141 lines
4.9 KiB
C
Executable file
141 lines
4.9 KiB
C
Executable file
/* $OpenBSD: rsa_saos.c,v 1.24 2018/09/05 00:55:33 djm 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 <stdio.h>
|
|
#include <string.h>
|
|
|
|
#include <openssl/bn.h>
|
|
#include <openssl/err.h>
|
|
#include <openssl/objects.h>
|
|
#include <openssl/rsa.h>
|
|
#include <openssl/x509.h>
|
|
|
|
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)) {
|
|
RSAerror(RSA_R_DIGEST_TOO_BIG_FOR_RSA_KEY);
|
|
return 0;
|
|
}
|
|
s = malloc(j + 1);
|
|
if (s == NULL) {
|
|
RSAerror(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;
|
|
|
|
freezero(s, (unsigned int)j + 1);
|
|
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)) {
|
|
RSAerror(RSA_R_WRONG_SIGNATURE_LENGTH);
|
|
return 0;
|
|
}
|
|
|
|
s = malloc(siglen);
|
|
if (s == NULL) {
|
|
RSAerror(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 ||
|
|
timingsafe_bcmp(m, sig->data, m_len) != 0) {
|
|
RSAerror(RSA_R_BAD_SIGNATURE);
|
|
} else
|
|
ret = 1;
|
|
err:
|
|
ASN1_OCTET_STRING_free(sig);
|
|
freezero(s, (unsigned int)siglen);
|
|
return ret;
|
|
}
|