Import OpenSSL-1.0.1d.
[dragonfly.git] / crypto / openssl / crypto / cms / cms_lib.c
1 /* crypto/cms/cms_lib.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 <openssl/asn1t.h>
55 #include <openssl/x509.h>
56 #include <openssl/err.h>
57 #include <openssl/pem.h>
58 #include <openssl/bio.h>
59 #include <openssl/asn1.h>
60 #include "cms.h"
61 #include "cms_lcl.h"
62
63 IMPLEMENT_ASN1_FUNCTIONS(CMS_ContentInfo)
64 IMPLEMENT_ASN1_PRINT_FUNCTION(CMS_ContentInfo)
65
66 DECLARE_ASN1_ITEM(CMS_CertificateChoices)
67 DECLARE_ASN1_ITEM(CMS_RevocationInfoChoice)
68 DECLARE_STACK_OF(CMS_CertificateChoices)
69 DECLARE_STACK_OF(CMS_RevocationInfoChoice)
70
71 const ASN1_OBJECT *CMS_get0_type(CMS_ContentInfo *cms)
72         {
73         return cms->contentType;
74         }
75
76 CMS_ContentInfo *cms_Data_create(void)
77         {
78         CMS_ContentInfo *cms;
79         cms = CMS_ContentInfo_new();
80         if (cms)
81                 {
82                 cms->contentType = OBJ_nid2obj(NID_pkcs7_data);
83                 /* Never detached */
84                 CMS_set_detached(cms, 0);
85                 }
86         return cms;
87         }
88
89 BIO *cms_content_bio(CMS_ContentInfo *cms)
90         {
91         ASN1_OCTET_STRING **pos = CMS_get0_content(cms);
92         if (!pos)
93                 return NULL;
94         /* If content detached data goes nowhere: create NULL BIO */
95         if (!*pos)
96                 return BIO_new(BIO_s_null());
97         /* If content not detached and created return memory BIO
98          */
99         if (!*pos || ((*pos)->flags == ASN1_STRING_FLAG_CONT))
100                 return BIO_new(BIO_s_mem());
101         /* Else content was read in: return read only BIO for it */
102         return BIO_new_mem_buf((*pos)->data, (*pos)->length);
103         }
104
105 BIO *CMS_dataInit(CMS_ContentInfo *cms, BIO *icont)
106         {
107         BIO *cmsbio, *cont;
108         if (icont)
109                 cont = icont;
110         else
111                 cont = cms_content_bio(cms);
112         if (!cont)
113                 {
114                 CMSerr(CMS_F_CMS_DATAINIT, CMS_R_NO_CONTENT);
115                 return NULL;
116                 }
117         switch (OBJ_obj2nid(cms->contentType))
118                 {
119
120                 case NID_pkcs7_data:
121                 return cont;
122
123                 case NID_pkcs7_signed:
124                 cmsbio = cms_SignedData_init_bio(cms);
125                 break;
126
127                 case NID_pkcs7_digest:
128                 cmsbio = cms_DigestedData_init_bio(cms);
129                 break;
130 #ifdef ZLIB
131                 case NID_id_smime_ct_compressedData:
132                 cmsbio = cms_CompressedData_init_bio(cms);
133                 break;
134 #endif
135
136                 case NID_pkcs7_encrypted:
137                 cmsbio = cms_EncryptedData_init_bio(cms);
138                 break;
139
140                 case NID_pkcs7_enveloped:
141                 cmsbio = cms_EnvelopedData_init_bio(cms);
142                 break;
143
144                 default:
145                 CMSerr(CMS_F_CMS_DATAINIT, CMS_R_UNSUPPORTED_TYPE);
146                 return NULL;
147                 }
148
149         if (cmsbio)
150                 return BIO_push(cmsbio, cont);
151
152         if (!icont)
153                 BIO_free(cont);
154         return NULL;
155
156         }
157
158 int CMS_dataFinal(CMS_ContentInfo *cms, BIO *cmsbio)
159         {
160         ASN1_OCTET_STRING **pos = CMS_get0_content(cms);
161         if (!pos)
162                 return 0;
163         /* If ebmedded content find memory BIO and set content */
164         if (*pos && ((*pos)->flags & ASN1_STRING_FLAG_CONT))
165                 {
166                 BIO *mbio;
167                 unsigned char *cont;
168                 long contlen;
169                 mbio = BIO_find_type(cmsbio, BIO_TYPE_MEM);
170                 if (!mbio)
171                         {
172                         CMSerr(CMS_F_CMS_DATAFINAL, CMS_R_CONTENT_NOT_FOUND);
173                         return 0;
174                         }
175                 contlen = BIO_get_mem_data(mbio, &cont);
176                 /* Set bio as read only so its content can't be clobbered */
177                 BIO_set_flags(mbio, BIO_FLAGS_MEM_RDONLY);
178                 BIO_set_mem_eof_return(mbio, 0);
179                 ASN1_STRING_set0(*pos, cont, contlen);
180                 (*pos)->flags &= ~ASN1_STRING_FLAG_CONT;
181                 }
182
183         switch (OBJ_obj2nid(cms->contentType))
184                 {
185
186                 case NID_pkcs7_data:
187                 case NID_pkcs7_enveloped:
188                 case NID_pkcs7_encrypted:
189                 case NID_id_smime_ct_compressedData:
190                 /* Nothing to do */
191                 return 1;
192
193                 case NID_pkcs7_signed:
194                 return cms_SignedData_final(cms, cmsbio);
195
196                 case NID_pkcs7_digest:
197                 return cms_DigestedData_do_final(cms, cmsbio, 0);
198
199                 default:
200                 CMSerr(CMS_F_CMS_DATAFINAL, CMS_R_UNSUPPORTED_TYPE);
201                 return 0;
202                 }
203         }
204
205 /* Return an OCTET STRING pointer to content. This allows it to
206  * be accessed or set later.
207  */
208
209 ASN1_OCTET_STRING **CMS_get0_content(CMS_ContentInfo *cms)
210         {
211         switch (OBJ_obj2nid(cms->contentType))
212                 {
213
214                 case NID_pkcs7_data:
215                 return &cms->d.data;
216
217                 case NID_pkcs7_signed:
218                 return &cms->d.signedData->encapContentInfo->eContent;
219
220                 case NID_pkcs7_enveloped:
221                 return &cms->d.envelopedData->encryptedContentInfo->encryptedContent;
222
223                 case NID_pkcs7_digest:
224                 return &cms->d.digestedData->encapContentInfo->eContent;
225
226                 case NID_pkcs7_encrypted:
227                 return &cms->d.encryptedData->encryptedContentInfo->encryptedContent;
228
229                 case NID_id_smime_ct_authData:
230                 return &cms->d.authenticatedData->encapContentInfo->eContent;
231
232                 case NID_id_smime_ct_compressedData:
233                 return &cms->d.compressedData->encapContentInfo->eContent;
234
235                 default:
236                 if (cms->d.other->type == V_ASN1_OCTET_STRING)
237                         return &cms->d.other->value.octet_string;
238                 CMSerr(CMS_F_CMS_GET0_CONTENT, CMS_R_UNSUPPORTED_CONTENT_TYPE);
239                 return NULL;
240
241                 }
242         }
243
244 /* Return an ASN1_OBJECT pointer to content type. This allows it to
245  * be accessed or set later.
246  */
247
248 static ASN1_OBJECT **cms_get0_econtent_type(CMS_ContentInfo *cms)
249         {
250         switch (OBJ_obj2nid(cms->contentType))
251                 {
252
253                 case NID_pkcs7_signed:
254                 return &cms->d.signedData->encapContentInfo->eContentType;
255
256                 case NID_pkcs7_enveloped:
257                 return &cms->d.envelopedData->encryptedContentInfo->contentType;
258
259                 case NID_pkcs7_digest:
260                 return &cms->d.digestedData->encapContentInfo->eContentType;
261
262                 case NID_pkcs7_encrypted:
263                 return &cms->d.encryptedData->encryptedContentInfo->contentType;
264
265                 case NID_id_smime_ct_authData:
266                 return &cms->d.authenticatedData->encapContentInfo->eContentType;
267
268                 case NID_id_smime_ct_compressedData:
269                 return &cms->d.compressedData->encapContentInfo->eContentType;
270
271                 default:
272                 CMSerr(CMS_F_CMS_GET0_ECONTENT_TYPE,
273                                         CMS_R_UNSUPPORTED_CONTENT_TYPE);
274                 return NULL;
275
276                 }
277         }
278
279 const ASN1_OBJECT *CMS_get0_eContentType(CMS_ContentInfo *cms)
280         {
281         ASN1_OBJECT **petype;
282         petype = cms_get0_econtent_type(cms);
283         if (petype)
284                 return *petype;
285         return NULL;
286         }
287
288 int CMS_set1_eContentType(CMS_ContentInfo *cms, const ASN1_OBJECT *oid)
289         {
290         ASN1_OBJECT **petype, *etype;
291         petype = cms_get0_econtent_type(cms);
292         if (!petype)
293                 return 0;
294         if (!oid)
295                 return 1;
296         etype = OBJ_dup(oid);
297         if (!etype)
298                 return 0;
299         ASN1_OBJECT_free(*petype);
300         *petype = etype;
301         return 1;
302         }
303
304 int CMS_is_detached(CMS_ContentInfo *cms)
305         {
306         ASN1_OCTET_STRING **pos;
307         pos = CMS_get0_content(cms);
308         if (!pos)
309                 return -1;
310         if (*pos)
311                 return 0;
312         return 1;
313         }
314
315 int CMS_set_detached(CMS_ContentInfo *cms, int detached)
316         {
317         ASN1_OCTET_STRING **pos;
318         pos = CMS_get0_content(cms);
319         if (!pos)
320                 return 0;
321         if (detached)
322                 {
323                 if (*pos)
324                         {
325                         ASN1_OCTET_STRING_free(*pos);
326                         *pos = NULL;
327                         }
328                 return 1;
329                 }
330         if (!*pos)
331                 *pos = ASN1_OCTET_STRING_new();
332         if (*pos)
333                 {
334                 /* NB: special flag to show content is created and not
335                  * read in.
336                  */
337                 (*pos)->flags |= ASN1_STRING_FLAG_CONT;
338                 return 1;
339                 }
340         CMSerr(CMS_F_CMS_SET_DETACHED, ERR_R_MALLOC_FAILURE);
341         return 0;
342         }
343
344 /* Set up an X509_ALGOR DigestAlgorithmIdentifier from an EVP_MD */
345
346 void cms_DigestAlgorithm_set(X509_ALGOR *alg, const EVP_MD *md)
347         {
348         int param_type;
349
350         if (md->flags & EVP_MD_FLAG_DIGALGID_ABSENT)
351                 param_type = V_ASN1_UNDEF;
352         else
353                 param_type = V_ASN1_NULL;
354
355         X509_ALGOR_set0(alg, OBJ_nid2obj(EVP_MD_type(md)), param_type, NULL);
356
357         }
358
359 /* Create a digest BIO from an X509_ALGOR structure */
360
361 BIO *cms_DigestAlgorithm_init_bio(X509_ALGOR *digestAlgorithm)
362         {
363         BIO *mdbio = NULL;
364         ASN1_OBJECT *digestoid;
365         const EVP_MD *digest;
366         X509_ALGOR_get0(&digestoid, NULL, NULL, digestAlgorithm);
367         digest = EVP_get_digestbyobj(digestoid);
368         if (!digest)
369                 {
370                 CMSerr(CMS_F_CMS_DIGESTALGORITHM_INIT_BIO,
371                                 CMS_R_UNKNOWN_DIGEST_ALGORIHM);
372                 goto err;       
373                 }
374         mdbio = BIO_new(BIO_f_md());
375         if (!mdbio || !BIO_set_md(mdbio, digest))
376                 {
377                 CMSerr(CMS_F_CMS_DIGESTALGORITHM_INIT_BIO,
378                                 CMS_R_MD_BIO_INIT_ERROR);
379                 goto err;       
380                 }
381         return mdbio;
382         err:
383         if (mdbio)
384                 BIO_free(mdbio);
385         return NULL;
386         }
387
388 /* Locate a message digest content from a BIO chain based on SignerInfo */
389
390 int cms_DigestAlgorithm_find_ctx(EVP_MD_CTX *mctx, BIO *chain,
391                                         X509_ALGOR *mdalg)
392         {
393         int nid;
394         ASN1_OBJECT *mdoid;
395         X509_ALGOR_get0(&mdoid, NULL, NULL, mdalg);
396         nid = OBJ_obj2nid(mdoid);
397         /* Look for digest type to match signature */
398         for (;;)
399                 {
400                 EVP_MD_CTX *mtmp;
401                 chain = BIO_find_type(chain, BIO_TYPE_MD);
402                 if (chain == NULL)
403                         {
404                         CMSerr(CMS_F_CMS_DIGESTALGORITHM_FIND_CTX,
405                                                 CMS_R_NO_MATCHING_DIGEST);
406                         return 0;
407                         }
408                 BIO_get_md_ctx(chain, &mtmp);
409                 if (EVP_MD_CTX_type(mtmp) == nid
410                 /* Workaround for broken implementations that use signature
411                  * algorithm  OID instead of digest.
412                  */
413                         || EVP_MD_pkey_type(EVP_MD_CTX_md(mtmp)) == nid)
414                         return EVP_MD_CTX_copy_ex(mctx, mtmp);
415                 chain = BIO_next(chain);
416                 }
417         }
418
419 static STACK_OF(CMS_CertificateChoices) **cms_get0_certificate_choices(CMS_ContentInfo *cms)
420         {
421         switch (OBJ_obj2nid(cms->contentType))
422                 {
423
424                 case NID_pkcs7_signed:
425                 return &cms->d.signedData->certificates;
426
427                 case NID_pkcs7_enveloped:
428                 return &cms->d.envelopedData->originatorInfo->certificates;
429
430                 default:
431                 CMSerr(CMS_F_CMS_GET0_CERTIFICATE_CHOICES,
432                                         CMS_R_UNSUPPORTED_CONTENT_TYPE);
433                 return NULL;
434
435                 }
436         }
437
438 CMS_CertificateChoices *CMS_add0_CertificateChoices(CMS_ContentInfo *cms)
439         {
440         STACK_OF(CMS_CertificateChoices) **pcerts;
441         CMS_CertificateChoices *cch;
442         pcerts = cms_get0_certificate_choices(cms);
443         if (!pcerts)
444                 return NULL;
445         if (!*pcerts)
446                 *pcerts = sk_CMS_CertificateChoices_new_null();
447         if (!*pcerts)
448                 return NULL;
449         cch = M_ASN1_new_of(CMS_CertificateChoices);
450         if (!cch)
451                 return NULL;
452         if (!sk_CMS_CertificateChoices_push(*pcerts, cch))
453                 {
454                 M_ASN1_free_of(cch, CMS_CertificateChoices);
455                 return NULL;
456                 }
457         return cch;
458         }
459
460 int CMS_add0_cert(CMS_ContentInfo *cms, X509 *cert)
461         {
462         CMS_CertificateChoices *cch;
463         STACK_OF(CMS_CertificateChoices) **pcerts;
464         int i;
465         pcerts = cms_get0_certificate_choices(cms);
466         if (!pcerts)
467                 return 0;
468         if (!pcerts)
469                 return 0;
470         for (i = 0; i < sk_CMS_CertificateChoices_num(*pcerts); i++)
471                 {
472                 cch = sk_CMS_CertificateChoices_value(*pcerts, i);
473                 if (cch->type == CMS_CERTCHOICE_CERT)
474                         {
475                         if (!X509_cmp(cch->d.certificate, cert))
476                                 {
477                                 CMSerr(CMS_F_CMS_ADD0_CERT, 
478                                         CMS_R_CERTIFICATE_ALREADY_PRESENT);
479                                 return 0;
480                                 }
481                         }
482                 }
483         cch = CMS_add0_CertificateChoices(cms);
484         if (!cch)
485                 return 0;
486         cch->type = CMS_CERTCHOICE_CERT;
487         cch->d.certificate = cert;
488         return 1;
489         }
490
491 int CMS_add1_cert(CMS_ContentInfo *cms, X509 *cert)
492         {
493         int r;
494         r = CMS_add0_cert(cms, cert);
495         if (r > 0)
496                 CRYPTO_add(&cert->references, 1, CRYPTO_LOCK_X509);
497         return r;
498         }
499
500 static STACK_OF(CMS_RevocationInfoChoice) **cms_get0_revocation_choices(CMS_ContentInfo *cms)
501         {
502         switch (OBJ_obj2nid(cms->contentType))
503                 {
504
505                 case NID_pkcs7_signed:
506                 return &cms->d.signedData->crls;
507
508                 case NID_pkcs7_enveloped:
509                 return &cms->d.envelopedData->originatorInfo->crls;
510
511                 default:
512                 CMSerr(CMS_F_CMS_GET0_REVOCATION_CHOICES,
513                                         CMS_R_UNSUPPORTED_CONTENT_TYPE);
514                 return NULL;
515
516                 }
517         }
518
519 CMS_RevocationInfoChoice *CMS_add0_RevocationInfoChoice(CMS_ContentInfo *cms)
520         {
521         STACK_OF(CMS_RevocationInfoChoice) **pcrls;
522         CMS_RevocationInfoChoice *rch;
523         pcrls = cms_get0_revocation_choices(cms);
524         if (!pcrls)
525                 return NULL;
526         if (!*pcrls)
527                 *pcrls = sk_CMS_RevocationInfoChoice_new_null();
528         if (!*pcrls)
529                 return NULL;
530         rch = M_ASN1_new_of(CMS_RevocationInfoChoice);
531         if (!rch)
532                 return NULL;
533         if (!sk_CMS_RevocationInfoChoice_push(*pcrls, rch))
534                 {
535                 M_ASN1_free_of(rch, CMS_RevocationInfoChoice);
536                 return NULL;
537                 }
538         return rch;
539         }
540
541 int CMS_add0_crl(CMS_ContentInfo *cms, X509_CRL *crl)
542         {
543         CMS_RevocationInfoChoice *rch;
544         rch = CMS_add0_RevocationInfoChoice(cms);
545         if (!rch)
546                 return 0;
547         rch->type = CMS_REVCHOICE_CRL;
548         rch->d.crl = crl;
549         return 1;
550         }
551
552 int CMS_add1_crl(CMS_ContentInfo *cms, X509_CRL *crl)
553         {
554         int r;
555         r = CMS_add0_crl(cms, crl);
556         if (r > 0)
557                 CRYPTO_add(&crl->references, 1, CRYPTO_LOCK_X509_CRL);
558         return r;
559         }
560
561 STACK_OF(X509) *CMS_get1_certs(CMS_ContentInfo *cms)
562         {
563         STACK_OF(X509) *certs = NULL;
564         CMS_CertificateChoices *cch;
565         STACK_OF(CMS_CertificateChoices) **pcerts;
566         int i;
567         pcerts = cms_get0_certificate_choices(cms);
568         if (!pcerts)
569                 return NULL;
570         for (i = 0; i < sk_CMS_CertificateChoices_num(*pcerts); i++)
571                 {
572                 cch = sk_CMS_CertificateChoices_value(*pcerts, i);
573                 if (cch->type == 0)
574                         {
575                         if (!certs)
576                                 {
577                                 certs = sk_X509_new_null();
578                                 if (!certs)
579                                         return NULL;
580                                 }
581                         if (!sk_X509_push(certs, cch->d.certificate))
582                                 {
583                                 sk_X509_pop_free(certs, X509_free);
584                                 return NULL;
585                                 }
586                         CRYPTO_add(&cch->d.certificate->references,
587                                                 1, CRYPTO_LOCK_X509);
588                         }
589                 }
590         return certs;
591
592         }
593
594 STACK_OF(X509_CRL) *CMS_get1_crls(CMS_ContentInfo *cms)
595         {
596         STACK_OF(X509_CRL) *crls = NULL;
597         STACK_OF(CMS_RevocationInfoChoice) **pcrls;
598         CMS_RevocationInfoChoice *rch;
599         int i;
600         pcrls = cms_get0_revocation_choices(cms);
601         if (!pcrls)
602                 return NULL;
603         for (i = 0; i < sk_CMS_RevocationInfoChoice_num(*pcrls); i++)
604                 {
605                 rch = sk_CMS_RevocationInfoChoice_value(*pcrls, i);
606                 if (rch->type == 0)
607                         {
608                         if (!crls)
609                                 {
610                                 crls = sk_X509_CRL_new_null();
611                                 if (!crls)
612                                         return NULL;
613                                 }
614                         if (!sk_X509_CRL_push(crls, rch->d.crl))
615                                 {
616                                 sk_X509_CRL_pop_free(crls, X509_CRL_free);
617                                 return NULL;
618                                 }
619                         CRYPTO_add(&rch->d.crl->references,
620                                                 1, CRYPTO_LOCK_X509_CRL);
621                         }
622                 }
623         return crls;
624         }