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| 1 /* crypto/rsa/rsa_sign.c */ | |
| 2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) | |
| 3 * All rights reserved. | |
| 4 * | |
| 5 * This package is an SSL implementation written | |
| 6 * by Eric Young (eay@cryptsoft.com). | |
| 7 * The implementation was written so as to conform with Netscapes SSL. | |
| 8 * | |
| 9 * This library is free for commercial and non-commercial use as long as | |
| 10 * the following conditions are aheared to. The following conditions | |
| 11 * apply to all code found in this distribution, be it the RC4, RSA, | |
| 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation | |
| 13 * included with this distribution is covered by the same copyright terms | |
| 14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). | |
| 15 * | |
| 16 * Copyright remains Eric Young's, and as such any Copyright notices in | |
| 17 * the code are not to be removed. | |
| 18 * If this package is used in a product, Eric Young should be given attribution | |
| 19 * as the author of the parts of the library used. | |
| 20 * This can be in the form of a textual message at program startup or | |
| 21 * in documentation (online or textual) provided with the package. | |
| 22 * | |
| 23 * Redistribution and use in source and binary forms, with or without | |
| 24 * modification, are permitted provided that the following conditions | |
| 25 * are met: | |
| 26 * 1. Redistributions of source code must retain the copyright | |
| 27 * notice, this list of conditions and the following disclaimer. | |
| 28 * 2. Redistributions in binary form must reproduce the above copyright | |
| 29 * notice, this list of conditions and the following disclaimer in the | |
| 30 * documentation and/or other materials provided with the distribution. | |
| 31 * 3. All advertising materials mentioning features or use of this software | |
| 32 * must display the following acknowledgement: | |
| 33 * "This product includes cryptographic software written by | |
| 34 * Eric Young (eay@cryptsoft.com)" | |
| 35 * The word 'cryptographic' can be left out if the rouines from the library | |
| 36 * being used are not cryptographic related :-). | |
| 37 * 4. If you include any Windows specific code (or a derivative thereof) from | |
| 38 * the apps directory (application code) you must include an acknowledgement: | |
| 39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
| 40 * | |
| 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND | |
| 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | |
| 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| 51 * SUCH DAMAGE. | |
| 52 * | |
| 53 * The licence and distribution terms for any publically available version or | |
| 54 * derivative of this code cannot be changed. i.e. this code cannot simply be | |
| 55 * copied and put under another distribution licence | |
| 56 * [including the GNU Public Licence.] | |
| 57 */ | |
| 58 | |
| 59 #include <stdio.h> | |
| 60 #include "cryptlib.h" | |
| 61 #include <openssl/bn.h> | |
| 62 #include <openssl/rsa.h> | |
| 63 #include <openssl/objects.h> | |
| 64 #include <openssl/x509.h> | |
| 65 #include "rsa_locl.h" | |
| 66 | |
| 67 /* Size of an SSL signature: MD5+SHA1 */ | |
| 68 #define SSL_SIG_LENGTH 36 | |
| 69 | |
| 70 int RSA_sign(int type, const unsigned char *m, unsigned int m_len, | |
| 71 unsigned char *sigret, unsigned int *siglen, RSA *rsa) | |
| 72 { | |
| 73 X509_SIG sig; | |
| 74 ASN1_TYPE parameter; | |
| 75 int i,j,ret=1; | |
| 76 unsigned char *p, *tmps = NULL; | |
| 77 const unsigned char *s = NULL; | |
| 78 X509_ALGOR algor; | |
| 79 ASN1_OCTET_STRING digest; | |
| 80 #ifdef OPENSSL_FIPS | |
| 81 if (FIPS_mode() && !(rsa->meth->flags & RSA_FLAG_FIPS_METHOD) | |
| 82 && !(rsa->flags & RSA_FLAG_NON_FIPS_ALLOW)) | |
| 83 { | |
| 84 RSAerr(RSA_F_RSA_SIGN, RSA_R_NON_FIPS_RSA_METHOD); | |
| 85 return 0; | |
| 86 } | |
| 87 #endif | |
| 88 if((rsa->flags & RSA_FLAG_SIGN_VER) && rsa->meth->rsa_sign) | |
| 89 { | |
| 90 return rsa->meth->rsa_sign(type, m, m_len, | |
| 91 sigret, siglen, rsa); | |
| 92 } | |
| 93 /* Special case: SSL signature, just check the length */ | |
| 94 if(type == NID_md5_sha1) { | |
| 95 if(m_len != SSL_SIG_LENGTH) { | |
| 96 RSAerr(RSA_F_RSA_SIGN,RSA_R_INVALID_MESSAGE_LENGTH); | |
| 97 return(0); | |
| 98 } | |
| 99 i = SSL_SIG_LENGTH; | |
| 100 s = m; | |
| 101 } else { | |
| 102 sig.algor= &algor; | |
| 103 sig.algor->algorithm=OBJ_nid2obj(type); | |
| 104 if (sig.algor->algorithm == NULL) | |
| 105 { | |
| 106 RSAerr(RSA_F_RSA_SIGN,RSA_R_UNKNOWN_ALGORITHM_TYPE); | |
| 107 return(0); | |
| 108 } | |
| 109 if (sig.algor->algorithm->length == 0) | |
| 110 { | |
| 111 RSAerr(RSA_F_RSA_SIGN,RSA_R_THE_ASN1_OBJECT_IDENTIFIER_I
S_NOT_KNOWN_FOR_THIS_MD); | |
| 112 return(0); | |
| 113 } | |
| 114 parameter.type=V_ASN1_NULL; | |
| 115 parameter.value.ptr=NULL; | |
| 116 sig.algor->parameter= ¶meter; | |
| 117 | |
| 118 sig.digest= &digest; | |
| 119 sig.digest->data=(unsigned char *)m; /* TMP UGLY CAST */ | |
| 120 sig.digest->length=m_len; | |
| 121 | |
| 122 i=i2d_X509_SIG(&sig,NULL); | |
| 123 } | |
| 124 j=RSA_size(rsa); | |
| 125 if (i > (j-RSA_PKCS1_PADDING_SIZE)) | |
| 126 { | |
| 127 RSAerr(RSA_F_RSA_SIGN,RSA_R_DIGEST_TOO_BIG_FOR_RSA_KEY); | |
| 128 return(0); | |
| 129 } | |
| 130 if(type != NID_md5_sha1) { | |
| 131 tmps=(unsigned char *)OPENSSL_malloc((unsigned int)j+1); | |
| 132 if (tmps == NULL) | |
| 133 { | |
| 134 RSAerr(RSA_F_RSA_SIGN,ERR_R_MALLOC_FAILURE); | |
| 135 return(0); | |
| 136 } | |
| 137 p=tmps; | |
| 138 i2d_X509_SIG(&sig,&p); | |
| 139 s=tmps; | |
| 140 } | |
| 141 i=RSA_private_encrypt(i,s,sigret,rsa,RSA_PKCS1_PADDING); | |
| 142 if (i <= 0) | |
| 143 ret=0; | |
| 144 else | |
| 145 *siglen=i; | |
| 146 | |
| 147 if(type != NID_md5_sha1) { | |
| 148 OPENSSL_cleanse(tmps,(unsigned int)j+1); | |
| 149 OPENSSL_free(tmps); | |
| 150 } | |
| 151 return(ret); | |
| 152 } | |
| 153 | |
| 154 int int_rsa_verify(int dtype, const unsigned char *m, | |
| 155 unsigned int m_len, | |
| 156 unsigned char *rm, size_t *prm_len, | |
| 157 const unsigned char *sigbuf, size_t siglen, | |
| 158 RSA *rsa) | |
| 159 { | |
| 160 int i,ret=0,sigtype; | |
| 161 unsigned char *s; | |
| 162 X509_SIG *sig=NULL; | |
| 163 | |
| 164 #ifdef OPENSSL_FIPS | |
| 165 if (FIPS_mode() && !(rsa->meth->flags & RSA_FLAG_FIPS_METHOD) | |
| 166 && !(rsa->flags & RSA_FLAG_NON_FIPS_ALLOW)) | |
| 167 { | |
| 168 RSAerr(RSA_F_INT_RSA_VERIFY, RSA_R_NON_FIPS_RSA_METHOD); | |
| 169 return 0; | |
| 170 } | |
| 171 #endif | |
| 172 | |
| 173 if (siglen != (unsigned int)RSA_size(rsa)) | |
| 174 { | |
| 175 RSAerr(RSA_F_INT_RSA_VERIFY,RSA_R_WRONG_SIGNATURE_LENGTH); | |
| 176 return(0); | |
| 177 } | |
| 178 | |
| 179 if((dtype == NID_md5_sha1) && rm) | |
| 180 { | |
| 181 i = RSA_public_decrypt((int)siglen, | |
| 182 sigbuf,rm,rsa,RSA_PKCS1_PADDING); | |
| 183 if (i <= 0) | |
| 184 return 0; | |
| 185 *prm_len = i; | |
| 186 return 1; | |
| 187 } | |
| 188 | |
| 189 s=(unsigned char *)OPENSSL_malloc((unsigned int)siglen); | |
| 190 if (s == NULL) | |
| 191 { | |
| 192 RSAerr(RSA_F_INT_RSA_VERIFY,ERR_R_MALLOC_FAILURE); | |
| 193 goto err; | |
| 194 } | |
| 195 if((dtype == NID_md5_sha1) && (m_len != SSL_SIG_LENGTH) ) { | |
| 196 RSAerr(RSA_F_INT_RSA_VERIFY,RSA_R_INVALID_MESSAGE_LENGTH
); | |
| 197 goto err; | |
| 198 } | |
| 199 i=RSA_public_decrypt((int)siglen,sigbuf,s,rsa,RSA_PKCS1_PADDING); | |
| 200 | |
| 201 if (i <= 0) goto err; | |
| 202 /* Oddball MDC2 case: signature can be OCTET STRING. | |
| 203 * check for correct tag and length octets. | |
| 204 */ | |
| 205 if (dtype == NID_mdc2 && i == 18 && s[0] == 0x04 && s[1] == 0x10) | |
| 206 { | |
| 207 if (rm) | |
| 208 { | |
| 209 memcpy(rm, s + 2, 16); | |
| 210 *prm_len = 16; | |
| 211 ret = 1; | |
| 212 } | |
| 213 else if(memcmp(m, s + 2, 16)) | |
| 214 RSAerr(RSA_F_INT_RSA_VERIFY,RSA_R_BAD_SIGNATURE); | |
| 215 else | |
| 216 ret = 1; | |
| 217 } | |
| 218 | |
| 219 /* Special case: SSL signature */ | |
| 220 if(dtype == NID_md5_sha1) { | |
| 221 if((i != SSL_SIG_LENGTH) || memcmp(s, m, SSL_SIG_LENGTH)) | |
| 222 RSAerr(RSA_F_INT_RSA_VERIFY,RSA_R_BAD_SIGNATURE)
; | |
| 223 else ret = 1; | |
| 224 } else { | |
| 225 const unsigned char *p=s; | |
| 226 sig=d2i_X509_SIG(NULL,&p,(long)i); | |
| 227 | |
| 228 if (sig == NULL) goto err; | |
| 229 | |
| 230 /* Excess data can be used to create forgeries */ | |
| 231 if(p != s+i) | |
| 232 { | |
| 233 RSAerr(RSA_F_INT_RSA_VERIFY,RSA_R_BAD_SIGNATURE); | |
| 234 goto err; | |
| 235 } | |
| 236 | |
| 237 /* Parameters to the signature algorithm can also be used to | |
| 238 create forgeries */ | |
| 239 if(sig->algor->parameter | |
| 240 && ASN1_TYPE_get(sig->algor->parameter) != V_ASN1_NULL) | |
| 241 { | |
| 242 RSAerr(RSA_F_INT_RSA_VERIFY,RSA_R_BAD_SIGNATURE); | |
| 243 goto err; | |
| 244 } | |
| 245 | |
| 246 sigtype=OBJ_obj2nid(sig->algor->algorithm); | |
| 247 | |
| 248 | |
| 249 #ifdef RSA_DEBUG | |
| 250 /* put a backward compatibility flag in EAY */ | |
| 251 fprintf(stderr,"in(%s) expect(%s)\n",OBJ_nid2ln(sigtype), | |
| 252 OBJ_nid2ln(dtype)); | |
| 253 #endif | |
| 254 if (sigtype != dtype) | |
| 255 { | |
| 256 if (((dtype == NID_md5) && | |
| 257 (sigtype == NID_md5WithRSAEncryption)) || | |
| 258 ((dtype == NID_md2) && | |
| 259 (sigtype == NID_md2WithRSAEncryption))) | |
| 260 { | |
| 261 /* ok, we will let it through */ | |
| 262 #if !defined(OPENSSL_NO_STDIO) && !defined(OPENSSL_SYS_WIN16) | |
| 263 fprintf(stderr,"signature has problems, re-make
with post SSLeay045\n"); | |
| 264 #endif | |
| 265 } | |
| 266 else | |
| 267 { | |
| 268 RSAerr(RSA_F_INT_RSA_VERIFY, | |
| 269 RSA_R_ALGORITHM_MISMATCH); | |
| 270 goto err; | |
| 271 } | |
| 272 } | |
| 273 if (rm) | |
| 274 { | |
| 275 const EVP_MD *md; | |
| 276 md = EVP_get_digestbynid(dtype); | |
| 277 if (md && (EVP_MD_size(md) != sig->digest->length)) | |
| 278 RSAerr(RSA_F_INT_RSA_VERIFY, | |
| 279 RSA_R_INVALID_DIGEST_LENGTH); | |
| 280 else | |
| 281 { | |
| 282 memcpy(rm, sig->digest->data, | |
| 283 sig->digest->length); | |
| 284 *prm_len = sig->digest->length; | |
| 285 ret = 1; | |
| 286 } | |
| 287 } | |
| 288 else if (((unsigned int)sig->digest->length != m_len) || | |
| 289 (memcmp(m,sig->digest->data,m_len) != 0)) | |
| 290 { | |
| 291 RSAerr(RSA_F_INT_RSA_VERIFY,RSA_R_BAD_SIGNATURE); | |
| 292 } | |
| 293 else | |
| 294 ret=1; | |
| 295 } | |
| 296 err: | |
| 297 if (sig != NULL) X509_SIG_free(sig); | |
| 298 if (s != NULL) | |
| 299 { | |
| 300 OPENSSL_cleanse(s,(unsigned int)siglen); | |
| 301 OPENSSL_free(s); | |
| 302 } | |
| 303 return(ret); | |
| 304 } | |
| 305 | |
| 306 int RSA_verify(int dtype, const unsigned char *m, unsigned int m_len, | |
| 307 const unsigned char *sigbuf, unsigned int siglen, | |
| 308 RSA *rsa) | |
| 309 { | |
| 310 | |
| 311 if((rsa->flags & RSA_FLAG_SIGN_VER) && rsa->meth->rsa_verify) | |
| 312 { | |
| 313 return rsa->meth->rsa_verify(dtype, m, m_len, | |
| 314 sigbuf, siglen, rsa); | |
| 315 } | |
| 316 | |
| 317 return int_rsa_verify(dtype, m, m_len, NULL, NULL, sigbuf, siglen, rsa); | |
| 318 } | |
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Chromium Code Reviews
Issue 2072073002:
Delete bundled copy of OpenSSL and replace with README. (Closed)
Base URL: https://chromium.googlesource.com/chromium/deps/openssl@master