[openssh-commits] [openssh] 03/04: upstream: randomise the password used in fakepw

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djm pushed a commit to branch master
in repository openssh.

commit 6e0258c64c901753df695e06498b26f9f4812ea6
Author: djm at openbsd.org <djm at openbsd.org>
Date:   Wed Feb 23 11:17:10 2022 +0000

    upstream: randomise the password used in fakepw
    
    OpenBSD-Commit-ID: 34e159f73b1fbf0a924a9c042d8d61edde293947
---
 auth.c | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/auth.c b/auth.c
index 00b168b4..560e8eca 100644
--- a/auth.c
+++ b/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.
  *
@@ -709,12 +709,21 @@ 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)];
 #ifdef HAVE_STRUCT_PASSWD_PW_GECOS
 	fake.pw_gecos = "NOUSER";
 #endif
@@ -725,6 +734,7 @@ fakepw(void)
 #endif
 	fake.pw_dir = "/nonexist";
 	fake.pw_shell = "/nonexist";
+	done = 1;
 
 	return (&fake);
 }

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