/* $OpenBSD: rsa_saos.c,v 1.18 2015/09/10 15:56:25 jsing Exp $ */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
* All rights reserved.
*
* This package is an SSL implementation written
* by Eric Young (eay@cryptsoft.com).
* The implementation was written so as to conform with Netscapes SSL.
*
* This library is free for commercial and non-commercial use as long as
* the following conditions are aheared to. The following conditions
* apply to all code found in this distribution, be it the RC4, RSA,
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
* included with this distribution is covered by the same copyright terms
* except that the holder is Tim Hudson (tjh@cryptsoft.com).
*
* Copyright remains Eric Young's, and as such any Copyright notices in
* the code are not to be removed.
* If this package is used in a product, Eric Young should be given attribution
* as the author of the parts of the library used.
* This can be in the form of a textual message at program startup or
* in documentation (online or textual) provided with the package.
*
* 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 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 acknowledgement:
* "This product includes cryptographic software written by
* Eric Young (eay@cryptsoft.com)"
* The word 'cryptographic' can be left out if the rouines from the library
* being used are not cryptographic related :-).
* 4. If you include any Windows specific code (or a derivative thereof) from
* the apps directory (application code) you must include an acknowledgement:
* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
*
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
* ANY EXPRESS 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 AUTHOR OR 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.
*
* The licence and distribution terms for any publically available version or
* derivative of this code cannot be changed. i.e. this code cannot simply be
* copied and put under another distribution licence
* [including the GNU Public Licence.]
*/
#include
#include
#include
#include
#include
#include
#include
int
RSA_sign_ASN1_OCTET_STRING(int type, const unsigned char *m, unsigned int m_len,
unsigned char *sigret, unsigned int *siglen, RSA *rsa)
{
ASN1_OCTET_STRING sig;
int i, j, ret = 1;
unsigned char *p, *s;
sig.type = V_ASN1_OCTET_STRING;
sig.length = m_len;
sig.data = (unsigned char *)m;
i = i2d_ASN1_OCTET_STRING(&sig, NULL);
j = RSA_size(rsa);
if (i > (j - RSA_PKCS1_PADDING_SIZE)) {
RSAerr(RSA_F_RSA_SIGN_ASN1_OCTET_STRING,
RSA_R_DIGEST_TOO_BIG_FOR_RSA_KEY);
return 0;
}
s = malloc(j + 1);
if (s == NULL) {
RSAerr(RSA_F_RSA_SIGN_ASN1_OCTET_STRING, ERR_R_MALLOC_FAILURE);
return 0;
}
p = s;
i2d_ASN1_OCTET_STRING(&sig, &p);
i = RSA_private_encrypt(i, s, sigret, rsa, RSA_PKCS1_PADDING);
if (i <= 0)
ret = 0;
else
*siglen = i;
explicit_bzero(s, (unsigned int)j + 1);
free(s);
return ret;
}
int
RSA_verify_ASN1_OCTET_STRING(int dtype, const unsigned char *m,
unsigned int m_len, unsigned char *sigbuf, unsigned int siglen, RSA *rsa)
{
int i, ret = 0;
unsigned char *s;
const unsigned char *p;
ASN1_OCTET_STRING *sig = NULL;
if (siglen != (unsigned int)RSA_size(rsa)) {
RSAerr(RSA_F_RSA_VERIFY_ASN1_OCTET_STRING,
RSA_R_WRONG_SIGNATURE_LENGTH);
return 0;
}
s = malloc(siglen);
if (s == NULL) {
RSAerr(RSA_F_RSA_VERIFY_ASN1_OCTET_STRING,
ERR_R_MALLOC_FAILURE);
goto err;
}
i = RSA_public_decrypt((int)siglen, sigbuf, s, rsa, RSA_PKCS1_PADDING);
if (i <= 0)
goto err;
p = s;
sig = d2i_ASN1_OCTET_STRING(NULL, &p, (long)i);
if (sig == NULL)
goto err;
if ((unsigned int)sig->length != m_len ||
memcmp(m, sig->data, m_len) != 0) {
RSAerr(RSA_F_RSA_VERIFY_ASN1_OCTET_STRING,
RSA_R_BAD_SIGNATURE);
} else
ret = 1;
err:
ASN1_OCTET_STRING_free(sig);
if (s != NULL) {
explicit_bzero(s, (unsigned int)siglen);
free(s);
}
return ret;
}