Add manual pages for certficate/key loading and friends.
[openssl.git] / crypto / asn1 / p7_lib.c
1 /* crypto/asn1/p7_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/asn1_mac.h>
62 #include <openssl/pkcs7.h>
63 #include <openssl/objects.h>
64
65 #ifdef PKCS7_INDEFINITE_ENCODING
66
67 int i2d_PKCS7(PKCS7 *a, unsigned char **pp)
68         {
69         M_ASN1_I2D_vars(a);
70
71         if (a->asn1 != NULL)
72                 {
73                 if (pp == NULL)
74                         return((int)a->length);
75                 memcpy(*pp,a->asn1,(int)a->length);
76                 *pp+=a->length;
77                 return((int)a->length);
78                 }
79
80         ret+=4; /* sequence, BER header plus '0 0' end padding */
81         M_ASN1_I2D_len(a->type,i2d_ASN1_OBJECT);
82         if (a->d.ptr != NULL)
83                 {
84                 ret+=4; /* explicit tag [ 0 ] BER plus '0 0' */
85                 switch (OBJ_obj2nid(a->type))
86                         {
87                 case NID_pkcs7_data:
88                         M_ASN1_I2D_len(a->d.data,i2d_ASN1_OCTET_STRING);
89                         break;
90                 case NID_pkcs7_signed:
91                         M_ASN1_I2D_len(a->d.sign,i2d_PKCS7_SIGNED);
92                         break;
93                 case NID_pkcs7_enveloped:
94                         M_ASN1_I2D_len(a->d.enveloped,i2d_PKCS7_ENVELOPE);
95                         break;
96                 case NID_pkcs7_signedAndEnveloped:
97                         M_ASN1_I2D_len(a->d.signed_and_enveloped,
98                                 i2d_PKCS7_SIGN_ENVELOPE);
99                         break;
100                 case NID_pkcs7_digest:
101                         M_ASN1_I2D_len(a->d.digest,i2d_PKCS7_DIGEST);
102                         break;
103                 case NID_pkcs7_encrypted:
104                         M_ASN1_I2D_len(a->d.encrypted,i2d_PKCS7_ENCRYPT);
105                         break;
106                 default:
107                         M_ASN1_I2D_len(a->d.other,i2d_ASN1_TYPE);
108                         break;
109                         }
110                 }
111         r=ret;
112         if (pp == NULL) return(r);
113         p= *pp;
114         M_ASN1_I2D_INF_seq_start(V_ASN1_SEQUENCE,V_ASN1_UNIVERSAL);
115         M_ASN1_I2D_put(a->type,i2d_ASN1_OBJECT);
116
117         if (a->d.ptr != NULL)
118                 {
119                 M_ASN1_I2D_INF_seq_start(0,V_ASN1_CONTEXT_SPECIFIC);
120                 switch (OBJ_obj2nid(a->type))
121                         {
122                 case NID_pkcs7_data:
123                         M_ASN1_I2D_put(a->d.data,i2d_ASN1_OCTET_STRING);
124                         break;
125                 case NID_pkcs7_signed:
126                         M_ASN1_I2D_put(a->d.sign,i2d_PKCS7_SIGNED);
127                         break;
128                 case NID_pkcs7_enveloped:
129                         M_ASN1_I2D_put(a->d.enveloped,i2d_PKCS7_ENVELOPE);
130                         break;
131                 case NID_pkcs7_signedAndEnveloped:
132                         M_ASN1_I2D_put(a->d.signed_and_enveloped,
133                                 i2d_PKCS7_SIGN_ENVELOPE);
134                         break;
135                 case NID_pkcs7_digest:
136                         M_ASN1_I2D_put(a->d.digest,i2d_PKCS7_DIGEST);
137                         break;
138                 case NID_pkcs7_encrypted:
139                         M_ASN1_I2D_put(a->d.encrypted,i2d_PKCS7_ENCRYPT);
140                         break;
141                 default:
142                         M_ASN1_I2D_put(a->d.other,i2d_ASN1_TYPE);
143                         break;
144                         }
145                 M_ASN1_I2D_INF_seq_end();
146                 }
147         M_ASN1_I2D_INF_seq_end();
148         M_ASN1_I2D_finish();
149         }
150
151 #else
152
153 int i2d_PKCS7(PKCS7 *a, unsigned char **pp)
154         {
155         int explen = 0;
156         M_ASN1_I2D_vars(a);
157
158         if (a->asn1 != NULL)
159                 {
160                 if (pp == NULL)
161                         return((int)a->length);
162                 memcpy(*pp,a->asn1,(int)a->length);
163                 *pp+=a->length;
164                 return((int)a->length);
165                 }
166
167         M_ASN1_I2D_len(a->type,i2d_ASN1_OBJECT);
168         if (a->d.ptr != NULL)
169                 {
170                 /* Save current length */
171                 r = ret;
172                 switch (OBJ_obj2nid(a->type))
173                         {
174                 case NID_pkcs7_data:
175                         M_ASN1_I2D_len(a->d.data,i2d_ASN1_OCTET_STRING);
176                         break;
177                 case NID_pkcs7_signed:
178                         M_ASN1_I2D_len(a->d.sign,i2d_PKCS7_SIGNED);
179                         break;
180                 case NID_pkcs7_enveloped:
181                         M_ASN1_I2D_len(a->d.enveloped,i2d_PKCS7_ENVELOPE);
182                         break;
183                 case NID_pkcs7_signedAndEnveloped:
184                         M_ASN1_I2D_len(a->d.signed_and_enveloped,
185                                 i2d_PKCS7_SIGN_ENVELOPE);
186                         break;
187                 case NID_pkcs7_digest:
188                         M_ASN1_I2D_len(a->d.digest,i2d_PKCS7_DIGEST);
189                         break;
190                 case NID_pkcs7_encrypted:
191                         M_ASN1_I2D_len(a->d.encrypted,i2d_PKCS7_ENCRYPT);
192                         break;
193                 default:
194                         M_ASN1_I2D_len(a->d.other,i2d_ASN1_TYPE);
195                         break;
196                         }
197                 /* Work out explicit tag content size */
198                 explen = ret - r;
199                 /* Work out explicit tag size: Note: ASN1_object_size
200                  * includes the content length.
201                  */
202                 ret =  r + ASN1_object_size(1, explen, 0);
203                 }
204
205         M_ASN1_I2D_seq_total();
206
207         M_ASN1_I2D_put(a->type,i2d_ASN1_OBJECT);
208
209         if (a->d.ptr != NULL)
210                 {
211                 ASN1_put_object(&p, 1, explen, 0, V_ASN1_CONTEXT_SPECIFIC);
212                 switch (OBJ_obj2nid(a->type))
213                         {
214                 case NID_pkcs7_data:
215                         M_ASN1_I2D_put(a->d.data,i2d_ASN1_OCTET_STRING);
216                         break;
217                 case NID_pkcs7_signed:
218                         M_ASN1_I2D_put(a->d.sign,i2d_PKCS7_SIGNED);
219                         break;
220                 case NID_pkcs7_enveloped:
221                         M_ASN1_I2D_put(a->d.enveloped,i2d_PKCS7_ENVELOPE);
222                         break;
223                 case NID_pkcs7_signedAndEnveloped:
224                         M_ASN1_I2D_put(a->d.signed_and_enveloped,
225                                 i2d_PKCS7_SIGN_ENVELOPE);
226                         break;
227                 case NID_pkcs7_digest:
228                         M_ASN1_I2D_put(a->d.digest,i2d_PKCS7_DIGEST);
229                         break;
230                 case NID_pkcs7_encrypted:
231                         M_ASN1_I2D_put(a->d.encrypted,i2d_PKCS7_ENCRYPT);
232                         break;
233                 default:
234                         M_ASN1_I2D_put(a->d.other,i2d_ASN1_TYPE);
235                         break;
236                         }
237                 }
238         M_ASN1_I2D_finish();
239         }
240
241 #endif
242
243 PKCS7 *d2i_PKCS7(PKCS7 **a, unsigned char **pp, long length)
244         {
245         M_ASN1_D2I_vars(a,PKCS7 *,PKCS7_new);
246
247         if ((a != NULL) && ((*a) != NULL))
248                 {
249                 if ((*a)->asn1 != NULL)
250                         {
251                         OPENSSL_free((*a)->asn1);
252                         (*a)->asn1=NULL;
253                         }
254                 (*a)->length=0;
255                 }
256
257         M_ASN1_D2I_Init();
258         M_ASN1_D2I_start_sequence();
259         M_ASN1_D2I_get(ret->type,d2i_ASN1_OBJECT);
260         if (!M_ASN1_D2I_end_sequence())
261                 {
262                 int Tinf,Ttag,Tclass;
263                 long Tlen;
264
265                 if (M_ASN1_next != (V_ASN1_CONSTRUCTED|
266                         V_ASN1_CONTEXT_SPECIFIC|0))
267                         {
268                         c.error=ASN1_R_BAD_PKCS7_CONTENT;
269                         c.line=__LINE__;
270                         goto err;
271                         }
272
273                 ret->detached=0;
274
275                 c.q=c.p;
276                 Tinf=ASN1_get_object(&c.p,&Tlen,&Ttag,&Tclass,
277                         (c.inf & 1)?(length+ *pp-c.q):c.slen);
278                 if (Tinf & 0x80) { c.line=__LINE__; goto err; }
279                 c.slen-=(c.p-c.q);
280
281                 switch (OBJ_obj2nid(ret->type))
282                         {
283                 case NID_pkcs7_data:
284                         M_ASN1_D2I_get(ret->d.data,d2i_ASN1_OCTET_STRING);
285                         break;
286                 case NID_pkcs7_signed:
287                         M_ASN1_D2I_get(ret->d.sign,d2i_PKCS7_SIGNED);
288                         if (ret->d.sign->contents->d.ptr == NULL)
289                                 ret->detached=1;
290                         break;
291                 case NID_pkcs7_enveloped:
292                         M_ASN1_D2I_get(ret->d.enveloped,d2i_PKCS7_ENVELOPE);
293                         break;
294                 case NID_pkcs7_signedAndEnveloped:
295                         M_ASN1_D2I_get(ret->d.signed_and_enveloped,
296                                 d2i_PKCS7_SIGN_ENVELOPE);
297                         break;
298                 case NID_pkcs7_digest:
299                         M_ASN1_D2I_get(ret->d.digest,d2i_PKCS7_DIGEST);
300                         break;
301                 case NID_pkcs7_encrypted:
302                         M_ASN1_D2I_get(ret->d.encrypted,d2i_PKCS7_ENCRYPT);
303                         break;
304                 default:
305                         M_ASN1_D2I_get(ret->d.other,d2i_ASN1_TYPE);
306                         break;
307                         }
308                 if (Tinf == (1|V_ASN1_CONSTRUCTED))
309                         {
310                         if (!ASN1_check_infinite_end(&c.p,c.slen))
311                                 {
312                                 c.error=ERR_R_MISSING_ASN1_EOS;
313                                 c.line=__LINE__;
314                                 goto err;
315                                 }
316                         }
317                 }
318         else
319                 ret->detached=1;
320                 
321         M_ASN1_D2I_Finish(a,PKCS7_free,ASN1_F_D2I_PKCS7);
322         }
323
324 PKCS7 *PKCS7_new(void)
325         {
326         PKCS7 *ret=NULL;
327         ASN1_CTX c;
328
329         M_ASN1_New_Malloc(ret,PKCS7);
330         ret->type=OBJ_nid2obj(NID_undef);
331         ret->asn1=NULL;
332         ret->length=0;
333         ret->detached=0;
334         ret->d.ptr=NULL;
335         return(ret);
336         M_ASN1_New_Error(ASN1_F_PKCS7_NEW);
337         }
338
339 void PKCS7_free(PKCS7 *a)
340         {
341         if (a == NULL) return;
342
343         PKCS7_content_free(a);
344         if (a->type != NULL)
345                 {
346                 ASN1_OBJECT_free(a->type);
347                 }
348         OPENSSL_free(a);
349         }
350
351 void PKCS7_content_free(PKCS7 *a)
352         {
353         if(a == NULL)
354             return;
355
356         if (a->asn1 != NULL) OPENSSL_free(a->asn1);
357
358         if (a->d.ptr != NULL)
359                 {
360                 if (a->type == NULL) return;
361
362                 switch (OBJ_obj2nid(a->type))
363                         {
364                 case NID_pkcs7_data:
365                         M_ASN1_OCTET_STRING_free(a->d.data);
366                         break;
367                 case NID_pkcs7_signed:
368                         PKCS7_SIGNED_free(a->d.sign);
369                         break;
370                 case NID_pkcs7_enveloped:
371                         PKCS7_ENVELOPE_free(a->d.enveloped);
372                         break;
373                 case NID_pkcs7_signedAndEnveloped:
374                         PKCS7_SIGN_ENVELOPE_free(a->d.signed_and_enveloped);
375                         break;
376                 case NID_pkcs7_digest:
377                         PKCS7_DIGEST_free(a->d.digest);
378                         break;
379                 case NID_pkcs7_encrypted:
380                         PKCS7_ENCRYPT_free(a->d.encrypted);
381                         break;
382                 default:
383                         ASN1_TYPE_free(a->d.other);
384                         break;
385                         }
386                 }
387         a->d.ptr=NULL;
388         }
389
390 IMPLEMENT_STACK_OF(PKCS7)
391 IMPLEMENT_ASN1_SET_OF(PKCS7)