1 /* crypto/cms/cms_sd.c */ 2 /* Written by Dr Stephen N Henson (steve (at) openssl.org) for the OpenSSL 3 * project. 4 */ 5 /* ==================================================================== 6 * Copyright (c) 2008 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 (at) 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 54 #include "cryptlib.h" 55 #include <openssl/asn1t.h> 56 #include <openssl/pem.h> 57 #include <openssl/x509v3.h> 58 #include <openssl/err.h> 59 #include <openssl/cms.h> 60 #include "cms_lcl.h" 61 #include "asn1_locl.h" 62 63 /* CMS SignedData Utilities */ 64 65 DECLARE_ASN1_ITEM(CMS_SignedData) 66 67 static CMS_SignedData *cms_get0_signed(CMS_ContentInfo *cms) 68 { 69 if (OBJ_obj2nid(cms->contentType) != NID_pkcs7_signed) 70 { 71 CMSerr(CMS_F_CMS_GET0_SIGNED, CMS_R_CONTENT_TYPE_NOT_SIGNED_DATA); 72 return NULL; 73 } 74 return cms->d.signedData; 75 } 76 77 static CMS_SignedData *cms_signed_data_init(CMS_ContentInfo *cms) 78 { 79 if (cms->d.other == NULL) 80 { 81 cms->d.signedData = M_ASN1_new_of(CMS_SignedData); 82 if (!cms->d.signedData) 83 { 84 CMSerr(CMS_F_CMS_SIGNED_DATA_INIT, ERR_R_MALLOC_FAILURE); 85 return NULL; 86 } 87 cms->d.signedData->version = 1; 88 cms->d.signedData->encapContentInfo->eContentType = 89 OBJ_nid2obj(NID_pkcs7_data); 90 cms->d.signedData->encapContentInfo->partial = 1; 91 ASN1_OBJECT_free(cms->contentType); 92 cms->contentType = OBJ_nid2obj(NID_pkcs7_signed); 93 return cms->d.signedData; 94 } 95 return cms_get0_signed(cms); 96 } 97 98 /* Just initialize SignedData e.g. for certs only structure */ 99 100 int CMS_SignedData_init(CMS_ContentInfo *cms) 101 { 102 if (cms_signed_data_init(cms)) 103 return 1; 104 else 105 return 0; 106 } 107 108 /* Check structures and fixup version numbers (if necessary) */ 109 110 static void cms_sd_set_version(CMS_SignedData *sd) 111 { 112 int i; 113 CMS_CertificateChoices *cch; 114 CMS_RevocationInfoChoice *rch; 115 CMS_SignerInfo *si; 116 117 for (i = 0; i < sk_CMS_CertificateChoices_num(sd->certificates); i++) 118 { 119 cch = sk_CMS_CertificateChoices_value(sd->certificates, i); 120 if (cch->type == CMS_CERTCHOICE_OTHER) 121 { 122 if (sd->version < 5) 123 sd->version = 5; 124 } 125 else if (cch->type == CMS_CERTCHOICE_V2ACERT) 126 { 127 if (sd->version < 4) 128 sd->version = 4; 129 } 130 else if (cch->type == CMS_CERTCHOICE_V1ACERT) 131 { 132 if (sd->version < 3) 133 sd->version = 3; 134 } 135 } 136 137 for (i = 0; i < sk_CMS_RevocationInfoChoice_num(sd->crls); i++) 138 { 139 rch = sk_CMS_RevocationInfoChoice_value(sd->crls, i); 140 if (rch->type == CMS_REVCHOICE_OTHER) 141 { 142 if (sd->version < 5) 143 sd->version = 5; 144 } 145 } 146 147 if ((OBJ_obj2nid(sd->encapContentInfo->eContentType) != NID_pkcs7_data) 148 && (sd->version < 3)) 149 sd->version = 3; 150 151 for (i = 0; i < sk_CMS_SignerInfo_num(sd->signerInfos); i++) 152 { 153 si = sk_CMS_SignerInfo_value(sd->signerInfos, i); 154 if (si->sid->type == CMS_SIGNERINFO_KEYIDENTIFIER) 155 { 156 if (si->version < 3) 157 si->version = 3; 158 if (sd->version < 3) 159 sd->version = 3; 160 } 161 else if (si->version < 1) 162 si->version = 1; 163 } 164 165 if (sd->version < 1) 166 sd->version = 1; 167 168 } 169 170 /* Copy an existing messageDigest value */ 171 172 static int cms_copy_messageDigest(CMS_ContentInfo *cms, CMS_SignerInfo *si) 173 { 174 STACK_OF(CMS_SignerInfo) *sinfos; 175 CMS_SignerInfo *sitmp; 176 int i; 177 sinfos = CMS_get0_SignerInfos(cms); 178 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) 179 { 180 ASN1_OCTET_STRING *messageDigest; 181 sitmp = sk_CMS_SignerInfo_value(sinfos, i); 182 if (sitmp == si) 183 continue; 184 if (CMS_signed_get_attr_count(sitmp) < 0) 185 continue; 186 if (OBJ_cmp(si->digestAlgorithm->algorithm, 187 sitmp->digestAlgorithm->algorithm)) 188 continue; 189 messageDigest = CMS_signed_get0_data_by_OBJ(sitmp, 190 OBJ_nid2obj(NID_pkcs9_messageDigest), 191 -3, V_ASN1_OCTET_STRING); 192 if (!messageDigest) 193 { 194 CMSerr(CMS_F_CMS_COPY_MESSAGEDIGEST, 195 CMS_R_ERROR_READING_MESSAGEDIGEST_ATTRIBUTE); 196 return 0; 197 } 198 199 if (CMS_signed_add1_attr_by_NID(si, NID_pkcs9_messageDigest, 200 V_ASN1_OCTET_STRING, 201 messageDigest, -1)) 202 return 1; 203 else 204 return 0; 205 } 206 CMSerr(CMS_F_CMS_COPY_MESSAGEDIGEST, CMS_R_NO_MATCHING_DIGEST); 207 return 0; 208 } 209 210 int cms_set1_SignerIdentifier(CMS_SignerIdentifier *sid, X509 *cert, int type) 211 { 212 switch(type) 213 { 214 case CMS_SIGNERINFO_ISSUER_SERIAL: 215 sid->d.issuerAndSerialNumber = 216 M_ASN1_new_of(CMS_IssuerAndSerialNumber); 217 if (!sid->d.issuerAndSerialNumber) 218 goto merr; 219 if (!X509_NAME_set(&sid->d.issuerAndSerialNumber->issuer, 220 X509_get_issuer_name(cert))) 221 goto merr; 222 if (!ASN1_STRING_copy( 223 sid->d.issuerAndSerialNumber->serialNumber, 224 X509_get_serialNumber(cert))) 225 goto merr; 226 break; 227 228 case CMS_SIGNERINFO_KEYIDENTIFIER: 229 if (!cert->skid) 230 { 231 CMSerr(CMS_F_CMS_SET1_SIGNERIDENTIFIER, 232 CMS_R_CERTIFICATE_HAS_NO_KEYID); 233 return 0; 234 } 235 sid->d.subjectKeyIdentifier = ASN1_STRING_dup(cert->skid); 236 if (!sid->d.subjectKeyIdentifier) 237 goto merr; 238 break; 239 240 default: 241 CMSerr(CMS_F_CMS_SET1_SIGNERIDENTIFIER, CMS_R_UNKNOWN_ID); 242 return 0; 243 } 244 245 sid->type = type; 246 247 return 1; 248 249 merr: 250 CMSerr(CMS_F_CMS_SET1_SIGNERIDENTIFIER, ERR_R_MALLOC_FAILURE); 251 return 0; 252 253 } 254 255 int cms_SignerIdentifier_get0_signer_id(CMS_SignerIdentifier *sid, 256 ASN1_OCTET_STRING **keyid, 257 X509_NAME **issuer, ASN1_INTEGER **sno) 258 { 259 if (sid->type == CMS_SIGNERINFO_ISSUER_SERIAL) 260 { 261 if (issuer) 262 *issuer = sid->d.issuerAndSerialNumber->issuer; 263 if (sno) 264 *sno = sid->d.issuerAndSerialNumber->serialNumber; 265 } 266 else if (sid->type == CMS_SIGNERINFO_KEYIDENTIFIER) 267 { 268 if (keyid) 269 *keyid = sid->d.subjectKeyIdentifier; 270 } 271 else 272 return 0; 273 return 1; 274 } 275 276 int cms_SignerIdentifier_cert_cmp(CMS_SignerIdentifier *sid, X509 *cert) 277 { 278 int ret; 279 if (sid->type == CMS_SIGNERINFO_ISSUER_SERIAL) 280 { 281 ret = X509_NAME_cmp(sid->d.issuerAndSerialNumber->issuer, 282 X509_get_issuer_name(cert)); 283 if (ret) 284 return ret; 285 return ASN1_INTEGER_cmp(sid->d.issuerAndSerialNumber->serialNumber, 286 X509_get_serialNumber(cert)); 287 } 288 else if (sid->type == CMS_SIGNERINFO_KEYIDENTIFIER) 289 { 290 X509_check_purpose(cert, -1, -1); 291 if (!cert->skid) 292 return -1; 293 return ASN1_OCTET_STRING_cmp(sid->d.subjectKeyIdentifier, 294 cert->skid); 295 } 296 else 297 return -1; 298 } 299 300 CMS_SignerInfo *CMS_add1_signer(CMS_ContentInfo *cms, 301 X509 *signer, EVP_PKEY *pk, const EVP_MD *md, 302 unsigned int flags) 303 { 304 CMS_SignedData *sd; 305 CMS_SignerInfo *si = NULL; 306 X509_ALGOR *alg; 307 int i, type; 308 if(!X509_check_private_key(signer, pk)) 309 { 310 CMSerr(CMS_F_CMS_ADD1_SIGNER, 311 CMS_R_PRIVATE_KEY_DOES_NOT_MATCH_CERTIFICATE); 312 return NULL; 313 } 314 sd = cms_signed_data_init(cms); 315 if (!sd) 316 goto err; 317 si = M_ASN1_new_of(CMS_SignerInfo); 318 if (!si) 319 goto merr; 320 X509_check_purpose(signer, -1, -1); 321 322 CRYPTO_add(&pk->references, 1, CRYPTO_LOCK_EVP_PKEY); 323 CRYPTO_add(&signer->references, 1, CRYPTO_LOCK_X509); 324 325 si->pkey = pk; 326 si->signer = signer; 327 328 if (flags & CMS_USE_KEYID) 329 { 330 si->version = 3; 331 if (sd->version < 3) 332 sd->version = 3; 333 type = CMS_SIGNERINFO_KEYIDENTIFIER; 334 } 335 else 336 { 337 type = CMS_SIGNERINFO_ISSUER_SERIAL; 338 si->version = 1; 339 } 340 341 if (!cms_set1_SignerIdentifier(si->sid, signer, type)) 342 goto err; 343 344 if (md == NULL) 345 { 346 int def_nid; 347 if (EVP_PKEY_get_default_digest_nid(pk, &def_nid) <= 0) 348 goto err; 349 md = EVP_get_digestbynid(def_nid); 350 if (md == NULL) 351 { 352 CMSerr(CMS_F_CMS_ADD1_SIGNER, CMS_R_NO_DEFAULT_DIGEST); 353 goto err; 354 } 355 } 356 357 if (!md) 358 { 359 CMSerr(CMS_F_CMS_ADD1_SIGNER, CMS_R_NO_DIGEST_SET); 360 goto err; 361 } 362 363 cms_DigestAlgorithm_set(si->digestAlgorithm, md); 364 365 /* See if digest is present in digestAlgorithms */ 366 for (i = 0; i < sk_X509_ALGOR_num(sd->digestAlgorithms); i++) 367 { 368 ASN1_OBJECT *aoid; 369 alg = sk_X509_ALGOR_value(sd->digestAlgorithms, i); 370 X509_ALGOR_get0(&aoid, NULL, NULL, alg); 371 if (OBJ_obj2nid(aoid) == EVP_MD_type(md)) 372 break; 373 } 374 375 if (i == sk_X509_ALGOR_num(sd->digestAlgorithms)) 376 { 377 alg = X509_ALGOR_new(); 378 if (!alg) 379 goto merr; 380 cms_DigestAlgorithm_set(alg, md); 381 if (!sk_X509_ALGOR_push(sd->digestAlgorithms, alg)) 382 { 383 X509_ALGOR_free(alg); 384 goto merr; 385 } 386 } 387 388 if (pk->ameth && pk->ameth->pkey_ctrl) 389 { 390 i = pk->ameth->pkey_ctrl(pk, ASN1_PKEY_CTRL_CMS_SIGN, 391 0, si); 392 if (i == -2) 393 { 394 CMSerr(CMS_F_CMS_ADD1_SIGNER, 395 CMS_R_NOT_SUPPORTED_FOR_THIS_KEY_TYPE); 396 goto err; 397 } 398 if (i <= 0) 399 { 400 CMSerr(CMS_F_CMS_ADD1_SIGNER, CMS_R_CTRL_FAILURE); 401 goto err; 402 } 403 } 404 405 if (!(flags & CMS_NOATTR)) 406 { 407 /* Initialialize signed attributes strutucture so other 408 * attributes such as signing time etc are added later 409 * even if we add none here. 410 */ 411 if (!si->signedAttrs) 412 { 413 si->signedAttrs = sk_X509_ATTRIBUTE_new_null(); 414 if (!si->signedAttrs) 415 goto merr; 416 } 417 418 if (!(flags & CMS_NOSMIMECAP)) 419 { 420 STACK_OF(X509_ALGOR) *smcap = NULL; 421 i = CMS_add_standard_smimecap(&smcap); 422 if (i) 423 i = CMS_add_smimecap(si, smcap); 424 sk_X509_ALGOR_pop_free(smcap, X509_ALGOR_free); 425 if (!i) 426 goto merr; 427 } 428 if (flags & CMS_REUSE_DIGEST) 429 { 430 if (!cms_copy_messageDigest(cms, si)) 431 goto err; 432 if (!(flags & CMS_PARTIAL) && 433 !CMS_SignerInfo_sign(si)) 434 goto err; 435 } 436 } 437 438 if (!(flags & CMS_NOCERTS)) 439 { 440 /* NB ignore -1 return for duplicate cert */ 441 if (!CMS_add1_cert(cms, signer)) 442 goto merr; 443 } 444 445 if (!sd->signerInfos) 446 sd->signerInfos = sk_CMS_SignerInfo_new_null(); 447 if (!sd->signerInfos || 448 !sk_CMS_SignerInfo_push(sd->signerInfos, si)) 449 goto merr; 450 451 return si; 452 453 merr: 454 CMSerr(CMS_F_CMS_ADD1_SIGNER, ERR_R_MALLOC_FAILURE); 455 err: 456 if (si) 457 M_ASN1_free_of(si, CMS_SignerInfo); 458 return NULL; 459 460 } 461 462 static int cms_add1_signingTime(CMS_SignerInfo *si, ASN1_TIME *t) 463 { 464 ASN1_TIME *tt; 465 int r = 0; 466 if (t) 467 tt = t; 468 else 469 tt = X509_gmtime_adj(NULL, 0); 470 471 if (!tt) 472 goto merr; 473 474 if (CMS_signed_add1_attr_by_NID(si, NID_pkcs9_signingTime, 475 tt->type, tt, -1) <= 0) 476 goto merr; 477 478 r = 1; 479 480 merr: 481 482 if (!t) 483 ASN1_TIME_free(tt); 484 485 if (!r) 486 CMSerr(CMS_F_CMS_ADD1_SIGNINGTIME, ERR_R_MALLOC_FAILURE); 487 488 return r; 489 490 } 491 492 STACK_OF(CMS_SignerInfo) *CMS_get0_SignerInfos(CMS_ContentInfo *cms) 493 { 494 CMS_SignedData *sd; 495 sd = cms_get0_signed(cms); 496 if (!sd) 497 return NULL; 498 return sd->signerInfos; 499 } 500 501 STACK_OF(X509) *CMS_get0_signers(CMS_ContentInfo *cms) 502 { 503 STACK_OF(X509) *signers = NULL; 504 STACK_OF(CMS_SignerInfo) *sinfos; 505 CMS_SignerInfo *si; 506 int i; 507 sinfos = CMS_get0_SignerInfos(cms); 508 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) 509 { 510 si = sk_CMS_SignerInfo_value(sinfos, i); 511 if (si->signer) 512 { 513 if (!signers) 514 { 515 signers = sk_X509_new_null(); 516 if (!signers) 517 return NULL; 518 } 519 if (!sk_X509_push(signers, si->signer)) 520 { 521 sk_X509_free(signers); 522 return NULL; 523 } 524 } 525 } 526 return signers; 527 } 528 529 void CMS_SignerInfo_set1_signer_cert(CMS_SignerInfo *si, X509 *signer) 530 { 531 if (signer) 532 { 533 CRYPTO_add(&signer->references, 1, CRYPTO_LOCK_X509); 534 if (si->pkey) 535 EVP_PKEY_free(si->pkey); 536 si->pkey = X509_get_pubkey(signer); 537 } 538 if (si->signer) 539 X509_free(si->signer); 540 si->signer = signer; 541 } 542 543 int CMS_SignerInfo_get0_signer_id(CMS_SignerInfo *si, 544 ASN1_OCTET_STRING **keyid, 545 X509_NAME **issuer, ASN1_INTEGER **sno) 546 { 547 return cms_SignerIdentifier_get0_signer_id(si->sid, keyid, issuer, sno); 548 } 549 550 int CMS_SignerInfo_cert_cmp(CMS_SignerInfo *si, X509 *cert) 551 { 552 return cms_SignerIdentifier_cert_cmp(si->sid, cert); 553 } 554 555 int CMS_set1_signers_certs(CMS_ContentInfo *cms, STACK_OF(X509) *scerts, 556 unsigned int flags) 557 { 558 CMS_SignedData *sd; 559 CMS_SignerInfo *si; 560 CMS_CertificateChoices *cch; 561 STACK_OF(CMS_CertificateChoices) *certs; 562 X509 *x; 563 int i, j; 564 int ret = 0; 565 sd = cms_get0_signed(cms); 566 if (!sd) 567 return -1; 568 certs = sd->certificates; 569 for (i = 0; i < sk_CMS_SignerInfo_num(sd->signerInfos); i++) 570 { 571 si = sk_CMS_SignerInfo_value(sd->signerInfos, i); 572 if (si->signer) 573 continue; 574 575 for (j = 0; j < sk_X509_num(scerts); j++) 576 { 577 x = sk_X509_value(scerts, j); 578 if (CMS_SignerInfo_cert_cmp(si, x) == 0) 579 { 580 CMS_SignerInfo_set1_signer_cert(si, x); 581 ret++; 582 break; 583 } 584 } 585 586 if (si->signer || (flags & CMS_NOINTERN)) 587 continue; 588 589 for (j = 0; j < sk_CMS_CertificateChoices_num(certs); j++) 590 { 591 cch = sk_CMS_CertificateChoices_value(certs, j); 592 if (cch->type != 0) 593 continue; 594 x = cch->d.certificate; 595 if (CMS_SignerInfo_cert_cmp(si, x) == 0) 596 { 597 CMS_SignerInfo_set1_signer_cert(si, x); 598 ret++; 599 break; 600 } 601 } 602 } 603 return ret; 604 } 605 606 void CMS_SignerInfo_get0_algs(CMS_SignerInfo *si, EVP_PKEY **pk, X509 **signer, 607 X509_ALGOR **pdig, X509_ALGOR **psig) 608 { 609 if (pk) 610 *pk = si->pkey; 611 if (signer) 612 *signer = si->signer; 613 if (pdig) 614 *pdig = si->digestAlgorithm; 615 if (psig) 616 *psig = si->signatureAlgorithm; 617 } 618 619 static int cms_SignerInfo_content_sign(CMS_ContentInfo *cms, 620 CMS_SignerInfo *si, BIO *chain) 621 { 622 EVP_MD_CTX mctx; 623 int r = 0; 624 EVP_MD_CTX_init(&mctx); 625 626 627 if (!si->pkey) 628 { 629 CMSerr(CMS_F_CMS_SIGNERINFO_CONTENT_SIGN, CMS_R_NO_PRIVATE_KEY); 630 return 0; 631 } 632 633 if (!cms_DigestAlgorithm_find_ctx(&mctx, chain, si->digestAlgorithm)) 634 goto err; 635 636 /* If any signed attributes calculate and add messageDigest attribute */ 637 638 if (CMS_signed_get_attr_count(si) >= 0) 639 { 640 ASN1_OBJECT *ctype = 641 cms->d.signedData->encapContentInfo->eContentType; 642 unsigned char md[EVP_MAX_MD_SIZE]; 643 unsigned int mdlen; 644 if (!EVP_DigestFinal_ex(&mctx, md, &mdlen)) 645 goto err; 646 if (!CMS_signed_add1_attr_by_NID(si, NID_pkcs9_messageDigest, 647 V_ASN1_OCTET_STRING, 648 md, mdlen)) 649 goto err; 650 /* Copy content type across */ 651 if (CMS_signed_add1_attr_by_NID(si, NID_pkcs9_contentType, 652 V_ASN1_OBJECT, ctype, -1) <= 0) 653 goto err; 654 if (!CMS_SignerInfo_sign(si)) 655 goto err; 656 } 657 else 658 { 659 unsigned char *sig; 660 unsigned int siglen; 661 sig = OPENSSL_malloc(EVP_PKEY_size(si->pkey)); 662 if (!sig) 663 { 664 CMSerr(CMS_F_CMS_SIGNERINFO_CONTENT_SIGN, 665 ERR_R_MALLOC_FAILURE); 666 goto err; 667 } 668 if (!EVP_SignFinal(&mctx, sig, &siglen, si->pkey)) 669 { 670 CMSerr(CMS_F_CMS_SIGNERINFO_CONTENT_SIGN, 671 CMS_R_SIGNFINAL_ERROR); 672 OPENSSL_free(sig); 673 goto err; 674 } 675 ASN1_STRING_set0(si->signature, sig, siglen); 676 } 677 678 r = 1; 679 680 err: 681 EVP_MD_CTX_cleanup(&mctx); 682 return r; 683 684 } 685 686 int cms_SignedData_final(CMS_ContentInfo *cms, BIO *chain) 687 { 688 STACK_OF(CMS_SignerInfo) *sinfos; 689 CMS_SignerInfo *si; 690 int i; 691 sinfos = CMS_get0_SignerInfos(cms); 692 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) 693 { 694 si = sk_CMS_SignerInfo_value(sinfos, i); 695 if (!cms_SignerInfo_content_sign(cms, si, chain)) 696 return 0; 697 } 698 cms->d.signedData->encapContentInfo->partial = 0; 699 return 1; 700 } 701 702 int CMS_SignerInfo_sign(CMS_SignerInfo *si) 703 { 704 EVP_MD_CTX mctx; 705 EVP_PKEY_CTX *pctx; 706 unsigned char *abuf = NULL; 707 int alen; 708 size_t siglen; 709 const EVP_MD *md = NULL; 710 711 md = EVP_get_digestbyobj(si->digestAlgorithm->algorithm); 712 if (md == NULL) 713 return 0; 714 715 EVP_MD_CTX_init(&mctx); 716 717 if (CMS_signed_get_attr_by_NID(si, NID_pkcs9_signingTime, -1) < 0) 718 { 719 if (!cms_add1_signingTime(si, NULL)) 720 goto err; 721 } 722 723 if (EVP_DigestSignInit(&mctx, &pctx, md, NULL, si->pkey) <= 0) 724 goto err; 725 726 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN, 727 EVP_PKEY_CTRL_CMS_SIGN, 0, si) <= 0) 728 { 729 CMSerr(CMS_F_CMS_SIGNERINFO_SIGN, CMS_R_CTRL_ERROR); 730 goto err; 731 } 732 733 alen = ASN1_item_i2d((ASN1_VALUE *)si->signedAttrs,&abuf, 734 ASN1_ITEM_rptr(CMS_Attributes_Sign)); 735 if(!abuf) 736 goto err; 737 if (EVP_DigestSignUpdate(&mctx, abuf, alen) <= 0) 738 goto err; 739 if (EVP_DigestSignFinal(&mctx, NULL, &siglen) <= 0) 740 goto err; 741 OPENSSL_free(abuf); 742 abuf = OPENSSL_malloc(siglen); 743 if(!abuf) 744 goto err; 745 if (EVP_DigestSignFinal(&mctx, abuf, &siglen) <= 0) 746 goto err; 747 748 if (EVP_PKEY_CTX_ctrl(pctx, -1, EVP_PKEY_OP_SIGN, 749 EVP_PKEY_CTRL_CMS_SIGN, 1, si) <= 0) 750 { 751 CMSerr(CMS_F_CMS_SIGNERINFO_SIGN, CMS_R_CTRL_ERROR); 752 goto err; 753 } 754 755 EVP_MD_CTX_cleanup(&mctx); 756 757 ASN1_STRING_set0(si->signature, abuf, siglen); 758 759 return 1; 760 761 err: 762 if (abuf) 763 OPENSSL_free(abuf); 764 EVP_MD_CTX_cleanup(&mctx); 765 return 0; 766 767 } 768 769 int CMS_SignerInfo_verify(CMS_SignerInfo *si) 770 { 771 EVP_MD_CTX mctx; 772 EVP_PKEY_CTX *pctx; 773 unsigned char *abuf = NULL; 774 int alen, r = -1; 775 const EVP_MD *md = NULL; 776 777 if (!si->pkey) 778 { 779 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY, CMS_R_NO_PUBLIC_KEY); 780 return -1; 781 } 782 783 md = EVP_get_digestbyobj(si->digestAlgorithm->algorithm); 784 if (md == NULL) 785 return -1; 786 EVP_MD_CTX_init(&mctx); 787 if (EVP_DigestVerifyInit(&mctx, &pctx, md, NULL, si->pkey) <= 0) 788 goto err; 789 790 alen = ASN1_item_i2d((ASN1_VALUE *)si->signedAttrs,&abuf, 791 ASN1_ITEM_rptr(CMS_Attributes_Verify)); 792 if(!abuf) 793 goto err; 794 r = EVP_DigestVerifyUpdate(&mctx, abuf, alen); 795 OPENSSL_free(abuf); 796 if (r <= 0) 797 { 798 r = -1; 799 goto err; 800 } 801 r = EVP_DigestVerifyFinal(&mctx, 802 si->signature->data, si->signature->length); 803 if (r <= 0) 804 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY, CMS_R_VERIFICATION_FAILURE); 805 err: 806 EVP_MD_CTX_cleanup(&mctx); 807 return r; 808 } 809 810 /* Create a chain of digest BIOs from a CMS ContentInfo */ 811 812 BIO *cms_SignedData_init_bio(CMS_ContentInfo *cms) 813 { 814 int i; 815 CMS_SignedData *sd; 816 BIO *chain = NULL; 817 sd = cms_get0_signed(cms); 818 if (!sd) 819 return NULL; 820 if (cms->d.signedData->encapContentInfo->partial) 821 cms_sd_set_version(sd); 822 for (i = 0; i < sk_X509_ALGOR_num(sd->digestAlgorithms); i++) 823 { 824 X509_ALGOR *digestAlgorithm; 825 BIO *mdbio; 826 digestAlgorithm = sk_X509_ALGOR_value(sd->digestAlgorithms, i); 827 mdbio = cms_DigestAlgorithm_init_bio(digestAlgorithm); 828 if (!mdbio) 829 goto err; 830 if (chain) 831 BIO_push(chain, mdbio); 832 else 833 chain = mdbio; 834 } 835 return chain; 836 err: 837 if (chain) 838 BIO_free_all(chain); 839 return NULL; 840 } 841 842 int CMS_SignerInfo_verify_content(CMS_SignerInfo *si, BIO *chain) 843 { 844 ASN1_OCTET_STRING *os = NULL; 845 EVP_MD_CTX mctx; 846 int r = -1; 847 EVP_MD_CTX_init(&mctx); 848 /* If we have any signed attributes look for messageDigest value */ 849 if (CMS_signed_get_attr_count(si) >= 0) 850 { 851 os = CMS_signed_get0_data_by_OBJ(si, 852 OBJ_nid2obj(NID_pkcs9_messageDigest), 853 -3, V_ASN1_OCTET_STRING); 854 if (!os) 855 { 856 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT, 857 CMS_R_ERROR_READING_MESSAGEDIGEST_ATTRIBUTE); 858 goto err; 859 } 860 } 861 862 if (!cms_DigestAlgorithm_find_ctx(&mctx, chain, si->digestAlgorithm)) 863 goto err; 864 865 /* If messageDigest found compare it */ 866 867 if (os) 868 { 869 unsigned char mval[EVP_MAX_MD_SIZE]; 870 unsigned int mlen; 871 if (EVP_DigestFinal_ex(&mctx, mval, &mlen) <= 0) 872 { 873 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT, 874 CMS_R_UNABLE_TO_FINALIZE_CONTEXT); 875 goto err; 876 } 877 if (mlen != (unsigned int)os->length) 878 { 879 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT, 880 CMS_R_MESSAGEDIGEST_ATTRIBUTE_WRONG_LENGTH); 881 goto err; 882 } 883 884 if (memcmp(mval, os->data, mlen)) 885 { 886 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT, 887 CMS_R_VERIFICATION_FAILURE); 888 r = 0; 889 } 890 else 891 r = 1; 892 } 893 else 894 { 895 r = EVP_VerifyFinal(&mctx, si->signature->data, 896 si->signature->length, si->pkey); 897 if (r <= 0) 898 { 899 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CONTENT, 900 CMS_R_VERIFICATION_FAILURE); 901 r = 0; 902 } 903 } 904 905 err: 906 EVP_MD_CTX_cleanup(&mctx); 907 return r; 908 909 } 910 911 int CMS_add_smimecap(CMS_SignerInfo *si, STACK_OF(X509_ALGOR) *algs) 912 { 913 unsigned char *smder = NULL; 914 int smderlen, r; 915 smderlen = i2d_X509_ALGORS(algs, &smder); 916 if (smderlen <= 0) 917 return 0; 918 r = CMS_signed_add1_attr_by_NID(si, NID_SMIMECapabilities, 919 V_ASN1_SEQUENCE, smder, smderlen); 920 OPENSSL_free(smder); 921 return r; 922 } 923 924 int CMS_add_simple_smimecap(STACK_OF(X509_ALGOR) **algs, 925 int algnid, int keysize) 926 { 927 X509_ALGOR *alg; 928 ASN1_INTEGER *key = NULL; 929 if (keysize > 0) 930 { 931 key = ASN1_INTEGER_new(); 932 if (!key || !ASN1_INTEGER_set(key, keysize)) 933 return 0; 934 } 935 alg = X509_ALGOR_new(); 936 if (!alg) 937 { 938 if (key) 939 ASN1_INTEGER_free(key); 940 return 0; 941 } 942 943 X509_ALGOR_set0(alg, OBJ_nid2obj(algnid), 944 key ? V_ASN1_INTEGER : V_ASN1_UNDEF, key); 945 if (!*algs) 946 *algs = sk_X509_ALGOR_new_null(); 947 if (!*algs || !sk_X509_ALGOR_push(*algs, alg)) 948 { 949 X509_ALGOR_free(alg); 950 return 0; 951 } 952 return 1; 953 } 954 955 /* Check to see if a cipher exists and if so add S/MIME capabilities */ 956 957 static int cms_add_cipher_smcap(STACK_OF(X509_ALGOR) **sk, int nid, int arg) 958 { 959 if (EVP_get_cipherbynid(nid)) 960 return CMS_add_simple_smimecap(sk, nid, arg); 961 return 1; 962 } 963 964 static int cms_add_digest_smcap(STACK_OF(X509_ALGOR) **sk, int nid, int arg) 965 { 966 if (EVP_get_digestbynid(nid)) 967 return CMS_add_simple_smimecap(sk, nid, arg); 968 return 1; 969 } 970 971 int CMS_add_standard_smimecap(STACK_OF(X509_ALGOR) **smcap) 972 { 973 if (!cms_add_cipher_smcap(smcap, NID_aes_256_cbc, -1) 974 || !cms_add_digest_smcap(smcap, NID_id_GostR3411_94, -1) 975 || !cms_add_cipher_smcap(smcap, NID_id_Gost28147_89, -1) 976 || !cms_add_cipher_smcap(smcap, NID_aes_192_cbc, -1) 977 || !cms_add_cipher_smcap(smcap, NID_aes_128_cbc, -1) 978 || !cms_add_cipher_smcap(smcap, NID_des_ede3_cbc, -1) 979 || !cms_add_cipher_smcap(smcap, NID_rc2_cbc, 128) 980 || !cms_add_cipher_smcap(smcap, NID_rc2_cbc, 64) 981 || !cms_add_cipher_smcap(smcap, NID_des_cbc, -1) 982 || !cms_add_cipher_smcap(smcap, NID_rc2_cbc, 40)) 983 return 0; 984 return 1; 985 } 986
