f7b5da1f14bbba75677ab775094d1256179f0e69
[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                         if(!p7->d.sign  || !p7->d.sign->contents->d.ptr)
88                                 ret = 1;
89                         else ret = 0;
90                                 
91                         p7->detached = ret;
92                         }
93                 else
94                         {
95                         PKCS7err(PKCS7_F_PKCS7_CTRL,PKCS7_R_OPERATION_NOT_SUPPORTED_ON_THIS_TYPE);
96                         ret=0;
97                         }
98                         
99                 break;
100         default:
101                 PKCS7err(PKCS7_F_PKCS7_CTRL,PKCS7_R_UNKNOWN_OPERATION);
102                 ret=0;
103                 }
104         return(ret);
105         }
106
107 int PKCS7_content_new(PKCS7 *p7, int type)
108         {
109         PKCS7 *ret=NULL;
110
111         if ((ret=PKCS7_new()) == NULL) goto err;
112         if (!PKCS7_set_type(ret,type)) goto err;
113         if (!PKCS7_set_content(p7,ret)) goto err;
114
115         return(1);
116 err:
117         if (ret != NULL) PKCS7_free(ret);
118         return(0);
119         }
120
121 int PKCS7_set_content(PKCS7 *p7, PKCS7 *p7_data)
122         {
123         int i;
124
125         i=OBJ_obj2nid(p7->type);
126         switch (i)
127                 {
128         case NID_pkcs7_signed:
129                 if (p7->d.sign->contents != NULL)
130                         PKCS7_free(p7->d.sign->contents);
131                 p7->d.sign->contents=p7_data;
132                 break;
133         case NID_pkcs7_digest:
134         case NID_pkcs7_data:
135         case NID_pkcs7_enveloped:
136         case NID_pkcs7_signedAndEnveloped:
137         case NID_pkcs7_encrypted:
138         default:
139                 PKCS7err(PKCS7_F_PKCS7_SET_CONTENT,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
140                 goto err;
141                 }
142         return(1);
143 err:
144         return(0);
145         }
146
147 int PKCS7_set_type(PKCS7 *p7, int type)
148         {
149         ASN1_OBJECT *obj;
150
151         /*PKCS7_content_free(p7);*/
152         obj=OBJ_nid2obj(type); /* will not fail */
153
154         switch (type)
155                 {
156         case NID_pkcs7_signed:
157                 p7->type=obj;
158                 if ((p7->d.sign=PKCS7_SIGNED_new()) == NULL)
159                         goto err;
160                 ASN1_INTEGER_set(p7->d.sign->version,1);
161                 break;
162         case NID_pkcs7_data:
163                 p7->type=obj;
164                 if ((p7->d.data=M_ASN1_OCTET_STRING_new()) == NULL)
165                         goto err;
166                 break;
167         case NID_pkcs7_signedAndEnveloped:
168                 p7->type=obj;
169                 if ((p7->d.signed_and_enveloped=PKCS7_SIGN_ENVELOPE_new())
170                         == NULL) goto err;
171                 ASN1_INTEGER_set(p7->d.signed_and_enveloped->version,1);
172                 p7->d.signed_and_enveloped->enc_data->content_type
173                                                 = OBJ_nid2obj(NID_pkcs7_data);
174                 break;
175         case NID_pkcs7_enveloped:
176                 p7->type=obj;
177                 if ((p7->d.enveloped=PKCS7_ENVELOPE_new())
178                         == NULL) goto err;
179                 ASN1_INTEGER_set(p7->d.enveloped->version,0);
180                 p7->d.enveloped->enc_data->content_type
181                                                 = OBJ_nid2obj(NID_pkcs7_data);
182                 break;
183         case NID_pkcs7_encrypted:
184                 p7->type=obj;
185                 if ((p7->d.encrypted=PKCS7_ENCRYPT_new())
186                         == NULL) goto err;
187                 ASN1_INTEGER_set(p7->d.encrypted->version,0);
188                 p7->d.encrypted->enc_data->content_type
189                                                 = OBJ_nid2obj(NID_pkcs7_data);
190                 break;
191
192         case NID_pkcs7_digest:
193         default:
194                 PKCS7err(PKCS7_F_PKCS7_SET_TYPE,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
195                 goto err;
196                 }
197         return(1);
198 err:
199         return(0);
200         }
201
202 int PKCS7_add_signer(PKCS7 *p7, PKCS7_SIGNER_INFO *psi)
203         {
204         int i,j,nid;
205         X509_ALGOR *alg;
206         STACK_OF(PKCS7_SIGNER_INFO) *signer_sk;
207         STACK_OF(X509_ALGOR) *md_sk;
208
209         i=OBJ_obj2nid(p7->type);
210         switch (i)
211                 {
212         case NID_pkcs7_signed:
213                 signer_sk=      p7->d.sign->signer_info;
214                 md_sk=          p7->d.sign->md_algs;
215                 break;
216         case NID_pkcs7_signedAndEnveloped:
217                 signer_sk=      p7->d.signed_and_enveloped->signer_info;
218                 md_sk=          p7->d.signed_and_enveloped->md_algs;
219                 break;
220         default:
221                 PKCS7err(PKCS7_F_PKCS7_ADD_SIGNER,PKCS7_R_WRONG_CONTENT_TYPE);
222                 return(0);
223                 }
224
225         nid=OBJ_obj2nid(psi->digest_alg->algorithm);
226
227         /* If the digest is not currently listed, add it */
228         j=0;
229         for (i=0; i<sk_X509_ALGOR_num(md_sk); i++)
230                 {
231                 alg=sk_X509_ALGOR_value(md_sk,i);
232                 if (OBJ_obj2nid(alg->algorithm) == nid)
233                         {
234                         j=1;
235                         break;
236                         }
237                 }
238         if (!j) /* we need to add another algorithm */
239                 {
240                 if(!(alg=X509_ALGOR_new())
241                         || !(alg->parameter = ASN1_TYPE_new())) {
242                         PKCS7err(PKCS7_F_PKCS7_ADD_SIGNER,ERR_R_MALLOC_FAILURE);
243                         return(0);
244                 }
245                 alg->algorithm=OBJ_nid2obj(nid);
246                 alg->parameter->type = V_ASN1_NULL;
247                 sk_X509_ALGOR_push(md_sk,alg);
248                 }
249
250         sk_PKCS7_SIGNER_INFO_push(signer_sk,psi);
251         return(1);
252         }
253
254 int PKCS7_add_certificate(PKCS7 *p7, X509 *x509)
255         {
256         int i;
257         STACK_OF(X509) **sk;
258
259         i=OBJ_obj2nid(p7->type);
260         switch (i)
261                 {
262         case NID_pkcs7_signed:
263                 sk= &(p7->d.sign->cert);
264                 break;
265         case NID_pkcs7_signedAndEnveloped:
266                 sk= &(p7->d.signed_and_enveloped->cert);
267                 break;
268         default:
269                 PKCS7err(PKCS7_F_PKCS7_ADD_CERTIFICATE,PKCS7_R_WRONG_CONTENT_TYPE);
270                 return(0);
271                 }
272
273         if (*sk == NULL)
274                 *sk=sk_X509_new_null();
275         CRYPTO_add(&x509->references,1,CRYPTO_LOCK_X509);
276         sk_X509_push(*sk,x509);
277         return(1);
278         }
279
280 int PKCS7_add_crl(PKCS7 *p7, X509_CRL *crl)
281         {
282         int i;
283         STACK_OF(X509_CRL) **sk;
284
285         i=OBJ_obj2nid(p7->type);
286         switch (i)
287                 {
288         case NID_pkcs7_signed:
289                 sk= &(p7->d.sign->crl);
290                 break;
291         case NID_pkcs7_signedAndEnveloped:
292                 sk= &(p7->d.signed_and_enveloped->crl);
293                 break;
294         default:
295                 PKCS7err(PKCS7_F_PKCS7_ADD_CRL,PKCS7_R_WRONG_CONTENT_TYPE);
296                 return(0);
297                 }
298
299         if (*sk == NULL)
300                 *sk=sk_X509_CRL_new_null();
301
302         CRYPTO_add(&crl->references,1,CRYPTO_LOCK_X509_CRL);
303         sk_X509_CRL_push(*sk,crl);
304         return(1);
305         }
306
307 int PKCS7_SIGNER_INFO_set(PKCS7_SIGNER_INFO *p7i, X509 *x509, EVP_PKEY *pkey,
308              EVP_MD *dgst)
309         {
310         char is_dsa;
311         if (pkey->type == EVP_PKEY_DSA) is_dsa = 1;
312         else is_dsa = 0;
313         /* We now need to add another PKCS7_SIGNER_INFO entry */
314         ASN1_INTEGER_set(p7i->version,1);
315         X509_NAME_set(&p7i->issuer_and_serial->issuer,
316                 X509_get_issuer_name(x509));
317
318         /* because ASN1_INTEGER_set is used to set a 'long' we will do
319          * things the ugly way. */
320         M_ASN1_INTEGER_free(p7i->issuer_and_serial->serial);
321         p7i->issuer_and_serial->serial=
322                 M_ASN1_INTEGER_dup(X509_get_serialNumber(x509));
323
324         /* lets keep the pkey around for a while */
325         CRYPTO_add(&pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
326         p7i->pkey=pkey;
327
328         /* Set the algorithms */
329         if (is_dsa) p7i->digest_alg->algorithm=OBJ_nid2obj(NID_sha1);
330         else    
331                 p7i->digest_alg->algorithm=OBJ_nid2obj(EVP_MD_type(dgst));
332
333         if (p7i->digest_alg->parameter != NULL)
334                 ASN1_TYPE_free(p7i->digest_alg->parameter);
335         if ((p7i->digest_alg->parameter=ASN1_TYPE_new()) == NULL)
336                 goto err;
337         p7i->digest_alg->parameter->type=V_ASN1_NULL;
338
339         p7i->digest_enc_alg->algorithm=OBJ_nid2obj(EVP_PKEY_type(pkey->type));
340
341         if (p7i->digest_enc_alg->parameter != NULL)
342                 ASN1_TYPE_free(p7i->digest_enc_alg->parameter);
343         if(is_dsa) p7i->digest_enc_alg->parameter = NULL;
344         else {
345                 if (!(p7i->digest_enc_alg->parameter=ASN1_TYPE_new()))
346                         goto err;
347                 p7i->digest_enc_alg->parameter->type=V_ASN1_NULL;
348         }
349
350         return(1);
351 err:
352         return(0);
353         }
354
355 PKCS7_SIGNER_INFO *PKCS7_add_signature(PKCS7 *p7, X509 *x509, EVP_PKEY *pkey,
356              EVP_MD *dgst)
357         {
358         PKCS7_SIGNER_INFO *si;
359
360         if ((si=PKCS7_SIGNER_INFO_new()) == NULL) goto err;
361         if (!PKCS7_SIGNER_INFO_set(si,x509,pkey,dgst)) goto err;
362         if (!PKCS7_add_signer(p7,si)) goto err;
363         return(si);
364 err:
365         return(NULL);
366         }
367
368 STACK_OF(PKCS7_SIGNER_INFO) *PKCS7_get_signer_info(PKCS7 *p7)
369         {
370         if (PKCS7_type_is_signed(p7))
371                 {
372                 return(p7->d.sign->signer_info);
373                 }
374         else if (PKCS7_type_is_signedAndEnveloped(p7))
375                 {
376                 return(p7->d.signed_and_enveloped->signer_info);
377                 }
378         else
379                 return(NULL);
380         }
381
382 PKCS7_RECIP_INFO *PKCS7_add_recipient(PKCS7 *p7, X509 *x509)
383         {
384         PKCS7_RECIP_INFO *ri;
385
386         if ((ri=PKCS7_RECIP_INFO_new()) == NULL) goto err;
387         if (!PKCS7_RECIP_INFO_set(ri,x509)) goto err;
388         if (!PKCS7_add_recipient_info(p7,ri)) goto err;
389         return(ri);
390 err:
391         return(NULL);
392         }
393
394 int PKCS7_add_recipient_info(PKCS7 *p7, PKCS7_RECIP_INFO *ri)
395         {
396         int i;
397         STACK_OF(PKCS7_RECIP_INFO) *sk;
398
399         i=OBJ_obj2nid(p7->type);
400         switch (i)
401                 {
402         case NID_pkcs7_signedAndEnveloped:
403                 sk=     p7->d.signed_and_enveloped->recipientinfo;
404                 break;
405         case NID_pkcs7_enveloped:
406                 sk=     p7->d.enveloped->recipientinfo;
407                 break;
408         default:
409                 PKCS7err(PKCS7_F_PKCS7_ADD_RECIPIENT_INFO,PKCS7_R_WRONG_CONTENT_TYPE);
410                 return(0);
411                 }
412
413         sk_PKCS7_RECIP_INFO_push(sk,ri);
414         return(1);
415         }
416
417 int PKCS7_RECIP_INFO_set(PKCS7_RECIP_INFO *p7i, X509 *x509)
418         {
419         ASN1_INTEGER_set(p7i->version,0);
420         X509_NAME_set(&p7i->issuer_and_serial->issuer,
421                 X509_get_issuer_name(x509));
422
423         M_ASN1_INTEGER_free(p7i->issuer_and_serial->serial);
424         p7i->issuer_and_serial->serial=
425                 M_ASN1_INTEGER_dup(X509_get_serialNumber(x509));
426
427         X509_ALGOR_free(p7i->key_enc_algor);
428         p7i->key_enc_algor= X509_ALGOR_dup(x509->cert_info->key->algor);
429
430         CRYPTO_add(&x509->references,1,CRYPTO_LOCK_X509);
431         p7i->cert=x509;
432
433         return(1);
434         }
435
436 X509 *PKCS7_cert_from_signer_info(PKCS7 *p7, PKCS7_SIGNER_INFO *si)
437         {
438         if (PKCS7_type_is_signed(p7))
439                 return(X509_find_by_issuer_and_serial(p7->d.sign->cert,
440                         si->issuer_and_serial->issuer,
441                         si->issuer_and_serial->serial));
442         else
443                 return(NULL);
444         }
445
446 int PKCS7_set_cipher(PKCS7 *p7, const EVP_CIPHER *cipher)
447         {
448         int i;
449         ASN1_OBJECT *objtmp;
450         PKCS7_ENC_CONTENT *ec;
451
452         i=OBJ_obj2nid(p7->type);
453         switch (i)
454                 {
455         case NID_pkcs7_signedAndEnveloped:
456                 ec=p7->d.signed_and_enveloped->enc_data;
457                 break;
458         case NID_pkcs7_enveloped:
459                 ec=p7->d.enveloped->enc_data;
460                 break;
461         default:
462                 PKCS7err(PKCS7_F_PKCS7_SET_CIPHER,PKCS7_R_WRONG_CONTENT_TYPE);
463                 return(0);
464                 }
465
466         /* Check cipher OID exists and has data in it*/
467         i = EVP_CIPHER_type(cipher);
468         if(i == NID_undef) {
469                 PKCS7err(PKCS7_F_PKCS7_SET_CIPHER,PKCS7_R_CIPHER_HAS_NO_OBJECT_IDENTIFIER);
470                 return(0);
471         }
472         objtmp = OBJ_nid2obj(i);
473
474         ec->cipher = cipher;
475         return 1;
476         }
477