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119f6288 DSH |
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. | |
0f113f3e | 8 | * |
119f6288 DSH |
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). | |
0f113f3e | 15 | * |
119f6288 DSH |
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. | |
0f113f3e | 22 | * |
119f6288 DSH |
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 :-). | |
0f113f3e | 37 | * 4. If you include any Windows specific code (or a derivative thereof) from |
119f6288 DSH |
38 | * the apps directory (application code) you must include an acknowledgement: |
39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
0f113f3e | 40 | * |
119f6288 DSH |
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. | |
0f113f3e | 52 | * |
119f6288 DSH |
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" | |
ec577822 | 61 | #include <openssl/asn1.h> |
0f814687 | 62 | #include <openssl/bn.h> |
119f6288 | 63 | |
0f113f3e | 64 | /* |
1ad2ecb6 DSH |
65 | * Code for ENUMERATED type: identical to INTEGER apart from a different tag. |
66 | * for comments on encoding see a_int.c | |
67 | */ | |
119f6288 | 68 | |
6b691a5c | 69 | int ASN1_ENUMERATED_set(ASN1_ENUMERATED *a, long v) |
0f113f3e MC |
70 | { |
71 | int j, k; | |
72 | unsigned int i; | |
73 | unsigned char buf[sizeof(long) + 1]; | |
74 | long d; | |
119f6288 | 75 | |
0f113f3e MC |
76 | a->type = V_ASN1_ENUMERATED; |
77 | if (a->length < (int)(sizeof(long) + 1)) { | |
78 | if (a->data != NULL) | |
79 | OPENSSL_free(a->data); | |
80 | if ((a->data = | |
81 | (unsigned char *)OPENSSL_malloc(sizeof(long) + 1)) != NULL) | |
82 | memset((char *)a->data, 0, sizeof(long) + 1); | |
83 | } | |
84 | if (a->data == NULL) { | |
85 | ASN1err(ASN1_F_ASN1_ENUMERATED_SET, ERR_R_MALLOC_FAILURE); | |
86 | return (0); | |
87 | } | |
88 | d = v; | |
89 | if (d < 0) { | |
90 | d = -d; | |
91 | a->type = V_ASN1_NEG_ENUMERATED; | |
92 | } | |
119f6288 | 93 | |
0f113f3e MC |
94 | for (i = 0; i < sizeof(long); i++) { |
95 | if (d == 0) | |
96 | break; | |
97 | buf[i] = (int)d & 0xff; | |
98 | d >>= 8; | |
99 | } | |
100 | j = 0; | |
101 | for (k = i - 1; k >= 0; k--) | |
102 | a->data[j++] = buf[k]; | |
103 | a->length = j; | |
104 | return (1); | |
105 | } | |
119f6288 | 106 | |
6b691a5c | 107 | long ASN1_ENUMERATED_get(ASN1_ENUMERATED *a) |
0f113f3e MC |
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; | |
119f6288 | 119 | |
0f113f3e MC |
120 | if (a->length > (int)sizeof(long)) { |
121 | /* hmm... a bit ugly */ | |
122 | return (0xffffffffL); | |
123 | } | |
124 | if (a->data == NULL) | |
125 | return 0; | |
119f6288 | 126 | |
0f113f3e MC |
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 | } | |
119f6288 | 135 | |
6b691a5c | 136 | ASN1_ENUMERATED *BN_to_ASN1_ENUMERATED(BIGNUM *bn, ASN1_ENUMERATED *ai) |
0f113f3e MC |
137 | { |
138 | ASN1_ENUMERATED *ret; | |
139 | int len, j; | |
119f6288 | 140 | |
0f113f3e MC |
141 | if (ai == NULL) |
142 | ret = M_ASN1_ENUMERATED_new(); | |
143 | else | |
144 | ret = ai; | |
145 | if (ret == NULL) { | |
146 | ASN1err(ASN1_F_BN_TO_ASN1_ENUMERATED, ERR_R_NESTED_ASN1_ERROR); | |
147 | goto err; | |
148 | } | |
149 | if (BN_is_negative(bn)) | |
150 | ret->type = V_ASN1_NEG_ENUMERATED; | |
151 | else | |
152 | ret->type = V_ASN1_ENUMERATED; | |
153 | j = BN_num_bits(bn); | |
154 | len = ((j == 0) ? 0 : ((j / 8) + 1)); | |
155 | if (ret->length < len + 4) { | |
156 | unsigned char *new_data = OPENSSL_realloc(ret->data, len + 4); | |
157 | if (!new_data) { | |
158 | ASN1err(ASN1_F_BN_TO_ASN1_ENUMERATED, ERR_R_MALLOC_FAILURE); | |
159 | goto err; | |
160 | } | |
161 | ret->data = new_data; | |
162 | } | |
9cdf87f1 | 163 | |
0f113f3e MC |
164 | ret->length = BN_bn2bin(bn, ret->data); |
165 | return (ret); | |
166 | err: | |
167 | if (ret != ai) | |
168 | M_ASN1_ENUMERATED_free(ret); | |
169 | return (NULL); | |
170 | } | |
119f6288 | 171 | |
6b691a5c | 172 | BIGNUM *ASN1_ENUMERATED_to_BN(ASN1_ENUMERATED *ai, BIGNUM *bn) |
0f113f3e MC |
173 | { |
174 | BIGNUM *ret; | |
119f6288 | 175 | |
0f113f3e MC |
176 | if ((ret = BN_bin2bn(ai->data, ai->length, bn)) == NULL) |
177 | ASN1err(ASN1_F_ASN1_ENUMERATED_TO_BN, ASN1_R_BN_LIB); | |
178 | else if (ai->type == V_ASN1_NEG_ENUMERATED) | |
179 | BN_set_negative(ret, 1); | |
180 | return (ret); | |
181 | } |