diff options
Diffstat (limited to 'dsa.c')
-rw-r--r-- | dsa.c | 93 |
1 files changed, 93 insertions, 0 deletions
@@ -0,0 +1,93 @@ +/* dsa.h + * + * The DSA publickey algorithm. + */ + +/* nettle, low-level cryptographics library + * + * Copyright (C) 2002 Niels Möller + * + * The nettle library is free software; you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License as published by + * the Free Software Foundation; either version 2.1 of the License, or (at your + * option) any later version. + * + * The nettle library is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY + * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public + * License for more details. + * + * You should have received a copy of the GNU Lesser General Public License + * along with the nettle library; see the file COPYING.LIB. If not, write to + * the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, + * MA 02111-1307, USA. + */ + +#if HAVE_CONFIG_H +#include "config.h" +#endif + +#if WITH_PUBLIC_KEY + +#include "dsa.h" + +#include "bignum.h" + +void +dsa_public_key_init(struct dsa_public_key *key) +{ + mpz_init(key->p); + mpz_init(key->q); + mpz_init(key->g); + mpz_init(key->y); +} + +void +dsa_public_key_clear(struct dsa_public_key *key) +{ + mpz_clear(key->p); + mpz_clear(key->q); + mpz_clear(key->g); + mpz_clear(key->y); +} + + +void +dsa_private_key_init(struct dsa_private_key *key) +{ + dsa_public_key_init(&key->pub); + mpz_init(key->x); +} + +void +dsa_private_key_clear(struct dsa_private_key *key) +{ + dsa_public_key_clear(&key->pub); + mpz_clear(key->x); +} + + +void +dsa_signature_init(struct dsa_signature *signature) +{ + mpz_init(signature->r); + mpz_init(signature->s); +} + +void +dsa_signature_clear(struct dsa_signature *signature) +{ + mpz_clear(signature->r); + mpz_clear(signature->s); +} + +void +_dsa_hash(mpz_t x, struct sha1_ctx *hash) +{ + uint8_t digest[SHA1_DIGEST_SIZE]; + sha1_digest(hash, sizeof(digest), digest); + + nettle_mpz_set_str_256(x, sizeof(digest), digest); +} + +#endif /* WITH_PUBLIC_KEY */ |