1 /*
2 This file is part of libmicrohttpd
3 Copyright (C) 2010 Christian Grothoff (and other contributing authors)
4
5 This library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 This library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with this library; if not, write to the Free Software
17 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18 */
19 /**
20 * @file digest_auth_example.c
21 * @brief minimal example for how to use digest auth with libmicrohttpd
22 * @author Amr Ali
23 */
24
25 #include "platform.h"
26 #include <microhttpd.h>
27 #include <stdlib.h>
28
29 #define PAGE "<html><head><title>libmicrohttpd demo</title></head><body>Access granted</body></html>"
30
31 #define DENIED "<html><head><title>libmicrohttpd demo</title></head><body>Access denied</body></html>"
32
33 #define MY_OPAQUE_STR "11733b200778ce33060f31c9af70a870ba96ddd4"
34
35 static int
ahc_echo(void * cls,struct MHD_Connection * connection,const char * url,const char * method,const char * version,const char * upload_data,size_t * upload_data_size,void ** ptr)36 ahc_echo (void *cls,
37 struct MHD_Connection *connection,
38 const char *url,
39 const char *method,
40 const char *version,
41 const char *upload_data, size_t *upload_data_size, void **ptr)
42 {
43 struct MHD_Response *response;
44 char *username;
45 const char *password = "testpass";
46 const char *realm = "test@example.com";
47 int ret;
48
49 username = MHD_digest_auth_get_username(connection);
50 if (username == NULL)
51 {
52 response = MHD_create_response_from_buffer(strlen (DENIED),
53 DENIED,
54 MHD_RESPMEM_PERSISTENT);
55 ret = MHD_queue_auth_fail_response(connection, realm,
56 MY_OPAQUE_STR,
57 response,
58 MHD_NO);
59 MHD_destroy_response(response);
60 return ret;
61 }
62 ret = MHD_digest_auth_check(connection, realm,
63 username,
64 password,
65 300);
66 free(username);
67 if ( (ret == MHD_INVALID_NONCE) ||
68 (ret == MHD_NO) )
69 {
70 response = MHD_create_response_from_buffer(strlen (DENIED),
71 DENIED,
72 MHD_RESPMEM_PERSISTENT);
73 if (NULL == response)
74 return MHD_NO;
75 ret = MHD_queue_auth_fail_response(connection, realm,
76 MY_OPAQUE_STR,
77 response,
78 (ret == MHD_INVALID_NONCE) ? MHD_YES : MHD_NO);
79 MHD_destroy_response(response);
80 return ret;
81 }
82 response = MHD_create_response_from_buffer(strlen(PAGE), PAGE,
83 MHD_RESPMEM_PERSISTENT);
84 ret = MHD_queue_response(connection, MHD_HTTP_OK, response);
85 MHD_destroy_response(response);
86 return ret;
87 }
88
89 int
main(int argc,char * const * argv)90 main (int argc, char *const *argv)
91 {
92 int fd;
93 char rnd[8];
94 ssize_t len;
95 size_t off;
96 struct MHD_Daemon *d;
97
98 if (argc != 2)
99 {
100 printf ("%s PORT\n", argv[0]);
101 return 1;
102 }
103 fd = open("/dev/urandom", O_RDONLY);
104 if (-1 == fd)
105 {
106 fprintf (stderr, "Failed to open `%s': %s\n",
107 "/dev/urandom",
108 strerror (errno));
109 return 1;
110 }
111 off = 0;
112 while (off < 8)
113 {
114 len = read(fd, rnd, 8);
115 if (len == -1)
116 {
117 fprintf (stderr, "Failed to read `%s': %s\n",
118 "/dev/urandom",
119 strerror (errno));
120 (void) close (fd);
121 return 1;
122 }
123 off += len;
124 }
125 (void) close(fd);
126 d = MHD_start_daemon (MHD_USE_THREAD_PER_CONNECTION | MHD_USE_DEBUG,
127 atoi (argv[1]),
128 NULL, NULL, &ahc_echo, PAGE,
129 MHD_OPTION_DIGEST_AUTH_RANDOM, sizeof(rnd), rnd,
130 MHD_OPTION_NONCE_NC_SIZE, 300,
131 MHD_OPTION_CONNECTION_TIMEOUT, (unsigned int) 120,
132 MHD_OPTION_END);
133 if (d == NULL)
134 return 1;
135 (void) getc (stdin);
136 MHD_stop_daemon (d);
137 return 0;
138 }
139
140 /* end of digest_auth_example.c */
141