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New scheme key destination contrfol

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Implies protocol version management.
This commit is contained in:
cslashm 2018-12-11 10:20:21 +01:00
parent 31bdf7bd11
commit 460da140ec
7 changed files with 233 additions and 63 deletions
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45
src/cryptonote_core/cryptonote_tx_utils.cpp
View file

@ -405,49 +405,12 @@ namespace cryptonote
for(const tx_destination_entry& dst_entr: destinations)
{
CHECK_AND_ASSERT_MES(dst_entr.amount > 0 || tx.version > 1, false, "Destination with wrong amount: " << dst_entr.amount);
crypto::key_derivation derivation;
crypto::public_key out_eph_public_key;
// make additional tx pubkey if necessary
keypair additional_txkey;
if (need_additional_txkeys)
{
additional_txkey.sec = additional_tx_keys[output_index];
if (dst_entr.is_subaddress)
additional_txkey.pub = rct::rct2pk(hwdev.scalarmultKey(rct::pk2rct(dst_entr.addr.m_spend_public_key), rct::sk2rct(additional_txkey.sec)));
else
additional_txkey.pub = rct::rct2pk(hwdev.scalarmultBase(rct::sk2rct(additional_txkey.sec)));
}
bool r;
if (change_addr && dst_entr.addr == *change_addr)
{
// sending change to yourself; derivation = a*R
r = hwdev.generate_key_derivation(txkey_pub, sender_account_keys.m_view_secret_key, derivation);
CHECK_AND_ASSERT_MES(r, false, "at creation outs: failed to generate_key_derivation(" << txkey_pub << ", " << sender_account_keys.m_view_secret_key << ")");
}
else
{
// sending to the recipient; derivation = r*A (or s*C in the subaddress scheme)
r = hwdev.generate_key_derivation(dst_entr.addr.m_view_public_key, dst_entr.is_subaddress && need_additional_txkeys ? additional_txkey.sec : tx_key, derivation);
CHECK_AND_ASSERT_MES(r, false, "at creation outs: failed to generate_key_derivation(" << dst_entr.addr.m_view_public_key << ", " << (dst_entr.is_subaddress && need_additional_txkeys ? additional_txkey.sec : tx_key) << ")");
}
if (need_additional_txkeys)
{
additional_tx_public_keys.push_back(additional_txkey.pub);
}
if (tx.version > 1)
{
crypto::secret_key scalar1;
hwdev.derivation_to_scalar(derivation, output_index, scalar1);
amount_keys.push_back(rct::sk2rct(scalar1));
}
r = hwdev.derive_public_key(derivation, output_index, dst_entr.addr.m_spend_public_key, out_eph_public_key);
CHECK_AND_ASSERT_MES(r, false, "at creation outs: failed to derive_public_key(" << derivation << ", " << output_index << ", "<< dst_entr.addr.m_spend_public_key << ")");
hwdev.add_output_key_mapping(dst_entr.addr.m_view_public_key, dst_entr.addr.m_spend_public_key, dst_entr.is_subaddress, output_index, amount_keys.back(), out_eph_public_key);
hwdev.generate_output_ephemeral_keys(tx.version,sender_account_keys, txkey_pub, tx_key,
dst_entr, change_addr, output_index,
need_additional_txkeys, additional_tx_keys,
additional_tx_public_keys, amount_keys, out_eph_public_key);
tx_out out;
out.amount = dst_entr.amount;

6
src/cryptonote_core/cryptonote_tx_utils.h
View file

@ -97,6 +97,12 @@ namespace cryptonote
bool construct_tx(const account_keys& sender_account_keys, std::vector<tx_source_entry> &sources, const std::vector<tx_destination_entry>& destinations, const boost::optional<cryptonote::account_public_address>& change_addr, const std::vector<uint8_t> &extra, transaction& tx, uint64_t unlock_time);
bool construct_tx_with_tx_key(const account_keys& sender_account_keys, const std::unordered_map<crypto::public_key, subaddress_index>& subaddresses, std::vector<tx_source_entry>& sources, std::vector<tx_destination_entry>& destinations, const boost::optional<cryptonote::account_public_address>& change_addr, const std::vector<uint8_t> &extra, transaction& tx, uint64_t unlock_time, const crypto::secret_key &tx_key, const std::vector<crypto::secret_key> &additional_tx_keys, bool rct = false, const rct::RCTConfig &rct_config = { rct::RangeProofBorromean, 0 }, rct::multisig_out *msout = NULL, bool shuffle_outs = true);
bool construct_tx_and_get_tx_key(const account_keys& sender_account_keys, const std::unordered_map<crypto::public_key, subaddress_index>& subaddresses, std::vector<tx_source_entry>& sources, std::vector<tx_destination_entry>& destinations, const boost::optional<cryptonote::account_public_address>& change_addr, const std::vector<uint8_t> &extra, transaction& tx, uint64_t unlock_time, crypto::secret_key &tx_key, std::vector<crypto::secret_key> &additional_tx_keys, bool rct = false, const rct::RCTConfig &rct_config = { rct::RangeProofBorromean, 0 }, rct::multisig_out *msout = NULL);
bool generate_output_ephemeral_keys(const size_t tx_version, const cryptonote::account_keys &sender_account_keys, const crypto::public_key &txkey_pub, const crypto::secret_key &tx_key,
const cryptonote::tx_destination_entry &dst_entr, const boost::optional<cryptonote::account_public_address> &change_addr, const size_t output_index,
const bool &need_additional_txkeys, const std::vector<crypto::secret_key> &additional_tx_keys,
std::vector<crypto::public_key> &additional_tx_public_keys,
std::vector<rct::key> &amount_keys,
crypto::public_key &out_eph_public_key) ;
bool generate_genesis_block(
block& bl

10
src/device/device.hpp
View file

@ -69,6 +69,7 @@ namespace cryptonote
struct account_public_address;
struct account_keys;
struct subaddress_index;
struct tx_destination_entry;
}
namespace hw {
@ -211,9 +212,12 @@ namespace hw {
virtual bool ecdhEncode(rct::ecdhTuple & unmasked, const rct::key & sharedSec, bool short_amount) = 0;
virtual bool ecdhDecode(rct::ecdhTuple & masked, const rct::key & sharedSec, bool short_amount) = 0;
virtual bool add_output_key_mapping(const crypto::public_key &Aout, const crypto::public_key &Bout, const bool is_subaddress, const size_t real_output_index,
const rct::key &amount_key, const crypto::public_key &out_eph_public_key) = 0;
virtual bool generate_output_ephemeral_keys(const size_t tx_version, const cryptonote::account_keys &sender_account_keys, const crypto::public_key &txkey_pub, const crypto::secret_key &tx_key,
const cryptonote::tx_destination_entry &dst_entr, const boost::optional<cryptonote::account_public_address> &change_addr, const size_t output_index,
const bool &need_additional_txkeys, const std::vector<crypto::secret_key> &additional_tx_keys,
std::vector<crypto::public_key> &additional_tx_public_keys,
std::vector<rct::key> &amount_keys,
crypto::public_key &out_eph_public_key) = 0;
virtual bool mlsag_prehash(const std::string &blob, size_t inputs_size, size_t outputs_size, const rct::keyV &hashes, const rct::ctkeyV &outPk, rct::key &prehash) = 0;
virtual bool mlsag_prepare(const rct::key &H, const rct::key &xx, rct::key &a, rct::key &aG, rct::key &aHP, rct::key &rvII) = 0;

53
src/device/device_default.cpp
View file

@ -34,8 +34,10 @@
#include "int-util.h"
#include "cryptonote_basic/account.h"
#include "cryptonote_basic/subaddress_index.h"
#include "cryptonote_core/cryptonote_tx_utils.h"
#include "ringct/rctOps.h"
#include "log.hpp"
#define ENCRYPTED_PAYMENT_ID_TAIL 0x8d
#define CHACHA8_KEY_TAIL 0x8c
@ -278,10 +280,55 @@ namespace hw {
return true;
}
bool device_default::generate_output_ephemeral_keys(const size_t tx_version,
const cryptonote::account_keys &sender_account_keys, const crypto::public_key &txkey_pub, const crypto::secret_key &tx_key,
const cryptonote::tx_destination_entry &dst_entr, const boost::optional<cryptonote::account_public_address> &change_addr, const size_t output_index,
const bool &need_additional_txkeys, const std::vector<crypto::secret_key> &additional_tx_keys,
std::vector<crypto::public_key> &additional_tx_public_keys,
std::vector<rct::key> &amount_keys, crypto::public_key &out_eph_public_key) {
bool device_default::add_output_key_mapping(const crypto::public_key &Aout, const crypto::public_key &Bout, const bool is_subaddress, const size_t real_output_index,
const rct::key &amount_key, const crypto::public_key &out_eph_public_key) {
return true;
crypto::key_derivation derivation;
// make additional tx pubkey if necessary
cryptonote::keypair additional_txkey;
if (need_additional_txkeys)
{
additional_txkey.sec = additional_tx_keys[output_index];
if (dst_entr.is_subaddress)
additional_txkey.pub = rct::rct2pk(rct::scalarmultKey(rct::pk2rct(dst_entr.addr.m_spend_public_key), rct::sk2rct(additional_txkey.sec)));
else
additional_txkey.pub = rct::rct2pk(rct::scalarmultBase(rct::sk2rct(additional_txkey.sec)));
}
bool r;
if (change_addr && dst_entr.addr == *change_addr)
{
// sending change to yourself; derivation = a*R
r = generate_key_derivation(txkey_pub, sender_account_keys.m_view_secret_key, derivation);
CHECK_AND_ASSERT_MES(r, false, "at creation outs: failed to generate_key_derivation(" << txkey_pub << ", " << sender_account_keys.m_view_secret_key << ")");
}
else
{
// sending to the recipient; derivation = r*A (or s*C in the subaddress scheme)
r = generate_key_derivation(dst_entr.addr.m_view_public_key, dst_entr.is_subaddress && need_additional_txkeys ? additional_txkey.sec : tx_key, derivation);
CHECK_AND_ASSERT_MES(r, false, "at creation outs: failed to generate_key_derivation(" << dst_entr.addr.m_view_public_key << ", " << (dst_entr.is_subaddress && need_additional_txkeys ? additional_txkey.sec : tx_key) << ")");
}
if (need_additional_txkeys)
{
additional_tx_public_keys.push_back(additional_txkey.pub);
}
if (tx_version > 1)
{
crypto::secret_key scalar1;
derivation_to_scalar(derivation, output_index, scalar1);
amount_keys.push_back(rct::sk2rct(scalar1));
}
r = derive_public_key(derivation, output_index, dst_entr.addr.m_spend_public_key, out_eph_public_key);
CHECK_AND_ASSERT_MES(r, false, "at creation outs: failed to derive_public_key(" << derivation << ", " << output_index << ", "<< dst_entr.addr.m_spend_public_key << ")");
return r;
}
bool device_default::encrypt_payment_id(crypto::hash8 &payment_id, const crypto::public_key &public_key, const crypto::secret_key &secret_key) {

9
src/device/device_default.hpp
View file

@ -114,9 +114,12 @@ namespace hw {
bool ecdhEncode(rct::ecdhTuple & unmasked, const rct::key & sharedSec, bool short_amount) override;
bool ecdhDecode(rct::ecdhTuple & masked, const rct::key & sharedSec, bool short_amount) override;
bool add_output_key_mapping(const crypto::public_key &Aout, const crypto::public_key &Bout, const bool is_subaddress, const size_t real_output_index,
const rct::key &amount_key, const crypto::public_key &out_eph_public_key) override;
bool generate_output_ephemeral_keys(const size_t tx_version, const cryptonote::account_keys &sender_account_keys, const crypto::public_key &txkey_pub, const crypto::secret_key &tx_key,
const cryptonote::tx_destination_entry &dst_entr, const boost::optional<cryptonote::account_public_address> &change_addr, const size_t output_index,
const bool &need_additional_txkeys, const std::vector<crypto::secret_key> &additional_tx_keys,
std::vector<crypto::public_key> &additional_tx_public_keys,
std::vector<rct::key> &amount_keys,
crypto::public_key &out_eph_public_key) override;
bool mlsag_prehash(const std::string &blob, size_t inputs_size, size_t outputs_size, const rct::keyV &hashes, const rct::ctkeyV &outPk, rct::key &prehash) override;
bool mlsag_prepare(const rct::key &H, const rct::key &xx, rct::key &a, rct::key &aG, rct::key &aHP, rct::key &rvII) override;

152
src/device/device_ledger.cpp
View file

@ -32,6 +32,7 @@
#include "ringct/rctOps.h"
#include "cryptonote_basic/account.h"
#include "cryptonote_basic/subaddress_index.h"
#include "cryptonote_core/cryptonote_tx_utils.h"
#include <boost/thread/locks.hpp>
#include <boost/thread/lock_guard.hpp>
@ -67,10 +68,12 @@ namespace hw {
/* === Keymap ==== */
/* ===================================================================== */
ABPkeys::ABPkeys(const rct::key& A, const rct::key& B, const bool is_subaddr, const size_t real_output_index, const rct::key& P, const rct::key& AK) {
ABPkeys::ABPkeys(const rct::key& A, const rct::key& B, const bool is_subaddr, const bool is_change, const bool need_additional_txkeys, const size_t real_output_index, const rct::key& P, const rct::key& AK) {
Aout = A;
Bout = B;
is_subaddress = is_subaddr;
is_change_address = is_change;
additional_key = need_additional_txkeys;
index = real_output_index;
Pout = P;
AKout = AK;
@ -80,6 +83,8 @@ namespace hw {
Aout = keys.Aout;
Bout = keys.Bout;
is_subaddress = keys.is_subaddress;
is_change_address = keys.is_change_address;
additional_key = keys.additional_key;
index = keys.index;
Pout = keys.Pout;
AKout = keys.AKout;
@ -137,6 +142,8 @@ namespace hw {
static int device_id = 0;
#define PROTOCOL_VERSION 2
#define INS_NONE 0x00
#define INS_RESET 0x02
@ -168,6 +175,7 @@ namespace hw {
#define INS_STEALTH 0x76
#define INS_BLIND 0x78
#define INS_UNBLIND 0x7A
#define INS_GEN_TXOUT_KEYS 0x7B
#define INS_VALIDATE 0x7C
#define INS_MLSAG 0x7E
#define INS_CLOSE_TX 0x80
@ -268,7 +276,7 @@ namespace hw {
int device_ledger::set_command_header(unsigned char ins, unsigned char p1, unsigned char p2) {
reset_buffer();
int offset = 0;
this->buffer_send[0] = 0x00;
this->buffer_send[0] = PROTOCOL_VERSION;
this->buffer_send[1] = ins;
this->buffer_send[2] = p1;
this->buffer_send[3] = p2;
@ -1160,10 +1168,139 @@ namespace hw {
return true;
}
bool device_ledger::add_output_key_mapping(const crypto::public_key &Aout, const crypto::public_key &Bout, const bool is_subaddress, const size_t real_output_index,
const rct::key &amount_key, const crypto::public_key &out_eph_public_key) {
bool device_ledger::generate_output_ephemeral_keys(const size_t tx_version, const cryptonote::account_keys &sender_account_keys, const crypto::public_key &txkey_pub, const crypto::secret_key &tx_key,
const cryptonote::tx_destination_entry &dst_entr, const boost::optional<cryptonote::account_public_address> &change_addr, const size_t output_index,
const bool &need_additional_txkeys, const std::vector<crypto::secret_key> &additional_tx_keys,
std::vector<crypto::public_key> &additional_tx_public_keys,
std::vector<rct::key> &amount_keys,
crypto::public_key &out_eph_public_key) {
AUTO_LOCK_CMD();
key_map.add(ABPkeys(rct::pk2rct(Aout),rct::pk2rct(Bout), is_subaddress, real_output_index, rct::pk2rct(out_eph_public_key), amount_key));
#ifdef DEBUG_HWDEVICE
const size_t &tx_version_x = tx_version;
const cryptonote::account_keys sender_account_keys_x = sender_account_keys;
memmove((void*)sender_account_keys_x.m_view_secret_key.data, dbg_viewkey.data, 32);
const crypto::public_key &txkey_pub_x = txkey_pub;
const crypto::secret_key &tx_key_x = tx_key;
const cryptonote::tx_destination_entry &dst_entr_x = dst_entr;
const boost::optional<cryptonote::account_public_address> &change_addr_x = change_addr;
const size_t &output_index_x = output_index;
const bool &need_additional_txkeys_x = need_additional_txkeys;
const std::vector<crypto::secret_key> &additional_tx_keys_x = additional_tx_keys;
std::vector<crypto::public_key> additional_tx_public_keys_x;
std::vector<rct::key> amount_keys_x;
crypto::public_key out_eph_public_key_x;
this->controle_device->generate_output_ephemeral_keys(tx_version_x, sender_account_keys_x, txkey_pub_x, tx_key_x, dst_entr_x, change_addr_x, output_index_x, need_additional_txkeys_x, additional_tx_keys_x,
additional_tx_public_keys_x, amount_keys_x, out_eph_public_key_x);
#endif
// make additional tx pubkey if necessary
cryptonote::keypair additional_txkey;
if (need_additional_txkeys) {
additional_txkey.sec = additional_tx_keys[output_index];
}
//compute derivation, out_eph_public_key, and amount key in one shot on device, to ensure checkable link
const crypto::secret_key *sec;
bool is_change;
if (change_addr && dst_entr.addr == *change_addr)
{
// sending change to yourself; derivation = a*R
is_change = true;
sec = &sender_account_keys.m_view_secret_key;
}
else
{
is_change = false;
if (dst_entr.is_subaddress && need_additional_txkeys) {
sec = &additional_txkey.sec;
} else {
sec = &tx_key;
}
}
int offset = set_command_header_noopt(INS_GEN_TXOUT_KEYS);
//tx_version
this->buffer_send[offset+0] = tx_version>>24;
this->buffer_send[offset+1] = tx_version>>16;
this->buffer_send[offset+2] = tx_version>>8;
this->buffer_send[offset+3] = tx_version>>0;
offset += 4;
//tx_sec
memmove(&this->buffer_send[offset], sec->data, 32);
offset += 32;
//Aout
memmove(&this->buffer_send[offset], dst_entr.addr.m_view_public_key.data, 32);
offset += 32;
//Bout
memmove(&this->buffer_send[offset], dst_entr.addr.m_spend_public_key.data, 32);
offset += 32;
//output index
this->buffer_send[offset+0] = output_index>>24;
this->buffer_send[offset+1] = output_index>>16;
this->buffer_send[offset+2] = output_index>>8;
this->buffer_send[offset+3] = output_index>>0;
offset += 4;
//is_change,
this->buffer_send[offset] = is_change;
offset++;
//is_subaddress
this->buffer_send[offset] = dst_entr.is_subaddress;
offset++;
//need_additional_key
this->buffer_send[offset] = need_additional_txkeys;
offset++;
this->buffer_send[4] = offset-5;
this->length_send = offset;
this->exchange();
offset = 0;
unsigned int recv_len = this->length_recv;
if (need_additional_txkeys)
{
ASSERT_X(recv_len>=32, "Not enought data from device");
memmove(additional_txkey.pub.data, &this->buffer_recv[offset], 32);
additional_tx_public_keys.push_back(additional_txkey.pub);
offset += 32;
recv_len -= 32;
}
if (tx_version > 1)
{
ASSERT_X(recv_len>=32, "Not enought data from device");
crypto::secret_key scalar1;
memmove(scalar1.data, &this->buffer_recv[offset],32);
amount_keys.push_back(rct::sk2rct(scalar1));
offset += 32;
recv_len -= 32;
}
ASSERT_X(recv_len>=32, "Not enought data from device");
memmove(out_eph_public_key.data, &this->buffer_recv[offset], 32);
recv_len -= 32;
// add ABPkeys
this->add_output_key_mapping(dst_entr.addr.m_view_public_key, dst_entr.addr.m_spend_public_key, dst_entr.is_subaddress, is_change,
need_additional_txkeys, output_index,
amount_keys.back(), out_eph_public_key);
#ifdef DEBUG_HWDEVICE
hw::ledger::check32("generate_output_ephemeral_keys", "amount_key", (const char*)amount_keys_x.back().bytes, (const char*)hw::ledger::decrypt(amount_keys.back()).bytes);
if (need_additional_txkeys) {
hw::ledger::check32("generate_output_ephemeral_keys", "additional_tx_key", additional_tx_keys_x.back().data, additional_tx_keys.back().data);
}
hw::ledger::check32("generate_output_ephemeral_keys", "out_eph_public_key", out_eph_public_key_x.data, out_eph_public_key.data);
#endif
return true;
}
bool device_ledger::add_output_key_mapping(const crypto::public_key &Aout, const crypto::public_key &Bout, const bool is_subaddress, const bool is_change,
const bool need_additional, const size_t real_output_index,
const rct::key &amount_key, const crypto::public_key &out_eph_public_key) {
key_map.add(ABPkeys(rct::pk2rct(Aout),rct::pk2rct(Bout), is_subaddress, is_change, need_additional, real_output_index, rct::pk2rct(out_eph_public_key), amount_key));
return true;
}
@ -1328,6 +1465,9 @@ namespace hw {
//is_subaddress
this->buffer_send[offset] = outKeys.is_subaddress;
offset++;
//is_change_address
this->buffer_send[offset] = outKeys.is_change_address;
offset++;
//Aout
memmove(this->buffer_send+offset, outKeys.Aout.bytes, 32);
offset+=32;
@ -1348,8 +1488,8 @@ namespace hw {
//k
memmove(this->buffer_send+offset, data+kv_offset,32);
offset += 32;
//v
kv_offset += 32;
//v
memmove(this->buffer_send+offset, data+kv_offset,32);
offset += 32;
kv_offset += 32;

19
src/device/device_ledger.hpp
View file

@ -56,12 +56,14 @@ namespace hw {
rct::key Aout;
rct::key Bout;
bool is_subaddress;
bool is_change_address;
bool additional_key ;
size_t index;
rct::key Pout;
rct::key AKout;
ABPkeys(const rct::key& A, const rct::key& B, const bool is_subaddr, size_t index, const rct::key& P,const rct::key& AK);
ABPkeys(const rct::key& A, const rct::key& B, const bool is_subaddr, bool is_subaddress, bool is_change_address, size_t index, const rct::key& P,const rct::key& AK);
ABPkeys(const ABPkeys& keys) ;
ABPkeys() {index=0;is_subaddress=false;}
ABPkeys() {index=0;is_subaddress=false;is_subaddress=false;is_change_address=false;}
};
class Keymap {
@ -105,7 +107,9 @@ namespace hw {
device_mode mode;
// map public destination key to ephemeral destination key
Keymap key_map;
bool add_output_key_mapping(const crypto::public_key &Aout, const crypto::public_key &Bout, const bool is_subaddress, const bool is_change,
const bool need_additional, const size_t real_output_index,
const rct::key &amount_key, const crypto::public_key &out_eph_public_key);
// To speed up blockchain parsing the view key maybe handle here.
crypto::secret_key viewkey;
bool has_view_key;
@ -194,9 +198,12 @@ namespace hw {
bool ecdhEncode(rct::ecdhTuple & unmasked, const rct::key & sharedSec, bool short_format) override;
bool ecdhDecode(rct::ecdhTuple & masked, const rct::key & sharedSec, bool short_format) override;
bool add_output_key_mapping(const crypto::public_key &Aout, const crypto::public_key &Bout, const bool is_subaddress, const size_t real_output_index,
const rct::key &amount_key, const crypto::public_key &out_eph_public_key) override;
bool generate_output_ephemeral_keys(const size_t tx_version, const cryptonote::account_keys &sender_account_keys, const crypto::public_key &txkey_pub, const crypto::secret_key &tx_key,
const cryptonote::tx_destination_entry &dst_entr, const boost::optional<cryptonote::account_public_address> &change_addr, const size_t output_index,
const bool &need_additional_txkeys, const std::vector<crypto::secret_key> &additional_tx_keys,
std::vector<crypto::public_key> &additional_tx_public_keys,
std::vector<rct::key> &amount_keys,
crypto::public_key &out_eph_public_key) override;
bool mlsag_prehash(const std::string &blob, size_t inputs_size, size_t outputs_size, const rct::keyV &hashes, const rct::ctkeyV &outPk, rct::key &prehash) override;
bool mlsag_prepare(const rct::key &H, const rct::key &xx, rct::key &a, rct::key &aG, rct::key &aHP, rct::key &rvII) override;