X-Git-Url: https://git.saurik.com/apple/security.git/blobdiff_plain/5dd5f9ec28f304ca377c42fd7f711d6cf12b90e1..5c19dc3ae3bd8e40a9c028b0deddd50ff337692c:/OSX/libsecurity_apple_csp/lib/NullCryptor.h

diff --git a/OSX/libsecurity_apple_csp/lib/NullCryptor.h b/OSX/libsecurity_apple_csp/lib/NullCryptor.h
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+/*
+ * Copyright (c) 2000-2001,2011,2014 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.
+ */
+
+
+/*
+ * NullCryptor.h - null symmetric encryptor for measurement only
+ */
+#ifndef _NULL_CRYPTOR_H_
+#define _NULL_CRYPTOR_H_
+
+/*
+ * DO NOT DEFINE THIS SYMBOL TRUE FOR CODE CHECKED IN TO CVS
+ */
+#define NULL_CRYPT_ENABLE			0
+
+#if		NULL_CRYPT_ENABLE
+
+#include <security_cdsa_plugin/CSPsession.h>
+#include "AppleCSP.h"
+#include "AppleCSPContext.h"
+#include "AppleCSPSession.h"
+#include "BlockCryptor.h"
+
+#define NULL_CRYPT_BLOCK_SIZE		16
+
+class NullCryptor : public BlockCryptor {
+public:
+	NullCryptor(AppleCSPSession &session) :
+		BlockCryptor(session),
+		mInitFlag(false)	{ }
+	~NullCryptor() { }
+	
+	// called by CSPFullPluginSession
+	void init(const Context &context, bool encoding = true)
+	{
+		if(mInitFlag && !opStarted()) {
+			return;
+		}
+		/* Just have BlockCryptor do its setup */
+		setup(NULL_CRYPT_BLOCK_SIZE, context);
+		mInitFlag = 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)
+	{
+		memmove(cipherText, plainText, NULL_CRYPT_BLOCK_SIZE);
+		cipherTextLen = NULL_CRYPT_BLOCK_SIZE;
+	}
+	
+	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)
+	{
+		memmove(plainText, cipherText, NULL_CRYPT_BLOCK_SIZE);
+		plainTextLen = NULL_CRYPT_BLOCK_SIZE;
+	}
+		
+private:
+	bool				mInitFlag;			// for easy reuse
+
+};	/* NullCryptor */
+
+#endif	/* NULL_CRYPT_ENABLE */
+
+#endif //_NULL_CRYPTOR_H_