diff options
Diffstat (limited to 'src/libstrongswan/plugins/bliss/bliss_public_key.c')
| -rw-r--r-- | src/libstrongswan/plugins/bliss/bliss_public_key.c | 19 |
1 files changed, 6 insertions, 13 deletions
diff --git a/src/libstrongswan/plugins/bliss/bliss_public_key.c b/src/libstrongswan/plugins/bliss/bliss_public_key.c index 0175b0f8e..2b305f6c2 100644 --- a/src/libstrongswan/plugins/bliss/bliss_public_key.c +++ b/src/libstrongswan/plugins/bliss/bliss_public_key.c @@ -70,11 +70,12 @@ static bool verify_bliss(private_bliss_public_key_t *this, hash_algorithm_t alg, uint8_t data_hash_buf[HASH_SIZE_SHA512]; chunk_t data_hash; hasher_t *hasher; + hash_algorithm_t oracle_alg; bliss_fft_t *fft; bliss_signature_t *sig; bool success = FALSE; - /* Create data hash */ + /* Create data hash using configurable hash algorithm */ hasher = lib->crypto->create_hasher(lib->crypto, alg); if (!hasher ) { @@ -89,28 +90,22 @@ static bool verify_bliss(private_bliss_public_key_t *this, hash_algorithm_t alg, } hasher->destroy(hasher); - /* Create SHA512 hasher for c_indices oracle */ - hasher = lib->crypto->create_hasher(lib->crypto, HASH_SHA512); - if (!hasher) - { - return FALSE; - } - sig = bliss_signature_create_from_data(this->set, signature); if (!sig) { - hasher->destroy(hasher); return FALSE; } sig->get_parameters(sig, &z1, &z2d, &c_indices); if (!bliss_utils_check_norms(this->set, z1, z2d)) { - hasher->destroy(hasher); sig->destroy(sig); return FALSE; } + /* MGF1 hash algorithm to be used for random oracle */ + oracle_alg = HASH_SHA512; + /* Initialize a couple of needed variables */ n = this->set->n; q = this->set->q; @@ -165,8 +160,7 @@ static bool verify_bliss(private_bliss_public_key_t *this, hash_algorithm_t alg, DBG3(DBG_LIB, "%3d %6d %4d %4d", i, u[i], ud[i], z2d[i]); } - if (!bliss_utils_generate_c(hasher, data_hash, ud, n, this->set->kappa, - indices)) + if (!bliss_utils_generate_c(oracle_alg, data_hash, ud, this->set, indices)) { goto end; } @@ -183,7 +177,6 @@ static bool verify_bliss(private_bliss_public_key_t *this, hash_algorithm_t alg, end: /* cleanup */ - hasher->destroy(hasher); sig->destroy(sig); fft->destroy(fft); free(az); |