1 /* 2 * Copyright 2008-2023 The OpenSSL Project Authors. All Rights Reserved. 3 * 4 * Licensed under the Apache License 2.0 (the "License"). You may not use 5 * this file except in compliance with the License. You can obtain a copy 6 * in the file LICENSE in the source distribution or at 7 * https://www.openssl.org/source/license.html 8 */ 9 10 #include "internal/cryptlib.h" 11 #include <openssl/asn1t.h> 12 #include <openssl/pem.h> 13 #include <openssl/x509v3.h> 14 #include <openssl/err.h> 15 #include <openssl/cms.h> 16 #include <openssl/evp.h> 17 #include "internal/sizes.h" 18 #include "crypto/asn1.h" 19 #include "crypto/evp.h" 20 #include "crypto/x509.h" 21 #include "cms_local.h" 22 23 /* CMS EnvelopedData Utilities */ 24 static void cms_env_set_version(CMS_EnvelopedData *env); 25 26 #define CMS_ENVELOPED_STANDARD 1 27 #define CMS_ENVELOPED_AUTH 2 28 29 static int cms_get_enveloped_type(const CMS_ContentInfo *cms) 30 { 31 int nid = OBJ_obj2nid(cms->contentType); 32 33 switch (nid) { 34 case NID_pkcs7_enveloped: 35 return CMS_ENVELOPED_STANDARD; 36 37 case NID_id_smime_ct_authEnvelopedData: 38 return CMS_ENVELOPED_AUTH; 39 40 default: 41 ERR_raise(ERR_LIB_CMS, CMS_R_CONTENT_TYPE_NOT_ENVELOPED_DATA); 42 return 0; 43 } 44 } 45 46 CMS_EnvelopedData *ossl_cms_get0_enveloped(CMS_ContentInfo *cms) 47 { 48 if (OBJ_obj2nid(cms->contentType) != NID_pkcs7_enveloped) { 49 ERR_raise(ERR_LIB_CMS, CMS_R_CONTENT_TYPE_NOT_ENVELOPED_DATA); 50 return NULL; 51 } 52 return cms->d.envelopedData; 53 } 54 55 CMS_AuthEnvelopedData *ossl_cms_get0_auth_enveloped(CMS_ContentInfo *cms) 56 { 57 if (OBJ_obj2nid(cms->contentType) != NID_id_smime_ct_authEnvelopedData) { 58 ERR_raise(ERR_LIB_CMS, CMS_R_CONTENT_TYPE_NOT_ENVELOPED_DATA); 59 return NULL; 60 } 61 return cms->d.authEnvelopedData; 62 } 63 64 static CMS_EnvelopedData *cms_enveloped_data_init(CMS_ContentInfo *cms) 65 { 66 if (cms->d.other == NULL) { 67 cms->d.envelopedData = M_ASN1_new_of(CMS_EnvelopedData); 68 if (cms->d.envelopedData == NULL) { 69 ERR_raise(ERR_LIB_CMS, ERR_R_MALLOC_FAILURE); 70 return NULL; 71 } 72 cms->d.envelopedData->version = 0; 73 cms->d.envelopedData->encryptedContentInfo->contentType = 74 OBJ_nid2obj(NID_pkcs7_data); 75 ASN1_OBJECT_free(cms->contentType); 76 cms->contentType = OBJ_nid2obj(NID_pkcs7_enveloped); 77 return cms->d.envelopedData; 78 } 79 return ossl_cms_get0_enveloped(cms); 80 } 81 82 static CMS_AuthEnvelopedData * 83 cms_auth_enveloped_data_init(CMS_ContentInfo *cms) 84 { 85 if (cms->d.other == NULL) { 86 cms->d.authEnvelopedData = M_ASN1_new_of(CMS_AuthEnvelopedData); 87 if (cms->d.authEnvelopedData == NULL) { 88 ERR_raise(ERR_LIB_CMS, ERR_R_MALLOC_FAILURE); 89 return NULL; 90 } 91 /* Defined in RFC 5083 - Section 2.1. "AuthEnvelopedData Type" */ 92 cms->d.authEnvelopedData->version = 0; 93 cms->d.authEnvelopedData->authEncryptedContentInfo->contentType = 94 OBJ_nid2obj(NID_pkcs7_data); 95 ASN1_OBJECT_free(cms->contentType); 96 cms->contentType = OBJ_nid2obj(NID_id_smime_ct_authEnvelopedData); 97 return cms->d.authEnvelopedData; 98 } 99 return ossl_cms_get0_auth_enveloped(cms); 100 } 101 102 int ossl_cms_env_asn1_ctrl(CMS_RecipientInfo *ri, int cmd) 103 { 104 EVP_PKEY *pkey; 105 int i; 106 if (ri->type == CMS_RECIPINFO_TRANS) 107 pkey = ri->d.ktri->pkey; 108 else if (ri->type == CMS_RECIPINFO_AGREE) { 109 EVP_PKEY_CTX *pctx = ri->d.kari->pctx; 110 111 if (pctx == NULL) 112 return 0; 113 pkey = EVP_PKEY_CTX_get0_pkey(pctx); 114 if (pkey == NULL) 115 return 0; 116 } else 117 return 0; 118 119 if (EVP_PKEY_is_a(pkey, "DHX") || EVP_PKEY_is_a(pkey, "DH")) 120 return ossl_cms_dh_envelope(ri, cmd); 121 else if (EVP_PKEY_is_a(pkey, "EC")) 122 return ossl_cms_ecdh_envelope(ri, cmd); 123 else if (EVP_PKEY_is_a(pkey, "RSA")) 124 return ossl_cms_rsa_envelope(ri, cmd); 125 126 /* Something else? We'll give engines etc a chance to handle this */ 127 if (pkey->ameth == NULL || pkey->ameth->pkey_ctrl == NULL) 128 return 1; 129 i = pkey->ameth->pkey_ctrl(pkey, ASN1_PKEY_CTRL_CMS_ENVELOPE, cmd, ri); 130 if (i == -2) { 131 ERR_raise(ERR_LIB_CMS, CMS_R_NOT_SUPPORTED_FOR_THIS_KEY_TYPE); 132 return 0; 133 } 134 if (i <= 0) { 135 ERR_raise(ERR_LIB_CMS, CMS_R_CTRL_FAILURE); 136 return 0; 137 } 138 return 1; 139 } 140 141 CMS_EncryptedContentInfo *ossl_cms_get0_env_enc_content(const CMS_ContentInfo *cms) 142 { 143 switch (cms_get_enveloped_type(cms)) { 144 case CMS_ENVELOPED_STANDARD: 145 return cms->d.envelopedData == NULL ? NULL 146 : cms->d.envelopedData->encryptedContentInfo; 147 148 case CMS_ENVELOPED_AUTH: 149 return cms->d.authEnvelopedData == NULL ? NULL 150 : cms->d.authEnvelopedData->authEncryptedContentInfo; 151 152 default: 153 return NULL; 154 } 155 } 156 157 STACK_OF(CMS_RecipientInfo) *CMS_get0_RecipientInfos(CMS_ContentInfo *cms) 158 { 159 switch (cms_get_enveloped_type(cms)) { 160 case CMS_ENVELOPED_STANDARD: 161 return cms->d.envelopedData->recipientInfos; 162 163 case CMS_ENVELOPED_AUTH: 164 return cms->d.authEnvelopedData->recipientInfos; 165 166 default: 167 return NULL; 168 } 169 } 170 171 void ossl_cms_RecipientInfos_set_cmsctx(CMS_ContentInfo *cms) 172 { 173 int i; 174 CMS_RecipientInfo *ri; 175 const CMS_CTX *ctx = ossl_cms_get0_cmsctx(cms); 176 STACK_OF(CMS_RecipientInfo) *rinfos = CMS_get0_RecipientInfos(cms); 177 178 for (i = 0; i < sk_CMS_RecipientInfo_num(rinfos); i++) { 179 ri = sk_CMS_RecipientInfo_value(rinfos, i); 180 if (ri != NULL) { 181 switch (ri->type) { 182 case CMS_RECIPINFO_AGREE: 183 ri->d.kari->cms_ctx = ctx; 184 break; 185 case CMS_RECIPINFO_TRANS: 186 ri->d.ktri->cms_ctx = ctx; 187 ossl_x509_set0_libctx(ri->d.ktri->recip, 188 ossl_cms_ctx_get0_libctx(ctx), 189 ossl_cms_ctx_get0_propq(ctx)); 190 break; 191 case CMS_RECIPINFO_KEK: 192 ri->d.kekri->cms_ctx = ctx; 193 break; 194 case CMS_RECIPINFO_PASS: 195 ri->d.pwri->cms_ctx = ctx; 196 break; 197 default: 198 break; 199 } 200 } 201 } 202 } 203 204 int CMS_RecipientInfo_type(CMS_RecipientInfo *ri) 205 { 206 return ri->type; 207 } 208 209 EVP_PKEY_CTX *CMS_RecipientInfo_get0_pkey_ctx(CMS_RecipientInfo *ri) 210 { 211 if (ri->type == CMS_RECIPINFO_TRANS) 212 return ri->d.ktri->pctx; 213 else if (ri->type == CMS_RECIPINFO_AGREE) 214 return ri->d.kari->pctx; 215 return NULL; 216 } 217 218 CMS_ContentInfo *CMS_EnvelopedData_create_ex(const EVP_CIPHER *cipher, 219 OSSL_LIB_CTX *libctx, 220 const char *propq) 221 { 222 CMS_ContentInfo *cms; 223 CMS_EnvelopedData *env; 224 225 cms = CMS_ContentInfo_new_ex(libctx, propq); 226 if (cms == NULL) 227 goto merr; 228 env = cms_enveloped_data_init(cms); 229 if (env == NULL) 230 goto merr; 231 232 if (!ossl_cms_EncryptedContent_init(env->encryptedContentInfo, cipher, NULL, 233 0, ossl_cms_get0_cmsctx(cms))) 234 goto merr; 235 return cms; 236 merr: 237 CMS_ContentInfo_free(cms); 238 ERR_raise(ERR_LIB_CMS, ERR_R_MALLOC_FAILURE); 239 return NULL; 240 } 241 242 CMS_ContentInfo *CMS_EnvelopedData_create(const EVP_CIPHER *cipher) 243 { 244 return CMS_EnvelopedData_create_ex(cipher, NULL, NULL); 245 } 246 247 CMS_ContentInfo * 248 CMS_AuthEnvelopedData_create_ex(const EVP_CIPHER *cipher, OSSL_LIB_CTX *libctx, 249 const char *propq) 250 { 251 CMS_ContentInfo *cms; 252 CMS_AuthEnvelopedData *aenv; 253 254 cms = CMS_ContentInfo_new_ex(libctx, propq); 255 if (cms == NULL) 256 goto merr; 257 aenv = cms_auth_enveloped_data_init(cms); 258 if (aenv == NULL) 259 goto merr; 260 if (!ossl_cms_EncryptedContent_init(aenv->authEncryptedContentInfo, 261 cipher, NULL, 0, 262 ossl_cms_get0_cmsctx(cms))) 263 goto merr; 264 return cms; 265 merr: 266 CMS_ContentInfo_free(cms); 267 ERR_raise(ERR_LIB_CMS, ERR_R_MALLOC_FAILURE); 268 return NULL; 269 } 270 271 272 CMS_ContentInfo *CMS_AuthEnvelopedData_create(const EVP_CIPHER *cipher) 273 { 274 return CMS_AuthEnvelopedData_create_ex(cipher, NULL, NULL); 275 } 276 277 /* Key Transport Recipient Info (KTRI) routines */ 278 279 /* Initialise a ktri based on passed certificate and key */ 280 281 static int cms_RecipientInfo_ktri_init(CMS_RecipientInfo *ri, X509 *recip, 282 EVP_PKEY *pk, unsigned int flags, 283 const CMS_CTX *ctx) 284 { 285 CMS_KeyTransRecipientInfo *ktri; 286 int idtype; 287 288 ri->d.ktri = M_ASN1_new_of(CMS_KeyTransRecipientInfo); 289 if (!ri->d.ktri) 290 return 0; 291 ri->type = CMS_RECIPINFO_TRANS; 292 293 ktri = ri->d.ktri; 294 ktri->cms_ctx = ctx; 295 296 if (flags & CMS_USE_KEYID) { 297 ktri->version = 2; 298 idtype = CMS_RECIPINFO_KEYIDENTIFIER; 299 } else { 300 ktri->version = 0; 301 idtype = CMS_RECIPINFO_ISSUER_SERIAL; 302 } 303 304 /* 305 * Not a typo: RecipientIdentifier and SignerIdentifier are the same 306 * structure. 307 */ 308 309 if (!ossl_cms_set1_SignerIdentifier(ktri->rid, recip, idtype, ctx)) 310 return 0; 311 312 X509_up_ref(recip); 313 EVP_PKEY_up_ref(pk); 314 315 ktri->pkey = pk; 316 ktri->recip = recip; 317 318 if (flags & CMS_KEY_PARAM) { 319 ktri->pctx = EVP_PKEY_CTX_new_from_pkey(ossl_cms_ctx_get0_libctx(ctx), 320 ktri->pkey, 321 ossl_cms_ctx_get0_propq(ctx)); 322 if (ktri->pctx == NULL) 323 return 0; 324 if (EVP_PKEY_encrypt_init(ktri->pctx) <= 0) 325 return 0; 326 } else if (!ossl_cms_env_asn1_ctrl(ri, 0)) 327 return 0; 328 return 1; 329 } 330 331 /* 332 * Add a recipient certificate using appropriate type of RecipientInfo 333 */ 334 335 CMS_RecipientInfo *CMS_add1_recipient(CMS_ContentInfo *cms, X509 *recip, 336 EVP_PKEY *originatorPrivKey, 337 X509 *originator, unsigned int flags) 338 { 339 CMS_RecipientInfo *ri = NULL; 340 STACK_OF(CMS_RecipientInfo) *ris; 341 EVP_PKEY *pk = NULL; 342 const CMS_CTX *ctx = ossl_cms_get0_cmsctx(cms); 343 344 ris = CMS_get0_RecipientInfos(cms); 345 if (ris == NULL) 346 goto err; 347 348 /* Initialize recipient info */ 349 ri = M_ASN1_new_of(CMS_RecipientInfo); 350 if (ri == NULL) 351 goto merr; 352 353 pk = X509_get0_pubkey(recip); 354 if (pk == NULL) { 355 ERR_raise(ERR_LIB_CMS, CMS_R_ERROR_GETTING_PUBLIC_KEY); 356 goto err; 357 } 358 359 switch (ossl_cms_pkey_get_ri_type(pk)) { 360 361 case CMS_RECIPINFO_TRANS: 362 if (!cms_RecipientInfo_ktri_init(ri, recip, pk, flags, ctx)) 363 goto err; 364 break; 365 366 case CMS_RECIPINFO_AGREE: 367 if (!ossl_cms_RecipientInfo_kari_init(ri, recip, pk, originator, 368 originatorPrivKey, flags, ctx)) 369 goto err; 370 break; 371 372 default: 373 ERR_raise(ERR_LIB_CMS, CMS_R_NOT_SUPPORTED_FOR_THIS_KEY_TYPE); 374 goto err; 375 376 } 377 378 if (!sk_CMS_RecipientInfo_push(ris, ri)) 379 goto merr; 380 381 return ri; 382 383 merr: 384 ERR_raise(ERR_LIB_CMS, ERR_R_MALLOC_FAILURE); 385 err: 386 M_ASN1_free_of(ri, CMS_RecipientInfo); 387 return NULL; 388 389 } 390 391 CMS_RecipientInfo *CMS_add1_recipient_cert(CMS_ContentInfo *cms, X509 *recip, 392 unsigned int flags) 393 { 394 return CMS_add1_recipient(cms, recip, NULL, NULL, flags); 395 } 396 397 int CMS_RecipientInfo_ktri_get0_algs(CMS_RecipientInfo *ri, 398 EVP_PKEY **pk, X509 **recip, 399 X509_ALGOR **palg) 400 { 401 CMS_KeyTransRecipientInfo *ktri; 402 if (ri->type != CMS_RECIPINFO_TRANS) { 403 ERR_raise(ERR_LIB_CMS, CMS_R_NOT_KEY_TRANSPORT); 404 return 0; 405 } 406 407 ktri = ri->d.ktri; 408 409 if (pk) 410 *pk = ktri->pkey; 411 if (recip) 412 *recip = ktri->recip; 413 if (palg) 414 *palg = ktri->keyEncryptionAlgorithm; 415 return 1; 416 } 417 418 int CMS_RecipientInfo_ktri_get0_signer_id(CMS_RecipientInfo *ri, 419 ASN1_OCTET_STRING **keyid, 420 X509_NAME **issuer, 421 ASN1_INTEGER **sno) 422 { 423 CMS_KeyTransRecipientInfo *ktri; 424 if (ri->type != CMS_RECIPINFO_TRANS) { 425 ERR_raise(ERR_LIB_CMS, CMS_R_NOT_KEY_TRANSPORT); 426 return 0; 427 } 428 ktri = ri->d.ktri; 429 430 return ossl_cms_SignerIdentifier_get0_signer_id(ktri->rid, keyid, issuer, 431 sno); 432 } 433 434 int CMS_RecipientInfo_ktri_cert_cmp(CMS_RecipientInfo *ri, X509 *cert) 435 { 436 if (ri->type != CMS_RECIPINFO_TRANS) { 437 ERR_raise(ERR_LIB_CMS, CMS_R_NOT_KEY_TRANSPORT); 438 return -2; 439 } 440 return ossl_cms_SignerIdentifier_cert_cmp(ri->d.ktri->rid, cert); 441 } 442 443 int CMS_RecipientInfo_set0_pkey(CMS_RecipientInfo *ri, EVP_PKEY *pkey) 444 { 445 if (ri->type != CMS_RECIPINFO_TRANS) { 446 ERR_raise(ERR_LIB_CMS, CMS_R_NOT_KEY_TRANSPORT); 447 return 0; 448 } 449 EVP_PKEY_free(ri->d.ktri->pkey); 450 ri->d.ktri->pkey = pkey; 451 return 1; 452 } 453 454 /* Encrypt content key in key transport recipient info */ 455 456 static int cms_RecipientInfo_ktri_encrypt(const CMS_ContentInfo *cms, 457 CMS_RecipientInfo *ri) 458 { 459 CMS_KeyTransRecipientInfo *ktri; 460 CMS_EncryptedContentInfo *ec; 461 EVP_PKEY_CTX *pctx; 462 unsigned char *ek = NULL; 463 size_t eklen; 464 const CMS_CTX *ctx = ossl_cms_get0_cmsctx(cms); 465 466 int ret = 0; 467 468 if (ri->type != CMS_RECIPINFO_TRANS) { 469 ERR_raise(ERR_LIB_CMS, CMS_R_NOT_KEY_TRANSPORT); 470 return 0; 471 } 472 ktri = ri->d.ktri; 473 ec = ossl_cms_get0_env_enc_content(cms); 474 475 pctx = ktri->pctx; 476 477 if (pctx) { 478 if (!ossl_cms_env_asn1_ctrl(ri, 0)) 479 goto err; 480 } else { 481 pctx = EVP_PKEY_CTX_new_from_pkey(ossl_cms_ctx_get0_libctx(ctx), 482 ktri->pkey, 483 ossl_cms_ctx_get0_propq(ctx)); 484 if (pctx == NULL) 485 return 0; 486 487 if (EVP_PKEY_encrypt_init(pctx) <= 0) 488 goto err; 489 } 490 491 if (EVP_PKEY_encrypt(pctx, NULL, &eklen, ec->key, ec->keylen) <= 0) 492 goto err; 493 494 ek = OPENSSL_malloc(eklen); 495 496 if (ek == NULL) { 497 ERR_raise(ERR_LIB_CMS, ERR_R_MALLOC_FAILURE); 498 goto err; 499 } 500 501 if (EVP_PKEY_encrypt(pctx, ek, &eklen, ec->key, ec->keylen) <= 0) 502 goto err; 503 504 ASN1_STRING_set0(ktri->encryptedKey, ek, eklen); 505 ek = NULL; 506 507 ret = 1; 508 509 err: 510 EVP_PKEY_CTX_free(pctx); 511 ktri->pctx = NULL; 512 OPENSSL_free(ek); 513 return ret; 514 } 515 516 /* Decrypt content key from KTRI */ 517 518 static int cms_RecipientInfo_ktri_decrypt(CMS_ContentInfo *cms, 519 CMS_RecipientInfo *ri) 520 { 521 CMS_KeyTransRecipientInfo *ktri = ri->d.ktri; 522 EVP_PKEY *pkey = ktri->pkey; 523 unsigned char *ek = NULL; 524 size_t eklen; 525 int ret = 0; 526 size_t fixlen = 0; 527 const EVP_CIPHER *cipher = NULL; 528 EVP_CIPHER *fetched_cipher = NULL; 529 CMS_EncryptedContentInfo *ec; 530 const CMS_CTX *ctx = ossl_cms_get0_cmsctx(cms); 531 OSSL_LIB_CTX *libctx = ossl_cms_ctx_get0_libctx(ctx); 532 const char *propq = ossl_cms_ctx_get0_propq(ctx); 533 534 ec = ossl_cms_get0_env_enc_content(cms); 535 536 if (ktri->pkey == NULL) { 537 ERR_raise(ERR_LIB_CMS, CMS_R_NO_PRIVATE_KEY); 538 return 0; 539 } 540 541 if (cms->d.envelopedData->encryptedContentInfo->havenocert 542 && !cms->d.envelopedData->encryptedContentInfo->debug) { 543 X509_ALGOR *calg = ec->contentEncryptionAlgorithm; 544 char name[OSSL_MAX_NAME_SIZE]; 545 546 OBJ_obj2txt(name, sizeof(name), calg->algorithm, 0); 547 548 (void)ERR_set_mark(); 549 fetched_cipher = EVP_CIPHER_fetch(libctx, name, propq); 550 551 if (fetched_cipher != NULL) 552 cipher = fetched_cipher; 553 else 554 cipher = EVP_get_cipherbyobj(calg->algorithm); 555 if (cipher == NULL) { 556 (void)ERR_clear_last_mark(); 557 ERR_raise(ERR_LIB_CMS, CMS_R_UNKNOWN_CIPHER); 558 return 0; 559 } 560 (void)ERR_pop_to_mark(); 561 562 fixlen = EVP_CIPHER_get_key_length(cipher); 563 EVP_CIPHER_free(fetched_cipher); 564 } 565 566 ktri->pctx = EVP_PKEY_CTX_new_from_pkey(libctx, pkey, propq); 567 if (ktri->pctx == NULL) 568 goto err; 569 570 if (EVP_PKEY_decrypt_init(ktri->pctx) <= 0) 571 goto err; 572 573 if (!ossl_cms_env_asn1_ctrl(ri, 1)) 574 goto err; 575 576 if (EVP_PKEY_decrypt(ktri->pctx, NULL, &eklen, 577 ktri->encryptedKey->data, 578 ktri->encryptedKey->length) <= 0) 579 goto err; 580 581 ek = OPENSSL_malloc(eklen); 582 if (ek == NULL) { 583 ERR_raise(ERR_LIB_CMS, ERR_R_MALLOC_FAILURE); 584 goto err; 585 } 586 587 if (EVP_PKEY_decrypt(ktri->pctx, ek, &eklen, 588 ktri->encryptedKey->data, 589 ktri->encryptedKey->length) <= 0 590 || eklen == 0 591 || (fixlen != 0 && eklen != fixlen)) { 592 ERR_raise(ERR_LIB_CMS, CMS_R_CMS_LIB); 593 goto err; 594 } 595 596 ret = 1; 597 598 OPENSSL_clear_free(ec->key, ec->keylen); 599 ec->key = ek; 600 ec->keylen = eklen; 601 602 err: 603 EVP_PKEY_CTX_free(ktri->pctx); 604 ktri->pctx = NULL; 605 if (!ret) 606 OPENSSL_free(ek); 607 608 return ret; 609 } 610 611 /* Key Encrypted Key (KEK) RecipientInfo routines */ 612 613 int CMS_RecipientInfo_kekri_id_cmp(CMS_RecipientInfo *ri, 614 const unsigned char *id, size_t idlen) 615 { 616 ASN1_OCTET_STRING tmp_os; 617 CMS_KEKRecipientInfo *kekri; 618 if (ri->type != CMS_RECIPINFO_KEK) { 619 ERR_raise(ERR_LIB_CMS, CMS_R_NOT_KEK); 620 return -2; 621 } 622 kekri = ri->d.kekri; 623 tmp_os.type = V_ASN1_OCTET_STRING; 624 tmp_os.flags = 0; 625 tmp_os.data = (unsigned char *)id; 626 tmp_os.length = (int)idlen; 627 return ASN1_OCTET_STRING_cmp(&tmp_os, kekri->kekid->keyIdentifier); 628 } 629 630 /* For now hard code AES key wrap info */ 631 632 static size_t aes_wrap_keylen(int nid) 633 { 634 switch (nid) { 635 case NID_id_aes128_wrap: 636 return 16; 637 638 case NID_id_aes192_wrap: 639 return 24; 640 641 case NID_id_aes256_wrap: 642 return 32; 643 644 default: 645 return 0; 646 } 647 } 648 649 CMS_RecipientInfo *CMS_add0_recipient_key(CMS_ContentInfo *cms, int nid, 650 unsigned char *key, size_t keylen, 651 unsigned char *id, size_t idlen, 652 ASN1_GENERALIZEDTIME *date, 653 ASN1_OBJECT *otherTypeId, 654 ASN1_TYPE *otherType) 655 { 656 CMS_RecipientInfo *ri = NULL; 657 CMS_KEKRecipientInfo *kekri; 658 STACK_OF(CMS_RecipientInfo) *ris = CMS_get0_RecipientInfos(cms); 659 660 if (ris == NULL) 661 goto err; 662 663 if (nid == NID_undef) { 664 switch (keylen) { 665 case 16: 666 nid = NID_id_aes128_wrap; 667 break; 668 669 case 24: 670 nid = NID_id_aes192_wrap; 671 break; 672 673 case 32: 674 nid = NID_id_aes256_wrap; 675 break; 676 677 default: 678 ERR_raise(ERR_LIB_CMS, CMS_R_INVALID_KEY_LENGTH); 679 goto err; 680 } 681 682 } else { 683 684 size_t exp_keylen = aes_wrap_keylen(nid); 685 686 if (!exp_keylen) { 687 ERR_raise(ERR_LIB_CMS, CMS_R_UNSUPPORTED_KEK_ALGORITHM); 688 goto err; 689 } 690 691 if (keylen != exp_keylen) { 692 ERR_raise(ERR_LIB_CMS, CMS_R_INVALID_KEY_LENGTH); 693 goto err; 694 } 695 696 } 697 698 /* Initialize recipient info */ 699 ri = M_ASN1_new_of(CMS_RecipientInfo); 700 if (!ri) 701 goto merr; 702 703 ri->d.kekri = M_ASN1_new_of(CMS_KEKRecipientInfo); 704 if (!ri->d.kekri) 705 goto merr; 706 ri->type = CMS_RECIPINFO_KEK; 707 708 kekri = ri->d.kekri; 709 710 if (otherTypeId) { 711 kekri->kekid->other = M_ASN1_new_of(CMS_OtherKeyAttribute); 712 if (kekri->kekid->other == NULL) 713 goto merr; 714 } 715 716 if (!sk_CMS_RecipientInfo_push(ris, ri)) 717 goto merr; 718 719 /* After this point no calls can fail */ 720 721 kekri->version = 4; 722 723 kekri->key = key; 724 kekri->keylen = keylen; 725 726 ASN1_STRING_set0(kekri->kekid->keyIdentifier, id, idlen); 727 728 kekri->kekid->date = date; 729 730 if (kekri->kekid->other) { 731 kekri->kekid->other->keyAttrId = otherTypeId; 732 kekri->kekid->other->keyAttr = otherType; 733 } 734 735 X509_ALGOR_set0(kekri->keyEncryptionAlgorithm, 736 OBJ_nid2obj(nid), V_ASN1_UNDEF, NULL); 737 738 return ri; 739 740 merr: 741 ERR_raise(ERR_LIB_CMS, ERR_R_MALLOC_FAILURE); 742 err: 743 M_ASN1_free_of(ri, CMS_RecipientInfo); 744 return NULL; 745 } 746 747 int CMS_RecipientInfo_kekri_get0_id(CMS_RecipientInfo *ri, 748 X509_ALGOR **palg, 749 ASN1_OCTET_STRING **pid, 750 ASN1_GENERALIZEDTIME **pdate, 751 ASN1_OBJECT **potherid, 752 ASN1_TYPE **pothertype) 753 { 754 CMS_KEKIdentifier *rkid; 755 if (ri->type != CMS_RECIPINFO_KEK) { 756 ERR_raise(ERR_LIB_CMS, CMS_R_NOT_KEK); 757 return 0; 758 } 759 rkid = ri->d.kekri->kekid; 760 if (palg) 761 *palg = ri->d.kekri->keyEncryptionAlgorithm; 762 if (pid) 763 *pid = rkid->keyIdentifier; 764 if (pdate) 765 *pdate = rkid->date; 766 if (potherid) { 767 if (rkid->other) 768 *potherid = rkid->other->keyAttrId; 769 else 770 *potherid = NULL; 771 } 772 if (pothertype) { 773 if (rkid->other) 774 *pothertype = rkid->other->keyAttr; 775 else 776 *pothertype = NULL; 777 } 778 return 1; 779 } 780 781 int CMS_RecipientInfo_set0_key(CMS_RecipientInfo *ri, 782 unsigned char *key, size_t keylen) 783 { 784 CMS_KEKRecipientInfo *kekri; 785 if (ri->type != CMS_RECIPINFO_KEK) { 786 ERR_raise(ERR_LIB_CMS, CMS_R_NOT_KEK); 787 return 0; 788 } 789 790 kekri = ri->d.kekri; 791 kekri->key = key; 792 kekri->keylen = keylen; 793 return 1; 794 } 795 796 static EVP_CIPHER *cms_get_key_wrap_cipher(size_t keylen, const CMS_CTX *ctx) 797 { 798 const char *alg = NULL; 799 800 switch(keylen) { 801 case 16: 802 alg = "AES-128-WRAP"; 803 break; 804 case 24: 805 alg = "AES-192-WRAP"; 806 break; 807 case 32: 808 alg = "AES-256-WRAP"; 809 break; 810 default: 811 return NULL; 812 } 813 return EVP_CIPHER_fetch(ossl_cms_ctx_get0_libctx(ctx), alg, 814 ossl_cms_ctx_get0_propq(ctx)); 815 } 816 817 818 /* Encrypt content key in KEK recipient info */ 819 820 static int cms_RecipientInfo_kekri_encrypt(const CMS_ContentInfo *cms, 821 CMS_RecipientInfo *ri) 822 { 823 CMS_EncryptedContentInfo *ec; 824 CMS_KEKRecipientInfo *kekri; 825 unsigned char *wkey = NULL; 826 int wkeylen; 827 int r = 0; 828 EVP_CIPHER *cipher = NULL; 829 int outlen = 0; 830 EVP_CIPHER_CTX *ctx = NULL; 831 const CMS_CTX *cms_ctx = ossl_cms_get0_cmsctx(cms); 832 833 ec = ossl_cms_get0_env_enc_content(cms); 834 if (ec == NULL) 835 return 0; 836 837 kekri = ri->d.kekri; 838 839 if (kekri->key == NULL) { 840 ERR_raise(ERR_LIB_CMS, CMS_R_NO_KEY); 841 return 0; 842 } 843 844 cipher = cms_get_key_wrap_cipher(kekri->keylen, cms_ctx); 845 if (cipher == NULL) { 846 ERR_raise(ERR_LIB_CMS, CMS_R_INVALID_KEY_LENGTH); 847 goto err; 848 } 849 850 /* 8 byte prefix for AES wrap ciphers */ 851 wkey = OPENSSL_malloc(ec->keylen + 8); 852 if (wkey == NULL) { 853 ERR_raise(ERR_LIB_CMS, ERR_R_MALLOC_FAILURE); 854 goto err; 855 } 856 857 ctx = EVP_CIPHER_CTX_new(); 858 if (ctx == NULL) { 859 ERR_raise(ERR_LIB_CMS, ERR_R_MALLOC_FAILURE); 860 goto err; 861 } 862 863 EVP_CIPHER_CTX_set_flags(ctx, EVP_CIPHER_CTX_FLAG_WRAP_ALLOW); 864 if (!EVP_EncryptInit_ex(ctx, cipher, NULL, kekri->key, NULL) 865 || !EVP_EncryptUpdate(ctx, wkey, &wkeylen, ec->key, ec->keylen) 866 || !EVP_EncryptFinal_ex(ctx, wkey + wkeylen, &outlen)) { 867 ERR_raise(ERR_LIB_CMS, CMS_R_WRAP_ERROR); 868 goto err; 869 } 870 wkeylen += outlen; 871 if (!ossl_assert((size_t)wkeylen == ec->keylen + 8)) { 872 ERR_raise(ERR_LIB_CMS, CMS_R_WRAP_ERROR); 873 goto err; 874 } 875 876 ASN1_STRING_set0(kekri->encryptedKey, wkey, wkeylen); 877 878 r = 1; 879 880 err: 881 EVP_CIPHER_free(cipher); 882 if (!r) 883 OPENSSL_free(wkey); 884 EVP_CIPHER_CTX_free(ctx); 885 886 return r; 887 } 888 889 /* Decrypt content key in KEK recipient info */ 890 891 static int cms_RecipientInfo_kekri_decrypt(CMS_ContentInfo *cms, 892 CMS_RecipientInfo *ri) 893 { 894 CMS_EncryptedContentInfo *ec; 895 CMS_KEKRecipientInfo *kekri; 896 unsigned char *ukey = NULL; 897 int ukeylen; 898 int r = 0, wrap_nid; 899 EVP_CIPHER *cipher = NULL; 900 int outlen = 0; 901 EVP_CIPHER_CTX *ctx = NULL; 902 const CMS_CTX *cms_ctx = ossl_cms_get0_cmsctx(cms); 903 904 ec = ossl_cms_get0_env_enc_content(cms); 905 if (ec == NULL) 906 return 0; 907 908 kekri = ri->d.kekri; 909 910 if (!kekri->key) { 911 ERR_raise(ERR_LIB_CMS, CMS_R_NO_KEY); 912 return 0; 913 } 914 915 wrap_nid = OBJ_obj2nid(kekri->keyEncryptionAlgorithm->algorithm); 916 if (aes_wrap_keylen(wrap_nid) != kekri->keylen) { 917 ERR_raise(ERR_LIB_CMS, CMS_R_INVALID_KEY_LENGTH); 918 return 0; 919 } 920 921 /* If encrypted key length is invalid don't bother */ 922 923 if (kekri->encryptedKey->length < 16) { 924 ERR_raise(ERR_LIB_CMS, CMS_R_INVALID_ENCRYPTED_KEY_LENGTH); 925 goto err; 926 } 927 928 cipher = cms_get_key_wrap_cipher(kekri->keylen, cms_ctx); 929 if (cipher == NULL) { 930 ERR_raise(ERR_LIB_CMS, CMS_R_INVALID_KEY_LENGTH); 931 goto err; 932 } 933 934 ukey = OPENSSL_malloc(kekri->encryptedKey->length - 8); 935 if (ukey == NULL) { 936 ERR_raise(ERR_LIB_CMS, ERR_R_MALLOC_FAILURE); 937 goto err; 938 } 939 940 ctx = EVP_CIPHER_CTX_new(); 941 if (ctx == NULL) { 942 ERR_raise(ERR_LIB_CMS, ERR_R_MALLOC_FAILURE); 943 goto err; 944 } 945 946 if (!EVP_DecryptInit_ex(ctx, cipher, NULL, kekri->key, NULL) 947 || !EVP_DecryptUpdate(ctx, ukey, &ukeylen, 948 kekri->encryptedKey->data, 949 kekri->encryptedKey->length) 950 || !EVP_DecryptFinal_ex(ctx, ukey + ukeylen, &outlen)) { 951 ERR_raise(ERR_LIB_CMS, CMS_R_UNWRAP_ERROR); 952 goto err; 953 } 954 ukeylen += outlen; 955 956 OPENSSL_clear_free(ec->key, ec->keylen); 957 ec->key = ukey; 958 ec->keylen = ukeylen; 959 960 r = 1; 961 962 err: 963 EVP_CIPHER_free(cipher); 964 if (!r) 965 OPENSSL_free(ukey); 966 EVP_CIPHER_CTX_free(ctx); 967 968 return r; 969 } 970 971 int CMS_RecipientInfo_decrypt(CMS_ContentInfo *cms, CMS_RecipientInfo *ri) 972 { 973 switch (ri->type) { 974 case CMS_RECIPINFO_TRANS: 975 return cms_RecipientInfo_ktri_decrypt(cms, ri); 976 977 case CMS_RECIPINFO_KEK: 978 return cms_RecipientInfo_kekri_decrypt(cms, ri); 979 980 case CMS_RECIPINFO_PASS: 981 return ossl_cms_RecipientInfo_pwri_crypt(cms, ri, 0); 982 983 default: 984 ERR_raise(ERR_LIB_CMS, CMS_R_UNSUPPORTED_RECIPIENTINFO_TYPE); 985 return 0; 986 } 987 } 988 989 int CMS_RecipientInfo_encrypt(const CMS_ContentInfo *cms, CMS_RecipientInfo *ri) 990 { 991 switch (ri->type) { 992 case CMS_RECIPINFO_TRANS: 993 return cms_RecipientInfo_ktri_encrypt(cms, ri); 994 995 case CMS_RECIPINFO_AGREE: 996 return ossl_cms_RecipientInfo_kari_encrypt(cms, ri); 997 998 case CMS_RECIPINFO_KEK: 999 return cms_RecipientInfo_kekri_encrypt(cms, ri); 1000 1001 case CMS_RECIPINFO_PASS: 1002 return ossl_cms_RecipientInfo_pwri_crypt(cms, ri, 1); 1003 1004 default: 1005 ERR_raise(ERR_LIB_CMS, CMS_R_UNSUPPORTED_RECIPIENT_TYPE); 1006 return 0; 1007 } 1008 } 1009 1010 /* Check structures and fixup version numbers (if necessary) */ 1011 1012 static void cms_env_set_originfo_version(CMS_EnvelopedData *env) 1013 { 1014 CMS_OriginatorInfo *org = env->originatorInfo; 1015 int i; 1016 if (org == NULL) 1017 return; 1018 for (i = 0; i < sk_CMS_CertificateChoices_num(org->certificates); i++) { 1019 CMS_CertificateChoices *cch; 1020 cch = sk_CMS_CertificateChoices_value(org->certificates, i); 1021 if (cch->type == CMS_CERTCHOICE_OTHER) { 1022 env->version = 4; 1023 return; 1024 } else if (cch->type == CMS_CERTCHOICE_V2ACERT) { 1025 if (env->version < 3) 1026 env->version = 3; 1027 } 1028 } 1029 1030 for (i = 0; i < sk_CMS_RevocationInfoChoice_num(org->crls); i++) { 1031 CMS_RevocationInfoChoice *rch; 1032 rch = sk_CMS_RevocationInfoChoice_value(org->crls, i); 1033 if (rch->type == CMS_REVCHOICE_OTHER) { 1034 env->version = 4; 1035 return; 1036 } 1037 } 1038 } 1039 1040 static void cms_env_set_version(CMS_EnvelopedData *env) 1041 { 1042 int i; 1043 CMS_RecipientInfo *ri; 1044 1045 /* 1046 * Can't set version higher than 4 so if 4 or more already nothing to do. 1047 */ 1048 if (env->version >= 4) 1049 return; 1050 1051 cms_env_set_originfo_version(env); 1052 1053 if (env->version >= 3) 1054 return; 1055 1056 for (i = 0; i < sk_CMS_RecipientInfo_num(env->recipientInfos); i++) { 1057 ri = sk_CMS_RecipientInfo_value(env->recipientInfos, i); 1058 if (ri->type == CMS_RECIPINFO_PASS || ri->type == CMS_RECIPINFO_OTHER) { 1059 env->version = 3; 1060 return; 1061 } else if (ri->type != CMS_RECIPINFO_TRANS 1062 || ri->d.ktri->version != 0) { 1063 env->version = 2; 1064 } 1065 } 1066 if (env->originatorInfo || env->unprotectedAttrs) 1067 env->version = 2; 1068 if (env->version == 2) 1069 return; 1070 env->version = 0; 1071 } 1072 1073 static int cms_env_encrypt_content_key(const CMS_ContentInfo *cms, 1074 STACK_OF(CMS_RecipientInfo) *ris) 1075 { 1076 int i; 1077 CMS_RecipientInfo *ri; 1078 1079 for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++) { 1080 ri = sk_CMS_RecipientInfo_value(ris, i); 1081 if (CMS_RecipientInfo_encrypt(cms, ri) <= 0) 1082 return -1; 1083 } 1084 return 1; 1085 } 1086 1087 static void cms_env_clear_ec(CMS_EncryptedContentInfo *ec) 1088 { 1089 ec->cipher = NULL; 1090 OPENSSL_clear_free(ec->key, ec->keylen); 1091 ec->key = NULL; 1092 ec->keylen = 0; 1093 } 1094 1095 static BIO *cms_EnvelopedData_Decryption_init_bio(CMS_ContentInfo *cms) 1096 { 1097 CMS_EncryptedContentInfo *ec = cms->d.envelopedData->encryptedContentInfo; 1098 BIO *contentBio = ossl_cms_EncryptedContent_init_bio(ec, 1099 ossl_cms_get0_cmsctx(cms)); 1100 EVP_CIPHER_CTX *ctx = NULL; 1101 1102 if (contentBio == NULL) 1103 return NULL; 1104 1105 BIO_get_cipher_ctx(contentBio, &ctx); 1106 if (ctx == NULL) { 1107 BIO_free(contentBio); 1108 return NULL; 1109 } 1110 /* 1111 * If the selected cipher supports unprotected attributes, 1112 * deal with it using special ctrl function 1113 */ 1114 if ((EVP_CIPHER_get_flags(EVP_CIPHER_CTX_get0_cipher(ctx)) 1115 & EVP_CIPH_FLAG_CIPHER_WITH_MAC) != 0 1116 && EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_PROCESS_UNPROTECTED, 0, 1117 cms->d.envelopedData->unprotectedAttrs) <= 0) { 1118 BIO_free(contentBio); 1119 return NULL; 1120 } 1121 return contentBio; 1122 } 1123 1124 static BIO *cms_EnvelopedData_Encryption_init_bio(CMS_ContentInfo *cms) 1125 { 1126 CMS_EncryptedContentInfo *ec; 1127 STACK_OF(CMS_RecipientInfo) *rinfos; 1128 int ok = 0; 1129 BIO *ret; 1130 CMS_EnvelopedData *env = cms->d.envelopedData; 1131 1132 /* Get BIO first to set up key */ 1133 1134 ec = env->encryptedContentInfo; 1135 ret = ossl_cms_EncryptedContent_init_bio(ec, ossl_cms_get0_cmsctx(cms)); 1136 1137 /* If error end of processing */ 1138 if (!ret) 1139 return ret; 1140 1141 /* Now encrypt content key according to each RecipientInfo type */ 1142 rinfos = env->recipientInfos; 1143 if (cms_env_encrypt_content_key(cms, rinfos) < 0) { 1144 ERR_raise(ERR_LIB_CMS, CMS_R_ERROR_SETTING_RECIPIENTINFO); 1145 goto err; 1146 } 1147 1148 /* And finally set the version */ 1149 cms_env_set_version(env); 1150 1151 ok = 1; 1152 1153 err: 1154 cms_env_clear_ec(ec); 1155 if (ok) 1156 return ret; 1157 BIO_free(ret); 1158 return NULL; 1159 } 1160 1161 BIO *ossl_cms_EnvelopedData_init_bio(CMS_ContentInfo *cms) 1162 { 1163 if (cms->d.envelopedData->encryptedContentInfo->cipher != NULL) { 1164 /* If cipher is set it's encryption */ 1165 return cms_EnvelopedData_Encryption_init_bio(cms); 1166 } 1167 1168 /* If cipher is not set it's decryption */ 1169 return cms_EnvelopedData_Decryption_init_bio(cms); 1170 } 1171 1172 BIO *ossl_cms_AuthEnvelopedData_init_bio(CMS_ContentInfo *cms) 1173 { 1174 CMS_EncryptedContentInfo *ec; 1175 STACK_OF(CMS_RecipientInfo) *rinfos; 1176 int ok = 0; 1177 BIO *ret; 1178 CMS_AuthEnvelopedData *aenv = cms->d.authEnvelopedData; 1179 1180 /* Get BIO first to set up key */ 1181 ec = aenv->authEncryptedContentInfo; 1182 /* Set tag for decryption */ 1183 if (ec->cipher == NULL) { 1184 ec->tag = aenv->mac->data; 1185 ec->taglen = aenv->mac->length; 1186 } 1187 ret = ossl_cms_EncryptedContent_init_bio(ec, ossl_cms_get0_cmsctx(cms)); 1188 1189 /* If error or no cipher end of processing */ 1190 if (ret == NULL || ec->cipher == NULL) 1191 return ret; 1192 1193 /* Now encrypt content key according to each RecipientInfo type */ 1194 rinfos = aenv->recipientInfos; 1195 if (cms_env_encrypt_content_key(cms, rinfos) < 0) { 1196 ERR_raise(ERR_LIB_CMS, CMS_R_ERROR_SETTING_RECIPIENTINFO); 1197 goto err; 1198 } 1199 1200 /* And finally set the version */ 1201 aenv->version = 0; 1202 1203 ok = 1; 1204 1205 err: 1206 cms_env_clear_ec(ec); 1207 if (ok) 1208 return ret; 1209 BIO_free(ret); 1210 return NULL; 1211 } 1212 1213 int ossl_cms_EnvelopedData_final(CMS_ContentInfo *cms, BIO *chain) 1214 { 1215 CMS_EnvelopedData *env = NULL; 1216 EVP_CIPHER_CTX *ctx = NULL; 1217 BIO *mbio = BIO_find_type(chain, BIO_TYPE_CIPHER); 1218 1219 env = ossl_cms_get0_enveloped(cms); 1220 if (env == NULL) 1221 return 0; 1222 1223 if (mbio == NULL) { 1224 ERR_raise(ERR_LIB_CMS, CMS_R_CONTENT_NOT_FOUND); 1225 return 0; 1226 } 1227 1228 BIO_get_cipher_ctx(mbio, &ctx); 1229 1230 /* 1231 * If the selected cipher supports unprotected attributes, 1232 * deal with it using special ctrl function 1233 */ 1234 if ((EVP_CIPHER_get_flags(EVP_CIPHER_CTX_get0_cipher(ctx)) 1235 & EVP_CIPH_FLAG_CIPHER_WITH_MAC) != 0) { 1236 if (env->unprotectedAttrs == NULL) 1237 env->unprotectedAttrs = sk_X509_ATTRIBUTE_new_null(); 1238 1239 if (env->unprotectedAttrs == NULL) { 1240 ERR_raise(ERR_LIB_CMS, ERR_R_MALLOC_FAILURE); 1241 return 0; 1242 } 1243 1244 if (EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_PROCESS_UNPROTECTED, 1245 1, env->unprotectedAttrs) <= 0) { 1246 ERR_raise(ERR_LIB_CMS, CMS_R_CTRL_FAILURE); 1247 return 0; 1248 } 1249 } 1250 1251 cms_env_set_version(cms->d.envelopedData); 1252 return 1; 1253 } 1254 1255 int ossl_cms_AuthEnvelopedData_final(CMS_ContentInfo *cms, BIO *cmsbio) 1256 { 1257 EVP_CIPHER_CTX *ctx; 1258 unsigned char *tag = NULL; 1259 int taglen, ok = 0; 1260 1261 BIO_get_cipher_ctx(cmsbio, &ctx); 1262 1263 /* 1264 * The tag is set only for encryption. There is nothing to do for 1265 * decryption. 1266 */ 1267 if (!EVP_CIPHER_CTX_is_encrypting(ctx)) 1268 return 1; 1269 1270 taglen = EVP_CIPHER_CTX_get_tag_length(ctx); 1271 if (taglen <= 0 1272 || (tag = OPENSSL_malloc(taglen)) == NULL 1273 || EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_AEAD_GET_TAG, taglen, 1274 tag) <= 0) { 1275 ERR_raise(ERR_LIB_CMS, CMS_R_CIPHER_GET_TAG); 1276 goto err; 1277 } 1278 1279 if (!ASN1_OCTET_STRING_set(cms->d.authEnvelopedData->mac, tag, taglen)) 1280 goto err; 1281 1282 ok = 1; 1283 err: 1284 OPENSSL_free(tag); 1285 return ok; 1286 } 1287 1288 /* 1289 * Get RecipientInfo type (if any) supported by a key (public or private). To 1290 * retain compatibility with previous behaviour if the ctrl value isn't 1291 * supported we assume key transport. 1292 */ 1293 int ossl_cms_pkey_get_ri_type(EVP_PKEY *pk) 1294 { 1295 /* Check types that we know about */ 1296 if (EVP_PKEY_is_a(pk, "DH")) 1297 return CMS_RECIPINFO_AGREE; 1298 else if (EVP_PKEY_is_a(pk, "DHX")) 1299 return CMS_RECIPINFO_AGREE; 1300 else if (EVP_PKEY_is_a(pk, "DSA")) 1301 return CMS_RECIPINFO_NONE; 1302 else if (EVP_PKEY_is_a(pk, "EC")) 1303 return CMS_RECIPINFO_AGREE; 1304 else if (EVP_PKEY_is_a(pk, "RSA")) 1305 return CMS_RECIPINFO_TRANS; 1306 1307 /* 1308 * Otherwise this might ben an engine implementation, so see if we can get 1309 * the type from the ameth. 1310 */ 1311 if (pk->ameth && pk->ameth->pkey_ctrl) { 1312 int i, r; 1313 i = pk->ameth->pkey_ctrl(pk, ASN1_PKEY_CTRL_CMS_RI_TYPE, 0, &r); 1314 if (i > 0) 1315 return r; 1316 } 1317 return CMS_RECIPINFO_TRANS; 1318 } 1319 1320 int ossl_cms_pkey_is_ri_type_supported(EVP_PKEY *pk, int ri_type) 1321 { 1322 int supportedRiType; 1323 1324 if (pk->ameth != NULL && pk->ameth->pkey_ctrl != NULL) { 1325 int i, r; 1326 1327 i = pk->ameth->pkey_ctrl(pk, ASN1_PKEY_CTRL_CMS_IS_RI_TYPE_SUPPORTED, 1328 ri_type, &r); 1329 if (i > 0) 1330 return r; 1331 } 1332 1333 supportedRiType = ossl_cms_pkey_get_ri_type(pk); 1334 if (supportedRiType < 0) 1335 return 0; 1336 1337 return (supportedRiType == ri_type); 1338 } 1339