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