2 * Copyright (c) 2004-2005 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the Institute nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
40 static const char hexchar[16] = "0123456789ABCDEF";
46 c = toupper((unsigned char)c);
47 for (p = hexchar; *p; p++)
53 ROKEN_LIB_FUNCTION ssize_t ROKEN_LIB_CALL
54 hex_encode(const void *data, size_t size, char **str)
56 const unsigned char *q = data;
60 /* check for overflow */
61 if (size * 2 < size) {
66 p = malloc(size * 2 + 1);
72 for (i = 0; i < size; i++) {
73 p[i * 2] = hexchar[(*q >> 4) & 0xf];
74 p[i * 2 + 1] = hexchar[*q & 0xf];
83 ROKEN_LIB_FUNCTION ssize_t ROKEN_LIB_CALL
84 hex_decode(const char *str, void *data, size_t len)
87 unsigned char *p = data;
92 /* check for overflow, same as (l+1)/2 but overflow safe */
93 if ((l/2) + (l&1) > len)
101 for (i = 0; i < l / 2; i++)
102 p[i] = pos(str[i * 2]) << 4 | pos(str[(i * 2) + 1]);