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embed/extmod/modtrezorcrypto: add support to variable outlen for Blake2{b,s}

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pull/25/head
Pavol Rusnak 6 years ago
parent a1204d8d7d
commit 90975f6b6e
No known key found for this signature in database
GPG Key ID: 91F3B339B9A02A3D
4 changed files with 36 additions and 20 deletions
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24
embed/extmod/modtrezorcrypto/modtrezorcrypto-blake2b.h
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@ -33,21 +33,29 @@ typedef struct _mp_obj_Blake2b_t {
STATIC mp_obj_t mod_trezorcrypto_Blake2b_update(mp_obj_t self, mp_obj_t data);
/// def __init__(self, data: bytes = None, key: bytes = None) -> None:
/// def __init__(self, data: bytes = None, outlen: int = Blake2b.digest_size, key: bytes = None) -> None:
/// '''
/// Creates a hash context object.
/// '''
STATIC mp_obj_t mod_trezorcrypto_Blake2b_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args) {
mp_arg_check_num(n_args, n_kw, 0, 2, false);
mp_arg_check_num(n_args, n_kw, 0, 3, false);
mp_obj_Blake2b_t *o = m_new_obj(mp_obj_Blake2b_t);
o->base.type = type;
int res = 0;
// constructor called with key argument set
if (n_args == 2) {
if (n_args == 3) {
size_t outlen = mp_obj_get_int(args[1]);
mp_buffer_info_t key;
mp_get_buffer_raise(args[1], &key, MP_BUFFER_READ);
blake2b_InitKey(&(o->ctx), BLAKE2B_DIGEST_LENGTH, key.buf, key.len);
mp_get_buffer_raise(args[2], &key, MP_BUFFER_READ);
res = blake2b_InitKey(&(o->ctx), outlen, key.buf, key.len);
} else if (n_args == 2) {
size_t outlen = mp_obj_get_int(args[1]);
res = blake2b_Init(&(o->ctx), outlen);
} else {
blake2b_Init(&(o->ctx), BLAKE2B_DIGEST_LENGTH);
res = blake2b_Init(&(o->ctx), BLAKE2B_DIGEST_LENGTH);
}
if (res < 0) {
mp_raise_ValueError("Invalid Blake2b parameters");
}
// constructor called with data argument set
if (n_args >= 1) {
@ -80,9 +88,9 @@ STATIC mp_obj_t mod_trezorcrypto_Blake2b_digest(mp_obj_t self) {
uint8_t out[BLAKE2B_DIGEST_LENGTH];
BLAKE2B_CTX ctx;
memcpy(&ctx, &(o->ctx), sizeof(BLAKE2B_CTX));
blake2b_Final(&ctx, out, BLAKE2B_DIGEST_LENGTH);
blake2b_Final(&ctx, out, ctx.outlen);
memset(&ctx, 0, sizeof(BLAKE2B_CTX));
return mp_obj_new_bytes(out, sizeof(out));
return mp_obj_new_bytes(out, o->ctx.outlen);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(mod_trezorcrypto_Blake2b_digest_obj, mod_trezorcrypto_Blake2b_digest);

24
embed/extmod/modtrezorcrypto/modtrezorcrypto-blake2s.h
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@ -33,21 +33,29 @@ typedef struct _mp_obj_Blake2s_t {
STATIC mp_obj_t mod_trezorcrypto_Blake2s_update(mp_obj_t self, mp_obj_t data);
/// def __init__(self, data: bytes = None, key: bytes = None) -> None:
/// def __init__(self, data: bytes = None, outlen: int = Blake2s.digest_size, key: bytes = None) -> None:
/// '''
/// Creates a hash context object.
/// '''
STATIC mp_obj_t mod_trezorcrypto_Blake2s_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args) {
mp_arg_check_num(n_args, n_kw, 0, 2, false);
mp_arg_check_num(n_args, n_kw, 0, 3, false);
mp_obj_Blake2s_t *o = m_new_obj(mp_obj_Blake2s_t);
o->base.type = type;
int res = 0;
// constructor called with key argument set
if (n_args == 2) {
if (n_args == 3) {
size_t outlen = mp_obj_get_int(args[1]);
mp_buffer_info_t key;
mp_get_buffer_raise(args[1], &key, MP_BUFFER_READ);
blake2s_InitKey(&(o->ctx), BLAKE2S_DIGEST_LENGTH, key.buf, key.len);
mp_get_buffer_raise(args[2], &key, MP_BUFFER_READ);
res = blake2s_InitKey(&(o->ctx), outlen, key.buf, key.len);
} else if (n_args == 2) {
size_t outlen = mp_obj_get_int(args[1]);
res = blake2s_Init(&(o->ctx), outlen);
} else {
blake2s_Init(&(o->ctx), BLAKE2S_DIGEST_LENGTH);
res = blake2s_Init(&(o->ctx), BLAKE2S_DIGEST_LENGTH);
}
if (res < 0) {
mp_raise_ValueError("Invalid Blake2s parameters");
}
// constructor called with data argument set
if (n_args >= 1) {
@ -80,9 +88,9 @@ STATIC mp_obj_t mod_trezorcrypto_Blake2s_digest(mp_obj_t self) {
uint8_t out[BLAKE2S_DIGEST_LENGTH];
BLAKE2S_CTX ctx;
memcpy(&ctx, &(o->ctx), sizeof(BLAKE2S_CTX));
blake2s_Final(&ctx, out, BLAKE2S_DIGEST_LENGTH);
blake2s_Final(&ctx, out, ctx.outlen);
memset(&ctx, 0, sizeof(BLAKE2S_CTX));
return mp_obj_new_bytes(out, sizeof(out));
return mp_obj_new_bytes(out, o->ctx.outlen);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(mod_trezorcrypto_Blake2s_digest_obj, mod_trezorcrypto_Blake2s_digest);

4
tests/test_trezor.crypto.hashlib.blake2b.py
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@ -18,11 +18,11 @@ class TestCryptoBlake2b(unittest.TestCase):
def test_digest(self):
key = unhexlify('000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f202122232425262728292a2b2c2d2e2f303132333435363738393a3b3c3d3e3f')
for d, h in self.vectors:
self.assertEqual(hashlib.blake2b(unhexlify(d), key).digest(), unhexlify(h))
self.assertEqual(hashlib.blake2b(unhexlify(d), hashlib.blake2b.digest_size, key).digest(), unhexlify(h))
def test_update(self):
key = unhexlify('000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f202122232425262728292a2b2c2d2e2f303132333435363738393a3b3c3d3e3f')
x = hashlib.blake2b(b'', key)
x = hashlib.blake2b(b'', hashlib.blake2b.digest_size, key)
x.update(bytes(range(10)))
self.assertEqual(x.digest(), unhexlify('4fe181f54ad63a2983feaaf77d1e7235c2beb17fa328b6d9505bda327df19fc37f02c4b6f0368ce23147313a8e5738b5fa2a95b29de1c7f8264eb77b69f585cd'))
x.update(bytes(range(10, 30)))

4
tests/test_trezor.crypto.hashlib.blake2s.py
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@ -19,11 +19,11 @@ class TestCryptoBlake2s(unittest.TestCase):
def test_digest(self):
key = unhexlify('000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f')
for d, h in self.vectors:
self.assertEqual(hashlib.blake2s(unhexlify(d), key).digest(), unhexlify(h))
self.assertEqual(hashlib.blake2s(unhexlify(d), hashlib.blake2s.digest_size, key).digest(), unhexlify(h))
def test_update(self):
key = unhexlify('000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f')
x = hashlib.blake2s(b'', key)
x = hashlib.blake2s(b'', hashlib.blake2s.digest_size, key)
x.update(bytes(range(10)))
self.assertEqual(x.digest(), unhexlify('f5c4b2ba1a00781b13aba0425242c69cb1552f3f71a9a3bb22b4a6b4277b46dd'))
x.update(bytes(range(10, 30)))

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