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trezor.crypto: curve.nist256p1 and curve.secp256k1 now sign/verify 256-bit digests, not arbitrary length messages

Browse Source
pull/25/head
Pavol Rusnak 8 years ago
parent 1bb20c2521
commit 8d1109986c
No known key found for this signature in database
GPG Key ID: 91F3B339B9A02A3D
10 changed files with 90 additions and 46 deletions
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30
extmod/modtrezorcrypto/modtrezorcrypto-nist256p1.h
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@ -62,24 +62,24 @@ STATIC mp_obj_t mod_TrezorCrypto_Nist256p1_publickey(size_t n_args, const mp_obj
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mod_TrezorCrypto_Nist256p1_publickey_obj, 2, 3, mod_TrezorCrypto_Nist256p1_publickey);
/// def trezor.crypto.curve.nist256p1.sign(secret_key: bytes, message: bytes) -> bytes:
/// def trezor.crypto.curve.nist256p1.sign(secret_key: bytes, digest: bytes) -> bytes:
/// '''
/// Uses secret key to produce the signature of message.
/// Uses secret key to produce the signature of the digest.
/// '''
STATIC mp_obj_t mod_TrezorCrypto_Nist256p1_sign(mp_obj_t self, mp_obj_t secret_key, mp_obj_t message) {
mp_buffer_info_t sk, msg;
STATIC mp_obj_t mod_TrezorCrypto_Nist256p1_sign(mp_obj_t self, mp_obj_t secret_key, mp_obj_t digest) {
mp_buffer_info_t sk, dig;
mp_get_buffer_raise(secret_key, &sk, MP_BUFFER_READ);
mp_get_buffer_raise(message, &msg, MP_BUFFER_READ);
mp_get_buffer_raise(digest, &dig, MP_BUFFER_READ);
if (sk.len != 32) {
mp_raise_ValueError("Invalid length of secret key");
}
if (msg.len == 0) {
mp_raise_ValueError("Empty data to sign");
if (dig.len != 32) {
mp_raise_ValueError("Invalid length of digest");
}
vstr_t vstr;
vstr_init_len(&vstr, 65);
uint8_t pby;
if (0 != ecdsa_sign(&nist256p1, (const uint8_t *)sk.buf, (const uint8_t *)msg.buf, msg.len, (uint8_t *)vstr.buf, &pby, NULL)) { // TODO: is_canonical
if (0 != ecdsa_sign_digest(&nist256p1, (const uint8_t *)sk.buf, (const uint8_t *)dig.buf, (uint8_t *)vstr.buf, &pby, NULL)) { // TODO: is_canonical
mp_raise_ValueError("Signing failed");
}
(void)pby;
@ -87,26 +87,26 @@ STATIC mp_obj_t mod_TrezorCrypto_Nist256p1_sign(mp_obj_t self, mp_obj_t secret_k
}
STATIC MP_DEFINE_CONST_FUN_OBJ_3(mod_TrezorCrypto_Nist256p1_sign_obj, mod_TrezorCrypto_Nist256p1_sign);
/// def trezor.crypto.curve.nist256p1.verify(public_key: bytes, signature: bytes, message: bytes) -> bool:
/// def trezor.crypto.curve.nist256p1.verify(public_key: bytes, signature: bytes, digest: bytes) -> bool:
/// '''
/// Uses public key to verify the signature of the message
/// Uses public key to verify the signature of the digest.
/// Returns True on success.
/// '''
STATIC mp_obj_t mod_TrezorCrypto_Nist256p1_verify(size_t n_args, const mp_obj_t *args) {
mp_buffer_info_t pk, sig, msg;
mp_buffer_info_t pk, sig, dig;
mp_get_buffer_raise(args[1], &pk, MP_BUFFER_READ);
mp_get_buffer_raise(args[2], &sig, MP_BUFFER_READ);
mp_get_buffer_raise(args[3], &msg, MP_BUFFER_READ);
mp_get_buffer_raise(args[3], &dig, MP_BUFFER_READ);
if (pk.len != 33 && pk.len != 65) {
mp_raise_ValueError("Invalid length of public key");
}
if (sig.len != 65) {
mp_raise_ValueError("Invalid length of signature");
}
if (msg.len == 0) {
mp_raise_ValueError("Empty data to verify");
if (dig.len != 32) {
mp_raise_ValueError("Invalid length of digest");
}
return mp_obj_new_bool(0 == ecdsa_verify(&nist256p1, (const uint8_t *)pk.buf, (const uint8_t *)sig.buf, (const uint8_t *)msg.buf, msg.len));
return mp_obj_new_bool(0 == ecdsa_verify_digest(&nist256p1, (const uint8_t *)pk.buf, (const uint8_t *)sig.buf, (const uint8_t *)dig.buf));
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mod_TrezorCrypto_Nist256p1_verify_obj, 4, 4, mod_TrezorCrypto_Nist256p1_verify);

30
extmod/modtrezorcrypto/modtrezorcrypto-secp256k1.h
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@ -62,24 +62,24 @@ 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, 2, 3, mod_TrezorCrypto_Secp256k1_publickey);
/// def trezor.crypto.curve.secp256k1.sign(secret_key: bytes, message: bytes) -> bytes:
/// def trezor.crypto.curve.secp256k1.sign(secret_key: bytes, digest: bytes) -> bytes:
/// '''
/// Uses secret key to produce the signature of message.
/// Uses secret key to produce the signature of the digest.
/// '''
STATIC mp_obj_t mod_TrezorCrypto_Secp256k1_sign(mp_obj_t self, mp_obj_t secret_key, mp_obj_t message) {
mp_buffer_info_t sk, msg;
STATIC mp_obj_t mod_TrezorCrypto_Secp256k1_sign(mp_obj_t self, mp_obj_t secret_key, mp_obj_t digest) {
mp_buffer_info_t sk, dig;
mp_get_buffer_raise(secret_key, &sk, MP_BUFFER_READ);
mp_get_buffer_raise(message, &msg, MP_BUFFER_READ);
mp_get_buffer_raise(digest, &dig, MP_BUFFER_READ);
if (sk.len != 32) {
mp_raise_ValueError("Invalid length of secret key");
}
if (msg.len == 0) {
mp_raise_ValueError("Empty data to sign");
if (dig.len != 32) {
mp_raise_ValueError("Invalid length of digest");
}
vstr_t vstr;
vstr_init_len(&vstr, 65);
uint8_t pby;
if (0 != ecdsa_sign(&secp256k1, (const uint8_t *)sk.buf, (const uint8_t *)msg.buf, msg.len, (uint8_t *)vstr.buf, &pby, NULL)) { // TODO: is_canonical
if (0 != ecdsa_sign_digest(&secp256k1, (const uint8_t *)sk.buf, (const uint8_t *)dig.buf, (uint8_t *)vstr.buf, &pby, NULL)) { // TODO: is_canonical
mp_raise_ValueError("Signing failed");
}
(void)pby;
@ -87,26 +87,26 @@ STATIC mp_obj_t mod_TrezorCrypto_Secp256k1_sign(mp_obj_t self, mp_obj_t secret_k
}
STATIC MP_DEFINE_CONST_FUN_OBJ_3(mod_TrezorCrypto_Secp256k1_sign_obj, mod_TrezorCrypto_Secp256k1_sign);
/// def trezor.crypto.curve.secp256k1.verify(public_key: bytes, signature: bytes, message: bytes) -> bool:
/// def trezor.crypto.curve.secp256k1.verify(public_key: bytes, signature: bytes, digest: bytes) -> bool:
/// '''
/// Uses public key to verify the signature of the message
/// Uses public key to verify the signature of the digest.
/// Returns True on success.
/// '''
STATIC mp_obj_t mod_TrezorCrypto_Secp256k1_verify(size_t n_args, const mp_obj_t *args) {
mp_buffer_info_t pk, sig, msg;
mp_buffer_info_t pk, sig, dig;
mp_get_buffer_raise(args[1], &pk, MP_BUFFER_READ);
mp_get_buffer_raise(args[2], &sig, MP_BUFFER_READ);
mp_get_buffer_raise(args[3], &msg, MP_BUFFER_READ);
mp_get_buffer_raise(args[3], &dig, MP_BUFFER_READ);
if (pk.len != 33 && pk.len != 65) {
mp_raise_ValueError("Invalid length of public key");
}
if (sig.len != 65) {
mp_raise_ValueError("Invalid length of signature");
}
if (msg.len == 0) {
mp_raise_ValueError("Empty data to verify");
if (dig.len != 32) {
mp_raise_ValueError("Invalid length of digest");
}
return mp_obj_new_bool(0 == ecdsa_verify(&secp256k1, (const uint8_t *)pk.buf, (const uint8_t *)sig.buf, (const uint8_t *)msg.buf, msg.len));
return mp_obj_new_bool(0 == ecdsa_verify_digest(&secp256k1, (const uint8_t *)pk.buf, (const uint8_t *)sig.buf, (const uint8_t *)dig.buf));
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mod_TrezorCrypto_Secp256k1_verify_obj, 4, 4, mod_TrezorCrypto_Secp256k1_verify);

6
mocks/trezor/config.py
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@ -11,3 +11,9 @@ def set(app: int, key: int, value: bytes) -> None:
Sets a value of given key for given app.
Returns True on success.
'''
# ../extmod/modtrezorconfig/modtrezorconfig.c
def wipe() -> None:
'''
Erases the whole config (use with caution!)
'''

0
mocks/trezor/crypto/.mock-generated
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6
mocks/trezor/crypto/HDNode.py
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@ -23,6 +23,12 @@ def serialize_private() -> str:
Serialize the private info HD node to base58 string.
'''
# ../extmod/modtrezorcrypto/modtrezorcrypto-bip32.h
def clone() -> HDNode:
'''
Returns a copy of the HD node.
'''
# ../extmod/modtrezorcrypto/modtrezorcrypto-bip32.h
def depth() -> int:
'''

0
mocks/trezor/crypto/__init__.py
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8
mocks/trezor/crypto/curve/nist256p1.py
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@ -12,15 +12,15 @@ def publickey(secret_key: bytes, compressed: bool=True) -> bytes:
'''
# ../extmod/modtrezorcrypto/modtrezorcrypto-nist256p1.h
def sign(secret_key: bytes, message: bytes) -> bytes:
def sign(secret_key: bytes, digest: bytes) -> bytes:
'''
Uses secret key to produce the signature of message.
Uses secret key to produce the signature of the digest.
'''
# ../extmod/modtrezorcrypto/modtrezorcrypto-nist256p1.h
def verify(public_key: bytes, signature: bytes, message: bytes) -> bool:
def verify(public_key: bytes, signature: bytes, digest: bytes) -> bool:
'''
Uses public key to verify the signature of the message
Uses public key to verify the signature of the digest.
Returns True on success.
'''

8
mocks/trezor/crypto/curve/secp256k1.py
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@ -12,15 +12,15 @@ def publickey(secret_key: bytes, compressed: bool=True) -> bytes:
'''
# ../extmod/modtrezorcrypto/modtrezorcrypto-secp256k1.h
def sign(secret_key: bytes, message: bytes) -> bytes:
def sign(secret_key: bytes, digest: bytes) -> bytes:
'''
Uses secret key to produce the signature of message.
Uses secret key to produce the signature of the digest.
'''
# ../extmod/modtrezorcrypto/modtrezorcrypto-secp256k1.h
def verify(public_key: bytes, signature: bytes, message: bytes) -> bool:
def verify(public_key: bytes, signature: bytes, digest: bytes) -> bool:
'''
Uses public key to verify the signature of the message
Uses public key to verify the signature of the digest.
Returns True on success.
'''

24
tests/test_trezor.crypto.curve.nist256p1.py
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@ -83,13 +83,29 @@ class TestCryptoNist256p1(unittest.TestCase):
else:
self.assertEqual(pk33, '03' + pk[:64])
def test_sign_verify_min_max(self):
sk = nist256p1.generate_secret()
pk = nist256p1.publickey(sk)
dig = bytes([1] + [0]*31)
sig = nist256p1.sign(sk, dig)
self.assertTrue(nist256p1.verify(pk, sig, dig))
dig = bytes([0]*31 + [1])
sig = nist256p1.sign(sk, dig)
self.assertTrue(nist256p1.verify(pk, sig, dig))
dig = bytes([0xFF]*32)
sig = nist256p1.sign(sk, dig)
self.assertTrue(nist256p1.verify(pk, sig, dig))
def test_sign_verify_random(self):
for l in range(1, 300):
for _ in range(100):
sk = nist256p1.generate_secret()
pk = nist256p1.publickey(sk)
msg = random.bytes(l)
sig = nist256p1.sign(sk, msg)
self.assertTrue(nist256p1.verify(pk, sig, msg))
dig = random.bytes(32)
sig = nist256p1.sign(sk, dig)
self.assertTrue(nist256p1.verify(pk, sig, dig))
if __name__ == '__main__':
unittest.main()

24
tests/test_trezor.crypto.curve.secp256k1.py
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@ -76,13 +76,29 @@ class TestCryptoSecp256k1(unittest.TestCase):
else:
self.assertEqual(pk33, '03' + pk[:64])
def test_sign_verify_min_max(self):
sk = secp256k1.generate_secret()
pk = secp256k1.publickey(sk)
dig = bytes([1] + [0]*31)
sig = secp256k1.sign(sk, dig)
self.assertTrue(secp256k1.verify(pk, sig, dig))
dig = bytes([0]*31 + [1])
sig = secp256k1.sign(sk, dig)
self.assertTrue(secp256k1.verify(pk, sig, dig))
dig = bytes([0xFF]*32)
sig = secp256k1.sign(sk, dig)
self.assertTrue(secp256k1.verify(pk, sig, dig))
def test_sign_verify_random(self):
for l in range(1, 300):
for _ in range(100):
sk = secp256k1.generate_secret()
pk = secp256k1.publickey(sk)
msg = random.bytes(l)
sig = secp256k1.sign(sk, msg)
self.assertTrue(secp256k1.verify(pk, sig, msg))
dig = random.bytes(32)
sig = secp256k1.sign(sk, dig)
self.assertTrue(secp256k1.verify(pk, sig, dig))
if __name__ == '__main__':
unittest.main()

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