check in v3.8.2 source
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143
crypto/rsa/rsa_saos.c
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143
crypto/rsa/rsa_saos.c
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/* $OpenBSD: rsa_saos.c,v 1.25 2023/07/08 12:26:45 beck Exp $ */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.]
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*/
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#include <stdio.h>
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#include <string.h>
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#include <openssl/bn.h>
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#include <openssl/err.h>
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#include <openssl/objects.h>
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#include <openssl/rsa.h>
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#include <openssl/x509.h>
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int
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RSA_sign_ASN1_OCTET_STRING(int type, const unsigned char *m, unsigned int m_len,
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unsigned char *sigret, unsigned int *siglen, RSA *rsa)
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{
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ASN1_OCTET_STRING sig;
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int i, j, ret = 1;
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unsigned char *p, *s;
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sig.type = V_ASN1_OCTET_STRING;
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sig.length = m_len;
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sig.data = (unsigned char *)m;
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i = i2d_ASN1_OCTET_STRING(&sig, NULL);
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j = RSA_size(rsa);
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if (i > (j - RSA_PKCS1_PADDING_SIZE)) {
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RSAerror(RSA_R_DIGEST_TOO_BIG_FOR_RSA_KEY);
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return 0;
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}
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s = malloc(j + 1);
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if (s == NULL) {
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RSAerror(ERR_R_MALLOC_FAILURE);
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return 0;
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}
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p = s;
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i2d_ASN1_OCTET_STRING(&sig, &p);
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i = RSA_private_encrypt(i, s, sigret, rsa, RSA_PKCS1_PADDING);
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if (i <= 0)
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ret = 0;
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else
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*siglen = i;
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freezero(s, (unsigned int)j + 1);
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return ret;
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}
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LCRYPTO_ALIAS(RSA_sign_ASN1_OCTET_STRING);
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int
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RSA_verify_ASN1_OCTET_STRING(int dtype, const unsigned char *m,
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unsigned int m_len, unsigned char *sigbuf, unsigned int siglen, RSA *rsa)
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{
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int i, ret = 0;
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unsigned char *s;
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const unsigned char *p;
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ASN1_OCTET_STRING *sig = NULL;
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if (siglen != (unsigned int)RSA_size(rsa)) {
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RSAerror(RSA_R_WRONG_SIGNATURE_LENGTH);
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return 0;
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}
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s = malloc(siglen);
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if (s == NULL) {
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RSAerror(ERR_R_MALLOC_FAILURE);
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goto err;
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}
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i = RSA_public_decrypt((int)siglen, sigbuf, s, rsa, RSA_PKCS1_PADDING);
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if (i <= 0)
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goto err;
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p = s;
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sig = d2i_ASN1_OCTET_STRING(NULL, &p, (long)i);
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if (sig == NULL)
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goto err;
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if ((unsigned int)sig->length != m_len ||
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timingsafe_bcmp(m, sig->data, m_len) != 0) {
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RSAerror(RSA_R_BAD_SIGNATURE);
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} else
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ret = 1;
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err:
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ASN1_OCTET_STRING_free(sig);
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freezero(s, (unsigned int)siglen);
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return ret;
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}
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LCRYPTO_ALIAS(RSA_verify_ASN1_OCTET_STRING);
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