1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
|
/* Feel free to use this example code in any way
you see fit (Public Domain) */
#include <sys/types.h>
#ifndef _WIN32
#include <sys/select.h>
#include <sys/socket.h>
#else
#include <winsock2.h>
#endif
#include <microhttpd.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#define PORT 8888
#define REALM "Maintenance"
#define USER "a legitimate user"
#define PASSWORD "and his password"
#define SERVERKEYFILE "server.key"
#define SERVERCERTFILE "server.pem"
static size_t
get_file_size (const char *filename)
{
FILE *fp;
fp = fopen (filename, "rb");
if (fp)
{
long size;
if ((0 != fseek (fp, 0, SEEK_END)) || (-1 == (size = ftell (fp))))
size = 0;
fclose (fp);
return (size_t) size;
}
else
return 0;
}
static char *
load_file (const char *filename)
{
FILE *fp;
char *buffer;
size_t size;
size = get_file_size (filename);
if (0 == size)
return NULL;
fp = fopen (filename, "rb");
if (! fp)
return NULL;
buffer = malloc (size + 1);
if (! buffer)
{
fclose (fp);
return NULL;
}
buffer[size] = '\0';
if (size != fread (buffer, 1, size, fp))
{
free (buffer);
buffer = NULL;
}
fclose (fp);
return buffer;
}
static enum MHD_Result
ask_for_authentication (struct MHD_Connection *connection, const char *realm)
{
enum MHD_Result ret;
struct MHD_Response *response;
response = MHD_create_response_empty (MHD_RF_NONE);
if (! response)
return MHD_NO;
ret = MHD_queue_basic_auth_fail_response3 (connection,
realm,
MHD_YES,
response);
MHD_destroy_response (response);
return ret;
}
static int
is_authenticated (struct MHD_Connection *connection,
const char *username,
const char *password)
{
struct MHD_BasicAuthInfo *auth_info;
int authenticated;
auth_info = MHD_basic_auth_get_username_password3 (connection);
if (NULL == auth_info)
return 0;
authenticated =
( (strlen (username) == auth_info->username_len) &&
(0 == memcmp (auth_info->username, username, auth_info->username_len)) &&
/* The next check against NULL is optional,
* if 'password' is NULL then 'password_len' is always zero. */
(NULL != auth_info->password) &&
(strlen (password) == auth_info->password_len) &&
(0 == memcmp (auth_info->password, password, auth_info->password_len)) );
MHD_free (auth_info);
return authenticated;
}
static enum MHD_Result
secret_page (struct MHD_Connection *connection)
{
enum MHD_Result ret;
struct MHD_Response *response;
const char *page = "<html><body>A secret.</body></html>";
response = MHD_create_response_from_buffer_static (strlen (page), page);
if (! response)
return MHD_NO;
ret = MHD_queue_response (connection, MHD_HTTP_OK, response);
MHD_destroy_response (response);
return ret;
}
static enum MHD_Result
answer_to_connection (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 **req_cls)
{
(void) cls; /* Unused. Silent compiler warning. */
(void) url; /* Unused. Silent compiler warning. */
(void) version; /* Unused. Silent compiler warning. */
(void) upload_data; /* Unused. Silent compiler warning. */
(void) upload_data_size; /* Unused. Silent compiler warning. */
if (0 != strcmp (method, "GET"))
return MHD_NO;
if (NULL == *req_cls)
{
*req_cls = connection;
return MHD_YES;
}
if (! is_authenticated (connection, USER, PASSWORD))
return ask_for_authentication (connection, REALM);
return secret_page (connection);
}
int
main (void)
{
struct MHD_Daemon *daemon;
char *key_pem;
char *cert_pem;
key_pem = load_file (SERVERKEYFILE);
cert_pem = load_file (SERVERCERTFILE);
if ((key_pem == NULL) || (cert_pem == NULL))
{
printf ("The key/certificate files could not be read.\n");
if (NULL != key_pem)
free (key_pem);
if (NULL != cert_pem)
free (cert_pem);
return 1;
}
daemon =
MHD_start_daemon (MHD_USE_INTERNAL_POLLING_THREAD | MHD_USE_TLS, PORT, NULL,
NULL, &answer_to_connection, NULL,
MHD_OPTION_HTTPS_MEM_KEY, key_pem,
MHD_OPTION_HTTPS_MEM_CERT, cert_pem, MHD_OPTION_END);
if (NULL == daemon)
{
printf ("%s\n", cert_pem);
free (key_pem);
free (cert_pem);
return 1;
}
(void) getchar ();
MHD_stop_daemon (daemon);
free (key_pem);
free (cert_pem);
return 0;
}
|
