LCOV - code coverage report
Current view: top level - lib/src - xstep.c (source / functions) Hit Total Coverage
Test: GNU SASL Lines: 18 20 90.0 %
Date: 2012-05-28 Functions: 2 2 100.0 %
Legend: Lines: hit not hit | Branches: + taken - not taken # not executed Branches: 10 12 83.3 %

           Branch data     Line data    Source code
       1                 :            : /* xstep.c --- Perform one SASL authentication step.
       2                 :            :  * Copyright (C) 2002-2012 Simon Josefsson
       3                 :            :  *
       4                 :            :  * This file is part of GNU SASL Library.
       5                 :            :  *
       6                 :            :  * GNU SASL Library is free software; you can redistribute it and/or
       7                 :            :  * modify it under the terms of the GNU Lesser General Public License
       8                 :            :  * as published by the Free Software Foundation; either version 2.1 of
       9                 :            :  * the License, or (at your option) any later version.
      10                 :            :  *
      11                 :            :  * GNU SASL Library is distributed in the hope that it will be useful,
      12                 :            :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      13                 :            :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      14                 :            :  * Lesser General Public License for more details.
      15                 :            :  *
      16                 :            :  * You should have received a copy of the GNU Lesser General Public
      17                 :            :  * License License along with GNU SASL Library; if not, write to the
      18                 :            :  * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
      19                 :            :  * Boston, MA 02110-1301, USA.
      20                 :            :  *
      21                 :            :  */
      22                 :            : 
      23                 :            : #include "internal.h"
      24                 :            : 
      25                 :            : /**
      26                 :            :  * gsasl_step:
      27                 :            :  * @sctx: libgsasl session handle.
      28                 :            :  * @input: input byte array.
      29                 :            :  * @input_len: size of input byte array.
      30                 :            :  * @output: newly allocated output byte array.
      31                 :            :  * @output_len: pointer to output variable with size of output byte array.
      32                 :            :  *
      33                 :            :  * Perform one step of SASL authentication.  This reads data from the
      34                 :            :  * other end (from @input and @input_len), processes it (potentially
      35                 :            :  * invoking callbacks to the application), and writes data to server
      36                 :            :  * (into newly allocated variable @output and @output_len that
      37                 :            :  * indicate the length of @output).
      38                 :            :  *
      39                 :            :  * The contents of the @output buffer is unspecified if this functions
      40                 :            :  * returns anything other than %GSASL_OK or %GSASL_NEEDS_MORE.  If
      41                 :            :  * this function return %GSASL_OK or %GSASL_NEEDS_MORE, however, the
      42                 :            :  * @output buffer is allocated by this function, and it is the
      43                 :            :  * responsibility of caller to deallocate it by calling free
      44                 :            :  * (@output).
      45                 :            :  *
      46                 :            :  * Return value: Returns %GSASL_OK if authenticated terminated
      47                 :            :  *   successfully, %GSASL_NEEDS_MORE if more data is needed, or error
      48                 :            :  *   code.
      49                 :            :  **/
      50                 :            : int
      51                 :        602 : gsasl_step (Gsasl_session * sctx,
      52                 :            :             const char *input, size_t input_len,
      53                 :            :             char **output, size_t * output_len)
      54                 :            : {
      55                 :            :   Gsasl_step_function step;
      56                 :            : 
      57         [ +  + ]:        602 :   if (sctx->clientp)
      58                 :        306 :     step = sctx->mech->client.step;
      59                 :            :   else
      60                 :        296 :     step = sctx->mech->server.step;
      61                 :            : 
      62                 :        602 :   return step (sctx, sctx->mech_data, input, input_len, output, output_len);
      63                 :            : }
      64                 :            : 
      65                 :            : /**
      66                 :            :  * gsasl_step64:
      67                 :            :  * @sctx: libgsasl client handle.
      68                 :            :  * @b64input: input base64 encoded byte array.
      69                 :            :  * @b64output: newly allocated output base64 encoded byte array.
      70                 :            :  *
      71                 :            :  * This is a simple wrapper around gsasl_step() that base64 decodes
      72                 :            :  * the input and base64 encodes the output.
      73                 :            :  *
      74                 :            :  * The contents of the @b64output buffer is unspecified if this
      75                 :            :  * functions returns anything other than %GSASL_OK or
      76                 :            :  * %GSASL_NEEDS_MORE.  If this function return %GSASL_OK or
      77                 :            :  * %GSASL_NEEDS_MORE, however, the @b64output buffer is allocated by
      78                 :            :  * this function, and it is the responsibility of caller to deallocate
      79                 :            :  * it by calling free (@b64output).
      80                 :            :  *
      81                 :            :  * Return value: Returns %GSASL_OK if authenticated terminated
      82                 :            :  *   successfully, %GSASL_NEEDS_MORE if more data is needed, or error
      83                 :            :  *   code.
      84                 :            :  **/
      85                 :            : int
      86                 :        118 : gsasl_step64 (Gsasl_session * sctx, const char *b64input, char **b64output)
      87                 :            : {
      88                 :        118 :   size_t input_len = 0, output_len = 0;
      89                 :        118 :   char *input = NULL, *output = NULL;
      90                 :            :   int res;
      91                 :            : 
      92         [ +  + ]:        118 :   if (b64input)
      93                 :            :     {
      94                 :        107 :       res = gsasl_base64_from (b64input, strlen (b64input),
      95                 :            :                                &input, &input_len);
      96         [ -  + ]:        107 :       if (res != GSASL_OK)
      97                 :          0 :         return GSASL_BASE64_ERROR;
      98                 :            :     }
      99                 :            : 
     100                 :        118 :   res = gsasl_step (sctx, input, input_len, &output, &output_len);
     101                 :            : 
     102                 :        118 :   free (input);
     103                 :            : 
     104 [ +  + ][ +  + ]:        118 :   if (res == GSASL_OK || res == GSASL_NEEDS_MORE)
     105                 :            :     {
     106                 :        108 :       int tmpres = gsasl_base64_to (output, output_len, b64output, NULL);
     107                 :            : 
     108                 :        108 :       free (output);
     109                 :            : 
     110         [ -  + ]:        108 :       if (tmpres != GSASL_OK)
     111                 :          0 :         return tmpres;
     112                 :            :     }
     113                 :            : 
     114                 :        118 :   return res;
     115                 :            : }

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