156083Skris/* crypto/rsa/rsa_saos.c */ 256083Skris/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 356083Skris * All rights reserved. 456083Skris * 556083Skris * This package is an SSL implementation written 656083Skris * by Eric Young (eay@cryptsoft.com). 756083Skris * The implementation was written so as to conform with Netscapes SSL. 8280297Sjkim * 956083Skris * This library is free for commercial and non-commercial use as long as 1056083Skris * the following conditions are aheared to. The following conditions 1156083Skris * apply to all code found in this distribution, be it the RC4, RSA, 1256083Skris * lhash, DES, etc., code; not just the SSL code. The SSL documentation 1356083Skris * included with this distribution is covered by the same copyright terms 1456083Skris * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15280297Sjkim * 1656083Skris * Copyright remains Eric Young's, and as such any Copyright notices in 1756083Skris * the code are not to be removed. 1856083Skris * If this package is used in a product, Eric Young should be given attribution 1956083Skris * as the author of the parts of the library used. 2056083Skris * This can be in the form of a textual message at program startup or 2156083Skris * in documentation (online or textual) provided with the package. 22280297Sjkim * 2356083Skris * Redistribution and use in source and binary forms, with or without 2456083Skris * modification, are permitted provided that the following conditions 2556083Skris * are met: 2656083Skris * 1. Redistributions of source code must retain the copyright 2756083Skris * notice, this list of conditions and the following disclaimer. 2856083Skris * 2. Redistributions in binary form must reproduce the above copyright 2956083Skris * notice, this list of conditions and the following disclaimer in the 3056083Skris * documentation and/or other materials provided with the distribution. 3156083Skris * 3. All advertising materials mentioning features or use of this software 3256083Skris * must display the following acknowledgement: 3356083Skris * "This product includes cryptographic software written by 3456083Skris * Eric Young (eay@cryptsoft.com)" 3556083Skris * The word 'cryptographic' can be left out if the rouines from the library 3656083Skris * being used are not cryptographic related :-). 37280297Sjkim * 4. If you include any Windows specific code (or a derivative thereof) from 3856083Skris * the apps directory (application code) you must include an acknowledgement: 3956083Skris * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40280297Sjkim * 4156083Skris * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 4256083Skris * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 4356083Skris * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 4456083Skris * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 4556083Skris * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 4656083Skris * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 4756083Skris * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 4856083Skris * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 4956083Skris * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 5056083Skris * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 5156083Skris * SUCH DAMAGE. 52280297Sjkim * 5356083Skris * The licence and distribution terms for any publically available version or 5456083Skris * derivative of this code cannot be changed. i.e. this code cannot simply be 5556083Skris * copied and put under another distribution licence 5656083Skris * [including the GNU Public Licence.] 5756083Skris */ 5856083Skris 5956083Skris#include <stdio.h> 6056083Skris#include "cryptlib.h" 6156083Skris#include <openssl/bn.h> 6256083Skris#include <openssl/rsa.h> 6356083Skris#include <openssl/objects.h> 6456083Skris#include <openssl/x509.h> 6556083Skris 66109998Smarkmint RSA_sign_ASN1_OCTET_STRING(int type, 67280297Sjkim const unsigned char *m, unsigned int m_len, 68280297Sjkim unsigned char *sigret, unsigned int *siglen, 69280297Sjkim RSA *rsa) 70280297Sjkim{ 71280297Sjkim ASN1_OCTET_STRING sig; 72280297Sjkim int i, j, ret = 1; 73280297Sjkim unsigned char *p, *s; 7456083Skris 75280297Sjkim sig.type = V_ASN1_OCTET_STRING; 76280297Sjkim sig.length = m_len; 77280297Sjkim sig.data = (unsigned char *)m; 7856083Skris 79280297Sjkim i = i2d_ASN1_OCTET_STRING(&sig, NULL); 80280297Sjkim j = RSA_size(rsa); 81280297Sjkim if (i > (j - RSA_PKCS1_PADDING_SIZE)) { 82280297Sjkim RSAerr(RSA_F_RSA_SIGN_ASN1_OCTET_STRING, 83280297Sjkim RSA_R_DIGEST_TOO_BIG_FOR_RSA_KEY); 84280297Sjkim return (0); 85280297Sjkim } 86280297Sjkim s = (unsigned char *)OPENSSL_malloc((unsigned int)j + 1); 87280297Sjkim if (s == NULL) { 88280297Sjkim RSAerr(RSA_F_RSA_SIGN_ASN1_OCTET_STRING, ERR_R_MALLOC_FAILURE); 89280297Sjkim return (0); 90280297Sjkim } 91280297Sjkim p = s; 92280297Sjkim i2d_ASN1_OCTET_STRING(&sig, &p); 93280297Sjkim i = RSA_private_encrypt(i, s, sigret, rsa, RSA_PKCS1_PADDING); 94280297Sjkim if (i <= 0) 95280297Sjkim ret = 0; 96280297Sjkim else 97280297Sjkim *siglen = i; 9856083Skris 99280297Sjkim OPENSSL_cleanse(s, (unsigned int)j + 1); 100280297Sjkim OPENSSL_free(s); 101280297Sjkim return (ret); 102280297Sjkim} 10356083Skris 104109998Smarkmint RSA_verify_ASN1_OCTET_STRING(int dtype, 105280297Sjkim const unsigned char *m, 106280297Sjkim unsigned int m_len, unsigned char *sigbuf, 107280297Sjkim unsigned int siglen, RSA *rsa) 108280297Sjkim{ 109280297Sjkim int i, ret = 0; 110280297Sjkim unsigned char *s; 111280297Sjkim const unsigned char *p; 112280297Sjkim ASN1_OCTET_STRING *sig = NULL; 11356083Skris 114280297Sjkim if (siglen != (unsigned int)RSA_size(rsa)) { 115280297Sjkim RSAerr(RSA_F_RSA_VERIFY_ASN1_OCTET_STRING, 116280297Sjkim RSA_R_WRONG_SIGNATURE_LENGTH); 117280297Sjkim return (0); 118280297Sjkim } 11956083Skris 120280297Sjkim s = (unsigned char *)OPENSSL_malloc((unsigned int)siglen); 121280297Sjkim if (s == NULL) { 122280297Sjkim RSAerr(RSA_F_RSA_VERIFY_ASN1_OCTET_STRING, ERR_R_MALLOC_FAILURE); 123280297Sjkim goto err; 124280297Sjkim } 125280297Sjkim i = RSA_public_decrypt((int)siglen, sigbuf, s, rsa, RSA_PKCS1_PADDING); 12656083Skris 127280297Sjkim if (i <= 0) 128280297Sjkim goto err; 12956083Skris 130280297Sjkim p = s; 131280297Sjkim sig = d2i_ASN1_OCTET_STRING(NULL, &p, (long)i); 132280297Sjkim if (sig == NULL) 133280297Sjkim goto err; 13456083Skris 135280297Sjkim if (((unsigned int)sig->length != m_len) || 136280297Sjkim (memcmp(m, sig->data, m_len) != 0)) { 137280297Sjkim RSAerr(RSA_F_RSA_VERIFY_ASN1_OCTET_STRING, RSA_R_BAD_SIGNATURE); 138280297Sjkim } else 139280297Sjkim ret = 1; 140280297Sjkim err: 141280297Sjkim if (sig != NULL) 142280297Sjkim M_ASN1_OCTET_STRING_free(sig); 143280297Sjkim if (s != NULL) { 144280297Sjkim OPENSSL_cleanse(s, (unsigned int)siglen); 145280297Sjkim OPENSSL_free(s); 146280297Sjkim } 147280297Sjkim return (ret); 148280297Sjkim} 149