From e930551dfa4e0bb97db71d056a4ed59f9e459e01 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Michael=20M=C3=BCller?= <michael@fds-team.de>
Date: Mon, 26 Dec 2016 08:28:24 +0100
Subject: bcrypt: Implement BCryptDuplicateKey.

---
 dlls/bcrypt/bcrypt.spec   |  2 +-
 dlls/bcrypt/bcrypt_main.c | 49 +++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 50 insertions(+), 1 deletion(-)

diff --git a/dlls/bcrypt/bcrypt.spec b/dlls/bcrypt/bcrypt.spec
index 9ecd21d..f5911d2 100644
--- a/dlls/bcrypt/bcrypt.spec
+++ b/dlls/bcrypt/bcrypt.spec
@@ -12,7 +12,7 @@
 @ stdcall BCryptDestroyKey(ptr)
 @ stub BCryptDestroySecret
 @ stdcall BCryptDuplicateHash(ptr ptr ptr long long)
-@ stub BCryptDuplicateKey
+@ stdcall BCryptDuplicateKey(ptr ptr ptr long long)
 @ stdcall BCryptEncrypt(ptr ptr long ptr ptr long ptr long ptr long)
 @ stdcall BCryptEnumAlgorithms(long ptr ptr long)
 @ stub BCryptEnumContextFunctionProviders
diff --git a/dlls/bcrypt/bcrypt_main.c b/dlls/bcrypt/bcrypt_main.c
index 198b010..37d6909 100644
--- a/dlls/bcrypt/bcrypt_main.c
+++ b/dlls/bcrypt/bcrypt_main.c
@@ -915,6 +915,24 @@ static NTSTATUS key_init( struct key *key, struct algorithm *alg, UCHAR *secret,
     return STATUS_SUCCESS;
 }
 
+static NTSTATUS key_duplicate( struct key *key_orig, struct key *key_copy )
+{
+    UCHAR *buffer;
+
+    if (!(buffer = HeapAlloc( GetProcessHeap(), 0, key_orig->secret_len ))) return STATUS_NO_MEMORY;
+    memcpy( buffer, key_orig->secret, key_orig->secret_len );
+
+    key_copy->hdr           = key_orig->hdr;
+    key_copy->alg_id        = key_orig->alg_id;
+    key_copy->mode          = key_orig->mode;
+    key_copy->block_size    = key_orig->block_size;
+    key_copy->handle        = NULL;
+    key_copy->secret        = buffer;
+    key_copy->secret_len    = key_orig->secret_len;
+
+    return STATUS_SUCCESS;
+}
+
 static gnutls_cipher_algorithm_t get_gnutls_cipher( const struct key *key )
 {
     switch (key->alg_id)
@@ -1028,6 +1046,13 @@ static NTSTATUS key_init( struct key *key, struct algorithm *alg, UCHAR *secret,
     return STATUS_NOT_IMPLEMENTED;
 }
 
+static NTSTATUS key_duplicate( struct key *key_orig, struct key *key_copy )
+{
+    ERR( "support for keys not available at build time\n" );
+    key_copy->mode = MODE_ID_CBC;
+    return STATUS_NOT_IMPLEMENTED;
+}
+
 static NTSTATUS key_set_params( struct key *key, UCHAR *iv, ULONG iv_len )
 {
     ERR( "support for keys not available at build time\n" );
@@ -1087,6 +1112,30 @@ NTSTATUS WINAPI BCryptGenerateSymmetricKey( BCRYPT_ALG_HANDLE algorithm, BCRYPT_
     return STATUS_SUCCESS;
 }
 
+NTSTATUS WINAPI BCryptDuplicateKey( BCRYPT_KEY_HANDLE handle, BCRYPT_KEY_HANDLE *handle_copy,
+                                    UCHAR *object, ULONG object_len, ULONG flags )
+{
+    struct key *key_orig = handle;
+    struct key *key_copy;
+    NTSTATUS status;
+
+    TRACE( "%p, %p, %p, %u, %08x\n", handle, handle_copy, object, object_len, flags );
+
+    if (!key_orig || key_orig->hdr.magic != MAGIC_KEY) return STATUS_INVALID_HANDLE;
+    if (!handle_copy) return STATUS_INVALID_PARAMETER;
+    if (!(key_copy = HeapAlloc( GetProcessHeap(), 0, sizeof(*key_copy) )))
+        return STATUS_NO_MEMORY;
+
+    if ((status = key_duplicate( key_orig, key_copy )))
+    {
+        HeapFree( GetProcessHeap(), 0, key_copy );
+        return status;
+    }
+
+    *handle_copy = key_copy;
+    return STATUS_SUCCESS;
+}
+
 NTSTATUS WINAPI BCryptDestroyKey( BCRYPT_KEY_HANDLE handle )
 {
     struct key *key = handle;
-- 
2.9.0