1 /*
2 * Author: Tatu Ylonen <ylo@cs.hut.fi>
3 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
4 * All rights reserved
5 * This file performs some of the things login(1) normally does. We cannot
6 * easily use something like login -p -h host -f user, because there are
7 * several different logins around, and it is hard to determined what kind of
8 * login the current system has. Also, we want to be able to execute commands
9 * on a tty.
10 *
11 * As far as I am concerned, the code I have written for this software
12 * can be used freely for any purpose. Any derived versions of this
13 * software must be clearly marked as such, and if the derived work is
14 * incompatible with the protocol description in the RFC file, it must be
15 * called by a name other than "ssh" or "Secure Shell".
16 *
17 * Copyright (c) 1999 Theo de Raadt. All rights reserved.
18 * Copyright (c) 1999 Markus Friedl. All rights reserved.
19 *
20 * Redistribution and use in source and binary forms, with or without
21 * modification, are permitted provided that the following conditions
22 * are met:
23 * 1. Redistributions of source code must retain the above copyright
24 * notice, this list of conditions and the following disclaimer.
25 * 2. Redistributions in binary form must reproduce the above copyright
26 * notice, this list of conditions and the following disclaimer in the
27 * documentation and/or other materials provided with the distribution.
28 *
29 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
30 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
31 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
32 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
33 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
34 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
35 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
36 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
38 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 */
40 /*
41 * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
42 * Use is subject to license terms.
43 */
44
45 #include "includes.h"
46 RCSID("$OpenBSD: sshlogin.c,v 1.5 2002/08/29 15:57:25 stevesk Exp $");
47
48 #include "loginrec.h"
49 #include "log.h"
50 #include "buffer.h"
51 #include "servconf.h"
52 #include "canohost.h"
53 #include "packet.h"
54
55 extern u_int utmp_len;
56 extern ServerOptions options;
57
58 /*
59 * Returns the time when the user last logged in. Returns 0 if the
60 * information is not available. This must be called before record_login.
61 * The host the user logged in from will be returned in buf.
62 */
63 u_long
get_last_login_time(uid_t uid,const char * logname,char * buf,u_int bufsize)64 get_last_login_time(uid_t uid, const char *logname,
65 char *buf, u_int bufsize)
66 {
67 struct logininfo li;
68
69 (void) login_get_lastlog(&li, uid);
70 (void) strlcpy(buf, li.hostname, bufsize);
71 return li.tv_sec;
72 }
73
74 /*
75 * Records that the user has logged in. If only these parts of operating
76 * systems were more standardized.
77 */
78 void
record_login(pid_t pid,const char * ttyname,const char * progname,const char * user)79 record_login(pid_t pid, const char *ttyname, const char *progname,
80 const char *user)
81 {
82 struct logininfo *li;
83 static int initialized = 0;
84 static socklen_t fromlen;
85 static struct sockaddr_storage from;
86 static const char *remote_name_or_ip;
87
88 if (pid == 0)
89 pid = getpid();
90 /*
91 * Get IP address of client. If the connection is not a socket, let
92 * the address be 0.0.0.0.
93 */
94 if (!initialized) {
95 (void) memset(&from, 0, sizeof(from));
96 if (packet_connection_is_on_socket()) {
97 fromlen = sizeof(from);
98 if (getpeername(packet_get_connection_in(),
99 (struct sockaddr *) &from, &fromlen) < 0) {
100 debug("getpeername: %.100s", strerror(errno));
101 fatal_cleanup();
102 }
103 }
104 remote_name_or_ip = get_remote_name_or_ip(utmp_len,
105 options.verify_reverse_mapping);
106
107 initialized = 1;
108 }
109
110 li = login_alloc_entry(pid, user, remote_name_or_ip, ttyname, progname);
111 login_set_addr(li, (struct sockaddr*) &from, sizeof(struct sockaddr));
112 (void) login_login(li);
113 login_free_entry(li);
114 }
115
116 /* Records that the user has logged out. */
117 void
record_logout(pid_t pid,const char * ttyname,const char * progname,const char * user)118 record_logout(pid_t pid, const char *ttyname, const char *progname,
119 const char *user)
120 {
121 struct logininfo *li;
122
123 li = login_alloc_entry(pid, user, NULL, ttyname, progname);
124 (void) login_logout(li);
125 login_free_entry(li);
126 }
127