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66 lines
1.7 KiB
C
66 lines
1.7 KiB
C
/* rsa-pss-sha256-sign-tr.c
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Signatures using RSA and SHA-256, with PSS padding.
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Copyright (C) 2017 Daiki Ueno
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This file is part of GNU Nettle.
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GNU Nettle is free software: you can redistribute it and/or
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modify it under the terms of either:
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* the GNU Lesser General Public License as published by the Free
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Software Foundation; either version 3 of the License, or (at your
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option) any later version.
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or
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* the GNU General Public License as published by the Free
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Software Foundation; either version 2 of the License, or (at your
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option) any later version.
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or both in parallel, as here.
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GNU Nettle is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received copies of the GNU General Public License and
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the GNU Lesser General Public License along with this program. If
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not, see http://www.gnu.org/licenses/.
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*/
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#if HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include "rsa.h"
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#include "rsa-internal.h"
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#include "bignum.h"
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#include "pss.h"
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int
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rsa_pss_sha256_sign_digest_tr(const struct rsa_public_key *pub,
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const struct rsa_private_key *key,
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void *random_ctx, nettle_random_func *random,
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size_t salt_length, const uint8_t *salt,
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const uint8_t *digest,
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mpz_t s)
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{
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mpz_t m;
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int res;
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mpz_init (m);
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res = (pss_encode_mgf1(m, mpz_sizeinbase(pub->n, 2) - 1, &nettle_sha256,
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salt_length, salt, digest)
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&& rsa_compute_root_tr (pub, key,
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random_ctx, random,
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s, m));
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mpz_clear (m);
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return res;
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}
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