1 /* v3_utl.c */
2 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
3 * project 1999.
4 */
5 /* ====================================================================
6 * Copyright (c) 1999 The OpenSSL Project. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
18 * distribution.
19 *
20 * 3. All advertising materials mentioning features or use of this
21 * software must display the following acknowledgment:
22 * "This product includes software developed by the OpenSSL Project
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24 *
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 * endorse or promote products derived from this software without
27 * prior written permission. For written permission, please contact
28 * licensing@OpenSSL.org.
29 *
30 * 5. Products derived from this software may not be called "OpenSSL"
31 * nor may "OpenSSL" appear in their names without prior written
32 * permission of the OpenSSL Project.
33 *
34 * 6. Redistributions of any form whatsoever must retain the following
35 * acknowledgment:
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38 *
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
52 *
53 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com). This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
56 *
57 */
58
59 #include <stdio.h>
60 #include <ctype.h>
61 #include "cryptlib.h"
62 #include <openssl/conf.h>
63 #include <openssl/x509v3.h>
64
65 /* hex string utilities */
66
67 /* Given a buffer of length 'len' return a OPENSSL_malloc'ed string with its
68 * hex representation
69 * @@@ (Contents of buffer are always kept in ASCII, also on EBCDIC machines)
70 */
71
hex_to_string(unsigned char * buffer,long len)72 char *hex_to_string(unsigned char *buffer, long len)
73 {
74 char *tmp, *q;
75 unsigned char *p;
76 int i;
77 const static char hexdig[] = "0123456789ABCDEF";
78 if(!buffer || !len) return NULL;
79 if(!(tmp = OPENSSL_malloc(len * 3 + 1))) {
80 X509V3err(X509V3_F_HEX_TO_STRING,ERR_R_MALLOC_FAILURE);
81 return NULL;
82 }
83 q = tmp;
84 for(i = 0, p = buffer; i < len; i++,p++) {
85 *q++ = hexdig[(*p >> 4) & 0xf];
86 *q++ = hexdig[*p & 0xf];
87 *q++ = ':';
88 }
89 q[-1] = 0;
90 #ifdef CHARSET_EBCDIC
91 ebcdic2ascii(tmp, tmp, q - tmp - 1);
92 #endif
93
94 return tmp;
95 }
96
97 /* Give a string of hex digits convert to
98 * a buffer
99 */
100
string_to_hex(char * str,long * len)101 unsigned char *string_to_hex(char *str, long *len)
102 {
103 unsigned char *hexbuf, *q;
104 unsigned char ch, cl, *p;
105 if(!str) {
106 X509V3err(X509V3_F_STRING_TO_HEX,X509V3_R_INVALID_NULL_ARGUMENT);
107 return NULL;
108 }
109 if(!(hexbuf = OPENSSL_malloc(strlen(str) >> 1))) goto err;
110 for(p = (unsigned char *)str, q = hexbuf; *p;) {
111 ch = *p++;
112 #ifdef CHARSET_EBCDIC
113 ch = os_toebcdic[ch];
114 #endif
115 if(ch == ':') continue;
116 cl = *p++;
117 #ifdef CHARSET_EBCDIC
118 cl = os_toebcdic[cl];
119 #endif
120 if(!cl) {
121 X509V3err(X509V3_F_STRING_TO_HEX,X509V3_R_ODD_NUMBER_OF_DIGITS);
122 OPENSSL_free(hexbuf);
123 return NULL;
124 }
125 if(isupper(ch)) ch = tolower(ch);
126 if(isupper(cl)) cl = tolower(cl);
127
128 if((ch >= '0') && (ch <= '9')) ch -= '0';
129 else if ((ch >= 'a') && (ch <= 'f')) ch -= 'a' - 10;
130 else goto badhex;
131
132 if((cl >= '0') && (cl <= '9')) cl -= '0';
133 else if ((cl >= 'a') && (cl <= 'f')) cl -= 'a' - 10;
134 else goto badhex;
135
136 *q++ = (ch << 4) | cl;
137 }
138
139 if(len) *len = q - hexbuf;
140
141 return hexbuf;
142
143 err:
144 if(hexbuf) OPENSSL_free(hexbuf);
145 X509V3err(X509V3_F_STRING_TO_HEX,ERR_R_MALLOC_FAILURE);
146 return NULL;
147
148 badhex:
149 OPENSSL_free(hexbuf);
150 X509V3err(X509V3_F_STRING_TO_HEX,X509V3_R_ILLEGAL_HEX_DIGIT);
151 return NULL;
152
153 }
154