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1/* crypto/asn1/a_enum.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
63/*
64 * Code for ENUMERATED type: identical to INTEGER apart from a different tag.
65 * for comments on encoding see a_int.c
66 */
67
68ASN1_ENUMERATED *ASN1_ENUMERATED_new(void)
69{ return M_ASN1_ENUMERATED_new(); }
70
71void ASN1_ENUMERATED_free(ASN1_ENUMERATED *x)
72{ M_ASN1_ENUMERATED_free(x); }
73
74
75int i2d_ASN1_ENUMERATED(ASN1_ENUMERATED *a, unsigned char **pp)
76{
77 int len, ret;
78 if(!a) return 0;
79 len = i2c_ASN1_INTEGER(a, NULL);
80 ret=ASN1_object_size(0,len,V_ASN1_ENUMERATED);
81 if(pp) {
82 ASN1_put_object(pp,0,len,V_ASN1_ENUMERATED,V_ASN1_UNIVERSAL);
83 i2c_ASN1_INTEGER(a, pp);
84 }
85 return ret;
86}
87
88ASN1_ENUMERATED *d2i_ASN1_ENUMERATED(ASN1_ENUMERATED **a, unsigned char **pp,
89 long length)
90{
91 unsigned char *p;
92 long len;
93 int i;
94 int inf,tag,xclass;
95 ASN1_ENUMERATED *ret;
96
97 p= *pp;
98 inf=ASN1_get_object(&p,&len,&tag,&xclass,length);
99 if (inf & 0x80)
100 {
101 i=ASN1_R_BAD_OBJECT_HEADER;
102 goto err;
103 }
104
105 if (tag != V_ASN1_ENUMERATED)
106 {
107 i=ASN1_R_EXPECTING_AN_ENUMERATED;
108 goto err;
109 }
110 ret = c2i_ASN1_INTEGER(a, &p, len);
111 if(ret) {
112 ret->type = (V_ASN1_NEG & ret->type) | V_ASN1_ENUMERATED;
113 *pp = p;
114 }
115 return ret;
116err:
117 ASN1err(ASN1_F_D2I_ASN1_ENUMERATED,i);
118 return(NULL);
119
120}
121
122int ASN1_ENUMERATED_set(ASN1_ENUMERATED *a, long v)
123 {
124 int i,j,k;
125 unsigned char buf[sizeof(long)+1];
126 long d;
127
128 a->type=V_ASN1_ENUMERATED;
129 if (a->length < (sizeof(long)+1))
130 {
131 if (a->data != NULL)
132 OPENSSL_free(a->data);
133 if ((a->data=(unsigned char *)OPENSSL_malloc(sizeof(long)+1)) != NULL)
134 memset((char *)a->data,0,sizeof(long)+1);
135 }
136 if (a->data == NULL)
137 {
138 ASN1err(ASN1_F_ASN1_ENUMERATED_SET,ERR_R_MALLOC_FAILURE);
139 return(0);
140 }
141 d=v;
142 if (d < 0)
143 {
144 d= -d;
145 a->type=V_ASN1_NEG_ENUMERATED;
146 }
147
148 for (i=0; i<sizeof(long); i++)
149 {
150 if (d == 0) break;
151 buf[i]=(int)d&0xff;
152 d>>=8;
153 }
154 j=0;
155 for (k=i-1; k >=0; k--)
156 a->data[j++]=buf[k];
157 a->length=j;
158 return(1);
159 }
160
161long ASN1_ENUMERATED_get(ASN1_ENUMERATED *a)
162 {
163 int neg=0,i;
164 long r=0;
165
166 if (a == NULL) return(0L);
167 i=a->type;
168 if (i == V_ASN1_NEG_ENUMERATED)
169 neg=1;
170 else if (i != V_ASN1_ENUMERATED)
171 return(0);
172
173 if (a->length > sizeof(long))
174 {
175 /* hmm... a bit ugly */
176 return(0xffffffffL);
177 }
178 if (a->data == NULL)
179 return(0);
180
181 for (i=0; i<a->length; i++)
182 {
183 r<<=8;
184 r|=(unsigned char)a->data[i];
185 }
186 if (neg) r= -r;
187 return(r);
188 }
189
190ASN1_ENUMERATED *BN_to_ASN1_ENUMERATED(BIGNUM *bn, ASN1_ENUMERATED *ai)
191 {
192 ASN1_ENUMERATED *ret;
193 int len,j;
194
195 if (ai == NULL)
196 ret=M_ASN1_ENUMERATED_new();
197 else
198 ret=ai;
199 if (ret == NULL)
200 {
201 ASN1err(ASN1_F_BN_TO_ASN1_ENUMERATED,ERR_R_NESTED_ASN1_ERROR);
202 goto err;
203 }
204 if(bn->neg) ret->type = V_ASN1_NEG_ENUMERATED;
205 else ret->type=V_ASN1_ENUMERATED;
206 j=BN_num_bits(bn);
207 len=((j == 0)?0:((j/8)+1));
208 ret->data=(unsigned char *)OPENSSL_malloc(len+4);
209 ret->length=BN_bn2bin(bn,ret->data);
210 return(ret);
211err:
212 if (ret != ai) M_ASN1_ENUMERATED_free(ret);
213 return(NULL);
214 }
215
216BIGNUM *ASN1_ENUMERATED_to_BN(ASN1_ENUMERATED *ai, BIGNUM *bn)
217 {
218 BIGNUM *ret;
219
220 if ((ret=BN_bin2bn(ai->data,ai->length,bn)) == NULL)
221 ASN1err(ASN1_F_ASN1_ENUMERATED_TO_BN,ASN1_R_BN_LIB);
222 else if(ai->type == V_ASN1_NEG_ENUMERATED) ret->neg = 1;
223 return(ret);
224 }
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