1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/os/ossrv/ssl/libcrypto/src/crypto/rsa/rsa_sign.c Fri Jun 15 03:10:57 2012 +0200
1.3 @@ -0,0 +1,248 @@
1.4 +/* crypto/rsa/rsa_sign.c */
1.5 +/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
1.6 + * All rights reserved.
1.7 + *
1.8 + * This package is an SSL implementation written
1.9 + * by Eric Young (eay@cryptsoft.com).
1.10 + * The implementation was written so as to conform with Netscapes SSL.
1.11 + *
1.12 + * This library is free for commercial and non-commercial use as long as
1.13 + * the following conditions are aheared to. The following conditions
1.14 + * apply to all code found in this distribution, be it the RC4, RSA,
1.15 + * lhash, DES, etc., code; not just the SSL code. The SSL documentation
1.16 + * included with this distribution is covered by the same copyright terms
1.17 + * except that the holder is Tim Hudson (tjh@cryptsoft.com).
1.18 + *
1.19 + * Copyright remains Eric Young's, and as such any Copyright notices in
1.20 + * the code are not to be removed.
1.21 + * If this package is used in a product, Eric Young should be given attribution
1.22 + * as the author of the parts of the library used.
1.23 + * This can be in the form of a textual message at program startup or
1.24 + * in documentation (online or textual) provided with the package.
1.25 + *
1.26 + * Redistribution and use in source and binary forms, with or without
1.27 + * modification, are permitted provided that the following conditions
1.28 + * are met:
1.29 + * 1. Redistributions of source code must retain the copyright
1.30 + * notice, this list of conditions and the following disclaimer.
1.31 + * 2. Redistributions in binary form must reproduce the above copyright
1.32 + * notice, this list of conditions and the following disclaimer in the
1.33 + * documentation and/or other materials provided with the distribution.
1.34 + * 3. All advertising materials mentioning features or use of this software
1.35 + * must display the following acknowledgement:
1.36 + * "This product includes cryptographic software written by
1.37 + * Eric Young (eay@cryptsoft.com)"
1.38 + * The word 'cryptographic' can be left out if the rouines from the library
1.39 + * being used are not cryptographic related :-).
1.40 + * 4. If you include any Windows specific code (or a derivative thereof) from
1.41 + * the apps directory (application code) you must include an acknowledgement:
1.42 + * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
1.43 + *
1.44 + * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
1.45 + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
1.46 + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
1.47 + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
1.48 + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
1.49 + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
1.50 + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
1.51 + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
1.52 + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
1.53 + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
1.54 + * SUCH DAMAGE.
1.55 + *
1.56 + * The licence and distribution terms for any publically available version or
1.57 + * derivative of this code cannot be changed. i.e. this code cannot simply be
1.58 + * copied and put under another distribution licence
1.59 + * [including the GNU Public Licence.]
1.60 + */
1.61 +
1.62 +#include <stdio.h>
1.63 +#include "cryptlib.h"
1.64 +#include <openssl/bn.h>
1.65 +#include <openssl/rsa.h>
1.66 +#include <openssl/objects.h>
1.67 +#include <openssl/x509.h>
1.68 +
1.69 +/* Size of an SSL signature: MD5+SHA1 */
1.70 +#define SSL_SIG_LENGTH 36
1.71 +
1.72 +EXPORT_C int RSA_sign(int type, const unsigned char *m, unsigned int m_len,
1.73 + unsigned char *sigret, unsigned int *siglen, RSA *rsa)
1.74 + {
1.75 + X509_SIG sig;
1.76 + ASN1_TYPE parameter;
1.77 + int i,j,ret=1;
1.78 + unsigned char *p, *tmps = NULL;
1.79 + const unsigned char *s = NULL;
1.80 + X509_ALGOR algor;
1.81 + ASN1_OCTET_STRING digest;
1.82 + if((rsa->flags & RSA_FLAG_SIGN_VER) && rsa->meth->rsa_sign)
1.83 + {
1.84 + return rsa->meth->rsa_sign(type, m, m_len,
1.85 + sigret, siglen, rsa);
1.86 + }
1.87 + /* Special case: SSL signature, just check the length */
1.88 + if(type == NID_md5_sha1) {
1.89 + if(m_len != SSL_SIG_LENGTH) {
1.90 + RSAerr(RSA_F_RSA_SIGN,RSA_R_INVALID_MESSAGE_LENGTH);
1.91 + return(0);
1.92 + }
1.93 + i = SSL_SIG_LENGTH;
1.94 + s = m;
1.95 + } else {
1.96 + sig.algor= &algor;
1.97 + sig.algor->algorithm=OBJ_nid2obj(type);
1.98 + if (sig.algor->algorithm == NULL)
1.99 + {
1.100 + RSAerr(RSA_F_RSA_SIGN,RSA_R_UNKNOWN_ALGORITHM_TYPE);
1.101 + return(0);
1.102 + }
1.103 + if (sig.algor->algorithm->length == 0)
1.104 + {
1.105 + RSAerr(RSA_F_RSA_SIGN,RSA_R_THE_ASN1_OBJECT_IDENTIFIER_IS_NOT_KNOWN_FOR_THIS_MD);
1.106 + return(0);
1.107 + }
1.108 + parameter.type=V_ASN1_NULL;
1.109 + parameter.value.ptr=NULL;
1.110 + sig.algor->parameter= ¶meter;
1.111 +
1.112 + sig.digest= &digest;
1.113 + sig.digest->data=(unsigned char *)m; /* TMP UGLY CAST */
1.114 + sig.digest->length=m_len;
1.115 +
1.116 + i=i2d_X509_SIG(&sig,NULL);
1.117 + }
1.118 + j=RSA_size(rsa);
1.119 + if (i > (j-RSA_PKCS1_PADDING_SIZE))
1.120 + {
1.121 + RSAerr(RSA_F_RSA_SIGN,RSA_R_DIGEST_TOO_BIG_FOR_RSA_KEY);
1.122 + return(0);
1.123 + }
1.124 + if(type != NID_md5_sha1) {
1.125 + tmps=(unsigned char *)OPENSSL_malloc((unsigned int)j+1);
1.126 + if (tmps == NULL)
1.127 + {
1.128 + RSAerr(RSA_F_RSA_SIGN,ERR_R_MALLOC_FAILURE);
1.129 + return(0);
1.130 + }
1.131 + p=tmps;
1.132 + i2d_X509_SIG(&sig,&p);
1.133 + s=tmps;
1.134 + }
1.135 + i=RSA_private_encrypt(i,s,sigret,rsa,RSA_PKCS1_PADDING);
1.136 + if (i <= 0)
1.137 + ret=0;
1.138 + else
1.139 + *siglen=i;
1.140 +
1.141 + if(type != NID_md5_sha1) {
1.142 + OPENSSL_cleanse(tmps,(unsigned int)j+1);
1.143 + OPENSSL_free(tmps);
1.144 + }
1.145 + return(ret);
1.146 + }
1.147 +
1.148 +EXPORT_C int RSA_verify(int dtype, const unsigned char *m, unsigned int m_len,
1.149 + unsigned char *sigbuf, unsigned int siglen, RSA *rsa)
1.150 + {
1.151 + int i,ret=0,sigtype;
1.152 + unsigned char *s;
1.153 + X509_SIG *sig=NULL;
1.154 +
1.155 + if (siglen != (unsigned int)RSA_size(rsa))
1.156 + {
1.157 + RSAerr(RSA_F_RSA_VERIFY,RSA_R_WRONG_SIGNATURE_LENGTH);
1.158 + return(0);
1.159 + }
1.160 +
1.161 + if((rsa->flags & RSA_FLAG_SIGN_VER) && rsa->meth->rsa_verify)
1.162 + {
1.163 + return rsa->meth->rsa_verify(dtype, m, m_len,
1.164 + sigbuf, siglen, rsa);
1.165 + }
1.166 +
1.167 + s=(unsigned char *)OPENSSL_malloc((unsigned int)siglen);
1.168 + if (s == NULL)
1.169 + {
1.170 + RSAerr(RSA_F_RSA_VERIFY,ERR_R_MALLOC_FAILURE);
1.171 + goto err;
1.172 + }
1.173 + if((dtype == NID_md5_sha1) && (m_len != SSL_SIG_LENGTH) ) {
1.174 + RSAerr(RSA_F_RSA_VERIFY,RSA_R_INVALID_MESSAGE_LENGTH);
1.175 + goto err;
1.176 + }
1.177 + i=RSA_public_decrypt((int)siglen,sigbuf,s,rsa,RSA_PKCS1_PADDING);
1.178 +
1.179 + if (i <= 0) goto err;
1.180 +
1.181 + /* Special case: SSL signature */
1.182 + if(dtype == NID_md5_sha1) {
1.183 + if((i != SSL_SIG_LENGTH) || memcmp(s, m, SSL_SIG_LENGTH))
1.184 + RSAerr(RSA_F_RSA_VERIFY,RSA_R_BAD_SIGNATURE);
1.185 + else ret = 1;
1.186 + } else {
1.187 + const unsigned char *p=s;
1.188 + sig=d2i_X509_SIG(NULL,&p,(long)i);
1.189 +
1.190 + if (sig == NULL) goto err;
1.191 +
1.192 + /* Excess data can be used to create forgeries */
1.193 + if(p != s+i)
1.194 + {
1.195 + RSAerr(RSA_F_RSA_VERIFY,RSA_R_BAD_SIGNATURE);
1.196 + goto err;
1.197 + }
1.198 +
1.199 + /* Parameters to the signature algorithm can also be used to
1.200 + create forgeries */
1.201 + if(sig->algor->parameter
1.202 + && ASN1_TYPE_get(sig->algor->parameter) != V_ASN1_NULL)
1.203 + {
1.204 + RSAerr(RSA_F_RSA_VERIFY,RSA_R_BAD_SIGNATURE);
1.205 + goto err;
1.206 + }
1.207 + sigtype=OBJ_obj2nid(sig->algor->algorithm);
1.208 +
1.209 +
1.210 + #ifdef RSA_DEBUG
1.211 + /* put a backward compatibility flag in EAY */
1.212 + fprintf(stderr,"in(%s) expect(%s)\n",OBJ_nid2ln(sigtype),
1.213 + OBJ_nid2ln(dtype));
1.214 + #endif
1.215 + if (sigtype != dtype)
1.216 + {
1.217 + if (((dtype == NID_md5) &&
1.218 + (sigtype == NID_md5WithRSAEncryption)) ||
1.219 + ((dtype == NID_md2) &&
1.220 + (sigtype == NID_md2WithRSAEncryption)))
1.221 + {
1.222 + /* ok, we will let it through */
1.223 +#if !defined(OPENSSL_NO_STDIO) && !defined(OPENSSL_SYS_WIN16)
1.224 + fprintf(stderr,"signature has problems, re-make with post SSLeay045\n");
1.225 +#endif
1.226 + }
1.227 + else
1.228 + {
1.229 + RSAerr(RSA_F_RSA_VERIFY,
1.230 + RSA_R_ALGORITHM_MISMATCH);
1.231 + goto err;
1.232 + }
1.233 + }
1.234 + if ( ((unsigned int)sig->digest->length != m_len) ||
1.235 + (memcmp(m,sig->digest->data,m_len) != 0))
1.236 + {
1.237 + RSAerr(RSA_F_RSA_VERIFY,RSA_R_BAD_SIGNATURE);
1.238 + }
1.239 + else
1.240 + ret=1;
1.241 + }
1.242 +err:
1.243 + if (sig != NULL) X509_SIG_free(sig);
1.244 + if (s != NULL)
1.245 + {
1.246 + OPENSSL_cleanse(s,(unsigned int)siglen);
1.247 + OPENSSL_free(s);
1.248 + }
1.249 + return(ret);
1.250 + }
1.251 +