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3c0ef626 | 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" | |
c9f39d2c | 42 | RCSID("$OpenBSD: sshlogin.c,v 1.13 2004/08/12 09:18:24 djm Exp $"); |
3c0ef626 | 43 | |
44 | #include "loginrec.h" | |
c9f39d2c | 45 | #include "log.h" |
46 | #include "buffer.h" | |
47 | #include "servconf.h" | |
48 | ||
49 | extern Buffer loginmsg; | |
50 | extern ServerOptions options; | |
3c0ef626 | 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 | */ | |
3c0ef626 | 57 | u_long |
58 | get_last_login_time(uid_t uid, const char *logname, | |
680cee3b | 59 | char *buf, u_int bufsize) |
3c0ef626 | 60 | { |
99be0775 | 61 | struct logininfo li; |
3c0ef626 | 62 | |
99be0775 | 63 | login_get_lastlog(&li, uid); |
64 | strlcpy(buf, li.hostname, bufsize); | |
65 | return li.tv_sec; | |
3c0ef626 | 66 | } |
67 | ||
c9f39d2c | 68 | /* |
69 | * Generate and store last login message. This must be done before | |
70 | * login_login() is called and lastlog is updated. | |
71 | */ | |
72 | static void | |
73 | store_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 | ||
3c0ef626 | 100 | /* |
0fff78ff | 101 | * Records that the user has logged in. I wish these parts of operating |
102 | * systems were more standardized. | |
3c0ef626 | 103 | */ |
3c0ef626 | 104 | void |
c9f39d2c | 105 | record_login(pid_t pid, const char *tty, const char *user, uid_t uid, |
41b2f314 | 106 | const char *host, struct sockaddr * addr, socklen_t addrlen) |
3c0ef626 | 107 | { |
99be0775 | 108 | struct logininfo *li; |
3c0ef626 | 109 | |
c9f39d2c | 110 | /* save previous login details before writing new */ |
111 | store_lastlog_message(user, uid); | |
112 | ||
113 | li = login_alloc_entry(pid, user, host, tty); | |
99be0775 | 114 | login_set_addr(li, addr, addrlen); |
115 | login_login(li); | |
116 | login_free_entry(li); | |
3c0ef626 | 117 | } |
118 | ||
119 | #ifdef LOGIN_NEEDS_UTMPX | |
120 | void | |
121 | record_utmp_only(pid_t pid, const char *ttyname, const char *user, | |
6a9b3198 | 122 | const char *host, struct sockaddr * addr, socklen_t addrlen) |
3c0ef626 | 123 | { |
99be0775 | 124 | struct logininfo *li; |
3c0ef626 | 125 | |
99be0775 | 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); | |
3c0ef626 | 130 | } |
131 | #endif | |
132 | ||
133 | /* Records that the user has logged out. */ | |
3c0ef626 | 134 | void |
c9f39d2c | 135 | record_logout(pid_t pid, const char *tty, const char *user) |
3c0ef626 | 136 | { |
99be0775 | 137 | struct logininfo *li; |
3c0ef626 | 138 | |
c9f39d2c | 139 | li = login_alloc_entry(pid, user, NULL, tty); |
99be0775 | 140 | login_logout(li); |
141 | login_free_entry(li); | |
3c0ef626 | 142 | } |