90ead17dbc756a6bf719eb7de035fda40e8418a7
[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 int i2d_PKCS7(PKCS7 *a, unsigned char **pp)
66         {
67         M_ASN1_I2D_vars(a);
68
69         if (a->asn1 != NULL)
70                 {
71                 if (pp == NULL)
72                         return((int)a->length);
73                 memcpy(*pp,a->asn1,(int)a->length);
74                 *pp+=a->length;
75                 return((int)a->length);
76                 }
77
78         ret+=4; /* sequence, BER header plus '0 0' end padding */
79         M_ASN1_I2D_len(a->type,i2d_ASN1_OBJECT);
80         if (a->d.ptr != NULL)
81                 {
82                 ret+=4; /* explicit tag [ 0 ] BER plus '0 0' */
83                 switch (OBJ_obj2nid(a->type))
84                         {
85                 case NID_pkcs7_data:
86                         M_ASN1_I2D_len(a->d.data,i2d_ASN1_OCTET_STRING);
87                         break;
88                 case NID_pkcs7_signed:
89                         M_ASN1_I2D_len(a->d.sign,i2d_PKCS7_SIGNED);
90                         break;
91                 case NID_pkcs7_enveloped:
92                         M_ASN1_I2D_len(a->d.enveloped,i2d_PKCS7_ENVELOPE);
93                         break;
94                 case NID_pkcs7_signedAndEnveloped:
95                         M_ASN1_I2D_len(a->d.signed_and_enveloped,
96                                 i2d_PKCS7_SIGN_ENVELOPE);
97                         break;
98                 case NID_pkcs7_digest:
99                         M_ASN1_I2D_len(a->d.digest,i2d_PKCS7_DIGEST);
100                         break;
101                 case NID_pkcs7_encrypted:
102                         M_ASN1_I2D_len(a->d.encrypted,i2d_PKCS7_ENCRYPT);
103                         break;
104                 default:
105                         break;
106                         }
107                 }
108         r=ret;
109         if (pp == NULL) return(r);
110         p= *pp;
111         M_ASN1_I2D_INF_seq_start(V_ASN1_SEQUENCE,V_ASN1_UNIVERSAL);
112         M_ASN1_I2D_put(a->type,i2d_ASN1_OBJECT);
113
114         if (a->d.ptr != NULL)
115                 {
116                 M_ASN1_I2D_INF_seq_start(0,V_ASN1_CONTEXT_SPECIFIC);
117                 switch (OBJ_obj2nid(a->type))
118                         {
119                 case NID_pkcs7_data:
120                         M_ASN1_I2D_put(a->d.data,i2d_ASN1_OCTET_STRING);
121                         break;
122                 case NID_pkcs7_signed:
123                         M_ASN1_I2D_put(a->d.sign,i2d_PKCS7_SIGNED);
124                         break;
125                 case NID_pkcs7_enveloped:
126                         M_ASN1_I2D_put(a->d.enveloped,i2d_PKCS7_ENVELOPE);
127                         break;
128                 case NID_pkcs7_signedAndEnveloped:
129                         M_ASN1_I2D_put(a->d.signed_and_enveloped,
130                                 i2d_PKCS7_SIGN_ENVELOPE);
131                         break;
132                 case NID_pkcs7_digest:
133                         M_ASN1_I2D_put(a->d.digest,i2d_PKCS7_DIGEST);
134                         break;
135                 case NID_pkcs7_encrypted:
136                         M_ASN1_I2D_put(a->d.encrypted,i2d_PKCS7_ENCRYPT);
137                         break;
138                 default:
139                         break;
140                         }
141                 M_ASN1_I2D_INF_seq_end();
142                 }
143         M_ASN1_I2D_INF_seq_end();
144         M_ASN1_I2D_finish();
145         }
146
147 PKCS7 *d2i_PKCS7(PKCS7 **a, unsigned char **pp, long length)
148         {
149         M_ASN1_D2I_vars(a,PKCS7 *,PKCS7_new);
150
151         if ((a != NULL) && ((*a) != NULL))
152                 {
153                 if ((*a)->asn1 != NULL)
154                         {
155                         OPENSSL_free((*a)->asn1);
156                         (*a)->asn1=NULL;
157                         }
158                 (*a)->length=0;
159                 }
160
161         M_ASN1_D2I_Init();
162         M_ASN1_D2I_start_sequence();
163         M_ASN1_D2I_get(ret->type,d2i_ASN1_OBJECT);
164         if (!M_ASN1_D2I_end_sequence())
165                 {
166                 int Tinf,Ttag,Tclass;
167                 long Tlen;
168
169                 if (M_ASN1_next != (V_ASN1_CONSTRUCTED|
170                         V_ASN1_CONTEXT_SPECIFIC|0))
171                         {
172                         c.error=ASN1_R_BAD_PKCS7_CONTENT;
173                         c.line=__LINE__;
174                         goto err;
175                         }
176
177                 ret->detached=0;
178
179                 c.q=c.p;
180                 Tinf=ASN1_get_object(&c.p,&Tlen,&Ttag,&Tclass,
181                         (c.inf & 1)?(length+ *pp-c.q):c.slen);
182                 if (Tinf & 0x80) { c.line=__LINE__; goto err; }
183                 c.slen-=(c.p-c.q);
184
185                 switch (OBJ_obj2nid(ret->type))
186                         {
187                 case NID_pkcs7_data:
188                         M_ASN1_D2I_get(ret->d.data,d2i_ASN1_OCTET_STRING);
189                         break;
190                 case NID_pkcs7_signed:
191                         M_ASN1_D2I_get(ret->d.sign,d2i_PKCS7_SIGNED);
192                         if (ret->d.sign->contents->d.ptr == NULL)
193                                 ret->detached=1;
194                         break;
195                 case NID_pkcs7_enveloped:
196                         M_ASN1_D2I_get(ret->d.enveloped,d2i_PKCS7_ENVELOPE);
197                         break;
198                 case NID_pkcs7_signedAndEnveloped:
199                         M_ASN1_D2I_get(ret->d.signed_and_enveloped,
200                                 d2i_PKCS7_SIGN_ENVELOPE);
201                         break;
202                 case NID_pkcs7_digest:
203                         M_ASN1_D2I_get(ret->d.digest,d2i_PKCS7_DIGEST);
204                         break;
205                 case NID_pkcs7_encrypted:
206                         M_ASN1_D2I_get(ret->d.encrypted,d2i_PKCS7_ENCRYPT);
207                         break;
208                 default:
209                         c.error=ASN1_R_BAD_PKCS7_TYPE;
210                         c.line=__LINE__;
211                         goto err;
212                         /* break; */
213                         }
214                 if (Tinf == (1|V_ASN1_CONSTRUCTED))
215                         {
216                         if (!ASN1_check_infinite_end(&c.p,c.slen))
217                                 {
218                                 c.error=ERR_R_MISSING_ASN1_EOS;
219                                 c.line=__LINE__;
220                                 goto err;
221                                 }
222                         }
223                 }
224         else
225                 ret->detached=1;
226                 
227         M_ASN1_D2I_Finish(a,PKCS7_free,ASN1_F_D2I_PKCS7);
228         }
229
230 PKCS7 *PKCS7_new(void)
231         {
232         PKCS7 *ret=NULL;
233         ASN1_CTX c;
234
235         M_ASN1_New_Malloc(ret,PKCS7);
236         ret->type=OBJ_nid2obj(NID_undef);
237         ret->asn1=NULL;
238         ret->length=0;
239         ret->detached=0;
240         ret->d.ptr=NULL;
241         return(ret);
242         M_ASN1_New_Error(ASN1_F_PKCS7_NEW);
243         }
244
245 void PKCS7_free(PKCS7 *a)
246         {
247         if (a == NULL) return;
248
249         PKCS7_content_free(a);
250         if (a->type != NULL)
251                 {
252                 ASN1_OBJECT_free(a->type);
253                 }
254         OPENSSL_free(a);
255         }
256
257 void PKCS7_content_free(PKCS7 *a)
258         {
259         if(a == NULL)
260             return;
261
262         if (a->asn1 != NULL) OPENSSL_free(a->asn1);
263
264         if (a->d.ptr != NULL)
265                 {
266                 if (a->type == NULL) return;
267
268                 switch (OBJ_obj2nid(a->type))
269                         {
270                 case NID_pkcs7_data:
271                         M_ASN1_OCTET_STRING_free(a->d.data);
272                         break;
273                 case NID_pkcs7_signed:
274                         PKCS7_SIGNED_free(a->d.sign);
275                         break;
276                 case NID_pkcs7_enveloped:
277                         PKCS7_ENVELOPE_free(a->d.enveloped);
278                         break;
279                 case NID_pkcs7_signedAndEnveloped:
280                         PKCS7_SIGN_ENVELOPE_free(a->d.signed_and_enveloped);
281                         break;
282                 case NID_pkcs7_digest:
283                         PKCS7_DIGEST_free(a->d.digest);
284                         break;
285                 case NID_pkcs7_encrypted:
286                         PKCS7_ENCRYPT_free(a->d.encrypted);
287                         break;
288                 default:
289                         /* MEMORY LEAK */
290                         break;
291                         }
292                 }
293         a->d.ptr=NULL;
294         }
295
296 IMPLEMENT_STACK_OF(PKCS7)
297 IMPLEMENT_ASN1_SET_OF(PKCS7)