1/* crypto/asn1/evp_asn1.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 <stdlib.h>
60#include <stdio.h>
61#include <string.h>
62#include <time.h>
63
64#if 0
65#include "cryptlib.h"
66#include <openssl/asn1.h>
67#include <openssl/asn1_mac.h>
68#else
69#include "cs-asn1.h"
70#define M_ASN1_D2I_start_sequence() \
71    if (!asn1_GetSequence(&c,&length)) \
72	{ c.line=__LINE__; goto err; }
73
74#endif
75
76int ASN1_TYPE_set_octetstring(ASN1_TYPE *a, unsigned char *data, int len)
77	{
78	ASN1_STRING *os;
79
80	if ((os=M_ASN1_OCTET_STRING_new()) == NULL) return(0);
81	if (!M_ASN1_OCTET_STRING_set(os,data,len)) return(0);
82	ASN1_TYPE_set(a,V_ASN1_OCTET_STRING,os);
83	return(1);
84	}
85
86/* int max_len:  for returned value    */
87int ASN1_TYPE_get_octetstring(ASN1_TYPE *a, unsigned char *data,
88	     int max_len)
89	{
90	int ret,num;
91	unsigned char *p;
92
93	if ((a->type != V_ASN1_OCTET_STRING) || (a->value.octet_string == NULL))
94		{
95		/* ASN1err(ASN1_F_ASN1_TYPE_GET_OCTETSTRING,ASN1_R_DATA_IS_WRONG); */
96		return(-1);
97		}
98	p=M_ASN1_STRING_data(a->value.octet_string);
99	ret=M_ASN1_STRING_length(a->value.octet_string);
100	if (ret < max_len)
101		num=ret;
102	else
103		num=max_len;
104	memcpy(data,p,num);
105	return(ret);
106	}
107
108int ASN1_TYPE_set_int_octetstring(ASN1_TYPE *a, long num, unsigned char *data,
109	     int len)
110	{
111	int n,size;
112	ASN1_OCTET_STRING os,*osp;
113	ASN1_INTEGER in;
114	unsigned char *p;
115	unsigned char buf[32]; /* when they have 256bit longs,
116				* I'll be in trouble */
117	in.data=buf;
118	in.length=32;
119	os.data=data;
120	os.type=V_ASN1_OCTET_STRING;
121	os.length=len;
122	ASN1_INTEGER_set(&in,num);
123	n =  i2d_ASN1_INTEGER(&in,NULL);
124	n+=M_i2d_ASN1_OCTET_STRING(&os,NULL);
125
126	size=ASN1_object_size(1,n,V_ASN1_SEQUENCE);
127
128	if ((osp=ASN1_STRING_new()) == NULL) return(0);
129	/* Grow the 'string' */
130	if (!ASN1_STRING_set(osp,NULL,size))
131		{
132		ASN1_STRING_free(osp);
133		return(0);
134		}
135
136	M_ASN1_STRING_length_set(osp, size);
137	p=M_ASN1_STRING_data(osp);
138
139	ASN1_put_object(&p,1,n,V_ASN1_SEQUENCE,V_ASN1_UNIVERSAL);
140	  i2d_ASN1_INTEGER(&in,&p);
141	M_i2d_ASN1_OCTET_STRING(&os,&p);
142
143	ASN1_TYPE_set(a,V_ASN1_SEQUENCE,osp);
144	return(1);
145	}
146
147/* we return the actual length..., num may be missing, in which
148 * case, set it to zero */
149/* int max_len:  for returned value    */
150int ASN1_TYPE_get_int_octetstring(ASN1_TYPE *a, long *num, unsigned char *data,
151	     int max_len)
152	{
153	int ret= -1,n;
154	ASN1_INTEGER *ai=NULL;
155	ASN1_OCTET_STRING *os=NULL;
156	const unsigned char *p;
157	long length;
158	ASN1_const_CTX c;
159
160	if ((a->type != V_ASN1_SEQUENCE) || (a->value.sequence == NULL))
161		{
162		goto err;
163		}
164	p=M_ASN1_STRING_data(a->value.sequence);
165	length=M_ASN1_STRING_length(a->value.sequence);
166
167	c.pp= &p;
168	c.p=p;
169	c.max=p+length;
170	c.error=ASN1_R_DATA_IS_WRONG;
171
172	M_ASN1_D2I_start_sequence();
173	c.q=c.p;
174	if ((ai=d2i_ASN1_INTEGER(NULL,&c.p,c.slen)) == NULL) goto err;
175        c.slen-=(c.p-c.q);
176	c.q=c.p;
177	if ((os=d2i_ASN1_OCTET_STRING(NULL,&c.p,c.slen)) == NULL) goto err;
178        c.slen-=(c.p-c.q);
179	if (!M_ASN1_D2I_end_sequence()) goto err;
180
181	if (num != NULL)
182		*num=ASN1_INTEGER_get(ai);
183
184	ret=M_ASN1_STRING_length(os);
185	if (max_len > ret)
186		n=ret;
187	else
188		n=max_len;
189
190	if (data != NULL)
191		memcpy(data,M_ASN1_STRING_data(os),n);
192	/*
193	if (0)
194		{
195err:
196		ASN1err(ASN1_F_ASN1_TYPE_GET_INT_OCTETSTRING,ASN1_R_DATA_IS_WRONG);
197		}
198	*/
199err:
200	if (os != NULL) M_ASN1_OCTET_STRING_free(os);
201	if (ai != NULL) M_ASN1_INTEGER_free(ai);
202	return(ret);
203	}
204
205