Commit 81a88203 authored by Niels Möller's avatar Niels Möller

New files.

Rev: src/nettle/pkcs1-rsa-sha256.c:1.1
Rev: src/nettle/rsa-sha256-sign.c:1.1
Rev: src/nettle/rsa-sha256-verify.c:1.1
parent 75d00682
/* pkcs1-rsa-sha256.c
*
* PKCS stuff for rsa-sha256.
*/
/* nettle, low-level cryptographics library
*
* Copyright (C) 2001, 2003, 2006 Niels Mller
*
* 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 <assert.h>
#include <stdlib.h>
#include <string.h>
#include "rsa.h"
#include "bignum.h"
#include "pkcs1.h"
#include "nettle-internal.h"
/* From RFC 3447, Public-Key Cryptography Standards (PKCS) #1: RSA
* Cryptography Specifications Version 2.1.
*
* id-sha256 OBJECT IDENTIFIER ::=
* {joint-iso-itu-t(2) country(16) us(840) organization(1)
* gov(101) csor(3) nistalgorithm(4) hashalgs(2) 1}
*/
static const uint8_t
sha256_prefix[] =
{
/* 19 octets prefix, 32 octets hash, total 51 */
0x30, 49, /* SEQUENCE */
0x30, 13, /* SEQUENCE */
0x06, 9, /* OBJECT IDENTIFIER */
0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x01,
0x05, 0, /* NULL */
0x04, 32 /* OCTET STRING */
/* Here comes the raw hash value */
};
void
pkcs1_rsa_sha256_encode(mpz_t m, unsigned length, struct sha256_ctx *hash)
{
TMP_DECL(em, uint8_t, NETTLE_MAX_BIGNUM_BITS / 8);
TMP_ALLOC(em, length);
assert(length >= SHA256_DIGEST_SIZE);
pkcs1_signature_prefix(length - SHA256_DIGEST_SIZE, em,
sizeof(sha256_prefix),
sha256_prefix);
sha256_digest(hash, SHA256_DIGEST_SIZE, em + length - SHA256_DIGEST_SIZE);
nettle_mpz_set_str_256_u(m, length, em);
}
void
pkcs1_rsa_sha256_encode_digest(mpz_t m, unsigned length, const uint8_t *digest)
{
TMP_DECL(em, uint8_t, NETTLE_MAX_BIGNUM_BITS / 8);
TMP_ALLOC(em, length);
assert(length >= SHA256_DIGEST_SIZE);
pkcs1_signature_prefix(length - SHA256_DIGEST_SIZE, em,
sizeof(sha256_prefix),
sha256_prefix);
memcpy(em + length - SHA256_DIGEST_SIZE, digest, SHA256_DIGEST_SIZE);
nettle_mpz_set_str_256_u(m, length, em);
}
#endif /* WITH_PUBLIC_KEY */
/* rsa-sha256-sign.c
*
* Signatures using RSA and SHA256.
*/
/* nettle, low-level cryptographics library
*
* Copyright (C) 2001, 2003, 2006 Niels Mller
*
* 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 <assert.h>
#include "rsa.h"
#include "bignum.h"
#include "pkcs1.h"
void
rsa_sha256_sign(const struct rsa_private_key *key,
struct sha256_ctx *hash,
mpz_t s)
{
assert(key->size >= RSA_MINIMUM_N_OCTETS);
pkcs1_rsa_sha256_encode(s, key->size - 1, hash);
rsa_compute_root(key, s, s);
}
void
rsa_sha256_sign_digest(const struct rsa_private_key *key,
const uint8_t *digest,
mpz_t s)
{
assert(key->size >= RSA_MINIMUM_N_OCTETS);
pkcs1_rsa_sha256_encode_digest(s, key->size - 1, digest);
rsa_compute_root(key, s, s);
}
#endif /* WITH_PUBLIC_KEY */
/* rsa-sha256-verify.c
*
* Verifying signatures created with RSA and SHA256.
*/
/* nettle, low-level cryptographics library
*
* Copyright (C) 2001, 2003, 2006 Niels Mller
*
* 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 <assert.h>
#include "rsa.h"
#include "bignum.h"
#include "pkcs1.h"
int
rsa_sha256_verify(const struct rsa_public_key *key,
struct sha256_ctx *hash,
const mpz_t s)
{
int res;
mpz_t m;
assert(key->size >= RSA_MINIMUM_N_OCTETS);
mpz_init(m);
pkcs1_rsa_sha256_encode(m, key->size - 1, hash);
res = _rsa_verify(key, m, s);
mpz_clear(m);
return res;
}
int
rsa_sha256_verify_digest(const struct rsa_public_key *key,
const uint8_t *digest,
const mpz_t s)
{
int res;
mpz_t m;
assert(key->size >= RSA_MINIMUM_N_OCTETS);
mpz_init(m);
pkcs1_rsa_sha256_encode_digest(m, key->size - 1, digest);
res = _rsa_verify(key, m, s);
mpz_clear(m);
return res;
}
#endif /* WITH_PUBLIC_KEY */
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment