From dd6598b834d6e9f113f3c58dd84e778ae5583d4b Mon Sep 17 00:00:00 2001
From: Karsten Elfenbein <kelfe@gmx.de>
Date: Tue, 25 Jul 2006 20:59:12 +0200
Subject: [PATCH] rsaenh: Fix the case when CPGetHashParam should return the
 size of the HASHVAL.

---
 dlls/rsaenh/rsaenh.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/dlls/rsaenh/rsaenh.c b/dlls/rsaenh/rsaenh.c
index 7c9dcfba41c..d42face6e1d 100644
--- a/dlls/rsaenh/rsaenh.c
+++ b/dlls/rsaenh/rsaenh.c
@@ -2567,7 +2567,12 @@ BOOL WINAPI RSAENH_CPGetHashParam(HCRYPTPROV hProv, HCRYPTHASH hHash, DWORD dwPa
                 return tls1_prf(hProv, pCryptHash->hKey, &pCryptHash->tpPRFParams.blobLabel,
                                 &pCryptHash->tpPRFParams.blobSeed, pbData, *pdwDataLen);
             }
-            
+
+            if ( pbData == NULL ) {
+                *pdwDataLen = pCryptHash->dwHashSize;
+                return TRUE;
+            }
+
             if (pCryptHash->dwState == RSAENH_HASHSTATE_IDLE) {
                 SetLastError(NTE_BAD_HASH_STATE);
                 return FALSE;