1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
2 * All rights reserved.
3 *
4 * This package is an SSL implementation written
5 * by Eric Young (eay@cryptsoft.com).
6 * The implementation was written so as to conform with Netscapes SSL.
7 *
8 * This library is free for commercial and non-commercial use as long as
9 * the following conditions are aheared to. The following conditions
10 * apply to all code found in this distribution, be it the RC4, RSA,
11 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
12 * included with this distribution is covered by the same copyright terms
13 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
14 *
15 * Copyright remains Eric Young's, and as such any Copyright notices in
16 * the code are not to be removed.
17 * If this package is used in a product, Eric Young should be given attribution
18 * as the author of the parts of the library used.
19 * This can be in the form of a textual message at program startup or
20 * in documentation (online or textual) provided with the package.
21 *
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
24 * are met:
25 * 1. Redistributions of source code must retain the copyright
26 * notice, this list of conditions and the following disclaimer.
27 * 2. Redistributions in binary form must reproduce the above copyright
28 * notice, this list of conditions and the following disclaimer in the
29 * documentation and/or other materials provided with the distribution.
30 * 3. All advertising materials mentioning features or use of this software
31 * must display the following acknowledgement:
32 * "This product includes cryptographic software written by
33 * Eric Young (eay@cryptsoft.com)"
34 * The word 'cryptographic' can be left out if the rouines from the library
35 * being used are not cryptographic related :-).
36 * 4. If you include any Windows specific code (or a derivative thereof) from
37 * the apps directory (application code) you must include an acknowledgement:
38 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
39 *
40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
50 * SUCH DAMAGE.
51 *
52 * The licence and distribution terms for any publically available version or
53 * derivative of this code cannot be changed. i.e. this code cannot simply be
54 * copied and put under another distribution licence
55 * [including the GNU Public Licence.] */
56
57 #include <openssl/asn1.h>
58
59 #include <string.h>
60
61 #include <openssl/err.h>
62 #include <openssl/mem.h>
63
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
ASN1_ENUMERATED_set(ASN1_ENUMERATED * a,long v)70 int ASN1_ENUMERATED_set(ASN1_ENUMERATED *a, long v)
71 {
72 int j,k;
73 unsigned int i;
74 unsigned char buf[sizeof(long)+1];
75 long d;
76
77 a->type=V_ASN1_ENUMERATED;
78 if (a->length < (int)(sizeof(long)+1))
79 {
80 if (a->data != NULL)
81 OPENSSL_free(a->data);
82 if ((a->data=(unsigned char *)OPENSSL_malloc(sizeof(long)+1)) != NULL)
83 memset((char *)a->data,0,sizeof(long)+1);
84 }
85 if (a->data == NULL)
86 {
87 OPENSSL_PUT_ERROR(ASN1, ASN1_ENUMERATED_set, ERR_R_MALLOC_FAILURE);
88 return(0);
89 }
90 d=v;
91 if (d < 0)
92 {
93 d= -d;
94 a->type=V_ASN1_NEG_ENUMERATED;
95 }
96
97 for (i=0; i<sizeof(long); i++)
98 {
99 if (d == 0) break;
100 buf[i]=(int)d&0xff;
101 d>>=8;
102 }
103 j=0;
104 for (k=i-1; k >=0; k--)
105 a->data[j++]=buf[k];
106 a->length=j;
107 return(1);
108 }
109
ASN1_ENUMERATED_get(ASN1_ENUMERATED * a)110 long ASN1_ENUMERATED_get(ASN1_ENUMERATED *a)
111 {
112 int neg=0,i;
113 long r=0;
114
115 if (a == NULL) return(0L);
116 i=a->type;
117 if (i == V_ASN1_NEG_ENUMERATED)
118 neg=1;
119 else if (i != V_ASN1_ENUMERATED)
120 return -1;
121
122 if (a->length > (int)sizeof(long))
123 {
124 /* hmm... a bit ugly */
125 return(0xffffffffL);
126 }
127 if (a->data == NULL)
128 return 0;
129
130 for (i=0; i<a->length; i++)
131 {
132 r<<=8;
133 r|=(unsigned char)a->data[i];
134 }
135 if (neg) r= -r;
136 return(r);
137 }
138
BN_to_ASN1_ENUMERATED(BIGNUM * bn,ASN1_ENUMERATED * ai)139 ASN1_ENUMERATED *BN_to_ASN1_ENUMERATED(BIGNUM *bn, ASN1_ENUMERATED *ai)
140 {
141 ASN1_ENUMERATED *ret;
142 int len,j;
143
144 if (ai == NULL)
145 ret=M_ASN1_ENUMERATED_new();
146 else
147 ret=ai;
148 if (ret == NULL)
149 {
150 OPENSSL_PUT_ERROR(ASN1, BN_to_ASN1_ENUMERATED, ASN1_R_NESTED_ASN1_ERROR);
151 goto err;
152 }
153 if(BN_is_negative(bn)) ret->type = V_ASN1_NEG_ENUMERATED;
154 else ret->type=V_ASN1_ENUMERATED;
155 j=BN_num_bits(bn);
156 len=((j == 0)?0:((j/8)+1));
157 if (ret->length < len+4)
158 {
159 unsigned char *new_data=OPENSSL_realloc(ret->data, len+4);
160 if (!new_data)
161 {
162 OPENSSL_PUT_ERROR(ASN1, BN_to_ASN1_ENUMERATED, ERR_R_MALLOC_FAILURE);
163 goto err;
164 }
165 ret->data=new_data;
166 }
167
168 ret->length=BN_bn2bin(bn,ret->data);
169 return(ret);
170 err:
171 if (ret != ai) M_ASN1_ENUMERATED_free(ret);
172 return(NULL);
173 }
174
ASN1_ENUMERATED_to_BN(ASN1_ENUMERATED * ai,BIGNUM * bn)175 BIGNUM *ASN1_ENUMERATED_to_BN(ASN1_ENUMERATED *ai, BIGNUM *bn)
176 {
177 BIGNUM *ret;
178
179 if ((ret=BN_bin2bn(ai->data,ai->length,bn)) == NULL)
180 OPENSSL_PUT_ERROR(ASN1, ASN1_ENUMERATED_to_BN, ASN1_R_BN_LIB);
181 else if(ai->type == V_ASN1_NEG_ENUMERATED) BN_set_negative(ret,1);
182 return(ret);
183 }
184