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d02b48c6 1/* crypto/asn1/p7_lib.c */
58964a49 2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
d02b48c6
RE
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"
ec577822
BM
61#include <openssl/asn1_mac.h>
62#include <openssl/objects.h>
d02b48c6
RE
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
6b691a5c 69int i2d_PKCS7(PKCS7 *a, unsigned char **pp)
d02b48c6
RE
70 {
71 M_ASN1_I2D_vars(a);
72
73 if (a->asn1 != NULL)
74 {
75 if (pp == NULL)
76 return((int)a->length);
77 memcpy(*pp,a->asn1,(int)a->length);
78 *pp+=a->length;
79 return((int)a->length);
80 }
81
82 ret+=4; /* sequence, BER header plus '0 0' end padding */
83 M_ASN1_I2D_len(a->type,i2d_ASN1_OBJECT);
84 if (a->d.ptr != NULL)
85 {
86 ret+=4; /* explicit tag [ 0 ] BER plus '0 0' */
87 switch (OBJ_obj2nid(a->type))
88 {
89 case NID_pkcs7_data:
90 M_ASN1_I2D_len(a->d.data,i2d_ASN1_OCTET_STRING);
91 break;
92 case NID_pkcs7_signed:
93 M_ASN1_I2D_len(a->d.sign,i2d_PKCS7_SIGNED);
94 break;
95 case NID_pkcs7_enveloped:
96 M_ASN1_I2D_len(a->d.enveloped,i2d_PKCS7_ENVELOPE);
97 break;
98 case NID_pkcs7_signedAndEnveloped:
99 M_ASN1_I2D_len(a->d.signed_and_enveloped,
100 i2d_PKCS7_SIGN_ENVELOPE);
101 break;
102 case NID_pkcs7_digest:
103 M_ASN1_I2D_len(a->d.digest,i2d_PKCS7_DIGEST);
104 break;
105 case NID_pkcs7_encrypted:
106 M_ASN1_I2D_len(a->d.encrypted,i2d_PKCS7_ENCRYPT);
107 break;
108 default:
109 break;
110 }
111 }
112 r=ret;
113 if (pp == NULL) return(r);
114 p= *pp;
115 M_ASN1_I2D_INF_seq_start(V_ASN1_SEQUENCE,V_ASN1_UNIVERSAL);
116 M_ASN1_I2D_put(a->type,i2d_ASN1_OBJECT);
117
118 if (a->d.ptr != NULL)
119 {
120 M_ASN1_I2D_INF_seq_start(0,V_ASN1_CONTEXT_SPECIFIC);
121 switch (OBJ_obj2nid(a->type))
122 {
123 case NID_pkcs7_data:
124 M_ASN1_I2D_put(a->d.data,i2d_ASN1_OCTET_STRING);
125 break;
126 case NID_pkcs7_signed:
127 M_ASN1_I2D_put(a->d.sign,i2d_PKCS7_SIGNED);
128 break;
129 case NID_pkcs7_enveloped:
130 M_ASN1_I2D_put(a->d.enveloped,i2d_PKCS7_ENVELOPE);
131 break;
132 case NID_pkcs7_signedAndEnveloped:
133 M_ASN1_I2D_put(a->d.signed_and_enveloped,
134 i2d_PKCS7_SIGN_ENVELOPE);
135 break;
136 case NID_pkcs7_digest:
137 M_ASN1_I2D_put(a->d.digest,i2d_PKCS7_DIGEST);
138 break;
139 case NID_pkcs7_encrypted:
140 M_ASN1_I2D_put(a->d.encrypted,i2d_PKCS7_ENCRYPT);
141 break;
142 default:
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
6b691a5c 151PKCS7 *d2i_PKCS7(PKCS7 **a, unsigned char **pp, long length)
d02b48c6
RE
152 {
153 M_ASN1_D2I_vars(a,PKCS7 *,PKCS7_new);
154
155 if ((a != NULL) && ((*a) != NULL))
156 {
157 if ((*a)->asn1 != NULL)
158 {
159 Free((char *)(*a)->asn1);
160 (*a)->asn1=NULL;
161 }
162 (*a)->length=0;
163 }
164
165 M_ASN1_D2I_Init();
166 M_ASN1_D2I_start_sequence();
167 M_ASN1_D2I_get(ret->type,d2i_ASN1_OBJECT);
168 if (!M_ASN1_D2I_end_sequence())
169 {
170 int Tinf,Ttag,Tclass;
171 long Tlen;
172
173 if (M_ASN1_next != (V_ASN1_CONSTRUCTED|
174 V_ASN1_CONTEXT_SPECIFIC|0))
175 {
176 c.error=ASN1_R_BAD_PKCS7_CONTENT;
dfeab068 177 c.line=__LINE__;
d02b48c6
RE
178 goto err;
179 }
180
181 ret->detached=0;
182
183 c.q=c.p;
184 Tinf=ASN1_get_object(&c.p,&Tlen,&Ttag,&Tclass,
185 (c.inf & 1)?(length+ *pp-c.q):c.slen);
dfeab068 186 if (Tinf & 0x80) { c.line=__LINE__; goto err; }
d02b48c6
RE
187 c.slen-=(c.p-c.q);
188
189 switch (OBJ_obj2nid(ret->type))
190 {
191 case NID_pkcs7_data:
192 M_ASN1_D2I_get(ret->d.data,d2i_ASN1_OCTET_STRING);
193 break;
194 case NID_pkcs7_signed:
195 M_ASN1_D2I_get(ret->d.sign,d2i_PKCS7_SIGNED);
196 if (ret->d.sign->contents->d.ptr == NULL)
197 ret->detached=1;
198 break;
199 case NID_pkcs7_enveloped:
200 M_ASN1_D2I_get(ret->d.enveloped,d2i_PKCS7_ENVELOPE);
201 break;
202 case NID_pkcs7_signedAndEnveloped:
203 M_ASN1_D2I_get(ret->d.signed_and_enveloped,
204 d2i_PKCS7_SIGN_ENVELOPE);
205 break;
206 case NID_pkcs7_digest:
207 M_ASN1_D2I_get(ret->d.digest,d2i_PKCS7_DIGEST);
208 break;
209 case NID_pkcs7_encrypted:
210 M_ASN1_D2I_get(ret->d.encrypted,d2i_PKCS7_ENCRYPT);
211 break;
212 default:
213 c.error=ASN1_R_BAD_PKCS7_TYPE;
dfeab068 214 c.line=__LINE__;
d02b48c6 215 goto err;
dfeab068 216 /* break; */
d02b48c6
RE
217 }
218 if (Tinf == (1|V_ASN1_CONSTRUCTED))
219 {
220 if (!ASN1_check_infinite_end(&c.p,c.slen))
221 {
dfeab068
RE
222 c.error=ERR_R_MISSING_ASN1_EOS;
223 c.line=__LINE__;
d02b48c6
RE
224 goto err;
225 }
226 }
227 }
228 else
229 ret->detached=1;
230
231 M_ASN1_D2I_Finish(a,PKCS7_free,ASN1_F_D2I_PKCS7);
232 }
233
6b691a5c 234PKCS7 *PKCS7_new(void)
d02b48c6
RE
235 {
236 PKCS7 *ret=NULL;
dfeab068 237 ASN1_CTX c;
d02b48c6
RE
238
239 M_ASN1_New_Malloc(ret,PKCS7);
dfeab068 240 ret->type=OBJ_nid2obj(NID_undef);
d02b48c6
RE
241 ret->asn1=NULL;
242 ret->length=0;
243 ret->detached=0;
244 ret->d.ptr=NULL;
245 return(ret);
246 M_ASN1_New_Error(ASN1_F_PKCS7_NEW);
247 }
248
6b691a5c 249void PKCS7_free(PKCS7 *a)
d02b48c6
RE
250 {
251 if (a == NULL) return;
252
253 PKCS7_content_free(a);
254 if (a->type != NULL)
255 {
256 ASN1_OBJECT_free(a->type);
257 }
258 Free((char *)(char *)a);
259 }
260
6b691a5c 261void PKCS7_content_free(PKCS7 *a)
d02b48c6 262 {
e03ddfae
BL
263 if(a == NULL)
264 return;
265
d02b48c6
RE
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