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/* $OpenBSD: uuencode.c,v 1.27 2013/05/17 00:13:14 djm Exp $ */
/*
* Copyright (c) 2000 Markus Friedl. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/types.h>
#include <netinet/in.h>
#include <resolv.h>
#include <stdio.h>
#include <stdlib.h>
#include "xmalloc.h"
#include "uuencode.h"
/*
* Encode binary 'src' of length 'srclength', writing base64-encoded text
* to 'target' of size 'targsize'. Will always nul-terminate 'target'.
* Returns the number of bytes stored in 'target' or -1 on error (inc.
* 'targsize' too small).
*/
int
uuencode(const u_char *src, u_int srclength,
char *target, size_t targsize)
{
return __b64_ntop(src, srclength, target, targsize);
}
/*
* Decode base64-encoded 'src' into buffer 'target' of 'targsize' bytes.
* Will skip leading and trailing whitespace. Returns the number of bytes
* stored in 'target' or -1 on error (inc. targsize too small).
*/
int
uudecode(const char *src, u_char *target, size_t targsize)
{
int len;
char *encoded, *p;
/* copy the 'readonly' source */
encoded = xstrdup(src);
/* skip whitespace and data */
for (p = encoded; *p == ' ' || *p == '\t'; p++)
;
for (; *p != '\0' && *p != ' ' && *p != '\t'; p++)
;
/* and remove trailing whitespace because __b64_pton needs this */
*p = '\0';
len = __b64_pton(encoded, target, targsize);
free(encoded);
return len;
}
void
dump_base64(FILE *fp, const u_char *data, u_int len)
{
char *buf;
int i, n;
if (len > 65536) {
fprintf(fp, "dump_base64: len > 65536\n");
return;
}
buf = xmalloc(2*len);
n = uuencode(data, len, buf, 2*len);
for (i = 0; i < n; i++) {
fprintf(fp, "%c", buf[i]);
if (i % 70 == 69)
fprintf(fp, "\n");
}
if (i % 70 != 69)
fprintf(fp, "\n");
free(buf);
}
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