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  1.   87598896ac8d29c19650bd12cbba2ccb93c9d95b
  2.   src
  3.   examples
  4.   digest_auth_example.c
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/*
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     This file is part of libmicrohttpd
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     Copyright (C) 2010 Christian Grothoff (and other contributing authors)
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     This library is free software; you can redistribute it and/or
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     modify it under the terms of the GNU Lesser General Public
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     License as published by the Free Software Foundation; either
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     version 2.1 of the License, or (at your option) any later version.
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     This library is distributed in the hope that it will be useful,
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     but WITHOUT ANY WARRANTY; without even the implied warranty of
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     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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     Lesser General Public License for more details.
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     You should have received a copy of the GNU Lesser General Public
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     License along with this library; if not, write to the Free Software
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     Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
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*/
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/**
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 * @file digest_auth_example.c
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 * @brief minimal example for how to use digest auth with libmicrohttpd
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 * @author Amr Ali
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 */
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#include "platform.h"
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#include <microhttpd.h>
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#include <stdlib.h>
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#define PAGE "<html><head><title>libmicrohttpd demo</title></head><body>Access granted</body></html>"
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#define DENIED "<html><head><title>libmicrohttpd demo</title></head><body>Access denied</body></html>"
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#define MY_OPAQUE_STR "11733b200778ce33060f31c9af70a870ba96ddd4"
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static int
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ahc_echo (void *cls,
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          struct MHD_Connection *connection,
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          const char *url,
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          const char *method,
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          const char *version,
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          const char *upload_data, size_t *upload_data_size, void **ptr)
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{
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  struct MHD_Response *response;
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  char *username;
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  const char *password = "testpass";
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  const char *realm = "test@example.com";
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  int ret;
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  (void)cls;               /* Unused. Silent compiler warning. */
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  (void)url;               /* Unused. Silent compiler warning. */
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  (void)method;            /* Unused. Silent compiler warning. */
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  (void)version;           /* Unused. Silent compiler warning. */
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  (void)upload_data;       /* Unused. Silent compiler warning. */
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  (void)upload_data_size;  /* Unused. Silent compiler warning. */
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  (void)ptr;               /* Unused. Silent compiler warning. */
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  username = MHD_digest_auth_get_username(connection);
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  if (NULL == username)
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    {
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      response = MHD_create_response_from_buffer(strlen (DENIED),
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						 DENIED,
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						 MHD_RESPMEM_PERSISTENT);
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      ret = MHD_queue_auth_fail_response(connection, realm,
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					 MY_OPAQUE_STR,
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					 response,
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					 MHD_NO);
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      MHD_destroy_response(response);
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      return ret;
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    }
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  ret = MHD_digest_auth_check(connection, realm,
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			      username,
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			      password,
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			      300);
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  MHD_free (username);
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  if ( (ret == MHD_INVALID_NONCE) ||
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       (ret == MHD_NO) )
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    {
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      response = MHD_create_response_from_buffer(strlen (DENIED),
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						 DENIED,
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						 MHD_RESPMEM_PERSISTENT);
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      if (NULL == response)
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	return MHD_NO;
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      ret = MHD_queue_auth_fail_response(connection, realm,
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					 MY_OPAQUE_STR,
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					 response,
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					 (ret == MHD_INVALID_NONCE) ? MHD_YES : MHD_NO);
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      MHD_destroy_response(response);
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      return ret;
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    }
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  response = MHD_create_response_from_buffer(strlen(PAGE), PAGE,
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					     MHD_RESPMEM_PERSISTENT);
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  ret = MHD_queue_response(connection, MHD_HTTP_OK, response);
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  MHD_destroy_response(response);
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  return ret;
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}
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int
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main (int argc, char *const *argv)
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{
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  int fd;
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  char rnd[8];
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  ssize_t len;
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  size_t off;
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  struct MHD_Daemon *d;
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  if (argc != 2)
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    {
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      printf ("%s PORT\n", argv[0]);
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      return 1;
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    }
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  fd = open("/dev/urandom", O_RDONLY);
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  if (-1 == fd)
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    {
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      fprintf (stderr, "Failed to open `%s': %s\n",
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	       "/dev/urandom",
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	       strerror (errno));
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      return 1;
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    }
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  off = 0;
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  while (off < 8)
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    {
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      len = read(fd, rnd, 8);
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      if (len == -1)
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	{
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	  fprintf (stderr, "Failed to read `%s': %s\n",
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		   "/dev/urandom",
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		   strerror (errno));
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	  (void) close (fd);
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	  return 1;
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	}
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      off += len;
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    }
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  (void) close(fd);
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  d = MHD_start_daemon (MHD_USE_THREAD_PER_CONNECTION | MHD_USE_INTERNAL_POLLING_THREAD | MHD_USE_ERROR_LOG,
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                        atoi (argv[1]),
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                        NULL, NULL, &ahc_echo, PAGE,
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			MHD_OPTION_DIGEST_AUTH_RANDOM, sizeof(rnd), rnd,
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			MHD_OPTION_NONCE_NC_SIZE, 300,
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			MHD_OPTION_CONNECTION_TIMEOUT, (unsigned int) 120,
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			MHD_OPTION_END);
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  if (d == NULL)
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    return 1;
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  (void) getc (stdin);
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  MHD_stop_daemon (d);
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  return 0;
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}
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/* end of digest_auth_example.c */

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