/* * --------------------------------------------------------------------------- * OpenAES License * --------------------------------------------------------------------------- * Copyright (c) 2012, Nabil S. Al Ramli, www.nalramli.com * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * - Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * - 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. * * 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. * --------------------------------------------------------------------------- */ #include #include #include #include #include // OS X, FreeBSD, OpenBSD and NetBSD don't need malloc.h #if !defined(__APPLE__) && !defined(__FreeBSD__) && !defined(__OpenBSD__) \ && !defined(__DragonFly__) && !defined(__NetBSD__) #include #endif // ANDROID, FreeBSD, OpenBSD and NetBSD also don't need timeb.h #if !defined(__FreeBSD__) && !defined(__OpenBSD__) && !defined(__ANDROID__) \ && !defined(__NetBSD__) #include #else #include #endif #ifdef WIN32 #include #else #include #include #endif #ifdef _MSC_VER #define GETPID() _getpid() #else #define GETPID() getpid() #endif //#include "oaes_config.h" #include "oaes_lib.h" #ifdef OAES_HAVE_ISAAC #include "rand.h" #endif // OAES_HAVE_ISAAC #define OAES_RKEY_LEN 4 #define OAES_COL_LEN 4 #define OAES_ROUND_BASE 7 // the block is padded #define OAES_FLAG_PAD 0x01 #ifndef min # define min(a,b) (((a)<(b)) ? (a) : (b)) #endif /* min */ // "OAES<8-bit header version><8-bit type><16-bit options><8-bit flags><56-bit reserved>" static uint8_t oaes_header[OAES_BLOCK_SIZE] = { // 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f, /*0*/ 0x4f, 0x41, 0x45, 0x53, 0x01, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, }; static uint8_t oaes_gf_8[] = { 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36 }; static uint8_t oaes_sub_byte_value[16][16] = { // 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f, /*0*/ { 0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76 }, /*1*/ { 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0 }, /*2*/ { 0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15 }, /*3*/ { 0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75 }, /*4*/ { 0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84 }, /*5*/ { 0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf }, /*6*/ { 0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8 }, /*7*/ { 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2 }, /*8*/ { 0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73 }, /*9*/ { 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb }, /*a*/ { 0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79 }, /*b*/ { 0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08 }, /*c*/ { 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a }, /*d*/ { 0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e }, /*e*/ { 0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf }, /*f*/ { 0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16 }, }; static uint8_t oaes_inv_sub_byte_value[16][16] = { // 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f, /*0*/ { 0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb }, /*1*/ { 0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87, 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb }, /*2*/ { 0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d, 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e }, /*3*/ { 0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2, 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25 }, /*4*/ { 0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92 }, /*5*/ { 0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda, 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84 }, /*6*/ { 0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06 }, /*7*/ { 0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b }, /*8*/ { 0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73 }, /*9*/ { 0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, 0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e }, /*a*/ { 0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89, 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b }, /*b*/ { 0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20, 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4 }, /*c*/ { 0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f }, /*d*/ { 0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef }, /*e*/ { 0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61 }, /*f*/ { 0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d }, }; static uint8_t oaes_gf_mul_2[16][16] = { // 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f, /*0*/ { 0x00, 0x02, 0x04, 0x06, 0x08, 0x0a, 0x0c, 0x0e, 0x10, 0x12, 0x14, 0x16, 0x18, 0x1a, 0x1c, 0x1e }, /*1*/ { 0x20, 0x22, 0x24, 0x26, 0x28, 0x2a, 0x2c, 0x2e, 0x30, 0x32, 0x34, 0x36, 0x38, 0x3a, 0x3c, 0x3e }, /*2*/ { 0x40, 0x42, 0x44, 0x46, 0x48, 0x4a, 0x4c, 0x4e, 0x50, 0x52, 0x54, 0x56, 0x58, 0x5a, 0x5c, 0x5e }, /*3*/ { 0x60, 0x62, 0x64, 0x66, 0x68, 0x6a, 0x6c, 0x6e, 0x70, 0x72, 0x74, 0x76, 0x78, 0x7a, 0x7c, 0x7e }, /*4*/ { 0x80, 0x82, 0x84, 0x86, 0x88, 0x8a, 0x8c, 0x8e, 0x90, 0x92, 0x94, 0x96, 0x98, 0x9a, 0x9c, 0x9e }, /*5*/ { 0xa0, 0xa2, 0xa4, 0xa6, 0xa8, 0xaa, 0xac, 0xae, 0xb0, 0xb2, 0xb4, 0xb6, 0xb8, 0xba, 0xbc, 0xbe }, /*6*/ { 0xc0, 0xc2, 0xc4, 0xc6, 0xc8, 0xca, 0xcc, 0xce, 0xd0, 0xd2, 0xd4, 0xd6, 0xd8, 0xda, 0xdc, 0xde }, /*7*/ { 0xe0, 0xe2, 0xe4, 0xe6, 0xe8, 0xea, 0xec, 0xee, 0xf0, 0xf2, 0xf4, 0xf6, 0xf8, 0xfa, 0xfc, 0xfe }, /*8*/ { 0x1b, 0x19, 0x1f, 0x1d, 0x13, 0x11, 0x17, 0x15, 0x0b, 0x09, 0x0f, 0x0d, 0x03, 0x01, 0x07, 0x05 }, /*9*/ { 0x3b, 0x39, 0x3f, 0x3d, 0x33, 0x31, 0x37, 0x35, 0x2b, 0x29, 0x2f, 0x2d, 0x23, 0x21, 0x27, 0x25 }, /*a*/ { 0x5b, 0x59, 0x5f, 0x5d, 0x53, 0x51, 0x57, 0x55, 0x4b, 0x49, 0x4f, 0x4d, 0x43, 0x41, 0x47, 0x45 }, /*b*/ { 0x7b, 0x79, 0x7f, 0x7d, 0x73, 0x71, 0x77, 0x75, 0x6b, 0x69, 0x6f, 0x6d, 0x63, 0x61, 0x67, 0x65 }, /*c*/ { 0x9b, 0x99, 0x9f, 0x9d, 0x93, 0x91, 0x97, 0x95, 0x8b, 0x89, 0x8f, 0x8d, 0x83, 0x81, 0x87, 0x85 }, /*d*/ { 0xbb, 0xb9, 0xbf, 0xbd, 0xb3, 0xb1, 0xb7, 0xb5, 0xab, 0xa9, 0xaf, 0xad, 0xa3, 0xa1, 0xa7, 0xa5 }, /*e*/ { 0xdb, 0xd9, 0xdf, 0xdd, 0xd3, 0xd1, 0xd7, 0xd5, 0xcb, 0xc9, 0xcf, 0xcd, 0xc3, 0xc1, 0xc7, 0xc5 }, /*f*/ { 0xfb, 0xf9, 0xff, 0xfd, 0xf3, 0xf1, 0xf7, 0xf5, 0xeb, 0xe9, 0xef, 0xed, 0xe3, 0xe1, 0xe7, 0xe5 }, }; static uint8_t oaes_gf_mul_3[16][16] = { // 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f, /*0*/ { 0x00, 0x03, 0x06, 0x05, 0x0c, 0x0f, 0x0a, 0x09, 0x18, 0x1b, 0x1e, 0x1d, 0x14, 0x17, 0x12, 0x11 }, /*1*/ { 0x30, 0x33, 0x36, 0x35, 0x3c, 0x3f, 0x3a, 0x39, 0x28, 0x2b, 0x2e, 0x2d, 0x24, 0x27, 0x22, 0x21 }, /*2*/ { 0x60, 0x63, 0x66, 0x65, 0x6c, 0x6f, 0x6a, 0x69, 0x78, 0x7b, 0x7e, 0x7d, 0x74, 0x77, 0x72, 0x71 }, /*3*/ { 0x50, 0x53, 0x56, 0x55, 0x5c, 0x5f, 0x5a, 0x59, 0x48, 0x4b, 0x4e, 0x4d, 0x44, 0x47, 0x42, 0x41 }, /*4*/ { 0xc0, 0xc3, 0xc6, 0xc5, 0xcc, 0xcf, 0xca, 0xc9, 0xd8, 0xdb, 0xde, 0xdd, 0xd4, 0xd7, 0xd2, 0xd1 }, /*5*/ { 0xf0, 0xf3, 0xf6, 0xf5, 0xfc, 0xff, 0xfa, 0xf9, 0xe8, 0xeb, 0xee, 0xed, 0xe4, 0xe7, 0xe2, 0xe1 }, /*6*/ { 0xa0, 0xa3, 0xa6, 0xa5, 0xac, 0xaf, 0xaa, 0xa9, 0xb8, 0xbb, 0xbe, 0xbd, 0xb4, 0xb7, 0xb2, 0xb1 }, /*7*/ { 0x90, 0x93, 0x96, 0x95, 0x9c, 0x9f, 0x9a, 0x99, 0x88, 0x8b, 0x8e, 0x8d, 0x84, 0x87, 0x82, 0x81 }, /*8*/ { 0x9b, 0x98, 0x9d, 0x9e, 0x97, 0x94, 0x91, 0x92, 0x83, 0x80, 0x85, 0x86, 0x8f, 0x8c, 0x89, 0x8a }, /*9*/ { 0xab, 0xa8, 0xad, 0xae, 0xa7, 0xa4, 0xa1, 0xa2, 0xb3, 0xb0, 0xb5, 0xb6, 0xbf, 0xbc, 0xb9, 0xba }, /*a*/ { 0xfb, 0xf8, 0xfd, 0xfe, 0xf7, 0xf4, 0xf1, 0xf2, 0xe3, 0xe0, 0xe5, 0xe6, 0xef, 0xec, 0xe9, 0xea }, /*b*/ { 0xcb, 0xc8, 0xcd, 0xce, 0xc7, 0xc4, 0xc1, 0xc2, 0xd3, 0xd0, 0xd5, 0xd6, 0xdf, 0xdc, 0xd9, 0xda }, /*c*/ { 0x5b, 0x58, 0x5d, 0x5e, 0x57, 0x54, 0x51, 0x52, 0x43, 0x40, 0x45, 0x46, 0x4f, 0x4c, 0x49, 0x4a }, /*d*/ { 0x6b, 0x68, 0x6d, 0x6e, 0x67, 0x64, 0x61, 0x62, 0x73, 0x70, 0x75, 0x76, 0x7f, 0x7c, 0x79, 0x7a }, /*e*/ { 0x3b, 0x38, 0x3d, 0x3e, 0x37, 0x34, 0x31, 0x32, 0x23, 0x20, 0x25, 0x26, 0x2f, 0x2c, 0x29, 0x2a }, /*f*/ { 0x0b, 0x08, 0x0d, 0x0e, 0x07, 0x04, 0x01, 0x02, 0x13, 0x10, 0x15, 0x16, 0x1f, 0x1c, 0x19, 0x1a }, }; static uint8_t oaes_gf_mul_9[16][16] = { // 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f, /*0*/ { 0x00, 0x09, 0x12, 0x1b, 0x24, 0x2d, 0x36, 0x3f, 0x48, 0x41, 0x5a, 0x53, 0x6c, 0x65, 0x7e, 0x77 }, /*1*/ { 0x90, 0x99, 0x82, 0x8b, 0xb4, 0xbd, 0xa6, 0xaf, 0xd8, 0xd1, 0xca, 0xc3, 0xfc, 0xf5, 0xee, 0xe7 }, /*2*/ { 0x3b, 0x32, 0x29, 0x20, 0x1f, 0x16, 0x0d, 0x04, 0x73, 0x7a, 0x61, 0x68, 0x57, 0x5e, 0x45, 0x4c }, /*3*/ { 0xab, 0xa2, 0xb9, 0xb0, 0x8f, 0x86, 0x9d, 0x94, 0xe3, 0xea, 0xf1, 0xf8, 0xc7, 0xce, 0xd5, 0xdc }, /*4*/ { 0x76, 0x7f, 0x64, 0x6d, 0x52, 0x5b, 0x40, 0x49, 0x3e, 0x37, 0x2c, 0x25, 0x1a, 0x13, 0x08, 0x01 }, /*5*/ { 0xe6, 0xef, 0xf4, 0xfd, 0xc2, 0xcb, 0xd0, 0xd9, 0xae, 0xa7, 0xbc, 0xb5, 0x8a, 0x83, 0x98, 0x91 }, /*6*/ { 0x4d, 0x44, 0x5f, 0x56, 0x69, 0x60, 0x7b, 0x72, 0x05, 0x0c, 0x17, 0x1e, 0x21, 0x28, 0x33, 0x3a }, /*7*/ { 0xdd, 0xd4, 0xcf, 0xc6, 0xf9, 0xf0, 0xeb, 0xe2, 0x95, 0x9c, 0x87, 0x8e, 0xb1, 0xb8, 0xa3, 0xaa }, /*8*/ { 0xec, 0xe5, 0xfe, 0xf7, 0xc8, 0xc1, 0xda, 0xd3, 0xa4, 0xad, 0xb6, 0xbf, 0x80, 0x89, 0x92, 0x9b }, /*9*/ { 0x7c, 0x75, 0x6e, 0x67, 0x58, 0x51, 0x4a, 0x43, 0x34, 0x3d, 0x26, 0x2f, 0x10, 0x19, 0x02, 0x0b }, /*a*/ { 0xd7, 0xde, 0xc5, 0xcc, 0xf3, 0xfa, 0xe1, 0xe8, 0x9f, 0x96, 0x8d, 0x84, 0xbb, 0xb2, 0xa9, 0xa0 }, /*b*/ { 0x47, 0x4e, 0x55, 0x5c, 0x63, 0x6a, 0x71, 0x78, 0x0f, 0x06, 0x1d, 0x14, 0x2b, 0x22, 0x39, 0x30 }, /*c*/ { 0x9a, 0x93, 0x88, 0x81, 0xbe, 0xb7, 0xac, 0xa5, 0xd2, 0xdb, 0xc0, 0xc9, 0xf6, 0xff, 0xe4, 0xed }, /*d*/ { 0x0a, 0x03, 0x18, 0x11, 0x2e, 0x27, 0x3c, 0x35, 0x42, 0x4b, 0x50, 0x59, 0x66, 0x6f, 0x74, 0x7d }, /*e*/ { 0xa1, 0xa8, 0xb3, 0xba, 0x85, 0x8c, 0x97, 0x9e, 0xe9, 0xe0, 0xfb, 0xf2, 0xcd, 0xc4, 0xdf, 0xd6 }, /*f*/ { 0x31, 0x38, 0x23, 0x2a, 0x15, 0x1c, 0x07, 0x0e, 0x79, 0x70, 0x6b, 0x62, 0x5d, 0x54, 0x4f, 0x46 }, }; static uint8_t oaes_gf_mul_b[16][16] = { // 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f, /*0*/ { 0x00, 0x0b, 0x16, 0x1d, 0x2c, 0x27, 0x3a, 0x31, 0x58, 0x53, 0x4e, 0x45, 0x74, 0x7f, 0x62, 0x69 }, /*1*/ { 0xb0, 0xbb, 0xa6, 0xad, 0x9c, 0x97, 0x8a, 0x81, 0xe8, 0xe3, 0xfe, 0xf5, 0xc4, 0xcf, 0xd2, 0xd9 }, /*2*/ { 0x7b, 0x70, 0x6d, 0x66, 0x57, 0x5c, 0x41, 0x4a, 0x23, 0x28, 0x35, 0x3e, 0x0f, 0x04, 0x19, 0x12 }, /*3*/ { 0xcb, 0xc0, 0xdd, 0xd6, 0xe7, 0xec, 0xf1, 0xfa, 0x93, 0x98, 0x85, 0x8e, 0xbf, 0xb4, 0xa9, 0xa2 }, /*4*/ { 0xf6, 0xfd, 0xe0, 0xeb, 0xda, 0xd1, 0xcc, 0xc7, 0xae, 0xa5, 0xb8, 0xb3, 0x82, 0x89, 0x94, 0x9f }, /*5*/ { 0x46, 0x4d, 0x50, 0x5b, 0x6a, 0x61, 0x7c, 0x77, 0x1e, 0x15, 0x08, 0x03, 0x32, 0x39, 0x24, 0x2f }, /*6*/ { 0x8d, 0x86, 0x9b, 0x90, 0xa1, 0xaa, 0xb7, 0xbc, 0xd5, 0xde, 0xc3, 0xc8, 0xf9, 0xf2, 0xef, 0xe4 }, /*7*/ { 0x3d, 0x36, 0x2b, 0x20, 0x11, 0x1a, 0x07, 0x0c, 0x65, 0x6e, 0x73, 0x78, 0x49, 0x42, 0x5f, 0x54 }, /*8*/ { 0xf7, 0xfc, 0xe1, 0xea, 0xdb, 0xd0, 0xcd, 0xc6, 0xaf, 0xa4, 0xb9, 0xb2, 0x83, 0x88, 0x95, 0x9e }, /*9*/ { 0x47, 0x4c, 0x51, 0x5a, 0x6b, 0x60, 0x7d, 0x76, 0x1f, 0x14, 0x09, 0x02, 0x33, 0x38, 0x25, 0x2e }, /*a*/ { 0x8c, 0x87, 0x9a, 0x91, 0xa0, 0xab, 0xb6, 0xbd, 0xd4, 0xdf, 0xc2, 0xc9, 0xf8, 0xf3, 0xee, 0xe5 }, /*b*/ { 0x3c, 0x37, 0x2a, 0x21, 0x10, 0x1b, 0x06, 0x0d, 0x64, 0x6f, 0x72, 0x79, 0x48, 0x43, 0x5e, 0x55 }, /*c*/ { 0x01, 0x0a, 0x17, 0x1c, 0x2d, 0x26, 0x3b, 0x30, 0x59, 0x52, 0x4f, 0x44, 0x75, 0x7e, 0x63, 0x68 }, /*d*/ { 0xb1, 0xba, 0xa7, 0xac, 0x9d, 0x96, 0x8b, 0x80, 0xe9, 0xe2, 0xff, 0xf4, 0xc5, 0xce, 0xd3, 0xd8 }, /*e*/ { 0x7a, 0x71, 0x6c, 0x67, 0x56, 0x5d, 0x40, 0x4b, 0x22, 0x29, 0x34, 0x3f, 0x0e, 0x05, 0x18, 0x13 }, /*f*/ { 0xca, 0xc1, 0xdc, 0xd7, 0xe6, 0xed, 0xf0, 0xfb, 0x92, 0x99, 0x84, 0x8f, 0xbe, 0xb5, 0xa8, 0xa3 }, }; static uint8_t oaes_gf_mul_d[16][16] = { // 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f, /*0*/ { 0x00, 0x0d, 0x1a, 0x17, 0x34, 0x39, 0x2e, 0x23, 0x68, 0x65, 0x72, 0x7f, 0x5c, 0x51, 0x46, 0x4b }, /*1*/ { 0xd0, 0xdd, 0xca, 0xc7, 0xe4, 0xe9, 0xfe, 0xf3, 0xb8, 0xb5, 0xa2, 0xaf, 0x8c, 0x81, 0x96, 0x9b }, /*2*/ { 0xbb, 0xb6, 0xa1, 0xac, 0x8f, 0x82, 0x95, 0x98, 0xd3, 0xde, 0xc9, 0xc4, 0xe7, 0xea, 0xfd, 0xf0 }, /*3*/ { 0x6b, 0x66, 0x71, 0x7c, 0x5f, 0x52, 0x45, 0x48, 0x03, 0x0e, 0x19, 0x14, 0x37, 0x3a, 0x2d, 0x20 }, /*4*/ { 0x6d, 0x60, 0x77, 0x7a, 0x59, 0x54, 0x43, 0x4e, 0x05, 0x08, 0x1f, 0x12, 0x31, 0x3c, 0x2b, 0x26 }, /*5*/ { 0xbd, 0xb0, 0xa7, 0xaa, 0x89, 0x84, 0x93, 0x9e, 0xd5, 0xd8, 0xcf, 0xc2, 0xe1, 0xec, 0xfb, 0xf6 }, /*6*/ { 0xd6, 0xdb, 0xcc, 0xc1, 0xe2, 0xef, 0xf8, 0xf5, 0xbe, 0xb3, 0xa4, 0xa9, 0x8a, 0x87, 0x90, 0x9d }, /*7*/ { 0x06, 0x0b, 0x1c, 0x11, 0x32, 0x3f, 0x28, 0x25, 0x6e, 0x63, 0x74, 0x79, 0x5a, 0x57, 0x40, 0x4d }, /*8*/ { 0xda, 0xd7, 0xc0, 0xcd, 0xee, 0xe3, 0xf4, 0xf9, 0xb2, 0xbf, 0xa8, 0xa5, 0x86, 0x8b, 0x9c, 0x91 }, /*9*/ { 0x0a, 0x07, 0x10, 0x1d, 0x3e, 0x33, 0x24, 0x29, 0x62, 0x6f, 0x78, 0x75, 0x56, 0x5b, 0x4c, 0x41 }, /*a*/ { 0x61, 0x6c, 0x7b, 0x76, 0x55, 0x58, 0x4f, 0x42, 0x09, 0x04, 0x13, 0x1e, 0x3d, 0x30, 0x27, 0x2a }, /*b*/ { 0xb1, 0xbc, 0xab, 0xa6, 0x85, 0x88, 0x9f, 0x92, 0xd9, 0xd4, 0xc3, 0xce, 0xed, 0xe0, 0xf7, 0xfa }, /*c*/ { 0xb7, 0xba, 0xad, 0xa0, 0x83, 0x8e, 0x99, 0x94, 0xdf, 0xd2, 0xc5, 0xc8, 0xeb, 0xe6, 0xf1, 0xfc }, /*d*/ { 0x67, 0x6a, 0x7d, 0x70, 0x53, 0x5e, 0x49, 0x44, 0x0f, 0x02, 0x15, 0x18, 0x3b, 0x36, 0x21, 0x2c }, /*e*/ { 0x0c, 0x01, 0x16, 0x1b, 0x38, 0x35, 0x22, 0x2f, 0x64, 0x69, 0x7e, 0x73, 0x50, 0x5d, 0x4a, 0x47 }, /*f*/ { 0xdc, 0xd1, 0xc6, 0xcb, 0xe8, 0xe5, 0xf2, 0xff, 0xb4, 0xb9, 0xae, 0xa3, 0x80, 0x8d, 0x9a, 0x97 }, }; static uint8_t oaes_gf_mul_e[16][16] = { // 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, f, /*0*/ { 0x00, 0x0e, 0x1c, 0x12, 0x38, 0x36, 0x24, 0x2a, 0x70, 0x7e, 0x6c, 0x62, 0x48, 0x46, 0x54, 0x5a }, /*1*/ { 0xe0, 0xee, 0xfc, 0xf2, 0xd8, 0xd6, 0xc4, 0xca, 0x90, 0x9e, 0x8c, 0x82, 0xa8, 0xa6, 0xb4, 0xba }, /*2*/ { 0xdb, 0xd5, 0xc7, 0xc9, 0xe3, 0xed, 0xff, 0xf1, 0xab, 0xa5, 0xb7, 0xb9, 0x93, 0x9d, 0x8f, 0x81 }, /*3*/ { 0x3b, 0x35, 0x27, 0x29, 0x03, 0x0d, 0x1f, 0x11, 0x4b, 0x45, 0x57, 0x59, 0x73, 0x7d, 0x6f, 0x61 }, /*4*/ { 0xad, 0xa3, 0xb1, 0xbf, 0x95, 0x9b, 0x89, 0x87, 0xdd, 0xd3, 0xc1, 0xcf, 0xe5, 0xeb, 0xf9, 0xf7 }, /*5*/ { 0x4d, 0x43, 0x51, 0x5f, 0x75, 0x7b, 0x69, 0x67, 0x3d, 0x33, 0x21, 0x2f, 0x05, 0x0b, 0x19, 0x17 }, /*6*/ { 0x76, 0x78, 0x6a, 0x64, 0x4e, 0x40, 0x52, 0x5c, 0x06, 0x08, 0x1a, 0x14, 0x3e, 0x30, 0x22, 0x2c }, /*7*/ { 0x96, 0x98, 0x8a, 0x84, 0xae, 0xa0, 0xb2, 0xbc, 0xe6, 0xe8, 0xfa, 0xf4, 0xde, 0xd0, 0xc2, 0xcc }, /*8*/ { 0x41, 0x4f, 0x5d, 0x53, 0x79, 0x77, 0x65, 0x6b, 0x31, 0x3f, 0x2d, 0x23, 0x09, 0x07, 0x15, 0x1b }, /*9*/ { 0xa1, 0xaf, 0xbd, 0xb3, 0x99, 0x97, 0x85, 0x8b, 0xd1, 0xdf, 0xcd, 0xc3, 0xe9, 0xe7, 0xf5, 0xfb }, /*a*/ { 0x9a, 0x94, 0x86, 0x88, 0xa2, 0xac, 0xbe, 0xb0, 0xea, 0xe4, 0xf6, 0xf8, 0xd2, 0xdc, 0xce, 0xc0 }, /*b*/ { 0x7a, 0x74, 0x66, 0x68, 0x42, 0x4c, 0x5e, 0x50, 0x0a, 0x04, 0x16, 0x18, 0x32, 0x3c, 0x2e, 0x20 }, /*c*/ { 0xec, 0xe2, 0xf0, 0xfe, 0xd4, 0xda, 0xc8, 0xc6, 0x9c, 0x92, 0x80, 0x8e, 0xa4, 0xaa, 0xb8, 0xb6 }, /*d*/ { 0x0c, 0x02, 0x10, 0x1e, 0x34, 0x3a, 0x28, 0x26, 0x7c, 0x72, 0x60, 0x6e, 0x44, 0x4a, 0x58, 0x56 }, /*e*/ { 0x37, 0x39, 0x2b, 0x25, 0x0f, 0x01, 0x13, 0x1d, 0x47, 0x49, 0x5b, 0x55, 0x7f, 0x71, 0x63, 0x6d }, /*f*/ { 0xd7, 0xd9, 0xcb, 0xc5, 0xef, 0xe1, 0xf3, 0xfd, 0xa7, 0xa9, 0xbb, 0xb5, 0x9f, 0x91, 0x83, 0x8d }, }; static OAES_RET oaes_sub_byte( uint8_t * byte ) { size_t _x, _y; if( NULL == byte ) return OAES_RET_ARG1; _x = _y = *byte; _x &= 0x0f; _y &= 0xf0; _y >>= 4; *byte = oaes_sub_byte_value[_y][_x]; return OAES_RET_SUCCESS; } static OAES_RET oaes_inv_sub_byte( uint8_t * byte ) { size_t _x, _y; if( NULL == byte ) return OAES_RET_ARG1; _x = _y = *byte; _x &= 0x0f; _y &= 0xf0; _y >>= 4; *byte = oaes_inv_sub_byte_value[_y][_x]; return OAES_RET_SUCCESS; } /* static OAES_RET oaes_word_rot_right( uint8_t word[OAES_COL_LEN] ) { uint8_t _temp[OAES_COL_LEN]; if( NULL == word ) return OAES_RET_ARG1; memcpy( _temp + 1, word, OAES_COL_LEN - 1 ); _temp[0] = word[OAES_COL_LEN - 1]; memcpy( word, _temp, OAES_COL_LEN ); return OAES_RET_SUCCESS; } */ static OAES_RET oaes_word_rot_left( uint8_t word[OAES_COL_LEN] ) { uint8_t _temp[OAES_COL_LEN]; if( NULL == word ) return OAES_RET_ARG1; memcpy( _temp, word + 1, OAES_COL_LEN - 1 ); _temp[OAES_COL_LEN - 1] = word[0]; memcpy( word, _temp, OAES_COL_LEN ); return OAES_RET_SUCCESS; } static OAES_RET oaes_shift_rows( uint8_t block[OAES_BLOCK_SIZE] ) { uint8_t _temp[OAES_BLOCK_SIZE]; if( NULL == block ) return OAES_RET_ARG1; _temp[0x00] = block[0x00]; _temp[0x01] = block[0x05]; _temp[0x02] = block[0x0a]; _temp[0x03] = block[0x0f]; _temp[0x04] = block[0x04]; _temp[0x05] = block[0x09]; _temp[0x06] = block[0x0e]; _temp[0x07] = block[0x03]; _temp[0x08] = block[0x08]; _temp[0x09] = block[0x0d]; _temp[0x0a] = block[0x02]; _temp[0x0b] = block[0x07]; _temp[0x0c] = block[0x0c]; _temp[0x0d] = block[0x01]; _temp[0x0e] = block[0x06]; _temp[0x0f] = block[0x0b]; memcpy( block, _temp, OAES_BLOCK_SIZE ); return OAES_RET_SUCCESS; } static OAES_RET oaes_inv_shift_rows( uint8_t block[OAES_BLOCK_SIZE] ) { uint8_t _temp[OAES_BLOCK_SIZE]; if( NULL == block ) return OAES_RET_ARG1; _temp[0x00] = block[0x00]; _temp[0x01] = block[0x0d]; _temp[0x02] = block[0x0a]; _temp[0x03] = block[0x07]; _temp[0x04] = block[0x04]; _temp[0x05] = block[0x01]; _temp[0x06] = block[0x0e]; _temp[0x07] = block[0x0b]; _temp[0x08] = block[0x08]; _temp[0x09] = block[0x05]; _temp[0x0a] = block[0x02]; _temp[0x0b] = block[0x0f]; _temp[0x0c] = block[0x0c]; _temp[0x0d] = block[0x09]; _temp[0x0e] = block[0x06]; _temp[0x0f] = block[0x03]; memcpy( block, _temp, OAES_BLOCK_SIZE ); return OAES_RET_SUCCESS; } static uint8_t oaes_gf_mul(uint8_t left, uint8_t right) { size_t _x, _y; _x = _y = left; _x &= 0x0f; _y &= 0xf0; _y >>= 4; switch( right ) { case 0x02: return oaes_gf_mul_2[_y][_x]; break; case 0x03: return oaes_gf_mul_3[_y][_x]; break; case 0x09: return oaes_gf_mul_9[_y][_x]; break; case 0x0b: return oaes_gf_mul_b[_y][_x]; break; case 0x0d: return oaes_gf_mul_d[_y][_x]; break; case 0x0e: return oaes_gf_mul_e[_y][_x]; break; default: return left; break; } } static OAES_RET oaes_mix_cols( uint8_t word[OAES_COL_LEN] ) { uint8_t _temp[OAES_COL_LEN]; if( NULL == word ) return OAES_RET_ARG1; _temp[0] = oaes_gf_mul(word[0], 0x02) ^ oaes_gf_mul( word[1], 0x03 ) ^ word[2] ^ word[3]; _temp[1] = word[0] ^ oaes_gf_mul( word[1], 0x02 ) ^ oaes_gf_mul( word[2], 0x03 ) ^ word[3]; _temp[2] = word[0] ^ word[1] ^ oaes_gf_mul( word[2], 0x02 ) ^ oaes_gf_mul( word[3], 0x03 ); _temp[3] = oaes_gf_mul( word[0], 0x03 ) ^ word[1] ^ word[2] ^ oaes_gf_mul( word[3], 0x02 ); memcpy( word, _temp, OAES_COL_LEN ); return OAES_RET_SUCCESS; } static OAES_RET oaes_inv_mix_cols( uint8_t word[OAES_COL_LEN] ) { uint8_t _temp[OAES_COL_LEN]; if( NULL == word ) return OAES_RET_ARG1; _temp[0] = oaes_gf_mul( word[0], 0x0e ) ^ oaes_gf_mul( word[1], 0x0b ) ^ oaes_gf_mul( word[2], 0x0d ) ^ oaes_gf_mul( word[3], 0x09 ); _temp[1] = oaes_gf_mul( word[0], 0x09 ) ^ oaes_gf_mul( word[1], 0x0e ) ^ oaes_gf_mul( word[2], 0x0b ) ^ oaes_gf_mul( word[3], 0x0d ); _temp[2] = oaes_gf_mul( word[0], 0x0d ) ^ oaes_gf_mul( word[1], 0x09 ) ^ oaes_gf_mul( word[2], 0x0e ) ^ oaes_gf_mul( word[3], 0x0b ); _temp[3] = oaes_gf_mul( word[0], 0x0b ) ^ oaes_gf_mul( word[1], 0x0d ) ^ oaes_gf_mul( word[2], 0x09 ) ^ oaes_gf_mul( word[3], 0x0e ); memcpy( word, _temp, OAES_COL_LEN ); return OAES_RET_SUCCESS; } OAES_RET oaes_sprintf( char * buf, size_t * buf_len, const uint8_t * data, size_t data_len ) { size_t _i, _buf_len_in; char _temp[4]; if( NULL == buf_len ) return OAES_RET_ARG2; _buf_len_in = *buf_len; *buf_len = data_len * 3 + data_len / OAES_BLOCK_SIZE + 1; if( NULL == buf ) return OAES_RET_SUCCESS; if( *buf_len > _buf_len_in ) return OAES_RET_BUF; if( NULL == data ) return OAES_RET_ARG3; strcpy( buf, "" ); for( _i = 0; _i < data_len; _i++ ) { sprintf( _temp, "%02x ", data[_i] ); strcat( buf, _temp ); if( _i && 0 == ( _i + 1 ) % OAES_BLOCK_SIZE ) strcat( buf, "\n" ); } return OAES_RET_SUCCESS; } #ifdef OAES_HAVE_ISAAC static void oaes_get_seed( char buf[RANDSIZ + 1] ) { #if !defined(__FreeBSD__) && !defined(__OpenBSD__) && !defined(__NetBSD__) struct timeb timer; struct tm *gmTimer; char * _test = NULL; ftime (&timer); gmTimer = gmtime( &timer.time ); _test = (char *) calloc( sizeof( char ), timer.millitm ); sprintf( buf, "%04d%02d%02d%02d%02d%02d%03d%p%d", gmTimer->tm_year + 1900, gmTimer->tm_mon + 1, gmTimer->tm_mday, gmTimer->tm_hour, gmTimer->tm_min, gmTimer->tm_sec, timer.millitm, _test + timer.millitm, GETPID() ); #else struct timeval timer; struct tm *gmTimer; char * _test = NULL; gettimeofday(&timer, NULL); gmTimer = gmtime( &timer.tv_sec ); _test = (char *) calloc( sizeof( char ), timer.tv_usec/1000 ); sprintf( buf, "%04d%02d%02d%02d%02d%02d%03d%p%d", gmTimer->tm_year + 1900, gmTimer->tm_mon + 1, gmTimer->tm_mday, gmTimer->tm_hour, gmTimer->tm_min, gmTimer->tm_sec, timer.tv_usec/1000, _test + timer.tv_usec/1000, GETPID() ); #endif if( _test ) free( _test ); } #else static uint32_t oaes_get_seed(void) { #if !defined(__FreeBSD__) && !defined(__OpenBSD__) && !defined(__ANDROID__) && !defined(__NetBSD__) struct timeb timer; struct tm *gmTimer; char * _test = NULL; uint32_t _ret = 0; ftime (&timer); gmTimer = gmtime( &timer.time ); _test = (char *) calloc( sizeof( char ), timer.millitm ); _ret = gmTimer->tm_year + 1900 + gmTimer->tm_mon + 1 + gmTimer->tm_mday + gmTimer->tm_hour + gmTimer->tm_min + gmTimer->tm_sec + timer.millitm + (uintptr_t) ( _test + timer.millitm ) + GETPID(); #else struct timeval timer; struct tm *gmTimer; char * _test = NULL; uint32_t _ret = 0; gettimeofday(&timer, NULL); gmTimer = gmtime( &timer.tv_sec ); _test = (char *) calloc( sizeof( char ), timer.tv_usec/1000 ); _ret = gmTimer->tm_year + 1900 + gmTimer->tm_mon + 1 + gmTimer->tm_mday + gmTimer->tm_hour + gmTimer->tm_min + gmTimer->tm_sec + timer.tv_usec/1000 + (uintptr_t) ( _test + timer.tv_usec/1000 ) + GETPID(); #endif if( _test ) free( _test ); return _ret; } #endif // OAES_HAVE_ISAAC static OAES_RET oaes_key_destroy( oaes_key ** key ) { if( NULL == *key ) return OAES_RET_SUCCESS; if( (*key)->data ) { free( (*key)->data ); (*key)->data = NULL; } if( (*key)->exp_data ) { free( (*key)->exp_data ); (*key)->exp_data = NULL; } (*key)->data_len = 0; (*key)->exp_data_len = 0; (*key)->num_keys = 0; (*key)->key_base = 0; free( *key ); *key = NULL; return OAES_RET_SUCCESS; } static OAES_RET oaes_key_expand( OAES_CTX * ctx ) { size_t _i, _j; oaes_ctx * _ctx = (oaes_ctx *) ctx; if( NULL == _ctx ) return OAES_RET_ARG1; if( NULL == _ctx->key ) return OAES_RET_NOKEY; _ctx->key->key_base = _ctx->key->data_len / OAES_RKEY_LEN; _ctx->key->num_keys = _ctx->key->key_base + OAES_ROUND_BASE; _ctx->key->exp_data_len = _ctx->key->num_keys * OAES_RKEY_LEN * OAES_COL_LEN; _ctx->key->exp_data = (uint8_t *) calloc( _ctx->key->exp_data_len, sizeof( uint8_t )); if( NULL == _ctx->key->exp_data ) return OAES_RET_MEM; // the first _ctx->key->data_len are a direct copy memcpy( _ctx->key->exp_data, _ctx->key->data, _ctx->key->data_len ); // apply ExpandKey algorithm for remainder for( _i = _ctx->key->key_base; _i < _ctx->key->num_keys * OAES_RKEY_LEN; _i++ ) { uint8_t _temp[OAES_COL_LEN]; memcpy( _temp, _ctx->key->exp_data + ( _i - 1 ) * OAES_RKEY_LEN, OAES_COL_LEN ); // transform key column if( 0 == _i % _ctx->key->key_base ) { oaes_word_rot_left( _temp ); for( _j = 0; _j < OAES_COL_LEN; _j++ ) oaes_sub_byte( _temp + _j ); _temp[0] = _temp[0] ^ oaes_gf_8[ _i / _ctx->key->key_base - 1 ]; } else if( _ctx->key->key_base > 6 && 4 == _i % _ctx->key->key_base ) { for( _j = 0; _j < OAES_COL_LEN; _j++ ) oaes_sub_byte( _temp + _j ); } for( _j = 0; _j < OAES_COL_LEN; _j++ ) { _ctx->key->exp_data[ _i * OAES_RKEY_LEN + _j ] = _ctx->key->exp_data[ ( _i - _ctx->key->key_base ) * OAES_RKEY_LEN + _j ] ^ _temp[_j]; } } return OAES_RET_SUCCESS; } static OAES_RET oaes_key_gen( OAES_CTX * ctx, size_t key_size ) { size_t _i; oaes_key * _key = NULL; oaes_ctx * _ctx = (oaes_ctx *) ctx; OAES_RET _rc = OAES_RET_SUCCESS; if( NULL == _ctx ) return OAES_RET_ARG1; _key = (oaes_key *) calloc( sizeof( oaes_key ), 1 ); if( NULL == _key ) return OAES_RET_MEM; if( _ctx->key ) oaes_key_destroy( &(_ctx->key) ); _key->data_len = key_size; _key->data = (uint8_t *) calloc( key_size, sizeof( uint8_t )); if( NULL == _key->data ) { free( _key ); return OAES_RET_MEM; } for( _i = 0; _i < key_size; _i++ ) #ifdef OAES_HAVE_ISAAC _key->data[_i] = (uint8_t) rand( _ctx->rctx ); #else _key->data[_i] = (uint8_t) rand(); #endif // OAES_HAVE_ISAAC _ctx->key = _key; _rc = _rc || oaes_key_expand( ctx ); if( _rc != OAES_RET_SUCCESS ) { oaes_key_destroy( &(_ctx->key) ); return _rc; } return OAES_RET_SUCCESS; } OAES_RET oaes_key_gen_128( OAES_CTX * ctx ) { return oaes_key_gen( ctx, 16 ); } OAES_RET oaes_key_gen_192( OAES_CTX * ctx ) { return oaes_key_gen( ctx, 24 ); } OAES_RET oaes_key_gen_256( OAES_CTX * ctx ) { return oaes_key_gen( ctx, 32 ); } OAES_RET oaes_key_export( OAES_CTX * ctx, uint8_t * data, size_t * data_len ) { size_t _data_len_in; oaes_ctx * _ctx = (oaes_ctx *) ctx; if( NULL == _ctx ) return OAES_RET_ARG1; if( NULL == _ctx->key ) return OAES_RET_NOKEY; if( NULL == data_len ) return OAES_RET_ARG3; _data_len_in = *data_len; // data + header *data_len = _ctx->key->data_len + OAES_BLOCK_SIZE; if( NULL == data ) return OAES_RET_SUCCESS; if( _data_len_in < *data_len ) return OAES_RET_BUF; // header memcpy( data, oaes_header, OAES_BLOCK_SIZE ); data[5] = 0x01; data[7] = _ctx->key->data_len; memcpy( data + OAES_BLOCK_SIZE, _ctx->key->data, _ctx->key->data_len ); return OAES_RET_SUCCESS; } OAES_RET oaes_key_export_data( OAES_CTX * ctx, uint8_t * data, size_t * data_len ) { size_t _data_len_in; oaes_ctx * _ctx = (oaes_ctx *) ctx; if( NULL == _ctx ) return OAES_RET_ARG1; if( NULL == _ctx->key ) return OAES_RET_NOKEY; if( NULL == data_len ) return OAES_RET_ARG3; _data_len_in = *data_len; *data_len = _ctx->key->data_len; if( NULL == data ) return OAES_RET_SUCCESS; if( _data_len_in < *data_len ) return OAES_RET_BUF; memcpy( data, _ctx->key->data, *data_len ); return OAES_RET_SUCCESS; } OAES_RET oaes_key_import( OAES_CTX * ctx, const uint8_t * data, size_t data_len ) { oaes_ctx * _ctx = (oaes_ctx *) ctx; OAES_RET _rc = OAES_RET_SUCCESS; int _key_length; if( NULL == _ctx ) return OAES_RET_ARG1; if( NULL == data ) return OAES_RET_ARG2; switch( data_len ) { case 16 + OAES_BLOCK_SIZE: case 24 + OAES_BLOCK_SIZE: case 32 + OAES_BLOCK_SIZE: break; default: return OAES_RET_ARG3; } // header if( 0 != memcmp( data, oaes_header, 4 ) ) return OAES_RET_HEADER; // header version switch( data[4] ) { case 0x01: break; default: return OAES_RET_HEADER; } // header type switch( data[5] ) { case 0x01: break; default: return OAES_RET_HEADER; } // options _key_length = data[7]; switch( _key_length ) { case 16: case 24: case 32: break; default: return OAES_RET_HEADER; } if( (int)data_len != _key_length + OAES_BLOCK_SIZE ) return OAES_RET_ARG3; if( _ctx->key ) oaes_key_destroy( &(_ctx->key) ); _ctx->key = (oaes_key *) calloc( sizeof( oaes_key ), 1 ); if( NULL == _ctx->key ) return OAES_RET_MEM; _ctx->key->data_len = _key_length; _ctx->key->data = (uint8_t *) calloc( _key_length, sizeof( uint8_t )); if( NULL == _ctx->key->data ) { oaes_key_destroy( &(_ctx->key) ); return OAES_RET_MEM; } memcpy( _ctx->key->data, data + OAES_BLOCK_SIZE, _key_length ); _rc = _rc || oaes_key_expand( ctx ); if( _rc != OAES_RET_SUCCESS ) { oaes_key_destroy( &(_ctx->key) ); return _rc; } return OAES_RET_SUCCESS; } OAES_RET oaes_key_import_data( OAES_CTX * ctx, const uint8_t * data, size_t data_len ) { oaes_ctx * _ctx = (oaes_ctx *) ctx; OAES_RET _rc = OAES_RET_SUCCESS; if( NULL == _ctx ) return OAES_RET_ARG1; if( NULL == data ) return OAES_RET_ARG2; switch( data_len ) { case 16: case 24: case 32: break; default: return OAES_RET_ARG3; } if( _ctx->key ) oaes_key_destroy( &(_ctx->key) ); _ctx->key = (oaes_key *) calloc( sizeof( oaes_key ), 1 ); if( NULL == _ctx->key ) return OAES_RET_MEM; _ctx->key->data_len = data_len; _ctx->key->data = (uint8_t *) calloc( data_len, sizeof( uint8_t )); if( NULL == _ctx->key->data ) { oaes_key_destroy( &(_ctx->key) ); return OAES_RET_MEM; } memcpy( _ctx->key->data, data, data_len ); _rc = _rc || oaes_key_expand( ctx ); if( _rc != OAES_RET_SUCCESS ) { oaes_key_destroy( &(_ctx->key) ); return _rc; } return OAES_RET_SUCCESS; } OAES_CTX * oaes_alloc(void) { oaes_ctx * _ctx = (oaes_ctx *) calloc( sizeof( oaes_ctx ), 1 ); if( NULL == _ctx ) return NULL; #ifdef OAES_HAVE_ISAAC { ub4 _i = 0; char _seed[RANDSIZ + 1]; _ctx->rctx = (randctx *) calloc( sizeof( randctx ), 1 ); if( NULL == _ctx->rctx ) { free( _ctx ); return NULL; } oaes_get_seed( _seed ); memset( _ctx->rctx->randrsl, 0, RANDSIZ ); memcpy( _ctx->rctx->randrsl, _seed, RANDSIZ ); randinit( _ctx->rctx, TRUE); } #else srand( oaes_get_seed() ); #endif // OAES_HAVE_ISAAC _ctx->key = NULL; oaes_set_option( _ctx, OAES_OPTION_CBC, NULL ); #ifdef OAES_DEBUG _ctx->step_cb = NULL; oaes_set_option( _ctx, OAES_OPTION_STEP_OFF, NULL ); #endif // OAES_DEBUG return (OAES_CTX *) _ctx; } OAES_RET oaes_free( OAES_CTX ** ctx ) { oaes_ctx ** _ctx = (oaes_ctx **) ctx; if( NULL == _ctx ) return OAES_RET_ARG1; if( NULL == *_ctx ) return OAES_RET_SUCCESS; if( (*_ctx)->key ) oaes_key_destroy( &((*_ctx)->key) ); #ifdef OAES_HAVE_ISAAC if( (*_ctx)->rctx ) { free( (*_ctx)->rctx ); (*_ctx)->rctx = NULL; } #endif // OAES_HAVE_ISAAC free( *_ctx ); *_ctx = NULL; return OAES_RET_SUCCESS; } OAES_RET oaes_set_option( OAES_CTX * ctx, OAES_OPTION option, const void * value ) { size_t _i; oaes_ctx * _ctx = (oaes_ctx *) ctx; if( NULL == _ctx ) return OAES_RET_ARG1; switch( option ) { case OAES_OPTION_ECB: _ctx->options &= ~OAES_OPTION_CBC; memset( _ctx->iv, 0, OAES_BLOCK_SIZE ); break; case OAES_OPTION_CBC: _ctx->options &= ~OAES_OPTION_ECB; if( value ) memcpy( _ctx->iv, value, OAES_BLOCK_SIZE ); else { for( _i = 0; _i < OAES_BLOCK_SIZE; _i++ ) #ifdef OAES_HAVE_ISAAC _ctx->iv[_i] = (uint8_t) rand( _ctx->rctx ); #else _ctx->iv[_i] = (uint8_t) rand(); #endif // OAES_HAVE_ISAAC } break; #ifdef OAES_DEBUG case OAES_OPTION_STEP_ON: if( value ) { _ctx->options &= ~OAES_OPTION_STEP_OFF; _ctx->step_cb = value; } else { _ctx->options &= ~OAES_OPTION_STEP_ON; _ctx->options |= OAES_OPTION_STEP_OFF; _ctx->step_cb = NULL; return OAES_RET_ARG3; } break; case OAES_OPTION_STEP_OFF: _ctx->options &= ~OAES_OPTION_STEP_ON; _ctx->step_cb = NULL; break; #endif // OAES_DEBUG default: return OAES_RET_ARG2; } _ctx->options |= option; return OAES_RET_SUCCESS; } static OAES_RET oaes_encrypt_block( OAES_CTX * ctx, uint8_t * c, size_t c_len ) { size_t _i, _j; oaes_ctx * _ctx = (oaes_ctx *) ctx; if( NULL == _ctx ) return OAES_RET_ARG1; if( NULL == c ) return OAES_RET_ARG2; if( c_len != OAES_BLOCK_SIZE ) return OAES_RET_ARG3; if( NULL == _ctx->key ) return OAES_RET_NOKEY; #ifdef OAES_DEBUG if( _ctx->step_cb ) _ctx->step_cb( c, "input", 1, NULL ); #endif // OAES_DEBUG // AddRoundKey(State, K0) for( _i = 0; _i < c_len; _i++ ) c[_i] = c[_i] ^ _ctx->key->exp_data[_i]; #ifdef OAES_DEBUG if( _ctx->step_cb ) { _ctx->step_cb( _ctx->key->exp_data, "k_sch", 1, NULL ); _ctx->step_cb( c, "k_add", 1, NULL ); } #endif // OAES_DEBUG // for round = 1 step 1 to Nr–1 for( _i = 1; _i < _ctx->key->num_keys - 1; _i++ ) { // SubBytes(state) for( _j = 0; _j < c_len; _j++ ) oaes_sub_byte( c + _j ); #ifdef OAES_DEBUG if( _ctx->step_cb ) _ctx->step_cb( c, "s_box", _i, NULL ); #endif // OAES_DEBUG // ShiftRows(state) oaes_shift_rows( c ); #ifdef OAES_DEBUG if( _ctx->step_cb ) _ctx->step_cb( c, "s_row", _i, NULL ); #endif // OAES_DEBUG // MixColumns(state) oaes_mix_cols( c ); oaes_mix_cols( c + 4 ); oaes_mix_cols( c + 8 ); oaes_mix_cols( c + 12 ); #ifdef OAES_DEBUG if( _ctx->step_cb ) _ctx->step_cb( c, "m_col", _i, NULL ); #endif // OAES_DEBUG // AddRoundKey(state, w[round*Nb, (round+1)*Nb-1]) for( _j = 0; _j < c_len; _j++ ) c[_j] = c[_j] ^ _ctx->key->exp_data[_i * OAES_RKEY_LEN * OAES_COL_LEN + _j]; #ifdef OAES_DEBUG if( _ctx->step_cb ) { _ctx->step_cb( _ctx->key->exp_data + _i * OAES_RKEY_LEN * OAES_COL_LEN, "k_sch", _i, NULL ); _ctx->step_cb( c, "k_add", _i, NULL ); } #endif // OAES_DEBUG } // SubBytes(state) for( _i = 0; _i < c_len; _i++ ) oaes_sub_byte( c + _i ); #ifdef OAES_DEBUG if( _ctx->step_cb ) _ctx->step_cb( c, "s_box", _ctx->key->num_keys - 1, NULL ); #endif // OAES_DEBUG // ShiftRows(state) oaes_shift_rows( c ); #ifdef OAES_DEBUG if( _ctx->step_cb ) _ctx->step_cb( c, "s_row", _ctx->key->num_keys - 1, NULL ); #endif // OAES_DEBUG // AddRoundKey(state, w[Nr*Nb, (Nr+1)*Nb-1]) for( _i = 0; _i < c_len; _i++ ) c[_i] = c[_i] ^ _ctx->key->exp_data[ ( _ctx->key->num_keys - 1 ) * OAES_RKEY_LEN * OAES_COL_LEN + _i ]; #ifdef OAES_DEBUG if( _ctx->step_cb ) { _ctx->step_cb( _ctx->key->exp_data + ( _ctx->key->num_keys - 1 ) * OAES_RKEY_LEN * OAES_COL_LEN, "k_sch", _ctx->key->num_keys - 1, NULL ); _ctx->step_cb( c, "output", _ctx->key->num_keys - 1, NULL ); } #endif // OAES_DEBUG return OAES_RET_SUCCESS; } static OAES_RET oaes_decrypt_block( OAES_CTX * ctx, uint8_t * c, size_t c_len ) { size_t _i, _j; oaes_ctx * _ctx = (oaes_ctx *) ctx; if( NULL == _ctx ) return OAES_RET_ARG1; if( NULL == c ) return OAES_RET_ARG2; if( c_len != OAES_BLOCK_SIZE ) return OAES_RET_ARG3; if( NULL == _ctx->key ) return OAES_RET_NOKEY; #ifdef OAES_DEBUG if( _ctx->step_cb ) _ctx->step_cb( c, "iinput", _ctx->key->num_keys - 1, NULL ); #endif // OAES_DEBUG // AddRoundKey(state, w[Nr*Nb, (Nr+1)*Nb-1]) for( _i = 0; _i < c_len; _i++ ) c[_i] = c[_i] ^ _ctx->key->exp_data[ ( _ctx->key->num_keys - 1 ) * OAES_RKEY_LEN * OAES_COL_LEN + _i ]; #ifdef OAES_DEBUG if( _ctx->step_cb ) { _ctx->step_cb( _ctx->key->exp_data + ( _ctx->key->num_keys - 1 ) * OAES_RKEY_LEN * OAES_COL_LEN, "ik_sch", _ctx->key->num_keys - 1, NULL ); _ctx->step_cb( c, "ik_add", _ctx->key->num_keys - 1, NULL ); } #endif // OAES_DEBUG for( _i = _ctx->key->num_keys - 2; _i > 0; _i-- ) { // InvShiftRows(state) oaes_inv_shift_rows( c ); #ifdef OAES_DEBUG if( _ctx->step_cb ) _ctx->step_cb( c, "is_row", _i, NULL ); #endif // OAES_DEBUG // InvSubBytes(state) for( _j = 0; _j < c_len; _j++ ) oaes_inv_sub_byte( c + _j ); #ifdef OAES_DEBUG if( _ctx->step_cb ) _ctx->step_cb( c, "is_box", _i, NULL ); #endif // OAES_DEBUG // AddRoundKey(state, w[round*Nb, (round+1)*Nb-1]) for( _j = 0; _j < c_len; _j++ ) c[_j] = c[_j] ^ _ctx->key->exp_data[_i * OAES_RKEY_LEN * OAES_COL_LEN + _j]; #ifdef OAES_DEBUG if( _ctx->step_cb ) { _ctx->step_cb( _ctx->key->exp_data + _i * OAES_RKEY_LEN * OAES_COL_LEN, "ik_sch", _i, NULL ); _ctx->step_cb( c, "ik_add", _i, NULL ); } #endif // OAES_DEBUG // InvMixColums(state) oaes_inv_mix_cols( c ); oaes_inv_mix_cols( c + 4 ); oaes_inv_mix_cols( c + 8 ); oaes_inv_mix_cols( c + 12 ); #ifdef OAES_DEBUG if( _ctx->step_cb ) _ctx->step_cb( c, "im_col", _i, NULL ); #endif // OAES_DEBUG } // InvShiftRows(state) oaes_inv_shift_rows( c ); #ifdef OAES_DEBUG if( _ctx->step_cb ) _ctx->step_cb( c, "is_row", 1, NULL ); #endif // OAES_DEBUG // InvSubBytes(state) for( _i = 0; _i < c_len; _i++ ) oaes_inv_sub_byte( c + _i ); #ifdef OAES_DEBUG if( _ctx->step_cb ) _ctx->step_cb( c, "is_box", 1, NULL ); #endif // OAES_DEBUG // AddRoundKey(state, w[0, Nb-1]) for( _i = 0; _i < c_len; _i++ ) c[_i] = c[_i] ^ _ctx->key->exp_data[_i]; #ifdef OAES_DEBUG if( _ctx->step_cb ) { _ctx->step_cb( _ctx->key->exp_data, "ik_sch", 1, NULL ); _ctx->step_cb( c, "ioutput", 1, NULL ); } #endif // OAES_DEBUG return OAES_RET_SUCCESS; } OAES_RET oaes_encrypt( OAES_CTX * ctx, const uint8_t * m, size_t m_len, uint8_t * c, size_t * c_len ) { size_t _i, _j, _c_len_in, _c_data_len; size_t _pad_len = m_len % OAES_BLOCK_SIZE == 0 ? 0 : OAES_BLOCK_SIZE - m_len % OAES_BLOCK_SIZE; oaes_ctx * _ctx = (oaes_ctx *) ctx; OAES_RET _rc = OAES_RET_SUCCESS; uint8_t _flags = _pad_len ? OAES_FLAG_PAD : 0; if( NULL == _ctx ) return OAES_RET_ARG1; if( NULL == m ) return OAES_RET_ARG2; if( NULL == c_len ) return OAES_RET_ARG5; _c_len_in = *c_len; // data + pad _c_data_len = m_len + _pad_len; // header + iv + data + pad *c_len = 2 * OAES_BLOCK_SIZE + m_len + _pad_len; if( NULL == c ) return OAES_RET_SUCCESS; if( _c_len_in < *c_len ) return OAES_RET_BUF; if( NULL == _ctx->key ) return OAES_RET_NOKEY; // header memcpy(c, oaes_header, OAES_BLOCK_SIZE ); memcpy(c + 6, &_ctx->options, sizeof(_ctx->options)); memcpy(c + 8, &_flags, sizeof(_flags)); // iv memcpy(c + OAES_BLOCK_SIZE, _ctx->iv, OAES_BLOCK_SIZE ); // data memcpy(c + 2 * OAES_BLOCK_SIZE, m, m_len ); for( _i = 0; _i < _c_data_len; _i += OAES_BLOCK_SIZE ) { uint8_t _block[OAES_BLOCK_SIZE]; size_t _block_size = min( m_len - _i, OAES_BLOCK_SIZE ); memcpy( _block, c + 2 * OAES_BLOCK_SIZE + _i, _block_size ); // insert pad for( _j = 0; _j < OAES_BLOCK_SIZE - _block_size; _j++ ) _block[ _block_size + _j ] = _j + 1; // CBC if( _ctx->options & OAES_OPTION_CBC ) { for( _j = 0; _j < OAES_BLOCK_SIZE; _j++ ) _block[_j] = _block[_j] ^ _ctx->iv[_j]; } _rc = _rc || oaes_encrypt_block( ctx, _block, OAES_BLOCK_SIZE ); memcpy( c + 2 * OAES_BLOCK_SIZE + _i, _block, OAES_BLOCK_SIZE ); if( _ctx->options & OAES_OPTION_CBC ) memcpy( _ctx->iv, _block, OAES_BLOCK_SIZE ); } return _rc; } OAES_RET oaes_decrypt( OAES_CTX * ctx, const uint8_t * c, size_t c_len, uint8_t * m, size_t * m_len ) { size_t _i, _j, _m_len_in; oaes_ctx * _ctx = (oaes_ctx *) ctx; OAES_RET _rc = OAES_RET_SUCCESS; uint8_t _iv[OAES_BLOCK_SIZE]; uint8_t _flags; OAES_OPTION _options; if( NULL == ctx ) return OAES_RET_ARG1; if( NULL == c ) return OAES_RET_ARG2; if( c_len % OAES_BLOCK_SIZE ) return OAES_RET_ARG3; if( NULL == m_len ) return OAES_RET_ARG5; _m_len_in = *m_len; *m_len = c_len - 2 * OAES_BLOCK_SIZE; if( NULL == m ) return OAES_RET_SUCCESS; if( _m_len_in < *m_len ) return OAES_RET_BUF; if( NULL == _ctx->key ) return OAES_RET_NOKEY; // header if( 0 != memcmp( c, oaes_header, 4 ) ) return OAES_RET_HEADER; // header version switch( c[4] ) { case 0x01: break; default: return OAES_RET_HEADER; } // header type switch( c[5] ) { case 0x02: break; default: return OAES_RET_HEADER; } // options memcpy(&_options, c + 6, sizeof(_options)); // validate that all options are valid if( _options & ~( OAES_OPTION_ECB | OAES_OPTION_CBC #ifdef OAES_DEBUG | OAES_OPTION_STEP_ON | OAES_OPTION_STEP_OFF #endif // OAES_DEBUG ) ) return OAES_RET_HEADER; if( ( _options & OAES_OPTION_ECB ) && ( _options & OAES_OPTION_CBC ) ) return OAES_RET_HEADER; if( _options == OAES_OPTION_NONE ) return OAES_RET_HEADER; // flags memcpy(&_flags, c + 8, sizeof(_flags)); // validate that all flags are valid if( _flags & ~( OAES_FLAG_PAD ) ) return OAES_RET_HEADER; // iv memcpy( _iv, c + OAES_BLOCK_SIZE, OAES_BLOCK_SIZE); // data + pad memcpy( m, c + 2 * OAES_BLOCK_SIZE, *m_len ); for( _i = 0; _i < *m_len; _i += OAES_BLOCK_SIZE ) { if( ( _options & OAES_OPTION_CBC ) && _i > 0 ) memcpy( _iv, c + OAES_BLOCK_SIZE + _i, OAES_BLOCK_SIZE ); _rc = _rc || oaes_decrypt_block( ctx, m + _i, min( *m_len - _i, OAES_BLOCK_SIZE ) ); // CBC if( _options & OAES_OPTION_CBC ) { for( _j = 0; _j < OAES_BLOCK_SIZE; _j++ ) m[ _i + _j ] = m[ _i + _j ] ^ _iv[_j]; } } // remove pad if( _flags & OAES_FLAG_PAD ) { int _is_pad = 1; size_t _temp = (size_t) m[*m_len - 1]; if( _temp <= 0x00 || _temp > 0x0f ) return OAES_RET_HEADER; for( _i = 0; _i < _temp; _i++ ) if( m[*m_len - 1 - _i] != _temp - _i ) _is_pad = 0; if( _is_pad ) { memset( m + *m_len - _temp, 0, _temp ); *m_len -= _temp; } else return OAES_RET_HEADER; } return OAES_RET_SUCCESS; } OAES_API OAES_RET oaes_encryption_round( const uint8_t * key, uint8_t * c ) { size_t _i; if( NULL == key ) return OAES_RET_ARG1; if( NULL == c ) return OAES_RET_ARG2; // SubBytes(state) for( _i = 0; _i < OAES_BLOCK_SIZE; _i++ ) oaes_sub_byte( c + _i ); // ShiftRows(state) oaes_shift_rows( c ); // MixColumns(state) oaes_mix_cols( c ); oaes_mix_cols( c + 4 ); oaes_mix_cols( c + 8 ); oaes_mix_cols( c + 12 ); // AddRoundKey(State, key) for( _i = 0; _i < OAES_BLOCK_SIZE; _i++ ) c[_i] ^= key[_i]; return OAES_RET_SUCCESS; } OAES_API OAES_RET oaes_pseudo_encrypt_ecb( OAES_CTX * ctx, uint8_t * c ) { size_t _i; oaes_ctx * _ctx = (oaes_ctx *) ctx; if( NULL == _ctx ) return OAES_RET_ARG1; if( NULL == c ) return OAES_RET_ARG2; if( NULL == _ctx->key ) return OAES_RET_NOKEY; for ( _i = 0; _i < 10; ++_i ) { oaes_encryption_round( &_ctx->key->exp_data[_i * OAES_RKEY_LEN * OAES_COL_LEN], c ); } return OAES_RET_SUCCESS; }