diff options
Diffstat (limited to 'rsa.c')
| -rw-r--r-- | rsa.c | 32 |
1 files changed, 9 insertions, 23 deletions
@@ -201,7 +201,7 @@ static hal_error_t create_blinding_factors(struct rsa_key *key, fp_int *bf, fp_i { assert(key != NULL && bf != NULL && ubf != NULL); - uint8_t rnd[(fp_unsigned_bin_size(&key->n) + 7) & ~7]; + uint8_t rnd[fp_unsigned_bin_size(&key->n)]; hal_error_t err = HAL_OK; if ((err = hal_get_random(rnd, sizeof(rnd))) != HAL_OK) @@ -443,7 +443,7 @@ static hal_error_t find_prime(unsigned prime_length, fp_int *e, fp_int *result) hal_error_t hal_rsa_key_gen(hal_rsa_key_t *key_, void *keybuf, const size_t keybuf_len, const unsigned key_length, - const unsigned long public_exponent) + const uint8_t * const public_exponent, const size_t public_exponent_len) { struct rsa_key *key = keybuf; hal_error_t err = HAL_OK; @@ -452,30 +452,16 @@ hal_error_t hal_rsa_key_gen(hal_rsa_key_t *key_, if (key_ == NULL || keybuf == NULL || keybuf_len < sizeof(struct rsa_key)) return HAL_ERROR_BAD_ARGUMENTS; - switch (key_length) { - case bitsToBytes(1024): - case bitsToBytes(2048): - case bitsToBytes(4096): - case bitsToBytes(8192): - break; - default: - return HAL_ERROR_UNSUPPORTED_KEY; - } + memset(keybuf, 0, keybuf_len); + key->type = HAL_RSA_PRIVATE; + fp_read_unsigned_bin(&key->e, (uint8_t *) public_exponent, public_exponent_len); - switch (public_exponent) { - case 0x010001: - break; - default: + if (key_length != bitsToBytes(1024) && key_length != bitsToBytes(2048) && + key_length != bitsToBytes(4096) && key_length != bitsToBytes(8192)) return HAL_ERROR_UNSUPPORTED_KEY; - } - /* - * Initialize key - */ - - memset(keybuf, 0, keybuf_len); - key->type = HAL_RSA_PRIVATE; - fp_set(&key->e, public_exponent); + if (fp_cmp_d(&key->e, 0x010001) != FP_EQ) + return HAL_ERROR_UNSUPPORTED_KEY; /* * Find a good pair of prime numbers. |