1 /* $OpenBSD: pk7_lib.c,v 1.23 2021/12/12 21:30:14 tb Exp $ */ 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 61 #include <openssl/err.h> 62 #include <openssl/objects.h> 63 #include <openssl/x509.h> 64 65 #include "asn1_locl.h" 66 #include "evp_locl.h" 67 #include "x509_lcl.h" 68 69 long 70 PKCS7_ctrl(PKCS7 *p7, int cmd, long larg, char *parg) 71 { 72 int nid; 73 long ret; 74 75 nid = OBJ_obj2nid(p7->type); 76 77 switch (cmd) { 78 case PKCS7_OP_SET_DETACHED_SIGNATURE: 79 if (nid == NID_pkcs7_signed) { 80 ret = p7->detached = (int)larg; 81 if (ret && PKCS7_type_is_data(p7->d.sign->contents)) { 82 ASN1_OCTET_STRING *os; 83 os = p7->d.sign->contents->d.data; 84 ASN1_OCTET_STRING_free(os); 85 p7->d.sign->contents->d.data = NULL; 86 } 87 } else { 88 PKCS7error(PKCS7_R_OPERATION_NOT_SUPPORTED_ON_THIS_TYPE); 89 ret = 0; 90 } 91 break; 92 case PKCS7_OP_GET_DETACHED_SIGNATURE: 93 if (nid == NID_pkcs7_signed) { 94 if (!p7->d.sign || !p7->d.sign->contents->d.ptr) 95 ret = 1; 96 else 97 ret = 0; 98 99 p7->detached = ret; 100 } else { 101 PKCS7error(PKCS7_R_OPERATION_NOT_SUPPORTED_ON_THIS_TYPE); 102 ret = 0; 103 } 104 105 break; 106 default: 107 PKCS7error(PKCS7_R_UNKNOWN_OPERATION); 108 ret = 0; 109 } 110 return (ret); 111 } 112 113 int 114 PKCS7_content_new(PKCS7 *p7, int type) 115 { 116 PKCS7 *ret = NULL; 117 118 if ((ret = PKCS7_new()) == NULL) 119 goto err; 120 if (!PKCS7_set_type(ret, type)) 121 goto err; 122 if (!PKCS7_set_content(p7, ret)) 123 goto err; 124 125 return (1); 126 err: 127 if (ret != NULL) 128 PKCS7_free(ret); 129 return (0); 130 } 131 132 int 133 PKCS7_set_content(PKCS7 *p7, PKCS7 *p7_data) 134 { 135 int i; 136 137 i = OBJ_obj2nid(p7->type); 138 switch (i) { 139 case NID_pkcs7_signed: 140 if (p7->d.sign->contents != NULL) 141 PKCS7_free(p7->d.sign->contents); 142 p7->d.sign->contents = p7_data; 143 break; 144 case NID_pkcs7_digest: 145 if (p7->d.digest->contents != NULL) 146 PKCS7_free(p7->d.digest->contents); 147 p7->d.digest->contents = p7_data; 148 break; 149 case NID_pkcs7_data: 150 case NID_pkcs7_enveloped: 151 case NID_pkcs7_signedAndEnveloped: 152 case NID_pkcs7_encrypted: 153 default: 154 PKCS7error(PKCS7_R_UNSUPPORTED_CONTENT_TYPE); 155 goto err; 156 } 157 return (1); 158 err: 159 return (0); 160 } 161 162 int 163 PKCS7_set_type(PKCS7 *p7, int type) 164 { 165 ASN1_OBJECT *obj; 166 167 /*PKCS7_content_free(p7);*/ 168 obj=OBJ_nid2obj(type); /* will not fail */ 169 170 switch (type) { 171 case NID_pkcs7_signed: 172 p7->type = obj; 173 if ((p7->d.sign = PKCS7_SIGNED_new()) == NULL) 174 goto err; 175 if (!ASN1_INTEGER_set(p7->d.sign->version, 1)) { 176 PKCS7_SIGNED_free(p7->d.sign); 177 p7->d.sign = NULL; 178 goto err; 179 } 180 break; 181 case NID_pkcs7_data: 182 p7->type = obj; 183 if ((p7->d.data = ASN1_OCTET_STRING_new()) == NULL) 184 goto err; 185 break; 186 case NID_pkcs7_signedAndEnveloped: 187 p7->type = obj; 188 if ((p7->d.signed_and_enveloped = 189 PKCS7_SIGN_ENVELOPE_new()) == NULL) 190 goto err; 191 if (!ASN1_INTEGER_set(p7->d.signed_and_enveloped->version, 1)) 192 goto err; 193 p7->d.signed_and_enveloped->enc_data->content_type = 194 OBJ_nid2obj(NID_pkcs7_data); 195 break; 196 case NID_pkcs7_enveloped: 197 p7->type = obj; 198 if ((p7->d.enveloped = PKCS7_ENVELOPE_new()) == NULL) 199 goto err; 200 if (!ASN1_INTEGER_set(p7->d.enveloped->version, 0)) 201 goto err; 202 p7->d.enveloped->enc_data->content_type = 203 OBJ_nid2obj(NID_pkcs7_data); 204 break; 205 case NID_pkcs7_encrypted: 206 p7->type = obj; 207 if ((p7->d.encrypted = PKCS7_ENCRYPT_new()) == NULL) 208 goto err; 209 if (!ASN1_INTEGER_set(p7->d.encrypted->version, 0)) 210 goto err; 211 p7->d.encrypted->enc_data->content_type = 212 OBJ_nid2obj(NID_pkcs7_data); 213 break; 214 215 case NID_pkcs7_digest: 216 p7->type = obj; 217 if ((p7->d.digest = PKCS7_DIGEST_new()) == NULL) 218 goto err; 219 if (!ASN1_INTEGER_set(p7->d.digest->version, 0)) 220 goto err; 221 break; 222 default: 223 PKCS7error(PKCS7_R_UNSUPPORTED_CONTENT_TYPE); 224 goto err; 225 } 226 return (1); 227 err: 228 return (0); 229 } 230 231 int 232 PKCS7_set0_type_other(PKCS7 *p7, int type, ASN1_TYPE *other) 233 { 234 p7->type = OBJ_nid2obj(type); 235 p7->d.other = other; 236 return 1; 237 } 238 239 int 240 PKCS7_add_signer(PKCS7 *p7, PKCS7_SIGNER_INFO *psi) 241 { 242 int i, j, nid; 243 X509_ALGOR *alg; 244 STACK_OF(PKCS7_SIGNER_INFO) *signer_sk; 245 STACK_OF(X509_ALGOR) *md_sk; 246 247 i = OBJ_obj2nid(p7->type); 248 switch (i) { 249 case NID_pkcs7_signed: 250 signer_sk = p7->d.sign->signer_info; 251 md_sk = p7->d.sign->md_algs; 252 break; 253 case NID_pkcs7_signedAndEnveloped: 254 signer_sk = p7->d.signed_and_enveloped->signer_info; 255 md_sk = p7->d.signed_and_enveloped->md_algs; 256 break; 257 default: 258 PKCS7error(PKCS7_R_WRONG_CONTENT_TYPE); 259 return (0); 260 } 261 262 nid = OBJ_obj2nid(psi->digest_alg->algorithm); 263 264 /* If the digest is not currently listed, add it */ 265 j = 0; 266 for (i = 0; i < sk_X509_ALGOR_num(md_sk); i++) { 267 alg = sk_X509_ALGOR_value(md_sk, i); 268 if (OBJ_obj2nid(alg->algorithm) == nid) { 269 j = 1; 270 break; 271 } 272 } 273 if (!j) /* we need to add another algorithm */ 274 { 275 if (!(alg = X509_ALGOR_new()) || 276 !(alg->parameter = ASN1_TYPE_new())) { 277 X509_ALGOR_free(alg); 278 PKCS7error(ERR_R_MALLOC_FAILURE); 279 return (0); 280 } 281 alg->algorithm = OBJ_nid2obj(nid); 282 alg->parameter->type = V_ASN1_NULL; 283 if (!sk_X509_ALGOR_push(md_sk, alg)) { 284 X509_ALGOR_free(alg); 285 return 0; 286 } 287 } 288 289 if (!sk_PKCS7_SIGNER_INFO_push(signer_sk, psi)) 290 return 0; 291 return (1); 292 } 293 294 int 295 PKCS7_add_certificate(PKCS7 *p7, X509 *x509) 296 { 297 int i; 298 STACK_OF(X509) **sk; 299 300 i = OBJ_obj2nid(p7->type); 301 switch (i) { 302 case NID_pkcs7_signed: 303 sk = &(p7->d.sign->cert); 304 break; 305 case NID_pkcs7_signedAndEnveloped: 306 sk = &(p7->d.signed_and_enveloped->cert); 307 break; 308 default: 309 PKCS7error(PKCS7_R_WRONG_CONTENT_TYPE); 310 return (0); 311 } 312 313 if (*sk == NULL) 314 *sk = sk_X509_new_null(); 315 if (*sk == NULL) { 316 PKCS7error(ERR_R_MALLOC_FAILURE); 317 return 0; 318 } 319 CRYPTO_add(&x509->references, 1, CRYPTO_LOCK_X509); 320 if (!sk_X509_push(*sk, x509)) { 321 X509_free(x509); 322 return 0; 323 } 324 return (1); 325 } 326 327 int 328 PKCS7_add_crl(PKCS7 *p7, X509_CRL *crl) 329 { 330 int i; 331 STACK_OF(X509_CRL) **sk; 332 333 i = OBJ_obj2nid(p7->type); 334 switch (i) { 335 case NID_pkcs7_signed: 336 sk = &(p7->d.sign->crl); 337 break; 338 case NID_pkcs7_signedAndEnveloped: 339 sk = &(p7->d.signed_and_enveloped->crl); 340 break; 341 default: 342 PKCS7error(PKCS7_R_WRONG_CONTENT_TYPE); 343 return (0); 344 } 345 346 if (*sk == NULL) 347 *sk = sk_X509_CRL_new_null(); 348 if (*sk == NULL) { 349 PKCS7error(ERR_R_MALLOC_FAILURE); 350 return 0; 351 } 352 353 CRYPTO_add(&crl->references, 1, CRYPTO_LOCK_X509_CRL); 354 if (!sk_X509_CRL_push(*sk, crl)) { 355 X509_CRL_free(crl); 356 return 0; 357 } 358 return (1); 359 } 360 361 int 362 PKCS7_SIGNER_INFO_set(PKCS7_SIGNER_INFO *p7i, X509 *x509, EVP_PKEY *pkey, 363 const EVP_MD *dgst) 364 { 365 int ret; 366 367 /* We now need to add another PKCS7_SIGNER_INFO entry */ 368 if (!ASN1_INTEGER_set(p7i->version, 1)) 369 goto err; 370 if (!X509_NAME_set(&p7i->issuer_and_serial->issuer, 371 X509_get_issuer_name(x509))) 372 goto err; 373 374 /* because ASN1_INTEGER_set is used to set a 'long' we will do 375 * things the ugly way. */ 376 ASN1_INTEGER_free(p7i->issuer_and_serial->serial); 377 if (!(p7i->issuer_and_serial->serial = 378 ASN1_INTEGER_dup(X509_get_serialNumber(x509)))) 379 goto err; 380 381 /* lets keep the pkey around for a while */ 382 CRYPTO_add(&pkey->references, 1, CRYPTO_LOCK_EVP_PKEY); 383 p7i->pkey = pkey; 384 385 /* Set the algorithms */ 386 387 X509_ALGOR_set0(p7i->digest_alg, OBJ_nid2obj(EVP_MD_type(dgst)), 388 V_ASN1_NULL, NULL); 389 390 if (pkey->ameth && pkey->ameth->pkey_ctrl) { 391 ret = pkey->ameth->pkey_ctrl(pkey, ASN1_PKEY_CTRL_PKCS7_SIGN, 392 0, p7i); 393 if (ret > 0) 394 return 1; 395 if (ret != -2) { 396 PKCS7error(PKCS7_R_SIGNING_CTRL_FAILURE); 397 return 0; 398 } 399 } 400 PKCS7error(PKCS7_R_SIGNING_NOT_SUPPORTED_FOR_THIS_KEY_TYPE); 401 err: 402 return 0; 403 } 404 405 PKCS7_SIGNER_INFO * 406 PKCS7_add_signature(PKCS7 *p7, X509 *x509, EVP_PKEY *pkey, const EVP_MD *dgst) 407 { 408 PKCS7_SIGNER_INFO *si = NULL; 409 410 if (dgst == NULL) { 411 int def_nid; 412 if (EVP_PKEY_get_default_digest_nid(pkey, &def_nid) <= 0) 413 goto err; 414 dgst = EVP_get_digestbynid(def_nid); 415 if (dgst == NULL) { 416 PKCS7error(PKCS7_R_NO_DEFAULT_DIGEST); 417 goto err; 418 } 419 } 420 421 if ((si = PKCS7_SIGNER_INFO_new()) == NULL) 422 goto err; 423 if (!PKCS7_SIGNER_INFO_set(si, x509, pkey, dgst)) 424 goto err; 425 if (!PKCS7_add_signer(p7, si)) 426 goto err; 427 return (si); 428 err: 429 if (si) 430 PKCS7_SIGNER_INFO_free(si); 431 return (NULL); 432 } 433 434 int 435 PKCS7_set_digest(PKCS7 *p7, const EVP_MD *md) 436 { 437 if (PKCS7_type_is_digest(p7)) { 438 if (!(p7->d.digest->md->parameter = ASN1_TYPE_new())) { 439 PKCS7error(ERR_R_MALLOC_FAILURE); 440 return 0; 441 } 442 p7->d.digest->md->parameter->type = V_ASN1_NULL; 443 p7->d.digest->md->algorithm = OBJ_nid2obj(EVP_MD_nid(md)); 444 return 1; 445 } 446 447 PKCS7error(PKCS7_R_WRONG_CONTENT_TYPE); 448 return 1; 449 } 450 451 STACK_OF(PKCS7_SIGNER_INFO) * 452 PKCS7_get_signer_info(PKCS7 *p7) 453 { 454 if (p7 == NULL || p7->d.ptr == NULL) 455 return (NULL); 456 if (PKCS7_type_is_signed(p7)) { 457 return (p7->d.sign->signer_info); 458 } else if (PKCS7_type_is_signedAndEnveloped(p7)) { 459 return (p7->d.signed_and_enveloped->signer_info); 460 } else 461 return (NULL); 462 } 463 464 void 465 PKCS7_SIGNER_INFO_get0_algs(PKCS7_SIGNER_INFO *si, EVP_PKEY **pk, 466 X509_ALGOR **pdig, X509_ALGOR **psig) 467 { 468 if (pk) 469 *pk = si->pkey; 470 if (pdig) 471 *pdig = si->digest_alg; 472 if (psig) 473 *psig = si->digest_enc_alg; 474 } 475 476 void 477 PKCS7_RECIP_INFO_get0_alg(PKCS7_RECIP_INFO *ri, X509_ALGOR **penc) 478 { 479 if (penc) 480 *penc = ri->key_enc_algor; 481 } 482 483 PKCS7_RECIP_INFO * 484 PKCS7_add_recipient(PKCS7 *p7, X509 *x509) 485 { 486 PKCS7_RECIP_INFO *ri; 487 488 if ((ri = PKCS7_RECIP_INFO_new()) == NULL) 489 goto err; 490 if (!PKCS7_RECIP_INFO_set(ri, x509)) 491 goto err; 492 if (!PKCS7_add_recipient_info(p7, ri)) 493 goto err; 494 return ri; 495 err: 496 if (ri) 497 PKCS7_RECIP_INFO_free(ri); 498 return NULL; 499 } 500 501 int 502 PKCS7_add_recipient_info(PKCS7 *p7, PKCS7_RECIP_INFO *ri) 503 { 504 int i; 505 STACK_OF(PKCS7_RECIP_INFO) *sk; 506 507 i = OBJ_obj2nid(p7->type); 508 switch (i) { 509 case NID_pkcs7_signedAndEnveloped: 510 sk = p7->d.signed_and_enveloped->recipientinfo; 511 break; 512 case NID_pkcs7_enveloped: 513 sk = p7->d.enveloped->recipientinfo; 514 break; 515 default: 516 PKCS7error(PKCS7_R_WRONG_CONTENT_TYPE); 517 return (0); 518 } 519 520 if (!sk_PKCS7_RECIP_INFO_push(sk, ri)) 521 return 0; 522 return (1); 523 } 524 525 int 526 PKCS7_RECIP_INFO_set(PKCS7_RECIP_INFO *p7i, X509 *x509) 527 { 528 int ret; 529 EVP_PKEY *pkey = NULL; 530 if (!ASN1_INTEGER_set(p7i->version, 0)) 531 return 0; 532 if (!X509_NAME_set(&p7i->issuer_and_serial->issuer, 533 X509_get_issuer_name(x509))) 534 return 0; 535 536 ASN1_INTEGER_free(p7i->issuer_and_serial->serial); 537 if (!(p7i->issuer_and_serial->serial = 538 ASN1_INTEGER_dup(X509_get_serialNumber(x509)))) 539 return 0; 540 541 pkey = X509_get_pubkey(x509); 542 543 if (!pkey || !pkey->ameth || !pkey->ameth->pkey_ctrl) { 544 PKCS7error(PKCS7_R_ENCRYPTION_NOT_SUPPORTED_FOR_THIS_KEY_TYPE); 545 goto err; 546 } 547 548 ret = pkey->ameth->pkey_ctrl(pkey, ASN1_PKEY_CTRL_PKCS7_ENCRYPT, 549 0, p7i); 550 if (ret == -2) { 551 PKCS7error(PKCS7_R_ENCRYPTION_NOT_SUPPORTED_FOR_THIS_KEY_TYPE); 552 goto err; 553 } 554 if (ret <= 0) { 555 PKCS7error(PKCS7_R_ENCRYPTION_CTRL_FAILURE); 556 goto err; 557 } 558 559 EVP_PKEY_free(pkey); 560 561 CRYPTO_add(&x509->references, 1, CRYPTO_LOCK_X509); 562 p7i->cert = x509; 563 564 return 1; 565 566 err: 567 EVP_PKEY_free(pkey); 568 return 0; 569 } 570 571 X509 * 572 PKCS7_cert_from_signer_info(PKCS7 *p7, PKCS7_SIGNER_INFO *si) 573 { 574 if (PKCS7_type_is_signed(p7)) 575 return(X509_find_by_issuer_and_serial(p7->d.sign->cert, 576 si->issuer_and_serial->issuer, 577 si->issuer_and_serial->serial)); 578 else 579 return (NULL); 580 } 581 582 int 583 PKCS7_set_cipher(PKCS7 *p7, const EVP_CIPHER *cipher) 584 { 585 int i; 586 PKCS7_ENC_CONTENT *ec; 587 588 i = OBJ_obj2nid(p7->type); 589 switch (i) { 590 case NID_pkcs7_signedAndEnveloped: 591 ec = p7->d.signed_and_enveloped->enc_data; 592 break; 593 case NID_pkcs7_enveloped: 594 ec = p7->d.enveloped->enc_data; 595 break; 596 default: 597 PKCS7error(PKCS7_R_WRONG_CONTENT_TYPE); 598 return (0); 599 } 600 601 /* Check cipher OID exists and has data in it*/ 602 i = EVP_CIPHER_type(cipher); 603 if (i == NID_undef) { 604 PKCS7error(PKCS7_R_CIPHER_HAS_NO_OBJECT_IDENTIFIER); 605 return (0); 606 } 607 608 ec->cipher = cipher; 609 return 1; 610 } 611 612 int 613 PKCS7_stream(unsigned char ***boundary, PKCS7 *p7) 614 { 615 ASN1_OCTET_STRING *os = NULL; 616 617 switch (OBJ_obj2nid(p7->type)) { 618 case NID_pkcs7_data: 619 os = p7->d.data; 620 break; 621 622 case NID_pkcs7_signedAndEnveloped: 623 os = p7->d.signed_and_enveloped->enc_data->enc_data; 624 if (os == NULL) { 625 os = ASN1_OCTET_STRING_new(); 626 p7->d.signed_and_enveloped->enc_data->enc_data = os; 627 } 628 break; 629 630 case NID_pkcs7_enveloped: 631 os = p7->d.enveloped->enc_data->enc_data; 632 if (os == NULL) { 633 os = ASN1_OCTET_STRING_new(); 634 p7->d.enveloped->enc_data->enc_data = os; 635 } 636 break; 637 638 case NID_pkcs7_signed: 639 os = p7->d.sign->contents->d.data; 640 break; 641 642 default: 643 os = NULL; 644 break; 645 } 646 647 if (os == NULL) 648 return 0; 649 650 os->flags |= ASN1_STRING_FLAG_NDEF; 651 *boundary = &os->data; 652 653 return 1; 654 } 655