crypto/cms/cms_lib.c

   1 /*
   2  * Copyright 2008-2021 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 <openssl/asn1t.h>
  11 #include <openssl/x509v3.h>
  12 #include <openssl/err.h>
  13 #include <openssl/pem.h>
  14 #include <openssl/bio.h>
  15 #include <openssl/asn1.h>
  16 #include <openssl/cms.h>
  17 #include <openssl/cms.h>
  18 #include "internal/sizes.h"
  19 #include "crypto/x509.h"
  20 #include "cms_local.h"
  21
  22 static STACK_OF(CMS_CertificateChoices)
  23 **cms_get0_certificate_choices(CMS_ContentInfo *cms);
  24
  25 IMPLEMENT_ASN1_PRINT_FUNCTION(CMS_ContentInfo)
  26
  27 CMS_ContentInfo *d2i_CMS_ContentInfo(CMS_ContentInfo **a,
  28                                      const unsigned char **in, long len)
  29 {
  30     CMS_ContentInfo *ci;
  31     const CMS_CTX *ctx = ossl_cms_get0_cmsctx(a == NULL ? NULL : *a);
  32
  33     ci = (CMS_ContentInfo *)ASN1_item_d2i_ex((ASN1_VALUE **)a, in, len,
  34                                           (CMS_ContentInfo_it()),
  35                                           ossl_cms_ctx_get0_libctx(ctx),
  36                                           ossl_cms_ctx_get0_propq(ctx));
  37     if (ci != NULL)
  38         ossl_cms_resolve_libctx(ci);
  39     return ci;
  40 }
  41
  42 int i2d_CMS_ContentInfo(const CMS_ContentInfo *a, unsigned char **out)
  43 {
  44     return ASN1_item_i2d((const ASN1_VALUE *)a, out, (CMS_ContentInfo_it()));
  45 }
  46
  47 CMS_ContentInfo *CMS_ContentInfo_new_ex(OSSL_LIB_CTX *libctx, const char *propq)
  48 {
  49     CMS_ContentInfo *ci;
  50
  51     ci = (CMS_ContentInfo *)ASN1_item_new_ex(ASN1_ITEM_rptr(CMS_ContentInfo),
  52                                              libctx, propq);
  53     if (ci != NULL) {
  54         ci->ctx.libctx = libctx;
  55         ci->ctx.propq = NULL;
  56         if (propq != NULL) {
  57             ci->ctx.propq = OPENSSL_strdup(propq);
  58             if (ci->ctx.propq == NULL) {
  59                 CMS_ContentInfo_free(ci);
  60                 ci = NULL;
  61                 ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
  62             }
  63         }
  64     }
  65     return ci;
  66 }
  67
  68 CMS_ContentInfo *CMS_ContentInfo_new(void)
  69 {
  70     return CMS_ContentInfo_new_ex(NULL, NULL);
  71 }
  72
  73 void CMS_ContentInfo_free(CMS_ContentInfo *cms)
  74 {
  75     if (cms != NULL) {
  76         OPENSSL_free(cms->ctx.propq);
  77         ASN1_item_free((ASN1_VALUE *)cms, ASN1_ITEM_rptr(CMS_ContentInfo));
  78     }
  79 }
  80
  81 const CMS_CTX *ossl_cms_get0_cmsctx(const CMS_ContentInfo *cms)
  82 {
  83     return cms != NULL ? &cms->ctx : NULL;
  84 }
  85
  86 OSSL_LIB_CTX *ossl_cms_ctx_get0_libctx(const CMS_CTX *ctx)
  87 {
  88     return ctx != NULL ? ctx->libctx : NULL;
  89 }
  90
  91 const char *ossl_cms_ctx_get0_propq(const CMS_CTX *ctx)
  92 {
  93     return ctx != NULL ? ctx->propq : NULL;
  94 }
  95
  96 void ossl_cms_resolve_libctx(CMS_ContentInfo *ci)
  97 {
  98     int i;
  99     CMS_CertificateChoices *cch;
 100     STACK_OF(CMS_CertificateChoices) **pcerts;
 101     const CMS_CTX *ctx = ossl_cms_get0_cmsctx(ci);
 102     OSSL_LIB_CTX *libctx = ossl_cms_ctx_get0_libctx(ctx);
 103     const char *propq = ossl_cms_ctx_get0_propq(ctx);
 104
 105     ossl_cms_SignerInfos_set_cmsctx(ci);
 106     ossl_cms_RecipientInfos_set_cmsctx(ci);
 107
 108     pcerts = cms_get0_certificate_choices(ci);
 109     if (pcerts != NULL) {
 110         for (i = 0; i < sk_CMS_CertificateChoices_num(*pcerts); i++) {
 111             cch = sk_CMS_CertificateChoices_value(*pcerts, i);
 112             if (cch->type == CMS_CERTCHOICE_CERT)
 113                 ossl_x509_set0_libctx(cch->d.certificate, libctx, propq);
 114         }
 115     }
 116 }
 117
 118 const ASN1_OBJECT *CMS_get0_type(const CMS_ContentInfo *cms)
 119 {
 120     return cms->contentType;
 121 }
 122
 123 CMS_ContentInfo *ossl_cms_Data_create(OSSL_LIB_CTX *libctx, const char *propq)
 124 {
 125     CMS_ContentInfo *cms = CMS_ContentInfo_new_ex(libctx, propq);
 126
 127     if (cms != NULL) {
 128         cms->contentType = OBJ_nid2obj(NID_pkcs7_data);
 129         /* Never detached */
 130         CMS_set_detached(cms, 0);
 131     }
 132     return cms;
 133 }
 134
 135 BIO *ossl_cms_content_bio(CMS_ContentInfo *cms)
 136 {
 137     ASN1_OCTET_STRING **pos = CMS_get0_content(cms);
 138
 139     if (pos == NULL)
 140         return NULL;
 141     /* If content detached data goes nowhere: create NULL BIO */
 142     if (*pos == NULL)
 143         return BIO_new(BIO_s_null());
 144     /*
 145      * If content not detached and created return memory BIO
 146      */
 147     if (*pos == NULL || ((*pos)->flags == ASN1_STRING_FLAG_CONT))
 148         return BIO_new(BIO_s_mem());
 149     /* Else content was read in: return read only BIO for it */
 150     return BIO_new_mem_buf((*pos)->data, (*pos)->length);
 151 }
 152
 153 BIO *CMS_dataInit(CMS_ContentInfo *cms, BIO *icont)
 154 {
 155     BIO *cmsbio, *cont;
 156     if (icont)
 157         cont = icont;
 158     else
 159         cont = ossl_cms_content_bio(cms);
 160     if (!cont) {
 161         ERR_raise(ERR_LIB_CMS, CMS_R_NO_CONTENT);
 162         return NULL;
 163     }
 164     switch (OBJ_obj2nid(cms->contentType)) {
 165
 166     case NID_pkcs7_data:
 167         return cont;
 168
 169     case NID_pkcs7_signed:
 170         cmsbio = ossl_cms_SignedData_init_bio(cms);
 171         break;
 172
 173     case NID_pkcs7_digest:
 174         cmsbio = ossl_cms_DigestedData_init_bio(cms);
 175         break;
 176 #ifdef ZLIB
 177     case NID_id_smime_ct_compressedData:
 178         cmsbio = ossl_cms_CompressedData_init_bio(cms);
 179         break;
 180 #endif
 181
 182     case NID_pkcs7_encrypted:
 183         cmsbio = ossl_cms_EncryptedData_init_bio(cms);
 184         break;
 185
 186     case NID_pkcs7_enveloped:
 187         cmsbio = ossl_cms_EnvelopedData_init_bio(cms);
 188         break;
 189
 190     case NID_id_smime_ct_authEnvelopedData:
 191         cmsbio = ossl_cms_AuthEnvelopedData_init_bio(cms);
 192         break;
 193
 194     default:
 195         ERR_raise(ERR_LIB_CMS, CMS_R_UNSUPPORTED_TYPE);
 196         goto err;
 197     }
 198
 199     if (cmsbio)
 200         return BIO_push(cmsbio, cont);
 201 err:
 202     if (!icont)
 203         BIO_free(cont);
 204     return NULL;
 205
 206 }
 207
 208 /* unfortunately cannot constify SMIME_write_ASN1() due to this function */
 209 int CMS_dataFinal(CMS_ContentInfo *cms, BIO *cmsbio)
 210 {
 211     return ossl_cms_DataFinal(cms, cmsbio, NULL, 0);
 212 }
 213
 214 int ossl_cms_DataFinal(CMS_ContentInfo *cms, BIO *cmsbio,
 215                        const unsigned char *precomp_md,
 216                        unsigned int precomp_mdlen)
 217 {
 218     ASN1_OCTET_STRING **pos = CMS_get0_content(cms);
 219
 220     if (pos == NULL)
 221         return 0;
 222     /* If embedded content find memory BIO and set content */
 223     if (*pos && ((*pos)->flags & ASN1_STRING_FLAG_CONT)) {
 224         BIO *mbio;
 225         unsigned char *cont;
 226         long contlen;
 227         mbio = BIO_find_type(cmsbio, BIO_TYPE_MEM);
 228         if (!mbio) {
 229             ERR_raise(ERR_LIB_CMS, CMS_R_CONTENT_NOT_FOUND);
 230             return 0;
 231         }
 232         contlen = BIO_get_mem_data(mbio, &cont);
 233         /* Set bio as read only so its content can't be clobbered */
 234         BIO_set_flags(mbio, BIO_FLAGS_MEM_RDONLY);
 235         BIO_set_mem_eof_return(mbio, 0);
 236         ASN1_STRING_set0(*pos, cont, contlen);
 237         (*pos)->flags &= ~ASN1_STRING_FLAG_CONT;
 238     }
 239
 240     switch (OBJ_obj2nid(cms->contentType)) {
 241
 242     case NID_pkcs7_data:
 243     case NID_pkcs7_encrypted:
 244     case NID_id_smime_ct_compressedData:
 245         /* Nothing to do */
 246         return 1;
 247
 248     case NID_pkcs7_enveloped:
 249         return ossl_cms_EnvelopedData_final(cms, cmsbio);
 250
 251     case NID_id_smime_ct_authEnvelopedData:
 252         return ossl_cms_AuthEnvelopedData_final(cms, cmsbio);
 253
 254     case NID_pkcs7_signed:
 255         return ossl_cms_SignedData_final(cms, cmsbio, precomp_md, precomp_mdlen);
 256
 257     case NID_pkcs7_digest:
 258         return ossl_cms_DigestedData_do_final(cms, cmsbio, 0);
 259
 260     default:
 261         ERR_raise(ERR_LIB_CMS, CMS_R_UNSUPPORTED_TYPE);
 262         return 0;
 263     }
 264 }
 265
 266 /*
 267  * Return an OCTET STRING pointer to content. This allows it to be accessed
 268  * or set later.
 269  */
 270
 271 ASN1_OCTET_STRING **CMS_get0_content(CMS_ContentInfo *cms)
 272 {
 273     switch (OBJ_obj2nid(cms->contentType)) {
 274
 275     case NID_pkcs7_data:
 276         return &cms->d.data;
 277
 278     case NID_pkcs7_signed:
 279         return &cms->d.signedData->encapContentInfo->eContent;
 280
 281     case NID_pkcs7_enveloped:
 282         return &cms->d.envelopedData->encryptedContentInfo->encryptedContent;
 283
 284     case NID_pkcs7_digest:
 285         return &cms->d.digestedData->encapContentInfo->eContent;
 286
 287     case NID_pkcs7_encrypted:
 288         return &cms->d.encryptedData->encryptedContentInfo->encryptedContent;
 289
 290     case NID_id_smime_ct_authEnvelopedData:
 291         return &cms->d.authEnvelopedData->authEncryptedContentInfo
 292                                         ->encryptedContent;
 293
 294     case NID_id_smime_ct_authData:
 295         return &cms->d.authenticatedData->encapContentInfo->eContent;
 296
 297     case NID_id_smime_ct_compressedData:
 298         return &cms->d.compressedData->encapContentInfo->eContent;
 299
 300     default:
 301         if (cms->d.other->type == V_ASN1_OCTET_STRING)
 302             return &cms->d.other->value.octet_string;
 303         ERR_raise(ERR_LIB_CMS, CMS_R_UNSUPPORTED_CONTENT_TYPE);
 304         return NULL;
 305
 306     }
 307 }
 308
 309 /*
 310  * Return an ASN1_OBJECT pointer to content type. This allows it to be
 311  * accessed or set later.
 312  */
 313
 314 static ASN1_OBJECT **cms_get0_econtent_type(CMS_ContentInfo *cms)
 315 {
 316     switch (OBJ_obj2nid(cms->contentType)) {
 317
 318     case NID_pkcs7_signed:
 319         return &cms->d.signedData->encapContentInfo->eContentType;
 320
 321     case NID_pkcs7_enveloped:
 322         return &cms->d.envelopedData->encryptedContentInfo->contentType;
 323
 324     case NID_pkcs7_digest:
 325         return &cms->d.digestedData->encapContentInfo->eContentType;
 326
 327     case NID_pkcs7_encrypted:
 328         return &cms->d.encryptedData->encryptedContentInfo->contentType;
 329
 330     case NID_id_smime_ct_authEnvelopedData:
 331         return &cms->d.authEnvelopedData->authEncryptedContentInfo
 332                                         ->contentType;
 333     case NID_id_smime_ct_authData:
 334         return &cms->d.authenticatedData->encapContentInfo->eContentType;
 335
 336     case NID_id_smime_ct_compressedData:
 337         return &cms->d.compressedData->encapContentInfo->eContentType;
 338
 339     default:
 340         ERR_raise(ERR_LIB_CMS, CMS_R_UNSUPPORTED_CONTENT_TYPE);
 341         return NULL;
 342
 343     }
 344 }
 345
 346 const ASN1_OBJECT *CMS_get0_eContentType(CMS_ContentInfo *cms)
 347 {
 348     ASN1_OBJECT **petype;
 349     petype = cms_get0_econtent_type(cms);
 350     if (petype)
 351         return *petype;
 352     return NULL;
 353 }
 354
 355 int CMS_set1_eContentType(CMS_ContentInfo *cms, const ASN1_OBJECT *oid)
 356 {
 357     ASN1_OBJECT **petype, *etype;
 358
 359     petype = cms_get0_econtent_type(cms);
 360     if (petype == NULL)
 361         return 0;
 362     if (oid == NULL)
 363         return 1;
 364     etype = OBJ_dup(oid);
 365     if (etype == NULL)
 366         return 0;
 367     ASN1_OBJECT_free(*petype);
 368     *petype = etype;
 369     return 1;
 370 }
 371
 372 int CMS_is_detached(CMS_ContentInfo *cms)
 373 {
 374     ASN1_OCTET_STRING **pos;
 375
 376     pos = CMS_get0_content(cms);
 377     if (pos == NULL)
 378         return -1;
 379     if (*pos != NULL)
 380         return 0;
 381     return 1;
 382 }
 383
 384 int CMS_set_detached(CMS_ContentInfo *cms, int detached)
 385 {
 386     ASN1_OCTET_STRING **pos;
 387
 388     pos = CMS_get0_content(cms);
 389     if (pos == NULL)
 390         return 0;
 391     if (detached) {
 392         ASN1_OCTET_STRING_free(*pos);
 393         *pos = NULL;
 394         return 1;
 395     }
 396     if (*pos == NULL)
 397         *pos = ASN1_OCTET_STRING_new();
 398     if (*pos != NULL) {
 399         /*
 400          * NB: special flag to show content is created and not read in.
 401          */
 402         (*pos)->flags |= ASN1_STRING_FLAG_CONT;
 403         return 1;
 404     }
 405     ERR_raise(ERR_LIB_CMS, ERR_R_MALLOC_FAILURE);
 406     return 0;
 407 }
 408
 409 /* Create a digest BIO from an X509_ALGOR structure */
 410
 411 BIO *ossl_cms_DigestAlgorithm_init_bio(X509_ALGOR *digestAlgorithm,
 412                                        const CMS_CTX *ctx)
 413 {
 414     BIO *mdbio = NULL;
 415     const ASN1_OBJECT *digestoid;
 416     const EVP_MD *digest = NULL;
 417     EVP_MD *fetched_digest = NULL;
 418     char alg[OSSL_MAX_NAME_SIZE];
 419
 420     X509_ALGOR_get0(&digestoid, NULL, NULL, digestAlgorithm);
 421     OBJ_obj2txt(alg, sizeof(alg), digestoid, 0);
 422
 423     (void)ERR_set_mark();
 424     fetched_digest = EVP_MD_fetch(ossl_cms_ctx_get0_libctx(ctx), alg,
 425                                   ossl_cms_ctx_get0_propq(ctx));
 426
 427     if (fetched_digest != NULL)
 428         digest = fetched_digest;
 429     else
 430         digest = EVP_get_digestbyobj(digestoid);
 431     if (digest == NULL) {
 432         (void)ERR_clear_last_mark();
 433         ERR_raise(ERR_LIB_CMS, CMS_R_UNKNOWN_DIGEST_ALGORITHM);
 434         goto err;
 435     }
 436     (void)ERR_pop_to_mark();
 437
 438     mdbio = BIO_new(BIO_f_md());
 439     if (mdbio == NULL || !BIO_set_md(mdbio, digest)) {
 440         ERR_raise(ERR_LIB_CMS, CMS_R_MD_BIO_INIT_ERROR);
 441         goto err;
 442     }
 443     EVP_MD_free(fetched_digest);
 444     return mdbio;
 445  err:
 446     EVP_MD_free(fetched_digest);
 447     BIO_free(mdbio);
 448     return NULL;
 449 }
 450
 451 /* Locate a message digest content from a BIO chain based on SignerInfo */
 452
 453 int ossl_cms_DigestAlgorithm_find_ctx(EVP_MD_CTX *mctx, BIO *chain,
 454                                       X509_ALGOR *mdalg)
 455 {
 456     int nid;
 457     const ASN1_OBJECT *mdoid;
 458     X509_ALGOR_get0(&mdoid, NULL, NULL, mdalg);
 459     nid = OBJ_obj2nid(mdoid);
 460     /* Look for digest type to match signature */
 461     for (;;) {
 462         EVP_MD_CTX *mtmp;
 463         chain = BIO_find_type(chain, BIO_TYPE_MD);
 464         if (chain == NULL) {
 465             ERR_raise(ERR_LIB_CMS, CMS_R_NO_MATCHING_DIGEST);
 466             return 0;
 467         }
 468         BIO_get_md_ctx(chain, &mtmp);
 469         if (EVP_MD_CTX_get_type(mtmp) == nid
 470             /*
 471              * Workaround for broken implementations that use signature
 472              * algorithm OID instead of digest.
 473              */
 474             || EVP_MD_get_pkey_type(EVP_MD_CTX_get0_md(mtmp)) == nid)
 475             return EVP_MD_CTX_copy_ex(mctx, mtmp);
 476         chain = BIO_next(chain);
 477     }
 478 }
 479
 480 static STACK_OF(CMS_CertificateChoices)
 481 **cms_get0_certificate_choices(CMS_ContentInfo *cms)
 482 {
 483     switch (OBJ_obj2nid(cms->contentType)) {
 484
 485     case NID_pkcs7_signed:
 486         return &cms->d.signedData->certificates;
 487
 488     case NID_pkcs7_enveloped:
 489         if (cms->d.envelopedData->originatorInfo == NULL)
 490             return NULL;
 491         return &cms->d.envelopedData->originatorInfo->certificates;
 492
 493     case NID_id_smime_ct_authEnvelopedData:
 494         if (cms->d.authEnvelopedData->originatorInfo == NULL)
 495             return NULL;
 496         return &cms->d.authEnvelopedData->originatorInfo->certificates;
 497
 498     default:
 499         ERR_raise(ERR_LIB_CMS, CMS_R_UNSUPPORTED_CONTENT_TYPE);
 500         return NULL;
 501
 502     }
 503 }
 504
 505 CMS_CertificateChoices *CMS_add0_CertificateChoices(CMS_ContentInfo *cms)
 506 {
 507     STACK_OF(CMS_CertificateChoices) **pcerts;
 508     CMS_CertificateChoices *cch;
 509
 510     pcerts = cms_get0_certificate_choices(cms);
 511     if (pcerts == NULL)
 512         return NULL;
 513     if (*pcerts == NULL)
 514         *pcerts = sk_CMS_CertificateChoices_new_null();
 515     if (*pcerts == NULL)
 516         return NULL;
 517     cch = M_ASN1_new_of(CMS_CertificateChoices);
 518     if (!cch)
 519         return NULL;
 520     if (!sk_CMS_CertificateChoices_push(*pcerts, cch)) {
 521         M_ASN1_free_of(cch, CMS_CertificateChoices);
 522         return NULL;
 523     }
 524     return cch;
 525 }
 526
 527 int CMS_add0_cert(CMS_ContentInfo *cms, X509 *cert)
 528 {
 529     CMS_CertificateChoices *cch;
 530     STACK_OF(CMS_CertificateChoices) **pcerts;
 531     int i;
 532
 533     pcerts = cms_get0_certificate_choices(cms);
 534     if (pcerts == NULL)
 535         return 0;
 536     for (i = 0; i < sk_CMS_CertificateChoices_num(*pcerts); i++) {
 537         cch = sk_CMS_CertificateChoices_value(*pcerts, i);
 538         if (cch->type == CMS_CERTCHOICE_CERT) {
 539             if (!X509_cmp(cch->d.certificate, cert)) {
 540                 ERR_raise(ERR_LIB_CMS, CMS_R_CERTIFICATE_ALREADY_PRESENT);
 541                 return 0;
 542             }
 543         }
 544     }
 545     cch = CMS_add0_CertificateChoices(cms);
 546     if (!cch)
 547         return 0;
 548     cch->type = CMS_CERTCHOICE_CERT;
 549     cch->d.certificate = cert;
 550     return 1;
 551 }
 552
 553 int CMS_add1_cert(CMS_ContentInfo *cms, X509 *cert)
 554 {
 555     int r;
 556     r = CMS_add0_cert(cms, cert);
 557     if (r > 0)
 558         X509_up_ref(cert);
 559     return r;
 560 }
 561
 562 static STACK_OF(CMS_RevocationInfoChoice)
 563 **cms_get0_revocation_choices(CMS_ContentInfo *cms)
 564 {
 565     switch (OBJ_obj2nid(cms->contentType)) {
 566
 567     case NID_pkcs7_signed:
 568         return &cms->d.signedData->crls;
 569
 570     case NID_pkcs7_enveloped:
 571         if (cms->d.envelopedData->originatorInfo == NULL)
 572             return NULL;
 573         return &cms->d.envelopedData->originatorInfo->crls;
 574
 575     case NID_id_smime_ct_authEnvelopedData:
 576         if (cms->d.authEnvelopedData->originatorInfo == NULL)
 577             return NULL;
 578         return &cms->d.authEnvelopedData->originatorInfo->crls;
 579
 580     default:
 581         ERR_raise(ERR_LIB_CMS, CMS_R_UNSUPPORTED_CONTENT_TYPE);
 582         return NULL;
 583
 584     }
 585 }
 586
 587 CMS_RevocationInfoChoice *CMS_add0_RevocationInfoChoice(CMS_ContentInfo *cms)
 588 {
 589     STACK_OF(CMS_RevocationInfoChoice) **pcrls;
 590     CMS_RevocationInfoChoice *rch;
 591
 592     pcrls = cms_get0_revocation_choices(cms);
 593     if (pcrls == NULL)
 594         return NULL;
 595     if (*pcrls == NULL)
 596         *pcrls = sk_CMS_RevocationInfoChoice_new_null();
 597     if (*pcrls == NULL)
 598         return NULL;
 599     rch = M_ASN1_new_of(CMS_RevocationInfoChoice);
 600     if (rch == NULL)
 601         return NULL;
 602     if (!sk_CMS_RevocationInfoChoice_push(*pcrls, rch)) {
 603         M_ASN1_free_of(rch, CMS_RevocationInfoChoice);
 604         return NULL;
 605     }
 606     return rch;
 607 }
 608
 609 int CMS_add0_crl(CMS_ContentInfo *cms, X509_CRL *crl)
 610 {
 611     CMS_RevocationInfoChoice *rch;
 612     rch = CMS_add0_RevocationInfoChoice(cms);
 613     if (!rch)
 614         return 0;
 615     rch->type = CMS_REVCHOICE_CRL;
 616     rch->d.crl = crl;
 617     return 1;
 618 }
 619
 620 int CMS_add1_crl(CMS_ContentInfo *cms, X509_CRL *crl)
 621 {
 622     int r;
 623     r = CMS_add0_crl(cms, crl);
 624     if (r > 0)
 625         X509_CRL_up_ref(crl);
 626     return r;
 627 }
 628
 629 STACK_OF(X509) *CMS_get1_certs(CMS_ContentInfo *cms)
 630 {
 631     STACK_OF(X509) *certs = NULL;
 632     CMS_CertificateChoices *cch;
 633     STACK_OF(CMS_CertificateChoices) **pcerts;
 634     int i;
 635
 636     pcerts = cms_get0_certificate_choices(cms);
 637     if (pcerts == NULL)
 638         return NULL;
 639     for (i = 0; i < sk_CMS_CertificateChoices_num(*pcerts); i++) {
 640         cch = sk_CMS_CertificateChoices_value(*pcerts, i);
 641         if (cch->type == 0) {
 642             if (!ossl_x509_add_cert_new(&certs, cch->d.certificate,
 643                                         X509_ADD_FLAG_UP_REF)) {
 644                 OSSL_STACK_OF_X509_free(certs);
 645                 return NULL;
 646             }
 647         }
 648     }
 649     return certs;
 650
 651 }
 652
 653 STACK_OF(X509_CRL) *CMS_get1_crls(CMS_ContentInfo *cms)
 654 {
 655     STACK_OF(X509_CRL) *crls = NULL;
 656     STACK_OF(CMS_RevocationInfoChoice) **pcrls;
 657     CMS_RevocationInfoChoice *rch;
 658     int i;
 659
 660     pcrls = cms_get0_revocation_choices(cms);
 661     if (pcrls == NULL)
 662         return NULL;
 663     for (i = 0; i < sk_CMS_RevocationInfoChoice_num(*pcrls); i++) {
 664         rch = sk_CMS_RevocationInfoChoice_value(*pcrls, i);
 665         if (rch->type == 0) {
 666             if (!crls) {
 667                 crls = sk_X509_CRL_new_null();
 668                 if (!crls)
 669                     return NULL;
 670             }
 671             if (!sk_X509_CRL_push(crls, rch->d.crl)) {
 672                 sk_X509_CRL_pop_free(crls, X509_CRL_free);
 673                 return NULL;
 674             }
 675             X509_CRL_up_ref(rch->d.crl);
 676         }
 677     }
 678     return crls;
 679 }
 680
 681 int ossl_cms_ias_cert_cmp(CMS_IssuerAndSerialNumber *ias, X509 *cert)
 682 {
 683     int ret;
 684     ret = X509_NAME_cmp(ias->issuer, X509_get_issuer_name(cert));
 685     if (ret)
 686         return ret;
 687     return ASN1_INTEGER_cmp(ias->serialNumber, X509_get0_serialNumber(cert));
 688 }
 689
 690 int ossl_cms_keyid_cert_cmp(ASN1_OCTET_STRING *keyid, X509 *cert)
 691 {
 692     const ASN1_OCTET_STRING *cert_keyid = X509_get0_subject_key_id(cert);
 693
 694     if (cert_keyid == NULL)
 695         return -1;
 696     return ASN1_OCTET_STRING_cmp(keyid, cert_keyid);
 697 }
 698
 699 int ossl_cms_set1_ias(CMS_IssuerAndSerialNumber **pias, X509 *cert)
 700 {
 701     CMS_IssuerAndSerialNumber *ias;
 702     ias = M_ASN1_new_of(CMS_IssuerAndSerialNumber);
 703     if (!ias)
 704         goto err;
 705     if (!X509_NAME_set(&ias->issuer, X509_get_issuer_name(cert)))
 706         goto err;
 707     if (!ASN1_STRING_copy(ias->serialNumber, X509_get0_serialNumber(cert)))
 708         goto err;
 709     M_ASN1_free_of(*pias, CMS_IssuerAndSerialNumber);
 710     *pias = ias;
 711     return 1;
 712  err:
 713     M_ASN1_free_of(ias, CMS_IssuerAndSerialNumber);
 714     ERR_raise(ERR_LIB_CMS, ERR_R_MALLOC_FAILURE);
 715     return 0;
 716 }
 717
 718 int ossl_cms_set1_keyid(ASN1_OCTET_STRING **pkeyid, X509 *cert)
 719 {
 720     ASN1_OCTET_STRING *keyid = NULL;
 721     const ASN1_OCTET_STRING *cert_keyid;
 722     cert_keyid = X509_get0_subject_key_id(cert);
 723     if (cert_keyid == NULL) {
 724         ERR_raise(ERR_LIB_CMS, CMS_R_CERTIFICATE_HAS_NO_KEYID);
 725         return 0;
 726     }
 727     keyid = ASN1_STRING_dup(cert_keyid);
 728     if (!keyid) {
 729         ERR_raise(ERR_LIB_CMS, ERR_R_MALLOC_FAILURE);
 730         return 0;
 731     }
 732     ASN1_OCTET_STRING_free(*pkeyid);
 733     *pkeyid = keyid;
 734     return 1;
 735 }