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Remove curve parameter from public functions

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This commit is contained in:
Manuel Pégourié-Gonnard 2019-11-21 12:00:43 +01:00
parent be5f833c9c
commit 1a5337179f
14 changed files with 55 additions and 110 deletions
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24
tinycrypt/ecc_dsa.c
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@ -76,7 +76,7 @@ static uECC_RNG_Function g_rng_function = 0;
#endif
static void bits2int(uECC_word_t *native, const uint8_t *bits,
unsigned bits_size, uECC_Curve curve)
unsigned bits_size)
{
unsigned num_n_bytes = BITS_TO_BYTES(NUM_ECC_BITS);
unsigned num_n_words = BITS_TO_WORDS(NUM_ECC_BITS);
@ -84,8 +84,6 @@ static void bits2int(uECC_word_t *native, const uint8_t *bits,
uECC_word_t carry;
uECC_word_t *ptr;
(void) curve;
if (bits_size > num_n_bytes) {
bits_size = num_n_bytes;
}
@ -111,8 +109,7 @@ static void bits2int(uECC_word_t *native, const uint8_t *bits,
}
int uECC_sign_with_k(const uint8_t *private_key, const uint8_t *message_hash,
unsigned hash_size, uECC_word_t *k, uint8_t *signature,
uECC_Curve curve)
unsigned hash_size, uECC_word_t *k, uint8_t *signature)
{
uECC_word_t tmp[NUM_ECC_WORDS];
@ -128,7 +125,7 @@ int uECC_sign_with_k(const uint8_t *private_key, const uint8_t *message_hash,
return 0;
}
r = EccPoint_mult_safer(p, curve_G, k, curve);
r = EccPoint_mult_safer(p, curve_G, k);
if (r == 0 || uECC_vli_isZero(p)) {
return 0;
}
@ -158,7 +155,7 @@ int uECC_sign_with_k(const uint8_t *private_key, const uint8_t *message_hash,
uECC_vli_set(s, p);
uECC_vli_modMult(s, tmp, s, curve_n); /* s = r*d */
bits2int(tmp, message_hash, hash_size, curve);
bits2int(tmp, message_hash, hash_size);
uECC_vli_modAdd(s, tmp, s, curve_n); /* s = e + r*d */
uECC_vli_modMult(s, s, k, curve_n); /* s = (e + r*d) / k */
if (uECC_vli_numBits(s) > (bitcount_t)NUM_ECC_BYTES * 8) {
@ -170,7 +167,7 @@ int uECC_sign_with_k(const uint8_t *private_key, const uint8_t *message_hash,
}
int uECC_sign(const uint8_t *private_key, const uint8_t *message_hash,
unsigned hash_size, uint8_t *signature, uECC_Curve curve)
unsigned hash_size, uint8_t *signature)
{
uECC_word_t _random[2*NUM_ECC_WORDS];
uECC_word_t k[NUM_ECC_WORDS];
@ -187,8 +184,7 @@ int uECC_sign(const uint8_t *private_key, const uint8_t *message_hash,
// computing k as modular reduction of _random (see FIPS 186.4 B.5.1):
uECC_vli_mmod(k, _random, curve_n);
if (uECC_sign_with_k(private_key, message_hash, hash_size, k, signature,
curve)) {
if (uECC_sign_with_k(private_key, message_hash, hash_size, k, signature)) {
return 1;
}
}
@ -201,8 +197,7 @@ static bitcount_t smax(bitcount_t a, bitcount_t b)
}
int uECC_verify(const uint8_t *public_key, const uint8_t *message_hash,
unsigned hash_size, const uint8_t *signature,
uECC_Curve curve)
unsigned hash_size, const uint8_t *signature)
{
uECC_word_t u1[NUM_ECC_WORDS], u2[NUM_ECC_WORDS];
@ -224,9 +219,6 @@ int uECC_verify(const uint8_t *public_key, const uint8_t *message_hash,
wordcount_t num_words = NUM_ECC_WORDS;
wordcount_t num_n_words = BITS_TO_WORDS(NUM_ECC_BITS);
if (curve != uECC_secp256r1())
return 0;
rx[num_n_words - 1] = 0;
r[num_n_words - 1] = 0;
s[num_n_words - 1] = 0;
@ -251,7 +243,7 @@ int uECC_verify(const uint8_t *public_key, const uint8_t *message_hash,
/* Calculate u1 and u2. */
uECC_vli_modInv(z, s, curve_n); /* z = 1/s */
u1[num_n_words - 1] = 0;
bits2int(u1, message_hash, hash_size, curve);
bits2int(u1, message_hash, hash_size);
uECC_vli_modMult(u1, u1, z, curve_n); /* u1 = e/s */
uECC_vli_modMult(u2, r, z, curve_n); /* u2 = r/s */