uuencode.c

   1 /* $OpenBSD: uuencode.c,v 1.23 2006/08/01 23:22:48 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 <resolv.h>
  33 #include <stdio.h>
  34
  35 #include "xmalloc.h"
  36 #include "uuencode.h"
  37
  38 int
  39 uuencode(const u_char *src, u_int srclength,
  40     char *target, size_t targsize)
  41 {
  42         return __b64_ntop(src, srclength, target, targsize);
  43 }
  44
  45 int
  46 uudecode(const char *src, u_char *target, size_t targsize)
  47 {
  48         int len;
  49         char *encoded, *p;
  50
  51         /* copy the 'readonly' source */
  52         encoded = xstrdup(src);
  53         /* skip whitespace and data */
  54         for (p = encoded; *p == ' ' || *p == '\t'; p++)
  55                 ;
  56         for (; *p != '\0' && *p != ' ' && *p != '\t'; p++)
  57                 ;
  58         /* and remove trailing whitespace because __b64_pton needs this */
  59         *p = '\0';
  60         len = __b64_pton(encoded, target, targsize);
  61         xfree(encoded);
  62         return len;
  63 }
  64
  65 void
  66 dump_base64(FILE *fp, u_char *data, u_int len)
  67 {
  68         char *buf;
  69         int i, n;
  70
  71         if (len > 65536) {
  72                 fprintf(fp, "dump_base64: len > 65536\n");
  73                 return;
  74         }
  75         buf = xmalloc(2*len);
  76         n = uuencode(data, len, buf, 2*len);
  77         for (i = 0; i < n; i++) {
  78                 fprintf(fp, "%c", buf[i]);
  79                 if (i % 70 == 69)
  80                         fprintf(fp, "\n");
  81         }
  82         if (i % 70 != 69)
  83                 fprintf(fp, "\n");
  84         xfree(buf);
  85 }