- 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@

1 files changed, 50 insertions, 1 deletions

diff --git a/auth-passwd.c b/auth-passwd.c
index 7a68e056..2e5fbc73 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));
 	}
 }