xref: /openssh-portable/auth-shadow.c (revision 3f420a69)
1 /*
2  * Copyright (c) 2004 Darren Tucker.  All rights reserved.
3  *
4  * Redistribution and use in source and binary forms, with or without
5  * modification, are permitted provided that the following conditions
6  * are met:
7  * 1. Redistributions of source code must retain the above copyright
8  *    notice, this list of conditions and the following disclaimer.
9  * 2. Redistributions in binary form must reproduce the above copyright
10  *    notice, this list of conditions and the following disclaimer in the
11  *    documentation and/or other materials provided with the distribution.
12  *
13  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
14  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
15  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
16  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
17  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
18  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
19  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
20  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
22  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23  */
24 
25 #include "includes.h"
26 
27 #if defined(USE_SHADOW) && defined(HAS_SHADOW_EXPIRE)
28 #include <shadow.h>
29 #include <stdarg.h>
30 #include <string.h>
31 #include <time.h>
32 
33 #include "hostfile.h"
34 #include "auth.h"
35 #include "sshbuf.h"
36 #include "ssherr.h"
37 #include "log.h"
38 
39 #ifdef DAY
40 # undef DAY
41 #endif
42 #define DAY	(24L * 60 * 60) /* 1 day in seconds */
43 
44 extern struct sshbuf *loginmsg;
45 
46 /*
47  * For the account and password expiration functions, we assume the expiry
48  * occurs the day after the day specified.
49  */
50 
51 /*
52  * Check if specified account is expired.  Returns 1 if account is expired,
53  * 0 otherwise.
54  */
55 int
auth_shadow_acctexpired(struct spwd * spw)56 auth_shadow_acctexpired(struct spwd *spw)
57 {
58 	time_t today;
59 	int daysleft;
60 	int r;
61 
62 	today = time(NULL) / DAY;
63 	daysleft = spw->sp_expire - today;
64 	debug3("%s: today %d sp_expire %d days left %d", __func__, (int)today,
65 	    (int)spw->sp_expire, daysleft);
66 
67 	if (spw->sp_expire == -1) {
68 		debug3("account expiration disabled");
69 	} else if (daysleft < 0) {
70 		logit("Account %.100s has expired", spw->sp_namp);
71 		return 1;
72 	} else if (daysleft <= spw->sp_warn) {
73 		debug3("account will expire in %d days", daysleft);
74 		if ((r = sshbuf_putf(loginmsg,
75 		    "Your account will expire in %d day%s.\n", daysleft,
76 		    daysleft == 1 ? "" : "s")) != 0)
77 			fatal("%s: buffer error: %s", __func__, ssh_err(r));
78 	}
79 
80 	return 0;
81 }
82 
83 /*
84  * Checks password expiry for platforms that use shadow passwd files.
85  * Returns: 1 = password expired, 0 = password not expired
86  */
87 int
auth_shadow_pwexpired(Authctxt * ctxt)88 auth_shadow_pwexpired(Authctxt *ctxt)
89 {
90 	struct spwd *spw = NULL;
91 	const char *user = ctxt->pw->pw_name;
92 	time_t today;
93 	int r, daysleft, disabled = 0;
94 
95 	if ((spw = getspnam((char *)user)) == NULL) {
96 		error("Could not get shadow information for %.100s", user);
97 		return 0;
98 	}
99 
100 	today = time(NULL) / DAY;
101 	debug3("%s: today %d sp_lstchg %d sp_max %d", __func__, (int)today,
102 	    (int)spw->sp_lstchg, (int)spw->sp_max);
103 
104 #if defined(__hpux) && !defined(HAVE_SECUREWARE)
105 	if (iscomsec()) {
106 		struct pr_passwd *pr;
107 
108 		pr = getprpwnam((char *)user);
109 
110 		/* Test for Trusted Mode expiry disabled */
111 		if (pr != NULL && pr->ufld.fd_min == 0 &&
112 		    pr->ufld.fd_lifetime == 0 && pr->ufld.fd_expire == 0 &&
113 		    pr->ufld.fd_pw_expire_warning == 0 &&
114 		    pr->ufld.fd_schange != 0)
115 			disabled = 1;
116 	}
117 #endif
118 
119 	/* TODO: check sp_inact */
120 	daysleft = spw->sp_lstchg + spw->sp_max - today;
121 	if (disabled) {
122 		debug3("password expiration disabled");
123 	} else if (spw->sp_lstchg == 0) {
124 		logit("User %.100s password has expired (root forced)", user);
125 		return 1;
126 	} else if (spw->sp_max == -1) {
127 		debug3("password expiration disabled");
128 	} else if (daysleft < 0) {
129 		logit("User %.100s password has expired (password aged)", user);
130 		return 1;
131 	} else if (daysleft <= spw->sp_warn) {
132 		debug3("password will expire in %d days", daysleft);
133 		if ((r = sshbuf_putf(loginmsg,
134 		    "Your password will expire in %d day%s.\n", daysleft,
135 		    daysleft == 1 ? "" : "s")) != 0)
136 			fatal("%s: buffer error: %s", __func__, ssh_err(r));
137 	}
138 
139 	return 0;
140 }
141 #endif	/* USE_SHADOW && HAS_SHADOW_EXPIRE */
142