Kill evil casts, fix PKCS#7 and add new X509V3 Function.
[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_content_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=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 /*              p7->d.signed_and_enveloped->enc_data->content_type=
169                         OBJ_nid2obj(NID_pkcs7_encrypted);*/
170                         
171                 break;
172         case NID_pkcs7_enveloped:
173                 p7->type=obj;
174                 if ((p7->d.enveloped=PKCS7_ENVELOPE_new())
175                         == NULL) goto err;
176                 ASN1_INTEGER_set(p7->d.enveloped->version,0);
177                 break;
178         case NID_pkcs7_digest:
179         case NID_pkcs7_encrypted:
180         default:
181                 PKCS7err(PKCS7_F_PKCS7_SET_TYPE,PKCS7_R_UNSUPPORTED_CONTENT_TYPE);
182                 goto err;
183                 }
184         return(1);
185 err:
186         return(0);
187         }
188
189 int PKCS7_add_signer(PKCS7 *p7, PKCS7_SIGNER_INFO *psi)
190         {
191         int i,j,nid;
192         X509_ALGOR *alg;
193         STACK *signer_sk;
194         STACK *md_sk;
195
196         i=OBJ_obj2nid(p7->type);
197         switch (i)
198                 {
199         case NID_pkcs7_signed:
200                 signer_sk=      p7->d.sign->signer_info;
201                 md_sk=          p7->d.sign->md_algs;
202                 break;
203         case NID_pkcs7_signedAndEnveloped:
204                 signer_sk=      p7->d.signed_and_enveloped->signer_info;
205                 md_sk=          p7->d.signed_and_enveloped->md_algs;
206                 break;
207         default:
208                 PKCS7err(PKCS7_F_PKCS7_ADD_SIGNER,PKCS7_R_WRONG_CONTENT_TYPE);
209                 return(0);
210                 }
211
212         nid=OBJ_obj2nid(psi->digest_alg->algorithm);
213
214         /* If the digest is not currently listed, add it */
215         j=0;
216         for (i=0; i<sk_num(md_sk); i++)
217                 {
218                 alg=(X509_ALGOR *)sk_value(md_sk,i);
219                 if (OBJ_obj2nid(alg->algorithm) == nid)
220                         {
221                         j=1;
222                         break;
223                         }
224                 }
225         if (!j) /* we need to add another algorithm */
226                 {
227                 alg=X509_ALGOR_new();
228                 alg->algorithm=OBJ_nid2obj(nid);
229                 sk_push(md_sk,(char *)alg);
230                 }
231
232         sk_push(signer_sk,(char *)psi);
233         return(1);
234         }
235
236 int PKCS7_add_certificate(PKCS7 *p7, X509 *x509)
237         {
238         int i;
239         STACK_OF(X509) **sk;
240
241         i=OBJ_obj2nid(p7->type);
242         switch (i)
243                 {
244         case NID_pkcs7_signed:
245                 sk= &(p7->d.sign->cert);
246                 break;
247         case NID_pkcs7_signedAndEnveloped:
248                 sk= &(p7->d.signed_and_enveloped->cert);
249                 break;
250         default:
251                 PKCS7err(PKCS7_F_PKCS7_ADD_CERTIFICATE,PKCS7_R_WRONG_CONTENT_TYPE);
252                 return(0);
253                 }
254
255         if (*sk == NULL)
256                 *sk=sk_X509_new_null();
257         CRYPTO_add(&x509->references,1,CRYPTO_LOCK_X509);
258         sk_X509_push(*sk,x509);
259         return(1);
260         }
261
262 int PKCS7_add_crl(PKCS7 *p7, X509_CRL *crl)
263         {
264         int i;
265         STACK **sk;
266
267         i=OBJ_obj2nid(p7->type);
268         switch (i)
269                 {
270         case NID_pkcs7_signed:
271                 sk= &(p7->d.sign->crl);
272                 break;
273         case NID_pkcs7_signedAndEnveloped:
274                 sk= &(p7->d.signed_and_enveloped->crl);
275                 break;
276         default:
277                 PKCS7err(PKCS7_F_PKCS7_ADD_CRL,PKCS7_R_WRONG_CONTENT_TYPE);
278                 return(0);
279                 }
280
281         if (*sk == NULL)
282                 *sk=sk_new_null();
283
284         CRYPTO_add(&crl->references,1,CRYPTO_LOCK_X509_CRL);
285         sk_push(*sk,(char *)crl);
286         return(1);
287         }
288
289 int PKCS7_SIGNER_INFO_set(PKCS7_SIGNER_INFO *p7i, X509 *x509, EVP_PKEY *pkey,
290              EVP_MD *dgst)
291         {
292         /* We now need to add another PKCS7_SIGNER_INFO entry */
293         ASN1_INTEGER_set(p7i->version,1);
294         X509_NAME_set(&p7i->issuer_and_serial->issuer,
295                 X509_get_issuer_name(x509));
296
297         /* because ASN1_INTEGER_set is used to set a 'long' we will do
298          * things the ugly way. */
299         ASN1_INTEGER_free(p7i->issuer_and_serial->serial);
300         p7i->issuer_and_serial->serial=
301                 ASN1_INTEGER_dup(X509_get_serialNumber(x509));
302
303         /* lets keep the pkey around for a while */
304         CRYPTO_add(&pkey->references,1,CRYPTO_LOCK_EVP_PKEY);
305         p7i->pkey=pkey;
306
307         /* Set the algorithms */
308         if (pkey->type == EVP_PKEY_DSA)
309                 p7i->digest_alg->algorithm=OBJ_nid2obj(NID_sha1);
310         else    
311                 p7i->digest_alg->algorithm=OBJ_nid2obj(EVP_MD_type(dgst));
312
313         p7i->digest_enc_alg->algorithm=OBJ_nid2obj(EVP_PKEY_type(pkey->type));
314
315         if (p7i->digest_enc_alg->parameter != NULL)
316                 ASN1_TYPE_free(p7i->digest_enc_alg->parameter);
317         if ((p7i->digest_enc_alg->parameter=ASN1_TYPE_new()) == NULL)
318                 goto err;
319         p7i->digest_enc_alg->parameter->type=V_ASN1_NULL;
320
321         return(1);
322 err:
323         return(0);
324         }
325
326 PKCS7_SIGNER_INFO *PKCS7_add_signature(PKCS7 *p7, X509 *x509, EVP_PKEY *pkey,
327              EVP_MD *dgst)
328         {
329         PKCS7_SIGNER_INFO *si;
330
331         if ((si=PKCS7_SIGNER_INFO_new()) == NULL) goto err;
332         if (!PKCS7_SIGNER_INFO_set(si,x509,pkey,dgst)) goto err;
333         if (!PKCS7_add_signer(p7,si)) goto err;
334         return(si);
335 err:
336         return(NULL);
337         }
338
339 STACK *PKCS7_get_signer_info(PKCS7 *p7)
340         {
341         if (PKCS7_type_is_signed(p7))
342                 {
343                 return(p7->d.sign->signer_info);
344                 }
345         else if (PKCS7_type_is_signedAndEnveloped(p7))
346                 {
347                 return(p7->d.signed_and_enveloped->signer_info);
348                 }
349         else
350                 return(NULL);
351         }
352
353 PKCS7_RECIP_INFO *PKCS7_add_recipient(PKCS7 *p7, X509 *x509)
354         {
355         PKCS7_RECIP_INFO *ri;
356
357         if ((ri=PKCS7_RECIP_INFO_new()) == NULL) goto err;
358         if (!PKCS7_RECIP_INFO_set(ri,x509)) goto err;
359         if (!PKCS7_add_recipient_info(p7,ri)) goto err;
360         return(ri);
361 err:
362         return(NULL);
363         }
364
365 int PKCS7_add_recipient_info(PKCS7 *p7, PKCS7_RECIP_INFO *ri)
366         {
367         int i;
368         STACK *sk;
369
370         i=OBJ_obj2nid(p7->type);
371         switch (i)
372                 {
373         case NID_pkcs7_signedAndEnveloped:
374                 sk=     p7->d.signed_and_enveloped->recipientinfo;
375                 break;
376         case NID_pkcs7_enveloped:
377                 sk=     p7->d.enveloped->recipientinfo;
378                 break;
379         default:
380                 PKCS7err(PKCS7_F_PKCS7_ADD_RECIPIENT_INFO,PKCS7_R_WRONG_CONTENT_TYPE);
381                 return(0);
382                 }
383
384         sk_push(sk,(char *)ri);
385         return(1);
386         }
387
388 int PKCS7_RECIP_INFO_set(PKCS7_RECIP_INFO *p7i, X509 *x509)
389         {
390         ASN1_INTEGER_set(p7i->version,0);
391         X509_NAME_set(&p7i->issuer_and_serial->issuer,
392                 X509_get_issuer_name(x509));
393
394         ASN1_INTEGER_free(p7i->issuer_and_serial->serial);
395         p7i->issuer_and_serial->serial=
396                 ASN1_INTEGER_dup(X509_get_serialNumber(x509));
397
398         X509_ALGOR_free(p7i->key_enc_algor);
399         p7i->key_enc_algor=(X509_ALGOR *)ASN1_dup(i2d_X509_ALGOR,
400                 (char *(*)())d2i_X509_ALGOR,
401                 (char *)x509->cert_info->key->algor);
402
403         CRYPTO_add(&x509->references,1,CRYPTO_LOCK_X509);
404         p7i->cert=x509;
405
406         return(1);
407         }
408
409 X509 *PKCS7_cert_from_signer_info(PKCS7 *p7, PKCS7_SIGNER_INFO *si)
410         {
411         if (PKCS7_type_is_signed(p7))
412                 return(X509_find_by_issuer_and_serial(p7->d.sign->cert,
413                         si->issuer_and_serial->issuer,
414                         si->issuer_and_serial->serial));
415         else
416                 return(NULL);
417         }
418
419 int PKCS7_set_cipher(PKCS7 *p7, EVP_CIPHER *cipher)
420         {
421         int i;
422         PKCS7_ENC_CONTENT *ec;
423
424         i=OBJ_obj2nid(p7->type);
425         switch (i)
426                 {
427         case NID_pkcs7_signedAndEnveloped:
428                 ec=p7->d.signed_and_enveloped->enc_data;
429                 break;
430         case NID_pkcs7_enveloped:
431                 ec=p7->d.enveloped->enc_data;
432                 break;
433         default:
434                 PKCS7err(PKCS7_F_PKCS7_SET_CIPHER,PKCS7_R_WRONG_CONTENT_TYPE);
435                 return(0);
436                 }
437
438         ec->algorithm->algorithm=OBJ_nid2obj(EVP_CIPHER_nid(cipher));
439         return(ec->algorithm->algorithm != NULL);
440         }
441