2 * Copyright 2008-2022 The OpenSSL Project Authors. All Rights Reserved.
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
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"
22 static STACK_OF(CMS_CertificateChoices)
23 **cms_get0_certificate_choices(CMS_ContentInfo *cms);
25 IMPLEMENT_ASN1_PRINT_FUNCTION(CMS_ContentInfo)
27 CMS_ContentInfo *d2i_CMS_ContentInfo(CMS_ContentInfo **a,
28 const unsigned char **in, long len)
31 const CMS_CTX *ctx = ossl_cms_get0_cmsctx(a == NULL ? NULL : *a);
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));
38 ossl_cms_resolve_libctx(ci);
42 int i2d_CMS_ContentInfo(const CMS_ContentInfo *a, unsigned char **out)
44 return ASN1_item_i2d((const ASN1_VALUE *)a, out, (CMS_ContentInfo_it()));
47 CMS_ContentInfo *CMS_ContentInfo_new_ex(OSSL_LIB_CTX *libctx, const char *propq)
51 ci = (CMS_ContentInfo *)ASN1_item_new_ex(ASN1_ITEM_rptr(CMS_ContentInfo),
54 ci->ctx.libctx = libctx;
57 ci->ctx.propq = OPENSSL_strdup(propq);
58 if (ci->ctx.propq == NULL) {
59 CMS_ContentInfo_free(ci);
61 ERR_raise(ERR_LIB_PROV, ERR_R_MALLOC_FAILURE);
68 CMS_ContentInfo *CMS_ContentInfo_new(void)
70 return CMS_ContentInfo_new_ex(NULL, NULL);
73 void CMS_ContentInfo_free(CMS_ContentInfo *cms)
76 OPENSSL_free(cms->ctx.propq);
77 ASN1_item_free((ASN1_VALUE *)cms, ASN1_ITEM_rptr(CMS_ContentInfo));
81 const CMS_CTX *ossl_cms_get0_cmsctx(const CMS_ContentInfo *cms)
83 return cms != NULL ? &cms->ctx : NULL;
86 OSSL_LIB_CTX *ossl_cms_ctx_get0_libctx(const CMS_CTX *ctx)
88 return ctx != NULL ? ctx->libctx : NULL;
91 const char *ossl_cms_ctx_get0_propq(const CMS_CTX *ctx)
93 return ctx != NULL ? ctx->propq : NULL;
96 void ossl_cms_resolve_libctx(CMS_ContentInfo *ci)
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);
105 ossl_cms_SignerInfos_set_cmsctx(ci);
106 ossl_cms_RecipientInfos_set_cmsctx(ci);
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);
118 const ASN1_OBJECT *CMS_get0_type(const CMS_ContentInfo *cms)
120 return cms->contentType;
123 CMS_ContentInfo *ossl_cms_Data_create(OSSL_LIB_CTX *libctx, const char *propq)
125 CMS_ContentInfo *cms = CMS_ContentInfo_new_ex(libctx, propq);
128 cms->contentType = OBJ_nid2obj(NID_pkcs7_data);
130 CMS_set_detached(cms, 0);
135 BIO *ossl_cms_content_bio(CMS_ContentInfo *cms)
137 ASN1_OCTET_STRING **pos = CMS_get0_content(cms);
141 /* If content detached data goes nowhere: create NULL BIO */
143 return BIO_new(BIO_s_null());
145 * If content not detached and created return memory BIO
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);
153 BIO *CMS_dataInit(CMS_ContentInfo *cms, BIO *icont)
159 cont = ossl_cms_content_bio(cms);
161 ERR_raise(ERR_LIB_CMS, CMS_R_NO_CONTENT);
164 switch (OBJ_obj2nid(cms->contentType)) {
169 case NID_pkcs7_signed:
170 cmsbio = ossl_cms_SignedData_init_bio(cms);
173 case NID_pkcs7_digest:
174 cmsbio = ossl_cms_DigestedData_init_bio(cms);
177 case NID_id_smime_ct_compressedData:
178 cmsbio = ossl_cms_CompressedData_init_bio(cms);
182 case NID_pkcs7_encrypted:
183 cmsbio = ossl_cms_EncryptedData_init_bio(cms);
186 case NID_pkcs7_enveloped:
187 cmsbio = ossl_cms_EnvelopedData_init_bio(cms);
190 case NID_id_smime_ct_authEnvelopedData:
191 cmsbio = ossl_cms_AuthEnvelopedData_init_bio(cms);
195 ERR_raise(ERR_LIB_CMS, CMS_R_UNSUPPORTED_TYPE);
200 return BIO_push(cmsbio, cont);
208 /* unfortunately cannot constify SMIME_write_ASN1() due to this function */
209 int CMS_dataFinal(CMS_ContentInfo *cms, BIO *cmsbio)
211 return ossl_cms_DataFinal(cms, cmsbio, NULL, 0);
214 int ossl_cms_DataFinal(CMS_ContentInfo *cms, BIO *cmsbio,
215 const unsigned char *precomp_md,
216 unsigned int precomp_mdlen)
218 ASN1_OCTET_STRING **pos = CMS_get0_content(cms);
222 /* If embedded content find memory BIO and set content */
223 if (*pos && ((*pos)->flags & ASN1_STRING_FLAG_CONT)) {
227 mbio = BIO_find_type(cmsbio, BIO_TYPE_MEM);
229 ERR_raise(ERR_LIB_CMS, CMS_R_CONTENT_NOT_FOUND);
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;
240 switch (OBJ_obj2nid(cms->contentType)) {
243 case NID_pkcs7_encrypted:
244 case NID_id_smime_ct_compressedData:
248 case NID_pkcs7_enveloped:
249 return ossl_cms_EnvelopedData_final(cms, cmsbio);
251 case NID_id_smime_ct_authEnvelopedData:
252 return ossl_cms_AuthEnvelopedData_final(cms, cmsbio);
254 case NID_pkcs7_signed:
255 return ossl_cms_SignedData_final(cms, cmsbio, precomp_md, precomp_mdlen);
257 case NID_pkcs7_digest:
258 return ossl_cms_DigestedData_do_final(cms, cmsbio, 0);
261 ERR_raise(ERR_LIB_CMS, CMS_R_UNSUPPORTED_TYPE);
267 * Return an OCTET STRING pointer to content. This allows it to be accessed
271 ASN1_OCTET_STRING **CMS_get0_content(CMS_ContentInfo *cms)
273 switch (OBJ_obj2nid(cms->contentType)) {
278 case NID_pkcs7_signed:
279 return &cms->d.signedData->encapContentInfo->eContent;
281 case NID_pkcs7_enveloped:
282 return &cms->d.envelopedData->encryptedContentInfo->encryptedContent;
284 case NID_pkcs7_digest:
285 return &cms->d.digestedData->encapContentInfo->eContent;
287 case NID_pkcs7_encrypted:
288 return &cms->d.encryptedData->encryptedContentInfo->encryptedContent;
290 case NID_id_smime_ct_authEnvelopedData:
291 return &cms->d.authEnvelopedData->authEncryptedContentInfo
294 case NID_id_smime_ct_authData:
295 return &cms->d.authenticatedData->encapContentInfo->eContent;
297 case NID_id_smime_ct_compressedData:
298 return &cms->d.compressedData->encapContentInfo->eContent;
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);
310 * Return an ASN1_OBJECT pointer to content type. This allows it to be
311 * accessed or set later.
314 static ASN1_OBJECT **cms_get0_econtent_type(CMS_ContentInfo *cms)
316 switch (OBJ_obj2nid(cms->contentType)) {
318 case NID_pkcs7_signed:
319 return &cms->d.signedData->encapContentInfo->eContentType;
321 case NID_pkcs7_enveloped:
322 return &cms->d.envelopedData->encryptedContentInfo->contentType;
324 case NID_pkcs7_digest:
325 return &cms->d.digestedData->encapContentInfo->eContentType;
327 case NID_pkcs7_encrypted:
328 return &cms->d.encryptedData->encryptedContentInfo->contentType;
330 case NID_id_smime_ct_authEnvelopedData:
331 return &cms->d.authEnvelopedData->authEncryptedContentInfo
333 case NID_id_smime_ct_authData:
334 return &cms->d.authenticatedData->encapContentInfo->eContentType;
336 case NID_id_smime_ct_compressedData:
337 return &cms->d.compressedData->encapContentInfo->eContentType;
340 ERR_raise(ERR_LIB_CMS, CMS_R_UNSUPPORTED_CONTENT_TYPE);
346 const ASN1_OBJECT *CMS_get0_eContentType(CMS_ContentInfo *cms)
348 ASN1_OBJECT **petype;
349 petype = cms_get0_econtent_type(cms);
355 int CMS_set1_eContentType(CMS_ContentInfo *cms, const ASN1_OBJECT *oid)
357 ASN1_OBJECT **petype, *etype;
359 petype = cms_get0_econtent_type(cms);
364 etype = OBJ_dup(oid);
367 ASN1_OBJECT_free(*petype);
372 int CMS_is_detached(CMS_ContentInfo *cms)
374 ASN1_OCTET_STRING **pos;
376 pos = CMS_get0_content(cms);
384 int CMS_set_detached(CMS_ContentInfo *cms, int detached)
386 ASN1_OCTET_STRING **pos;
388 pos = CMS_get0_content(cms);
392 ASN1_OCTET_STRING_free(*pos);
397 *pos = ASN1_OCTET_STRING_new();
400 * NB: special flag to show content is created and not read in.
402 (*pos)->flags |= ASN1_STRING_FLAG_CONT;
405 ERR_raise(ERR_LIB_CMS, ERR_R_MALLOC_FAILURE);
409 /* Create a digest BIO from an X509_ALGOR structure */
411 BIO *ossl_cms_DigestAlgorithm_init_bio(X509_ALGOR *digestAlgorithm,
415 const ASN1_OBJECT *digestoid;
416 const EVP_MD *digest = NULL;
417 EVP_MD *fetched_digest = NULL;
418 char alg[OSSL_MAX_NAME_SIZE];
420 X509_ALGOR_get0(&digestoid, NULL, NULL, digestAlgorithm);
421 OBJ_obj2txt(alg, sizeof(alg), digestoid, 0);
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));
427 if (fetched_digest != NULL)
428 digest = fetched_digest;
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);
436 (void)ERR_pop_to_mark();
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);
443 EVP_MD_free(fetched_digest);
446 EVP_MD_free(fetched_digest);
451 /* Locate a message digest content from a BIO chain based on SignerInfo */
453 int ossl_cms_DigestAlgorithm_find_ctx(EVP_MD_CTX *mctx, BIO *chain,
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 */
463 chain = BIO_find_type(chain, BIO_TYPE_MD);
465 ERR_raise(ERR_LIB_CMS, CMS_R_NO_MATCHING_DIGEST);
468 BIO_get_md_ctx(chain, &mtmp);
469 if (EVP_MD_CTX_get_type(mtmp) == nid
471 * Workaround for broken implementations that use signature
472 * algorithm OID instead of digest.
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);
480 static STACK_OF(CMS_CertificateChoices)
481 **cms_get0_certificate_choices(CMS_ContentInfo *cms)
483 switch (OBJ_obj2nid(cms->contentType)) {
485 case NID_pkcs7_signed:
486 return &cms->d.signedData->certificates;
488 case NID_pkcs7_enveloped:
489 if (cms->d.envelopedData->originatorInfo == NULL)
491 return &cms->d.envelopedData->originatorInfo->certificates;
493 case NID_id_smime_ct_authEnvelopedData:
494 if (cms->d.authEnvelopedData->originatorInfo == NULL)
496 return &cms->d.authEnvelopedData->originatorInfo->certificates;
499 ERR_raise(ERR_LIB_CMS, CMS_R_UNSUPPORTED_CONTENT_TYPE);
505 CMS_CertificateChoices *CMS_add0_CertificateChoices(CMS_ContentInfo *cms)
507 STACK_OF(CMS_CertificateChoices) **pcerts;
508 CMS_CertificateChoices *cch;
510 pcerts = cms_get0_certificate_choices(cms);
514 *pcerts = sk_CMS_CertificateChoices_new_null();
517 cch = M_ASN1_new_of(CMS_CertificateChoices);
520 if (!sk_CMS_CertificateChoices_push(*pcerts, cch)) {
521 M_ASN1_free_of(cch, CMS_CertificateChoices);
527 int CMS_add0_cert(CMS_ContentInfo *cms, X509 *cert)
529 CMS_CertificateChoices *cch;
530 STACK_OF(CMS_CertificateChoices) **pcerts;
533 pcerts = cms_get0_certificate_choices(cms);
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);
545 cch = CMS_add0_CertificateChoices(cms);
548 cch->type = CMS_CERTCHOICE_CERT;
549 cch->d.certificate = cert;
553 int CMS_add1_cert(CMS_ContentInfo *cms, X509 *cert)
556 r = CMS_add0_cert(cms, cert);
562 static STACK_OF(CMS_RevocationInfoChoice)
563 **cms_get0_revocation_choices(CMS_ContentInfo *cms)
565 switch (OBJ_obj2nid(cms->contentType)) {
567 case NID_pkcs7_signed:
568 return &cms->d.signedData->crls;
570 case NID_pkcs7_enveloped:
571 if (cms->d.envelopedData->originatorInfo == NULL)
573 return &cms->d.envelopedData->originatorInfo->crls;
575 case NID_id_smime_ct_authEnvelopedData:
576 if (cms->d.authEnvelopedData->originatorInfo == NULL)
578 return &cms->d.authEnvelopedData->originatorInfo->crls;
581 ERR_raise(ERR_LIB_CMS, CMS_R_UNSUPPORTED_CONTENT_TYPE);
587 CMS_RevocationInfoChoice *CMS_add0_RevocationInfoChoice(CMS_ContentInfo *cms)
589 STACK_OF(CMS_RevocationInfoChoice) **pcrls;
590 CMS_RevocationInfoChoice *rch;
592 pcrls = cms_get0_revocation_choices(cms);
596 *pcrls = sk_CMS_RevocationInfoChoice_new_null();
599 rch = M_ASN1_new_of(CMS_RevocationInfoChoice);
602 if (!sk_CMS_RevocationInfoChoice_push(*pcrls, rch)) {
603 M_ASN1_free_of(rch, CMS_RevocationInfoChoice);
609 int CMS_add0_crl(CMS_ContentInfo *cms, X509_CRL *crl)
611 CMS_RevocationInfoChoice *rch;
612 rch = CMS_add0_RevocationInfoChoice(cms);
615 rch->type = CMS_REVCHOICE_CRL;
620 int CMS_add1_crl(CMS_ContentInfo *cms, X509_CRL *crl)
623 r = CMS_add0_crl(cms, crl);
625 X509_CRL_up_ref(crl);
629 STACK_OF(X509) *CMS_get1_certs(CMS_ContentInfo *cms)
631 STACK_OF(X509) *certs = NULL;
632 CMS_CertificateChoices *cch;
633 STACK_OF(CMS_CertificateChoices) **pcerts;
636 pcerts = cms_get0_certificate_choices(cms);
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);
653 STACK_OF(X509_CRL) *CMS_get1_crls(CMS_ContentInfo *cms)
655 STACK_OF(X509_CRL) *crls = NULL;
656 STACK_OF(CMS_RevocationInfoChoice) **pcrls;
657 CMS_RevocationInfoChoice *rch;
660 pcrls = cms_get0_revocation_choices(cms);
663 for (i = 0; i < sk_CMS_RevocationInfoChoice_num(*pcrls); i++) {
664 rch = sk_CMS_RevocationInfoChoice_value(*pcrls, i);
665 if (rch->type == 0) {
667 crls = sk_X509_CRL_new_null();
671 if (!sk_X509_CRL_push(crls, rch->d.crl)) {
672 sk_X509_CRL_pop_free(crls, X509_CRL_free);
675 X509_CRL_up_ref(rch->d.crl);
681 int ossl_cms_ias_cert_cmp(CMS_IssuerAndSerialNumber *ias, X509 *cert)
684 ret = X509_NAME_cmp(ias->issuer, X509_get_issuer_name(cert));
687 return ASN1_INTEGER_cmp(ias->serialNumber, X509_get0_serialNumber(cert));
690 int ossl_cms_keyid_cert_cmp(ASN1_OCTET_STRING *keyid, X509 *cert)
692 const ASN1_OCTET_STRING *cert_keyid = X509_get0_subject_key_id(cert);
694 if (cert_keyid == NULL)
696 return ASN1_OCTET_STRING_cmp(keyid, cert_keyid);
699 int ossl_cms_set1_ias(CMS_IssuerAndSerialNumber **pias, X509 *cert)
701 CMS_IssuerAndSerialNumber *ias;
702 ias = M_ASN1_new_of(CMS_IssuerAndSerialNumber);
705 if (!X509_NAME_set(&ias->issuer, X509_get_issuer_name(cert)))
707 if (!ASN1_STRING_copy(ias->serialNumber, X509_get0_serialNumber(cert)))
709 M_ASN1_free_of(*pias, CMS_IssuerAndSerialNumber);
713 M_ASN1_free_of(ias, CMS_IssuerAndSerialNumber);
714 ERR_raise(ERR_LIB_CMS, ERR_R_MALLOC_FAILURE);
718 int ossl_cms_set1_keyid(ASN1_OCTET_STRING **pkeyid, X509 *cert)
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);
727 keyid = ASN1_STRING_dup(cert_keyid);
729 ERR_raise(ERR_LIB_CMS, ERR_R_MALLOC_FAILURE);
732 ASN1_OCTET_STRING_free(*pkeyid);