gsasl  1.8.0
external/server.c
Go to the documentation of this file.
00001 /* server.c --- EXTERNAL mechanism as defined in RFC 2222, server side.
00002  * Copyright (C) 2002-2012 Simon Josefsson
00003  *
00004  * This file is part of GNU SASL Library.
00005  *
00006  * GNU SASL Library is free software; you can redistribute it and/or
00007  * modify it under the terms of the GNU Lesser General Public License
00008  * as published by the Free Software Foundation; either version 2.1 of
00009  * the License, or (at your option) any later version.
00010  *
00011  * GNU SASL Library is distributed in the hope that it will be useful,
00012  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00013  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014  * Lesser General Public License for more details.
00015  *
00016  * You should have received a copy of the GNU Lesser General Public
00017  * License along with GNU SASL Library; if not, write to the Free
00018  * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
00019  * Boston, MA 02110-1301, USA.
00020  *
00021  */
00022 
00023 #ifdef HAVE_CONFIG_H
00024 #include "config.h"
00025 #endif
00026 
00027 /* Get specification. */
00028 #include "external.h"
00029 
00030 /* Get memchr. */
00031 #include <string.h>
00032 
00033 int
00034 _gsasl_external_server_step (Gsasl_session * sctx,
00035                              void *mech_data,
00036                              const char *input, size_t input_len,
00037                              char **output, size_t * output_len)
00038 {
00039   *output_len = 0;
00040   *output = NULL;
00041 
00042   if (!input)
00043     return GSASL_NEEDS_MORE;
00044 
00045   /* Quoting rfc2222bis-09:
00046    * extern-resp       = *( UTF8-char-no-nul )
00047    * UTF8-char-no-nul  = UTF8-1-no-nul / UTF8-2 / UTF8-3 / UTF8-4
00048    * UTF8-1-no-nul     = %x01-7F */
00049   if (memchr (input, '\0', input_len))
00050     return GSASL_MECHANISM_PARSE_ERROR;
00051 
00052   /* FIXME: Validate that input is UTF-8. */
00053 
00054   if (input_len > 0)
00055     gsasl_property_set_raw (sctx, GSASL_AUTHZID, input, input_len);
00056   else
00057     gsasl_property_set (sctx, GSASL_AUTHZID, NULL);
00058 
00059   return gsasl_callback (NULL, sctx, GSASL_VALIDATE_EXTERNAL);
00060 }