uuencode.c revision 162852 
1/* $OpenBSD: uuencode.c,v 1.24 2006/08/03 03:34:42 deraadt Exp $ */
2/*
3 * Copyright (c) 2000 Markus Friedl.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "includes.h"
27
28#include <sys/types.h>
29#include <netinet/in.h>
30#include <resolv.h>
31#include <stdio.h>
32
33#include "xmalloc.h"
34#include "uuencode.h"
35
36int
37uuencode(const u_char *src, u_int srclength,
38    char *target, size_t targsize)
39{
40	return __b64_ntop(src, srclength, target, targsize);
41}
42
43int
44uudecode(const char *src, u_char *target, size_t targsize)
45{
46	int len;
47	char *encoded, *p;
48
49	/* copy the 'readonly' source */
50	encoded = xstrdup(src);
51	/* skip whitespace and data */
52	for (p = encoded; *p == ' ' || *p == '\t'; p++)
53		;
54	for (; *p != '\0' && *p != ' ' && *p != '\t'; p++)
55		;
56	/* and remove trailing whitespace because __b64_pton needs this */
57	*p = '\0';
58	len = __b64_pton(encoded, target, targsize);
59	xfree(encoded);
60	return len;
61}
62
63void
64dump_base64(FILE *fp, u_char *data, u_int len)
65{
66	char *buf;
67	int i, n;
68
69	if (len > 65536) {
70		fprintf(fp, "dump_base64: len > 65536\n");
71		return;
72	}
73	buf = xmalloc(2*len);
74	n = uuencode(data, len, buf, 2*len);
75	for (i = 0; i < n; i++) {
76		fprintf(fp, "%c", buf[i]);
77		if (i % 70 == 69)
78			fprintf(fp, "\n");
79	}
80	if (i % 70 != 69)
81		fprintf(fp, "\n");
82	xfree(buf);
83}
84