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       1                 :            : /* server.c --- EXTERNAL mechanism as defined in RFC 2222, server side.
       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 along with GNU SASL Library; if not, write to the Free
      18                 :            :  * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
      19                 :            :  * Boston, MA 02110-1301, USA.
      20                 :            :  *
      21                 :            :  */
      22                 :            : 
      23                 :            : #ifdef HAVE_CONFIG_H
      24                 :            : #include "config.h"
      25                 :            : #endif
      26                 :            : 
      27                 :            : /* Get specification. */
      28                 :            : #include "external.h"
      29                 :            : 
      30                 :            : /* Get memchr. */
      31                 :            : #include <string.h>
      32                 :            : 
      33                 :            : int
      34                 :         31 : _gsasl_external_server_step (Gsasl_session * sctx,
      35                 :            :                              void *mech_data,
      36                 :            :                              const char *input, size_t input_len,
      37                 :            :                              char **output, size_t * output_len)
      38                 :            : {
      39                 :         31 :   *output_len = 0;
      40                 :         31 :   *output = NULL;
      41                 :            : 
      42         [ +  + ]:         31 :   if (!input)
      43                 :         12 :     return GSASL_NEEDS_MORE;
      44                 :            : 
      45                 :            :   /* Quoting rfc2222bis-09:
      46                 :            :    * extern-resp       = *( UTF8-char-no-nul )
      47                 :            :    * UTF8-char-no-nul  = UTF8-1-no-nul / UTF8-2 / UTF8-3 / UTF8-4
      48                 :            :    * UTF8-1-no-nul     = %x01-7F */
      49         [ -  + ]:         19 :   if (memchr (input, '\0', input_len))
      50                 :          0 :     return GSASL_MECHANISM_PARSE_ERROR;
      51                 :            : 
      52                 :            :   /* FIXME: Validate that input is UTF-8. */
      53                 :            : 
      54         [ +  + ]:         19 :   if (input_len > 0)
      55                 :          4 :     gsasl_property_set_raw (sctx, GSASL_AUTHZID, input, input_len);
      56                 :            :   else
      57                 :         15 :     gsasl_property_set (sctx, GSASL_AUTHZID, NULL);
      58                 :            : 
      59                 :         31 :   return gsasl_callback (NULL, sctx, GSASL_VALIDATE_EXTERNAL);
      60                 :            : }