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447e387872
[uuencode.c]
document what these functions do so I don't ever have to recuse into
b64_pton/ntop to remember their return values
95 lines
2.9 KiB
C
95 lines
2.9 KiB
C
/* $OpenBSD: uuencode.c,v 1.25 2009/03/05 11:30:50 djm Exp $ */
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/*
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* Copyright (c) 2000 Markus Friedl. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "includes.h"
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#include <sys/types.h>
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#include <netinet/in.h>
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#include <resolv.h>
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#include <stdio.h>
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#include "xmalloc.h"
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#include "uuencode.h"
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/*
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* Encode binary 'src' of length 'srclength', writing base64-encoded text
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* to 'target' of size 'targsize'. Will always nul-terminate 'target'.
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* Returns the number of bytes stored in 'target' or -1 on error (inc.
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* 'targsize' too small).
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*/
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int
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uuencode(const u_char *src, u_int srclength,
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char *target, size_t targsize)
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{
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return __b64_ntop(src, srclength, target, targsize);
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}
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/*
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* Decode base64-encoded 'src' into buffer 'target' of 'targsize' bytes.
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* Will skip leading and trailing whitespace. Returns the number of bytes
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* stored in 'target' or -1 on error (inc. targsize too small).
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*/
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int
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uudecode(const char *src, u_char *target, size_t targsize)
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{
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int len;
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char *encoded, *p;
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/* copy the 'readonly' source */
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encoded = xstrdup(src);
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/* skip whitespace and data */
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for (p = encoded; *p == ' ' || *p == '\t'; p++)
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;
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for (; *p != '\0' && *p != ' ' && *p != '\t'; p++)
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;
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/* and remove trailing whitespace because __b64_pton needs this */
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*p = '\0';
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len = __b64_pton(encoded, target, targsize);
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xfree(encoded);
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return len;
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}
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void
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dump_base64(FILE *fp, u_char *data, u_int len)
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{
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char *buf;
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int i, n;
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if (len > 65536) {
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fprintf(fp, "dump_base64: len > 65536\n");
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return;
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}
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buf = xmalloc(2*len);
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n = uuencode(data, len, buf, 2*len);
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for (i = 0; i < n; i++) {
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fprintf(fp, "%c", buf[i]);
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if (i % 70 == 69)
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fprintf(fp, "\n");
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}
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if (i % 70 != 69)
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fprintf(fp, "\n");
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xfree(buf);
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}
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