Branch data Line data Source code
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 : : #include <openssl/bn.h>
63 : :
64 : : /*
65 : : * Code for ENUMERATED type: identical to INTEGER apart from a different tag.
66 : : * for comments on encoding see a_int.c
67 : : */
68 : :
69 : 0 : int ASN1_ENUMERATED_set(ASN1_ENUMERATED *a, long v)
70 : : {
71 : : int j,k;
72 : : unsigned int i;
73 : : unsigned char buf[sizeof(long)+1];
74 : : long d;
75 : :
76 : 0 : a->type=V_ASN1_ENUMERATED;
77 [ # # ]: 0 : if (a->length < (int)(sizeof(long)+1))
78 : : {
79 [ # # ]: 0 : if (a->data != NULL)
80 : 0 : OPENSSL_free(a->data);
81 [ # # ]: 0 : if ((a->data=(unsigned char *)OPENSSL_malloc(sizeof(long)+1)) != NULL)
82 : 0 : memset((char *)a->data,0,sizeof(long)+1);
83 : : }
84 [ # # ]: 0 : if (a->data == NULL)
85 : : {
86 : 0 : ASN1err(ASN1_F_ASN1_ENUMERATED_SET,ERR_R_MALLOC_FAILURE);
87 : 0 : return(0);
88 : : }
89 : 0 : d=v;
90 [ # # ]: 0 : if (d < 0)
91 : : {
92 : 0 : d= -d;
93 : 0 : a->type=V_ASN1_NEG_ENUMERATED;
94 : : }
95 : :
96 [ # # ]: 0 : for (i=0; i<sizeof(long); i++)
97 : : {
98 [ # # ]: 0 : if (d == 0) break;
99 : 0 : buf[i]=(int)d&0xff;
100 : 0 : d>>=8;
101 : : }
102 : 0 : j=0;
103 [ # # ]: 0 : for (k=i-1; k >=0; k--)
104 : 0 : a->data[j++]=buf[k];
105 : 0 : a->length=j;
106 : 0 : return(1);
107 : : }
108 : :
109 : 54 : long ASN1_ENUMERATED_get(ASN1_ENUMERATED *a)
110 : : {
111 : 54 : int neg=0,i;
112 : 54 : long r=0;
113 : :
114 [ + - ]: 54 : if (a == NULL) return(0L);
115 : 54 : i=a->type;
116 [ + - ]: 54 : if (i == V_ASN1_NEG_ENUMERATED)
117 : : neg=1;
118 [ + - ]: 54 : else if (i != V_ASN1_ENUMERATED)
119 : : return -1;
120 : :
121 [ + - ]: 54 : if (a->length > (int)sizeof(long))
122 : : {
123 : : /* hmm... a bit ugly */
124 : : return(0xffffffffL);
125 : : }
126 [ + - ]: 54 : if (a->data == NULL)
127 : : return 0;
128 : :
129 [ + + ]: 108 : for (i=0; i<a->length; i++)
130 : : {
131 : 54 : r<<=8;
132 : 54 : r|=(unsigned char)a->data[i];
133 : : }
134 [ - + ]: 54 : if (neg) r= -r;
135 : 54 : return(r);
136 : : }
137 : :
138 : 0 : ASN1_ENUMERATED *BN_to_ASN1_ENUMERATED(BIGNUM *bn, ASN1_ENUMERATED *ai)
139 : : {
140 : : ASN1_ENUMERATED *ret;
141 : : int len,j;
142 : :
143 [ # # ]: 0 : if (ai == NULL)
144 : 0 : ret=M_ASN1_ENUMERATED_new();
145 : : else
146 : : ret=ai;
147 [ # # ]: 0 : if (ret == NULL)
148 : : {
149 : 0 : ASN1err(ASN1_F_BN_TO_ASN1_ENUMERATED,ERR_R_NESTED_ASN1_ERROR);
150 : 0 : goto err;
151 : : }
152 [ # # ]: 0 : if(BN_is_negative(bn)) ret->type = V_ASN1_NEG_ENUMERATED;
153 : 0 : else ret->type=V_ASN1_ENUMERATED;
154 : 0 : j=BN_num_bits(bn);
155 [ # # ]: 0 : len=((j == 0)?0:((j/8)+1));
156 [ # # ]: 0 : if (ret->length < len+4)
157 : : {
158 : 0 : unsigned char *new_data=OPENSSL_realloc(ret->data, len+4);
159 [ # # ]: 0 : if (!new_data)
160 : : {
161 : 0 : ASN1err(ASN1_F_BN_TO_ASN1_ENUMERATED,ERR_R_MALLOC_FAILURE);
162 : 0 : goto err;
163 : : }
164 : 0 : ret->data=new_data;
165 : : }
166 : :
167 : 0 : ret->length=BN_bn2bin(bn,ret->data);
168 : 0 : return(ret);
169 : : err:
170 [ # # ]: 0 : if (ret != ai) M_ASN1_ENUMERATED_free(ret);
171 : : return(NULL);
172 : : }
173 : :
174 : 0 : BIGNUM *ASN1_ENUMERATED_to_BN(ASN1_ENUMERATED *ai, BIGNUM *bn)
175 : : {
176 : : BIGNUM *ret;
177 : :
178 [ # # ]: 0 : if ((ret=BN_bin2bn(ai->data,ai->length,bn)) == NULL)
179 : 0 : ASN1err(ASN1_F_ASN1_ENUMERATED_TO_BN,ASN1_R_BN_LIB);
180 [ # # ]: 0 : else if(ai->type == V_ASN1_NEG_ENUMERATED) BN_set_negative(ret,1);
181 : 0 : return(ret);
182 : : }
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