X-Git-Url: https://git.saurik.com/apple/security.git/blobdiff_plain/80e2389990082500d76eb566d4946be3e786c3ef..d8f41ccd20de16f8ebe2ccc84d47bf1cb2b26bbb:/Security/libsecurity_transform/lib/EncryptTransform.h

diff --git a/Security/libsecurity_transform/lib/EncryptTransform.h b/Security/libsecurity_transform/lib/EncryptTransform.h
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+/*
+ * Copyright (c) 2010-2011 Apple Inc. All Rights Reserved.
+ * 
+ * @APPLE_LICENSE_HEADER_START@
+ * 
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ * 
+ * The 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.
+ * 
+ * @APPLE_LICENSE_HEADER_END@
+ */
+
+/*!
+ @header EncryptTransform
+ Provide the implementation class for the Encryption and Decryption 
+ transforms
+ 
+ */
+
+#if !defined(__ENCRYPT_TRANSFORM__)
+#define __ENCRYPT_TRANSFORM__ 1
+
+#include <CommonCrypto/CommonCryptor.h>
+#include <CoreFoundation/CoreFoundation.h>
+#include <Security/cssmapi.h>
+#include <Security/cssmapple.h>
+#include <Security/cssmtype.h>
+#include <Security/SecKey.h>
+#include "Transform.h"
+#include "TransformFactory.h"
+
+
+class EncryptDecryptBase : public Transform
+{
+protected:
+	CSSM_PADDING			m_cssm_padding;
+	CSSM_ENCRYPT_MODE		m_mode;
+	CSSM_KEY_PTR			m_cssm_key;			// The cssm key from the reference key
+	CSSM_CC_HANDLE			m_handle;			// The context for this key either encrypt or decrypt
+	Boolean					m_forEncryption;
+	Boolean					m_oaep_padding;
+	CFMutableDataRef		m_processedData;
+	// for "single chunk" modes or paddings (i.e. OAEP) m_accumulator accumulates all the raw cleartext until EOS.
+	CFMutableDataRef		m_accumulator;
+    SecTransformAttributeRef inputAH;
+	
+	// Used to serialize CDSA setup operations for encrypt/decrypt on a given key 
+	static dispatch_once_t	serializerSetUp;
+	static dispatch_queue_t		serializerTransformStartingExecution;
+	
+	virtual void			Finalize();
+	virtual Boolean 		TransformCanExecute();
+	virtual CFErrorRef 		TransformStartingExecution();
+	CFErrorRef				SerializedTransformStartingExecution();
+	virtual void 			AttributeChanged(SecTransformAttributeRef ah, CFTypeRef value);
+	
+	CFDataRef				apply_oaep_padding(CFDataRef value);
+	CFDataRef				remove_oaep_padding(CFDataRef value);
+	
+	EncryptDecryptBase(CFStringRef type);
+	
+	virtual 				~EncryptDecryptBase();
+	
+	void					SendCSSMError(CSSM_RETURN error);
+
+public:
+	// overload to return a CFDictionary that contains the state of your transform.  Values returned should be
+	// serializable.  Remember that this state will be restored before SecTransformExecute is called.  Do not
+	// include the transform name in your state (this will be done for you by SecTransformCopyExternalRepresentation).
+	virtual CFDictionaryRef CopyState();
+	
+	// overload to restore the state of your transform
+	virtual void 			RestoreState(CFDictionaryRef state);
+	
+	// your own routines
+	virtual bool 			InitializeObject(SecKeyRef key, CFErrorRef *error);
+	
+	
+};
+
+
+class EncryptTransform : public EncryptDecryptBase
+{
+protected:
+	
+public:
+	
+	static TransformFactory* MakeTransformFactory();
+	
+public:
+	
+protected:
+	EncryptTransform() ;
+	
+public:
+	virtual 				~EncryptTransform();
+	static SecTransformRef 	Make();
+};
+
+
+
+class DecryptTransform : public EncryptDecryptBase
+{
+protected:
+	
+public:
+	
+	static TransformFactory* MakeTransformFactory();
+	
+public:
+	
+protected:
+	DecryptTransform();
+	
+public:
+	virtual 				~DecryptTransform();
+	static SecTransformRef 	Make();
+};
+
+
+#endif /* !__ENCRYPT_TRANSFORM__ */