2 * Copyright (c) 1995, 1996, 1997 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. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed by the Kungliga Tekniska
20 * Högskolan and its contributors.
22 * 4. Neither the name of the Institute nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
24 * without specific prior written permission.
26 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
41 RCSID("$Id: base64.c,v 1.6 1997/05/30 17:24:06 assar Exp $");
47 static char base64[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
49 static int pos(char c)
52 for(p = base64; *p; p++)
58 int base64_encode(const void *data, int size, char **str)
65 p = s = (char*)malloc(size*4/3+4);
66 q = (unsigned char*)data;
68 for(i = 0; i < size;){
78 p[0]=base64[(c&0x00fc0000) >> 18];
79 p[1]=base64[(c&0x0003f000) >> 12];
80 p[2]=base64[(c&0x00000fc0) >> 6];
81 p[3]=base64[(c&0x0000003f) >> 0];
93 int base64_decode(const char *str, void *data)
100 q=(unsigned char*)data;
101 for(p=str; *p && !done; p+=4){
141 *q++=(c&0x00ff0000)>>16;
144 *q++=(c&0x0000ff00)>>8;
146 *q++=(c&0x000000ff)>>0;
148 return q - (unsigned char*)data;