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       1                 :            : /* $OpenBSD: uuencode.c,v 1.27 2013/05/17 00:13:14 djm 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                 :            : #include <stdlib.h>
      33                 :            : 
      34                 :            : #include "xmalloc.h"
      35                 :            : #include "uuencode.h"
      36                 :            : 
      37                 :            : /*
      38                 :            :  * Encode binary 'src' of length 'srclength', writing base64-encoded text
      39                 :            :  * to 'target' of size 'targsize'. Will always nul-terminate 'target'.
      40                 :            :  * Returns the number of bytes stored in 'target' or -1 on error (inc.
      41                 :            :  * 'targsize' too small).
      42                 :            :  */
      43                 :            : int
      44                 :        165 : uuencode(const u_char *src, u_int srclength,
      45                 :            :     char *target, size_t targsize)
      46                 :            : {
      47                 :        165 :         return __b64_ntop(src, srclength, target, targsize);
      48                 :            : }
      49                 :            : 
      50                 :            : /*
      51                 :            :  * Decode base64-encoded 'src' into buffer 'target' of 'targsize' bytes.
      52                 :            :  * Will skip leading and trailing whitespace. Returns the number of bytes
      53                 :            :  * stored in 'target' or -1 on error (inc. targsize too small).
      54                 :            :  */
      55                 :            : int
      56                 :       9172 : uudecode(const char *src, u_char *target, size_t targsize)
      57                 :            : {
      58                 :            :         int len;
      59                 :            :         char *encoded, *p;
      60                 :            : 
      61                 :            :         /* copy the 'readonly' source */
      62                 :       9172 :         encoded = xstrdup(src);
      63                 :            :         /* skip whitespace and data */
      64         [ -  + ]:       9172 :         for (p = encoded; *p == ' ' || *p == '\t'; p++)
      65                 :            :                 ;
      66 [ +  + ][ +  - ]:    3702715 :         for (; *p != '\0' && *p != ' ' && *p != '\t'; p++)
      67                 :            :                 ;
      68                 :            :         /* and remove trailing whitespace because __b64_pton needs this */
      69                 :       9172 :         *p = '\0';
      70                 :       9172 :         len = __b64_pton(encoded, target, targsize);
      71                 :       9172 :         free(encoded);
      72                 :       9172 :         return len;
      73                 :            : }
      74                 :            : 
      75                 :            : void
      76                 :          5 : dump_base64(FILE *fp, const u_char *data, u_int len)
      77                 :            : {
      78                 :            :         char *buf;
      79                 :            :         int i, n;
      80                 :            : 
      81         [ -  + ]:          5 :         if (len > 65536) {
      82                 :            :                 fprintf(fp, "dump_base64: len > 65536\n");
      83                 :          5 :                 return;
      84                 :            :         }
      85                 :          5 :         buf = xmalloc(2*len);
      86                 :         10 :         n = uuencode(data, len, buf, 2*len);
      87         [ +  + ]:       2113 :         for (i = 0; i < n; i++) {
      88                 :       2108 :                 fprintf(fp, "%c", buf[i]);
      89         [ +  + ]:       2108 :                 if (i % 70 == 69)
      90                 :            :                         fprintf(fp, "\n");
      91                 :            :         }
      92         [ +  - ]:          5 :         if (i % 70 != 69)
      93                 :            :                 fprintf(fp, "\n");
      94                 :          5 :         free(buf);
      95                 :            : }