xref: /freebsd/crypto/openssh/auth-shadow.c (revision 3642298923e528d795e3a30ec165d2b469e28b40)
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 RCSID("$Id: auth-shadow.c,v 1.7 2005/07/17 07:04:47 djm Exp $");
27 
28 #if defined(USE_SHADOW) && defined(HAS_SHADOW_EXPIRE)
29 #include <shadow.h>
30 
31 #include "auth.h"
32 #include "buffer.h"
33 #include "log.h"
34 
35 #ifdef DAY
36 # undef DAY
37 #endif
38 #define DAY	(24L * 60 * 60) /* 1 day in seconds */
39 
40 extern Buffer loginmsg;
41 
42 /*
43  * For the account and password expiration functions, we assume the expiry
44  * occurs the day after the day specified.
45  */
46 
47 /*
48  * Check if specified account is expired.  Returns 1 if account is expired,
49  * 0 otherwise.
50  */
51 int
52 auth_shadow_acctexpired(struct spwd *spw)
53 {
54 	time_t today;
55 	int daysleft;
56 	char buf[256];
57 
58 	today = time(NULL) / DAY;
59 	daysleft = spw->sp_expire - today;
60 	debug3("%s: today %d sp_expire %d days left %d", __func__, (int)today,
61 	    (int)spw->sp_expire, daysleft);
62 
63 	if (spw->sp_expire == -1) {
64 		debug3("account expiration disabled");
65 	} else if (daysleft < 0) {
66 		logit("Account %.100s has expired", spw->sp_namp);
67 		return 1;
68 	} else if (daysleft <= spw->sp_warn) {
69 		debug3("account will expire in %d days", daysleft);
70 		snprintf(buf, sizeof(buf),
71 		    "Your account will expire in %d day%s.\n", daysleft,
72 		    daysleft == 1 ? "" : "s");
73 		buffer_append(&loginmsg, buf, strlen(buf));
74 	}
75 
76 	return 0;
77 }
78 
79 /*
80  * Checks password expiry for platforms that use shadow passwd files.
81  * Returns: 1 = password expired, 0 = password not expired
82  */
83 int
84 auth_shadow_pwexpired(Authctxt *ctxt)
85 {
86 	struct spwd *spw = NULL;
87 	const char *user = ctxt->pw->pw_name;
88 	char buf[256];
89 	time_t today;
90 	int daysleft, disabled = 0;
91 
92 	if ((spw = getspnam((char *)user)) == NULL) {
93 		error("Could not get shadow information for %.100s", user);
94 		return 0;
95 	}
96 
97 	today = time(NULL) / DAY;
98 	debug3("%s: today %d sp_lstchg %d sp_max %d", __func__, (int)today,
99 	    (int)spw->sp_lstchg, (int)spw->sp_max);
100 
101 #if defined(__hpux) && !defined(HAVE_SECUREWARE)
102 	if (iscomsec()) {
103 		struct pr_passwd *pr;
104 
105 		pr = getprpwnam((char *)user);
106 
107 		/* Test for Trusted Mode expiry disabled */
108 		if (pr != NULL && pr->ufld.fd_min == 0 &&
109 		    pr->ufld.fd_lifetime == 0 && pr->ufld.fd_expire == 0 &&
110 		    pr->ufld.fd_pw_expire_warning == 0 &&
111 		    pr->ufld.fd_schange != 0)
112 			disabled = 1;
113 	}
114 #endif
115 
116 	/* TODO: check sp_inact */
117 	daysleft = spw->sp_lstchg + spw->sp_max - today;
118 	if (disabled) {
119 		debug3("password expiration disabled");
120 	} else if (spw->sp_lstchg == 0) {
121 		logit("User %.100s password has expired (root forced)", user);
122 		return 1;
123 	} else if (spw->sp_max == -1) {
124 		debug3("password expiration disabled");
125 	} else if (daysleft < 0) {
126 		logit("User %.100s password has expired (password aged)", user);
127 		return 1;
128 	} else if (daysleft <= spw->sp_warn) {
129 		debug3("password will expire in %d days", daysleft);
130 		snprintf(buf, sizeof(buf),
131 		    "Your password will expire in %d day%s.\n", daysleft,
132 		    daysleft == 1 ? "" : "s");
133 		buffer_append(&loginmsg, buf, strlen(buf));
134 	}
135 
136 	return 0;
137 }
138 #endif	/* USE_SHADOW && HAS_SHADOW_EXPIRE */
139