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Code Issues Releases Wiki Activity

embed/extmod/modtrezorcrypto: introduce CANONICAL_SIG_ETHEREUM constant

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This commit is contained in:
Pavol Rusnak 2018-10-21 19:16:15 +02:00
parent 443539aedd
commit 03c681ec49
No known key found for this signature in database
GPG Key ID: 91F3B339B9A02A3D
3 changed files with 15 additions and 8 deletions
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19
embed/extmod/modtrezorcrypto/modtrezorcrypto-secp256k1.h
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@ -62,13 +62,17 @@ STATIC mp_obj_t mod_trezorcrypto_secp256k1_publickey(size_t n_args, const mp_obj
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mod_trezorcrypto_secp256k1_publickey_obj, 1, 2, mod_trezorcrypto_secp256k1_publickey);
static int ethereum_is_canonic(uint8_t v, uint8_t signature[64])
static int ethereum_is_canonical(uint8_t v, uint8_t signature[64])
{
(void) signature;
(void)signature;
return (v & 2) == 0;
}
/// def sign(secret_key: bytes, digest: bytes, compressed: bool = True, ethereum_canonical: bool = False) -> bytes:
enum {
CANONICAL_SIG_ETHEREUM = 1,
};
/// def sign(secret_key: bytes, digest: bytes, compressed: bool = True, canonical: int = None) -> bytes:
/// '''
/// Uses secret key to produce the signature of the digest.
/// '''
@ -77,10 +81,12 @@ STATIC mp_obj_t mod_trezorcrypto_secp256k1_sign(size_t n_args, const mp_obj_t *a
mp_get_buffer_raise(args[0], &sk, MP_BUFFER_READ);
mp_get_buffer_raise(args[1], &dig, MP_BUFFER_READ);
bool compressed = (n_args < 3) || (args[2] == mp_const_true);
bool ethereum_canonical = (n_args > 3) && (args[3] == mp_const_true);
mp_int_t canonical = (n_args > 3) ? mp_obj_get_int(args[3]) : 0;
int (*is_canonical)(uint8_t by, uint8_t sig[64]) = NULL;
if (ethereum_canonical) {
is_canonical = ethereum_is_canonic;
switch (canonical) {
case CANONICAL_SIG_ETHEREUM:
is_canonical = ethereum_is_canonical;
break;
}
if (sk.len != 32) {
mp_raise_ValueError("Invalid length of secret key");
@ -186,6 +192,7 @@ STATIC const mp_rom_map_elem_t mod_trezorcrypto_secp256k1_globals_table[] = {
{ MP_ROM_QSTR(MP_QSTR_verify), MP_ROM_PTR(&mod_trezorcrypto_secp256k1_verify_obj) },
{ MP_ROM_QSTR(MP_QSTR_verify_recover), MP_ROM_PTR(&mod_trezorcrypto_secp256k1_verify_recover_obj) },
{ MP_ROM_QSTR(MP_QSTR_multiply), MP_ROM_PTR(&mod_trezorcrypto_secp256k1_multiply_obj) },
{ MP_ROM_QSTR(MP_QSTR_CANONICAL_SIG_ETHEREUM), MP_OBJ_NEW_SMALL_INT(CANONICAL_SIG_ETHEREUM) },
};
STATIC MP_DEFINE_CONST_DICT(mod_trezorcrypto_secp256k1_globals, mod_trezorcrypto_secp256k1_globals_table);

2
src/apps/ethereum/sign_message.py
View File

@ -24,7 +24,7 @@ async def sign_message(ctx, msg):
address_n = msg.address_n or ()
node = await seed.derive_node(ctx, address_n)
signature = secp256k1.sign(node.private_key(), message_digest(msg.message), False)
signature = secp256k1.sign(node.private_key(), message_digest(msg.message), False, secp256k1.CANONICAL_SIG_ETHEREUM)
sig = EthereumMessageSignature()
sig.address = node.ethereum_pubkeyhash()

2
src/apps/ethereum/sign_tx.py
View File

@ -131,7 +131,7 @@ async def send_signature(ctx, msg: EthereumSignTx, digest):
address_n = msg.address_n or ()
node = await seed.derive_node(ctx, address_n)
signature = secp256k1.sign(node.private_key(), digest, False, True)
signature = secp256k1.sign(node.private_key(), digest, False, secp256k1.CANONICAL_SIG_ETHEREUM)
req = EthereumTxRequest()
req.signature_v = signature[0]