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/* fips_dsa_sign.c */
/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
* project 2007.
*/
/* ====================================================================
* Copyright (c) 2011 The OpenSSL Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. All advertising materials mentioning features or use of this
* software must display the following acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
*
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* licensing@OpenSSL.org.
*
* 5. Products derived from this software may not be called "OpenSSL"
* nor may "OpenSSL" appear in their names without prior written
* permission of the OpenSSL Project.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
*
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
* ====================================================================
*
* This product includes cryptographic software written by Eric Young
* (eay@cryptsoft.com). This product includes software written by Tim
* Hudson (tjh@cryptsoft.com).
*
*/
#define OPENSSL_FIPSAPI
#include <string.h>
#include <openssl/evp.h>
#include <openssl/dsa.h>
#include <openssl/err.h>
#include <openssl/sha.h>
#include <openssl/bn.h>
#ifdef OPENSSL_FIPS
/* FIPS versions of DSA_sign() and DSA_verify().
* Handle DSA_SIG structures to avoid need to handle ASN1.
*/
DSA_SIG * FIPS_dsa_sign_ctx(DSA *dsa, EVP_MD_CTX *ctx)
{
DSA_SIG *s;
unsigned char dig[EVP_MAX_MD_SIZE];
unsigned int dlen;
FIPS_digestfinal(ctx, dig, &dlen);
s = dsa->meth->dsa_do_sign(dig,dlen,dsa);
OPENSSL_cleanse(dig, dlen);
return s;
}
DSA_SIG * FIPS_dsa_sign_digest(DSA *dsa, const unsigned char *dig, int dlen)
{
if (FIPS_selftest_failed())
{
FIPSerr(FIPS_F_FIPS_DSA_SIGN_DIGEST, FIPS_R_SELFTEST_FAILED);
return NULL;
}
return dsa->meth->dsa_do_sign(dig, dlen, dsa);
}
int FIPS_dsa_verify_ctx(DSA *dsa, EVP_MD_CTX *ctx, DSA_SIG *s)
{
int ret=-1;
unsigned char dig[EVP_MAX_MD_SIZE];
unsigned int dlen;
FIPS_digestfinal(ctx, dig, &dlen);
ret=dsa->meth->dsa_do_verify(dig,dlen,s,dsa);
OPENSSL_cleanse(dig, dlen);
return ret;
}
int FIPS_dsa_verify_digest(DSA *dsa,
const unsigned char *dig, int dlen, DSA_SIG *s)
{
if (FIPS_selftest_failed())
{
FIPSerr(FIPS_F_FIPS_DSA_VERIFY_DIGEST, FIPS_R_SELFTEST_FAILED);
return -1;
}
return dsa->meth->dsa_do_verify(dig,dlen,s,dsa);
}
int FIPS_dsa_verify(DSA *dsa, const unsigned char *msg, size_t msglen,
const EVP_MD *mhash, DSA_SIG *s)
{
int ret=-1;
unsigned char dig[EVP_MAX_MD_SIZE];
unsigned int dlen;
FIPS_digest(msg, msglen, dig, &dlen, mhash);
ret=FIPS_dsa_verify_digest(dsa, dig, dlen, s);
OPENSSL_cleanse(dig, dlen);
return ret;
}
DSA_SIG * FIPS_dsa_sign(DSA *dsa, const unsigned char *msg, size_t msglen,
const EVP_MD *mhash)
{
DSA_SIG *s;
unsigned char dig[EVP_MAX_MD_SIZE];
unsigned int dlen;
FIPS_digest(msg, msglen, dig, &dlen, mhash);
s = FIPS_dsa_sign_digest(dsa, dig, dlen);
OPENSSL_cleanse(dig, dlen);
return s;
}
#endif
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