1 /*
2 * Copyright (C) 1996-2021 The Squid Software Foundation and contributors
3 *
4 * Squid software is distributed under GPLv2+ license and includes
5 * contributions from numerous individuals and organizations.
6 * Please see the COPYING and CONTRIBUTORS files for details.
7 */
8
9 /*
10 * SASL authenticator module for Squid.
11 * Copyright (C) 2002 Ian Castle <ian.castle@coldcomfortfarm.net>
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
26 *
27 * Install instructions:
28 *
29 * This program authenticates users against using cyrus-sasl
30 *
31 * Compile this program with: gcc -Wall -o sasl_auth sasl_auth.c -lsasl
32 * or with SASL2: gcc -Wall -o sasl_auth sasl_auth.c -lsasl2
33 *
34 */
35 #include "squid.h"
36 #include "helper/protocol_defines.h"
37 #include "rfc1738.h"
38 #include "util.h"
39
40 #include <cerrno>
41 #include <cstdlib>
42 #include <cstring>
43 #if HAVE_SASL_SASL_H
44 #include <sasl/sasl.h>
45 #else
46 #include <sasl.h>
47 #endif
48
49 #define APP_NAME_SASL "basic_sasl_auth"
50
51 int
main(int,char * argv[])52 main(int, char *argv[])
53 {
54 char line[HELPER_INPUT_BUFFER];
55 char *username, *password;
56 #if SASL_VERSION_MAJOR < 2
57 const char *errstr;
58 #endif
59
60 int rc;
61 sasl_conn_t *conn = NULL;
62
63 /* make standard output line buffered */
64 setvbuf(stdout, NULL, _IOLBF, 0);
65
66 rc = sasl_server_init( NULL, APP_NAME_SASL );
67
68 if ( rc != SASL_OK ) {
69 fprintf(stderr, "FATAL: %d %s\n", rc, sasl_errstring(rc, NULL, NULL ));
70 return 1;
71 }
72
73 #if SASL_VERSION_MAJOR < 2
74 rc = sasl_server_new( APP_NAME_SASL, NULL, NULL, NULL, 0, &conn );
75 #else
76 rc = sasl_server_new( APP_NAME_SASL, NULL, NULL, NULL, NULL, NULL, 0, &conn );
77 #endif
78
79 if ( rc != SASL_OK ) {
80 fprintf(stderr, "FATAL: %d %s\n", rc, sasl_errstring(rc, NULL, NULL ));
81 return 1;
82 }
83
84 while ( fgets( line, HELPER_INPUT_BUFFER, stdin )) {
85 username = &line[0];
86 password = strchr( line, '\n' );
87 if (!password) {
88 debug("ERROR: %s: Unexpected input '%s'\n", argv[0], line);
89 SEND_ERR("Unexpected Empty Input");
90 continue;
91 }
92 *password = '\0';
93 password = strchr ( line, ' ' );
94 if (!password) {
95 debug("ERROR: %s: Unexpected input '%s' (no password)\n", argv[0], line );
96 SEND_ERR("No Password");
97 continue;
98 }
99 *password = '\0';
100 ++password;
101
102 rfc1738_unescape(username);
103 rfc1738_unescape(password);
104
105 #if SASL_VERSION_MAJOR < 2
106 rc = sasl_checkpass(conn, username, strlen(username), password, strlen(password), &errstr);
107 #else
108 rc = sasl_checkpass(conn, username, strlen(username), password, strlen(password));
109 #endif
110
111 if ( rc != SASL_OK ) {
112 #if SASL_VERSION_MAJOR < 2
113 if ( errstr ) {
114 debug("errstr %s\n", errstr);
115 }
116 if ( rc != SASL_BADAUTH ) {
117 debug("ERROR: %d %s\n", rc, sasl_errstring(rc, NULL, NULL));
118 SEND_ERR(sasl_errstring(rc, NULL, NULL));
119 } else
120 #endif
121 SEND_ERR("");
122 } else {
123 SEND_OK("");
124 }
125 }
126
127 sasl_dispose(&conn);
128 sasl_done();
129 return 0;
130 }
131
132