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>
62 static int cms_copy_content(BIO
*out
, BIO
*in
, unsigned int flags
)
64 unsigned char buf
[4096];
69 tmpout
= BIO_new(BIO_s_null());
70 else if (flags
& CMS_TEXT
)
71 tmpout
= BIO_new(BIO_s_mem());
77 CMSerr(CMS_F_CMS_COPY_CONTENT
,ERR_R_MALLOC_FAILURE
);
81 /* Read all content through chain to process digest, decrypt etc */
84 i
=BIO_read(in
,buf
,sizeof(buf
));
87 if (BIO_method_type(in
) == BIO_TYPE_CIPHER
)
89 if (!BIO_get_cipher_status(in
))
96 BIO_write(tmpout
, buf
, i
);
101 if(!SMIME_text(tmpout
, out
))
103 CMSerr(CMS_F_CMS_COPY_CONTENT
,CMS_R_SMIME_TEXT_ERROR
);
111 if (tmpout
&& (tmpout
!= out
))
117 static int check_content(CMS_ContentInfo
*cms
)
119 ASN1_OCTET_STRING
**pos
= CMS_get0_content(cms
);
122 CMSerr(CMS_F_CHECK_CONTENT
, CMS_R_NO_CONTENT
);
128 int CMS_data(CMS_ContentInfo
*cms
, BIO
*out
, unsigned int flags
)
132 if (OBJ_obj2nid(CMS_get0_type(cms
)) != NID_pkcs7_data
)
134 CMSerr(CMS_F_CMS_DATA
, CMS_R_TYPE_NOT_DATA
);
137 cont
= CMS_dataInit(cms
, NULL
);
140 r
= cms_copy_content(out
, cont
, flags
);
145 CMS_ContentInfo
*CMS_data_create(BIO
*in
, unsigned int flags
)
147 CMS_ContentInfo
*cms
;
148 cms
= cms_Data_create();
152 if ((flags
& CMS_STREAM
) || CMS_final(cms
, in
, NULL
, flags
))
155 CMS_ContentInfo_free(cms
);
160 int CMS_digest_verify(CMS_ContentInfo
*cms
, BIO
*dcont
, BIO
*out
,
165 if (OBJ_obj2nid(CMS_get0_type(cms
)) != NID_pkcs7_digest
)
167 CMSerr(CMS_F_CMS_DIGEST_VERIFY
, CMS_R_TYPE_NOT_DIGESTED_DATA
);
171 if (!dcont
&& !check_content(cms
))
174 cont
= CMS_dataInit(cms
, dcont
);
177 r
= cms_copy_content(out
, cont
, flags
);
179 r
= cms_DigestedData_do_final(cms
, cont
, 1);
184 CMS_ContentInfo
*CMS_digest_create(BIO
*in
, const EVP_MD
*md
,
187 CMS_ContentInfo
*cms
;
190 cms
= cms_DigestedData_create(md
);
194 if(!(flags
& CMS_DETACHED
))
195 CMS_set_detached(cms
, 0);
197 if ((flags
& CMS_STREAM
) || CMS_final(cms
, in
, NULL
, flags
))
200 CMS_ContentInfo_free(cms
);
204 int CMS_EncryptedData_decrypt(CMS_ContentInfo
*cms
,
205 const unsigned char *key
, size_t keylen
,
206 BIO
*dcont
, BIO
*out
, unsigned int flags
)
210 if (OBJ_obj2nid(CMS_get0_type(cms
)) != NID_pkcs7_encrypted
)
212 CMSerr(CMS_F_CMS_ENCRYPTEDDATA_DECRYPT
,
213 CMS_R_TYPE_NOT_ENCRYPTED_DATA
);
217 if (!dcont
&& !check_content(cms
))
220 if (CMS_EncryptedData_set1_key(cms
, NULL
, key
, keylen
) <= 0)
222 cont
= CMS_dataInit(cms
, dcont
);
225 r
= cms_copy_content(out
, cont
, flags
);
230 CMS_ContentInfo
*CMS_EncryptedData_encrypt(BIO
*in
, const EVP_CIPHER
*cipher
,
231 const unsigned char *key
, size_t keylen
,
234 CMS_ContentInfo
*cms
;
237 CMSerr(CMS_F_CMS_ENCRYPTEDDATA_ENCRYPT
, CMS_R_NO_CIPHER
);
240 cms
= CMS_ContentInfo_new();
243 if (!CMS_EncryptedData_set1_key(cms
, cipher
, key
, keylen
))
246 if(!(flags
& CMS_DETACHED
))
247 CMS_set_detached(cms
, 0);
249 if ((flags
& (CMS_STREAM
|CMS_PARTIAL
))
250 || CMS_final(cms
, in
, NULL
, flags
))
253 CMS_ContentInfo_free(cms
);
257 static int cms_signerinfo_verify_cert(CMS_SignerInfo
*si
,
259 STACK_OF(X509
) *certs
,
260 STACK_OF(X509_CRL
) *crls
,
266 CMS_SignerInfo_get0_algs(si
, NULL
, &signer
, NULL
, NULL
);
267 if (!X509_STORE_CTX_init(&ctx
, store
, signer
, certs
))
269 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CERT
,
270 CMS_R_STORE_INIT_ERROR
);
273 X509_STORE_CTX_set_purpose(&ctx
, X509_PURPOSE_SMIME_SIGN
);
275 X509_STORE_CTX_set0_crls(&ctx
, crls
);
277 i
= X509_verify_cert(&ctx
);
280 j
= X509_STORE_CTX_get_error(&ctx
);
281 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CERT
,
282 CMS_R_CERTIFICATE_VERIFY_ERROR
);
283 ERR_add_error_data(2, "Verify error:",
284 X509_verify_cert_error_string(j
));
289 X509_STORE_CTX_cleanup(&ctx
);
294 int CMS_verify(CMS_ContentInfo
*cms
, STACK_OF(X509
) *certs
,
295 X509_STORE
*store
, BIO
*dcont
, BIO
*out
, unsigned int flags
)
298 STACK_OF(CMS_SignerInfo
) *sinfos
;
299 STACK_OF(X509
) *cms_certs
= NULL
;
300 STACK_OF(X509_CRL
) *crls
= NULL
;
302 int i
, scount
= 0, ret
= 0;
303 BIO
*cmsbio
= NULL
, *tmpin
= NULL
;
305 if (!dcont
&& !check_content(cms
))
308 /* Attempt to find all signer certificates */
310 sinfos
= CMS_get0_SignerInfos(cms
);
312 if (sk_CMS_SignerInfo_num(sinfos
) <= 0)
314 CMSerr(CMS_F_CMS_VERIFY
, CMS_R_NO_SIGNERS
);
318 for (i
= 0; i
< sk_CMS_SignerInfo_num(sinfos
); i
++)
320 si
= sk_CMS_SignerInfo_value(sinfos
, i
);
321 CMS_SignerInfo_get0_algs(si
, NULL
, &signer
, NULL
, NULL
);
326 if (scount
!= sk_CMS_SignerInfo_num(sinfos
))
327 scount
+= CMS_set1_signers_certs(cms
, certs
, flags
);
329 if (scount
!= sk_CMS_SignerInfo_num(sinfos
))
331 CMSerr(CMS_F_CMS_VERIFY
, CMS_R_SIGNER_CERTIFICATE_NOT_FOUND
);
335 /* Attempt to verify all signers certs */
337 if (!(flags
& CMS_NO_SIGNER_CERT_VERIFY
))
339 cms_certs
= CMS_get1_certs(cms
);
340 if (!(flags
& CMS_NOCRL
))
341 crls
= CMS_get1_crls(cms
);
342 for (i
= 0; i
< sk_CMS_SignerInfo_num(sinfos
); i
++)
344 si
= sk_CMS_SignerInfo_value(sinfos
, i
);
345 if (!cms_signerinfo_verify_cert(si
, store
,
346 cms_certs
, crls
, flags
))
351 /* Attempt to verify all SignerInfo signed attribute signatures */
353 if (!(flags
& CMS_NO_ATTR_VERIFY
))
355 for (i
= 0; i
< sk_CMS_SignerInfo_num(sinfos
); i
++)
357 si
= sk_CMS_SignerInfo_value(sinfos
, i
);
358 if (CMS_signed_get_attr_count(si
) < 0)
360 if (CMS_SignerInfo_verify(si
) <= 0)
365 /* Performance optimization: if the content is a memory BIO then
366 * store its contents in a temporary read only memory BIO. This
367 * avoids potentially large numbers of slow copies of data which will
368 * occur when reading from a read write memory BIO when signatures
372 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
);
380 CMSerr(CMS_F_CMS_VERIFY
,ERR_R_MALLOC_FAILURE
);
388 cmsbio
=CMS_dataInit(cms
, tmpin
);
392 if (!cms_copy_content(out
, cmsbio
, flags
))
395 if (!(flags
& CMS_NO_CONTENT_VERIFY
))
397 for (i
= 0; i
< sk_CMS_SignerInfo_num(sinfos
); i
++)
399 si
= sk_CMS_SignerInfo_value(sinfos
, i
);
400 if (!CMS_SignerInfo_verify_content(si
, cmsbio
))
402 CMSerr(CMS_F_CMS_VERIFY
,
403 CMS_R_CONTENT_VERIFY_ERROR
);
413 if (dcont
&& (tmpin
== dcont
))
415 BIO_free_all(cmsbio
);
418 sk_X509_pop_free(cms_certs
, X509_free
);
420 sk_X509_CRL_pop_free(crls
, X509_CRL_free
);
425 int CMS_verify_receipt(CMS_ContentInfo
*rcms
, CMS_ContentInfo
*ocms
,
426 STACK_OF(X509
) *certs
,
427 X509_STORE
*store
, unsigned int flags
)
430 flags
&= ~(CMS_DETACHED
|CMS_TEXT
);
431 r
= CMS_verify(rcms
, certs
, store
, NULL
, NULL
, flags
);
434 return cms_Receipt_verify(rcms
, ocms
);
437 CMS_ContentInfo
*CMS_sign(X509
*signcert
, EVP_PKEY
*pkey
, STACK_OF(X509
) *certs
,
438 BIO
*data
, unsigned int flags
)
440 CMS_ContentInfo
*cms
;
442 cms
= CMS_ContentInfo_new();
445 if (pkey
&& !CMS_add1_signer(cms
, signcert
, pkey
, NULL
, flags
))
447 CMSerr(CMS_F_CMS_SIGN
, CMS_R_ADD_SIGNER_ERROR
);
450 for (i
= 0; i
< sk_X509_num(certs
); i
++)
452 X509
*x
= sk_X509_value(certs
, i
);
453 if (!CMS_add1_cert(cms
, x
))
456 /* If no signer or certs initialize signedData */
457 if (!pkey
&& !i
&& !CMS_SignedData_init(cms
))
460 if(!(flags
& CMS_DETACHED
))
461 CMS_set_detached(cms
, 0);
463 if ((flags
& (CMS_STREAM
|CMS_PARTIAL
))
464 || CMS_final(cms
, data
, NULL
, flags
))
470 CMSerr(CMS_F_CMS_SIGN
, ERR_R_MALLOC_FAILURE
);
474 CMS_ContentInfo_free(cms
);
478 CMS_ContentInfo
*CMS_sign_receipt(CMS_SignerInfo
*si
,
479 X509
*signcert
, EVP_PKEY
*pkey
,
480 STACK_OF(X509
) *certs
,
483 CMS_SignerInfo
*rct_si
;
484 CMS_ContentInfo
*cms
= NULL
;
485 ASN1_OCTET_STRING
**pos
, *os
;
486 BIO
*rct_cont
= NULL
;
489 flags
&= ~(CMS_STREAM
|CMS_TEXT
);
490 /* Not really detached but avoids content being allocated */
491 flags
|= CMS_PARTIAL
|CMS_BINARY
|CMS_DETACHED
;
492 if (!pkey
|| !signcert
)
494 CMSerr(CMS_F_CMS_SIGN_RECEIPT
, CMS_R_NO_KEY_OR_CERT
);
498 /* Initialize signed data */
500 cms
= CMS_sign(NULL
, NULL
, certs
, NULL
, flags
);
504 /* Set inner content type to signed receipt */
505 if (!CMS_set1_eContentType(cms
, OBJ_nid2obj(NID_id_smime_ct_receipt
)))
508 rct_si
= CMS_add1_signer(cms
, signcert
, pkey
, NULL
, flags
);
511 CMSerr(CMS_F_CMS_SIGN_RECEIPT
, CMS_R_ADD_SIGNER_ERROR
);
515 os
= cms_encode_Receipt(si
);
520 /* Set content to digest */
521 rct_cont
= BIO_new_mem_buf(os
->data
, os
->length
);
525 /* Add msgSigDigest attribute */
527 if (!cms_msgSigDigest_add1(rct_si
, si
))
530 /* Finalize structure */
531 if (!CMS_final(cms
, rct_cont
, NULL
, flags
))
534 /* Set embedded content */
535 pos
= CMS_get0_content(cms
);
545 CMS_ContentInfo_free(cms
);
550 CMS_ContentInfo
*CMS_encrypt(STACK_OF(X509
) *certs
, BIO
*data
,
551 const EVP_CIPHER
*cipher
, unsigned int flags
)
553 CMS_ContentInfo
*cms
;
556 cms
= CMS_EnvelopedData_create(cipher
);
559 for (i
= 0; i
< sk_X509_num(certs
); i
++)
561 recip
= sk_X509_value(certs
, i
);
562 if (!CMS_add1_recipient_cert(cms
, recip
, flags
))
564 CMSerr(CMS_F_CMS_ENCRYPT
, CMS_R_RECIPIENT_ERROR
);
569 if(!(flags
& CMS_DETACHED
))
570 CMS_set_detached(cms
, 0);
572 if ((flags
& (CMS_STREAM
|CMS_PARTIAL
))
573 || CMS_final(cms
, data
, NULL
, flags
))
579 CMSerr(CMS_F_CMS_ENCRYPT
, ERR_R_MALLOC_FAILURE
);
582 CMS_ContentInfo_free(cms
);
586 int CMS_decrypt_set1_pkey(CMS_ContentInfo
*cms
, EVP_PKEY
*pk
, X509
*cert
)
588 STACK_OF(CMS_RecipientInfo
) *ris
;
589 CMS_RecipientInfo
*ri
;
591 ris
= CMS_get0_RecipientInfos(cms
);
592 for (i
= 0; i
< sk_CMS_RecipientInfo_num(ris
); i
++)
594 ri
= sk_CMS_RecipientInfo_value(ris
, i
);
595 if (CMS_RecipientInfo_type(ri
) != CMS_RECIPINFO_TRANS
)
597 /* If we have a cert try matching RecipientInfo
598 * otherwise try them all.
600 if (!cert
|| (CMS_RecipientInfo_ktri_cert_cmp(ri
, cert
) == 0))
602 CMS_RecipientInfo_set0_pkey(ri
, pk
);
603 r
= CMS_RecipientInfo_decrypt(cms
, ri
);
604 CMS_RecipientInfo_set0_pkey(ri
, NULL
);
609 CMSerr(CMS_F_CMS_DECRYPT_SET1_PKEY
,
610 CMS_R_DECRYPT_ERROR
);
617 CMSerr(CMS_F_CMS_DECRYPT_SET1_PKEY
, CMS_R_NO_MATCHING_RECIPIENT
);
622 int CMS_decrypt_set1_key(CMS_ContentInfo
*cms
,
623 unsigned char *key
, size_t keylen
,
624 unsigned char *id
, size_t idlen
)
626 STACK_OF(CMS_RecipientInfo
) *ris
;
627 CMS_RecipientInfo
*ri
;
629 ris
= CMS_get0_RecipientInfos(cms
);
630 for (i
= 0; i
< sk_CMS_RecipientInfo_num(ris
); i
++)
632 ri
= sk_CMS_RecipientInfo_value(ris
, i
);
633 if (CMS_RecipientInfo_type(ri
) != CMS_RECIPINFO_KEK
)
636 /* If we have an id try matching RecipientInfo
637 * otherwise try them all.
639 if (!id
|| (CMS_RecipientInfo_kekri_id_cmp(ri
, id
, idlen
) == 0))
641 CMS_RecipientInfo_set0_key(ri
, key
, keylen
);
642 r
= CMS_RecipientInfo_decrypt(cms
, ri
);
643 CMS_RecipientInfo_set0_key(ri
, NULL
, 0);
648 CMSerr(CMS_F_CMS_DECRYPT_SET1_KEY
,
649 CMS_R_DECRYPT_ERROR
);
656 CMSerr(CMS_F_CMS_DECRYPT_SET1_KEY
, CMS_R_NO_MATCHING_RECIPIENT
);
661 int CMS_decrypt(CMS_ContentInfo
*cms
, EVP_PKEY
*pk
, X509
*cert
,
662 BIO
*dcont
, BIO
*out
,
667 if (OBJ_obj2nid(CMS_get0_type(cms
)) != NID_pkcs7_enveloped
)
669 CMSerr(CMS_F_CMS_DECRYPT
, CMS_R_TYPE_NOT_ENVELOPED_DATA
);
672 if (!dcont
&& !check_content(cms
))
674 if (pk
&& !CMS_decrypt_set1_pkey(cms
, pk
, cert
))
677 cont
= CMS_dataInit(cms
, dcont
);
680 r
= cms_copy_content(out
, cont
, flags
);
685 int CMS_final(CMS_ContentInfo
*cms
, BIO
*data
, BIO
*dcont
, unsigned int flags
)
689 if (!(cmsbio
= CMS_dataInit(cms
, dcont
)))
691 CMSerr(CMS_F_CMS_FINAL
,ERR_R_MALLOC_FAILURE
);
695 SMIME_crlf_copy(data
, cmsbio
, flags
);
697 (void)BIO_flush(cmsbio
);
700 if (!CMS_dataFinal(cms
, cmsbio
))
702 CMSerr(CMS_F_CMS_FINAL
,CMS_R_CMS_DATAFINAL_ERROR
);
709 BIO_free_all(cmsbio
);
717 int CMS_uncompress(CMS_ContentInfo
*cms
, BIO
*dcont
, BIO
*out
,
722 if (OBJ_obj2nid(CMS_get0_type(cms
)) != NID_id_smime_ct_compressedData
)
724 CMSerr(CMS_F_CMS_UNCOMPRESS
,
725 CMS_R_TYPE_NOT_COMPRESSED_DATA
);
729 if (!dcont
&& !check_content(cms
))
732 cont
= CMS_dataInit(cms
, dcont
);
735 r
= cms_copy_content(out
, cont
, flags
);
740 CMS_ContentInfo
*CMS_compress(BIO
*in
, int comp_nid
, unsigned int flags
)
742 CMS_ContentInfo
*cms
;
744 comp_nid
= NID_zlib_compression
;
745 cms
= cms_CompressedData_create(comp_nid
);
749 if(!(flags
& CMS_DETACHED
))
750 CMS_set_detached(cms
, 0);
752 if ((flags
& CMS_STREAM
) || CMS_final(cms
, in
, NULL
, flags
))
755 CMS_ContentInfo_free(cms
);
761 int CMS_uncompress(CMS_ContentInfo
*cms
, BIO
*dcont
, BIO
*out
,
764 CMSerr(CMS_F_CMS_UNCOMPRESS
, CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM
);
768 CMS_ContentInfo
*CMS_compress(BIO
*in
, int comp_nid
, unsigned int flags
)
770 CMSerr(CMS_F_CMS_COMPRESS
, CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM
);