1 /* crypto/cms/cms_lib.c */
3 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
6 /* ====================================================================
7 * Copyright (c) 2008 The OpenSSL Project. All rights reserved.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in
18 * the documentation and/or other materials provided with the
21 * 3. All advertising materials mentioning features or use of this
22 * software must display the following acknowledgment:
23 * "This product includes software developed by the OpenSSL Project
24 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
27 * endorse or promote products derived from this software without
28 * prior written permission. For written permission, please contact
29 * licensing@OpenSSL.org.
31 * 5. Products derived from this software may not be called "OpenSSL"
32 * nor may "OpenSSL" appear in their names without prior written
33 * permission of the OpenSSL Project.
35 * 6. Redistributions of any form whatsoever must retain the following
37 * "This product includes software developed by the OpenSSL Project
38 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
43 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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52 * ====================================================================
55 #include <openssl/asn1t.h>
56 #include <openssl/x509.h>
57 #include <openssl/err.h>
58 #include <openssl/pem.h>
59 #include <openssl/bio.h>
60 #include <openssl/asn1.h>
64 IMPLEMENT_ASN1_FUNCTIONS_const(CMS_ContentInfo)
66 DECLARE_ASN1_ITEM(CMS_CertificateChoices)
67 DECLARE_ASN1_ITEM(CMS_RevocationInfoChoice)
68 DECLARE_STACK_OF(CMS_CertificateChoices)
69 DECLARE_STACK_OF(CMS_RevocationInfoChoice)
71 const ASN1_OBJECT *CMS_get0_type(CMS_ContentInfo *cms)
73 return cms->contentType;
76 CMS_ContentInfo *cms_Data_create(void)
79 cms = CMS_ContentInfo_new();
81 cms->contentType = OBJ_nid2obj(NID_pkcs7_data);
83 CMS_set_detached(cms, 0);
88 BIO *cms_content_bio(CMS_ContentInfo *cms)
90 ASN1_OCTET_STRING **pos = CMS_get0_content(cms);
93 /* If content detached data goes nowhere: create NULL BIO */
95 return BIO_new(BIO_s_null());
97 * If content not detached and created return memory BIO
99 if (!*pos || ((*pos)->flags == ASN1_STRING_FLAG_CONT))
100 return BIO_new(BIO_s_mem());
101 /* Else content was read in: return read only BIO for it */
102 return BIO_new_mem_buf((*pos)->data, (*pos)->length);
105 BIO *CMS_dataInit(CMS_ContentInfo *cms, BIO *icont)
111 cont = cms_content_bio(cms);
113 CMSerr(CMS_F_CMS_DATAINIT, CMS_R_NO_CONTENT);
116 switch (OBJ_obj2nid(cms->contentType)) {
121 case NID_pkcs7_signed:
122 cmsbio = cms_SignedData_init_bio(cms);
125 case NID_pkcs7_digest:
126 cmsbio = cms_DigestedData_init_bio(cms);
129 case NID_id_smime_ct_compressedData:
130 cmsbio = cms_CompressedData_init_bio(cms);
134 case NID_pkcs7_encrypted:
135 cmsbio = cms_EncryptedData_init_bio(cms);
138 case NID_pkcs7_enveloped:
139 cmsbio = cms_EnvelopedData_init_bio(cms);
143 CMSerr(CMS_F_CMS_DATAINIT, CMS_R_UNSUPPORTED_TYPE);
148 return BIO_push(cmsbio, cont);
156 int CMS_dataFinal(CMS_ContentInfo *cms, BIO *cmsbio)
158 ASN1_OCTET_STRING **pos = CMS_get0_content(cms);
161 /* If ebmedded content find memory BIO and set content */
162 if (*pos && ((*pos)->flags & ASN1_STRING_FLAG_CONT)) {
166 mbio = BIO_find_type(cmsbio, BIO_TYPE_MEM);
168 CMSerr(CMS_F_CMS_DATAFINAL, CMS_R_CONTENT_NOT_FOUND);
171 contlen = BIO_get_mem_data(mbio, &cont);
172 /* Set bio as read only so its content can't be clobbered */
173 BIO_set_flags(mbio, BIO_FLAGS_MEM_RDONLY);
174 BIO_set_mem_eof_return(mbio, 0);
175 ASN1_STRING_set0(*pos, cont, contlen);
176 (*pos)->flags &= ~ASN1_STRING_FLAG_CONT;
179 switch (OBJ_obj2nid(cms->contentType)) {
182 case NID_pkcs7_enveloped:
183 case NID_pkcs7_encrypted:
184 case NID_id_smime_ct_compressedData:
188 case NID_pkcs7_signed:
189 return cms_SignedData_final(cms, cmsbio);
191 case NID_pkcs7_digest:
192 return cms_DigestedData_do_final(cms, cmsbio, 0);
195 CMSerr(CMS_F_CMS_DATAFINAL, CMS_R_UNSUPPORTED_TYPE);
201 * Return an OCTET STRING pointer to content. This allows it to be accessed
205 ASN1_OCTET_STRING **CMS_get0_content(CMS_ContentInfo *cms)
207 switch (OBJ_obj2nid(cms->contentType)) {
212 case NID_pkcs7_signed:
213 return &cms->d.signedData->encapContentInfo->eContent;
215 case NID_pkcs7_enveloped:
216 return &cms->d.envelopedData->encryptedContentInfo->encryptedContent;
218 case NID_pkcs7_digest:
219 return &cms->d.digestedData->encapContentInfo->eContent;
221 case NID_pkcs7_encrypted:
222 return &cms->d.encryptedData->encryptedContentInfo->encryptedContent;
224 case NID_id_smime_ct_authData:
225 return &cms->d.authenticatedData->encapContentInfo->eContent;
227 case NID_id_smime_ct_compressedData:
228 return &cms->d.compressedData->encapContentInfo->eContent;
231 if (cms->d.other->type == V_ASN1_OCTET_STRING)
232 return &cms->d.other->value.octet_string;
233 CMSerr(CMS_F_CMS_GET0_CONTENT, CMS_R_UNSUPPORTED_CONTENT_TYPE);
240 * Return an ASN1_OBJECT pointer to content type. This allows it to be
241 * accessed or set later.
244 static ASN1_OBJECT **cms_get0_econtent_type(CMS_ContentInfo *cms)
246 switch (OBJ_obj2nid(cms->contentType)) {
248 case NID_pkcs7_signed:
249 return &cms->d.signedData->encapContentInfo->eContentType;
251 case NID_pkcs7_enveloped:
252 return &cms->d.envelopedData->encryptedContentInfo->contentType;
254 case NID_pkcs7_digest:
255 return &cms->d.digestedData->encapContentInfo->eContentType;
257 case NID_pkcs7_encrypted:
258 return &cms->d.encryptedData->encryptedContentInfo->contentType;
260 case NID_id_smime_ct_authData:
261 return &cms->d.authenticatedData->encapContentInfo->eContentType;
263 case NID_id_smime_ct_compressedData:
264 return &cms->d.compressedData->encapContentInfo->eContentType;
267 CMSerr(CMS_F_CMS_GET0_ECONTENT_TYPE, CMS_R_UNSUPPORTED_CONTENT_TYPE);
273 const ASN1_OBJECT *CMS_get0_eContentType(CMS_ContentInfo *cms)
275 ASN1_OBJECT **petype;
276 petype = cms_get0_econtent_type(cms);
282 int CMS_set1_eContentType(CMS_ContentInfo *cms, const ASN1_OBJECT *oid)
284 ASN1_OBJECT **petype, *etype;
285 petype = cms_get0_econtent_type(cms);
290 etype = OBJ_dup(oid);
293 ASN1_OBJECT_free(*petype);
298 int CMS_is_detached(CMS_ContentInfo *cms)
300 ASN1_OCTET_STRING **pos;
301 pos = CMS_get0_content(cms);
309 int CMS_set_detached(CMS_ContentInfo *cms, int detached)
311 ASN1_OCTET_STRING **pos;
312 pos = CMS_get0_content(cms);
317 ASN1_OCTET_STRING_free(*pos);
323 *pos = ASN1_OCTET_STRING_new();
326 * NB: special flag to show content is created and not read in.
328 (*pos)->flags |= ASN1_STRING_FLAG_CONT;
331 CMSerr(CMS_F_CMS_SET_DETACHED, ERR_R_MALLOC_FAILURE);
335 /* Set up an X509_ALGOR DigestAlgorithmIdentifier from an EVP_MD */
337 void cms_DigestAlgorithm_set(X509_ALGOR *alg, const EVP_MD *md)
341 switch (EVP_MD_type(md)) {
347 param_type = V_ASN1_UNDEF;
351 param_type = V_ASN1_NULL;
355 X509_ALGOR_set0(alg, OBJ_nid2obj(EVP_MD_type(md)), param_type, NULL);
359 /* Create a digest BIO from an X509_ALGOR structure */
361 BIO *cms_DigestAlgorithm_init_bio(X509_ALGOR *digestAlgorithm)
364 ASN1_OBJECT *digestoid;
365 const EVP_MD *digest;
366 X509_ALGOR_get0(&digestoid, NULL, NULL, digestAlgorithm);
367 digest = EVP_get_digestbyobj(digestoid);
369 CMSerr(CMS_F_CMS_DIGESTALGORITHM_INIT_BIO,
370 CMS_R_UNKNOWN_DIGEST_ALGORIHM);
373 mdbio = BIO_new(BIO_f_md());
374 if (!mdbio || !BIO_set_md(mdbio, digest)) {
375 CMSerr(CMS_F_CMS_DIGESTALGORITHM_INIT_BIO, CMS_R_MD_BIO_INIT_ERROR);
385 /* Locate a message digest content from a BIO chain based on SignerInfo */
387 int cms_DigestAlgorithm_find_ctx(EVP_MD_CTX *mctx, BIO *chain,
392 X509_ALGOR_get0(&mdoid, NULL, NULL, mdalg);
393 nid = OBJ_obj2nid(mdoid);
394 /* Look for digest type to match signature */
397 chain = BIO_find_type(chain, BIO_TYPE_MD);
399 CMSerr(CMS_F_CMS_DIGESTALGORITHM_FIND_CTX,
400 CMS_R_NO_MATCHING_DIGEST);
403 BIO_get_md_ctx(chain, &mtmp);
404 if (EVP_MD_CTX_type(mtmp) == nid
406 * Workaround for broken implementations that use signature
407 * algorithm OID instead of digest.
409 || EVP_MD_pkey_type(EVP_MD_CTX_md(mtmp)) == nid) {
410 EVP_MD_CTX_copy_ex(mctx, mtmp);
413 chain = BIO_next(chain);
417 static STACK_OF(CMS_CertificateChoices)
418 **cms_get0_certificate_choices(CMS_ContentInfo *cms)
420 switch (OBJ_obj2nid(cms->contentType)) {
422 case NID_pkcs7_signed:
423 return &cms->d.signedData->certificates;
425 case NID_pkcs7_enveloped:
426 return &cms->d.envelopedData->originatorInfo->certificates;
429 CMSerr(CMS_F_CMS_GET0_CERTIFICATE_CHOICES,
430 CMS_R_UNSUPPORTED_CONTENT_TYPE);
436 CMS_CertificateChoices *CMS_add0_CertificateChoices(CMS_ContentInfo *cms)
438 STACK_OF(CMS_CertificateChoices) **pcerts;
439 CMS_CertificateChoices *cch;
440 pcerts = cms_get0_certificate_choices(cms);
444 *pcerts = sk_CMS_CertificateChoices_new_null();
447 cch = M_ASN1_new_of(CMS_CertificateChoices);
450 if (!sk_CMS_CertificateChoices_push(*pcerts, cch)) {
451 M_ASN1_free_of(cch, CMS_CertificateChoices);
457 int CMS_add0_cert(CMS_ContentInfo *cms, X509 *cert)
459 CMS_CertificateChoices *cch;
460 STACK_OF(CMS_CertificateChoices) **pcerts;
462 pcerts = cms_get0_certificate_choices(cms);
465 for (i = 0; i < sk_CMS_CertificateChoices_num(*pcerts); i++) {
466 cch = sk_CMS_CertificateChoices_value(*pcerts, i);
467 if (cch->type == CMS_CERTCHOICE_CERT) {
468 if (!X509_cmp(cch->d.certificate, cert)) {
469 CMSerr(CMS_F_CMS_ADD0_CERT,
470 CMS_R_CERTIFICATE_ALREADY_PRESENT);
475 cch = CMS_add0_CertificateChoices(cms);
478 cch->type = CMS_CERTCHOICE_CERT;
479 cch->d.certificate = cert;
483 int CMS_add1_cert(CMS_ContentInfo *cms, X509 *cert)
486 r = CMS_add0_cert(cms, cert);
488 CRYPTO_add(&cert->references, 1, CRYPTO_LOCK_X509);
492 static STACK_OF(CMS_RevocationInfoChoice)
493 **cms_get0_revocation_choices(CMS_ContentInfo *cms)
495 switch (OBJ_obj2nid(cms->contentType)) {
497 case NID_pkcs7_signed:
498 return &cms->d.signedData->crls;
500 case NID_pkcs7_enveloped:
501 return &cms->d.envelopedData->originatorInfo->crls;
504 CMSerr(CMS_F_CMS_GET0_REVOCATION_CHOICES,
505 CMS_R_UNSUPPORTED_CONTENT_TYPE);
511 CMS_RevocationInfoChoice *CMS_add0_RevocationInfoChoice(CMS_ContentInfo *cms)
513 STACK_OF(CMS_RevocationInfoChoice) **pcrls;
514 CMS_RevocationInfoChoice *rch;
515 pcrls = cms_get0_revocation_choices(cms);
519 *pcrls = sk_CMS_RevocationInfoChoice_new_null();
522 rch = M_ASN1_new_of(CMS_RevocationInfoChoice);
525 if (!sk_CMS_RevocationInfoChoice_push(*pcrls, rch)) {
526 M_ASN1_free_of(rch, CMS_RevocationInfoChoice);
532 int CMS_add0_crl(CMS_ContentInfo *cms, X509_CRL *crl)
534 CMS_RevocationInfoChoice *rch;
535 rch = CMS_add0_RevocationInfoChoice(cms);
538 rch->type = CMS_REVCHOICE_CRL;
543 STACK_OF(X509) *CMS_get1_certs(CMS_ContentInfo *cms)
545 STACK_OF(X509) *certs = NULL;
546 CMS_CertificateChoices *cch;
547 STACK_OF(CMS_CertificateChoices) **pcerts;
549 pcerts = cms_get0_certificate_choices(cms);
552 for (i = 0; i < sk_CMS_CertificateChoices_num(*pcerts); i++) {
553 cch = sk_CMS_CertificateChoices_value(*pcerts, i);
554 if (cch->type == 0) {
556 certs = sk_X509_new_null();
560 if (!sk_X509_push(certs, cch->d.certificate)) {
561 sk_X509_pop_free(certs, X509_free);
564 CRYPTO_add(&cch->d.certificate->references, 1, CRYPTO_LOCK_X509);
571 STACK_OF(X509_CRL) *CMS_get1_crls(CMS_ContentInfo *cms)
573 STACK_OF(X509_CRL) *crls = NULL;
574 STACK_OF(CMS_RevocationInfoChoice) **pcrls;
575 CMS_RevocationInfoChoice *rch;
577 pcrls = cms_get0_revocation_choices(cms);
580 for (i = 0; i < sk_CMS_RevocationInfoChoice_num(*pcrls); i++) {
581 rch = sk_CMS_RevocationInfoChoice_value(*pcrls, i);
582 if (rch->type == 0) {
584 crls = sk_X509_CRL_new_null();
588 if (!sk_X509_CRL_push(crls, rch->d.crl)) {
589 sk_X509_CRL_pop_free(crls, X509_CRL_free);
592 CRYPTO_add(&rch->d.crl->references, 1, CRYPTO_LOCK_X509_CRL);