388a1d78b3f5bf34e3ceb8deeac58d74c4235716
[openssl.git] / crypto / pkcs7 / pk7_lib.c
1 /* crypto/pkcs7/pk7_lib.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3  * All rights reserved.
4  *
5  * This package is an SSL implementation written
6  * by Eric Young (eay@cryptsoft.com).
7  * The implementation was written so as to conform with Netscapes SSL.
8  * 
9  * This library is free for commercial and non-commercial use as long as
10  * the following conditions are aheared to.  The following conditions
11  * apply to all code found in this distribution, be it the RC4, RSA,
12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
13  * included with this distribution is covered by the same copyright terms
14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15  * 
16  * Copyright remains Eric Young's, and as such any Copyright notices in
17  * the code are not to be removed.
18  * If this package is used in a product, Eric Young should be given attribution
19  * as the author of the parts of the library used.
20  * This can be in the form of a textual message at program startup or
21  * in documentation (online or textual) provided with the package.
22  * 
23  * Redistribution and use in source and binary forms, with or without
24  * modification, are permitted provided that the following conditions
25  * are met:
26  * 1. Redistributions of source code must retain the copyright
27  *    notice, this list of conditions and the following disclaimer.
28  * 2. Redistributions in binary form must reproduce the above copyright
29  *    notice, this list of conditions and the following disclaimer in the
30  *    documentation and/or other materials provided with the distribution.
31  * 3. All advertising materials mentioning features or use of this software
32  *    must display the following acknowledgement:
33  *    "This product includes cryptographic software written by
34  *     Eric Young (eay@cryptsoft.com)"
35  *    The word 'cryptographic' can be left out if the rouines from the library
36  *    being used are not cryptographic related :-).
37  * 4. If you include any Windows specific code (or a derivative thereof) from 
38  *    the apps directory (application code) you must include an acknowledgement:
39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40  * 
41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51  * SUCH DAMAGE.
52  * 
53  * The licence and distribution terms for any publically available version or
54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
55  * copied and put under another distribution licence
56  * [including the GNU Public Licence.]
57  */
58
59 #include <stdio.h>
60 #include "cryptlib.h"
61 #include <openssl/objects.h>
62 #include <openssl/x509.h>
63
64 long PKCS7_ctrl(PKCS7 *p7, int cmd, long larg, char *parg)
65         {
66         int nid;
67         long ret;
68
69         nid=OBJ_obj2nid(p7->type);
70
71         switch (cmd)
72                 {
73         case PKCS7_OP_SET_DETACHED_SIGNATURE:
74                 if (nid == NID_pkcs7_signed)
75                         {
76                         ret=p7->detached=(int)larg;
77                         }
78                 else
79                         {
80                         PKCS7err(PKCS7_F_PKCS7_CTRL,PKCS7_R_OPERATION_NOT_SUPPORTED_ON_THIS_TYPE);
81                         ret=0;
82                         }
83                 break;
84         case PKCS7_OP_GET_DETACHED_SIGNATURE:
85                 if (nid == NID_pkcs7_signed)
86                         {
87                         ret=p7->detached;
88                         }
89                 else
90                         {
91                         PKCS7err(PKCS7_F_PKCS7_CTRL,PKCS7_R_OPERATION_NOT_SUPPORTED_ON_THIS_TYPE);
92                         ret=0;
93                         }
94                         
95                 break;
96         default:
97                 PKCS7err(PKCS7_F_PKCS7_CTRL,PKCS7_R_UNKNOWN_OPERATION);
98                 ret=0;
99                 }
100         return(ret);
101         }
102
103 int PKCS7_content_new(PKCS7 *p7, int type)
104         {
105         PKCS7 *ret=NULL;
106
107         if ((ret=PKCS7_new()) == NULL) goto err;
108         if (!PKCS7_set_type(ret,type)) goto err;
109         if (!PKCS7_set_content(p7,ret)) goto err;
110
111         return(1);
112 err:
113         if (ret != NULL) PKCS7_free(ret);
114         return(0);
115         }
116
117 int PKCS7_set_content(PKCS7 *p7, PKCS7 *p7_data)
118         {
119         int i;
120
121         i=OBJ_obj2nid(p7->type);
122         switch (i)
123                 {
124         case NID_pkcs7_signed:
125                 if (p7->d.sign->contents != NULL)
126                         PKCS7_free(p7->d.sign->contents);
127                 p7->d.sign->contents=p7_data;
128                 break;
129         case NID_pkcs7_digest:
130         case NID_pkcs7_data:
131         case NID_pkcs7_enveloped:
132         case NID_pkcs7_signedAndEnveloped:
133         case NID_pkcs7_encrypted:
134         default:
135                 PKCS7err(PKCS7_F_PKCS7_SET_CONTENT,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
136                 goto err;
137                 }
138         return(1);
139 err:
140         return(0);
141         }
142
143 int PKCS7_set_type(PKCS7 *p7, int type)
144         {
145         ASN1_OBJECT *obj;
146
147         PKCS7_content_free(p7);
148         obj=OBJ_nid2obj(type); /* will not fail */
149
150         switch (type)
151                 {
152         case NID_pkcs7_signed:
153                 p7->type=obj;
154                 if ((p7->d.sign=PKCS7_SIGNED_new()) == NULL)
155                         goto err;
156                 ASN1_INTEGER_set(p7->d.sign->version,1);
157                 break;
158         case NID_pkcs7_data:
159                 p7->type=obj;
160                 if ((p7->d.data=M_ASN1_OCTET_STRING_new()) == NULL)
161                         goto err;
162                 break;
163         case NID_pkcs7_signedAndEnveloped:
164                 p7->type=obj;
165                 if ((p7->d.signed_and_enveloped=PKCS7_SIGN_ENVELOPE_new())
166                         == NULL) goto err;
167                 ASN1_INTEGER_set(p7->d.signed_and_enveloped->version,1);
168                 break;
169         case NID_pkcs7_enveloped:
170                 p7->type=obj;
171                 if ((p7->d.enveloped=PKCS7_ENVELOPE_new())
172                         == NULL) goto err;
173                 ASN1_INTEGER_set(p7->d.enveloped->version,0);
174                 break;
175         case NID_pkcs7_encrypted:
176                 p7->type=obj;
177                 if ((p7->d.encrypted=PKCS7_ENCRYPT_new())
178                         == NULL) goto err;
179                 ASN1_INTEGER_set(p7->d.encrypted->version,0);
180                 break;
181
182         case NID_pkcs7_digest:
183         default:
184                 PKCS7err(PKCS7_F_PKCS7_SET_TYPE,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
185                 goto err;
186                 }
187         return(1);
188 err:
189         return(0);
190         }
191
192 int PKCS7_add_signer(PKCS7 *p7, PKCS7_SIGNER_INFO *psi)
193         {
194         int i,j,nid;
195         X509_ALGOR *alg;
196         STACK_OF(PKCS7_SIGNER_INFO) *signer_sk;
197         STACK_OF(X509_ALGOR) *md_sk;
198
199         i=OBJ_obj2nid(p7->type);
200         switch (i)
201                 {
202         case NID_pkcs7_signed:
203                 signer_sk=      p7->d.sign->signer_info;
204                 md_sk=          p7->d.sign->md_algs;
205                 break;
206         case NID_pkcs7_signedAndEnveloped:
207                 signer_sk=      p7->d.signed_and_enveloped->signer_info;
208                 md_sk=          p7->d.signed_and_enveloped->md_algs;
209                 break;
210         default:
211                 PKCS7err(PKCS7_F_PKCS7_ADD_SIGNER,PKCS7_R_WRONG_CONTENT_TYPE);
212                 return(0);
213                 }
214
215         nid=OBJ_obj2nid(psi->digest_alg->algorithm);
216
217         /* If the digest is not currently listed, add it */
218         j=0;
219         for (i=0; i<sk_X509_ALGOR_num(md_sk); i++)
220                 {
221                 alg=sk_X509_ALGOR_value(md_sk,i);
222                 if (OBJ_obj2nid(alg->algorithm) == nid)
223                         {
224                         j=1;
225                         break;
226                         }
227                 }
228         if (!j) /* we need to add another algorithm */
229                 {
230                 alg=X509_ALGOR_new();
231                 alg->algorithm=OBJ_nid2obj(nid);
232                 sk_X509_ALGOR_push(md_sk,alg);
233                 }
234
235         sk_PKCS7_SIGNER_INFO_push(signer_sk,psi);
236         return(1);
237         }
238
239 int PKCS7_add_certificate(PKCS7 *p7, X509 *x509)
240         {
241         int i;
242         STACK_OF(X509) **sk;
243
244         i=OBJ_obj2nid(p7->type);
245         switch (i)
246                 {
247         case NID_pkcs7_signed:
248                 sk= &(p7->d.sign->cert);
249                 break;
250         case NID_pkcs7_signedAndEnveloped:
251                 sk= &(p7->d.signed_and_enveloped->cert);
252                 break;
253         default:
254                 PKCS7err(PKCS7_F_PKCS7_ADD_CERTIFICATE,PKCS7_R_WRONG_CONTENT_TYPE);
255                 return(0);
256                 }
257
258         if (*sk == NULL)
259                 *sk=sk_X509_new_null();
260         CRYPTO_add(&x509->references,1,CRYPTO_LOCK_X509);
261         sk_X509_push(*sk,x509);
262         return(1);
263         }
264
265 int PKCS7_add_crl(PKCS7 *p7, X509_CRL *crl)
266         {
267         int i;
268         STACK_OF(X509_CRL) **sk;
269
270         i=OBJ_obj2nid(p7->type);
271         switch (i)
272                 {
273         case NID_pkcs7_signed:
274                 sk= &(p7->d.sign->crl);
275                 break;
276         case NID_pkcs7_signedAndEnveloped:
277                 sk= &(p7->d.signed_and_enveloped->crl);
278                 break;
279         default:
280                 PKCS7err(PKCS7_F_PKCS7_ADD_CRL,PKCS7_R_WRONG_CONTENT_TYPE);
281                 return(0);
282                 }
283
284         if (*sk == NULL)
285                 *sk=sk_X509_CRL_new_null();
286
287         CRYPTO_add(&crl->references,1,CRYPTO_LOCK_X509_CRL);
288         sk_X509_CRL_push(*sk,crl);
289         return(1);
290         }
291
292 int PKCS7_SIGNER_INFO_set(PKCS7_SIGNER_INFO *p7i, X509 *x509, EVP_PKEY *pkey,
293              EVP_MD *dgst)
294         {
295         /* We now need to add another PKCS7_SIGNER_INFO entry */
296         ASN1_INTEGER_set(p7i->version,1);
297         X509_NAME_set(&p7i->issuer_and_serial->issuer,
298                 X509_get_issuer_name(x509));
299
300         /* because ASN1_INTEGER_set is used to set a 'long' we will do
301          * things the ugly way. */
302         M_ASN1_INTEGER_free(p7i->issuer_and_serial->serial);
303         p7i->issuer_and_serial->serial=
304                 M_ASN1_INTEGER_dup(X509_get_serialNumber(x509));
305
306         /* lets keep the pkey around for a while */
307         CRYPTO_add(&pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
308         p7i->pkey=pkey;
309
310         /* Set the algorithms */
311         if (pkey->type == EVP_PKEY_DSA)
312                 p7i->digest_alg->algorithm=OBJ_nid2obj(NID_sha1);
313         else    
314                 p7i->digest_alg->algorithm=OBJ_nid2obj(EVP_MD_type(dgst));
315
316         if (p7i->digest_alg->parameter != NULL)
317                 ASN1_TYPE_free(p7i->digest_alg->parameter);
318         if ((p7i->digest_alg->parameter=ASN1_TYPE_new()) == NULL)
319                 goto err;
320         p7i->digest_alg->parameter->type=V_ASN1_NULL;
321
322         p7i->digest_enc_alg->algorithm=OBJ_nid2obj(EVP_PKEY_type(pkey->type));
323
324         if (p7i->digest_enc_alg->parameter != NULL)
325                 ASN1_TYPE_free(p7i->digest_enc_alg->parameter);
326         if ((p7i->digest_enc_alg->parameter=ASN1_TYPE_new()) == NULL)
327                 goto err;
328         p7i->digest_enc_alg->parameter->type=V_ASN1_NULL;
329
330         return(1);
331 err:
332         return(0);
333         }
334
335 PKCS7_SIGNER_INFO *PKCS7_add_signature(PKCS7 *p7, X509 *x509, EVP_PKEY *pkey,
336              EVP_MD *dgst)
337         {
338         PKCS7_SIGNER_INFO *si;
339
340         if ((si=PKCS7_SIGNER_INFO_new()) == NULL) goto err;
341         if (!PKCS7_SIGNER_INFO_set(si,x509,pkey,dgst)) goto err;
342         if (!PKCS7_add_signer(p7,si)) goto err;
343         return(si);
344 err:
345         return(NULL);
346         }
347
348 STACK_OF(PKCS7_SIGNER_INFO) *PKCS7_get_signer_info(PKCS7 *p7)
349         {
350         if (PKCS7_type_is_signed(p7))
351                 {
352                 return(p7->d.sign->signer_info);
353                 }
354         else if (PKCS7_type_is_signedAndEnveloped(p7))
355                 {
356                 return(p7->d.signed_and_enveloped->signer_info);
357                 }
358         else
359                 return(NULL);
360         }
361
362 PKCS7_RECIP_INFO *PKCS7_add_recipient(PKCS7 *p7, X509 *x509)
363         {
364         PKCS7_RECIP_INFO *ri;
365
366         if ((ri=PKCS7_RECIP_INFO_new()) == NULL) goto err;
367         if (!PKCS7_RECIP_INFO_set(ri,x509)) goto err;
368         if (!PKCS7_add_recipient_info(p7,ri)) goto err;
369         return(ri);
370 err:
371         return(NULL);
372         }
373
374 int PKCS7_add_recipient_info(PKCS7 *p7, PKCS7_RECIP_INFO *ri)
375         {
376         int i;
377         STACK_OF(PKCS7_RECIP_INFO) *sk;
378
379         i=OBJ_obj2nid(p7->type);
380         switch (i)
381                 {
382         case NID_pkcs7_signedAndEnveloped:
383                 sk=     p7->d.signed_and_enveloped->recipientinfo;
384                 break;
385         case NID_pkcs7_enveloped:
386                 sk=     p7->d.enveloped->recipientinfo;
387                 break;
388         default:
389                 PKCS7err(PKCS7_F_PKCS7_ADD_RECIPIENT_INFO,PKCS7_R_WRONG_CONTENT_TYPE);
390                 return(0);
391                 }
392
393         sk_PKCS7_RECIP_INFO_push(sk,ri);
394         return(1);
395         }
396
397 int PKCS7_RECIP_INFO_set(PKCS7_RECIP_INFO *p7i, X509 *x509)
398         {
399         ASN1_INTEGER_set(p7i->version,0);
400         X509_NAME_set(&p7i->issuer_and_serial->issuer,
401                 X509_get_issuer_name(x509));
402
403         M_ASN1_INTEGER_free(p7i->issuer_and_serial->serial);
404         p7i->issuer_and_serial->serial=
405                 M_ASN1_INTEGER_dup(X509_get_serialNumber(x509));
406
407         X509_ALGOR_free(p7i->key_enc_algor);
408         p7i->key_enc_algor=(X509_ALGOR *)ASN1_dup(i2d_X509_ALGOR,
409                 (char *(*)())d2i_X509_ALGOR,
410                 (char *)x509->cert_info->key->algor);
411
412         CRYPTO_add(&x509->references,1,CRYPTO_LOCK_X509);
413         p7i->cert=x509;
414
415         return(1);
416         }
417
418 X509 *PKCS7_cert_from_signer_info(PKCS7 *p7, PKCS7_SIGNER_INFO *si)
419         {
420         if (PKCS7_type_is_signed(p7))
421                 return(X509_find_by_issuer_and_serial(p7->d.sign->cert,
422                         si->issuer_and_serial->issuer,
423                         si->issuer_and_serial->serial));
424         else
425                 return(NULL);
426         }
427
428 int PKCS7_set_cipher(PKCS7 *p7, const EVP_CIPHER *cipher)
429         {
430         int i;
431         PKCS7_ENC_CONTENT *ec;
432
433         i=OBJ_obj2nid(p7->type);
434         switch (i)
435                 {
436         case NID_pkcs7_signedAndEnveloped:
437                 ec=p7->d.signed_and_enveloped->enc_data;
438                 break;
439         case NID_pkcs7_enveloped:
440                 ec=p7->d.enveloped->enc_data;
441                 break;
442         default:
443                 PKCS7err(PKCS7_F_PKCS7_SET_CIPHER,PKCS7_R_WRONG_CONTENT_TYPE);
444                 return(0);
445                 }
446
447         /* Setup cipher OID */
448
449         ec->cipher = cipher;
450         return 1;
451         }
452