LCOV - code coverage report
Current view: top level - lib/roken - base64.c (source / functions) Hit Total Coverage
Test: samba_4_0_test.lcov.info Lines: 0 64 0.0 %
Date: 2014-04-02 Functions: 0 4 0.0 %
Branches: 0 42 0.0 %

           Branch data     Line data    Source code
       1                 :            : /*
       2                 :            :  * Copyright (c) 1995-2001 Kungliga Tekniska Högskolan
       3                 :            :  * (Royal Institute of Technology, Stockholm, Sweden).
       4                 :            :  * All rights reserved.
       5                 :            :  *
       6                 :            :  * Redistribution and use in source and binary forms, with or without
       7                 :            :  * modification, are permitted provided that the following conditions
       8                 :            :  * are met:
       9                 :            :  *
      10                 :            :  * 1. Redistributions of source code must retain the above copyright
      11                 :            :  *    notice, this list of conditions and the following disclaimer.
      12                 :            :  *
      13                 :            :  * 2. Redistributions in binary form must reproduce the above copyright
      14                 :            :  *    notice, this list of conditions and the following disclaimer in the
      15                 :            :  *    documentation and/or other materials provided with the distribution.
      16                 :            :  *
      17                 :            :  * 3. Neither the name of the Institute nor the names of its contributors
      18                 :            :  *    may be used to endorse or promote products derived from this software
      19                 :            :  *    without specific prior written permission.
      20                 :            :  *
      21                 :            :  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
      22                 :            :  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
      23                 :            :  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
      24                 :            :  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
      25                 :            :  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
      26                 :            :  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
      27                 :            :  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
      28                 :            :  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
      29                 :            :  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
      30                 :            :  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
      31                 :            :  * SUCH DAMAGE.
      32                 :            :  */
      33                 :            : 
      34                 :            : #include <config.h>
      35                 :            : 
      36                 :            : #include <stdlib.h>
      37                 :            : #include <string.h>
      38                 :            : #include <limits.h>
      39                 :            : #include "base64.h"
      40                 :            : 
      41                 :            : static const char base64_chars[] =
      42                 :            :     "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
      43                 :            : 
      44                 :            : static int
      45                 :          0 : pos(char c)
      46                 :            : {
      47                 :            :     const char *p;
      48         [ #  # ]:          0 :     for (p = base64_chars; *p; p++)
      49         [ #  # ]:          0 :         if (*p == c)
      50                 :          0 :             return p - base64_chars;
      51                 :          0 :     return -1;
      52                 :            : }
      53                 :            : 
      54                 :            : ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL
      55                 :          0 : base64_encode(const void *data, int size, char **str)
      56                 :            : {
      57                 :            :     char *s, *p;
      58                 :            :     int i;
      59                 :            :     int c;
      60                 :            :     const unsigned char *q;
      61                 :            : 
      62 [ #  # ][ #  # ]:          0 :     if (size > INT_MAX/4 || size < 0) {
      63                 :          0 :         *str = NULL;
      64                 :          0 :         return -1;
      65                 :            :     }
      66                 :            : 
      67                 :          0 :     p = s = (char *) malloc(size * 4 / 3 + 4);
      68         [ #  # ]:          0 :     if (p == NULL) {
      69                 :          0 :         *str = NULL;
      70                 :          0 :         return -1;
      71                 :            :     }
      72                 :          0 :     q = (const unsigned char *) data;
      73                 :            : 
      74         [ #  # ]:          0 :     for (i = 0; i < size;) {
      75                 :          0 :         c = q[i++];
      76                 :          0 :         c *= 256;
      77         [ #  # ]:          0 :         if (i < size)
      78                 :          0 :             c += q[i];
      79                 :          0 :         i++;
      80                 :          0 :         c *= 256;
      81         [ #  # ]:          0 :         if (i < size)
      82                 :          0 :             c += q[i];
      83                 :          0 :         i++;
      84                 :          0 :         p[0] = base64_chars[(c & 0x00fc0000) >> 18];
      85                 :          0 :         p[1] = base64_chars[(c & 0x0003f000) >> 12];
      86                 :          0 :         p[2] = base64_chars[(c & 0x00000fc0) >> 6];
      87                 :          0 :         p[3] = base64_chars[(c & 0x0000003f) >> 0];
      88         [ #  # ]:          0 :         if (i > size)
      89                 :          0 :             p[3] = '=';
      90         [ #  # ]:          0 :         if (i > size + 1)
      91                 :          0 :             p[2] = '=';
      92                 :          0 :         p += 4;
      93                 :            :     }
      94                 :          0 :     *p = 0;
      95                 :          0 :     *str = s;
      96                 :          0 :     return (int) strlen(s);
      97                 :            : }
      98                 :            : 
      99                 :            : #define DECODE_ERROR 0xffffffff
     100                 :            : 
     101                 :            : static unsigned int
     102                 :          0 : token_decode(const char *token)
     103                 :            : {
     104                 :            :     int i;
     105                 :          0 :     unsigned int val = 0;
     106                 :          0 :     int marker = 0;
     107         [ #  # ]:          0 :     if (strlen(token) < 4)
     108                 :          0 :         return DECODE_ERROR;
     109         [ #  # ]:          0 :     for (i = 0; i < 4; i++) {
     110                 :          0 :         val *= 64;
     111         [ #  # ]:          0 :         if (token[i] == '=')
     112                 :          0 :             marker++;
     113         [ #  # ]:          0 :         else if (marker > 0)
     114                 :          0 :             return DECODE_ERROR;
     115                 :            :         else
     116                 :          0 :             val += pos(token[i]);
     117                 :            :     }
     118         [ #  # ]:          0 :     if (marker > 2)
     119                 :          0 :         return DECODE_ERROR;
     120                 :          0 :     return (marker << 24) | val;
     121                 :            : }
     122                 :            : 
     123                 :            : ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL
     124                 :          0 : base64_decode(const char *str, void *data)
     125                 :            : {
     126                 :            :     const char *p;
     127                 :            :     unsigned char *q;
     128                 :            : 
     129                 :          0 :     q = data;
     130 [ #  # ][ #  # ]:          0 :     for (p = str; *p && (*p == '=' || strchr(base64_chars, *p)); p += 4) {
                 [ #  # ]
     131                 :          0 :         unsigned int val = token_decode(p);
     132                 :          0 :         unsigned int marker = (val >> 24) & 0xff;
     133         [ #  # ]:          0 :         if (val == DECODE_ERROR)
     134                 :          0 :             return -1;
     135                 :          0 :         *q++ = (val >> 16) & 0xff;
     136         [ #  # ]:          0 :         if (marker < 2)
     137                 :          0 :             *q++ = (val >> 8) & 0xff;
     138         [ #  # ]:          0 :         if (marker < 1)
     139                 :          0 :             *q++ = val & 0xff;
     140                 :            :     }
     141                 :          0 :     return q - (unsigned char *) data;
     142                 :            : }

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