x_exten.c revision 68651 
1/* crypto/asn1/x_exten.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/asn1_mac.h>
63#include <openssl/x509.h>
64
65int i2d_X509_EXTENSION(X509_EXTENSION *a, unsigned char **pp)
66	{
67	int k=0;
68	int r=0,ret=0;
69	unsigned char **p=NULL;
70
71	if (a == NULL) return(0);
72
73	p=NULL;
74	for (;;)
75		{
76		if (k)
77			{
78			r=ASN1_object_size(1,ret,V_ASN1_SEQUENCE);
79			if (pp == NULL) return(r);
80			p=pp;
81			ASN1_put_object(p,1,ret,V_ASN1_SEQUENCE,
82				V_ASN1_UNIVERSAL);
83			}
84
85		ret+=i2d_ASN1_OBJECT(a->object,p);
86		if ((a->critical) || a->netscape_hack)
87			ret+=i2d_ASN1_BOOLEAN(a->critical,p);
88		ret+=i2d_ASN1_OCTET_STRING(a->value,p);
89		if (k++) return(r);
90		}
91	}
92
93X509_EXTENSION *d2i_X509_EXTENSION(X509_EXTENSION **a, unsigned char **pp,
94	     long length)
95	{
96	int i;
97	M_ASN1_D2I_vars(a,X509_EXTENSION *,X509_EXTENSION_new);
98
99	M_ASN1_D2I_Init();
100	M_ASN1_D2I_start_sequence();
101	M_ASN1_D2I_get(ret->object,d2i_ASN1_OBJECT);
102
103	ret->netscape_hack=0;
104	if ((c.slen != 0) &&
105		(M_ASN1_next == (V_ASN1_UNIVERSAL|V_ASN1_BOOLEAN)))
106		{
107		c.q=c.p;
108		if (d2i_ASN1_BOOLEAN(&i,&c.p,c.slen) < 0) goto err;
109		ret->critical=i;
110		c.slen-=(c.p-c.q);
111		if (ret->critical == 0) ret->netscape_hack=1;
112		}
113	M_ASN1_D2I_get(ret->value,d2i_ASN1_OCTET_STRING);
114
115	M_ASN1_D2I_Finish(a,X509_EXTENSION_free,ASN1_F_D2I_X509_EXTENSION);
116	}
117
118X509_EXTENSION *X509_EXTENSION_new(void)
119	{
120	X509_EXTENSION *ret=NULL;
121	ASN1_CTX c;
122
123	M_ASN1_New_Malloc(ret,X509_EXTENSION);
124	ret->object=OBJ_nid2obj(NID_undef);
125	M_ASN1_New(ret->value,M_ASN1_OCTET_STRING_new);
126	ret->critical=0;
127	ret->netscape_hack=0;
128	return(ret);
129	M_ASN1_New_Error(ASN1_F_X509_EXTENSION_NEW);
130	}
131
132void X509_EXTENSION_free(X509_EXTENSION *a)
133	{
134	if (a == NULL) return;
135	ASN1_OBJECT_free(a->object);
136	M_ASN1_OCTET_STRING_free(a->value);
137	OPENSSL_free(a);
138	}
139
140