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Add timelock verification on device

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This commit is contained in:
cslashm 2020-04-03 22:56:55 +02:00
parent 6c7d928f19
commit 688a3e87e7
8 changed files with 104 additions and 2 deletions
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78
src/device/device_ledger.cpp
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@ -191,7 +191,7 @@ namespace hw {
static int device_id = 0;
#define PROTOCOL_VERSION 2
#define PROTOCOL_VERSION 3
#define INS_NONE 0x00
#define INS_RESET 0x02
@ -228,6 +228,7 @@ namespace hw {
#define INS_BLIND 0x78
#define INS_UNBLIND 0x7A
#define INS_GEN_TXOUT_KEYS 0x7B
#define INS_PREFIX_HASH 0x7D
#define INS_VALIDATE 0x7C
#define INS_MLSAG 0x7E
#define INS_CLOSE_TX 0x80
@ -1346,6 +1347,81 @@ namespace hw {
return true;
}
void device_ledger::get_transaction_prefix_hash(const cryptonote::transaction_prefix& tx, crypto::hash& h) {
AUTO_LOCK_CMD();
int pref_length = 0, pref_offset = 0, offset = 0;
#ifdef DEBUG_HWDEVICE
crypto::hash h_x;
this->controle_device->get_transaction_prefix_hash(tx,h_x);
MDEBUG("get_transaction_prefix_hash [[IN]] h_x/1 "<<h_x);
#endif
std::ostringstream s_x;
binary_archive<true> a_x(s_x);
CHECK_AND_ASSERT_THROW_MES(::serialization::serialize(a_x, const_cast<cryptonote::transaction_prefix&>(tx)),
"unable to serialize transaction prefix");
pref_length = s_x.str().size();
//auto pref = std::make_unique<unsigned char[]>(pref_length);
auto uprt_pref = std::unique_ptr<unsigned char[]>{ new unsigned char[pref_length] };
unsigned char* pref = uprt_pref.get();
memmove(pref, s_x.str().data(), pref_length);
offset = set_command_header_noopt(INS_PREFIX_HASH,1);
pref_offset = 0;
unsigned char v;
//version as varint
do {
v = pref[pref_offset];
this->buffer_send[offset] = v;
offset += 1;
pref_offset += 1;
} while (v&0x80);
//locktime as var int
do {
v = pref[pref_offset];
this->buffer_send[offset] = v;
offset += 1;
pref_offset += 1;
} while (v&0x80);
this->buffer_send[4] = offset-5;
this->length_send = offset;
this->exchange_wait_on_input();
//hash remains
int cnt = 0;
while (pref_offset < pref_length) {
int len;
cnt++;
offset = set_command_header(INS_PREFIX_HASH,2,cnt);
len = pref_length - pref_offset;
//options
if (len > (BUFFER_SEND_SIZE-7)) {
len = BUFFER_SEND_SIZE-7;
this->buffer_send[offset] = 0x80;
} else {
this->buffer_send[offset] = 0x00;
}
offset += 1;
//send chunk
memmove(&this->buffer_send[offset], pref+pref_offset, len);
offset += len;
pref_offset += len;
this->buffer_send[4] = offset-5;
this->length_send = offset;
this->exchange();
}
memmove(h.data, &this->buffer_recv[0], 32);
#ifdef DEBUG_HWDEVICE
hw::ledger::check8("prefix_hash", "h", h_x.data, h.data);
#endif
}
bool device_ledger::encrypt_payment_id(crypto::hash8 &payment_id, const crypto::public_key &public_key, const crypto::secret_key &secret_key) {
AUTO_LOCK_CMD();