gsasl  1.8.0
plain/client.c
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00001 /* client.c --- SASL mechanism PLAIN as defined in RFC 2595, client 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 "plain.h"
00029 
00030 /* Get memcpy, strdup, strlen. */
00031 #include <string.h>
00032 
00033 /* Get malloc, free. */
00034 #include <stdlib.h>
00035 
00036 int
00037 _gsasl_plain_client_step (Gsasl_session * sctx,
00038                           void *mech_data,
00039                           const char *input, size_t input_len,
00040                           char **output, size_t * output_len)
00041 {
00042   const char *authzid = gsasl_property_get (sctx, GSASL_AUTHZID);
00043   const char *authid = gsasl_property_get (sctx, GSASL_AUTHID);
00044   const char *password = gsasl_property_get (sctx, GSASL_PASSWORD);
00045   size_t authzidlen = 0, authidlen = 0, passwordlen = 0;
00046   char *out;
00047 
00048   if (authzid)
00049     authzidlen = strlen (authzid);
00050 
00051   if (authid)
00052     authidlen = strlen (authid);
00053   else
00054     return GSASL_NO_AUTHID;
00055 
00056   if (password)
00057     passwordlen = strlen (password);
00058   else
00059     return GSASL_NO_PASSWORD;
00060 
00061   *output_len = authzidlen + 1 + authidlen + 1 + passwordlen;
00062   *output = out = malloc (*output_len);
00063   if (!out)
00064     return GSASL_MALLOC_ERROR;
00065 
00066   if (authzid)
00067     {
00068       memcpy (out, authzid, authzidlen);
00069       out += authzidlen;
00070     }
00071 
00072   *out++ = '\0';
00073 
00074   memcpy (out, authid, authidlen);
00075   out += authidlen;
00076 
00077   *out++ = '\0';
00078 
00079   memcpy (out, password, passwordlen);
00080 
00081   return GSASL_OK;
00082 }