From d69191bb4e93374f9818ab485d1a28fbfc0d1493 Mon Sep 17 00:00:00 2001
From: Ben Lindstrom <mouring@eviladmin.org>
Date: Sat, 17 Mar 2001 23:13:27 +0000
Subject:    - markus@cvs.openbsd.org 2001/03/17 17:27:59      [auth.c]     
 check /etc/shells, too

---
 ChangeLog |  6 +++++-
 auth.c    | 13 +++++++++++--
 2 files changed, 16 insertions(+), 3 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 183a9c629..49aec1dd0 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,6 +1,10 @@
 20010318
  - (bal) Fixed scp type casing issue which causes "scp: protocol error: 
    size not delimited" fatal errors when tranfering.
+ - OpenBSD CVS Sync
+   - markus@cvs.openbsd.org 2001/03/17 17:27:59
+     [auth.c]
+     check /etc/shells, too
 
 20010317
  - Support usrinfo() on AIX. Based on patch from Gert Doering 
@@ -4590,4 +4594,4 @@
  - Wrote replacements for strlcpy and mkdtemp
  - Released 1.0pre1
 
-$Id: ChangeLog,v 1.969 2001/03/17 18:07:46 mouring Exp $
+$Id: ChangeLog,v 1.970 2001/03/17 23:13:27 mouring Exp $
diff --git a/auth.c b/auth.c
index 3e31a448d..14e7f7e71 100644
--- a/auth.c
+++ b/auth.c
@@ -23,7 +23,7 @@
  */
 
 #include "includes.h"
-RCSID("$OpenBSD: auth.c,v 1.19 2001/03/02 18:54:31 deraadt Exp $");
+RCSID("$OpenBSD: auth.c,v 1.20 2001/03/17 17:27:59 markus Exp $");
 
 #ifdef HAVE_LOGIN_H
 #include <login.h>
@@ -57,7 +57,7 @@ int
 allowed_user(struct passwd * pw)
 {
 	struct stat st;
-	char *shell;
+	char *shell, *cp;
 	int i;
 #ifdef WITH_AIXAUTHENTICATE
 	char *loginmsg;
@@ -95,6 +95,15 @@ allowed_user(struct passwd * pw)
 	 */
 	shell = (pw->pw_shell[0] == '\0') ? _PATH_BSHELL : pw->pw_shell;
 
+	/* disallow anyone who does not have a standard shell */
+	setusershell();
+	while ((cp = getusershell()) != NULL)
+		if (strcmp(cp, shell) == 0)
+			break;
+	endusershell();
+	if (cp == NULL)
+		return 0;
+
 	/* deny if shell does not exists or is not executable */
 	if (stat(shell, &st) != 0)
 		return 0;
-- 
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