From 9331e2a78e8ec0ba29ed1041a9f851ffd39cc249 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Michael=20M=C3=BCller?= <michael@fds-team.de>
Date: Tue, 20 Dec 2016 03:59:19 +0100
Subject: bcrypt: Implement BCryptDuplicateHash.

FIXME: Should we check for NULL pointers?
---
 dlls/bcrypt/bcrypt.spec   |  2 +-
 dlls/bcrypt/bcrypt_main.c | 18 ++++++++++++++++++
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/dlls/bcrypt/bcrypt.spec b/dlls/bcrypt/bcrypt.spec
index 962953e..9ecd21d 100644
--- a/dlls/bcrypt/bcrypt.spec
+++ b/dlls/bcrypt/bcrypt.spec
@@ -11,7 +11,7 @@
 @ stdcall BCryptDestroyHash(ptr)
 @ stdcall BCryptDestroyKey(ptr)
 @ stub BCryptDestroySecret
-@ stub BCryptDuplicateHash
+@ stdcall BCryptDuplicateHash(ptr ptr ptr long long)
 @ stub BCryptDuplicateKey
 @ stdcall BCryptEncrypt(ptr ptr long ptr ptr long ptr long ptr long)
 @ stdcall BCryptEnumAlgorithms(long ptr ptr long)
diff --git a/dlls/bcrypt/bcrypt_main.c b/dlls/bcrypt/bcrypt_main.c
index 3e2b22d..944a9ea 100644
--- a/dlls/bcrypt/bcrypt_main.c
+++ b/dlls/bcrypt/bcrypt_main.c
@@ -672,6 +672,24 @@ end:
     return STATUS_SUCCESS;
 }
 
+NTSTATUS WINAPI BCryptDuplicateHash( BCRYPT_HASH_HANDLE handle, BCRYPT_HASH_HANDLE *handle_copy,
+                                     UCHAR *object, ULONG object_count, ULONG flags )
+{
+    struct hash *hash_orig = handle;
+    struct hash *hash_copy;
+
+    TRACE( "%p, %p, %p, %u, %u\n", handle, handle_copy, object, object_count, flags );
+
+    if (!hash_orig || hash_orig->hdr.magic != MAGIC_HASH) return STATUS_INVALID_HANDLE;
+    if (!(hash_copy = HeapAlloc( GetProcessHeap(), 0, sizeof(*hash_copy) )))
+        return STATUS_NO_MEMORY;
+
+    memcpy( hash_copy, hash_orig, sizeof(*hash_orig) );
+
+    *handle_copy = hash_copy;
+    return STATUS_SUCCESS;
+}
+
 NTSTATUS WINAPI BCryptDestroyHash( BCRYPT_HASH_HANDLE handle )
 {
     struct hash *hash = handle;
-- 
2.9.0