- markus@cvs.openbsd.org 2001/10/03 10:01:20

     [auth.c]
     use realpath() for homedir, too. from jinmei@isl.rdc.toshiba.co.jp

1 files changed, 8 insertions, 3 deletions

diff --git a/auth.c b/auth.c
index 9d4f4abf..096fb32a 100644
--- a/auth.c
+++ b/auth.c
@@ -23,7 +23,7 @@
  */
 
 #include "includes.h"
-RCSID("$OpenBSD: auth.c,v 1.27 2001/07/11 18:26:15 markus Exp $");
+RCSID("$OpenBSD: auth.c,v 1.28 2001/10/03 10:01:20 markus Exp $");
 
 #ifdef HAVE_LOGIN_H
 #include <login.h>
@@ -363,7 +363,7 @@ secure_filename(FILE *f, const char *file, struct passwd *pw,
     char *err, size_t errlen)
 {
 	uid_t uid = pw->pw_uid;
-	char buf[MAXPATHLEN];
+	char buf[MAXPATHLEN], homedir[MAXPATHLEN];
 	char *cp;
 	struct stat st;
 
@@ -372,6 +372,11 @@ secure_filename(FILE *f, const char *file, struct passwd *pw,
 		    strerror(errno));
 		return -1;
 	}
+	if (realpath(pw->pw_dir, homedir) == NULL) {
+		snprintf(err, errlen, "realpath %s failed: %s", pw->pw_dir,
+		    strerror(errno));
+		return -1;
+	}
 
 	/* check the open file to avoid races */
 	if (fstat(fileno(f), &st) < 0 ||
@@ -400,7 +405,7 @@ secure_filename(FILE *f, const char *file, struct passwd *pw,
 		}
 
 		/* If are passed the homedir then we can stop */
-		if (strcmp(pw->pw_dir, buf) == 0) {
+		if (strcmp(homedir, buf) == 0) {
 			debug3("secure_filename: terminating check at '%s'",
 			    buf);
 			break;