uuencode.c

   1 /* $OpenBSD: uuencode.c,v 1.22 2006/07/05 02:42:09 stevesk 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
  30 #include <netinet/in.h>
  31
  32 #include "xmalloc.h"
  33 #include "uuencode.h"
  34
  35 int
  36 uuencode(const u_char *src, u_int srclength,
  37     char *target, size_t targsize)
  38 {
  39         return __b64_ntop(src, srclength, target, targsize);
  40 }
  41
  42 int
  43 uudecode(const char *src, u_char *target, size_t targsize)
  44 {
  45         int len;
  46         char *encoded, *p;
  47
  48         /* copy the 'readonly' source */
  49         encoded = xstrdup(src);
  50         /* skip whitespace and data */
  51         for (p = encoded; *p == ' ' || *p == '\t'; p++)
  52                 ;
  53         for (; *p != '\0' && *p != ' ' && *p != '\t'; p++)
  54                 ;
  55         /* and remove trailing whitespace because __b64_pton needs this */
  56         *p = '\0';
  57         len = __b64_pton(encoded, target, targsize);
  58         xfree(encoded);
  59         return len;
  60 }
  61
  62 void
  63 dump_base64(FILE *fp, u_char *data, u_int len)
  64 {
  65         char *buf;
  66         int i, n;
  67
  68         if (len > 65536) {
  69                 fprintf(fp, "dump_base64: len > 65536\n");
  70                 return;
  71         }
  72         buf = xmalloc(2*len);
  73         n = uuencode(data, len, buf, 2*len);
  74         for (i = 0; i < n; i++) {
  75                 fprintf(fp, "%c", buf[i]);
  76                 if (i % 70 == 69)
  77                         fprintf(fp, "\n");
  78         }
  79         if (i % 70 != 69)
  80                 fprintf(fp, "\n");
  81         xfree(buf);
  82 }