1 /* crypto/asn1/f_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/buffer.h>
62 #include <openssl/asn1.h>
63
64 /* Based on a_int.c: equivalent ENUMERATED functions */
65
66 int i2a_ASN1_ENUMERATED(BIO *bp, ASN1_ENUMERATED *a)
67 {
68 int i,n=0;
69 static const char *h="0123456789ABCDEF";
70 char buf[2];
71
72 if (a == NULL) return(0);
73
74 if (a->length == 0)
75 {
76 if (BIO_write(bp,"00",2) != 2) goto err;
77 n=2;
78 }
79 else
80 {
81 for (i=0; i<a->length; i++)
82 {
83 if ((i != 0) && (i%35 == 0))
84 {
85 if (BIO_write(bp,"\\\n",2) != 2) goto err;
86 n+=2;
87 }
88 buf[0]=h[((unsigned char)a->data[i]>>4)&0x0f];
89 buf[1]=h[((unsigned char)a->data[i] )&0x0f];
90 if (BIO_write(bp,buf,2) != 2) goto err;
91 n+=2;
92 }
93 }
94 return(n);
95 err:
96 return(-1);
97 }
98
99 int a2i_ASN1_ENUMERATED(BIO *bp, ASN1_ENUMERATED *bs, char *buf, int size)
100 {
101 int ret=0;
102 int i,j,k,m,n,again,bufsize;
103 unsigned char *s=NULL,*sp;
104 unsigned char *bufp;
105 int num=0,slen=0,first=1;
106
107 bs->type=V_ASN1_ENUMERATED;
108
109 bufsize=BIO_gets(bp,buf,size);
110 for (;;)
111 {
112 if (bufsize < 1) goto err_sl;
113 i=bufsize;
114 if (buf[i-1] == '\n') buf[--i]='\0';
115 if (i == 0) goto err_sl;
116 if (buf[i-1] == '\r') buf[--i]='\0';
117 if (i == 0) goto err_sl;
118 again=(buf[i-1] == '\\');
119
120 for (j=0; j<i; j++)
121 {
122 if (!( ((buf[j] >= '0') && (buf[j] <= '9')) ||
123 ((buf[j] >= 'a') && (buf[j] <= 'f')) ||
124 ((buf[j] >= 'A') && (buf[j] <= 'F'))))
125 {
126 i=j;
127 break;
128 }
129 }
130 buf[i]='\0';
131 /* We have now cleared all the crap off the end of the
132 * line */
133 if (i < 2) goto err_sl;
134
135 bufp=(unsigned char *)buf;
136 if (first)
137 {
138 first=0;
139 if ((bufp[0] == '0') && (buf[1] == '0'))
140 {
141 bufp+=2;
142 i-=2;
143 }
144 }
145 k=0;
146 i-=again;
147 if (i%2 != 0)
148 {
149 ASN1err(ASN1_F_A2I_ASN1_ENUMERATED,ASN1_R_ODD_NUMBER_OF_CHARS);
150 goto err;
151 }
152 i/=2;
153 if (num+i > slen)
154 {
155 if (s == NULL)
156 sp=(unsigned char *)OPENSSL_malloc(
157 (unsigned int)num+i*2);
158 else
159 sp=(unsigned char *)OPENSSL_realloc(s,
160 (unsigned int)num+i*2);
161 if (sp == NULL)
162 {
163 ASN1err(ASN1_F_A2I_ASN1_ENUMERATED,ERR_R_MALLOC_FAILURE);
164 if (s != NULL) OPENSSL_free(s);
165 goto err;
166 }
167 s=sp;
168 slen=num+i*2;
169 }
170 for (j=0; j<i; j++,k+=2)
171 {
172 for (n=0; n<2; n++)
173 {
174 m=bufp[k+n];
175 if ((m >= '0') && (m <= '9'))
176 m-='0';
177 else if ((m >= 'a') && (m <= 'f'))
178 m=m-'a'+10;
179 else if ((m >= 'A') && (m <= 'F'))
180 m=m-'A'+10;
181 else
182 {
183 ASN1err(ASN1_F_A2I_ASN1_ENUMERATED,ASN1_R_NON_HEX_CHARACTERS);
184 goto err;
185 }
186 s[num+j]<<=4;
187 s[num+j]|=m;
188 }
189 }
190 num+=i;
191 if (again)
192 bufsize=BIO_gets(bp,buf,size);
193 else
194 break;
195 }
196 bs->length=num;
197 bs->data=s;
198 ret=1;
199 err:
200 if (0)
201 {
202 err_sl:
203 ASN1err(ASN1_F_A2I_ASN1_ENUMERATED,ASN1_R_SHORT_LINE);
204 }
205 return(ret);
206 }
207