1 /*-
2 * Copyright (c) 2015 The NetBSD Foundation, Inc.
3 * Copyright (c) 2016 The FreeBSD Foundation, Inc.
4 * All rights reserved.
5 *
6 * Portions of this software were developed by Kurt Lidl
7 * under sponsorship from the FreeBSD Foundation.
8 *
9 * This code is derived from software contributed to The NetBSD Foundation
10 * by Christos Zoulas.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
23 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
25 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31 * POSSIBILITY OF SUCH DAMAGE.
32 */
33
34 #include "includes.h"
35
36 #include <ctype.h>
37 #include <stdarg.h>
38 #include <stdbool.h>
39 #include <stdio.h>
40 #include <stdlib.h>
41 #include <syslog.h>
42 #include <unistd.h>
43
44 #include "ssh.h"
45 #include "packet.h"
46 #include "log.h"
47 #include "misc.h"
48 #include "servconf.h"
49 #include <blacklist.h>
50 #include "blacklist_client.h"
51
52 static struct blacklist *blstate = NULL;
53
54 /* import */
55 extern ServerOptions options;
56
57 /* internal definition from bl.h */
58 struct blacklist *bl_create(bool, char *, void (*)(int, const char *, va_list));
59
60 /* impedence match vsyslog() to sshd's internal logging levels */
61 void
im_log(int priority,const char * message,va_list args)62 im_log(int priority, const char *message, va_list args)
63 {
64 LogLevel imlevel;
65
66 switch (priority) {
67 case LOG_ERR:
68 imlevel = SYSLOG_LEVEL_ERROR;
69 break;
70 case LOG_DEBUG:
71 imlevel = SYSLOG_LEVEL_DEBUG1;
72 break;
73 case LOG_INFO:
74 imlevel = SYSLOG_LEVEL_INFO;
75 break;
76 default:
77 imlevel = SYSLOG_LEVEL_DEBUG2;
78 }
79 do_log2(imlevel, message, args);
80 }
81
82 void
blacklist_init(void)83 blacklist_init(void)
84 {
85
86 if (options.use_blacklist)
87 blstate = bl_create(false, NULL, im_log);
88 }
89
90 void
blacklist_notify(struct ssh * ssh,int action,const char * msg)91 blacklist_notify(struct ssh *ssh, int action, const char *msg)
92 {
93
94 if (blstate != NULL && ssh_packet_connection_is_on_socket(ssh))
95 (void)blacklist_r(blstate, action,
96 ssh_packet_get_connection_in(ssh), msg);
97 }
98