1 /* crypto/cms/cms_smime.c */
2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
5 /* ====================================================================
6 * Copyright (c) 2008 The OpenSSL Project. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
20 * 3. All advertising materials mentioning features or use of this
21 * software must display the following acknowledgment:
22 * "This product includes software developed by the OpenSSL Project
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 * endorse or promote products derived from this software without
27 * prior written permission. For written permission, please contact
28 * licensing@OpenSSL.org.
30 * 5. Products derived from this software may not be called "OpenSSL"
31 * nor may "OpenSSL" appear in their names without prior written
32 * permission of the OpenSSL Project.
34 * 6. Redistributions of any form whatsoever must retain the following
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
55 #include <openssl/asn1t.h>
56 #include <openssl/x509.h>
57 #include <openssl/x509v3.h>
58 #include <openssl/err.h>
59 #include <openssl/cms.h>
61 #include "asn1_locl.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)
73 tmpout = BIO_new(BIO_s_mem());
74 BIO_set_mem_eof_return(tmpout, 0);
81 CMSerr(CMS_F_CMS_COPY_CONTENT,ERR_R_MALLOC_FAILURE);
85 /* Read all content through chain to process digest, decrypt etc */
88 i=BIO_read(in,buf,sizeof(buf));
91 if (BIO_method_type(in) == BIO_TYPE_CIPHER)
93 if (!BIO_get_cipher_status(in))
101 if (tmpout && (BIO_write(tmpout, buf, i) != i))
107 if(!SMIME_text(tmpout, out))
109 CMSerr(CMS_F_CMS_COPY_CONTENT,CMS_R_SMIME_TEXT_ERROR);
117 if (tmpout && (tmpout != out))
123 static int check_content(CMS_ContentInfo *cms)
125 ASN1_OCTET_STRING **pos = CMS_get0_content(cms);
128 CMSerr(CMS_F_CHECK_CONTENT, CMS_R_NO_CONTENT);
134 static void do_free_upto(BIO *f, BIO *upto)
151 int CMS_data(CMS_ContentInfo *cms, BIO *out, unsigned int flags)
155 if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_data)
157 CMSerr(CMS_F_CMS_DATA, CMS_R_TYPE_NOT_DATA);
160 cont = CMS_dataInit(cms, NULL);
163 r = cms_copy_content(out, cont, flags);
168 CMS_ContentInfo *CMS_data_create(BIO *in, unsigned int flags)
170 CMS_ContentInfo *cms;
171 cms = cms_Data_create();
175 if ((flags & CMS_STREAM) || CMS_final(cms, in, NULL, flags))
178 CMS_ContentInfo_free(cms);
183 int CMS_digest_verify(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
188 if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_digest)
190 CMSerr(CMS_F_CMS_DIGEST_VERIFY, CMS_R_TYPE_NOT_DIGESTED_DATA);
194 if (!dcont && !check_content(cms))
197 cont = CMS_dataInit(cms, dcont);
200 r = cms_copy_content(out, cont, flags);
202 r = cms_DigestedData_do_final(cms, cont, 1);
203 do_free_upto(cont, dcont);
207 CMS_ContentInfo *CMS_digest_create(BIO *in, const EVP_MD *md,
210 CMS_ContentInfo *cms;
213 cms = cms_DigestedData_create(md);
217 if(!(flags & CMS_DETACHED))
218 CMS_set_detached(cms, 0);
220 if ((flags & CMS_STREAM) || CMS_final(cms, in, NULL, flags))
223 CMS_ContentInfo_free(cms);
227 int CMS_EncryptedData_decrypt(CMS_ContentInfo *cms,
228 const unsigned char *key, size_t keylen,
229 BIO *dcont, BIO *out, unsigned int flags)
233 if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_encrypted)
235 CMSerr(CMS_F_CMS_ENCRYPTEDDATA_DECRYPT,
236 CMS_R_TYPE_NOT_ENCRYPTED_DATA);
240 if (!dcont && !check_content(cms))
243 if (CMS_EncryptedData_set1_key(cms, NULL, key, keylen) <= 0)
245 cont = CMS_dataInit(cms, dcont);
248 r = cms_copy_content(out, cont, flags);
249 do_free_upto(cont, dcont);
253 CMS_ContentInfo *CMS_EncryptedData_encrypt(BIO *in, const EVP_CIPHER *cipher,
254 const unsigned char *key, size_t keylen,
257 CMS_ContentInfo *cms;
260 CMSerr(CMS_F_CMS_ENCRYPTEDDATA_ENCRYPT, CMS_R_NO_CIPHER);
263 cms = CMS_ContentInfo_new();
266 if (!CMS_EncryptedData_set1_key(cms, cipher, key, keylen))
269 if(!(flags & CMS_DETACHED))
270 CMS_set_detached(cms, 0);
272 if ((flags & (CMS_STREAM|CMS_PARTIAL))
273 || CMS_final(cms, in, NULL, flags))
276 CMS_ContentInfo_free(cms);
280 static int cms_signerinfo_verify_cert(CMS_SignerInfo *si,
282 STACK_OF(X509) *certs,
283 STACK_OF(X509_CRL) *crls,
289 CMS_SignerInfo_get0_algs(si, NULL, &signer, NULL, NULL);
290 if (!X509_STORE_CTX_init(&ctx, store, signer, certs))
292 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CERT,
293 CMS_R_STORE_INIT_ERROR);
296 X509_STORE_CTX_set_default(&ctx, "smime_sign");
298 X509_STORE_CTX_set0_crls(&ctx, crls);
300 i = X509_verify_cert(&ctx);
303 j = X509_STORE_CTX_get_error(&ctx);
304 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CERT,
305 CMS_R_CERTIFICATE_VERIFY_ERROR);
306 ERR_add_error_data(2, "Verify error:",
307 X509_verify_cert_error_string(j));
312 X509_STORE_CTX_cleanup(&ctx);
317 int CMS_verify(CMS_ContentInfo *cms, STACK_OF(X509) *certs,
318 X509_STORE *store, BIO *dcont, BIO *out, unsigned int flags)
321 STACK_OF(CMS_SignerInfo) *sinfos;
322 STACK_OF(X509) *cms_certs = NULL;
323 STACK_OF(X509_CRL) *crls = NULL;
325 int i, scount = 0, ret = 0;
326 BIO *cmsbio = NULL, *tmpin = NULL;
328 if (!dcont && !check_content(cms))
331 /* Attempt to find all signer certificates */
333 sinfos = CMS_get0_SignerInfos(cms);
335 if (sk_CMS_SignerInfo_num(sinfos) <= 0)
337 CMSerr(CMS_F_CMS_VERIFY, CMS_R_NO_SIGNERS);
341 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
343 si = sk_CMS_SignerInfo_value(sinfos, i);
344 CMS_SignerInfo_get0_algs(si, NULL, &signer, NULL, NULL);
349 if (scount != sk_CMS_SignerInfo_num(sinfos))
350 scount += CMS_set1_signers_certs(cms, certs, flags);
352 if (scount != sk_CMS_SignerInfo_num(sinfos))
354 CMSerr(CMS_F_CMS_VERIFY, CMS_R_SIGNER_CERTIFICATE_NOT_FOUND);
358 /* Attempt to verify all signers certs */
360 if (!(flags & CMS_NO_SIGNER_CERT_VERIFY))
362 cms_certs = CMS_get1_certs(cms);
363 if (!(flags & CMS_NOCRL))
364 crls = CMS_get1_crls(cms);
365 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
367 si = sk_CMS_SignerInfo_value(sinfos, i);
368 if (!cms_signerinfo_verify_cert(si, store,
369 cms_certs, crls, flags))
374 /* Attempt to verify all SignerInfo signed attribute signatures */
376 if (!(flags & CMS_NO_ATTR_VERIFY))
378 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
380 si = sk_CMS_SignerInfo_value(sinfos, i);
381 if (CMS_signed_get_attr_count(si) < 0)
383 if (CMS_SignerInfo_verify(si) <= 0)
388 /* Performance optimization: if the content is a memory BIO then
389 * store its contents in a temporary read only memory BIO. This
390 * avoids potentially large numbers of slow copies of data which will
391 * occur when reading from a read write memory BIO when signatures
395 if (dcont && (BIO_method_type(dcont) == BIO_TYPE_MEM))
399 len = BIO_get_mem_data(dcont, &ptr);
400 tmpin = BIO_new_mem_buf(ptr, len);
403 CMSerr(CMS_F_CMS_VERIFY,ERR_R_MALLOC_FAILURE);
411 cmsbio=CMS_dataInit(cms, tmpin);
415 if (!cms_copy_content(out, cmsbio, flags))
418 if (!(flags & CMS_NO_CONTENT_VERIFY))
420 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
422 si = sk_CMS_SignerInfo_value(sinfos, i);
423 if (CMS_SignerInfo_verify_content(si, cmsbio) <= 0)
425 CMSerr(CMS_F_CMS_VERIFY,
426 CMS_R_CONTENT_VERIFY_ERROR);
436 if (dcont && (tmpin == dcont))
437 do_free_upto(cmsbio, dcont);
439 BIO_free_all(cmsbio);
442 sk_X509_pop_free(cms_certs, X509_free);
444 sk_X509_CRL_pop_free(crls, X509_CRL_free);
449 int CMS_verify_receipt(CMS_ContentInfo *rcms, CMS_ContentInfo *ocms,
450 STACK_OF(X509) *certs,
451 X509_STORE *store, unsigned int flags)
454 flags &= ~(CMS_DETACHED|CMS_TEXT);
455 r = CMS_verify(rcms, certs, store, NULL, NULL, flags);
458 return cms_Receipt_verify(rcms, ocms);
461 CMS_ContentInfo *CMS_sign(X509 *signcert, EVP_PKEY *pkey, STACK_OF(X509) *certs,
462 BIO *data, unsigned int flags)
464 CMS_ContentInfo *cms;
467 cms = CMS_ContentInfo_new();
468 if (!cms || !CMS_SignedData_init(cms))
471 if (pkey && !CMS_add1_signer(cms, signcert, pkey, NULL, flags))
473 CMSerr(CMS_F_CMS_SIGN, CMS_R_ADD_SIGNER_ERROR);
477 for (i = 0; i < sk_X509_num(certs); i++)
479 X509 *x = sk_X509_value(certs, i);
480 if (!CMS_add1_cert(cms, x))
484 if(!(flags & CMS_DETACHED))
485 CMS_set_detached(cms, 0);
487 if ((flags & (CMS_STREAM|CMS_PARTIAL))
488 || CMS_final(cms, data, NULL, flags))
494 CMSerr(CMS_F_CMS_SIGN, ERR_R_MALLOC_FAILURE);
498 CMS_ContentInfo_free(cms);
502 CMS_ContentInfo *CMS_sign_receipt(CMS_SignerInfo *si,
503 X509 *signcert, EVP_PKEY *pkey,
504 STACK_OF(X509) *certs,
507 CMS_SignerInfo *rct_si;
508 CMS_ContentInfo *cms = NULL;
509 ASN1_OCTET_STRING **pos, *os;
510 BIO *rct_cont = NULL;
513 flags &= ~(CMS_STREAM|CMS_TEXT);
514 /* Not really detached but avoids content being allocated */
515 flags |= CMS_PARTIAL|CMS_BINARY|CMS_DETACHED;
516 if (!pkey || !signcert)
518 CMSerr(CMS_F_CMS_SIGN_RECEIPT, CMS_R_NO_KEY_OR_CERT);
522 /* Initialize signed data */
524 cms = CMS_sign(NULL, NULL, certs, NULL, flags);
528 /* Set inner content type to signed receipt */
529 if (!CMS_set1_eContentType(cms, OBJ_nid2obj(NID_id_smime_ct_receipt)))
532 rct_si = CMS_add1_signer(cms, signcert, pkey, NULL, flags);
535 CMSerr(CMS_F_CMS_SIGN_RECEIPT, CMS_R_ADD_SIGNER_ERROR);
539 os = cms_encode_Receipt(si);
544 /* Set content to digest */
545 rct_cont = BIO_new_mem_buf(os->data, os->length);
549 /* Add msgSigDigest attribute */
551 if (!cms_msgSigDigest_add1(rct_si, si))
554 /* Finalize structure */
555 if (!CMS_final(cms, rct_cont, NULL, flags))
558 /* Set embedded content */
559 pos = CMS_get0_content(cms);
569 CMS_ContentInfo_free(cms);
574 CMS_ContentInfo *CMS_encrypt(STACK_OF(X509) *certs, BIO *data,
575 const EVP_CIPHER *cipher, unsigned int flags)
577 CMS_ContentInfo *cms;
580 cms = CMS_EnvelopedData_create(cipher);
583 for (i = 0; i < sk_X509_num(certs); i++)
585 recip = sk_X509_value(certs, i);
586 if (!CMS_add1_recipient_cert(cms, recip, flags))
588 CMSerr(CMS_F_CMS_ENCRYPT, CMS_R_RECIPIENT_ERROR);
593 if(!(flags & CMS_DETACHED))
594 CMS_set_detached(cms, 0);
596 if ((flags & (CMS_STREAM|CMS_PARTIAL))
597 || CMS_final(cms, data, NULL, flags))
603 CMSerr(CMS_F_CMS_ENCRYPT, ERR_R_MALLOC_FAILURE);
606 CMS_ContentInfo_free(cms);
610 static int cms_kari_set1_pkey(CMS_ContentInfo *cms, CMS_RecipientInfo *ri,
611 EVP_PKEY *pk, X509 *cert)
614 STACK_OF(CMS_RecipientEncryptedKey) *reks;
615 CMS_RecipientEncryptedKey *rek;
616 reks = CMS_RecipientInfo_kari_get0_reks(ri);
619 for (i = 0; i < sk_CMS_RecipientEncryptedKey_num(reks); i++)
622 rek = sk_CMS_RecipientEncryptedKey_value(reks, i);
623 if (CMS_RecipientEncryptedKey_cert_cmp(rek, cert))
625 CMS_RecipientInfo_kari_set0_pkey(ri, pk);
626 rv = CMS_RecipientInfo_kari_decrypt(cms, ri, rek);
627 CMS_RecipientInfo_kari_set0_pkey(ri, NULL);
635 int CMS_decrypt_set1_pkey(CMS_ContentInfo *cms, EVP_PKEY *pk, X509 *cert)
637 STACK_OF(CMS_RecipientInfo) *ris;
638 CMS_RecipientInfo *ri;
640 int debug = 0, match_ri = 0;
641 ris = CMS_get0_RecipientInfos(cms);
643 debug = cms->d.envelopedData->encryptedContentInfo->debug;
644 ri_type = cms_pkey_get_ri_type(pk);
645 if (ri_type == CMS_RECIPINFO_NONE)
647 CMSerr(CMS_F_CMS_DECRYPT_SET1_PKEY,
648 CMS_R_NOT_SUPPORTED_FOR_THIS_KEY_TYPE);
652 for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++)
654 ri = sk_CMS_RecipientInfo_value(ris, i);
655 if (CMS_RecipientInfo_type(ri) != ri_type)
658 if (ri_type == CMS_RECIPINFO_AGREE)
660 r = cms_kari_set1_pkey(cms, ri, pk, cert);
666 /* If we have a cert try matching RecipientInfo
667 * otherwise try them all.
669 else if (!cert || !CMS_RecipientInfo_ktri_cert_cmp(ri, cert))
671 CMS_RecipientInfo_set0_pkey(ri, pk);
672 r = CMS_RecipientInfo_decrypt(cms, ri);
673 CMS_RecipientInfo_set0_pkey(ri, NULL);
676 /* If not debugging clear any error and
677 * return success to avoid leaking of
678 * information useful to MMA
687 CMSerr(CMS_F_CMS_DECRYPT_SET1_PKEY,
688 CMS_R_DECRYPT_ERROR);
691 /* If no cert and not debugging don't leave loop
692 * after first successful decrypt. Always attempt
693 * to decrypt all recipients to avoid leaking timing
694 * of a successful decrypt.
696 else if (r > 0 && debug)
700 /* If no cert and not debugging always return success */
701 if (match_ri && !cert && !debug)
707 CMSerr(CMS_F_CMS_DECRYPT_SET1_PKEY, CMS_R_NO_MATCHING_RECIPIENT);
712 int CMS_decrypt_set1_key(CMS_ContentInfo *cms,
713 unsigned char *key, size_t keylen,
714 unsigned char *id, size_t idlen)
716 STACK_OF(CMS_RecipientInfo) *ris;
717 CMS_RecipientInfo *ri;
719 ris = CMS_get0_RecipientInfos(cms);
720 for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++)
722 ri = sk_CMS_RecipientInfo_value(ris, i);
723 if (CMS_RecipientInfo_type(ri) != CMS_RECIPINFO_KEK)
726 /* If we have an id try matching RecipientInfo
727 * otherwise try them all.
729 if (!id || (CMS_RecipientInfo_kekri_id_cmp(ri, id, idlen) == 0))
731 CMS_RecipientInfo_set0_key(ri, key, keylen);
732 r = CMS_RecipientInfo_decrypt(cms, ri);
733 CMS_RecipientInfo_set0_key(ri, NULL, 0);
738 CMSerr(CMS_F_CMS_DECRYPT_SET1_KEY,
739 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++)
760 ri = sk_CMS_RecipientInfo_value(ris, i);
761 if (CMS_RecipientInfo_type(ri) != CMS_RECIPINFO_PASS)
763 CMS_RecipientInfo_set0_password(ri, pass, passlen);
764 r = CMS_RecipientInfo_decrypt(cms, ri);
765 CMS_RecipientInfo_set0_password(ri, NULL, 0);
770 CMSerr(CMS_F_CMS_DECRYPT_SET1_PASSWORD, CMS_R_NO_MATCHING_RECIPIENT);
775 int CMS_decrypt(CMS_ContentInfo *cms, EVP_PKEY *pk, X509 *cert,
776 BIO *dcont, BIO *out,
781 if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_enveloped)
783 CMSerr(CMS_F_CMS_DECRYPT, CMS_R_TYPE_NOT_ENVELOPED_DATA);
786 if (!dcont && !check_content(cms))
788 if (flags & CMS_DEBUG_DECRYPT)
789 cms->d.envelopedData->encryptedContentInfo->debug = 1;
791 cms->d.envelopedData->encryptedContentInfo->debug = 0;
792 if (!pk && !cert && !dcont && !out)
794 if (pk && !CMS_decrypt_set1_pkey(cms, pk, cert))
796 cont = CMS_dataInit(cms, dcont);
799 r = cms_copy_content(out, cont, flags);
800 do_free_upto(cont, dcont);
804 int CMS_final(CMS_ContentInfo *cms, BIO *data, BIO *dcont, unsigned int flags)
808 if (!(cmsbio = CMS_dataInit(cms, dcont)))
810 CMSerr(CMS_F_CMS_FINAL,ERR_R_MALLOC_FAILURE);
814 SMIME_crlf_copy(data, cmsbio, flags);
816 (void)BIO_flush(cmsbio);
819 if (!CMS_dataFinal(cms, cmsbio))
821 CMSerr(CMS_F_CMS_FINAL,CMS_R_CMS_DATAFINAL_ERROR);
828 do_free_upto(cmsbio, dcont);
836 int CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
841 if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_id_smime_ct_compressedData)
843 CMSerr(CMS_F_CMS_UNCOMPRESS,
844 CMS_R_TYPE_NOT_COMPRESSED_DATA);
848 if (!dcont && !check_content(cms))
851 cont = CMS_dataInit(cms, dcont);
854 r = cms_copy_content(out, cont, flags);
855 do_free_upto(cont, dcont);
859 CMS_ContentInfo *CMS_compress(BIO *in, int comp_nid, unsigned int flags)
861 CMS_ContentInfo *cms;
863 comp_nid = NID_zlib_compression;
864 cms = cms_CompressedData_create(comp_nid);
868 if(!(flags & CMS_DETACHED))
869 CMS_set_detached(cms, 0);
871 if ((flags & CMS_STREAM) || CMS_final(cms, in, NULL, flags))
874 CMS_ContentInfo_free(cms);
880 int CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
883 CMSerr(CMS_F_CMS_UNCOMPRESS, CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
887 CMS_ContentInfo *CMS_compress(BIO *in, int comp_nid, unsigned int flags)
889 CMSerr(CMS_F_CMS_COMPRESS, CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);