1 /* crypto/cms/cms_smime.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;
47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
49 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
51 * OF THE POSSIBILITY OF SUCH DAMAGE.
52 * ====================================================================
55 #include "internal/cryptlib.h"
56 #include <openssl/asn1t.h>
57 #include <openssl/x509.h>
58 #include <openssl/x509v3.h>
59 #include <openssl/err.h>
60 #include <openssl/cms.h>
62 #include "internal/asn1_int.h"
64 static BIO *cms_get_text_bio(BIO *out, unsigned int flags)
68 rbio = BIO_new(BIO_s_null());
69 else if (flags & CMS_TEXT) {
70 rbio = BIO_new(BIO_s_mem());
71 BIO_set_mem_eof_return(rbio, 0);
77 static int cms_copy_content(BIO *out, BIO *in, unsigned int flags)
79 unsigned char buf[4096];
83 tmpout = cms_get_text_bio(out, flags);
86 CMSerr(CMS_F_CMS_COPY_CONTENT, ERR_R_MALLOC_FAILURE);
90 /* Read all content through chain to process digest, decrypt etc */
92 i = BIO_read(in, buf, sizeof(buf));
94 if (BIO_method_type(in) == BIO_TYPE_CIPHER) {
95 if (!BIO_get_cipher_status(in))
103 if (tmpout && (BIO_write(tmpout, buf, i) != i))
107 if (flags & CMS_TEXT) {
108 if (!SMIME_text(tmpout, out)) {
109 CMSerr(CMS_F_CMS_COPY_CONTENT, CMS_R_SMIME_TEXT_ERROR);
123 static int check_content(CMS_ContentInfo *cms)
125 ASN1_OCTET_STRING **pos = CMS_get0_content(cms);
127 CMSerr(CMS_F_CHECK_CONTENT, CMS_R_NO_CONTENT);
133 static void do_free_upto(BIO *f, BIO *upto)
142 while (f && f != upto);
147 int CMS_data(CMS_ContentInfo *cms, BIO *out, unsigned int flags)
151 if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_data) {
152 CMSerr(CMS_F_CMS_DATA, CMS_R_TYPE_NOT_DATA);
155 cont = CMS_dataInit(cms, NULL);
158 r = cms_copy_content(out, cont, flags);
163 CMS_ContentInfo *CMS_data_create(BIO *in, unsigned int flags)
165 CMS_ContentInfo *cms;
166 cms = cms_Data_create();
170 if ((flags & CMS_STREAM) || CMS_final(cms, in, NULL, flags))
173 CMS_ContentInfo_free(cms);
178 int CMS_digest_verify(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
183 if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_digest) {
184 CMSerr(CMS_F_CMS_DIGEST_VERIFY, CMS_R_TYPE_NOT_DIGESTED_DATA);
188 if (!dcont && !check_content(cms))
191 cont = CMS_dataInit(cms, dcont);
194 r = cms_copy_content(out, cont, flags);
196 r = cms_DigestedData_do_final(cms, cont, 1);
197 do_free_upto(cont, dcont);
201 CMS_ContentInfo *CMS_digest_create(BIO *in, const EVP_MD *md,
204 CMS_ContentInfo *cms;
207 cms = cms_DigestedData_create(md);
211 if (!(flags & CMS_DETACHED))
212 CMS_set_detached(cms, 0);
214 if ((flags & CMS_STREAM) || CMS_final(cms, in, NULL, flags))
217 CMS_ContentInfo_free(cms);
221 int CMS_EncryptedData_decrypt(CMS_ContentInfo *cms,
222 const unsigned char *key, size_t keylen,
223 BIO *dcont, BIO *out, unsigned int flags)
227 if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_encrypted) {
228 CMSerr(CMS_F_CMS_ENCRYPTEDDATA_DECRYPT,
229 CMS_R_TYPE_NOT_ENCRYPTED_DATA);
233 if (!dcont && !check_content(cms))
236 if (CMS_EncryptedData_set1_key(cms, NULL, key, keylen) <= 0)
238 cont = CMS_dataInit(cms, dcont);
241 r = cms_copy_content(out, cont, flags);
242 do_free_upto(cont, dcont);
246 CMS_ContentInfo *CMS_EncryptedData_encrypt(BIO *in, const EVP_CIPHER *cipher,
247 const unsigned char *key,
248 size_t keylen, unsigned int flags)
250 CMS_ContentInfo *cms;
252 CMSerr(CMS_F_CMS_ENCRYPTEDDATA_ENCRYPT, CMS_R_NO_CIPHER);
255 cms = CMS_ContentInfo_new();
258 if (!CMS_EncryptedData_set1_key(cms, cipher, key, keylen))
261 if (!(flags & CMS_DETACHED))
262 CMS_set_detached(cms, 0);
264 if ((flags & (CMS_STREAM | CMS_PARTIAL))
265 || CMS_final(cms, in, NULL, flags))
268 CMS_ContentInfo_free(cms);
272 static int cms_signerinfo_verify_cert(CMS_SignerInfo *si,
274 STACK_OF(X509) *certs,
275 STACK_OF(X509_CRL) *crls,
281 CMS_SignerInfo_get0_algs(si, NULL, &signer, NULL, NULL);
282 if (!X509_STORE_CTX_init(&ctx, store, signer, certs)) {
283 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CERT, CMS_R_STORE_INIT_ERROR);
286 X509_STORE_CTX_set_default(&ctx, "smime_sign");
288 X509_STORE_CTX_set0_crls(&ctx, crls);
290 i = X509_verify_cert(&ctx);
292 j = X509_STORE_CTX_get_error(&ctx);
293 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CERT,
294 CMS_R_CERTIFICATE_VERIFY_ERROR);
295 ERR_add_error_data(2, "Verify error:",
296 X509_verify_cert_error_string(j));
301 X509_STORE_CTX_cleanup(&ctx);
306 int CMS_verify(CMS_ContentInfo *cms, STACK_OF(X509) *certs,
307 X509_STORE *store, BIO *dcont, BIO *out, unsigned int flags)
310 STACK_OF(CMS_SignerInfo) *sinfos;
311 STACK_OF(X509) *cms_certs = NULL;
312 STACK_OF(X509_CRL) *crls = NULL;
314 int i, scount = 0, ret = 0;
315 BIO *cmsbio = NULL, *tmpin = NULL, *tmpout = NULL;
317 if (!dcont && !check_content(cms))
319 if (dcont && !(flags & CMS_BINARY)) {
320 const ASN1_OBJECT *coid = CMS_get0_eContentType(cms);
321 if (OBJ_obj2nid(coid) == NID_id_ct_asciiTextWithCRLF)
322 flags |= CMS_ASCIICRLF;
325 /* Attempt to find all signer certificates */
327 sinfos = CMS_get0_SignerInfos(cms);
329 if (sk_CMS_SignerInfo_num(sinfos) <= 0) {
330 CMSerr(CMS_F_CMS_VERIFY, CMS_R_NO_SIGNERS);
334 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
335 si = sk_CMS_SignerInfo_value(sinfos, i);
336 CMS_SignerInfo_get0_algs(si, NULL, &signer, NULL, NULL);
341 if (scount != sk_CMS_SignerInfo_num(sinfos))
342 scount += CMS_set1_signers_certs(cms, certs, flags);
344 if (scount != sk_CMS_SignerInfo_num(sinfos)) {
345 CMSerr(CMS_F_CMS_VERIFY, CMS_R_SIGNER_CERTIFICATE_NOT_FOUND);
349 /* Attempt to verify all signers certs */
351 if (!(flags & CMS_NO_SIGNER_CERT_VERIFY)) {
352 cms_certs = CMS_get1_certs(cms);
353 if (!(flags & CMS_NOCRL))
354 crls = CMS_get1_crls(cms);
355 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
356 si = sk_CMS_SignerInfo_value(sinfos, i);
357 if (!cms_signerinfo_verify_cert(si, store,
358 cms_certs, crls, flags))
363 /* Attempt to verify all SignerInfo signed attribute signatures */
365 if (!(flags & CMS_NO_ATTR_VERIFY)) {
366 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
367 si = sk_CMS_SignerInfo_value(sinfos, i);
368 if (CMS_signed_get_attr_count(si) < 0)
370 if (CMS_SignerInfo_verify(si) <= 0)
376 * Performance optimization: if the content is a memory BIO then store
377 * its contents in a temporary read only memory BIO. This avoids
378 * potentially large numbers of slow copies of data which will occur when
379 * reading from a read write memory BIO when signatures are calculated.
382 if (dcont && (BIO_method_type(dcont) == BIO_TYPE_MEM)) {
385 len = BIO_get_mem_data(dcont, &ptr);
386 tmpin = BIO_new_mem_buf(ptr, len);
388 CMSerr(CMS_F_CMS_VERIFY, ERR_R_MALLOC_FAILURE);
394 * If not binary mode and detached generate digests by *writing* through
395 * the BIO. That makes it possible to canonicalise the input.
397 if (!(flags & SMIME_BINARY) && dcont) {
399 * Create output BIO so we can either handle text or to ensure
400 * included content doesn't override detached content.
402 tmpout = cms_get_text_bio(out, flags);
404 CMSerr(CMS_F_CMS_VERIFY, ERR_R_MALLOC_FAILURE);
407 cmsbio = CMS_dataInit(cms, tmpout);
411 * Don't use SMIME_TEXT for verify: it adds headers and we want to
414 SMIME_crlf_copy(dcont, cmsbio, flags & ~SMIME_TEXT);
416 if (flags & CMS_TEXT) {
417 if (!SMIME_text(tmpout, out)) {
418 CMSerr(CMS_F_CMS_VERIFY, CMS_R_SMIME_TEXT_ERROR);
423 cmsbio = CMS_dataInit(cms, tmpin);
427 if (!cms_copy_content(out, cmsbio, flags))
431 if (!(flags & CMS_NO_CONTENT_VERIFY)) {
432 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
433 si = sk_CMS_SignerInfo_value(sinfos, i);
434 if (CMS_SignerInfo_verify_content(si, cmsbio) <= 0) {
435 CMSerr(CMS_F_CMS_VERIFY, CMS_R_CONTENT_VERIFY_ERROR);
444 if (!(flags & SMIME_BINARY) && dcont) {
445 do_free_upto(cmsbio, tmpout);
449 if (dcont && (tmpin == dcont))
450 do_free_upto(cmsbio, dcont);
452 BIO_free_all(cmsbio);
456 BIO_free_all(tmpout);
459 sk_X509_pop_free(cms_certs, X509_free);
460 sk_X509_CRL_pop_free(crls, X509_CRL_free);
465 int CMS_verify_receipt(CMS_ContentInfo *rcms, CMS_ContentInfo *ocms,
466 STACK_OF(X509) *certs,
467 X509_STORE *store, unsigned int flags)
470 flags &= ~(CMS_DETACHED | CMS_TEXT);
471 r = CMS_verify(rcms, certs, store, NULL, NULL, flags);
474 return cms_Receipt_verify(rcms, ocms);
477 CMS_ContentInfo *CMS_sign(X509 *signcert, EVP_PKEY *pkey,
478 STACK_OF(X509) *certs, BIO *data,
481 CMS_ContentInfo *cms;
484 cms = CMS_ContentInfo_new();
485 if (!cms || !CMS_SignedData_init(cms))
487 if (flags & CMS_ASCIICRLF
488 && !CMS_set1_eContentType(cms,
489 OBJ_nid2obj(NID_id_ct_asciiTextWithCRLF)))
492 if (pkey && !CMS_add1_signer(cms, signcert, pkey, NULL, flags)) {
493 CMSerr(CMS_F_CMS_SIGN, CMS_R_ADD_SIGNER_ERROR);
497 for (i = 0; i < sk_X509_num(certs); i++) {
498 X509 *x = sk_X509_value(certs, i);
499 if (!CMS_add1_cert(cms, x))
503 if (!(flags & CMS_DETACHED))
504 CMS_set_detached(cms, 0);
506 if ((flags & (CMS_STREAM | CMS_PARTIAL))
507 || CMS_final(cms, data, NULL, flags))
513 CMSerr(CMS_F_CMS_SIGN, ERR_R_MALLOC_FAILURE);
516 CMS_ContentInfo_free(cms);
520 CMS_ContentInfo *CMS_sign_receipt(CMS_SignerInfo *si,
521 X509 *signcert, EVP_PKEY *pkey,
522 STACK_OF(X509) *certs, unsigned int flags)
524 CMS_SignerInfo *rct_si;
525 CMS_ContentInfo *cms = NULL;
526 ASN1_OCTET_STRING **pos, *os;
527 BIO *rct_cont = NULL;
530 flags &= ~(CMS_STREAM | CMS_TEXT);
531 /* Not really detached but avoids content being allocated */
532 flags |= CMS_PARTIAL | CMS_BINARY | CMS_DETACHED;
533 if (!pkey || !signcert) {
534 CMSerr(CMS_F_CMS_SIGN_RECEIPT, CMS_R_NO_KEY_OR_CERT);
538 /* Initialize signed data */
540 cms = CMS_sign(NULL, NULL, certs, NULL, flags);
544 /* Set inner content type to signed receipt */
545 if (!CMS_set1_eContentType(cms, OBJ_nid2obj(NID_id_smime_ct_receipt)))
548 rct_si = CMS_add1_signer(cms, signcert, pkey, NULL, flags);
550 CMSerr(CMS_F_CMS_SIGN_RECEIPT, CMS_R_ADD_SIGNER_ERROR);
554 os = cms_encode_Receipt(si);
559 /* Set content to digest */
560 rct_cont = BIO_new_mem_buf(os->data, os->length);
564 /* Add msgSigDigest attribute */
566 if (!cms_msgSigDigest_add1(rct_si, si))
569 /* Finalize structure */
570 if (!CMS_final(cms, rct_cont, NULL, flags))
573 /* Set embedded content */
574 pos = CMS_get0_content(cms);
583 CMS_ContentInfo_free(cms);
588 CMS_ContentInfo *CMS_encrypt(STACK_OF(X509) *certs, BIO *data,
589 const EVP_CIPHER *cipher, unsigned int flags)
591 CMS_ContentInfo *cms;
594 cms = CMS_EnvelopedData_create(cipher);
597 for (i = 0; i < sk_X509_num(certs); i++) {
598 recip = sk_X509_value(certs, i);
599 if (!CMS_add1_recipient_cert(cms, recip, flags)) {
600 CMSerr(CMS_F_CMS_ENCRYPT, CMS_R_RECIPIENT_ERROR);
605 if (!(flags & CMS_DETACHED))
606 CMS_set_detached(cms, 0);
608 if ((flags & (CMS_STREAM | CMS_PARTIAL))
609 || CMS_final(cms, data, NULL, flags))
615 CMSerr(CMS_F_CMS_ENCRYPT, ERR_R_MALLOC_FAILURE);
617 CMS_ContentInfo_free(cms);
621 static int cms_kari_set1_pkey(CMS_ContentInfo *cms, CMS_RecipientInfo *ri,
622 EVP_PKEY *pk, X509 *cert)
625 STACK_OF(CMS_RecipientEncryptedKey) *reks;
626 CMS_RecipientEncryptedKey *rek;
627 reks = CMS_RecipientInfo_kari_get0_reks(ri);
630 for (i = 0; i < sk_CMS_RecipientEncryptedKey_num(reks); i++) {
632 rek = sk_CMS_RecipientEncryptedKey_value(reks, i);
633 if (CMS_RecipientEncryptedKey_cert_cmp(rek, cert))
635 CMS_RecipientInfo_kari_set0_pkey(ri, pk);
636 rv = CMS_RecipientInfo_kari_decrypt(cms, ri, rek);
637 CMS_RecipientInfo_kari_set0_pkey(ri, NULL);
645 int CMS_decrypt_set1_pkey(CMS_ContentInfo *cms, EVP_PKEY *pk, X509 *cert)
647 STACK_OF(CMS_RecipientInfo) *ris;
648 CMS_RecipientInfo *ri;
650 int debug = 0, match_ri = 0;
651 ris = CMS_get0_RecipientInfos(cms);
653 debug = cms->d.envelopedData->encryptedContentInfo->debug;
654 ri_type = cms_pkey_get_ri_type(pk);
655 if (ri_type == CMS_RECIPINFO_NONE) {
656 CMSerr(CMS_F_CMS_DECRYPT_SET1_PKEY,
657 CMS_R_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
661 for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++) {
662 ri = sk_CMS_RecipientInfo_value(ris, i);
663 if (CMS_RecipientInfo_type(ri) != ri_type)
666 if (ri_type == CMS_RECIPINFO_AGREE) {
667 r = cms_kari_set1_pkey(cms, ri, pk, cert);
674 * If we have a cert try matching RecipientInfo otherwise try them
677 else if (!cert || !CMS_RecipientInfo_ktri_cert_cmp(ri, cert)) {
678 CMS_RecipientInfo_set0_pkey(ri, pk);
679 r = CMS_RecipientInfo_decrypt(cms, ri);
680 CMS_RecipientInfo_set0_pkey(ri, NULL);
683 * If not debugging clear any error and return success to
684 * avoid leaking of information useful to MMA
692 CMSerr(CMS_F_CMS_DECRYPT_SET1_PKEY, CMS_R_DECRYPT_ERROR);
696 * If no cert and not debugging don't leave loop after first
697 * successful decrypt. Always attempt to decrypt all recipients
698 * to avoid leaking timing of a successful decrypt.
700 else if (r > 0 && debug)
704 /* If no cert and not debugging always return success */
705 if (match_ri && !cert && !debug) {
710 CMSerr(CMS_F_CMS_DECRYPT_SET1_PKEY, CMS_R_NO_MATCHING_RECIPIENT);
715 int CMS_decrypt_set1_key(CMS_ContentInfo *cms,
716 unsigned char *key, size_t keylen,
717 unsigned char *id, size_t idlen)
719 STACK_OF(CMS_RecipientInfo) *ris;
720 CMS_RecipientInfo *ri;
722 ris = CMS_get0_RecipientInfos(cms);
723 for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++) {
724 ri = sk_CMS_RecipientInfo_value(ris, i);
725 if (CMS_RecipientInfo_type(ri) != CMS_RECIPINFO_KEK)
729 * If we have an id try matching RecipientInfo otherwise try them
732 if (!id || (CMS_RecipientInfo_kekri_id_cmp(ri, id, idlen) == 0)) {
733 CMS_RecipientInfo_set0_key(ri, key, keylen);
734 r = CMS_RecipientInfo_decrypt(cms, ri);
735 CMS_RecipientInfo_set0_key(ri, NULL, 0);
739 CMSerr(CMS_F_CMS_DECRYPT_SET1_KEY, CMS_R_DECRYPT_ERROR);
746 CMSerr(CMS_F_CMS_DECRYPT_SET1_KEY, CMS_R_NO_MATCHING_RECIPIENT);
751 int CMS_decrypt_set1_password(CMS_ContentInfo *cms,
752 unsigned char *pass, ossl_ssize_t passlen)
754 STACK_OF(CMS_RecipientInfo) *ris;
755 CMS_RecipientInfo *ri;
757 ris = CMS_get0_RecipientInfos(cms);
758 for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++) {
759 ri = sk_CMS_RecipientInfo_value(ris, i);
760 if (CMS_RecipientInfo_type(ri) != CMS_RECIPINFO_PASS)
762 CMS_RecipientInfo_set0_password(ri, pass, passlen);
763 r = CMS_RecipientInfo_decrypt(cms, ri);
764 CMS_RecipientInfo_set0_password(ri, NULL, 0);
769 CMSerr(CMS_F_CMS_DECRYPT_SET1_PASSWORD, CMS_R_NO_MATCHING_RECIPIENT);
774 int CMS_decrypt(CMS_ContentInfo *cms, EVP_PKEY *pk, X509 *cert,
775 BIO *dcont, BIO *out, unsigned int flags)
779 if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_enveloped) {
780 CMSerr(CMS_F_CMS_DECRYPT, CMS_R_TYPE_NOT_ENVELOPED_DATA);
783 if (!dcont && !check_content(cms))
785 if (flags & CMS_DEBUG_DECRYPT)
786 cms->d.envelopedData->encryptedContentInfo->debug = 1;
788 cms->d.envelopedData->encryptedContentInfo->debug = 0;
789 if (!pk && !cert && !dcont && !out)
791 if (pk && !CMS_decrypt_set1_pkey(cms, pk, cert))
793 cont = CMS_dataInit(cms, dcont);
796 r = cms_copy_content(out, cont, flags);
797 do_free_upto(cont, dcont);
801 int CMS_final(CMS_ContentInfo *cms, BIO *data, BIO *dcont, unsigned int flags)
806 if ((cmsbio = CMS_dataInit(cms, dcont)) == NULL) {
807 CMSerr(CMS_F_CMS_FINAL, ERR_R_MALLOC_FAILURE);
811 SMIME_crlf_copy(data, cmsbio, flags);
813 (void)BIO_flush(cmsbio);
815 if (!CMS_dataFinal(cms, cmsbio)) {
816 CMSerr(CMS_F_CMS_FINAL, CMS_R_CMS_DATAFINAL_ERROR);
823 do_free_upto(cmsbio, dcont);
831 int CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
836 if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_id_smime_ct_compressedData) {
837 CMSerr(CMS_F_CMS_UNCOMPRESS, CMS_R_TYPE_NOT_COMPRESSED_DATA);
841 if (!dcont && !check_content(cms))
844 cont = CMS_dataInit(cms, dcont);
847 r = cms_copy_content(out, cont, flags);
848 do_free_upto(cont, dcont);
852 CMS_ContentInfo *CMS_compress(BIO *in, int comp_nid, unsigned int flags)
854 CMS_ContentInfo *cms;
856 comp_nid = NID_zlib_compression;
857 cms = cms_CompressedData_create(comp_nid);
861 if (!(flags & CMS_DETACHED))
862 CMS_set_detached(cms, 0);
864 if ((flags & CMS_STREAM) || CMS_final(cms, in, NULL, flags))
867 CMS_ContentInfo_free(cms);
873 int CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
876 CMSerr(CMS_F_CMS_UNCOMPRESS, CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
880 CMS_ContentInfo *CMS_compress(BIO *in, int comp_nid, unsigned int flags)
882 CMSerr(CMS_F_CMS_COMPRESS, CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);