Return error if no cipher set for encrypted data type.
[openssl.git] / 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(flags & CMS_TEXT)
69                 {
70                 tmpout = BIO_new(BIO_s_mem());
71                 if(!tmpout)
72                         {
73                         CMSerr(CMS_F_CMS_COPY_CONTENT,ERR_R_MALLOC_FAILURE);
74                         goto err;
75                         }
76                 }
77         else
78                 tmpout = out;
79
80         /* Read all content through chain to determine content digests */
81         for (;;)
82         {
83                 i=BIO_read(in,buf,sizeof(buf));
84                 if (i <= 0)
85                         break;
86                 if (tmpout)
87                         BIO_write(tmpout, buf, i);
88         }
89
90         if(flags & CMS_TEXT)
91                 {
92                 if(!SMIME_text(tmpout, out))
93                         {
94                         CMSerr(CMS_F_CMS_COPY_CONTENT,CMS_R_SMIME_TEXT_ERROR);
95                         goto err;
96                         }
97                 }
98
99         r = 1;
100
101         err:
102         if (tmpout && (tmpout != out))
103                 BIO_free(tmpout);
104         return r;
105
106         }
107
108 int CMS_data(CMS_ContentInfo *cms, BIO *out, unsigned int flags)
109         {
110         BIO *cont;
111         int r;
112         if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_data)
113                 {
114                 CMSerr(CMS_F_CMS_DATA, CMS_R_TYPE_NOT_DATA);
115                 return 0;
116                 }
117         cont = CMS_dataInit(cms, NULL);
118         if (!cont)
119                 return 0;
120         r = cms_copy_content(out, cont, flags);
121         BIO_free_all(cont);
122         return r;
123         }
124
125 CMS_ContentInfo *CMS_data_create(BIO *in, unsigned int flags)
126         {
127         CMS_ContentInfo *cms;
128         cms = cms_Data_create();
129         if (!cms)
130                 return NULL;
131
132         if ((flags & CMS_STREAM) || CMS_final(cms, in, flags))
133                 return cms;
134
135         CMS_ContentInfo_free(cms);
136
137         return NULL;
138         }
139
140 int CMS_digest_verify(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
141                                                         unsigned int flags)
142         {
143         BIO *cont;
144         int r;
145         if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_digest)
146                 {
147                 CMSerr(CMS_F_CMS_DIGEST_VERIFY, CMS_R_TYPE_NOT_DIGESTED_DATA);
148                 return 0;
149                 }
150
151         if (!dcont)
152                 {
153                 ASN1_OCTET_STRING **pos = CMS_get0_content(cms);
154                 if (!pos || !*pos)
155                         {
156                         CMSerr(CMS_F_CMS_DIGEST_VERIFY, CMS_R_NO_CONTENT);
157                         return 0;
158                         }
159                 }
160
161         cont = CMS_dataInit(cms, dcont);
162         if (!cont)
163                 return 0;
164         r = cms_copy_content(out, cont, flags);
165         if (r)
166                 r = cms_DigestedData_do_final(cms, cont, 1);
167         BIO_free_all(cont);
168         return r;
169         }
170
171 CMS_ContentInfo *CMS_digest_create(BIO *in, const EVP_MD *md,
172                                         unsigned int flags)
173         {
174         CMS_ContentInfo *cms;
175         if (!md)
176                 md = EVP_sha1();
177         cms = cms_DigestedData_create(md);
178         if (!cms)
179                 return NULL;
180
181         if(!(flags & CMS_DETACHED))
182                 CMS_set_detached(cms, 0);
183
184         if ((flags & CMS_STREAM) || CMS_final(cms, in, flags))
185                 return cms;
186
187         CMS_ContentInfo_free(cms);
188         return NULL;
189         }
190
191 int CMS_EncryptedData_decrypt(CMS_ContentInfo *cms,
192                                 const unsigned char *key, size_t keylen,
193                                 BIO *dcont, BIO *out, unsigned int flags)
194         {
195         BIO *cont;
196         int r;
197         if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_pkcs7_encrypted)
198                 {
199                 CMSerr(CMS_F_CMS_ENCRYPTEDDATA_DECRYPT,
200                                         CMS_R_TYPE_NOT_ENCRYPTED_DATA);
201                 return 0;
202                 }
203
204         if (!dcont)
205                 {
206                 ASN1_OCTET_STRING **pos = CMS_get0_content(cms);
207                 if (!pos || !*pos)
208                         {
209                         CMSerr(CMS_F_CMS_ENCRYPTEDDATA_DECRYPT,
210                                         CMS_R_NO_CONTENT);
211                         return 0;
212                         }
213                 }
214
215         if (CMS_EncryptedData_set1_key(cms, NULL, key, keylen) <= 0)
216                 return 0;
217         cont = CMS_dataInit(cms, dcont);
218         if (!cont)
219                 return 0;
220         r = cms_copy_content(out, cont, flags);
221         BIO_free_all(cont);
222         return r;
223         }
224
225 CMS_ContentInfo *CMS_EncryptedData_encrypt(BIO *in, const EVP_CIPHER *cipher,
226                                         const unsigned char *key, size_t keylen,
227                                         unsigned int flags)
228         {
229         CMS_ContentInfo *cms;
230         if (!cipher)
231                 {
232                 CMSerr(CMS_F_CMS_ENCRYPTEDDATA_ENCRYPT, CMS_R_NO_CIPHER);
233                 return NULL;
234                 }
235         cms = CMS_ContentInfo_new();
236         if (!cms)
237                 return NULL;
238         if (!CMS_EncryptedData_set1_key(cms, cipher, key, keylen))
239                 return NULL;
240
241         if(!(flags & CMS_DETACHED))
242                 CMS_set_detached(cms, 0);
243
244         if ((flags & (CMS_STREAM|CMS_PARTIAL)) || CMS_final(cms, in, flags))
245                 return cms;
246
247         CMS_ContentInfo_free(cms);
248         return NULL;
249         }
250
251 static int cms_signerinfo_verify_cert(CMS_SignerInfo *si,
252                                         X509_STORE *store,
253                                         STACK_OF(X509) *certs,
254                                         STACK_OF(X509_CRL) *crls,
255                                         unsigned int flags)
256         {
257         X509_STORE_CTX ctx;
258         X509 *signer;
259         int i, j, r = 0;
260         CMS_SignerInfo_get0_algs(si, NULL, &signer, NULL, NULL);
261         if (!X509_STORE_CTX_init(&ctx, store, signer, certs))
262                 {
263                 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CERT,
264                                                 CMS_R_STORE_INIT_ERROR);
265                 goto err;
266                 }
267         X509_STORE_CTX_set_purpose(&ctx, X509_PURPOSE_SMIME_SIGN);
268         if (crls)
269                 X509_STORE_CTX_set0_crls(&ctx, crls);
270
271         i = X509_verify_cert(&ctx);
272         if (i <= 0)
273                 {
274                 j = X509_STORE_CTX_get_error(&ctx);
275                 CMSerr(CMS_F_CMS_SIGNERINFO_VERIFY_CERT,
276                                                 CMS_R_CERTIFICATE_VERIFY_ERROR);
277                 ERR_add_error_data(2, "Verify error:",
278                                          X509_verify_cert_error_string(j));
279                 goto err;
280                 }
281         r = 1;
282         err:
283         X509_STORE_CTX_cleanup(&ctx);
284         return r;
285
286         }
287
288 int CMS_verify(CMS_ContentInfo *cms, STACK_OF(X509) *certs,
289                  X509_STORE *store, BIO *dcont, BIO *out, unsigned int flags)
290         {
291         CMS_SignerInfo *si;
292         STACK_OF(CMS_SignerInfo) *sinfos;
293         STACK_OF(X509) *cms_certs = NULL;
294         STACK_OF(X509_CRL) *crls = NULL;
295         X509 *signer;
296         int i, scount = 0, ret = 0;
297         BIO *cmsbio = NULL, *tmpin = NULL;
298
299         if (!dcont)
300                 {
301                 ASN1_OCTET_STRING **pos = CMS_get0_content(cms);
302                 if (!pos || !*pos)
303                         {
304                         CMSerr(CMS_F_CMS_VERIFY, CMS_R_NO_CONTENT);
305                         return 0;
306                         }
307                 }
308
309         /* Attempt to find all signer certificates */
310
311         sinfos = CMS_get0_SignerInfos(cms);
312
313         if (sk_CMS_SignerInfo_num(sinfos) <= 0)
314                 {
315                 CMSerr(CMS_F_CMS_VERIFY, CMS_R_NO_SIGNERS);
316                 goto err;
317                 }
318
319         for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
320                 {
321                 si = sk_CMS_SignerInfo_value(sinfos, i);
322                 CMS_SignerInfo_get0_algs(si, NULL, &signer, NULL, NULL);
323                 if (signer)
324                         scount++;
325                 }
326
327         if (scount != sk_CMS_SignerInfo_num(sinfos))
328                 scount += CMS_set1_signers_certs(cms, certs, flags);
329
330         if (scount != sk_CMS_SignerInfo_num(sinfos))
331                 {
332                 CMSerr(CMS_F_CMS_VERIFY, CMS_R_SIGNER_CERTIFICATE_NOT_FOUND);
333                 goto err;
334                 }
335
336         /* Attempt to verify all signers certs */
337
338         if (!(flags & CMS_NO_SIGNER_CERT_VERIFY))
339                 {
340                 cms_certs = CMS_get1_certs(cms);
341                 crls = CMS_get1_crls(cms);
342                 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
343                         {
344                         si = sk_CMS_SignerInfo_value(sinfos, i);
345                         if (!cms_signerinfo_verify_cert(si, store,
346                                                         cms_certs, crls, flags))
347                                 goto err;
348                         }
349                 }
350
351         /* Attempt to verify all SignerInfo signed attribute signatures */
352
353         if (!(flags & CMS_NO_ATTR_VERIFY))
354                 {
355                 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
356                         {
357                         si = sk_CMS_SignerInfo_value(sinfos, i);
358                         if (CMS_signed_get_attr_count(si) < 0)
359                                 continue;
360                         if (CMS_SignerInfo_verify(si) <= 0)
361                                 goto err;
362                         }
363                 }
364
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
369          * are calculated.
370          */
371
372         if (dcont && (BIO_method_type(dcont) == BIO_TYPE_MEM))
373                 {
374                 char *ptr;
375                 long len;
376                 len = BIO_get_mem_data(dcont, &ptr);
377                 tmpin = BIO_new_mem_buf(ptr, len);
378                 if (tmpin == NULL)
379                         {
380                         CMSerr(CMS_F_CMS_VERIFY,ERR_R_MALLOC_FAILURE);
381                         return 0;
382                         }
383                 }
384         else
385                 tmpin = dcont;
386                 
387
388         cmsbio=CMS_dataInit(cms, tmpin);
389         if (!cmsbio)
390                 goto err;
391
392         if (!cms_copy_content(out, cmsbio, flags))
393                 goto err;
394
395         if (!(flags & CMS_NO_CONTENT_VERIFY))
396                 {
397                 for (i = 0; i < sk_CMS_SignerInfo_num(sinfos); i++)
398                         {
399                         si = sk_CMS_SignerInfo_value(sinfos, i);
400                         if (!CMS_SignerInfo_verify_content(si, cmsbio))
401                                 {
402                                 CMSerr(CMS_F_CMS_VERIFY,
403                                         CMS_R_CONTENT_VERIFY_ERROR);
404                                 goto err;
405                                 }
406                         }
407                 }
408
409         ret = 1;
410
411         err:
412         
413         if (dcont && (tmpin == dcont))
414                 BIO_pop(cmsbio);
415         BIO_free_all(cmsbio);
416
417         if (cms_certs)
418                 sk_X509_pop_free(cms_certs, X509_free);
419         if (crls)
420                 sk_X509_CRL_pop_free(crls, X509_CRL_free);
421
422         return ret;
423         }
424
425 CMS_ContentInfo *CMS_sign(X509 *signcert, EVP_PKEY *pkey, STACK_OF(X509) *certs,
426                                                 BIO *data, unsigned int flags)
427         {
428         CMS_ContentInfo *cms;
429         int i;
430         cms = CMS_ContentInfo_new();
431         if (!cms)
432                 goto merr;
433         if (pkey && !CMS_add1_signer(cms, signcert, pkey, NULL, flags))
434                 {
435                 CMSerr(CMS_F_CMS_SIGN, CMS_R_ADD_SIGNER_ERROR);
436                 goto err;
437                 }
438         for (i = 0; i < sk_X509_num(certs); i++)
439                 {
440                 X509 *x = sk_X509_value(certs, i);
441                 if (!CMS_add1_cert(cms, x))
442                         goto merr;
443                 }
444         /* If no signer or certs initialize signedData */
445         if (!pkey && !i && !CMS_SignedData_init(cms))
446                 goto merr;
447
448         if(!(flags & CMS_DETACHED))
449                 CMS_set_detached(cms, 0);
450
451         if ((flags & (CMS_STREAM|CMS_PARTIAL)) || CMS_final(cms, data, flags))
452                 return cms;
453
454         return cms;
455
456         merr:
457         CMSerr(CMS_F_CMS_SIGN, ERR_R_MALLOC_FAILURE);
458
459         err:
460         if (cms)
461                 CMS_ContentInfo_free(cms);
462         return NULL;
463         }
464
465 /* Placeholders for now... */
466
467 CMS_ContentInfo *CMS_encrypt(STACK_OF(X509) *certs, BIO *in,
468                                 const EVP_CIPHER *cipher, unsigned int flags)
469         {
470         return NULL;
471         }
472         
473 int CMS_decrypt(CMS_ContentInfo *cms, EVP_PKEY *pkey, X509 *cert, BIO *data,
474                                 unsigned int flags)
475         {
476         return 0;
477         }
478
479 int CMS_final(CMS_ContentInfo *cms, BIO *data, int flags)
480         {
481         BIO *cmsbio;
482         int ret = 0;
483         if (!(cmsbio = CMS_dataInit(cms, NULL)))
484                 {
485                 CMSerr(CMS_F_CMS_FINAL,ERR_R_MALLOC_FAILURE);
486                 return 0;
487                 }
488
489         SMIME_crlf_copy(data, cmsbio, flags);
490
491         (void)BIO_flush(cmsbio);
492
493
494         if (!CMS_dataFinal(cms, cmsbio))
495                 {
496                 CMSerr(CMS_F_CMS_FINAL,CMS_R_CMS_DATAFINAL_ERROR);
497                 goto err;
498                 }
499
500         ret = 1;
501
502         err:
503         BIO_free_all(cmsbio);
504
505         return ret;
506
507         }
508
509 #ifdef ZLIB
510
511 int CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
512                                                         unsigned int flags)
513         {
514         BIO *cont;
515         int r;
516         if (OBJ_obj2nid(CMS_get0_type(cms)) != NID_id_smime_ct_compressedData)
517                 {
518                 CMSerr(CMS_F_CMS_UNCOMPRESS,
519                                         CMS_R_TYPE_NOT_COMPRESSED_DATA);
520                 return 0;
521                 }
522
523         if (!dcont)
524                 {
525                 ASN1_OCTET_STRING **pos = CMS_get0_content(cms);
526                 if (!pos || !*pos)
527                         {
528                         CMSerr(CMS_F_CMS_UNCOMPRESS, CMS_R_NO_CONTENT);
529                         return 0;
530                         }
531                 }
532
533         cont = CMS_dataInit(cms, dcont);
534         if (!cont)
535                 return 0;
536         r = cms_copy_content(out, cont, flags);
537         BIO_free_all(cont);
538         return r;
539         }
540
541 CMS_ContentInfo *CMS_compress(BIO *in, int comp_nid, unsigned int flags)
542         {
543         CMS_ContentInfo *cms;
544         if (comp_nid <= 0)
545                 comp_nid = NID_zlib_compression;
546         cms = cms_CompressedData_create(comp_nid);
547         if (!cms)
548                 return NULL;
549
550         if(!(flags & CMS_DETACHED))
551                 CMS_set_detached(cms, 0);
552
553         if ((flags & CMS_STREAM) || CMS_final(cms, in, flags))
554                 return cms;
555
556         CMS_ContentInfo_free(cms);
557         return NULL;
558         }
559
560 #else
561
562 int CMS_uncompress(CMS_ContentInfo *cms, BIO *dcont, BIO *out,
563                                                         unsigned int flags)
564         {
565         CMSerr(CMS_F_CMS_UNCOMPRESS, CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
566         return 0;
567         }
568
569 CMS_ContentInfo *CMS_compress(BIO *in, int comp_nid, unsigned int flags)
570         {
571         CMSerr(CMS_F_CMS_COMPRESS, CMS_R_UNSUPPORTED_COMPRESSION_ALGORITHM);
572         return NULL;
573         }
574
575 #endif