2 * Copyright (c) 1995 - 1999 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
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23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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36 RCSID("$Id: base64.c,v 1.4 1999/12/02 16:58:45 joda Exp $");
42 static char base64[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
44 static int pos(char c)
47 for(p = base64; *p; p++)
53 int base64_encode(const void *data, int size, char **str)
58 const unsigned char *q;
60 p = s = (char*)malloc(size*4/3+4);
63 q = (const unsigned char*)data;
65 for(i = 0; i < size;){
75 p[0]=base64[(c&0x00fc0000) >> 18];
76 p[1]=base64[(c&0x0003f000) >> 12];
77 p[2]=base64[(c&0x00000fc0) >> 6];
78 p[3]=base64[(c&0x0000003f) >> 0];
90 int base64_decode(const char *str, void *data)
97 q=(unsigned char*)data;
98 for(p=str; *p && !done; p+=4){
138 *q++=(c&0x00ff0000)>>16;
141 *q++=(c&0x0000ff00)>>8;
143 *q++=(c&0x000000ff)>>0;
145 return q - (unsigned char*)data;