From 4ebb3aace3aa9b73b4f48f56f96d0846f4ea7b84 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Love=20H=C3=B6rnquist=20=C3=85strand?= <lha@kth.se>
Date: Wed, 24 Jan 2007 01:55:32 +0000
Subject: [PATCH] constrain desired_output_len

git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@20056 ec53bebd-3082-4978-b11e-865c3cabbd6b
---
 lib/gssapi/krb5/prf.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/gssapi/krb5/prf.c b/lib/gssapi/krb5/prf.c
index 61c84506b..a2fbb2705 100644
--- a/lib/gssapi/krb5/prf.c
+++ b/lib/gssapi/krb5/prf.c
@@ -57,6 +57,11 @@ _gsskrb5_pseudo_random(OM_uint32 *minor_status,
 	return GSS_S_NO_CONTEXT;
     }
 
+    if (desired_output_len <= 0) {
+	*minor_status = 0;
+	return GSS_S_FAILURE;
+    }
+
     GSSAPI_KRB5_INIT (&context);
 
     switch(prf_key) {