sArray = new Scalar[n];
for(int i=0; i<n; i++) {
c[i] = hashToScalar(concat(X[i].encode().getRaw(), R.encode().getRaw(), XAsterisk.bytes, M));
sArray[i] = rArray[i].add(x[i].mul(c[i]));
}
Scalar s = sumArray(sArray);
return new Signature(R, s);
}
public static class Signature {
Ed25519GroupElement R;
Scalar s;
public Signature(Ed25519GroupElement R, Scalar s) {
this.R = R; this.s = s;
}
public byte[] toBytes() {
return concat(R.encode().getRaw(), s.bytes);
}
}
/*
KEYGEN*: Each user selects x at random from Zq. The secret key is x. The
public key is X=xG. Output (sk,pk) = (x,X).
*/
public static KeyPair keygen() {
Scalar x = randomScalar();
Ed25519GroupElement X = G.scalarMultiply(x);
return new KeyPair(x, X);
}
public static class KeyPair {
public Scalar x;
public Ed25519GroupElement X;
public KeyPair(Scalar x, Ed25519GroupElement X) {
this.x = x; this.X = X;
}
}
}

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package how.monero.hodl.ringSignature;
import how.monero.hodl.crypto.PointPair;
import how.monero.hodl.crypto.Scalar;
import org.nem.core.crypto.ed25519.arithmetic.Ed25519GroupElement;
public class SpendParams {
public int iAsterisk;
public PointPair[][] pk;
public BootleRuffing.SK[] sk;
public Ed25519GroupElement[] ki;
public Ed25519GroupElement[] co;
public byte[] M;
public Scalar s;
public int decompositionBase;
public int decompositionExponent;
}

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package how.monero.hodl.util;
import how.monero.hodl.crypto.Scalar;
public class ByteUtil {
public static String byteToHex(int v) {
byte[] array = new byte[1];
array[0] = (byte) v;
return bytesToHex(array);
}
final protected static char[] hexArray = "0123456789abcdef".toCharArray();
public static String bytesToHex(Scalar a) {
return bytesToHex(a.bytes);
}
public static String bytesToHex(byte[] bytes) {
char[] hexChars = new char[bytes.length * 2];
for ( int j = 0; j < bytes.length; j++ ) {
int v = bytes[j] & 0xFF;
hexChars[j * 2] = hexArray[v >>> 4];
hexChars[j * 2 + 1] = hexArray[v & 0x0F];
}
return new String(hexChars);
}
public static byte[] hexToBytes(String s) {
int len = s.length();
byte[] data = new byte[len / 2];
for (int i = 0; i < len; i += 2) {
data[i / 2] = (byte) ((Character.digit(s.charAt(i), 16) << 4)
+ Character.digit(s.charAt(i+1), 16));
}
return data;
}
public static void reverseByteArrayInPlace(byte[] array) {
for(int i = 0; i < array.length / 2; i++)
{
byte temp = array[i];
array[i] = array[array.length - i - 1];
array[array.length - i - 1] = temp;
}
}
public static byte[] concat(byte a, byte[] b) {
byte[] r = new byte[1+b.length];
r[0] = a;
System.arraycopy(b, 0, r, 1, b.length);
return r;
}
public static byte[] concat(byte[] a, byte[] b) {
byte[] r = new byte[a.length+b.length];
System.arraycopy(a, 0, r, 0, a.length);
System.arraycopy(b, 0, r, a.length, b.length);
return r;
}
public static byte[] concat(byte[] a, byte[] b, byte[] c) {
return concat(concat(a, b), c);
}
public static byte[] concat(byte[] a, byte[] b, byte[] c, byte[] d) {
return concat(concat(a, b), concat(c, d));
}
public static byte[] subarray(byte[] a, int start, int end) {
byte[] r = new byte[end-start];
System.arraycopy(a, start, r, 0, r.length);
return r;
}
public static byte[] xor(byte[] a, byte[] b) {
byte[] r = new byte[a.length];
for(int i=0; i<r.length; i++) r[i] = (byte) (a[i] ^ b[i]);
return r;
}
public static byte[] longToLittleEndianUint32ByteArray(long value) {
byte[] array = new byte[4];
for (int i=3; i>=0; i--) array[i] = (byte) (value >> i*8);
return array;
}
}

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source-code/RuffCT-java/src/how/monero/hodl/util/ExceptionAdapter.java Normal file
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package how.monero.hodl.util;
public class ExceptionAdapter {
public static RuntimeException toRuntimeException(Exception e) {
if(RuntimeException.class.isInstance(e)) return (RuntimeException) e;
else return new RuntimeException(e);
}
}

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source-code/RuffCT-java/src/how/monero/hodl/util/VarInt.java Normal file
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package how.monero.hodl.util;
public class VarInt {
public static byte[] writeVarInt(long value) {
byte[] data = new byte[8];
int pos = 0;
while ((value & 0xFFFFFF80) != 0L) {
data[pos] = (byte) ((value & 0x7F) | 0x80);
pos++;
value >>>= 7;
}
data[pos] = (byte) (value & 0x7F);
pos++;
byte[] result = new byte[pos];
System.arraycopy(data, 0, result, 0, pos);
return result;
}
public static long readVarInt(byte[] data) {
long result = 0;
int c = 0;
int pos = 0;
while(true) {
boolean isLastByteInVarInt = true;
int i = Byte.toUnsignedInt(data[pos]);
if(i>=128) {
isLastByteInVarInt = false;
i-=128;
}
result += Math.round(i * Math.pow(128, c));
c++;
pos++;
if(isLastByteInVarInt) break;
}
return result;
}
}

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source-code/RuffCT-java/src/org/nem/core/crypto/Curve.java Executable file
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package org.nem.core.crypto;
import java.math.BigInteger;
/**
* Interface for getting information for a curve.
*/
public interface Curve {
/**
* Gets the name of the curve.
*
* @return The name of the curve.
*/
String getName();
/**
* Gets the group order.
*
* @return The group order.
*/
BigInteger getGroupOrder();
/**
* Gets the group order / 2.
*
* @return The group order / 2.
*/
BigInteger getHalfGroupOrder();
}

41
source-code/RuffCT-java/src/org/nem/core/crypto/ed25519/Ed25519Curve.java Executable file
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package org.nem.core.crypto.ed25519;
import org.nem.core.crypto.ed25519.arithmetic.Ed25519Group;
import java.math.BigInteger;
/**
* Class that wraps the elliptic curve Ed25519.
*/
public class Ed25519Curve implements org.nem.core.crypto.Curve {
private static final Ed25519Curve ED25519;
static {
ED25519 = new Ed25519Curve();
}
@Override
public String getName() {
return "ed25519";
}
@Override
public BigInteger getGroupOrder() {
return Ed25519Group.GROUP_ORDER;
}
@Override
public BigInteger getHalfGroupOrder() {
return Ed25519Group.GROUP_ORDER.shiftRight(1);
}
/**
* Gets the Ed25519 instance.
*
* @return The Ed25519 instance.
*/
public static Ed25519Curve ed25519() {
return ED25519;
}
}

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source-code/RuffCT-java/src/org/nem/core/crypto/ed25519/arithmetic/CoordinateSystem.java Executable file
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package org.nem.core.crypto.ed25519.arithmetic;
/**
* Available coordinate systems for a group element.
*/
public enum CoordinateSystem {
/**
* Affine coordinate system (x, y).
*/
AFFINE,
/**
* Projective coordinate system (X:Y:Z) satisfying x=X/Z, y=Y/Z.
*/
P2,
/**
* Extended projective coordinate system (X:Y:Z:T) satisfying x=X/Z, y=Y/Z, XY=ZT.
*/
P3,
/**
* Completed coordinate system ((X:Z), (Y:T)) satisfying x=X/Z, y=Y/T.
*/
P1xP1,
/**
* Precomputed coordinate system (y+x, y-x, 2dxy).
*/
PRECOMPUTED,
/**
* Cached coordinate system (Y+X, Y-X, Z, 2dT).
*/
CACHED
}

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source-code/RuffCT-java/src/org/nem/core/crypto/ed25519/arithmetic/Ed25519EncodedFieldElement.java Executable file
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source-code/RuffCT-java/src/org/nem/core/crypto/ed25519/arithmetic/Ed25519EncodedGroupElement.java Executable file
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package org.nem.core.crypto.ed25519.arithmetic;
import org.nem.core.utils.ArrayUtils;
import java.util.Arrays;
public class Ed25519EncodedGroupElement {
private final byte[] values;
/**
* Creates a new encoded group element.
*
* @param values The values.
*/
public Ed25519EncodedGroupElement(final byte[] values) {
if (32 != values.length) {
throw new IllegalArgumentException("Invalid encoded group element.");
}
this.values = values;
}
/**
* Gets the underlying byte array.
*
* @return The byte array.
*/
public byte[] getRaw() {
return this.values;
}
/**
* Decodes this encoded group element and returns a new group element in P3 coordinates.
*
* @return The group element.
*/
public Ed25519GroupElement decode() {
final Ed25519FieldElement x = this.getAffineX();
final Ed25519FieldElement y = this.getAffineY();
return Ed25519GroupElement.p3(x, y, Ed25519Field.ONE, x.multiply(y));
}
/**
* Gets the affine x-coordinate.
* x is recovered in the following way (p = field size):
* <br>
* x = sign(x) * sqrt((y^2 - 1) / (d * y^2 + 1)) = sign(x) * sqrt(u / v) with u = y^2 - 1 and v = d * y^2 + 1.
* Setting β = (u * v^3) * (u * v^7)^((p - 5) / 8) one has β^2 = +-(u / v).
* If v * β = -u multiply β with i=sqrt(-1).
* Set x := β.
* If sign(x) != bit 255 of s then negate x.
*
* @return the affine x-coordinate.
*/
public Ed25519FieldElement getAffineX() {
Ed25519FieldElement x;
final Ed25519FieldElement y;
final Ed25519FieldElement ySquare;
final Ed25519FieldElement u;
final Ed25519FieldElement v;
final Ed25519FieldElement vxSquare;
Ed25519FieldElement checkForZero;
y = this.getAffineY();
ySquare = y.square();
// u = y^2 - 1
u = ySquare.subtract(Ed25519Field.ONE);
// v = d * y^2 + 1
v = ySquare.multiply(Ed25519Field.D).add(Ed25519Field.ONE);
// x = sqrt(u / v)
x = Ed25519FieldElement.sqrt(u, v);
vxSquare = x.square().multiply(v);
checkForZero = vxSquare.subtract(u);
if (checkForZero.isNonZero()) {
checkForZero = vxSquare.add(u);
if (checkForZero.isNonZero()) {
throw new IllegalArgumentException("not a valid Ed25519EncodedGroupElement.");
}
x = x.multiply(Ed25519Field.I);
}
if ((x.isNegative() ? 1 : 0) != ArrayUtils.getBit(this.values, 255)) {
x = x.negate();
}
return x;
}
/**
* Gets the affine y-coordinate.
*
* @return the affine y-coordinate.
*/
public Ed25519FieldElement getAffineY() {
// The affine y-coordinate is in bits 0 to 254.
// Since the decode() method of Ed25519EncodedFieldElement ignores bit 255,
// we can use that method without problems.
final Ed25519EncodedFieldElement encoded = new Ed25519EncodedFieldElement(this.values);
return encoded.decode();
}
@Override
public int hashCode() {
return Arrays.hashCode(this.values);
}
@Override
public boolean equals(final Object obj) {
if (!(obj instanceof Ed25519EncodedGroupElement)) {
return false;
}
final Ed25519EncodedGroupElement encoded = (Ed25519EncodedGroupElement)obj;
return 1 == ArrayUtils.isEqualConstantTime(this.values, encoded.values);
}
@Override
public String toString() {
return String.format(
"x=%s\ny=%s\n",
this.getAffineX().toString(),
this.getAffineY().toString());
}
}

43
source-code/RuffCT-java/src/org/nem/core/crypto/ed25519/arithmetic/Ed25519Field.java Executable file
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package org.nem.core.crypto.ed25519.arithmetic;
import org.nem.core.utils.*;
import java.math.BigInteger;
/**
* Represents the underlying finite field for Ed25519.
* The field has p = 2^255 - 19 elements.
*/
public class Ed25519Field {
/**
* P: 2^255 - 19
*/
public static final BigInteger P = new BigInteger(HexEncoder.getBytes("7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffed"));
public static final Ed25519FieldElement ZERO = getFieldElement(0);
public static final Ed25519FieldElement ONE = getFieldElement(1);
public static final Ed25519FieldElement TWO = getFieldElement(2);
public static final Ed25519FieldElement D = getD();
public static final Ed25519FieldElement D_Times_TWO = D.multiply(TWO);
public static final byte[] ZERO_SHORT = new byte[32];
public static final byte[] ZERO_LONG = new byte[64];
/**
* I ^ 2 = -1
*/
public static final Ed25519FieldElement I = new Ed25519EncodedFieldElement(HexEncoder.getBytes(
"b0a00e4a271beec478e42fad0618432fa7d7fb3d99004d2b0bdfc14f8024832b")).decode();
private static Ed25519FieldElement getFieldElement(final int value) {
final int[] f = new int[10];
f[0] = value;
return new Ed25519FieldElement(f);
}
private static Ed25519FieldElement getD() {
final BigInteger d = new BigInteger("-121665")
.multiply(new BigInteger("121666").modInverse(Ed25519Field.P))
.mod(Ed25519Field.P);
return new Ed25519EncodedFieldElement(ArrayUtils.toByteArray(d, 32)).decode();
}
}

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source-code/RuffCT-java/src/org/nem/core/crypto/ed25519/arithmetic/Ed25519FieldElement.java Executable file
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source-code/RuffCT-java/src/org/nem/core/crypto/ed25519/arithmetic/Ed25519Group.java Executable file
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package org.nem.core.crypto.ed25519.arithmetic;
import org.nem.core.utils.HexEncoder;
import java.math.BigInteger;
/**
* Represents the underlying group for Ed25519.
*/
public class Ed25519Group {
/**
* 2^252 - 27742317777372353535851937790883648493
*/
public static final BigInteger GROUP_ORDER = BigInteger.ONE.shiftLeft(252).add(new BigInteger("27742317777372353535851937790883648493"));
/**
* <pre>{@code
* (x, 4/5); x > 0
* }</pre>
*/
public static final Ed25519GroupElement BASE_POINT = getBasePoint();
// different representations of zero
public static final Ed25519GroupElement ZERO_P3 = Ed25519GroupElement.p3(Ed25519Field.ZERO, Ed25519Field.ONE, Ed25519Field.ONE, Ed25519Field.ZERO);
public static final Ed25519GroupElement ZERO_P2 = Ed25519GroupElement.p2(Ed25519Field.ZERO, Ed25519Field.ONE, Ed25519Field.ONE);
public static final Ed25519GroupElement ZERO_PRECOMPUTED = Ed25519GroupElement.precomputed(Ed25519Field.ONE, Ed25519Field.ONE, Ed25519Field.ZERO);
private static Ed25519GroupElement getBasePoint() {
final byte[] rawEncodedGroupElement = HexEncoder.getBytes("5866666666666666666666666666666666666666666666666666666666666666");
final Ed25519GroupElement basePoint = new Ed25519EncodedGroupElement(rawEncodedGroupElement).decode();
basePoint.precomputeForScalarMultiplication();
basePoint.precomputeForDoubleScalarMultiplication();
return basePoint;
}
}

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source-code/RuffCT-java/src/org/nem/core/utils/AbstractTwoLevelMap.java Executable file
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package org.nem.core.utils;
import java.util.*;
import java.util.concurrent.ConcurrentHashMap;
/**
* A two-level map of items.
* <br>
* Items are automatically created on access.
* Item associations are order-dependent.
*/
public abstract class AbstractTwoLevelMap<TKey, TValue> {
private final Map<TKey, Map<TKey, TValue>> impl = new ConcurrentHashMap<>();
/**
* Gets the TValue associated with key1 and key2.
*
* @param key1 The first key.
* @param key2 The second key.
* @return The value associated with key and key2.
*/
public TValue getItem(final TKey key1, final TKey key2) {
final Map<TKey, TValue> keyOneValues = this.getItems(key1);
TValue value = keyOneValues.get(key2);
if (null == value) {
value = this.createValue();
keyOneValues.put(key2, value);
}
return value;
}
/**
* Gets the (TKey, TValue) map associated with key.
*
* @param key The first key.
* @return The map associated with key.
*/
public Map<TKey, TValue> getItems(final TKey key) {
Map<TKey, TValue> keyValues = this.impl.get(key);
if (null == keyValues) {
keyValues = new ConcurrentHashMap<>();
this.impl.put(key, keyValues);
}
return keyValues;
}
/**
* Removes a key from the map.
*
* @param key The key to remove.
*/
public void remove(final TKey key) {
this.impl.remove(key);
}
/**
* Gets the key set of this map.
*
* @return The key set.
*/
public Set<TKey> keySet() {
return this.impl.keySet();
}
/**
* Creates a new blank value.
*
* @return A new value.
*/
protected abstract TValue createValue();
}

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source-code/RuffCT-java/src/org/nem/core/utils/ArrayUtils.java Executable file
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package org.nem.core.utils;
import java.math.BigInteger;
/**
* Static class that contains a handful of array helper functions.
*/
public class ArrayUtils {
/**
* Creates duplicate of given array
*
* @param src The array to duplicate.
* @return A copy of the array.
*/
public static byte[] duplicate(final byte[] src) {
final byte[] result = new byte[src.length];
System.arraycopy(src, 0, result, 0, src.length);
return result;
}
/**
* Concatenates byte arrays and returns the result.
*
* @param arrays The arrays.
* @return A single array containing all elements in all arrays.
*/
public static byte[] concat(final byte[]... arrays) {
int totalSize = 0;
for (final byte[] array : arrays) {
totalSize += array.length;
}
int startIndex = 0;
final byte[] result = new byte[totalSize];
for (final byte[] array : arrays) {
System.arraycopy(array, 0, result, startIndex, array.length);
startIndex += array.length;
}
return result;
}
/**
* Splits a single array into two arrays.
*
* @param bytes The input array.
* @param splitIndex The index at which the array should be split.
* @return Two arrays split at the splitIndex.
* The first array will contain the first splitIndex elements.
* The second array will contain all trailing elements.
*/
public static byte[][] split(final byte[] bytes, final int splitIndex) {
if (splitIndex < 0 || bytes.length < splitIndex) {
throw new IllegalArgumentException("split index is out of range");
}
final byte[] lhs = new byte[splitIndex];
final byte[] rhs = new byte[bytes.length - splitIndex];
System.arraycopy(bytes, 0, lhs, 0, lhs.length);
System.arraycopy(bytes, splitIndex, rhs, 0, rhs.length);
return new byte[][] { lhs, rhs };
}
/**
* Converts a BigInteger to a little endian byte array.
*
* @param value The value to convert.
* @param numBytes The number of bytes in the destination array.
* @return The resulting little endian byte array.
*/
public static byte[] toByteArray(final BigInteger value, final int numBytes) {
final byte[] outputBytes = new byte[numBytes];
final byte[] bigIntegerBytes = value.toByteArray();
int copyStartIndex = (0x00 == bigIntegerBytes[0]) ? 1 : 0;
int numBytesToCopy = bigIntegerBytes.length - copyStartIndex;
if (numBytesToCopy > numBytes) {
copyStartIndex += numBytesToCopy - numBytes;
numBytesToCopy = numBytes;
}
for (int i = 0; i < numBytesToCopy; ++i) {
outputBytes[i] = bigIntegerBytes[copyStartIndex + numBytesToCopy - i - 1];
}
return outputBytes;
}
/**
* Converts a little endian byte array to a BigInteger.
*
* @param bytes The bytes to convert.
* @return The resulting BigInteger.
*/
public static BigInteger toBigInteger(final byte[] bytes) {
final byte[] bigEndianBytes = new byte[bytes.length + 1];
for (int i = 0; i < bytes.length; ++i) {
bigEndianBytes[i + 1] = bytes[bytes.length - i - 1];
}
return new BigInteger(bigEndianBytes);
}
/**
* Constant-time byte[] comparison. The constant time behavior eliminates side channel attacks.
*
* @param b An array.
* @param c An array.
* @return 1 if b and c are equal, 0 otherwise.
*/
public static int isEqualConstantTime(final byte[] b, final byte[] c) {
int result = 0;
result |= b.length - c.length;
for (int i = 0; i < b.length; i++) {
result |= b[i] ^ c[i];
}
return ByteUtils.isEqualConstantTime(result, 0);
}
/**
* NON constant-time lexicographical byte[] comparison.
*
* @param b first of arrays to compare.
* @param c second of arrays to compare.
* @return 1, -1, or 0 depending on comparison result.
*/
public static int compare(final byte[] b, final byte[] c) {
int result = b.length - c.length;
if (0 != result) {
return result;
}
for (int i = 0; i < b.length; i++) {
result = b[i] - c[i];
if (0 != result) {
return result;
}
}
return 0;
}
/**
* Gets the i'th bit of a byte array.
*
* @param h The byte array.
* @param i The bit index.
* @return The value of the i'th bit in h
*/
public static int getBit(final byte[] h, final int i) {
return (h[i >> 3] >> (i & 7)) & 1;
}
}

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source-code/RuffCT-java/src/org/nem/core/utils/Base32Encoder.java Executable file
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package org.nem.core.utils;
import org.apache.commons.codec.binary.Base32;
/**
* Static class that contains utility functions for converting Base32 strings to and from bytes.
*/
public class Base32Encoder {
/**
* Converts a string to a byte array.
*
* @param base32String The input Base32 string.
* @return The output byte array.
*/
public static byte[] getBytes(final String base32String) {
final Base32 codec = new Base32();
final byte[] encodedBytes = StringEncoder.getBytes(base32String);
if (!codec.isInAlphabet(encodedBytes, true)) {
throw new IllegalArgumentException("malformed base32 string passed to getBytes");
}
return codec.decode(encodedBytes);
}
/**
* Converts a byte array to a Base32 string.
*
* @param bytes The input byte array.
* @return The output Base32 string.
*/
public static String getString(final byte[] bytes) {
final Base32 codec = new Base32();
final byte[] decodedBytes = codec.encode(bytes);
return StringEncoder.getString(decodedBytes);
}
}

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source-code/RuffCT-java/src/org/nem/core/utils/Base64Encoder.java Executable file
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package org.nem.core.utils;
import org.apache.commons.codec.binary.Base64;
/**
* Static class that contains utility functions for converting Base64 strings to and from bytes.
*/
public class Base64Encoder {
/**
* Converts a string to a byte array.
*
* @param base64String The input Base64 string.
* @return The output byte array.
*/
public static byte[] getBytes(final String base64String) {
final Base64 codec = new Base64();
final byte[] encodedBytes = StringEncoder.getBytes(base64String);
if (!codec.isInAlphabet(encodedBytes, true)) {
throw new IllegalArgumentException("malformed base64 string passed to getBytes");
}
return codec.decode(encodedBytes);
}
/**
* Converts a byte array to a Base64 string.
*
* @param bytes The input byte array.
* @return The output Base64 string.
*/
public static String getString(final byte[] bytes) {
final Base64 codec = new Base64();
final byte[] decodedBytes = codec.encode(bytes);
return StringEncoder.getString(decodedBytes);
}
}

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source-code/RuffCT-java/src/org/nem/core/utils/ByteUtils.java Executable file
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package org.nem.core.utils;
import java.nio.ByteBuffer;
public class ByteUtils {
/**
* Converts an array of 8 bytes into a long.
*
* @param bytes The bytes.
* @return The long.
*/
public static long bytesToLong(final byte[] bytes) {
final ByteBuffer buffer = ByteBuffer.allocate(8);
buffer.put(bytes, 0, 8);
buffer.flip();
return buffer.getLong();
}
/**
* Converts a long value into an array of 8 bytes.
*
* @param x The long.
* @return The bytes.
*/
public static byte[] longToBytes(final long x) {
final ByteBuffer buffer = ByteBuffer.allocate(8);
buffer.putLong(x);
return buffer.array();
}
/**
* Converts an array of 4 bytes into a int.
*
* @param bytes The bytes.
* @return The int.
*/
public static int bytesToInt(final byte[] bytes) {
final ByteBuffer buffer = ByteBuffer.allocate(4);
buffer.put(bytes, 0, 4);
buffer.flip();
return buffer.getInt();
}
/**
* Converts an int value into an array of 4 bytes.
*
* @param x The int.
* @return The bytes.
*/
public static byte[] intToBytes(final int x) {
final ByteBuffer buffer = ByteBuffer.allocate(4);
buffer.putInt(x);
return buffer.array();
}
/**
* Constant-time byte comparison. The constant time behavior eliminates side channel attacks.
*
* @param b One byte.
* @param c Another byte.
* @return 1 if b and c are equal, 0 otherwise.
*/
public static int isEqualConstantTime(final int b, final int c) {
int result = 0;
final int xor = b ^ c;
for (int i = 0; i < 8; i++) {
result |= xor >> i;
}
return (result ^ 0x01) & 0x01;
}
/**
* Constant-time check if byte is negative. The constant time behavior eliminates side channel attacks.
*
* @param b The byte to check.
* @return 1 if the byte is negative, 0 otherwise.
*/
public static int isNegativeConstantTime(final int b) {
return (b >> 8) & 1;
}
/**
* Creates a human readable representation of an array of bytes.
*
* @param bytes The bytes.
* @return An string representation of the bytes.
*/
public static String toString(final byte[] bytes) {
final StringBuilder builder = new StringBuilder();
builder.append("{ ");
for (final byte b : bytes) {
builder.append(String.format("%02X ", (byte)(0xFF & b)));
}
builder.append("}");
return builder.toString();
}
}

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source-code/RuffCT-java/src/org/nem/core/utils/CircularStack.java Executable file
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package org.nem.core.utils;
import java.util.*;
/**
* Circular stack is a last in first out buffer with fixed size that replace its oldest element if full.
* The removal order is inverse of insertion order. The iteration order is the same as insertion order.
* <strong>Note that implementation is not synchronized.</strong>
*
* @param <E> Type of elements on the stack.
*/
public class CircularStack<E> implements Iterable<E> {
private final List<E> elements;
private final int limit;
/**
* Creates circular stack with at most limit elements.
*
* @param limit Maximum number of elements on the stack.
*/
public CircularStack(final int limit) {
this.elements = new ArrayList<>(limit);
this.limit = limit;
}
/**
* Creates shallow copy in destination.
*
* @param destination CircularStack to which elements should be copied.
*/
public void shallowCopyTo(final CircularStack<E> destination) {
destination.elements.clear();
destination.pushAll(this);
}
private void pushAll(final CircularStack<E> rhs) {
int i = 0;
for (final E element : rhs) {
if (i >= rhs.size() - this.limit) {
this.push(element);
}
++i;
}
}
/**
* Adds element to the stack.
*
* @param element Element to be added.
*/
public void push(final E element) {
this.elements.add(element);
if (this.elements.size() > this.limit) {
this.elements.remove(0);
}
}
/**
* Gets most recently added element.
*
* @return Most recently added element.
*/
public E peek() {
return this.elements.get(this.elements.size() - 1);
}
/**
* Removes most recently added element.
*/
public void pop() {
this.elements.remove(this.elements.size() - 1);
}
/**
* Returns size of a stack.
*
* @return Size of a stack (can be smaller than limit).
*/
public int size() {
return this.elements.size();
}
@Override
public Iterator<E> iterator() {
return this.elements.iterator();
}
}

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package org.nem.core.utils;
import java.util.concurrent.*;
import java.util.function.Function;
/**
* Static class that contains helper functions for dealing with exceptions.
*/
public class ExceptionUtils {
private ExceptionUtils() {
}
/**
* Interface that mimics Runnable but can additionally throw checked exceptions.
*/
public interface CheckedRunnable {
/**
* Executes the runnable.
*
* @throws Exception Any exception.
*/
void call() throws Exception;
}
/**
* Propagates checked exceptions as a runtime exception.
*
* @param runnable The checked runnable.
*/
public static void propagateVoid(final CheckedRunnable runnable) {
propagateVoid(runnable, RuntimeException::new);
}
/**
* Propagates checked exceptions as a specific runtime exception.
*
* @param runnable The checked runnable.
* @param wrap A function that wraps an exception in a runtime exception.
* @param <E> The specific exception type.
*/
public static <E extends RuntimeException> void propagateVoid(
final CheckedRunnable runnable,
final Function<Exception, E> wrap) {
propagate(new CheckedRuntimeToCallableAdapter(runnable), wrap);
}
/**
* Propagates checked exceptions as a runtime exception.
*
* @param callable The function.
* @param <T> The function return type.
* @return The function result.
*/
public static <T> T propagate(final Callable<T> callable) {
return propagate(callable, RuntimeException::new);
}
/**
* Propagates checked exceptions as a specific runtime exception.
*
* @param callable The function.
* @param wrap A function that wraps an exception in a runtime exception.
* @param <T> The function return type.
* @param <E> The specific exception type.
* @return The function result.
*/
public static <T, E extends RuntimeException> T propagate(
final Callable<T> callable,
final Function<Exception, E> wrap) {
try {
return callable.call();
} catch (final ExecutionException e) {
if (RuntimeException.class.isAssignableFrom(e.getCause().getClass())) {
throw (RuntimeException)e.getCause();
}
throw wrap.apply(e);
} catch (final RuntimeException e) {
throw e;
} catch (final InterruptedException e) {
Thread.currentThread().interrupt();
throw new IllegalStateException(e);
} catch (final Exception e) {
throw wrap.apply(e);
}
}
private static class CheckedRuntimeToCallableAdapter implements Callable<Void> {
private final CheckedRunnable runnable;
public CheckedRuntimeToCallableAdapter(final CheckedRunnable runnable) {
this.runnable = runnable;
}
@Override
public Void call() throws Exception {
this.runnable.call();
return null;
}
}
}

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package org.nem.core.utils;
import java.text.*;
import java.util.Arrays;
/**
* Static class containing helper functions for formatting.
*/
public class FormatUtils {
/**
* Gets a default decimal format that should be used for formatting decimal values.
*
* @return A default decimal format.
*/
public static DecimalFormat getDefaultDecimalFormat() {
final DecimalFormatSymbols decimalFormatSymbols = new DecimalFormatSymbols();
decimalFormatSymbols.setDecimalSeparator('.');
final DecimalFormat format = new DecimalFormat("#0.000", decimalFormatSymbols);
format.setGroupingUsed(false);
return format;
}
/**
* Gets a decimal format that with the desired number of decimal places.
*
* @param decimalPlaces The number of decimal places.
* @return The desired decimal format.
*/
public static DecimalFormat getDecimalFormat(final int decimalPlaces) {
if (decimalPlaces < 0) {
throw new IllegalArgumentException("decimalPlaces must be non-negative");
}
final DecimalFormatSymbols decimalFormatSymbols = new DecimalFormatSymbols();
decimalFormatSymbols.setDecimalSeparator('.');
final StringBuilder builder = new StringBuilder();
builder.append("#0");
if (decimalPlaces > 0) {
builder.append('.');
final char[] zeros = new char[decimalPlaces];
Arrays.fill(zeros, '0');
builder.append(zeros);
}
final DecimalFormat format = new DecimalFormat(builder.toString(), decimalFormatSymbols);
format.setGroupingUsed(false);
return format;
}
/**
* Formats a double value with a given number of decimal places.
*
* @param value The value to format.
* @param decimalPlaces The desired number of decimal places.
* @return The formatted string.
*/
public static String format(final double value, final int decimalPlaces) {
final DecimalFormat formatter = getDecimalFormat(decimalPlaces);
return formatter.format(value);
}
}

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package org.nem.core.utils;
import org.apache.commons.codec.DecoderException;
import org.apache.commons.codec.binary.Hex;
/**
* Static class that contains utility functions for converting hex strings to and from bytes.
*/
public class HexEncoder {
/**
* Converts a hex string to a byte array.
*
* @param hexString The input hex string.
* @return The output byte array.
*/
public static byte[] getBytes(final String hexString) {
try {
return getBytesInternal(hexString);
} catch (final DecoderException e) {
throw new IllegalArgumentException(e);
}
}
/**
* Tries to convert a hex string to a byte array.
*
* @param hexString The input hex string.
* @return The output byte array or null if the input string is malformed.
*/
public static byte[] tryGetBytes(final String hexString) {
try {
return getBytesInternal(hexString);
} catch (final DecoderException e) {
return null;
}
}
private static byte[] getBytesInternal(final String hexString) throws DecoderException {
final Hex codec = new Hex();
final String paddedHexString = 0 == hexString.length() % 2 ? hexString : "0" + hexString;
final byte[] encodedBytes = StringEncoder.getBytes(paddedHexString);
return codec.decode(encodedBytes);
}
/**
* Converts a byte array to a hex string.
*
* @param bytes The input byte array.
* @return The output hex string.
*/
public static String getString(final byte[] bytes) {
final Hex codec = new Hex();
final byte[] decodedBytes = codec.encode(bytes);
return StringEncoder.getString(decodedBytes);
}
}

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package org.nem.core.utils;
/* We don't want to get spring dependancy just to get this... */
/*
* Copyright 2002-2014 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* Java 5 enumeration of HTTP status codes.
*
* @author Arjen Poutsma
* @author Sebastien Deleuze
* @see <a href="http://www.iana.org/assignments/http-status-codes">HTTP Status Code Registry</a>
* @see <a href="http://en.wikipedia.org/wiki/List_of_HTTP_status_codes">List of HTTP status codes - Wikipedia</a>
*/
public enum HttpStatus {
// 1xx Informational
/**
* {@code 100 Continue}.
*
* @see <a href="http://tools.ietf.org/html/rfc7231#section-6.2.1">HTTP/1.1: Semantics and Content, section 6.2.1</a>
*/
CONTINUE(100, "Continue"),
/**
* {@code 101 Switching Protocols}.
*
* @see <a href="http://tools.ietf.org/html/rfc7231#section-6.2.2">HTTP/1.1: Semantics and Content, section 6.2.2</a>
*/
SWITCHING_PROTOCOLS(101, "Switching Protocols"),
/**
* {@code 102 Processing}.
*
* @see <a href="http://tools.ietf.org/html/rfc2518#section-10.1">WebDAV</a>
*/
PROCESSING(102, "Processing"),
/**
* {@code 103 Checkpoint}.
*
* @see <a href="http://code.google.com/p/gears/wiki/ResumableHttpRequestsProposal">A proposal for supporting
* resumable POST/PUT HTTP requests in HTTP/1.0</a>
*/
CHECKPOINT(103, "Checkpoint"),
// 2xx Success
/**
* {@code 200 OK}.
*
* @see <a href="http://tools.ietf.org/html/rfc7231#section-6.3.1">HTTP/1.1: Semantics and Content, section 6.3.1</a>
*/
OK(200, "OK"),
/**
* {@code 201 Created}.
*
* @see <a href="http://tools.ietf.org/html/rfc7231#section-6.3.2">HTTP/1.1: Semantics and Content, section 6.3.2</a>
*/
CREATED(201, "Created"),
/**
* {@code 202 Accepted}.
*
* @see <a href="http://tools.ietf.org/html/rfc7231#section-6.3.3">HTTP/1.1: Semantics and Content, section 6.3.3</a>
*/
ACCEPTED(202, "Accepted"),
/**
* {@code 203 Non-Authoritative Information}.
*
* @see <a href="http://tools.ietf.org/html/rfc7231#section-6.3.4">HTTP/1.1: Semantics and Content, section 6.3.4</a>
*/
NON_AUTHORITATIVE_INFORMATION(203, "Non-Authoritative Information"),
/**
* {@code 204 No Content}.
*
* @see <a href="http://tools.ietf.org/html/rfc7231#section-6.3.5">HTTP/1.1: Semantics and Content, section 6.3.5</a>
*/
NO_CONTENT(204, "No Content"),
/**
* {@code 205 Reset Content}.
*
* @see <a href="http://tools.ietf.org/html/rfc7231#section-6.3.6">HTTP/1.1: Semantics and Content, section 6.3.6</a>
*/
RESET_CONTENT(205, "Reset Content"),
/**
* {@code 206 Partial Content}.
*
* @see <a href="http://tools.ietf.org/html/rfc7233#section-4.1">HTTP/1.1: Range Requests, section 4.1</a>
*/
PARTIAL_CONTENT(206, "Partial Content"),
/**
* {@code 207 Multi-Status}.
*
* @see <a href="http://tools.ietf.org/html/rfc4918#section-13">WebDAV</a>
*/
MULTI_STATUS(207, "Multi-Status"),
/**
* {@code 208 Already Reported}.
*
* @see <a href="http://tools.ietf.org/html/rfc5842#section-7.1">WebDAV Binding Extensions</a>
*/
ALREADY_REPORTED(208, "Already Reported"),
/**
* {@code 226 IM Used}.
*
* @see <a href="http://tools.ietf.org/html/rfc3229#section-10.4.1">Delta encoding in HTTP</a>
*/
IM_USED(226, "IM Used"),
// 3xx Redirection
/**
* {@code 300 Multiple Choices}.
*
* @see <a href="http://tools.ietf.org/html/rfc7231#section-6.4.1">HTTP/1.1: Semantics and Content, section 6.4.1</a>
*/
MULTIPLE_CHOICES(300, "Multiple Choices"),
/**
* {@code 301 Moved Permanently}.
*
* @see <a href="http://tools.ietf.org/html/rfc7231#section-6.4.2">HTTP/1.1: Semantics and Content, section 6.4.2</a>
*/
MOVED_PERMANENTLY(301, "Moved Permanently"),
/**
* {@code 302 Found}.
*
* @see <a href="http://tools.ietf.org/html/rfc7231#section-6.4.3">HTTP/1.1: Semantics and Content, section 6.4.3</a>
*/
FOUND(302, "Found"),
/**
* {@code 302 Moved Temporarily}.
*
* @see <a href="http://tools.ietf.org/html/rfc1945#section-9.3">HTTP/1.0, section 9.3</a>
* @deprecated In favor of {@link #FOUND} which will be returned from {@code HttpStatus.valueOf(302)}
*/
@Deprecated
MOVED_TEMPORARILY(302, "Moved Temporarily"),
/**
* {@code 303 See Other}.
*
* @see <a href="http://tools.ietf.org/html/rfc7231#section-6.4.4">HTTP/1.1: Semantics and Content, section 6.4.4</a>
*/
SEE_OTHER(303, "See Other"),
/**
* {@code 304 Not Modified}.
*
* @see <a href="http://tools.ietf.org/html/rfc7232#section-4.1">HTTP/1.1: Conditional Requests, section 4.1</a>
*/
NOT_MODIFIED(304, "Not Modified"),
/**
* {@code 305 Use Proxy}.
*
* @see <a href="http://tools.ietf.org/html/rfc7231#section-6.4.5">HTTP/1.1: Semantics and Content, section 6.4.5</a>
* @deprecated due to security concerns regarding in-band configuration of a proxy
*/
@Deprecated
USE_PROXY(305, "Use Proxy"),
/**
* {@code 307 Temporary Redirect}.
*
* @see <a href="http://tools.ietf.org/html/rfc7231#section-6.4.7">HTTP/1.1: Semantics and Content, section 6.4.7</a>
*/
TEMPORARY_REDIRECT(307, "Temporary Redirect"),
/**
* {@code 308 Permanent Redirect}.
*
* @see <a href="http://tools.ietf.org/html/rfc7238">RFC 7238</a>
*/
PERMANENT_REDIRECT(308, "Permanent Redirect"),
// --- 4xx Client Error ---
/**
* {@code 400 Bad Request}.
*
* @see <a href="http://tools.ietf.org/html/rfc7231#section-6.5.1">HTTP/1.1: Semantics and Content, section 6.5.1</a>
*/
BAD_REQUEST(400, "Bad Request"),
/**
* {@code 401 Unauthorized}.
*
* @see <a href="http://tools.ietf.org/html/rfc7235#section-3.1">HTTP/1.1: Authentication, section 3.1</a>
*/
UNAUTHORIZED(401, "Unauthorized"),
/**
* {@code 402 Payment Required}.
*
* @see <a href="http://tools.ietf.org/html/rfc7231#section-6.5.2">HTTP/1.1: Semantics and Content, section 6.5.2</a>
*/
PAYMENT_REQUIRED(402, "Payment Required"),
/**
* {@code 403 Forbidden}.
*
* @see <a href="http://tools.ietf.org/html/rfc7231#section-6.5.3">HTTP/1.1: Semantics and Content, section 6.5.3</a>
*/
FORBIDDEN(403, "Forbidden"),
/**
* {@code 404 Not Found}.
*
* @see <a href="http://tools.ietf.org/html/rfc7231#section-6.5.4">HTTP/1.1: Semantics and Content, section 6.5.4</a>
*/
NOT_FOUND(404, "Not Found"),
/**
* {@code 405 Method Not Allowed}.
*
* @see <a href="http://tools.ietf.org/html/rfc7231#section-6.5.5">HTTP/1.1: Semantics and Content, section 6.5.5</a>
*/
METHOD_NOT_ALLOWED(405, "Method Not Allowed"),
/**
* {@code 406 Not Acceptable}.
*
* @see <a href="http://tools.ietf.org/html/rfc7231#section-6.5.6">HTTP/1.1: Semantics and Content, section 6.5.6</a>
*/
NOT_ACCEPTABLE(406, "Not Acceptable"),
/**
* {@code 407 Proxy Authentication Required}.
*
* @see <a href="http://tools.ietf.org/html/rfc7235#section-3.2">HTTP/1.1: Authentication, section 3.2</a>
*/
PROXY_AUTHENTICATION_REQUIRED(407, "Proxy Authentication Required"),
/**
* {@code 408 Request Timeout}.
*
* @see <a href="http://tools.ietf.org/html/rfc7231#section-6.5.7">HTTP/1.1: Semantics and Content, section 6.5.7</a>
*/
REQUEST_TIMEOUT(408, "Request Timeout"),
/**
* {@code 409 Conflict}.
*
* @see <a href="http://tools.ietf.org/html/rfc7231#section-6.5.8">HTTP/1.1: Semantics and Content, section 6.5.8</a>
*/
CONFLICT(409, "Conflict"),
/**
* {@code 410 Gone}.
*
* @see <a href="http://tools.ietf.org/html/rfc7231#section-6.5.9">HTTP/1.1: Semantics and Content, section 6.5.9</a>
*/
GONE(410, "Gone"),
/**
* {@code 411 Length Required}.
*
* @see <a href="http://tools.ietf.org/html/rfc7231#section-6.5.10">HTTP/1.1: Semantics and Content, section 6.5.10</a>
*/
LENGTH_REQUIRED(411, "Length Required"),
/**
* {@code 412 Precondition failed}.
*
* @see <a href="http://tools.ietf.org/html/rfc7232#section-4.2">HTTP/1.1: Conditional Requests, section 4.2</a>
*/
PRECONDITION_FAILED(412, "Precondition Failed"),
/**
* {@code 413 Payload Too Large}.
*
* @see <a href="http://tools.ietf.org/html/rfc7231#section-6.5.11">HTTP/1.1: Semantics and Content, section 6.5.11</a>
* @since 4.1
*/
PAYLOAD_TOO_LARGE(413, "Payload Too Large"),
/**
* {@code 413 Request Entity Too Large}.
*
* @see <a href="http://tools.ietf.org/html/rfc2616#section-10.4.14">HTTP/1.1, section 10.4.14</a>
* @deprecated In favor of {@link #PAYLOAD_TOO_LARGE} which will be returned from {@code HttpStatus.valueOf(413)}
*/
@Deprecated
REQUEST_ENTITY_TOO_LARGE(413, "Request Entity Too Large"),
/**
* {@code 414 URI Too Long}.
*
* @see <a href="http://tools.ietf.org/html/rfc7231#section-6.5.12">HTTP/1.1: Semantics and Content, section 6.5.12</a>
* @since 4.1
*/
URI_TOO_LONG(414, "URI Too Long"),
/**
* {@code 414 Request-URI Too Long}.
*
* @see <a href="http://tools.ietf.org/html/rfc2616#section-10.4.15">HTTP/1.1, section 10.4.15</a>
* @deprecated In favor of {@link #URI_TOO_LONG} which will be returned from {@code HttpStatus.valueOf(414)}
*/
@Deprecated
REQUEST_URI_TOO_LONG(414, "Request-URI Too Long"),
/**
* {@code 415 Unsupported Media Type}.
*
* @see <a href="http://tools.ietf.org/html/rfc7231#section-6.5.13">HTTP/1.1: Semantics and Content, section 6.5.13</a>
*/
UNSUPPORTED_MEDIA_TYPE(415, "Unsupported Media Type"),
/**
* {@code 416 Requested Range Not Satisfiable}.
*
* @see <a href="http://tools.ietf.org/html/rfc7233#section-4.4">HTTP/1.1: Range Requests, section 4.4</a>
*/
REQUESTED_RANGE_NOT_SATISFIABLE(416, "Requested range not satisfiable"),
/**
* {@code 417 Expectation Failed}.
*
* @see <a href="http://tools.ietf.org/html/rfc7231#section-6.5.14">HTTP/1.1: Semantics and Content, section 6.5.14</a>
*/
EXPECTATION_FAILED(417, "Expectation Failed"),
/**
* {@code 418 I'm a teapot}.
*
* @see <a href="http://tools.ietf.org/html/rfc2324#section-2.3.2">HTCPCP/1.0</a>
*/
I_AM_A_TEAPOT(418, "I'm a teapot"),
/**
* @deprecated See <a href="http://tools.ietf.org/rfcdiff?difftype=--hwdiff&url2=draft-ietf-webdav-protocol-06.txt">WebDAV Draft Changes</a>
*/
@Deprecated
INSUFFICIENT_SPACE_ON_RESOURCE(419, "Insufficient Space On Resource"),
/**
* @deprecated See <a href="http://tools.ietf.org/rfcdiff?difftype=--hwdiff&url2=draft-ietf-webdav-protocol-06.txt">WebDAV Draft Changes</a>
*/
@Deprecated
METHOD_FAILURE(420, "Method Failure"),
/**
* @deprecated See <a href="http://tools.ietf.org/rfcdiff?difftype=--hwdiff&url2=draft-ietf-webdav-protocol-06.txt">WebDAV Draft Changes</a>
*/
@Deprecated
DESTINATION_LOCKED(421, "Destination Locked"),
/**
* {@code 422 Unprocessable Entity}.
*
* @see <a href="http://tools.ietf.org/html/rfc4918#section-11.2">WebDAV</a>
*/
UNPROCESSABLE_ENTITY(422, "Unprocessable Entity"),
/**
* {@code 423 Locked}.
*
* @see <a href="http://tools.ietf.org/html/rfc4918#section-11.3">WebDAV</a>
*/
LOCKED(423, "Locked"),
/**
* {@code 424 Failed Dependency}.
*
* @see <a href="http://tools.ietf.org/html/rfc4918#section-11.4">WebDAV</a>
*/
FAILED_DEPENDENCY(424, "Failed Dependency"),
/**
* {@code 426 Upgrade Required}.
*
* @see <a href="http://tools.ietf.org/html/rfc2817#section-6">Upgrading to TLS Within HTTP/1.1</a>
*/
UPGRADE_REQUIRED(426, "Upgrade Required"),
/**
* {@code 428 Precondition Required}.
*
* @see <a href="http://tools.ietf.org/html/rfc6585#section-3">Additional HTTP Status Codes</a>
*/
PRECONDITION_REQUIRED(428, "Precondition Required"),
/**
* {@code 429 Too Many Requests}.
*
* @see <a href="http://tools.ietf.org/html/rfc6585#section-4">Additional HTTP Status Codes</a>
*/
TOO_MANY_REQUESTS(429, "Too Many Requests"),
/**
* {@code 431 Request Header Fields Too Large}.
*
* @see <a href="http://tools.ietf.org/html/rfc6585#section-5">Additional HTTP Status Codes</a>
*/
REQUEST_HEADER_FIELDS_TOO_LARGE(431, "Request Header Fields Too Large"),
// --- 5xx Server Error ---
/**
* {@code 500 Internal Server Error}.
*
* @see <a href="http://tools.ietf.org/html/rfc7231#section-6.6.1">HTTP/1.1: Semantics and Content, section 6.6.1</a>
*/
INTERNAL_SERVER_ERROR(500, "Internal Server Error"),
/**
* {@code 501 Not Implemented}.
*
* @see <a href="http://tools.ietf.org/html/rfc7231#section-6.6.2">HTTP/1.1: Semantics and Content, section 6.6.2</a>
*/
NOT_IMPLEMENTED(501, "Not Implemented"),
/**
* {@code 502 Bad Gateway}.
*
* @see <a href="http://tools.ietf.org/html/rfc7231#section-6.6.3">HTTP/1.1: Semantics and Content, section 6.6.3</a>
*/
BAD_GATEWAY(502, "Bad Gateway"),
/**
* {@code 503 Service Unavailable}.
*
* @see <a href="http://tools.ietf.org/html/rfc7231#section-6.6.4">HTTP/1.1: Semantics and Content, section 6.6.4</a>
*/
SERVICE_UNAVAILABLE(503, "Service Unavailable"),
/**
* {@code 504 Gateway Timeout}.
*
* @see <a href="http://tools.ietf.org/html/rfc7231#section-6.6.5">HTTP/1.1: Semantics and Content, section 6.6.5</a>
*/
GATEWAY_TIMEOUT(504, "Gateway Timeout"),
/**
* {@code 505 HTTP Version Not Supported}.
*
* @see <a href="http://tools.ietf.org/html/rfc7231#section-6.6.6">HTTP/1.1: Semantics and Content, section 6.6.6</a>
*/
HTTP_VERSION_NOT_SUPPORTED(505, "HTTP Version not supported"),
/**
* {@code 506 Variant Also Negotiates}
*
* @see <a href="http://tools.ietf.org/html/rfc2295#section-8.1">Transparent Content Negotiation</a>
*/
VARIANT_ALSO_NEGOTIATES(506, "Variant Also Negotiates"),
/**
* {@code 507 Insufficient Storage}
*
* @see <a href="http://tools.ietf.org/html/rfc4918#section-11.5">WebDAV</a>
*/
INSUFFICIENT_STORAGE(507, "Insufficient Storage"),
/**
* {@code 508 Loop Detected}
*
* @see <a href="http://tools.ietf.org/html/rfc5842#section-7.2">WebDAV Binding Extensions</a>
*/
LOOP_DETECTED(508, "Loop Detected"),
/**
* {@code 509 Bandwidth Limit Exceeded}
*/
BANDWIDTH_LIMIT_EXCEEDED(509, "Bandwidth Limit Exceeded"),
/**
* {@code 510 Not Extended}
*
* @see <a href="http://tools.ietf.org/html/rfc2774#section-7">HTTP Extension Framework</a>
*/
NOT_EXTENDED(510, "Not Extended"),
/**
* {@code 511 Network Authentication Required}.
*
* @see <a href="http://tools.ietf.org/html/rfc6585#section-6">Additional HTTP Status Codes</a>
*/
NETWORK_AUTHENTICATION_REQUIRED(511, "Network Authentication Required");
private final int value;
private final String reasonPhrase;
HttpStatus(final int value, final String reasonPhrase) {
this.value = value;
this.reasonPhrase = reasonPhrase;
}
/**
* Return the integer value of this status code.
*/
public int value() {
return this.value;
}
/**
* Return the reason phrase of this status code.
*/
public String getReasonPhrase() {
return this.reasonPhrase;
}
/**
* Return a string representation of this status code.
*/
@Override
public String toString() {
return Integer.toString(this.value);
}
/**
* Return the enum constant of this type with the specified numeric value.
*
* @param statusCode the numeric value of the enum to be returned
* @return the enum constant with the specified numeric value
* @throws IllegalArgumentException if this enum has no constant for the specified numeric value
*/
public static HttpStatus valueOf(final int statusCode) {
for (final HttpStatus status : values()) {
if (status.value == statusCode) {
return status;
}
}
throw new IllegalArgumentException("No matching constant for [" + statusCode + "]");
}
}

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source-code/RuffCT-java/src/org/nem/core/utils/LockFile.java Executable file
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package org.nem.core.utils;
import java.io.*;
import java.nio.channels.*;
/**
* Static class that exposes functions for interacting with lock files.
*/
public class LockFile {
/**
* Tries to acquire a file lock for the specified file.
*
* @param lockFile The lock file.
* @return A handle to the file lock if acquired, or null otherwise.
*/
public static Closeable tryAcquireLock(final File lockFile) {
FileLockHandle handle = null;
try {
handle = new FileLockHandle(lockFile);
// try to acquire the lock 5 times
for (int i = 0; i < 5; ++i) {
if (handle.tryLock()) {
return handle;
}
ExceptionUtils.propagateVoid(() -> Thread.sleep(10));
}
return null;
} catch (final IOException | OverlappingFileLockException e) {
return null;
} finally {
if (null != handle && null == handle.lock) {
try {
handle.close();
} catch (final IOException ignored) {
}
}
}
}
/**
* Determines whether or not the specified file is locked.
*
* @param lockFile The lock file.
* @return true if the file is locked, false otherwise.
*/
public static boolean isLocked(final File lockFile) {
try (final FileLockHandle handle = new FileLockHandle(lockFile)) {
return !handle.tryLock();
} catch (final OverlappingFileLockException e) {
return true;
} catch (final IOException e) {
return false;
}
}
private static class FileLockHandle implements Closeable {
private final RandomAccessFile file;
private FileLock lock;
public FileLockHandle(final File lockFile) throws IOException {
this.file = new RandomAccessFile(lockFile, "rw");
}
private boolean tryLock() throws IOException {
this.lock = this.file.getChannel().tryLock();
return null != this.lock;
}
@Override
public void close() throws IOException {
if (null != this.lock) {
this.lock.close();
}
this.file.close();
}
}
}

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source-code/RuffCT-java/src/org/nem/core/utils/MustBe.java Executable file
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package org.nem.core.utils;
import java.util.Collection;
import java.util.regex.Pattern;
/**
* Helper class for validating parameters.
*/
public class MustBe {
/**
* Throws an exception if the specified object is null.
*
* @param obj The object.
* @param name The object name.
*/
public static void notNull(final Object obj, final String name) {
if (null == obj) {
final String message = String.format("%s cannot be null", name);
throw new IllegalArgumentException(message);
}
}
/**
* Throws an exception if the specified string contains no non-whitespace characters.
*
* @param str The string.
* @param name The string name.
* @param maxLength The max length.
*/
public static void notWhitespace(final String str, final String name, final int maxLength) {
if (StringUtils.isNullOrWhitespace(str) || str.length() > maxLength) {
final String message = String.format("%s cannot be null, empty, or whitespace, or have length greater than %d", name, maxLength);
throw new IllegalArgumentException(message);
}
}
/**
* Throws an exception if the specified string does not match the pattern, is empty, or longer than the max length.
*
* @param str The string.
* @param name The string name.
* @param pattern The pattern to match.
* @param maxLength The max length.
*/
public static void match(final String str, final String name, final Pattern pattern, final int maxLength) {
if (null == str || str.isEmpty() || str.length() > maxLength || !pattern.matcher(str).matches()) {
final String message = String.format("%s does not match the desired pattern", name);
throw new IllegalArgumentException(message);
}
}
/**
* Throws an exception if the specified integer value is not in the specified inclusive range.
*
* @param value The integer value.
* @param name The value name.
* @param minInclusive The min allowed value (inclusive).
* @param maxInclusive The max allowed value (inclusive).
*/
public static void inRange(final int value, final String name, final int minInclusive, final int maxInclusive) {
inRange((long)value, name, minInclusive, maxInclusive);
}
/**
* Throws an exception if the specified long value is not in the specified inclusive range.
*
* @param value The long value.
* @param name The value name.
* @param minInclusive The min allowed value (inclusive).
* @param maxInclusive The max allowed value (inclusive).
*/
public static void inRange(final long value, final String name, final long minInclusive, final long maxInclusive) {
if (value < minInclusive || value > maxInclusive) {
final String message = String.format("%s must be between %d and %d inclusive", name, minInclusive, maxInclusive);
throw new IllegalArgumentException(message);
}
}
/**
* Throws an exception if the specified collection is not empty.
*
* @param collection The collection.
* @param name The collection name.
*/
public static void empty(final Collection<?> collection, final String name) {
if (!collection.isEmpty()) {
final String message = String.format("%s must be empty", name);
throw new IllegalArgumentException(message);
}
}
/**
* Throws an exception if the specified value is not true.
*
* @param value The value.
* @param name The value name.
*/
public static void trueValue(final boolean value, final String name) {
if (!value) {
final String message = String.format("%s must be true", name);
throw new IllegalArgumentException(message);
}
}
/**
* Throws an exception if the specified value is not false.
*
* @param value The value.
* @param name The value name.
*/
public static void falseValue(final boolean value, final String name) {
if (value) {
final String message = String.format("%s must be false", name);
throw new IllegalArgumentException(message);
}
}
}

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source-code/RuffCT-java/src/org/nem/core/utils/SetOnce.java Executable file
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package org.nem.core.utils;
/**
* Wrapper that allows an object to be set once (or reset and set again).
*
* @param <T> The inner type.
*/
public class SetOnce<T> {
private final T defaultValue;
private T value;
/**
* Creates a wrapper.
*
* @param defaultValue The default value.
*/
public SetOnce(final T defaultValue) {
this.defaultValue = defaultValue;
}
/**
* Gets the inner object.
*
* @return The inner object.
*/
public T get() {
return null == this.value ? this.defaultValue : this.value;
}
/**
* Sets the inner object.
*
* @param value The inner object.
*/
public void set(final T value) {
if (null != this.value && null != value) {
throw new IllegalStateException("cannot change value because it is already set");
}
this.value = value;
}
}

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source-code/RuffCT-java/src/org/nem/core/utils/StringEncoder.java Executable file
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package org.nem.core.utils;
import java.nio.charset.Charset;
/**
* Static class that contains utility functions for converting strings to and from UTF-8 bytes.
*/
public class StringEncoder {
private static final Charset ENCODING_CHARSET = Charset.forName("UTF-8");
/**
* Converts a string to a UTF-8 byte array.
*
* @param s The input string.
* @return The output byte array.
*/
public static byte[] getBytes(final String s) {
return s.getBytes(ENCODING_CHARSET);
}
/**
* Converts a UTF-8 byte array to a string.
*
* @param bytes The input byte array.
* @return The output string.
*/
public static String getString(final byte[] bytes) {
return new String(bytes, ENCODING_CHARSET);
}
}

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source-code/RuffCT-java/src/org/nem/core/utils/StringUtils.java Executable file
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package org.nem.core.utils;
/**
* Static class that contains string utility functions.
*/
public class StringUtils {
/**
* Determines if the specified string is null or empty.
*
* @param str The string.
* @return true if the string is null or empty.
*/
public static boolean isNullOrEmpty(final String str) {
return null == str || str.isEmpty();
}
/**
* Determines if the specified string is null or whitespace.
*
* @param str The string.
* @return true if the string is null or whitespace.
*/
public static boolean isNullOrWhitespace(final String str) {
if (isNullOrEmpty(str)) {
return true;
}
for (int i = 0; i < str.length(); i++) {
if (!Character.isWhitespace(str.charAt(i))) {
return false;
}
}
return true;
}
/**
* Replaces a variable contained in a string with a value. A variable is defined as ${variable}.
* This pattern is replaced by the given value.
*
* @param string String that contains variables.
* @param name Name of the variable to be replaced with its value.
* @param value Value that will replace the variable.
* @return string with value replacing the variable with the given name
*/
public static String replaceVariable(final String string, final String name, final String value) {
return string.replace(String.format("${%s}", name), value);
}
}

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source-code/RuffCT-java/src/test/how/monero/hodl/BootleRuffingBenchmarks.java Normal file
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package test.how.monero.hodl;
import how.monero.hodl.ringSignature.SpendParams;
import org.nem.core.crypto.ed25519.arithmetic.Ed25519GroupElement;
import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import static how.monero.hodl.ringSignature.BootleRuffing.*;
import static test.how.monero.hodl.BootleRuffingSpendTest.createTestSpendParams;
public class BootleRuffingBenchmarks {
public static void spendTest() throws IOException {
int[] inputsVariants = new int[]{1, 2, 3, 4, 5, 10, 20};
int[] decompositionExponentVariants = new int[]{2, 3, 4, 5, 6, 7, 8, 9, 10};
List<List<String>> sheet = new ArrayList<>();
List<String> sheetColTitles = new ArrayList<>();
sheetColTitles.add("Inputs");
sheetColTitles.add("Base");
sheetColTitles.add("Exponent");
sheetColTitles.add("Ring size");
sheetColTitles.add("Generation time (ms)");
sheetColTitles.add("Generation scalar mults");
sheetColTitles.add("Generation G scalar mults");
sheetColTitles.add("Verification time (ms)");
sheetColTitles.add("Verification scalar mults");
sheetColTitles.add("Verification G scalar mults");
sheetColTitles.add("Signature length excl. vins (bytes)");
sheetColTitles.add("MLSAG equiv. length excl. vins (bytes)");
sheet.add(sheetColTitles);
int testIterations = 1;
int decompositionBase = 2;
for(int inputs : inputsVariants) {
for(int decompositionExponent : decompositionExponentVariants) {
System.out.println("******* inputs: " + inputs + ", decompositionExponent: " + decompositionExponent);
long startMs = new Date().getTime();
SpendParams[] sp = new SpendParams[testIterations];
for (int i=0; i<testIterations; i++) sp[i] = createTestSpendParams(decompositionBase, decompositionExponent, inputs);
long spendParamsGenerationDuration = (new Date().getTime()-startMs);
System.out.println("Spend params generation duration: " + spendParamsGenerationDuration + " ms");
startMs = new Date().getTime();
// create a transaction to spend the outputs, resulting in a signature that proves the authority to send them
SpendSignature[] spendSignature = new SpendSignature[testIterations];
for (int i=0; i<testIterations; i++) {
Ed25519GroupElement.scalarMults = 0;
Ed25519GroupElement.scalarBaseMults = 0;
spendSignature[i] = SPEND(sp[i]);
}
int spendScalarMults = Ed25519GroupElement.scalarMults;
int spendScalarBaseMults = Ed25519GroupElement.scalarBaseMults;
long spendSignatureGenerationDuration = (new Date().getTime()-startMs);
System.out.println("Spend signature generation duration: " + spendSignatureGenerationDuration + " ms");
byte[][] spendSignatureBytes = new byte[testIterations][];
spendSignatureBytes[0] = spendSignature[0].toBytes();
System.out.println("Spend Signature length (bytes):" + spendSignatureBytes[0].length);
startMs = new Date().getTime();
// verify the spend transaction
for (int i=0; i<testIterations; i++) {
Ed25519GroupElement.scalarMults = 0;
Ed25519GroupElement.scalarBaseMults = 0;
boolean verified = VER(sp[i].ki, sp[i].pk, sp[i].co, spendSignature[i].co1, sp[i].M, spendSignature[i]);
System.out.println("verified: " + verified);
}
int verifyScalarMults = Ed25519GroupElement.scalarMults;
int verifyScalarBaseMults = Ed25519GroupElement.scalarBaseMults;
long spendSignatureVerificationDuration = (new Date().getTime()-startMs);
System.out.println("Signature verification duration: " + spendSignatureVerificationDuration + " ms");
List<String> sheetCols = new ArrayList<>();
sheetCols.add(inputs+"");
sheetCols.add(decompositionBase+"");
sheetCols.add(decompositionExponent+"");
sheetCols.add(((int)Math.pow(decompositionBase, decompositionExponent))+"");
sheetCols.add((spendSignatureGenerationDuration/testIterations)+"");
sheetCols.add((spendScalarMults)+"");
sheetCols.add((spendScalarBaseMults)+"");
sheetCols.add((spendSignatureVerificationDuration/testIterations)+"");
sheetCols.add((verifyScalarMults)+"");
sheetCols.add((verifyScalarBaseMults)+"");
sheetCols.add((spendSignatureBytes[0].length)+"");
sheetCols.add((inputs * (32 + 64 * ((int) Math.pow(decompositionBase, decompositionExponent))))+"");
sheet.add(sheetCols);
}
}
String csv = "";
for(List<String> row : sheet) {
for(int i=0; i<row.size(); i++) {
csv+=row.get(i);
if(i!=(row.size()-1)) csv+=",";
else csv+="\n";
}
}
System.out.println(csv);
Files.write(new File(System.getProperty("user.home"), "bootleruffing-benchmarks.csv").toPath(), csv.getBytes());
}
public static void main(String[] args) throws Exception {
long startTime = new Date().getTime();
spendTest();
System.out.println("\nTotal duration: " + (new Date().getTime()-startTime) + " ms");
}
}

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source-code/RuffCT-java/src/test/how/monero/hodl/BootleRuffingSpendTest.java Normal file
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package test.how.monero.hodl;
import how.monero.hodl.crypto.PointPair;
import how.monero.hodl.crypto.Scalar;
import how.monero.hodl.ringSignature.SpendParams;
import org.nem.core.crypto.ed25519.arithmetic.Ed25519GroupElement;
import java.math.BigInteger;
import java.util.Arrays;
import java.util.Date;
import java.util.HashMap;
import static how.monero.hodl.crypto.CryptoUtil.*;
import static how.monero.hodl.ringSignature.BootleRuffing.*;
public class BootleRuffingSpendTest {
public static SpendParams createTestSpendParams(int decompositionBase, int decompositionExponent, int inputs) {
// ring size must be a power of the decomposition base
int ringSize = (int) Math.pow(decompositionBase, decompositionExponent);
SpendParams sp = new SpendParams();
sp.decompositionBase = decompositionBase;
sp.decompositionExponent = decompositionExponent;
// The owned inputs that are going to be spent
Output[] realInputs = new Output[inputs];
for(int i=0; i<inputs; i++) realInputs[i] = Output.genRandomOutput(BigInteger.valueOf((long)(Math.random()*1000+1000)));
// The new outputs to be created (typically one for the recipient one for change)
BigInteger fee = BigInteger.valueOf(0); //keep fee as zero for now, to avoid overcomplicating things
Output[] outputs = new Output[2];
outputs[0] = Output.genRandomOutput(realInputs[0].amount.divide(BigInteger.valueOf(2)));
outputs[1] = Output.genRandomOutput(BigInteger.valueOf(Arrays.stream(realInputs).mapToLong(i->i.amount.longValue()).sum()).subtract(fee).subtract(outputs[0].amount));
sp.iAsterisk = (int) Math.floor(Math.random()*ringSize); // the ring index of the sender's owned inputs
// input commitments
// commitments to the amounts of all inputs referenced in the transaction (real inputs and decoys)
Ed25519GroupElement[][] inputCommitments = new Ed25519GroupElement[inputs][ringSize];
for(int j=0; j<inputs; j++) {
for(int i=0; i<ringSize; i++) {
if(i==sp.iAsterisk) inputCommitments[j][i] = realInputs[j].co;
else inputCommitments[j][i] = randomPoint();
}
}
// there is a co commitment for each ring
// each member of co is sum(COMp(input amt i)) - sum(COMp(output amt i))
sp.co = new Ed25519GroupElement[ringSize];
for(int i=0; i<ringSize; i++) {
sp.co[i] = inputCommitments[0][i];
for(int j=1; j<inputs; j++) {
sp.co[i] = sp.co[i].toP3().add(inputCommitments[j][i].toP3().toCached());
}
for(int k=0; k<outputs.length; k++) {
sp.co[i] = sp.co[i].toP3().subtract(outputs[k].co.toP3().toCached());
}
}
// the public keys for every input referenced (including real inputs and decoys)
sp.pk = new PointPair[inputs][ringSize];
// the secret key for every real input referenced
sp.sk = new SK[inputs];
// the key image for every real input referenced
sp.ki = new Ed25519GroupElement[inputs];
for(int j=0; j<inputs; j++) {
for(int i=0; i<ringSize; i++) {
sp.pk[j][i] = (i==sp.iAsterisk) ? realInputs[j].pk : KEYGEN().pk;
}
sp.sk[j] = realInputs[j].sk;
sp.ki[j] = realInputs[j].ki;
}
// the message being signed is a hash of the transaction, as defined in the C codebase as get_pre_mlsag_hash
sp.M = fastHash(randomMessage(100));
sp.s = Scalar.ZERO;
for(int i=0; i<realInputs.length; i++) sp.s = sp.s.add(realInputs[i].mask);
for(int i=0; i<outputs.length; i++) sp.s = sp.s.sub(outputs[i].mask);
Ed25519GroupElement S = realInputs[0].co;
for(int i=1; i<realInputs.length; i++) S = S.toP3().add(realInputs[i].co.toP3().toCached());
S = S.toP3().subtract(G.scalarMultiply(new Scalar(fee)).toP3().toCached());
for(int i=0; i<outputs.length; i++) S = S.toP3().subtract(outputs[i].co.toP3().toCached());
Ed25519GroupElement S1 = getHpnGLookup(1).scalarMultiply(sp.s);
if(!S.toP3().equals(S1)) throw new RuntimeException("S != S'");
return sp;
}
public static void spendTest() {
boolean pauseAtEachStage = false;
int testIterations = 1;
int decompositionBase = 2;
int decompositionExponent = 8;
int inputs = 2;
System.out.println("Ring size: " + Math.pow(decompositionBase, decompositionExponent));
System.out.println("Inputs: " + inputs);
long startMs = new Date().getTime();
SpendParams[] sp = new SpendParams[testIterations];
for (int i=0; i<testIterations; i++) sp[i] = createTestSpendParams(decompositionBase, decompositionExponent, inputs);
System.out.println("Spend params generation duration: " + (new Date().getTime()-startMs) + " ms");
if(pauseAtEachStage) { System.out.println("Press enter to continue"); try { System.in.read(); } catch (Exception e) {}; System.out.println("Continuing..."); }
Ed25519GroupElement.scalarMults = 0;
Ed25519GroupElement.scalarBaseMults = 0;
startMs = new Date().getTime();
// create a transaction to spend the outputs, resulting in a signature that proves the authority to send them
SpendSignature[] spendSignature = new SpendSignature[testIterations];
for (int i=0; i<testIterations; i++) spendSignature[i] = SPEND(sp[i]);
System.out.println("Spend signature generation duration: " + (new Date().getTime()-startMs) + " ms");
byte[][] spendSignatureBytes = new byte[testIterations][];
for (int i=0; i<testIterations; i++) {
spendSignatureBytes[i] = spendSignature[i].toBytes();
System.out.println("Spend Signature length (bytes):" + spendSignatureBytes[i].length);
}
if(pauseAtEachStage) { System.out.println("Press enter to continue"); try { System.in.read(); } catch (Exception e) {}; System.out.println("Continuing..."); }
startMs = new Date().getTime();
System.out.println("Spend ScalarMults: " + Ed25519GroupElement.scalarMults);
System.out.println("Spend BaseScalarMults: " + Ed25519GroupElement.scalarBaseMults);
Ed25519GroupElement.scalarMults = 0;
Ed25519GroupElement.scalarBaseMults = 0;
//Ed25519GroupElement.enableLineRecording = true;
Ed25519GroupElement.lineRecordingSourceFile = "BootleRuffing.java";
// verify the spend transaction
for (int i=0; i<testIterations; i++) {
spendSignature[i] = SpendSignature.fromBytes(spendSignatureBytes[i]);
boolean verified = VER(sp[i].ki, sp[i].pk, sp[i].co, spendSignature[i].co1, sp[i].M, spendSignature[i]);
System.out.println("verified: " + verified);
}
System.out.println("Verify ScalarMults: " + Ed25519GroupElement.scalarMults);
System.out.println("Verify BaseScalarMults: " + Ed25519GroupElement.scalarBaseMults);
System.out.println("Signature verification duration: " + (new Date().getTime()-startMs) + " ms");
if(Ed25519GroupElement.enableLineRecording) Ed25519GroupElement.lineNumberCallFrequencyMap.entrySet().stream().forEach(e->{System.out.println("line: " + e.getKey() + ", calls: " + e.getValue());});
}
public static void main(String[] args) {
long startTime = new Date().getTime();
spendTest();
System.out.println("Total duration: " + (new Date().getTime()-startTime) + " ms");
}
}

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source-code/RuffCT-java/src/test/how/monero/hodl/Prove1Valid1Test1.java Normal file
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package test.how.monero.hodl;
import how.monero.hodl.crypto.Scalar;
import org.nem.core.crypto.ed25519.arithmetic.Ed25519GroupElement;
import static how.monero.hodl.crypto.CryptoUtil.COMb;
import static how.monero.hodl.ringSignature.BootleRuffing.*;
public class Prove1Valid1Test1 {
public static void main(String[] args) {
Scalar[][] b = new Scalar[][] {
new Scalar[]{Scalar.ONE, Scalar.ZERO},
new Scalar[]{Scalar.ZERO, Scalar.ONE}
};
Scalar r = Scalar.ONE;
Proof1 P = PROVE1(b, r);
Ed25519GroupElement B = COMb(b, r);
System.out.println("VALID1 returns " + VALID1(B, P));
}
}

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source-code/RuffCT-java/src/test/how/monero/hodl/Prove2Valid2Test1.java Normal file
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package test.how.monero.hodl;
import how.monero.hodl.crypto.PointPair;
import how.monero.hodl.crypto.Scalar;
import static how.monero.hodl.crypto.CryptoUtil.COMeg;
import static how.monero.hodl.ringSignature.BootleRuffing.*;
public class Prove2Valid2Test1 {
public static void main(String[] args) {
System.out.println("Test: " + new Object(){}.getClass().getEnclosingClass().getName());
// [c[0], c[1]] = [ COMeg(0, r), COMeg(1, s) ] with secret index 0 should PASS
Scalar r = Scalar.ONE;
Scalar s = Scalar.ONE;
PointPair[] co = new PointPair[]{
COMeg(Scalar.ZERO, r),
COMeg(Scalar.ONE, s)
};
int iAsterisk = 0;
int inputs = 1;
int decompositionBase = 2;
int decompositionExponent = 1;
Proof2 P2 = PROVE2(co, iAsterisk, r, inputs, decompositionBase, decompositionExponent);
System.out.println("VALID2 result: " + VALID2(decompositionBase, P2, co));
}
}

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package test.how.monero.hodl;
import how.monero.hodl.crypto.PointPair;
import how.monero.hodl.crypto.Scalar;
import static how.monero.hodl.crypto.CryptoUtil.COMeg;
import static how.monero.hodl.ringSignature.BootleRuffing.*;
public class Prove2Valid2Test1a {
public static void main(String[] args) {
System.out.println("Test: " + new Object(){}.getClass().getEnclosingClass().getName());
Scalar r = Scalar.ONE;
PointPair[] co = new PointPair[]{
COMeg(Scalar.ONE,Scalar.ONE),
COMeg(Scalar.ONE,Scalar.ONE),
COMeg(Scalar.ONE,Scalar.ONE),
COMeg(Scalar.ONE,Scalar.ONE),
COMeg(Scalar.ONE,Scalar.ONE),
COMeg(Scalar.ZERO, Scalar.ONE),
COMeg(Scalar.ONE,Scalar.ONE),
COMeg(Scalar.ONE,Scalar.ONE),
COMeg(Scalar.ONE,Scalar.ONE),
};
int iAsterisk = 5;
int inputs = 1;
int decompositionBase = 3;
int decompositionExponent = 2;
Proof2 P2 = PROVE2(co, iAsterisk, r, inputs, decompositionBase, decompositionExponent);
System.out.println("VALID2 result: " + VALID2(decompositionBase, P2, co));
}
}

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package test.how.monero.hodl;
import how.monero.hodl.crypto.PointPair;
import how.monero.hodl.crypto.Scalar;
import org.nem.core.crypto.ed25519.arithmetic.Ed25519GroupElement;
import java.util.Date;
import static how.monero.hodl.crypto.CryptoUtil.COMeg;
import static how.monero.hodl.ringSignature.BootleRuffing.*;
public class Prove2Valid2Test1b {
public static void main(String[] args) {
System.out.println("Test: " + new Object(){}.getClass().getEnclosingClass().getName());
Scalar r = Scalar.ONE;
for(int k=1; k<=64; k++) {
System.out.println("---------------------------------------------------------------------------");
int len = (int) Math.pow(2, k);
PointPair[] co = new PointPair[len];
for (int i = 0; i < len; i++) co[i] = COMeg(Scalar.intToScalar(i), Scalar.ONE);
int iAsterisk = 0;
int inputs = 1;
int decompositionBase = 2;
int decompositionExponent = k;
System.out.println("k: " + k);
System.out.println("decompositionBase: " + decompositionBase);
System.out.println("decompositionExponent: " + decompositionExponent);
Ed25519GroupElement.scalarMults = 0;
Ed25519GroupElement.scalarBaseMults = 0;
long startMs = new Date().getTime();
Proof2 P2 = PROVE2(co, iAsterisk, r, inputs, decompositionBase, decompositionExponent);
System.out.println("PROVE2 duration: " + (new Date().getTime() - startMs) + " ms");
System.out.println("PROVE2 ScalarMults: " + Ed25519GroupElement.scalarMults);
System.out.println("PROVE2 BaseScalarMults: " + Ed25519GroupElement.scalarBaseMults);
Ed25519GroupElement.scalarMults = 0;
Ed25519GroupElement.scalarBaseMults = 0;
startMs = new Date().getTime();
System.out.println("VALID2 result: " + VALID2(decompositionBase, P2, co));
System.out.println("VALID2 ScalarMults: " + Ed25519GroupElement.scalarMults);
System.out.println("VALID2 BaseScalarMults: " + Ed25519GroupElement.scalarBaseMults);
System.out.println("VALID2 duration: " + (new Date().getTime() - startMs) + " ms");
}
}
}