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| 1 /* pk7_smime.c */ | |
| 2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL | |
| 3 * project. | |
| 4 */ | |
| 5 /* ==================================================================== | |
| 6 * Copyright (c) 1999-2004 The OpenSSL Project. All rights reserved. | |
| 7 * | |
| 8 * Redistribution and use in source and binary forms, with or without | |
| 9 * modification, are permitted provided that the following conditions | |
| 10 * are met: | |
| 11 * | |
| 12 * 1. Redistributions of source code must retain the above copyright | |
| 13 * notice, this list of conditions and the following disclaimer. | |
| 14 * | |
| 15 * 2. Redistributions in binary form must reproduce the above copyright | |
| 16 * notice, this list of conditions and the following disclaimer in | |
| 17 * the documentation and/or other materials provided with the | |
| 18 * distribution. | |
| 19 * | |
| 20 * 3. All advertising materials mentioning features or use of this | |
| 21 * software must display the following acknowledgment: | |
| 22 * "This product includes software developed by the OpenSSL Project | |
| 23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" | |
| 24 * | |
| 25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
| 26 * endorse or promote products derived from this software without | |
| 27 * prior written permission. For written permission, please contact | |
| 28 * licensing@OpenSSL.org. | |
| 29 * | |
| 30 * 5. Products derived from this software may not be called "OpenSSL" | |
| 31 * nor may "OpenSSL" appear in their names without prior written | |
| 32 * permission of the OpenSSL Project. | |
| 33 * | |
| 34 * 6. Redistributions of any form whatsoever must retain the following | |
| 35 * acknowledgment: | |
| 36 * "This product includes software developed by the OpenSSL Project | |
| 37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" | |
| 38 * | |
| 39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
| 40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
| 42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
| 43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
| 45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
| 46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
| 48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
| 49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
| 50 * OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 51 * ==================================================================== | |
| 52 * | |
| 53 * This product includes cryptographic software written by Eric Young | |
| 54 * (eay@cryptsoft.com). This product includes software written by Tim | |
| 55 * Hudson (tjh@cryptsoft.com). | |
| 56 * | |
| 57 */ | |
| 58 | |
| 59 /* Simple PKCS#7 processing functions */ | |
| 60 | |
| 61 #include <stdio.h> | |
| 62 #include "cryptlib.h" | |
| 63 #include <openssl/x509.h> | |
| 64 #include <openssl/x509v3.h> | |
| 65 | |
| 66 static int pkcs7_copy_existing_digest(PKCS7 *p7, PKCS7_SIGNER_INFO *si); | |
| 67 | |
| 68 PKCS7 *PKCS7_sign(X509 *signcert, EVP_PKEY *pkey, STACK_OF(X509) *certs, | |
| 69 BIO *data, int flags) | |
| 70 { | |
| 71 PKCS7 *p7; | |
| 72 int i; | |
| 73 | |
| 74 if(!(p7 = PKCS7_new())) | |
| 75 { | |
| 76 PKCS7err(PKCS7_F_PKCS7_SIGN,ERR_R_MALLOC_FAILURE); | |
| 77 return NULL; | |
| 78 } | |
| 79 | |
| 80 if (!PKCS7_set_type(p7, NID_pkcs7_signed)) | |
| 81 goto err; | |
| 82 | |
| 83 if (!PKCS7_content_new(p7, NID_pkcs7_data)) | |
| 84 goto err; | |
| 85 | |
| 86 if (pkey && !PKCS7_sign_add_signer(p7, signcert, pkey, NULL, flags)) | |
| 87 { | |
| 88 PKCS7err(PKCS7_F_PKCS7_SIGN,PKCS7_R_PKCS7_ADD_SIGNER_ERROR); | |
| 89 goto err; | |
| 90 } | |
| 91 | |
| 92 if(!(flags & PKCS7_NOCERTS)) | |
| 93 { | |
| 94 for(i = 0; i < sk_X509_num(certs); i++) | |
| 95 { | |
| 96 if (!PKCS7_add_certificate(p7, sk_X509_value(certs, i))) | |
| 97 goto err; | |
| 98 } | |
| 99 } | |
| 100 | |
| 101 if(flags & PKCS7_DETACHED) | |
| 102 PKCS7_set_detached(p7, 1); | |
| 103 | |
| 104 if (flags & (PKCS7_STREAM|PKCS7_PARTIAL)) | |
| 105 return p7; | |
| 106 | |
| 107 if (PKCS7_final(p7, data, flags)) | |
| 108 return p7; | |
| 109 | |
| 110 err: | |
| 111 PKCS7_free(p7); | |
| 112 return NULL; | |
| 113 } | |
| 114 | |
| 115 int PKCS7_final(PKCS7 *p7, BIO *data, int flags) | |
| 116 { | |
| 117 BIO *p7bio; | |
| 118 int ret = 0; | |
| 119 if (!(p7bio = PKCS7_dataInit(p7, NULL))) | |
| 120 { | |
| 121 PKCS7err(PKCS7_F_PKCS7_FINAL,ERR_R_MALLOC_FAILURE); | |
| 122 return 0; | |
| 123 } | |
| 124 | |
| 125 SMIME_crlf_copy(data, p7bio, flags); | |
| 126 | |
| 127 (void)BIO_flush(p7bio); | |
| 128 | |
| 129 | |
| 130 if (!PKCS7_dataFinal(p7,p7bio)) | |
| 131 { | |
| 132 PKCS7err(PKCS7_F_PKCS7_FINAL,PKCS7_R_PKCS7_DATASIGN); | |
| 133 goto err; | |
| 134 } | |
| 135 | |
| 136 ret = 1; | |
| 137 | |
| 138 err: | |
| 139 BIO_free_all(p7bio); | |
| 140 | |
| 141 return ret; | |
| 142 | |
| 143 } | |
| 144 | |
| 145 /* Check to see if a cipher exists and if so add S/MIME capabilities */ | |
| 146 | |
| 147 static int add_cipher_smcap(STACK_OF(X509_ALGOR) *sk, int nid, int arg) | |
| 148 { | |
| 149 if (EVP_get_cipherbynid(nid)) | |
| 150 return PKCS7_simple_smimecap(sk, nid, arg); | |
| 151 return 1; | |
| 152 } | |
| 153 | |
| 154 static int add_digest_smcap(STACK_OF(X509_ALGOR) *sk, int nid, int arg) | |
| 155 { | |
| 156 if (EVP_get_digestbynid(nid)) | |
| 157 return PKCS7_simple_smimecap(sk, nid, arg); | |
| 158 return 1; | |
| 159 } | |
| 160 | |
| 161 PKCS7_SIGNER_INFO *PKCS7_sign_add_signer(PKCS7 *p7, X509 *signcert, | |
| 162 EVP_PKEY *pkey, const EVP_MD *md, | |
| 163 int flags) | |
| 164 { | |
| 165 PKCS7_SIGNER_INFO *si = NULL; | |
| 166 STACK_OF(X509_ALGOR) *smcap = NULL; | |
| 167 if(!X509_check_private_key(signcert, pkey)) | |
| 168 { | |
| 169 PKCS7err(PKCS7_F_PKCS7_SIGN_ADD_SIGNER, | |
| 170 PKCS7_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE); | |
| 171 return NULL; | |
| 172 } | |
| 173 | |
| 174 if (!(si = PKCS7_add_signature(p7,signcert,pkey, md))) | |
| 175 { | |
| 176 PKCS7err(PKCS7_F_PKCS7_SIGN_ADD_SIGNER, | |
| 177 PKCS7_R_PKCS7_ADD_SIGNATURE_ERROR); | |
| 178 return NULL; | |
| 179 } | |
| 180 | |
| 181 if(!(flags & PKCS7_NOCERTS)) | |
| 182 { | |
| 183 if (!PKCS7_add_certificate(p7, signcert)) | |
| 184 goto err; | |
| 185 } | |
| 186 | |
| 187 if(!(flags & PKCS7_NOATTR)) | |
| 188 { | |
| 189 if (!PKCS7_add_attrib_content_type(si, NULL)) | |
| 190 goto err; | |
| 191 /* Add SMIMECapabilities */ | |
| 192 if(!(flags & PKCS7_NOSMIMECAP)) | |
| 193 { | |
| 194 if(!(smcap = sk_X509_ALGOR_new_null())) | |
| 195 { | |
| 196 PKCS7err(PKCS7_F_PKCS7_SIGN_ADD_SIGNER, | |
| 197 ERR_R_MALLOC_FAILURE); | |
| 198 goto err; | |
| 199 } | |
| 200 if (!add_cipher_smcap(smcap, NID_aes_256_cbc, -1) | |
| 201 || !add_digest_smcap(smcap, NID_id_GostR3411_94, -1) | |
| 202 || !add_cipher_smcap(smcap, NID_id_Gost28147_89, -1) | |
| 203 || !add_cipher_smcap(smcap, NID_aes_192_cbc, -1) | |
| 204 || !add_cipher_smcap(smcap, NID_aes_128_cbc, -1) | |
| 205 || !add_cipher_smcap(smcap, NID_des_ede3_cbc, -1) | |
| 206 || !add_cipher_smcap(smcap, NID_rc2_cbc, 128) | |
| 207 || !add_cipher_smcap(smcap, NID_rc2_cbc, 64) | |
| 208 || !add_cipher_smcap(smcap, NID_des_cbc, -1) | |
| 209 || !add_cipher_smcap(smcap, NID_rc2_cbc, 40) | |
| 210 || !PKCS7_add_attrib_smimecap (si, smcap)) | |
| 211 goto err; | |
| 212 sk_X509_ALGOR_pop_free(smcap, X509_ALGOR_free); | |
| 213 smcap = NULL; | |
| 214 } | |
| 215 if (flags & PKCS7_REUSE_DIGEST) | |
| 216 { | |
| 217 if (!pkcs7_copy_existing_digest(p7, si)) | |
| 218 goto err; | |
| 219 if (!(flags & PKCS7_PARTIAL) && | |
| 220 !PKCS7_SIGNER_INFO_sign(si)) | |
| 221 goto err; | |
| 222 } | |
| 223 } | |
| 224 return si; | |
| 225 err: | |
| 226 if (smcap) | |
| 227 sk_X509_ALGOR_pop_free(smcap, X509_ALGOR_free); | |
| 228 return NULL; | |
| 229 } | |
| 230 | |
| 231 /* Search for a digest matching SignerInfo digest type and if found | |
| 232 * copy across. | |
| 233 */ | |
| 234 | |
| 235 static int pkcs7_copy_existing_digest(PKCS7 *p7, PKCS7_SIGNER_INFO *si) | |
| 236 { | |
| 237 int i; | |
| 238 STACK_OF(PKCS7_SIGNER_INFO) *sinfos; | |
| 239 PKCS7_SIGNER_INFO *sitmp; | |
| 240 ASN1_OCTET_STRING *osdig = NULL; | |
| 241 sinfos = PKCS7_get_signer_info(p7); | |
| 242 for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(sinfos); i++) | |
| 243 { | |
| 244 sitmp = sk_PKCS7_SIGNER_INFO_value(sinfos, i); | |
| 245 if (si == sitmp) | |
| 246 break; | |
| 247 if (sk_X509_ATTRIBUTE_num(sitmp->auth_attr) <= 0) | |
| 248 continue; | |
| 249 if (!OBJ_cmp(si->digest_alg->algorithm, | |
| 250 sitmp->digest_alg->algorithm)) | |
| 251 { | |
| 252 osdig = PKCS7_digest_from_attributes(sitmp->auth_attr); | |
| 253 break; | |
| 254 } | |
| 255 | |
| 256 } | |
| 257 | |
| 258 if (osdig) | |
| 259 return PKCS7_add1_attrib_digest(si, osdig->data, osdig->length); | |
| 260 | |
| 261 PKCS7err(PKCS7_F_PKCS7_COPY_EXISTING_DIGEST, | |
| 262 PKCS7_R_NO_MATCHING_DIGEST_TYPE_FOUND); | |
| 263 return 0; | |
| 264 } | |
| 265 | |
| 266 int PKCS7_verify(PKCS7 *p7, STACK_OF(X509) *certs, X509_STORE *store, | |
| 267 BIO *indata, BIO *out, int flags) | |
| 268 { | |
| 269 STACK_OF(X509) *signers; | |
| 270 X509 *signer; | |
| 271 STACK_OF(PKCS7_SIGNER_INFO) *sinfos; | |
| 272 PKCS7_SIGNER_INFO *si; | |
| 273 X509_STORE_CTX cert_ctx; | |
| 274 char buf[4096]; | |
| 275 int i, j=0, k, ret = 0; | |
| 276 BIO *p7bio; | |
| 277 BIO *tmpin, *tmpout; | |
| 278 | |
| 279 if(!p7) { | |
| 280 PKCS7err(PKCS7_F_PKCS7_VERIFY,PKCS7_R_INVALID_NULL_POINTER); | |
| 281 return 0; | |
| 282 } | |
| 283 | |
| 284 if(!PKCS7_type_is_signed(p7)) { | |
| 285 PKCS7err(PKCS7_F_PKCS7_VERIFY,PKCS7_R_WRONG_CONTENT_TYPE); | |
| 286 return 0; | |
| 287 } | |
| 288 | |
| 289 /* Check for no data and no content: no data to verify signature */ | |
| 290 if(PKCS7_get_detached(p7) && !indata) { | |
| 291 PKCS7err(PKCS7_F_PKCS7_VERIFY,PKCS7_R_NO_CONTENT); | |
| 292 return 0; | |
| 293 } | |
| 294 #if 0 | |
| 295 /* NB: this test commented out because some versions of Netscape | |
| 296 * illegally include zero length content when signing data. | |
| 297 */ | |
| 298 | |
| 299 /* Check for data and content: two sets of data */ | |
| 300 if(!PKCS7_get_detached(p7) && indata) { | |
| 301 PKCS7err(PKCS7_F_PKCS7_VERIFY,PKCS7_R_CONTENT_AN
D_DATA_PRESENT); | |
| 302 return 0; | |
| 303 } | |
| 304 #endif | |
| 305 | |
| 306 sinfos = PKCS7_get_signer_info(p7); | |
| 307 | |
| 308 if(!sinfos || !sk_PKCS7_SIGNER_INFO_num(sinfos)) { | |
| 309 PKCS7err(PKCS7_F_PKCS7_VERIFY,PKCS7_R_NO_SIGNATURES_ON_DATA); | |
| 310 return 0; | |
| 311 } | |
| 312 | |
| 313 | |
| 314 signers = PKCS7_get0_signers(p7, certs, flags); | |
| 315 | |
| 316 if(!signers) return 0; | |
| 317 | |
| 318 /* Now verify the certificates */ | |
| 319 | |
| 320 if (!(flags & PKCS7_NOVERIFY)) for (k = 0; k < sk_X509_num(signers); k++
) { | |
| 321 signer = sk_X509_value (signers, k); | |
| 322 if (!(flags & PKCS7_NOCHAIN)) { | |
| 323 if(!X509_STORE_CTX_init(&cert_ctx, store, signer, | |
| 324 p7->d.sign->cert)) | |
| 325 { | |
| 326 PKCS7err(PKCS7_F_PKCS7_VERIFY,ERR_R_X509_LIB); | |
| 327 sk_X509_free(signers); | |
| 328 return 0; | |
| 329 } | |
| 330 X509_STORE_CTX_set_default(&cert_ctx, "smime_sign"); | |
| 331 } else if(!X509_STORE_CTX_init (&cert_ctx, store, signer, NULL))
{ | |
| 332 PKCS7err(PKCS7_F_PKCS7_VERIFY,ERR_R_X509_LIB); | |
| 333 sk_X509_free(signers); | |
| 334 return 0; | |
| 335 } | |
| 336 if (!(flags & PKCS7_NOCRL)) | |
| 337 X509_STORE_CTX_set0_crls(&cert_ctx, p7->d.sign->crl); | |
| 338 i = X509_verify_cert(&cert_ctx); | |
| 339 if (i <= 0) j = X509_STORE_CTX_get_error(&cert_ctx); | |
| 340 X509_STORE_CTX_cleanup(&cert_ctx); | |
| 341 if (i <= 0) { | |
| 342 PKCS7err(PKCS7_F_PKCS7_VERIFY,PKCS7_R_CERTIFICATE_VERIFY
_ERROR); | |
| 343 ERR_add_error_data(2, "Verify error:", | |
| 344 X509_verify_cert_error_string(j)); | |
| 345 sk_X509_free(signers); | |
| 346 return 0; | |
| 347 } | |
| 348 /* Check for revocation status here */ | |
| 349 } | |
| 350 | |
| 351 /* Performance optimization: if the content is a memory BIO then | |
| 352 * store its contents in a temporary read only memory BIO. This | |
| 353 * avoids potentially large numbers of slow copies of data which will | |
| 354 * occur when reading from a read write memory BIO when signatures | |
| 355 * are calculated. | |
| 356 */ | |
| 357 | |
| 358 if (indata && (BIO_method_type(indata) == BIO_TYPE_MEM)) | |
| 359 { | |
| 360 char *ptr; | |
| 361 long len; | |
| 362 len = BIO_get_mem_data(indata, &ptr); | |
| 363 tmpin = BIO_new_mem_buf(ptr, len); | |
| 364 if (tmpin == NULL) | |
| 365 { | |
| 366 PKCS7err(PKCS7_F_PKCS7_VERIFY,ERR_R_MALLOC_FAILURE); | |
| 367 return 0; | |
| 368 } | |
| 369 } | |
| 370 else | |
| 371 tmpin = indata; | |
| 372 | |
| 373 | |
| 374 if (!(p7bio=PKCS7_dataInit(p7,tmpin))) | |
| 375 goto err; | |
| 376 | |
| 377 if(flags & PKCS7_TEXT) { | |
| 378 if(!(tmpout = BIO_new(BIO_s_mem()))) { | |
| 379 PKCS7err(PKCS7_F_PKCS7_VERIFY,ERR_R_MALLOC_FAILURE); | |
| 380 goto err; | |
| 381 } | |
| 382 BIO_set_mem_eof_return(tmpout, 0); | |
| 383 } else tmpout = out; | |
| 384 | |
| 385 /* We now have to 'read' from p7bio to calculate digests etc. */ | |
| 386 for (;;) | |
| 387 { | |
| 388 i=BIO_read(p7bio,buf,sizeof(buf)); | |
| 389 if (i <= 0) break; | |
| 390 if (tmpout) BIO_write(tmpout, buf, i); | |
| 391 } | |
| 392 | |
| 393 if(flags & PKCS7_TEXT) { | |
| 394 if(!SMIME_text(tmpout, out)) { | |
| 395 PKCS7err(PKCS7_F_PKCS7_VERIFY,PKCS7_R_SMIME_TEXT_ERROR); | |
| 396 BIO_free(tmpout); | |
| 397 goto err; | |
| 398 } | |
| 399 BIO_free(tmpout); | |
| 400 } | |
| 401 | |
| 402 /* Now Verify All Signatures */ | |
| 403 if (!(flags & PKCS7_NOSIGS)) | |
| 404 for (i=0; i<sk_PKCS7_SIGNER_INFO_num(sinfos); i++) | |
| 405 { | |
| 406 si=sk_PKCS7_SIGNER_INFO_value(sinfos,i); | |
| 407 signer = sk_X509_value (signers, i); | |
| 408 j=PKCS7_signatureVerify(p7bio,p7,si, signer); | |
| 409 if (j <= 0) { | |
| 410 PKCS7err(PKCS7_F_PKCS7_VERIFY,PKCS7_R_SIGNATURE_FAILURE)
; | |
| 411 goto err; | |
| 412 } | |
| 413 } | |
| 414 | |
| 415 ret = 1; | |
| 416 | |
| 417 err: | |
| 418 | |
| 419 if (tmpin == indata) | |
| 420 { | |
| 421 if (indata) BIO_pop(p7bio); | |
| 422 } | |
| 423 BIO_free_all(p7bio); | |
| 424 | |
| 425 sk_X509_free(signers); | |
| 426 | |
| 427 return ret; | |
| 428 } | |
| 429 | |
| 430 STACK_OF(X509) *PKCS7_get0_signers(PKCS7 *p7, STACK_OF(X509) *certs, int flags) | |
| 431 { | |
| 432 STACK_OF(X509) *signers; | |
| 433 STACK_OF(PKCS7_SIGNER_INFO) *sinfos; | |
| 434 PKCS7_SIGNER_INFO *si; | |
| 435 PKCS7_ISSUER_AND_SERIAL *ias; | |
| 436 X509 *signer; | |
| 437 int i; | |
| 438 | |
| 439 if(!p7) { | |
| 440 PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS,PKCS7_R_INVALID_NULL_POINTER
); | |
| 441 return NULL; | |
| 442 } | |
| 443 | |
| 444 if(!PKCS7_type_is_signed(p7)) { | |
| 445 PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS,PKCS7_R_WRONG_CONTENT_TYPE); | |
| 446 return NULL; | |
| 447 } | |
| 448 | |
| 449 /* Collect all the signers together */ | |
| 450 | |
| 451 sinfos = PKCS7_get_signer_info(p7); | |
| 452 | |
| 453 if(sk_PKCS7_SIGNER_INFO_num(sinfos) <= 0) { | |
| 454 PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS,PKCS7_R_NO_SIGNERS); | |
| 455 return 0; | |
| 456 } | |
| 457 | |
| 458 if(!(signers = sk_X509_new_null())) { | |
| 459 PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS,ERR_R_MALLOC_FAILURE); | |
| 460 return NULL; | |
| 461 } | |
| 462 | |
| 463 for (i = 0; i < sk_PKCS7_SIGNER_INFO_num(sinfos); i++) | |
| 464 { | |
| 465 si = sk_PKCS7_SIGNER_INFO_value(sinfos, i); | |
| 466 ias = si->issuer_and_serial; | |
| 467 signer = NULL; | |
| 468 /* If any certificates passed they take priority */ | |
| 469 if (certs) signer = X509_find_by_issuer_and_serial (certs, | |
| 470 ias->issuer, ias->serial); | |
| 471 if (!signer && !(flags & PKCS7_NOINTERN) | |
| 472 && p7->d.sign->cert) signer = | |
| 473 X509_find_by_issuer_and_serial (p7->d.sign->cert, | |
| 474 ias->issuer, ias->serial); | |
| 475 if (!signer) { | |
| 476 PKCS7err(PKCS7_F_PKCS7_GET0_SIGNERS,PKCS7_R_SIGNER_CERTI
FICATE_NOT_FOUND); | |
| 477 sk_X509_free(signers); | |
| 478 return 0; | |
| 479 } | |
| 480 | |
| 481 if (!sk_X509_push(signers, signer)) { | |
| 482 sk_X509_free(signers); | |
| 483 return NULL; | |
| 484 } | |
| 485 } | |
| 486 return signers; | |
| 487 } | |
| 488 | |
| 489 | |
| 490 /* Build a complete PKCS#7 enveloped data */ | |
| 491 | |
| 492 PKCS7 *PKCS7_encrypt(STACK_OF(X509) *certs, BIO *in, const EVP_CIPHER *cipher, | |
| 493 int flags) | |
| 494 { | |
| 495 PKCS7 *p7; | |
| 496 BIO *p7bio = NULL; | |
| 497 int i; | |
| 498 X509 *x509; | |
| 499 if(!(p7 = PKCS7_new())) { | |
| 500 PKCS7err(PKCS7_F_PKCS7_ENCRYPT,ERR_R_MALLOC_FAILURE); | |
| 501 return NULL; | |
| 502 } | |
| 503 | |
| 504 if (!PKCS7_set_type(p7, NID_pkcs7_enveloped)) | |
| 505 goto err; | |
| 506 if (!PKCS7_set_cipher(p7, cipher)) { | |
| 507 PKCS7err(PKCS7_F_PKCS7_ENCRYPT,PKCS7_R_ERROR_SETTING_CIPHER); | |
| 508 goto err; | |
| 509 } | |
| 510 | |
| 511 for(i = 0; i < sk_X509_num(certs); i++) { | |
| 512 x509 = sk_X509_value(certs, i); | |
| 513 if(!PKCS7_add_recipient(p7, x509)) { | |
| 514 PKCS7err(PKCS7_F_PKCS7_ENCRYPT, | |
| 515 PKCS7_R_ERROR_ADDING_RECIPIENT); | |
| 516 goto err; | |
| 517 } | |
| 518 } | |
| 519 | |
| 520 if (flags & PKCS7_STREAM) | |
| 521 return p7; | |
| 522 | |
| 523 if (PKCS7_final(p7, in, flags)) | |
| 524 return p7; | |
| 525 | |
| 526 err: | |
| 527 | |
| 528 BIO_free_all(p7bio); | |
| 529 PKCS7_free(p7); | |
| 530 return NULL; | |
| 531 | |
| 532 } | |
| 533 | |
| 534 int PKCS7_decrypt(PKCS7 *p7, EVP_PKEY *pkey, X509 *cert, BIO *data, int flags) | |
| 535 { | |
| 536 BIO *tmpmem; | |
| 537 int ret, i; | |
| 538 char buf[4096]; | |
| 539 | |
| 540 if(!p7) { | |
| 541 PKCS7err(PKCS7_F_PKCS7_DECRYPT,PKCS7_R_INVALID_NULL_POINTER); | |
| 542 return 0; | |
| 543 } | |
| 544 | |
| 545 if(!PKCS7_type_is_enveloped(p7)) { | |
| 546 PKCS7err(PKCS7_F_PKCS7_DECRYPT,PKCS7_R_WRONG_CONTENT_TYPE); | |
| 547 return 0; | |
| 548 } | |
| 549 | |
| 550 if(cert && !X509_check_private_key(cert, pkey)) { | |
| 551 PKCS7err(PKCS7_F_PKCS7_DECRYPT, | |
| 552 PKCS7_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE); | |
| 553 return 0; | |
| 554 } | |
| 555 | |
| 556 if(!(tmpmem = PKCS7_dataDecode(p7, pkey, NULL, cert))) { | |
| 557 PKCS7err(PKCS7_F_PKCS7_DECRYPT, PKCS7_R_DECRYPT_ERROR); | |
| 558 return 0; | |
| 559 } | |
| 560 | |
| 561 if (flags & PKCS7_TEXT) { | |
| 562 BIO *tmpbuf, *bread; | |
| 563 /* Encrypt BIOs can't do BIO_gets() so add a buffer BIO */ | |
| 564 if(!(tmpbuf = BIO_new(BIO_f_buffer()))) { | |
| 565 PKCS7err(PKCS7_F_PKCS7_DECRYPT, ERR_R_MALLOC_FAILURE); | |
| 566 BIO_free_all(tmpmem); | |
| 567 return 0; | |
| 568 } | |
| 569 if(!(bread = BIO_push(tmpbuf, tmpmem))) { | |
| 570 PKCS7err(PKCS7_F_PKCS7_DECRYPT, ERR_R_MALLOC_FAILURE); | |
| 571 BIO_free_all(tmpbuf); | |
| 572 BIO_free_all(tmpmem); | |
| 573 return 0; | |
| 574 } | |
| 575 ret = SMIME_text(bread, data); | |
| 576 if (ret > 0 && BIO_method_type(tmpmem) == BIO_TYPE_CIPHER) | |
| 577 { | |
| 578 if (!BIO_get_cipher_status(tmpmem)) | |
| 579 ret = 0; | |
| 580 } | |
| 581 BIO_free_all(bread); | |
| 582 return ret; | |
| 583 } else { | |
| 584 for(;;) { | |
| 585 i = BIO_read(tmpmem, buf, sizeof(buf)); | |
| 586 if(i <= 0) | |
| 587 { | |
| 588 ret = 1; | |
| 589 if (BIO_method_type(tmpmem) == BIO_TYPE_CIPHER) | |
| 590 { | |
| 591 if (!BIO_get_cipher_status(tmpmem)) | |
| 592 ret = 0; | |
| 593 } | |
| 594 | |
| 595 break; | |
| 596 } | |
| 597 if (BIO_write(data, buf, i) != i) | |
| 598 { | |
| 599 ret = 0; | |
| 600 break; | |
| 601 } | |
| 602 } | |
| 603 BIO_free_all(tmpmem); | |
| 604 return ret; | |
| 605 } | |
| 606 } | |
| OLD | NEW |
|---|
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