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diff --git a/src/lib/libcrypto/asn1/a_enum.c b/src/lib/libcrypto/asn1/a_enum.c
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1/* $OpenBSD: a_enum.c,v 1.16 2014/09/21 12:17:42 miod Exp $ */
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
61#include <openssl/asn1.h>
62#include <openssl/bn.h>
63#include <openssl/err.h>
64
65/*
66 * Code for ENUMERATED type: identical to INTEGER apart from a different tag.
67 * for comments on encoding see a_int.c
68 */
69
70int
71ASN1_ENUMERATED_set(ASN1_ENUMERATED *a, long v)
72{
73 int j, k;
74 unsigned int i;
75 unsigned char buf[sizeof(long) + 1];
76 long d;
77
78 a->type = V_ASN1_ENUMERATED;
79 if (a->length < (int)(sizeof(long) + 1)) {
80 free(a->data);
81 a->data = calloc(1, sizeof(long) + 1);
82 }
83 if (a->data == NULL) {
84 ASN1err(ASN1_F_ASN1_ENUMERATED_SET, ERR_R_MALLOC_FAILURE);
85 return (0);
86 }
87 d = v;
88 if (d < 0) {
89 d = -d;
90 a->type = V_ASN1_NEG_ENUMERATED;
91 }
92
93 for (i = 0; i < sizeof(long); i++) {
94 if (d == 0)
95 break;
96 buf[i] = (int)d & 0xff;
97 d >>= 8;
98 }
99 j = 0;
100 for (k = i - 1; k >= 0; k--)
101 a->data[j++] = buf[k];
102 a->length = j;
103 return (1);
104}
105
106long
107ASN1_ENUMERATED_get(ASN1_ENUMERATED *a)
108{
109 int neg = 0, i;
110 long r = 0;
111
112 if (a == NULL)
113 return (0L);
114 i = a->type;
115 if (i == V_ASN1_NEG_ENUMERATED)
116 neg = 1;
117 else if (i != V_ASN1_ENUMERATED)
118 return -1;
119
120 if (a->length > (int)sizeof(long)) {
121 /* hmm... a bit ugly */
122 return -1;
123 }
124 if (a->data == NULL)
125 return 0;
126
127 for (i = 0; i < a->length; i++) {
128 r <<= 8;
129 r |= (unsigned char)a->data[i];
130 }
131 if (neg)
132 r = -r;
133 return (r);
134}
135
136ASN1_ENUMERATED *
137BN_to_ASN1_ENUMERATED(BIGNUM *bn, ASN1_ENUMERATED *ai)
138{
139 ASN1_ENUMERATED *ret;
140 int len, j;
141
142 if (ai == NULL)
143 ret = M_ASN1_ENUMERATED_new();
144 else
145 ret = ai;
146 if (ret == NULL) {
147 ASN1err(ASN1_F_BN_TO_ASN1_ENUMERATED, ERR_R_NESTED_ASN1_ERROR);
148 goto err;
149 }
150 if (BN_is_negative(bn))
151 ret->type = V_ASN1_NEG_ENUMERATED;
152 else
153 ret->type = V_ASN1_ENUMERATED;
154 j = BN_num_bits(bn);
155 len = ((j == 0) ? 0 : ((j / 8) + 1));
156 if (ret->length < len + 4) {
157 unsigned char *new_data = realloc(ret->data, len + 4);
158 if (!new_data) {
159 ASN1err(ASN1_F_BN_TO_ASN1_ENUMERATED, ERR_R_MALLOC_FAILURE);
160 goto err;
161 }
162 ret->data = new_data;
163 }
164 ret->length = BN_bn2bin(bn, ret->data);
165
166 /* Correct zero case */
167 if (!ret->length) {
168 ret->data[0] = 0;
169 ret->length = 1;
170 }
171 return (ret);
172
173err:
174 if (ret != ai)
175 M_ASN1_ENUMERATED_free(ret);
176 return (NULL);
177}
178
179BIGNUM *
180ASN1_ENUMERATED_to_BN(ASN1_ENUMERATED *ai, BIGNUM *bn)
181{
182 BIGNUM *ret;
183
184 if ((ret = BN_bin2bn(ai->data, ai->length, bn)) == NULL)
185 ASN1err(ASN1_F_ASN1_ENUMERATED_TO_BN, ASN1_R_BN_LIB);
186 else if (ai->type == V_ASN1_NEG_ENUMERATED)
187 BN_set_negative(ret, 1);
188 return (ret);
189}
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