From 1004b57c55cd51a8ec4b50587a5e0b2d9fffa5ae Mon Sep 17 00:00:00 2001
From: Juan Lang <juan.lang@gmail.com>
Date: Thu, 5 Nov 2009 09:47:49 -0800
Subject: [PATCH] rsaenh: Explicitly clear unused memory when exporting a
 public key.

---
 dlls/rsaenh/implglue.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/dlls/rsaenh/implglue.c b/dlls/rsaenh/implglue.c
index 3477210c4db..118409ffc0e 100644
--- a/dlls/rsaenh/implglue.c
+++ b/dlls/rsaenh/implglue.c
@@ -362,6 +362,9 @@ BOOL export_public_key_impl(BYTE *pbDest, const KEY_CONTEXT *pKeyContext, DWORD
 {
     mp_to_unsigned_bin(&pKeyContext->rsa.N, pbDest);
     reverse_bytes(pbDest, dwKeyLen);
+    if (mp_unsigned_bin_size(&pKeyContext->rsa.N) < dwKeyLen)
+        memset(pbDest + mp_unsigned_bin_size(&pKeyContext->rsa.N), 0,
+               dwKeyLen - mp_unsigned_bin_size(&pKeyContext->rsa.N));
     *pdwPubExp = (DWORD)mp_get_int(&pKeyContext->rsa.e);
     return TRUE;
 }