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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 "asn1_mac.h"
62#include "objects.h"
63
64/* ASN1err(ASN1_F_D2I_PKCS7,ASN1_R_BAD_PKCS7_CONTENT);
65 * ASN1err(ASN1_F_I2D_PKCS7,ASN1_R_BAD_PKCS7_TYPE);
66 * ASN1err(ASN1_F_PKCS7_NEW,ASN1_R_BAD_PKCS7_TYPE);
67 */
68
69int i2d_PKCS7(a,pp)
70PKCS7 *a;
71unsigned char **pp;
72 {
73 M_ASN1_I2D_vars(a);
74
75 if (a->asn1 != NULL)
76 {
77 if (pp == NULL)
78 return((int)a->length);
79 memcpy(*pp,a->asn1,(int)a->length);
80 *pp+=a->length;
81 return((int)a->length);
82 }
83
84 ret+=4; /* sequence, BER header plus '0 0' end padding */
85 M_ASN1_I2D_len(a->type,i2d_ASN1_OBJECT);
86 if (a->d.ptr != NULL)
87 {
88 ret+=4; /* explicit tag [ 0 ] BER plus '0 0' */
89 switch (OBJ_obj2nid(a->type))
90 {
91 case NID_pkcs7_data:
92 M_ASN1_I2D_len(a->d.data,i2d_ASN1_OCTET_STRING);
93 break;
94 case NID_pkcs7_signed:
95 M_ASN1_I2D_len(a->d.sign,i2d_PKCS7_SIGNED);
96 break;
97 case NID_pkcs7_enveloped:
98 M_ASN1_I2D_len(a->d.enveloped,i2d_PKCS7_ENVELOPE);
99 break;
100 case NID_pkcs7_signedAndEnveloped:
101 M_ASN1_I2D_len(a->d.signed_and_enveloped,
102 i2d_PKCS7_SIGN_ENVELOPE);
103 break;
104 case NID_pkcs7_digest:
105 M_ASN1_I2D_len(a->d.digest,i2d_PKCS7_DIGEST);
106 break;
107 case NID_pkcs7_encrypted:
108 M_ASN1_I2D_len(a->d.encrypted,i2d_PKCS7_ENCRYPT);
109 break;
110 default:
111 break;
112 }
113 }
114 r=ret;
115 if (pp == NULL) return(r);
116 p= *pp;
117 M_ASN1_I2D_INF_seq_start(V_ASN1_SEQUENCE,V_ASN1_UNIVERSAL);
118 M_ASN1_I2D_put(a->type,i2d_ASN1_OBJECT);
119
120 if (a->d.ptr != NULL)
121 {
122 M_ASN1_I2D_INF_seq_start(0,V_ASN1_CONTEXT_SPECIFIC);
123 switch (OBJ_obj2nid(a->type))
124 {
125 case NID_pkcs7_data:
126 M_ASN1_I2D_put(a->d.data,i2d_ASN1_OCTET_STRING);
127 break;
128 case NID_pkcs7_signed:
129 M_ASN1_I2D_put(a->d.sign,i2d_PKCS7_SIGNED);
130 break;
131 case NID_pkcs7_enveloped:
132 M_ASN1_I2D_put(a->d.enveloped,i2d_PKCS7_ENVELOPE);
133 break;
134 case NID_pkcs7_signedAndEnveloped:
135 M_ASN1_I2D_put(a->d.signed_and_enveloped,
136 i2d_PKCS7_SIGN_ENVELOPE);
137 break;
138 case NID_pkcs7_digest:
139 M_ASN1_I2D_put(a->d.digest,i2d_PKCS7_DIGEST);
140 break;
141 case NID_pkcs7_encrypted:
142 M_ASN1_I2D_put(a->d.encrypted,i2d_PKCS7_ENCRYPT);
143 break;
144 default:
145 break;
146 }
147 M_ASN1_I2D_INF_seq_end();
148 }
149 M_ASN1_I2D_INF_seq_end();
150 M_ASN1_I2D_finish();
151 }
152
153PKCS7 *d2i_PKCS7(a,pp,length)
154PKCS7 **a;
155unsigned char **pp;
156long length;
157 {
158 M_ASN1_D2I_vars(a,PKCS7 *,PKCS7_new);
159
160 if ((a != NULL) && ((*a) != NULL))
161 {
162 if ((*a)->asn1 != NULL)
163 {
164 Free((char *)(*a)->asn1);
165 (*a)->asn1=NULL;
166 }
167 (*a)->length=0;
168 }
169
170 M_ASN1_D2I_Init();
171 M_ASN1_D2I_start_sequence();
172 M_ASN1_D2I_get(ret->type,d2i_ASN1_OBJECT);
173 if (!M_ASN1_D2I_end_sequence())
174 {
175 int Tinf,Ttag,Tclass;
176 long Tlen;
177
178 if (M_ASN1_next != (V_ASN1_CONSTRUCTED|
179 V_ASN1_CONTEXT_SPECIFIC|0))
180 {
181 c.error=ASN1_R_BAD_PKCS7_CONTENT;
182 goto err;
183 }
184
185 ret->detached=0;
186
187 c.q=c.p;
188 Tinf=ASN1_get_object(&c.p,&Tlen,&Ttag,&Tclass,
189 (c.inf & 1)?(length+ *pp-c.q):c.slen);
190 if (Tinf & 0x80) goto err;
191 c.slen-=(c.p-c.q);
192
193 switch (OBJ_obj2nid(ret->type))
194 {
195 case NID_pkcs7_data:
196 M_ASN1_D2I_get(ret->d.data,d2i_ASN1_OCTET_STRING);
197 break;
198 case NID_pkcs7_signed:
199 M_ASN1_D2I_get(ret->d.sign,d2i_PKCS7_SIGNED);
200 if (ret->d.sign->contents->d.ptr == NULL)
201 ret->detached=1;
202 break;
203 case NID_pkcs7_enveloped:
204 M_ASN1_D2I_get(ret->d.enveloped,d2i_PKCS7_ENVELOPE);
205 break;
206 case NID_pkcs7_signedAndEnveloped:
207 M_ASN1_D2I_get(ret->d.signed_and_enveloped,
208 d2i_PKCS7_SIGN_ENVELOPE);
209 break;
210 case NID_pkcs7_digest:
211 M_ASN1_D2I_get(ret->d.digest,d2i_PKCS7_DIGEST);
212 break;
213 case NID_pkcs7_encrypted:
214 M_ASN1_D2I_get(ret->d.encrypted,d2i_PKCS7_ENCRYPT);
215 break;
216 default:
217 c.error=ASN1_R_BAD_PKCS7_TYPE;
218 goto err;
219 break;
220 }
221 if (Tinf == (1|V_ASN1_CONSTRUCTED))
222 {
223 if (!ASN1_check_infinite_end(&c.p,c.slen))
224 {
225 c.error=ASN1_R_MISSING_EOS;
226 goto err;
227 }
228 }
229 }
230 else
231 ret->detached=1;
232
233 M_ASN1_D2I_Finish(a,PKCS7_free,ASN1_F_D2I_PKCS7);
234 }
235
236PKCS7 *PKCS7_new()
237 {
238 PKCS7 *ret=NULL;
239
240 M_ASN1_New_Malloc(ret,PKCS7);
241 ret->type=ASN1_OBJECT_new();
242 ret->asn1=NULL;
243 ret->length=0;
244 ret->detached=0;
245 ret->d.ptr=NULL;
246 return(ret);
247 M_ASN1_New_Error(ASN1_F_PKCS7_NEW);
248 }
249
250void PKCS7_free(a)
251PKCS7 *a;
252 {
253 if (a == NULL) return;
254
255 PKCS7_content_free(a);
256 if (a->type != NULL)
257 {
258 ASN1_OBJECT_free(a->type);
259 }
260 Free((char *)(char *)a);
261 }
262
263void PKCS7_content_free(a)
264PKCS7 *a;
265 {
266 if (a->asn1 != NULL) Free((char *)a->asn1);
267
268 if (a->d.ptr != NULL)
269 {
270 if (a->type == NULL) return;
271
272 switch (OBJ_obj2nid(a->type))
273 {
274 case NID_pkcs7_data:
275 ASN1_OCTET_STRING_free(a->d.data);
276 break;
277 case NID_pkcs7_signed:
278 PKCS7_SIGNED_free(a->d.sign);
279 break;
280 case NID_pkcs7_enveloped:
281 PKCS7_ENVELOPE_free(a->d.enveloped);
282 break;
283 case NID_pkcs7_signedAndEnveloped:
284 PKCS7_SIGN_ENVELOPE_free(a->d.signed_and_enveloped);
285 break;
286 case NID_pkcs7_digest:
287 PKCS7_DIGEST_free(a->d.digest);
288 break;
289 case NID_pkcs7_encrypted:
290 PKCS7_ENCRYPT_free(a->d.encrypted);
291 break;
292 default:
293 /* MEMORY LEAK */
294 break;
295 }
296 }
297 a->d.ptr=NULL;
298 }
299
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