Import OpenSSL-1.0.1h.
[dragonfly.git] / crypto / openssl / crypto / cms / cms_smime.c
1 /* crypto/cms/cms_smime.c */
2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
3  * project.
4  */
5 /* ====================================================================
6  * Copyright (c) 2008 The OpenSSL Project.  All rights reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  *
12  * 1. Redistributions of source code must retain the above copyright
13  *    notice, this list of conditions and the following disclaimer. 
14  *
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
18  *    distribution.
19  *
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/)"
24  *
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.
29  *
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.
33  *
34  * 6. Redistributions of any form whatsoever must retain the following
35  *    acknowledgment:
36  *    "This product includes software developed by the OpenSSL Project
37  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38  *
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  * ====================================================================
52  */
53
54 #include "cryptlib.h"
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>
60 #include "cms_lcl.h"
61
62 static int cms_copy_content(BIO *out, BIO *in, unsigned int flags)
63         {
64         unsigned char buf[4096];
65         int r = 0, i;
66         BIO *tmpout = NULL;
67
68         if (out == NULL)
69                 tmpout = BIO_new(BIO_s_null());
70         else if (flags & CMS_TEXT)
71                 {
72                 tmpout = BIO_new(BIO_s_mem());
73                 BIO_set_mem_eof_return(tmpout, 0);
74                 }
75         else
76                 tmpout = out;
77
78         if(!tmpout)
79                 {
80                 CMSerr(CMS_F_CMS_COPY_CONTENT,ERR_R_MALLOC_FAILURE);
81                 goto err;
82                 }
83
84         /* Read all content through chain to process digest, decrypt etc */
85         for (;;)
86         {
87                 i=BIO_read(in,buf,sizeof(buf));
88                 if (i <= 0)
89                         {
90                         if (BIO_method_type(in) == BIO_TYPE_CIPHER)
91                                 {
92                                 if (!BIO_get_cipher_status(in))
93                                         goto err;
94                                 }
95                         if (i < 0)
96                                 goto err;
97                         break;
98                         }
99                                 
100                 if (tmpout && (BIO_write(tmpout, buf, i) != i))
101                         goto err;
102         }
103
104         if(flags & CMS_TEXT)
105                 {
106                 if(!SMIME_text(tmpout, out))
107                         {
108                         CMSerr(CMS_F_CMS_COPY_CONTENT,CMS_R_SMIME_TEXT_ERROR);
109                         goto err;
110                         }
111                 }
112
113         r = 1;
114
115         err:
116         if (tmpout && (tmpout != out))
117                 BIO_free(tmpout);
118         return r;
119
120         }
121
122 static int check_content(CMS_ContentInfo *cms)
123         {
124         ASN1_OCTET_STRING **pos = CMS_get0_content(cms);
125         if (!pos || !*pos)
126                 {
127                 CMSerr(CMS_F_CHECK_CONTENT, CMS_R_NO_CONTENT);
128                 return 0;
129                 }
130         return 1;
131         }
132
133 static void do_free_upto(BIO *f, BIO *upto)
134         {
135         if (upto)
136                 {
137                 BIO *tbio;
138                 do 
139                         {
140                         tbio = BIO_pop(f);
141                         BIO_free(f);
142                         f = tbio;
143                         }
144                 while (f != upto);
145                 }
146         else
147                 BIO_free_all(f);
148         }
149
150 int CMS_data(CMS_ContentInfo *cms, BIO *out, unsigned int flags)
151         {
152         BIO *cont;
153         int r;
154         if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_data)
155                 {
156                 CMSerr(CMS_F_CMS_DATA, CMS_R_TYPE_NOT_DATA);
157                 return 0;
158                 }
159         cont = CMS_dataInit(cms, NULL);
160         if (!cont)
161                 return 0;
162         r = cms_copy_content(out, cont, flags);
163         BIO_free_all(cont);
164         return r;
165         }
166
167 CMS_ContentInfo *CMS_data_create(BIO *in, unsigned int flags)
168         {
169         CMS_ContentInfo *cms;
170         cms = cms_Data_create();
171         if (!cms)
172                 return NULL;
173
174         if ((flags & CMS_STREAM) || CMS_final(cms, in, NULL, flags))
175                 return cms;
176
177         CMS_ContentInfo_free(cms);
178
179         return NULL;
180         }
181
182 int CMS_digest_verify(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
183                                                         unsigned int flags)
184         {
185         BIO *cont;
186         int r;
187         if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_digest)
188                 {
189                 CMSerr(CMS_F_CMS_DIGEST_VERIFY, CMS_R_TYPE_NOT_DIGESTED_DATA);
190                 return 0;
191                 }
192
193         if (!dcont && !check_content(cms))
194                 return 0;
195
196         cont = CMS_dataInit(cms, dcont);
197         if (!cont)
198                 return 0;
199         r = cms_copy_content(out, cont, flags);
200         if (r)
201                 r = cms_DigestedData_do_final(cms, cont, 1);
202         do_free_upto(cont, dcont);
203         return r;
204         }
205
206 CMS_ContentInfo *CMS_digest_create(BIO *in, const EVP_MD *md,
207                                         unsigned int flags)
208         {
209         CMS_ContentInfo *cms;
210         if (!md)
211                 md = EVP_sha1();
212         cms = cms_DigestedData_create(md);
213         if (!cms)
214                 return NULL;
215
216         if(!(flags & CMS_DETACHED))
217                 CMS_set_detached(cms, 0);
218
219         if ((flags & CMS_STREAM) || CMS_final(cms, in, NULL, flags))
220                 return cms;
221
222         CMS_ContentInfo_free(cms);
223         return NULL;
224         }
225
226 int CMS_EncryptedData_decrypt(CMS_ContentInfo *cms,
227                                 const unsigned char *key, size_t keylen,
228                                 BIO *dcont, BIO *out, unsigned int flags)
229         {
230         BIO *cont;
231         int r;
232         if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_encrypted)
233                 {
234                 CMSerr(CMS_F_CMS_ENCRYPTEDDATA_DECRYPT,
235                                         CMS_R_TYPE_NOT_ENCRYPTED_DATA);
236                 return 0;
237                 }
238
239         if (!dcont && !check_content(cms))
240                 return 0;
241
242         if (CMS_EncryptedData_set1_key(cms, NULL, key, keylen) <= 0)
243                 return 0;
244         cont = CMS_dataInit(cms, dcont);
245         if (!cont)
246                 return 0;
247         r = cms_copy_content(out, cont, flags);
248         do_free_upto(cont, dcont);
249         return r;
250         }
251
252 CMS_ContentInfo *CMS_EncryptedData_encrypt(BIO *in, const EVP_CIPHER *cipher,
253                                         const unsigned char *key, size_t keylen,
254                                         unsigned int flags)
255         {
256         CMS_ContentInfo *cms;
257         if (!cipher)
258                 {
259                 CMSerr(CMS_F_CMS_ENCRYPTEDDATA_ENCRYPT, CMS_R_NO_CIPHER);
260                 return NULL;
261                 }
262         cms = CMS_ContentInfo_new();
263         if (!cms)
264                 return NULL;
265         if (!CMS_EncryptedData_set1_key(cms, cipher, key, keylen))
266                 return NULL;
267
268         if(!(flags & CMS_DETACHED))
269                 CMS_set_detached(cms, 0);
270
271         if ((flags & (CMS_STREAM|CMS_PARTIAL))
272                 || CMS_final(cms, in, NULL, flags))
273                 return cms;
274
275         CMS_ContentInfo_free(cms);
276         return NULL;
277         }
278
279 static int cms_signerinfo_verify_cert(CMS_SignerInfo *si,
280                                         X509_STORE *store,
281                                         STACK_OF(X509) *certs,
282                                         STACK_OF(X509_CRL) *crls,
283                                         unsigned int flags)
284         {
285         X509_STORE_CTX ctx;
286         X509 *signer;
287         int i, j, r = 0;
288         CMS_SignerInfo_get0_algs(si, NULL, &signer, NULL, NULL);
289         if (!X509_STORE_CTX_init(&ctx, store, signer, certs))
290                 {
291                 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CERT,
292                                                 CMS_R_STORE_INIT_ERROR);
293                 goto err;
294                 }
295         X509_STORE_CTX_set_default(&ctx, "smime_sign");
296         if (crls)
297                 X509_STORE_CTX_set0_crls(&ctx, crls);
298
299         i = X509_verify_cert(&ctx);
300         if (i <= 0)
301                 {
302                 j = X509_STORE_CTX_get_error(&ctx);
303                 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CERT,
304                                                 CMS_R_CERTIFICATE_VERIFY_ERROR);
305                 ERR_add_error_data(2, "Verify error:",
306                                          X509_verify_cert_error_string(j));
307                 goto err;
308                 }
309         r = 1;
310         err:
311         X509_STORE_CTX_cleanup(&ctx);
312         return r;
313
314         }
315
316 int CMS_verify(CMS_ContentInfo *cms, STACK_OF(X509) *certs,
317                  X509_STORE *store, BIO *dcont, BIO *out, unsigned int flags)
318         {
319         CMS_SignerInfo *si;
320         STACK_OF(CMS_SignerInfo) *sinfos;
321         STACK_OF(X509) *cms_certs = NULL;
322         STACK_OF(X509_CRL) *crls = NULL;
323         X509 *signer;
324         int i, scount = 0, ret = 0;
325         BIO *cmsbio = NULL, *tmpin = NULL;
326
327         if (!dcont && !check_content(cms))
328                 return 0;
329
330         /* Attempt to find all signer certificates */
331
332         sinfos = CMS_get0_SignerInfos(cms);
333
334         if (sk_CMS_SignerInfo_num(sinfos) <= 0)
335                 {
336                 CMSerr(CMS_F_CMS_VERIFY, CMS_R_NO_SIGNERS);
337                 goto err;
338                 }
339
340         for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
341                 {
342                 si = sk_CMS_SignerInfo_value(sinfos, i);
343                 CMS_SignerInfo_get0_algs(si, NULL, &signer, NULL, NULL);
344                 if (signer)
345                         scount++;
346                 }
347
348         if (scount != sk_CMS_SignerInfo_num(sinfos))
349                 scount += CMS_set1_signers_certs(cms, certs, flags);
350
351         if (scount != sk_CMS_SignerInfo_num(sinfos))
352                 {
353                 CMSerr(CMS_F_CMS_VERIFY, CMS_R_SIGNER_CERTIFICATE_NOT_FOUND);
354                 goto err;
355                 }
356
357         /* Attempt to verify all signers certs */
358
359         if (!(flags & CMS_NO_SIGNER_CERT_VERIFY))
360                 {
361                 cms_certs = CMS_get1_certs(cms);
362                 if (!(flags & CMS_NOCRL))
363                         crls = CMS_get1_crls(cms);
364                 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
365                         {
366                         si = sk_CMS_SignerInfo_value(sinfos, i);
367                         if (!cms_signerinfo_verify_cert(si, store,
368                                                         cms_certs, crls, flags))
369                                 goto err;
370                         }
371                 }
372
373         /* Attempt to verify all SignerInfo signed attribute signatures */
374
375         if (!(flags & CMS_NO_ATTR_VERIFY))
376                 {
377                 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
378                         {
379                         si = sk_CMS_SignerInfo_value(sinfos, i);
380                         if (CMS_signed_get_attr_count(si) < 0)
381                                 continue;
382                         if (CMS_SignerInfo_verify(si) <= 0)
383                                 goto err;
384                         }
385                 }
386
387         /* Performance optimization: if the content is a memory BIO then
388          * store its contents in a temporary read only memory BIO. This
389          * avoids potentially large numbers of slow copies of data which will
390          * occur when reading from a read write memory BIO when signatures
391          * are calculated.
392          */
393
394         if (dcont && (BIO_method_type(dcont) == BIO_TYPE_MEM))
395                 {
396                 char *ptr;
397                 long len;
398                 len = BIO_get_mem_data(dcont, &ptr);
399                 tmpin = BIO_new_mem_buf(ptr, len);
400                 if (tmpin == NULL)
401                         {
402                         CMSerr(CMS_F_CMS_VERIFY,ERR_R_MALLOC_FAILURE);
403                         return 0;
404                         }
405                 }
406         else
407                 tmpin = dcont;
408                 
409
410         cmsbio=CMS_dataInit(cms, tmpin);
411         if (!cmsbio)
412                 goto err;
413
414         if (!cms_copy_content(out, cmsbio, flags))
415                 goto err;
416
417         if (!(flags & CMS_NO_CONTENT_VERIFY))
418                 {
419                 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
420                         {
421                         si = sk_CMS_SignerInfo_value(sinfos, i);
422                         if (CMS_SignerInfo_verify_content(si, cmsbio) <= 0)
423                                 {
424                                 CMSerr(CMS_F_CMS_VERIFY,
425                                         CMS_R_CONTENT_VERIFY_ERROR);
426                                 goto err;
427                                 }
428                         }
429                 }
430
431         ret = 1;
432
433         err:
434         
435         if (dcont && (tmpin == dcont))
436                 do_free_upto(cmsbio, dcont);
437         else
438                 BIO_free_all(cmsbio);
439
440         if (cms_certs)
441                 sk_X509_pop_free(cms_certs, X509_free);
442         if (crls)
443                 sk_X509_CRL_pop_free(crls, X509_CRL_free);
444
445         return ret;
446         }
447
448 int CMS_verify_receipt(CMS_ContentInfo *rcms, CMS_ContentInfo *ocms,
449                         STACK_OF(X509) *certs,
450                         X509_STORE *store, unsigned int flags)
451         {
452         int r;
453         flags &= ~(CMS_DETACHED|CMS_TEXT);
454         r = CMS_verify(rcms, certs, store, NULL, NULL, flags);
455         if (r <= 0)
456                 return r;
457         return cms_Receipt_verify(rcms, ocms);
458         }
459
460 CMS_ContentInfo *CMS_sign(X509 *signcert, EVP_PKEY *pkey, STACK_OF(X509) *certs,
461                                                 BIO *data, unsigned int flags)
462         {
463         CMS_ContentInfo *cms;
464         int i;
465
466         cms = CMS_ContentInfo_new();
467         if (!cms || !CMS_SignedData_init(cms))
468                 goto merr;
469
470         if (pkey && !CMS_add1_signer(cms, signcert, pkey, NULL, flags))
471                 {
472                 CMSerr(CMS_F_CMS_SIGN, CMS_R_ADD_SIGNER_ERROR);
473                 goto err;
474                 }
475
476         for (i = 0; i < sk_X509_num(certs); i++)
477                 {
478                 X509 *x = sk_X509_value(certs, i);
479                 if (!CMS_add1_cert(cms, x))
480                         goto merr;
481                 }
482
483         if(!(flags & CMS_DETACHED))
484                 CMS_set_detached(cms, 0);
485
486         if ((flags & (CMS_STREAM|CMS_PARTIAL))
487                 || CMS_final(cms, data, NULL, flags))
488                 return cms;
489         else
490                 goto err;
491
492         merr:
493         CMSerr(CMS_F_CMS_SIGN, ERR_R_MALLOC_FAILURE);
494
495         err:
496         if (cms)
497                 CMS_ContentInfo_free(cms);
498         return NULL;
499         }
500
501 CMS_ContentInfo *CMS_sign_receipt(CMS_SignerInfo *si,
502                                         X509 *signcert, EVP_PKEY *pkey,
503                                         STACK_OF(X509) *certs,
504                                         unsigned int flags)
505         {
506         CMS_SignerInfo *rct_si;
507         CMS_ContentInfo *cms = NULL;
508         ASN1_OCTET_STRING **pos, *os;
509         BIO *rct_cont = NULL;
510         int r = 0;
511
512         flags &= ~(CMS_STREAM|CMS_TEXT);
513         /* Not really detached but avoids content being allocated */
514         flags |= CMS_PARTIAL|CMS_BINARY|CMS_DETACHED;
515         if (!pkey || !signcert)
516                 {
517                 CMSerr(CMS_F_CMS_SIGN_RECEIPT, CMS_R_NO_KEY_OR_CERT);
518                 return NULL;
519                 }
520
521         /* Initialize signed data */
522
523         cms = CMS_sign(NULL, NULL, certs, NULL, flags);
524         if (!cms)
525                 goto err;
526
527         /* Set inner content type to signed receipt */
528         if (!CMS_set1_eContentType(cms, OBJ_nid2obj(NID_id_smime_ct_receipt)))
529                 goto err;
530
531         rct_si = CMS_add1_signer(cms, signcert, pkey, NULL, flags);
532         if (!rct_si)
533                 {
534                 CMSerr(CMS_F_CMS_SIGN_RECEIPT, CMS_R_ADD_SIGNER_ERROR);
535                 goto err;
536                 }
537
538         os = cms_encode_Receipt(si);
539
540         if (!os)
541                 goto err;
542
543         /* Set content to digest */
544         rct_cont = BIO_new_mem_buf(os->data, os->length);
545         if (!rct_cont)
546                 goto err;
547
548         /* Add msgSigDigest attribute */
549
550         if (!cms_msgSigDigest_add1(rct_si, si))
551                 goto err;
552
553         /* Finalize structure */
554         if (!CMS_final(cms, rct_cont, NULL, flags))
555                 goto err;
556
557         /* Set embedded content */
558         pos = CMS_get0_content(cms);
559         *pos = os;
560
561         r = 1;
562
563         err:
564         if (rct_cont)
565                 BIO_free(rct_cont);
566         if (r)
567                 return cms;
568         CMS_ContentInfo_free(cms);
569         return NULL;
570
571         }
572
573 CMS_ContentInfo *CMS_encrypt(STACK_OF(X509) *certs, BIO *data,
574                                 const EVP_CIPHER *cipher, unsigned int flags)
575         {
576         CMS_ContentInfo *cms;
577         int i;
578         X509 *recip;
579         cms = CMS_EnvelopedData_create(cipher);
580         if (!cms)
581                 goto merr;
582         for (i = 0; i < sk_X509_num(certs); i++)
583                 {
584                 recip = sk_X509_value(certs, i);
585                 if (!CMS_add1_recipient_cert(cms, recip, flags))
586                         {
587                         CMSerr(CMS_F_CMS_ENCRYPT, CMS_R_RECIPIENT_ERROR);
588                         goto err;
589                         }
590                 }
591
592         if(!(flags & CMS_DETACHED))
593                 CMS_set_detached(cms, 0);
594
595         if ((flags & (CMS_STREAM|CMS_PARTIAL))
596                 || CMS_final(cms, data, NULL, flags))
597                 return cms;
598         else
599                 goto err;
600
601         merr:
602         CMSerr(CMS_F_CMS_ENCRYPT, ERR_R_MALLOC_FAILURE);
603         err:
604         if (cms)
605                 CMS_ContentInfo_free(cms);
606         return NULL;
607         }
608
609 int CMS_decrypt_set1_pkey(CMS_ContentInfo *cms, EVP_PKEY *pk, X509 *cert)
610         {
611         STACK_OF(CMS_RecipientInfo) *ris;
612         CMS_RecipientInfo *ri;
613         int i, r;
614         int debug = 0, ri_match = 0;
615         ris = CMS_get0_RecipientInfos(cms);
616         if (ris)
617                 debug = cms->d.envelopedData->encryptedContentInfo->debug;
618         for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++)
619                 {
620                 ri = sk_CMS_RecipientInfo_value(ris, i);
621                 if (CMS_RecipientInfo_type(ri) != CMS_RECIPINFO_TRANS)
622                                 continue;
623                 ri_match = 1;
624                 /* If we have a cert try matching RecipientInfo
625                  * otherwise try them all.
626                  */
627                 if (!cert || (CMS_RecipientInfo_ktri_cert_cmp(ri, cert) == 0))
628                         {
629                         CMS_RecipientInfo_set0_pkey(ri, pk);
630                         r = CMS_RecipientInfo_decrypt(cms, ri);
631                         CMS_RecipientInfo_set0_pkey(ri, NULL);
632                         if (cert)
633                                 {
634                                 /* If not debugging clear any error and
635                                  * return success to avoid leaking of
636                                  * information useful to MMA
637                                  */
638                                 if (!debug)
639                                         {
640                                         ERR_clear_error();
641                                         return 1;
642                                         }
643                                 if (r > 0)
644                                         return 1;
645                                 CMSerr(CMS_F_CMS_DECRYPT_SET1_PKEY,
646                                                 CMS_R_DECRYPT_ERROR);
647                                 return 0;
648                                 }
649                         /* If no cert and not debugging don't leave loop
650                          * after first successful decrypt. Always attempt
651                          * to decrypt all recipients to avoid leaking timing
652                          * of a successful decrypt.
653                          */
654                         else if (r > 0 && debug)
655                                 return 1;
656                         }
657                 }
658         /* If no cert and not debugging always return success */
659         if (ri_match && !cert && !debug)
660                 {
661                 ERR_clear_error();
662                 return 1;
663                 }
664
665         CMSerr(CMS_F_CMS_DECRYPT_SET1_PKEY, CMS_R_NO_MATCHING_RECIPIENT);
666         return 0;
667
668         }
669
670 int CMS_decrypt_set1_key(CMS_ContentInfo *cms, 
671                                 unsigned char *key, size_t keylen,
672                                 unsigned char *id, size_t idlen)
673         {
674         STACK_OF(CMS_RecipientInfo) *ris;
675         CMS_RecipientInfo *ri;
676         int i, r;
677         ris = CMS_get0_RecipientInfos(cms);
678         for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++)
679                 {
680                 ri = sk_CMS_RecipientInfo_value(ris, i);
681                 if (CMS_RecipientInfo_type(ri) != CMS_RECIPINFO_KEK)
682                                 continue;
683
684                 /* If we have an id try matching RecipientInfo
685                  * otherwise try them all.
686                  */
687                 if (!id || (CMS_RecipientInfo_kekri_id_cmp(ri, id, idlen) == 0))
688                         {
689                         CMS_RecipientInfo_set0_key(ri, key, keylen);
690                         r = CMS_RecipientInfo_decrypt(cms, ri);
691                         CMS_RecipientInfo_set0_key(ri, NULL, 0);
692                         if (r > 0)
693                                 return 1;
694                         if (id)
695                                 {
696                                 CMSerr(CMS_F_CMS_DECRYPT_SET1_KEY,
697                                                 CMS_R_DECRYPT_ERROR);
698                                 return 0;
699                                 }
700                         ERR_clear_error();
701                         }
702                 }
703
704         CMSerr(CMS_F_CMS_DECRYPT_SET1_KEY, CMS_R_NO_MATCHING_RECIPIENT);
705         return 0;
706
707         }
708
709 int CMS_decrypt_set1_password(CMS_ContentInfo *cms, 
710                                 unsigned char *pass, ossl_ssize_t passlen)
711         {
712         STACK_OF(CMS_RecipientInfo) *ris;
713         CMS_RecipientInfo *ri;
714         int i, r;
715         ris = CMS_get0_RecipientInfos(cms);
716         for (i = 0; i < sk_CMS_RecipientInfo_num(ris); i++)
717                 {
718                 ri = sk_CMS_RecipientInfo_value(ris, i);
719                 if (CMS_RecipientInfo_type(ri) != CMS_RECIPINFO_PASS)
720                                 continue;
721                 CMS_RecipientInfo_set0_password(ri, pass, passlen);
722                 r = CMS_RecipientInfo_decrypt(cms, ri);
723                 CMS_RecipientInfo_set0_password(ri, NULL, 0);
724                 if (r > 0)
725                         return 1;
726                 }
727
728         CMSerr(CMS_F_CMS_DECRYPT_SET1_PASSWORD, CMS_R_NO_MATCHING_RECIPIENT);
729         return 0;
730
731         }
732         
733 int CMS_decrypt(CMS_ContentInfo *cms, EVP_PKEY *pk, X509 *cert,
734                                 BIO *dcont, BIO *out,
735                                 unsigned int flags)
736         {
737         int r;
738         BIO *cont;
739         if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_enveloped)
740                 {
741                 CMSerr(CMS_F_CMS_DECRYPT, CMS_R_TYPE_NOT_ENVELOPED_DATA);
742                 return 0;
743                 }
744         if (!dcont && !check_content(cms))
745                 return 0;
746         if (flags & CMS_DEBUG_DECRYPT)
747                 cms->d.envelopedData->encryptedContentInfo->debug = 1;
748         else
749                 cms->d.envelopedData->encryptedContentInfo->debug = 0;
750         if (!pk && !cert && !dcont && !out)
751                 return 1;
752         if (pk && !CMS_decrypt_set1_pkey(cms, pk, cert))
753                 return 0;
754         cont = CMS_dataInit(cms, dcont);
755         if (!cont)
756                 return 0;
757         r = cms_copy_content(out, cont, flags);
758         do_free_upto(cont, dcont);
759         return r;
760         }
761
762 int CMS_final(CMS_ContentInfo *cms, BIO *data, BIO *dcont, unsigned int flags)
763         {
764         BIO *cmsbio;
765         int ret = 0;
766         if (!(cmsbio = CMS_dataInit(cms, dcont)))
767                 {
768                 CMSerr(CMS_F_CMS_FINAL,ERR_R_MALLOC_FAILURE);
769                 return 0;
770                 }
771
772         SMIME_crlf_copy(data, cmsbio, flags);
773
774         (void)BIO_flush(cmsbio);
775
776
777         if (!CMS_dataFinal(cms, cmsbio))
778                 {
779                 CMSerr(CMS_F_CMS_FINAL,CMS_R_CMS_DATAFINAL_ERROR);
780                 goto err;
781                 }
782
783         ret = 1;
784
785         err:
786         do_free_upto(cmsbio, dcont);
787
788         return ret;
789
790         }
791
792 #ifdef ZLIB
793
794 int CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
795                                                         unsigned int flags)
796         {
797         BIO *cont;
798         int r;
799         if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_id_smime_ct_compressedData)
800                 {
801                 CMSerr(CMS_F_CMS_UNCOMPRESS,
802                                         CMS_R_TYPE_NOT_COMPRESSED_DATA);
803                 return 0;
804                 }
805
806         if (!dcont && !check_content(cms))
807                 return 0;
808
809         cont = CMS_dataInit(cms, dcont);
810         if (!cont)
811                 return 0;
812         r = cms_copy_content(out, cont, flags);
813         do_free_upto(cont, dcont);
814         return r;
815         }
816
817 CMS_ContentInfo *CMS_compress(BIO *in, int comp_nid, unsigned int flags)
818         {
819         CMS_ContentInfo *cms;
820         if (comp_nid <= 0)
821                 comp_nid = NID_zlib_compression;
822         cms = cms_CompressedData_create(comp_nid);
823         if (!cms)
824                 return NULL;
825
826         if(!(flags & CMS_DETACHED))
827                 CMS_set_detached(cms, 0);
828
829         if ((flags & CMS_STREAM) || CMS_final(cms, in, NULL, flags))
830                 return cms;
831
832         CMS_ContentInfo_free(cms);
833         return NULL;
834         }
835
836 #else
837
838 int CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
839                                                         unsigned int flags)
840         {
841         CMSerr(CMS_F_CMS_UNCOMPRESS, CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
842         return 0;
843         }
844
845 CMS_ContentInfo *CMS_compress(BIO *in, int comp_nid, unsigned int flags)
846         {
847         CMSerr(CMS_F_CMS_COMPRESS, CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
848         return NULL;
849         }
850
851 #endif