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 static void do_free_upto(BIO
*f
, BIO
*upto
)
145 int CMS_data(CMS_ContentInfo
*cms
, BIO
*out
, unsigned int flags
)
149 if (OBJ_obj2nid(CMS_get0_type(cms
)) != NID_pkcs7_data
)
151 CMSerr(CMS_F_CMS_DATA
, CMS_R_TYPE_NOT_DATA
);
154 cont
= CMS_dataInit(cms
, NULL
);
157 r
= cms_copy_content(out
, cont
, flags
);
162 CMS_ContentInfo
*CMS_data_create(BIO
*in
, unsigned int flags
)
164 CMS_ContentInfo
*cms
;
165 cms
= cms_Data_create();
169 if (CMS_final(cms
, in
, NULL
, flags
))
172 CMS_ContentInfo_free(cms
);
177 int CMS_digest_verify(CMS_ContentInfo
*cms
, BIO
*dcont
, BIO
*out
,
182 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
))
213 flags
&= ~CMS_STREAM
;
214 CMS_set_detached(cms
, 0);
217 if ((flags
& CMS_STREAM
) || CMS_final(cms
, in
, NULL
, flags
))
220 CMS_ContentInfo_free(cms
);
224 int CMS_EncryptedData_decrypt(CMS_ContentInfo
*cms
,
225 const unsigned char *key
, size_t keylen
,
226 BIO
*dcont
, BIO
*out
, unsigned int flags
)
230 if (OBJ_obj2nid(CMS_get0_type(cms
)) != NID_pkcs7_encrypted
)
232 CMSerr(CMS_F_CMS_ENCRYPTEDDATA_DECRYPT
,
233 CMS_R_TYPE_NOT_ENCRYPTED_DATA
);
237 if (!dcont
&& !check_content(cms
))
240 if (CMS_EncryptedData_set1_key(cms
, NULL
, key
, keylen
) <= 0)
242 cont
= CMS_dataInit(cms
, dcont
);
245 r
= cms_copy_content(out
, cont
, flags
);
246 do_free_upto(cont
, dcont
);
250 CMS_ContentInfo
*CMS_EncryptedData_encrypt(BIO
*in
, const EVP_CIPHER
*cipher
,
251 const unsigned char *key
, size_t keylen
,
254 CMS_ContentInfo
*cms
;
257 CMSerr(CMS_F_CMS_ENCRYPTEDDATA_ENCRYPT
, CMS_R_NO_CIPHER
);
260 cms
= CMS_ContentInfo_new();
263 if (!CMS_EncryptedData_set1_key(cms
, cipher
, key
, keylen
))
266 if(!(flags
& CMS_DETACHED
))
268 flags
&= ~CMS_STREAM
;
269 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_purpose(&ctx
, X509_PURPOSE_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
))
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 r
= CMS_verify(rcms
, certs
, store
, NULL
, NULL
, flags
);
457 return cms_Receipt_verify(rcms
, ocms
);
460 CMS_ContentInfo
*CMS_sign(X509
*signcert
, EVP_PKEY
*pkey
, STACK_OF(X509
) *certs
,
461 BIO
*data
, unsigned int flags
)
463 CMS_ContentInfo
*cms
;
466 cms
= CMS_ContentInfo_new();
467 if (!cms
|| !CMS_SignedData_init(cms
))
470 if (pkey
&& !CMS_add1_signer(cms
, signcert
, pkey
, NULL
, flags
))
472 CMSerr(CMS_F_CMS_SIGN
, CMS_R_ADD_SIGNER_ERROR
);
476 for (i
= 0; i
< sk_X509_num(certs
); i
++)
478 X509
*x
= sk_X509_value(certs
, i
);
479 if (!CMS_add1_cert(cms
, x
))
483 if(!(flags
& CMS_DETACHED
))
485 flags
&= ~CMS_STREAM
;
486 CMS_set_detached(cms
, 0);
489 if ((flags
& (CMS_STREAM
|CMS_PARTIAL
))
490 || CMS_final(cms
, data
, NULL
, flags
))
496 CMSerr(CMS_F_CMS_SIGN
, ERR_R_MALLOC_FAILURE
);
500 CMS_ContentInfo_free(cms
);
504 CMS_ContentInfo
*CMS_sign_receipt(CMS_SignerInfo
*si
,
505 X509
*signcert
, EVP_PKEY
*pkey
,
506 STACK_OF(X509
) *certs
,
509 CMS_SignerInfo
*rct_si
;
510 CMS_ContentInfo
*cms
= NULL
;
511 ASN1_OCTET_STRING
**pos
, *os
;
512 BIO
*rct_cont
= NULL
;
515 flags
&= ~CMS_STREAM
;
516 /* Not really detached but avoids content being allocated */
517 flags
|= CMS_PARTIAL
|CMS_BINARY
|CMS_DETACHED
;
518 if (!pkey
|| !signcert
)
520 CMSerr(CMS_F_CMS_SIGN_RECEIPT
, CMS_R_NO_KEY_OR_CERT
);
524 /* Initialize signed data */
526 cms
= CMS_sign(NULL
, NULL
, certs
, NULL
, flags
);
530 /* Set inner content type to signed receipt */
531 if (!CMS_set1_eContentType(cms
, OBJ_nid2obj(NID_id_smime_ct_receipt
)))
534 rct_si
= CMS_add1_signer(cms
, signcert
, pkey
, NULL
, flags
);
537 CMSerr(CMS_F_CMS_SIGN_RECEIPT
, CMS_R_ADD_SIGNER_ERROR
);
541 os
= cms_encode_Receipt(si
);
546 /* Set content to digest */
547 rct_cont
= BIO_new_mem_buf(os
->data
, os
->length
);
551 /* Add msgSigDigest attribute */
553 if (!cms_msgSigDigest_add1(rct_si
, si
))
556 /* Finalize structure */
557 if (!CMS_final(cms
, rct_cont
, NULL
, flags
))
560 /* Set embedded content */
561 pos
= CMS_get0_content(cms
);
571 CMS_ContentInfo_free(cms
);
576 CMS_ContentInfo
*CMS_encrypt(STACK_OF(X509
) *certs
, BIO
*data
,
577 const EVP_CIPHER
*cipher
, unsigned int flags
)
579 CMS_ContentInfo
*cms
;
582 cms
= CMS_EnvelopedData_create(cipher
);
585 for (i
= 0; i
< sk_X509_num(certs
); i
++)
587 recip
= sk_X509_value(certs
, i
);
588 if (!CMS_add1_recipient_cert(cms
, recip
, flags
))
590 CMSerr(CMS_F_CMS_ENCRYPT
, CMS_R_RECIPIENT_ERROR
);
595 if(!(flags
& CMS_DETACHED
))
597 flags
&= ~CMS_STREAM
;
598 CMS_set_detached(cms
, 0);
601 if ((flags
& (CMS_STREAM
|CMS_PARTIAL
))
602 || CMS_final(cms
, data
, NULL
, flags
))
608 CMSerr(CMS_F_CMS_ENCRYPT
, ERR_R_MALLOC_FAILURE
);
611 CMS_ContentInfo_free(cms
);
615 int CMS_decrypt_set1_pkey(CMS_ContentInfo
*cms
, EVP_PKEY
*pk
, X509
*cert
)
617 STACK_OF(CMS_RecipientInfo
) *ris
;
618 CMS_RecipientInfo
*ri
;
620 ris
= CMS_get0_RecipientInfos(cms
);
621 for (i
= 0; i
< sk_CMS_RecipientInfo_num(ris
); i
++)
623 ri
= sk_CMS_RecipientInfo_value(ris
, i
);
624 if (CMS_RecipientInfo_type(ri
) != CMS_RECIPINFO_TRANS
)
626 /* If we have a cert try matching RecipientInfo
627 * otherwise try them all.
629 if (!cert
|| (CMS_RecipientInfo_ktri_cert_cmp(ri
, cert
) == 0))
631 CMS_RecipientInfo_set0_pkey(ri
, pk
);
632 r
= CMS_RecipientInfo_decrypt(cms
, ri
);
633 CMS_RecipientInfo_set0_pkey(ri
, NULL
);
638 CMSerr(CMS_F_CMS_DECRYPT_SET1_PKEY
,
639 CMS_R_DECRYPT_ERROR
);
646 CMSerr(CMS_F_CMS_DECRYPT_SET1_PKEY
, CMS_R_NO_MATCHING_RECIPIENT
);
651 int CMS_decrypt_set1_key(CMS_ContentInfo
*cms
,
652 unsigned char *key
, size_t keylen
,
653 unsigned char *id
, size_t idlen
)
655 STACK_OF(CMS_RecipientInfo
) *ris
;
656 CMS_RecipientInfo
*ri
;
658 ris
= CMS_get0_RecipientInfos(cms
);
659 for (i
= 0; i
< sk_CMS_RecipientInfo_num(ris
); i
++)
661 ri
= sk_CMS_RecipientInfo_value(ris
, i
);
662 if (CMS_RecipientInfo_type(ri
) != CMS_RECIPINFO_KEK
)
665 /* If we have an id try matching RecipientInfo
666 * otherwise try them all.
668 if (!id
|| (CMS_RecipientInfo_kekri_id_cmp(ri
, id
, idlen
) == 0))
670 CMS_RecipientInfo_set0_key(ri
, key
, keylen
);
671 r
= CMS_RecipientInfo_decrypt(cms
, ri
);
672 CMS_RecipientInfo_set0_key(ri
, NULL
, 0);
677 CMSerr(CMS_F_CMS_DECRYPT_SET1_KEY
,
678 CMS_R_DECRYPT_ERROR
);
685 CMSerr(CMS_F_CMS_DECRYPT_SET1_KEY
, CMS_R_NO_MATCHING_RECIPIENT
);
690 int CMS_decrypt(CMS_ContentInfo
*cms
, EVP_PKEY
*pk
, X509
*cert
,
691 BIO
*dcont
, BIO
*out
,
696 if (OBJ_obj2nid(CMS_get0_type(cms
)) != NID_pkcs7_enveloped
)
698 CMSerr(CMS_F_CMS_DECRYPT
, CMS_R_TYPE_NOT_ENVELOPED_DATA
);
701 if (!dcont
&& !check_content(cms
))
703 if (pk
&& !CMS_decrypt_set1_pkey(cms
, pk
, cert
))
706 cont
= CMS_dataInit(cms
, dcont
);
709 r
= cms_copy_content(out
, cont
, flags
);
710 do_free_upto(cont
, dcont
);
714 int CMS_final(CMS_ContentInfo
*cms
, BIO
*data
, BIO
*dcont
, unsigned int flags
)
718 if (!(cmsbio
= CMS_dataInit(cms
, dcont
)))
720 CMSerr(CMS_F_CMS_FINAL
,ERR_R_MALLOC_FAILURE
);
724 SMIME_crlf_copy(data
, cmsbio
, flags
);
726 (void)BIO_flush(cmsbio
);
729 if (!CMS_dataFinal(cms
, cmsbio
))
731 CMSerr(CMS_F_CMS_FINAL
,CMS_R_CMS_DATAFINAL_ERROR
);
738 do_free_upto(cmsbio
, dcont
);
746 int CMS_uncompress(CMS_ContentInfo
*cms
, BIO
*dcont
, BIO
*out
,
751 if (OBJ_obj2nid(CMS_get0_type(cms
)) != NID_id_smime_ct_compressedData
)
753 CMSerr(CMS_F_CMS_UNCOMPRESS
,
754 CMS_R_TYPE_NOT_COMPRESSED_DATA
);
758 if (!dcont
&& !check_content(cms
))
761 cont
= CMS_dataInit(cms
, dcont
);
764 r
= cms_copy_content(out
, cont
, flags
);
765 do_free_upto(cont
, dcont
);
769 CMS_ContentInfo
*CMS_compress(BIO
*in
, int comp_nid
, unsigned int flags
)
771 CMS_ContentInfo
*cms
;
773 comp_nid
= NID_zlib_compression
;
774 cms
= cms_CompressedData_create(comp_nid
);
778 if(!(flags
& CMS_DETACHED
))
780 flags
&= ~CMS_STREAM
;
781 CMS_set_detached(cms
, 0);
784 if (CMS_final(cms
, in
, NULL
, flags
))
787 CMS_ContentInfo_free(cms
);
793 int CMS_uncompress(CMS_ContentInfo
*cms
, BIO
*dcont
, BIO
*out
,
796 CMSerr(CMS_F_CMS_UNCOMPRESS
, CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM
);
800 CMS_ContentInfo
*CMS_compress(BIO
*in
, int comp_nid
, unsigned int flags
)
802 CMSerr(CMS_F_CMS_COMPRESS
, CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM
);