Juan Lang : rsaenh: Explicitly clear unused memory when exporting a public key.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 1004b57c55cd51a8ec4b50587a5e0b2d9fffa5ae
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=1004b57c55cd51a8ec4b50587a5e0b2d9fffa5ae

Author: Juan Lang <juan.lang at gmail.com>
Date:   Thu Nov  5 09:47:49 2009 -0800

rsaenh: Explicitly clear unused memory when exporting a public key.

---

 dlls/rsaenh/implglue.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/dlls/rsaenh/implglue.c b/dlls/rsaenh/implglue.c
index 3477210..118409f 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;
 }