Security-57031.1.35.tar.gz

[apple/security.git] / Security / libsecurity_apple_csp / lib / desContext.h

diff --git a/Security/libsecurity_apple_csp/lib/desContext.h b/Security/libsecurity_apple_csp/lib/desContext.h
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+/*
+ * Copyright (c) 2000-2001,2011,2013-2014 Apple Inc. All Rights Reserved.
+ * 
+ * The contents of this file constitute Original Code as defined in and are
+ * subject to the Apple Public Source License Version 1.2 (the 'License').
+ * You may not use this file except in compliance with the License. Please obtain
+ * a copy of the License at http://www.apple.com/publicsource and read it before
+ * using this file.
+ * 
+ * This Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS
+ * OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, INCLUDING WITHOUT
+ * LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
+ * PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. Please see the License for the
+ * specific language governing rights and limitations under the License.
+ */
+
+
+/*
+ * desContext.h - glue between BlockCrytpor and DES/3DES implementations
+ */
+#ifndef _DES_CONTEXT_H_
+#define _DES_CONTEXT_H_
+
+#include <security_cdsa_plugin/CSPsession.h>
+#include "AppleCSP.h"
+#include "AppleCSPContext.h"
+#include "AppleCSPSession.h"
+#include "BlockCryptor.h"
+#include <CommonCrypto/CommonCryptor.h>
+#include <CommonCrypto/CommonCryptorSPI.h>
+
+#define DES_KEY_SIZE_BITS_EXTERNAL             (kCCKeySizeDES * 8)
+#define DES_BLOCK_SIZE_BYTES                   kCCBlockSizeDES
+
+/* DES Symmetric encryption context */
+class DESContext : public BlockCryptor {
+public:
+       DESContext(AppleCSPSession &session);
+       virtual ~DESContext();
+       
+       // called by CSPFullPluginSession
+       void init(const Context &context, bool encoding = true);
+
+       // called by BlockCryptor
+       void encryptBlock(
+               const void              *plainText,                     // length implied (one block)
+               size_t                  plainTextLen,
+               void                    *cipherText,    
+               size_t                  &cipherTextLen,         // in/out, throws on overflow
+               bool                    final);
+       void decryptBlock(
+               const void              *cipherText,            // length implied (one cipher block)
+               size_t                  cipherTextLen,
+               void                    *plainText,     
+               size_t                  &plainTextLen,          // in/out, throws on overflow
+               bool                    final);
+       
+private:
+        CCCryptorRef   DesInst;        
+};     /* DESContext */
+
+/* Triple-DES (EDE, 24 byte key) Symmetric encryption context */
+
+#define DES3_KEY_SIZE_BYTES            (3 * (DES_KEY_SIZE_BITS_EXTERNAL / 8))
+#define DES3_BLOCK_SIZE_BYTES  kCCBlockSize3DES
+
+class DES3Context : public BlockCryptor {
+public:
+       DES3Context(AppleCSPSession &session);
+       ~DES3Context();
+       
+       // called by CSPFullPluginSession
+       void init(const Context &context, bool encoding = true);
+
+       // called by BlockCryptor
+       void encryptBlock(
+               const void              *plainText,                     // length implied (one block)
+               size_t                  plainTextLen,
+               void                    *cipherText,    
+               size_t                  &cipherTextLen,         // in/out, throws on overflow
+               bool                    final);
+       void decryptBlock(
+               const void              *cipherText,            // length implied (one cipher block)
+               size_t                  cipherTextLen,
+               void                    *plainText,     
+               size_t                  &plainTextLen,          // in/out, throws on overflow
+               bool                    final);
+       
+private:
+    CCCryptorRef       DesInst;                
+};     /* DES3Context */
+
+#endif //_DES_CONTEXT_H_