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 * ====================================================================
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>
63 static int cms_copy_content(BIO *out, BIO *in, unsigned int flags)
65 unsigned char buf[4096];
70 tmpout = BIO_new(BIO_s_null());
71 else if (flags & CMS_TEXT) {
72 tmpout = BIO_new(BIO_s_mem());
73 BIO_set_mem_eof_return(tmpout, 0);
78 CMSerr(CMS_F_CMS_COPY_CONTENT, ERR_R_MALLOC_FAILURE);
82 /* Read all content through chain to process digest, decrypt etc */
84 i = BIO_read(in, buf, sizeof(buf));
86 if (BIO_method_type(in) == BIO_TYPE_CIPHER) {
87 if (!BIO_get_cipher_status(in))
95 if (tmpout && (BIO_write(tmpout, buf, i) != i))
99 if (flags & CMS_TEXT) {
100 if (!SMIME_text(tmpout, out)) {
101 CMSerr(CMS_F_CMS_COPY_CONTENT, CMS_R_SMIME_TEXT_ERROR);
109 if (tmpout && (tmpout != out))
115 static int check_content(CMS_ContentInfo *cms)
117 ASN1_OCTET_STRING **pos = CMS_get0_content(cms);
119 CMSerr(CMS_F_CHECK_CONTENT, CMS_R_NO_CONTENT);
125 static void do_free_upto(BIO *f, BIO *upto)
134 while (f && f != upto);
139 int CMS_data(CMS_ContentInfo *cms, BIO *out, unsigned int flags)
143 if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_data) {
144 CMSerr(CMS_F_CMS_DATA, CMS_R_TYPE_NOT_DATA);
147 cont = CMS_dataInit(cms, NULL);
150 r = cms_copy_content(out, cont, flags);
155 CMS_ContentInfo *CMS_data_create(BIO *in, unsigned int flags)
157 CMS_ContentInfo *cms;
158 cms = cms_Data_create();
162 if (CMS_final(cms, in, NULL, flags))
165 CMS_ContentInfo_free(cms);
170 int CMS_digest_verify(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
175 if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_digest) {
176 CMSerr(CMS_F_CMS_DIGEST_VERIFY, CMS_R_TYPE_NOT_DIGESTED_DATA);
180 if (!dcont && !check_content(cms))
183 cont = CMS_dataInit(cms, dcont);
186 r = cms_copy_content(out, cont, flags);
188 r = cms_DigestedData_do_final(cms, cont, 1);
189 do_free_upto(cont, dcont);
193 CMS_ContentInfo *CMS_digest_create(BIO *in, const EVP_MD *md,
196 CMS_ContentInfo *cms;
199 cms = cms_DigestedData_create(md);
203 if (!(flags & CMS_DETACHED)) {
204 flags &= ~CMS_STREAM;
205 CMS_set_detached(cms, 0);
208 if ((flags & CMS_STREAM) || CMS_final(cms, in, NULL, flags))
211 CMS_ContentInfo_free(cms);
215 int CMS_EncryptedData_decrypt(CMS_ContentInfo *cms,
216 const unsigned char *key, size_t keylen,
217 BIO *dcont, BIO *out, unsigned int flags)
221 if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_encrypted) {
222 CMSerr(CMS_F_CMS_ENCRYPTEDDATA_DECRYPT,
223 CMS_R_TYPE_NOT_ENCRYPTED_DATA);
227 if (!dcont && !check_content(cms))
230 if (CMS_EncryptedData_set1_key(cms, NULL, key, keylen) <= 0)
232 cont = CMS_dataInit(cms, dcont);
235 r = cms_copy_content(out, cont, flags);
236 do_free_upto(cont, dcont);
240 CMS_ContentInfo *CMS_EncryptedData_encrypt(BIO *in, const EVP_CIPHER *cipher,
241 const unsigned char *key,
242 size_t keylen, unsigned int flags)
244 CMS_ContentInfo *cms;
246 CMSerr(CMS_F_CMS_ENCRYPTEDDATA_ENCRYPT, CMS_R_NO_CIPHER);
249 cms = CMS_ContentInfo_new();
252 if (!CMS_EncryptedData_set1_key(cms, cipher, key, keylen))
255 if (!(flags & CMS_DETACHED)) {
256 flags &= ~CMS_STREAM;
257 CMS_set_detached(cms, 0);
260 if ((flags & (CMS_STREAM | CMS_PARTIAL))
261 || CMS_final(cms, in, NULL, flags))
264 CMS_ContentInfo_free(cms);
268 static int cms_signerinfo_verify_cert(CMS_SignerInfo *si,
270 STACK_OF(X509) *certs,
271 STACK_OF(X509_CRL) *crls,
277 CMS_SignerInfo_get0_algs(si, NULL, &signer, NULL, NULL);
278 if (!X509_STORE_CTX_init(&ctx, store, signer, certs)) {
279 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CERT, CMS_R_STORE_INIT_ERROR);
282 X509_STORE_CTX_set_default(&ctx, "smime_sign");
284 X509_STORE_CTX_set0_crls(&ctx, crls);
286 i = X509_verify_cert(&ctx);
288 j = X509_STORE_CTX_get_error(&ctx);
289 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CERT,
290 CMS_R_CERTIFICATE_VERIFY_ERROR);
291 ERR_add_error_data(2, "Verify error:",
292 X509_verify_cert_error_string(j));
297 X509_STORE_CTX_cleanup(&ctx);
302 int CMS_verify(CMS_ContentInfo *cms, STACK_OF(X509) *certs,
303 X509_STORE *store, BIO *dcont, BIO *out, unsigned int flags)
306 STACK_OF(CMS_SignerInfo) *sinfos;
307 STACK_OF(X509) *cms_certs = NULL;
308 STACK_OF(X509_CRL) *crls = NULL;
310 int i, scount = 0, ret = 0;
311 BIO *cmsbio = NULL, *tmpin = NULL;
313 if (!dcont && !check_content(cms))
316 /* Attempt to find all signer certificates */
318 sinfos = CMS_get0_SignerInfos(cms);
320 if (sk_CMS_SignerInfo_num(sinfos) <= 0) {
321 CMSerr(CMS_F_CMS_VERIFY, CMS_R_NO_SIGNERS);
325 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
326 si = sk_CMS_SignerInfo_value(sinfos, i);
327 CMS_SignerInfo_get0_algs(si, NULL, &signer, NULL, NULL);
332 if (scount != sk_CMS_SignerInfo_num(sinfos))
333 scount += CMS_set1_signers_certs(cms, certs, flags);
335 if (scount != sk_CMS_SignerInfo_num(sinfos)) {
336 CMSerr(CMS_F_CMS_VERIFY, CMS_R_SIGNER_CERTIFICATE_NOT_FOUND);
340 /* Attempt to verify all signers certs */
342 if (!(flags & CMS_NO_SIGNER_CERT_VERIFY)) {
343 cms_certs = CMS_get1_certs(cms);
344 if (!(flags & CMS_NOCRL))
345 crls = CMS_get1_crls(cms);
346 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
347 si = sk_CMS_SignerInfo_value(sinfos, i);
348 if (!cms_signerinfo_verify_cert(si, store,
349 cms_certs, crls, flags))
354 /* Attempt to verify all SignerInfo signed attribute signatures */
356 if (!(flags & CMS_NO_ATTR_VERIFY)) {
357 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
358 si = sk_CMS_SignerInfo_value(sinfos, i);
359 if (CMS_signed_get_attr_count(si) < 0)
361 if (CMS_SignerInfo_verify(si) <= 0)
367 * Performance optimization: if the content is a memory BIO then store
368 * its contents in a temporary read only memory BIO. This avoids
369 * potentially large numbers of slow copies of data which will occur when
370 * reading from a read write memory BIO when signatures are calculated.
373 if (dcont && (BIO_method_type(dcont) == BIO_TYPE_MEM)) {
376 len = BIO_get_mem_data(dcont, &ptr);
377 tmpin = BIO_new_mem_buf(ptr, len);
379 CMSerr(CMS_F_CMS_VERIFY, ERR_R_MALLOC_FAILURE);
385 cmsbio = CMS_dataInit(cms, tmpin);
389 if (!cms_copy_content(out, cmsbio, flags))
392 if (!(flags & CMS_NO_CONTENT_VERIFY)) {
393 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++) {
394 si = sk_CMS_SignerInfo_value(sinfos, i);
395 if (CMS_SignerInfo_verify_content(si, cmsbio) <= 0) {
396 CMSerr(CMS_F_CMS_VERIFY, CMS_R_CONTENT_VERIFY_ERROR);
406 if (dcont && (tmpin == dcont))
407 do_free_upto(cmsbio, dcont);
409 BIO_free_all(cmsbio);
412 sk_X509_pop_free(cms_certs, X509_free);
414 sk_X509_CRL_pop_free(crls, X509_CRL_free);
419 int CMS_verify_receipt(CMS_ContentInfo *rcms, CMS_ContentInfo *ocms,
420 STACK_OF(X509) *certs,
421 X509_STORE *store, unsigned int flags)
424 r = CMS_verify(rcms, certs, store, NULL, NULL, flags);
427 return cms_Receipt_verify(rcms, ocms);
430 CMS_ContentInfo *CMS_sign(X509 *signcert, EVP_PKEY *pkey,
431 STACK_OF(X509) *certs, BIO *data,
434 CMS_ContentInfo *cms;
437 cms = CMS_ContentInfo_new();
438 if (!cms || !CMS_SignedData_init(cms))
441 if (pkey && !CMS_add1_signer(cms, signcert, pkey, NULL, flags)) {
442 CMSerr(CMS_F_CMS_SIGN, CMS_R_ADD_SIGNER_ERROR);
446 for (i = 0; i < sk_X509_num(certs); i++) {
447 X509 *x = sk_X509_value(certs, i);
448 if (!CMS_add1_cert(cms, x))
452 if (!(flags & CMS_DETACHED)) {
453 flags &= ~CMS_STREAM;
454 CMS_set_detached(cms, 0);
457 if ((flags & (CMS_STREAM | CMS_PARTIAL))
458 || CMS_final(cms, data, NULL, flags))
464 CMSerr(CMS_F_CMS_SIGN, ERR_R_MALLOC_FAILURE);
468 CMS_ContentInfo_free(cms);
472 CMS_ContentInfo *CMS_sign_receipt(CMS_SignerInfo *si,
473 X509 *signcert, EVP_PKEY *pkey,
474 STACK_OF(X509) *certs, unsigned int flags)
476 CMS_SignerInfo *rct_si;
477 CMS_ContentInfo *cms = NULL;
478 ASN1_OCTET_STRING **pos, *os;
479 BIO *rct_cont = NULL;
482 flags &= ~CMS_STREAM;
483 /* Not really detached but avoids content being allocated */
484 flags |= CMS_PARTIAL | CMS_BINARY | CMS_DETACHED;
485 if (!pkey || !signcert) {
486 CMSerr(CMS_F_CMS_SIGN_RECEIPT, CMS_R_NO_KEY_OR_CERT);
490 /* Initialize signed data */
492 cms = CMS_sign(NULL, NULL, certs, NULL, flags);
496 /* Set inner content type to signed receipt */
497 if (!CMS_set1_eContentType(cms, OBJ_nid2obj(NID_id_smime_ct_receipt)))
500 rct_si = CMS_add1_signer(cms, signcert, pkey, NULL, flags);
502 CMSerr(CMS_F_CMS_SIGN_RECEIPT, CMS_R_ADD_SIGNER_ERROR);
506 os = cms_encode_Receipt(si);
511 /* Set content to digest */
512 rct_cont = BIO_new_mem_buf(os->data, os->length);
516 /* Add msgSigDigest attribute */
518 if (!cms_msgSigDigest_add1(rct_si, si))
521 /* Finalize structure */
522 if (!CMS_final(cms, rct_cont, NULL, flags))
525 /* Set embedded content */
526 pos = CMS_get0_content(cms);
536 CMS_ContentInfo_free(cms);
541 CMS_ContentInfo *CMS_encrypt(STACK_OF(X509) *certs, BIO *data,
542 const EVP_CIPHER *cipher, unsigned int flags)
544 CMS_ContentInfo *cms;
547 cms = CMS_EnvelopedData_create(cipher);
550 for (i = 0; i < sk_X509_num(certs); i++) {
551 recip = sk_X509_value(certs, i);
552 if (!CMS_add1_recipient_cert(cms, recip, flags)) {
553 CMSerr(CMS_F_CMS_ENCRYPT, CMS_R_RECIPIENT_ERROR);
558 if (!(flags & CMS_DETACHED)) {
559 flags &= ~CMS_STREAM;
560 CMS_set_detached(cms, 0);
563 if ((flags & (CMS_STREAM | CMS_PARTIAL))
564 || CMS_final(cms, data, NULL, flags))
570 CMSerr(CMS_F_CMS_ENCRYPT, ERR_R_MALLOC_FAILURE);
573 CMS_ContentInfo_free(cms);
577 int CMS_decrypt_set1_pkey(CMS_ContentInfo *cms, EVP_PKEY *pk, X509 *cert)
579 STACK_OF(CMS_RecipientInfo) *ris;
580 CMS_RecipientInfo *ri;
582 int debug = 0, ri_match = 0;
583 ris = CMS_get0_RecipientInfos(cms);
585 debug = cms->d.envelopedData->encryptedContentInfo->debug;
586 for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++) {
587 ri = sk_CMS_RecipientInfo_value(ris, i);
588 if (CMS_RecipientInfo_type(ri) != CMS_RECIPINFO_TRANS)
592 * If we have a cert try matching RecipientInfo otherwise try them
595 if (!cert || (CMS_RecipientInfo_ktri_cert_cmp(ri, cert) == 0)) {
596 CMS_RecipientInfo_set0_pkey(ri, pk);
597 r = CMS_RecipientInfo_decrypt(cms, ri);
598 CMS_RecipientInfo_set0_pkey(ri, NULL);
601 * If not debugging clear any error and return success to
602 * avoid leaking of information useful to MMA
610 CMSerr(CMS_F_CMS_DECRYPT_SET1_PKEY, CMS_R_DECRYPT_ERROR);
614 * If no cert and not debugging don't leave loop after first
615 * successful decrypt. Always attempt to decrypt all recipients
616 * to avoid leaking timing of a successful decrypt.
618 else if (r > 0 && debug)
622 /* If no cert and not debugging always return success */
623 if (ri_match && !cert && !debug) {
628 CMSerr(CMS_F_CMS_DECRYPT_SET1_PKEY, CMS_R_NO_MATCHING_RECIPIENT);
633 int CMS_decrypt_set1_key(CMS_ContentInfo *cms,
634 unsigned char *key, size_t keylen,
635 unsigned char *id, size_t idlen)
637 STACK_OF(CMS_RecipientInfo) *ris;
638 CMS_RecipientInfo *ri;
640 ris = CMS_get0_RecipientInfos(cms);
641 for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++) {
642 ri = sk_CMS_RecipientInfo_value(ris, i);
643 if (CMS_RecipientInfo_type(ri) != CMS_RECIPINFO_KEK)
647 * If we have an id try matching RecipientInfo otherwise try them
650 if (!id || (CMS_RecipientInfo_kekri_id_cmp(ri, id, idlen) == 0)) {
651 CMS_RecipientInfo_set0_key(ri, key, keylen);
652 r = CMS_RecipientInfo_decrypt(cms, ri);
653 CMS_RecipientInfo_set0_key(ri, NULL, 0);
657 CMSerr(CMS_F_CMS_DECRYPT_SET1_KEY, CMS_R_DECRYPT_ERROR);
664 CMSerr(CMS_F_CMS_DECRYPT_SET1_KEY, CMS_R_NO_MATCHING_RECIPIENT);
669 int CMS_decrypt(CMS_ContentInfo *cms, EVP_PKEY *pk, X509 *cert,
670 BIO *dcont, BIO *out, unsigned int flags)
674 if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_enveloped) {
675 CMSerr(CMS_F_CMS_DECRYPT, CMS_R_TYPE_NOT_ENVELOPED_DATA);
678 if (!dcont && !check_content(cms))
680 if (flags & CMS_DEBUG_DECRYPT)
681 cms->d.envelopedData->encryptedContentInfo->debug = 1;
683 cms->d.envelopedData->encryptedContentInfo->debug = 0;
684 if (!pk && !cert && !dcont && !out)
686 if (pk && !CMS_decrypt_set1_pkey(cms, pk, cert))
688 cont = CMS_dataInit(cms, dcont);
691 r = cms_copy_content(out, cont, flags);
692 do_free_upto(cont, dcont);
696 int CMS_final(CMS_ContentInfo *cms, BIO *data, BIO *dcont, unsigned int flags)
700 if (!(cmsbio = CMS_dataInit(cms, dcont))) {
701 CMSerr(CMS_F_CMS_FINAL, ERR_R_MALLOC_FAILURE);
705 SMIME_crlf_copy(data, cmsbio, flags);
707 (void)BIO_flush(cmsbio);
709 if (!CMS_dataFinal(cms, cmsbio)) {
710 CMSerr(CMS_F_CMS_FINAL, CMS_R_CMS_DATAFINAL_ERROR);
717 do_free_upto(cmsbio, dcont);
725 int CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
730 if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_id_smime_ct_compressedData) {
731 CMSerr(CMS_F_CMS_UNCOMPRESS, CMS_R_TYPE_NOT_COMPRESSED_DATA);
735 if (!dcont && !check_content(cms))
738 cont = CMS_dataInit(cms, dcont);
741 r = cms_copy_content(out, cont, flags);
742 do_free_upto(cont, dcont);
746 CMS_ContentInfo *CMS_compress(BIO *in, int comp_nid, unsigned int flags)
748 CMS_ContentInfo *cms;
750 comp_nid = NID_zlib_compression;
751 cms = cms_CompressedData_create(comp_nid);
755 if (!(flags & CMS_DETACHED)) {
756 flags &= ~CMS_STREAM;
757 CMS_set_detached(cms, 0);
760 if (CMS_final(cms, in, NULL, flags))
763 CMS_ContentInfo_free(cms);
769 int CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
772 CMSerr(CMS_F_CMS_UNCOMPRESS, CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
776 CMS_ContentInfo *CMS_compress(BIO *in, int comp_nid, unsigned int flags)
778 CMSerr(CMS_F_CMS_COMPRESS, CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);