randomise the password used in fakepw

diff --git a/usr.bin/ssh/auth.c b/usr.bin/ssh/auth.c
index ba9c1b7..883e4e6 100644 (file)
--- a/usr.bin/ssh/auth.c
+++ b/usr.bin/ssh/auth.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: auth.c,v 1.153 2021/07/05 00:50:25 dtucker Exp $ */
+/* $OpenBSD: auth.c,v 1.154 2022/02/23 11:17:10 djm Exp $ */
 /*
  * Copyright (c) 2000 Markus Friedl.  All rights reserved.
  *
@@ -594,18 +594,28 @@ auth_debug_reset(void)
 struct passwd *
 fakepw(void)
 {
+       static int done = 0;
        static struct passwd fake;
+       const char hashchars[] = "./ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+           "abcdefghijklmnopqrstuvwxyz0123456789"; /* from bcrypt.c */
+       char *cp;
+
+       if (done)
+               return (&fake);
 
        memset(&fake, 0, sizeof(fake));
        fake.pw_name = "NOUSER";
-       fake.pw_passwd =
-           "$2a$06$r3.juUaHZDlIbQaO2dS9FuYxL1W9M81R1Tc92PoSNmzvpEqLkLGrK";
+       fake.pw_passwd = xstrdup("$2a$10$"
+           "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx");
+       for (cp = fake.pw_passwd + 7; *cp != '\0'; cp++)
+               *cp = hashchars[arc4random_uniform(sizeof(hashchars) - 1)];
        fake.pw_gecos = "NOUSER";
        fake.pw_uid = (uid_t)-1;
        fake.pw_gid = (gid_t)-1;
        fake.pw_class = "";
        fake.pw_dir = "/nonexist";
        fake.pw_shell = "/nonexist";
+       done = 1;
 
        return (&fake);
 }