# HG changeset patch
# User Matt Johnston <matt@ucc.asn.au>
# Date 1495642180 -28800
# Node ID bc9e2e148f58e7b0bfa0f5c28b141f7263050816
# Parent  dd5d7b7141b99b2ed4319fa38657f2434c6d4715
avoid NULL argument to base64 decode

diff -r dd5d7b7141b9 -r bc9e2e148f58 signkey.c
--- a/signkey.c	Tue May 23 22:43:52 2017 +0800
+++ b/signkey.c	Thu May 25 00:09:40 2017 +0800
@@ -577,6 +577,10 @@
 
 	/* now we have the actual data */
 	len = line->len - line->pos;
+	if (len == 0) {
+		/* base64_decode doesn't like NULL argument */
+		return DROPBEAR_FAILURE;
+	}
 	decodekeylen = len * 2; /* big to be safe */
 	decodekey = buf_new(decodekeylen);