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#include "includes.h"
42RCSID("$OpenBSD: sshlogin.c,v 1.13 2004/08/12 09:18:24 djm Exp $");
43
44#include "loginrec.h"
45#include "log.h"
46#include "buffer.h"
47#include "servconf.h"
48
49extern Buffer loginmsg;
50extern ServerOptions options;
51
52/*
53 * Returns the time when the user last logged in. Returns 0 if the
54 * information is not available. This must be called before record_login.
55 * The host the user logged in from will be returned in buf.
56 */
57u_long
58get_last_login_time(uid_t uid, const char *logname,
59 char *buf, u_int bufsize)
60{
61 struct logininfo li;
62
63 login_get_lastlog(&li, uid);
64 strlcpy(buf, li.hostname, bufsize);
65 return li.tv_sec;
66}
67
68/*
69 * Generate and store last login message. This must be done before
70 * login_login() is called and lastlog is updated.
71 */
72static void
73store_lastlog_message(const char *user, uid_t uid)
74{
75 char *time_string, hostname[MAXHOSTNAMELEN] = "", buf[512];
76 time_t last_login_time;
77
78#ifndef NO_SSH_LASTLOG
79 if (!options.print_lastlog)
80 return;
81
82 last_login_time = get_last_login_time(uid, user, hostname,
83 sizeof(hostname));
84
85 if (last_login_time != 0) {
86 time_string = ctime(&last_login_time);
87 if (strchr(time_string, '\n'))
88 *strchr(time_string, '\n') = '\0';
89 if (strcmp(hostname, "") == 0)
90 snprintf(buf, sizeof(buf), "Last login: %s\r\n",
91 time_string);
92 else
93 snprintf(buf, sizeof(buf), "Last login: %s from %s\r\n",
94 time_string, hostname);
95 buffer_append(&loginmsg, buf, strlen(buf));
96 }
97#endif /* NO_SSH_LASTLOG */
98}
99
100/*
101 * Records that the user has logged in. I wish these parts of operating
102 * systems were more standardized.
103 */
104void
105record_login(pid_t pid, const char *tty, const char *user, uid_t uid,
106 const char *host, struct sockaddr * addr, socklen_t addrlen)
107{
108 struct logininfo *li;
109
110 /* save previous login details before writing new */
111 store_lastlog_message(user, uid);
112
113 li = login_alloc_entry(pid, user, host, tty);
114 login_set_addr(li, addr, addrlen);
115 login_login(li);
116 login_free_entry(li);
117}
118
119#ifdef LOGIN_NEEDS_UTMPX
120void
121record_utmp_only(pid_t pid, const char *ttyname, const char *user,
122 const char *host, struct sockaddr * addr, socklen_t addrlen)
123{
124 struct logininfo *li;
125
126 li = login_alloc_entry(pid, user, host, ttyname);
127 login_set_addr(li, addr, addrlen);
128 login_utmp_only(li);
129 login_free_entry(li);
130}
131#endif
132
133/* Records that the user has logged out. */
134void
135record_logout(pid_t pid, const char *tty, const char *user)
136{
137 struct logininfo *li;
138
139 li = login_alloc_entry(pid, user, NULL, tty);
140 login_logout(li);
141 login_free_entry(li);
142}
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#include "includes.h"
42RCSID("$OpenBSD: sshlogin.c,v 1.13 2004/08/12 09:18:24 djm Exp $");
43
44#include "loginrec.h"
45#include "log.h"
46#include "buffer.h"
47#include "servconf.h"
48
49extern Buffer loginmsg;
50extern ServerOptions options;
51
52/*
53 * Returns the time when the user last logged in. Returns 0 if the
54 * information is not available. This must be called before record_login.
55 * The host the user logged in from will be returned in buf.
56 */
57u_long
58get_last_login_time(uid_t uid, const char *logname,
59 char *buf, u_int bufsize)
60{
61 struct logininfo li;
62
63 login_get_lastlog(&li, uid);
64 strlcpy(buf, li.hostname, bufsize);
65 return li.tv_sec;
66}
67
68/*
69 * Generate and store last login message. This must be done before
70 * login_login() is called and lastlog is updated.
71 */
72static void
73store_lastlog_message(const char *user, uid_t uid)
74{
75 char *time_string, hostname[MAXHOSTNAMELEN] = "", buf[512];
76 time_t last_login_time;
77
78#ifndef NO_SSH_LASTLOG
79 if (!options.print_lastlog)
80 return;
81
82 last_login_time = get_last_login_time(uid, user, hostname,
83 sizeof(hostname));
84
85 if (last_login_time != 0) {
86 time_string = ctime(&last_login_time);
87 if (strchr(time_string, '\n'))
88 *strchr(time_string, '\n') = '\0';
89 if (strcmp(hostname, "") == 0)
90 snprintf(buf, sizeof(buf), "Last login: %s\r\n",
91 time_string);
92 else
93 snprintf(buf, sizeof(buf), "Last login: %s from %s\r\n",
94 time_string, hostname);
95 buffer_append(&loginmsg, buf, strlen(buf));
96 }
97#endif /* NO_SSH_LASTLOG */
98}
99
100/*
101 * Records that the user has logged in. I wish these parts of operating
102 * systems were more standardized.
103 */
104void
105record_login(pid_t pid, const char *tty, const char *user, uid_t uid,
106 const char *host, struct sockaddr * addr, socklen_t addrlen)
107{
108 struct logininfo *li;
109
110 /* save previous login details before writing new */
111 store_lastlog_message(user, uid);
112
113 li = login_alloc_entry(pid, user, host, tty);
114 login_set_addr(li, addr, addrlen);
115 login_login(li);
116 login_free_entry(li);
117}
118
119#ifdef LOGIN_NEEDS_UTMPX
120void
121record_utmp_only(pid_t pid, const char *ttyname, const char *user,
122 const char *host, struct sockaddr * addr, socklen_t addrlen)
123{
124 struct logininfo *li;
125
126 li = login_alloc_entry(pid, user, host, ttyname);
127 login_set_addr(li, addr, addrlen);
128 login_utmp_only(li);
129 login_free_entry(li);
130}
131#endif
132
133/* Records that the user has logged out. */
134void
135record_logout(pid_t pid, const char *tty, const char *user)
136{
137 struct logininfo *li;
138
139 li = login_alloc_entry(pid, user, NULL, tty);
140 login_logout(li);
141 login_free_entry(li);
142}