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
|
/*
Weborf
Copyright (C) 2010 Salvo "LtWorf" Tomaselli
Weborf is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
@author Salvo "LtWorf" Tomaselli <tiposchi@tiscali.it>
*/
#include "options.h"
#include <sys/socket.h>
#include <sys/types.h>
#include <sys/un.h>
#include <syslog.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
#include "types.h"
#include "auth.h"
#include "instance.h"
#include "base64.h"
extern weborf_configuration_t weborf_conf;
#include "embedded_auth.h"
/**
Checks that the authentication socket exists and is a unix socket
*/
void auth_set_socket(char *u_socket) {
#ifdef EMBEDDED_AUTH
weborf_conf.authsock = "embedded";
#else
struct stat sb;
if (stat(u_socket, &sb) == -1) {
perror("Existing unix socket expected");
#ifdef SERVERDBG
syslog(LOG_ERR, "%s doesn't exist", u_socket);
#endif
exit(5);
}
if ((sb.st_mode & S_IFMT) != S_IFSOCK) {
#ifdef SERVERDBG
syslog(LOG_ERR, "%s is not a socket", u_socket);
#endif
dprintf(2, "Socket expected\n");
exit(5);
}
weborf_conf.authsock = u_socket;
#endif
}
/**
This function checks if the authentication can be granted or not calling the external program.
Returns 0 if authorization is granted.
*/
int auth_check_request(connection_t *connection_prop) {
if (weborf_conf.authsock==NULL) return 0;
char username[PWDLIMIT*2];
char* password=username; //will be changed if there is a password
char* auth=strstr(connection_prop->http_param,"Authorization: Basic ");//Locates the auth information
if (auth==NULL) { //No auth informations
username[0]=0;
//password[0]=0;
} else { //Retrieves provided username and password
char*auth_end=strstr(auth,"\r\n");//Finds the end of the header
if (auth_end==NULL) return -1;
char a[PWDLIMIT*2];
auth+=21;//Moves the begin of the string to exclude Authorization: Basic
if ((auth_end-auth+1)<(PWDLIMIT*2))
memcpy(&a,auth,auth_end-auth); //Copies the base64 encoded string to a temp buffer
else { //Auth string is too long for the buffer
#ifdef SERVERDBG
syslog(LOG_ERR,"Unable to accept authentication, buffer is too small");
#endif
return ERR_NOMEM;
}
a[auth_end-auth]=0;
decode64(username,a);//Decodes the base64 string
password=strstr(username,":");//Locates the separator :
if (password==NULL) return -1;
password[0]=0;//Nulls the separator to split username and password
password++;//make password point to the beginning of the password
}
int result=-1;
#ifdef EMBEDDED_AUTH
result=c_auth(connection_prop->page,
connection_prop->ip_addr,
connection_prop->method,
username,
password,
connection_prop->http_param);
#else
{
int s,len;
struct sockaddr_un remote;
s=socket(AF_UNIX,SOCK_STREAM,0);
remote.sun_family = AF_UNIX;
strcpy(remote.sun_path, weborf_conf.authsock);
len = strlen(remote.sun_path) + sizeof(remote.sun_family);
if (connect(s, (struct sockaddr *)&remote, len) == -1) {//Unable to connect
return -1;
}
char* auth_str=malloc(HEADBUF+PWDLIMIT*2);
if (auth_str==NULL) {
#ifdef SERVERDBG
syslog(LOG_CRIT,"Not enough memory to allocate buffers");
#endif
return -1;
}
int auth_str_l=snprintf(auth_str,HEADBUF+PWDLIMIT*2,"%s\r\n%s\r\n%s\r\n%s\r\n%s\r\n%s\r\n",connection_prop->page,connection_prop->ip_addr,connection_prop->method,username,password,connection_prop->http_param);
if (write(s,auth_str,auth_str_l)==auth_str_l && read(s,auth_str,1)==0) {//All data written and no output, ok
result=0;
}
close(s);
free(auth_str);
}
#endif
return result;
}
|
