uuencode.c

   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
  36 int
  37 uuencode(const u_char *src, u_int srclength,
  38     char *target, size_t targsize)
  39 {
  40         return __b64_ntop(src, srclength, target, targsize);
  41 }
  42
  43 int
  44 uudecode(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
  63 void
  64 dump_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 }