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00146caa | 1 | /* $OpenBSD: sshlogin.c,v 1.22 2006/07/22 20:48:23 stevesk Exp $ */ |
8efc0c15 | 2 | /* |
5260325f | 3 | * Author: Tatu Ylonen <ylo@cs.hut.fi> |
5260325f | 4 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
5 | * All rights reserved | |
5260325f | 6 | * This file performs some of the things login(1) normally does. We cannot |
7 | * easily use something like login -p -h host -f user, because there are | |
8 | * several different logins around, and it is hard to determined what kind of | |
9 | * login the current system has. Also, we want to be able to execute commands | |
10 | * on a tty. | |
6ae2364d | 11 | * |
bcbf86ec | 12 | * As far as I am concerned, the code I have written for this software |
13 | * can be used freely for any purpose. Any derived versions of this | |
14 | * software must be clearly marked as such, and if the derived work is | |
15 | * incompatible with the protocol description in the RFC file, it must be | |
16 | * called by a name other than "ssh" or "Secure Shell". | |
17 | * | |
18 | * Copyright (c) 1999 Theo de Raadt. All rights reserved. | |
19 | * Copyright (c) 1999 Markus Friedl. All rights reserved. | |
20 | * | |
21 | * Redistribution and use in source and binary forms, with or without | |
22 | * modification, are permitted provided that the following conditions | |
23 | * are met: | |
24 | * 1. Redistributions of source code must retain the above copyright | |
25 | * notice, this list of conditions and the following disclaimer. | |
26 | * 2. Redistributions in binary form must reproduce the above copyright | |
27 | * notice, this list of conditions and the following disclaimer in the | |
28 | * documentation and/or other materials provided with the distribution. | |
29 | * | |
30 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | |
31 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |
32 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
33 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
34 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
35 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
36 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
37 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
38 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
39 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
5260325f | 40 | */ |
8efc0c15 | 41 | |
42 | #include "includes.h" | |
8efc0c15 | 43 | |
5188ba17 | 44 | #include <sys/types.h> |
45 | ||
028094f4 | 46 | #include <errno.h> |
d3221cca | 47 | #include <fcntl.h> |
00146caa | 48 | #include <string.h> |
b0f6943a | 49 | #include <time.h> |
5188ba17 | 50 | #include <unistd.h> |
d3221cca | 51 | |
1d7b9b20 | 52 | #include "loginrec.h" |
be2ca0c9 | 53 | #include "log.h" |
54 | #include "buffer.h" | |
55 | #include "servconf.h" | |
56 | ||
57 | extern Buffer loginmsg; | |
58 | extern ServerOptions options; | |
5daf7064 | 59 | |
aa3378df | 60 | /* |
61 | * Returns the time when the user last logged in. Returns 0 if the | |
62 | * information is not available. This must be called before record_login. | |
63 | * The host the user logged in from will be returned in buf. | |
64 | */ | |
306f24ca | 65 | time_t |
5260325f | 66 | get_last_login_time(uid_t uid, const char *logname, |
306f24ca | 67 | char *buf, size_t bufsize) |
8efc0c15 | 68 | { |
769a750c | 69 | struct logininfo li; |
a7effaac | 70 | |
769a750c | 71 | login_get_lastlog(&li, uid); |
72 | strlcpy(buf, li.hostname, bufsize); | |
306f24ca | 73 | return (time_t)li.tv_sec; |
8efc0c15 | 74 | } |
75 | ||
be2ca0c9 | 76 | /* |
77 | * Generate and store last login message. This must be done before | |
78 | * login_login() is called and lastlog is updated. | |
79 | */ | |
7456203e | 80 | static void |
be2ca0c9 | 81 | store_lastlog_message(const char *user, uid_t uid) |
82 | { | |
83 | char *time_string, hostname[MAXHOSTNAMELEN] = "", buf[512]; | |
84 | time_t last_login_time; | |
85 | ||
86 | #ifndef NO_SSH_LASTLOG | |
87 | if (!options.print_lastlog) | |
88 | return; | |
89 | ||
90 | last_login_time = get_last_login_time(uid, user, hostname, | |
91 | sizeof(hostname)); | |
92 | ||
93 | if (last_login_time != 0) { | |
94 | time_string = ctime(&last_login_time); | |
95 | if (strchr(time_string, '\n')) | |
96 | *strchr(time_string, '\n') = '\0'; | |
97 | if (strcmp(hostname, "") == 0) | |
98 | snprintf(buf, sizeof(buf), "Last login: %s\r\n", | |
99 | time_string); | |
100 | else | |
101 | snprintf(buf, sizeof(buf), "Last login: %s from %s\r\n", | |
102 | time_string, hostname); | |
103 | buffer_append(&loginmsg, buf, strlen(buf)); | |
104 | } | |
105 | #endif /* NO_SSH_LASTLOG */ | |
106 | } | |
107 | ||
aa3378df | 108 | /* |
b8e04133 | 109 | * Records that the user has logged in. I wish these parts of operating |
110 | * systems were more standardized. | |
aa3378df | 111 | */ |
6ae2364d | 112 | void |
ca75d7de | 113 | record_login(pid_t pid, const char *tty, const char *user, uid_t uid, |
32596c7b | 114 | const char *host, struct sockaddr *addr, socklen_t addrlen) |
8efc0c15 | 115 | { |
769a750c | 116 | struct logininfo *li; |
8efc0c15 | 117 | |
be2ca0c9 | 118 | /* save previous login details before writing new */ |
119 | store_lastlog_message(user, uid); | |
120 | ||
ca75d7de | 121 | li = login_alloc_entry(pid, user, host, tty); |
769a750c | 122 | login_set_addr(li, addr, addrlen); |
123 | login_login(li); | |
124 | login_free_entry(li); | |
8efc0c15 | 125 | } |
5260325f | 126 | |
7e2d5fa4 | 127 | #ifdef LOGIN_NEEDS_UTMPX |
128 | void | |
129 | record_utmp_only(pid_t pid, const char *ttyname, const char *user, | |
5b04a8bf | 130 | const char *host, struct sockaddr *addr, socklen_t addrlen) |
7e2d5fa4 | 131 | { |
769a750c | 132 | struct logininfo *li; |
7e2d5fa4 | 133 | |
769a750c | 134 | li = login_alloc_entry(pid, user, host, ttyname); |
135 | login_set_addr(li, addr, addrlen); | |
136 | login_utmp_only(li); | |
137 | login_free_entry(li); | |
7e2d5fa4 | 138 | } |
139 | #endif | |
140 | ||
5260325f | 141 | /* Records that the user has logged out. */ |
6ae2364d | 142 | void |
ca75d7de | 143 | record_logout(pid_t pid, const char *tty, const char *user) |
8efc0c15 | 144 | { |
769a750c | 145 | struct logininfo *li; |
1d7b9b20 | 146 | |
ca75d7de | 147 | li = login_alloc_entry(pid, user, NULL, tty); |
769a750c | 148 | login_logout(li); |
149 | login_free_entry(li); | |
8efc0c15 | 150 | } |