From 5c14c734295b9a30d71d110deb8307d5610d4c01 Mon Sep 17 00:00:00 2001
From: Darren Tucker <dtucker@zip.com.au>
Date: Mon, 24 Jan 2005 21:55:49 +1100
Subject: [PATCH]    - otto@cvs.openbsd.org 2005/01/21 08:32:02     
 [auth-passwd.c sshd.c]      Warn in advance for password and account expiry;
 initialize loginmsg      buffer earlier and clear it after privsep fork. ok
 and help dtucker@      markus@

---
 ChangeLog     | 10 +++++++++-
 auth-passwd.c | 51 ++++++++++++++++++++++++++++++++++++++++++++++++++-
 sshd.c        | 11 ++++-------
 3 files changed, 63 insertions(+), 9 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 8af4ea5f7..f33f2c242 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+20050124
+ - (dtucker) OpenBSD CVS Sync
+   - otto@cvs.openbsd.org 2005/01/21 08:32:02
+     [auth-passwd.c sshd.c]
+     Warn in advance for password and account expiry; initialize loginmsg
+     buffer earlier and clear it after privsep fork. ok and help dtucker@
+     markus@
+
 20050120
  - (dtucker) OpenBSD CVS Sync
    - markus@cvs.openbsd.org 2004/12/23 17:35:48
@@ -2015,4 +2023,4 @@
    - (djm) Trim deprecated options from INSTALL. Mention UsePAM
    - (djm) Fix quote handling in sftp; Patch from admorten AT umich.edu
 
-$Id: ChangeLog,v 1.3620 2005/01/20 11:20:50 dtucker Exp $
+$Id: ChangeLog,v 1.3621 2005/01/24 10:55:49 dtucker Exp $
diff --git a/auth-passwd.c b/auth-passwd.c
index 7a68e0562..2e5fbc73a 100644
--- a/auth-passwd.c
+++ b/auth-passwd.c
@@ -36,17 +36,27 @@
  */
 
 #include "includes.h"
-RCSID("$OpenBSD: auth-passwd.c,v 1.31 2004/01/30 09:48:57 markus Exp $");
+RCSID("$OpenBSD: auth-passwd.c,v 1.32 2005/01/21 08:32:02 otto Exp $");
 
 #include "packet.h"
+#include "buffer.h"
 #include "log.h"
 #include "servconf.h"
 #include "auth.h"
 #include "auth-options.h"
 
+extern Buffer loginmsg;
 extern ServerOptions options;
 int sys_auth_passwd(Authctxt *, const char *);
 
+#ifdef HAVE_LOGIN_CAP
+extern login_cap_t *lc;
+#endif
+
+
+#define DAY		(24L * 60 * 60) /* 1 day in seconds */
+#define TWO_WEEKS	(2L * 7 * DAY)	/* 2 weeks in seconds */
+
 void
 disable_forwarding(void)
 {
@@ -111,11 +121,46 @@ auth_password(Authctxt *authctxt, const char *password)
 }
 
 #ifdef BSD_AUTH
+static void
+warn_expiry(Authctxt *authctxt, auth_session_t *as)
+{
+	char buf[256];
+	quad_t pwtimeleft, actimeleft, daysleft, pwwarntime, acwarntime;
+
+	pwwarntime = acwarntime = TWO_WEEKS;
+
+	pwtimeleft = auth_check_change(as);
+	actimeleft = auth_check_expire(as);
+#if HAVE_LOGIN_CAP
+	if (authctxt->valid) {
+		pwwarntime = login_getcaptime(lc, "password-warn", TWO_WEEKS,
+		    TWO_WEEKS);
+		acwarntime = login_getcaptime(lc, "expire-warn", TWO_WEEKS,
+		    TWO_WEEKS);
+	}
+#endif
+	if (pwtimeleft != 0 && pwtimeleft < pwwarntime) {
+		daysleft = pwtimeleft / DAY + 1;
+		snprintf(buf, sizeof(buf),
+		    "Your password will expire in %lld day%s.\n",
+		    daysleft, daysleft == 1 ? "" : "s");
+		buffer_append(&loginmsg, buf, strlen(buf));
+	}
+	if (actimeleft != 0 && actimeleft < acwarntime) {
+		daysleft = actimeleft / DAY + 1;
+		snprintf(buf, sizeof(buf),
+		    "Your account will expire in %lld day%s.\n",
+		    daysleft, daysleft == 1 ? "" : "s");
+		buffer_append(&loginmsg, buf, strlen(buf));
+	}
+}
+
 int
 sys_auth_passwd(Authctxt *authctxt, const char *password)
 {
 	struct passwd *pw = authctxt->pw;
 	auth_session_t *as;
+	static int expire_checked = 0;
 
 	as = auth_usercheck(pw->pw_name, authctxt->style, "auth-ssh",
 	    (char *)password);
@@ -125,6 +170,10 @@ sys_auth_passwd(Authctxt *authctxt, const char *password)
 		authctxt->force_pwchange = 1;
 		return (1);
 	} else {
+		if (!expire_checked) {
+			expire_checked = 1;
+			warn_expiry(authctxt, as);
+		}
 		return (auth_close(as));
 	}
 }
diff --git a/sshd.c b/sshd.c
index 76aec80b0..7f268526f 100644
--- a/sshd.c
+++ b/sshd.c
@@ -42,7 +42,7 @@
  */
 
 #include "includes.h"
-RCSID("$OpenBSD: sshd.c,v 1.306 2005/01/17 22:48:39 dtucker Exp $");
+RCSID("$OpenBSD: sshd.c,v 1.307 2005/01/21 08:32:02 otto Exp $");
 
 #include <openssl/dh.h>
 #include <openssl/bn.h>
@@ -1664,9 +1664,6 @@ main(int ac, char **av)
 
 	packet_set_nonblocking();
 
-	/* prepare buffers to collect authentication messages */
-	buffer_init(&loginmsg);
-
 	/* allocate authentication context */
 	authctxt = xmalloc(sizeof(*authctxt));
 	memset(authctxt, 0, sizeof(*authctxt));
@@ -1674,13 +1671,13 @@ main(int ac, char **av)
 	/* XXX global for cleanup, access from other modules */
 	the_authctxt = authctxt;
 
+	/* prepare buffer to collect messages to display to user after login */
+	buffer_init(&loginmsg);
+
 	if (use_privsep)
 		if (privsep_preauth(authctxt) == 1)
 			goto authenticated;
 
-	/* prepare buffer to collect messages to display to user after login */
-	buffer_init(&loginmsg);
-
 	/* perform the key exchange */
 	/* authenticate user and start session */
 	if (compat20) {