X-Git-Url: https://git.saurik.com/apple/security.git/blobdiff_plain/80e2389990082500d76eb566d4946be3e786c3ef..d8f41ccd20de16f8ebe2ccc84d47bf1cb2b26bbb:/Security/libsecurity_apple_csp/lib/FEEAsymmetricContext.h?ds=inline

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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.
+ */
+
+
+/*
+ * FEEAsymmetricContext.h - CSPContexts for FEE asymmetric encryption
+ *
+ */
+
+#ifdef	CRYPTKIT_CSP_ENABLE
+
+#ifndef _FEE_ASYMMETRIC_CONTEXT_H_
+#define _FEE_ASYMMETRIC_CONTEXT_H_
+
+#include <security_cdsa_plugin/CSPsession.h>
+#include "AppleCSP.h"
+#include "AppleCSPContext.h"
+#include "AppleCSPSession.h"
+#include "BlockCryptor.h"
+#include <security_cryptkit/feeFEED.h>
+#include <security_cryptkit/feeFEEDExp.h>
+
+namespace CryptKit {
+
+class FEEDContext : public BlockCryptor {
+public:
+	FEEDContext(AppleCSPSession &session) :
+		BlockCryptor(session),
+		mFeeFeed(NULL),
+		mPrivKey(NULL),
+		mPubKey(NULL),
+		mInitFlag(false) 	{ }
+	~FEEDContext();
+	
+	/* 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);
+	
+	/*
+ 	 * Additional query size support, necessary because we don't conform to 
+	 * BlockCryptor's standard one-to-one block scheme
+	 */
+ 	size_t inputSize(
+		size_t 			outSize);			// input for given output size
+	size_t outputSize(
+		bool 			final = false, 
+		size_t 			inSize = 0); 		// output for given input size
+	void minimumProgress(
+		size_t 			&in, 
+		size_t 			&out); 				// minimum progress chunks
+
+
+private:
+		feeFEED			mFeeFeed;
+		feePubKey		mPrivKey;
+		bool			mAllocdPrivKey;
+		feePubKey		mPubKey;
+		bool			mAllocdPubKey;
+		bool			mInitFlag;			// allows easy reuse
+};	/* FEEDContext */
+
+
+class FEEDExpContext : public BlockCryptor {
+public:
+	FEEDExpContext(AppleCSPSession &session) :
+		BlockCryptor(session),
+		mFeeFeedExp(NULL),
+		mFeeKey(NULL),
+		mInitFlag(false) 	{ }
+
+	~FEEDExpContext();
+	
+	/* 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:
+		feeFEEDExp		mFeeFeedExp;
+		feePubKey		mFeeKey;
+		bool			mAllocdFeeKey;
+		bool			mInitFlag;			// allows easy reuse
+};	/* FEEDExpContext */
+
+/*
+ * Elliptic curve Diffie-Hellman key exchange. The public key is 
+ * specified in one of two ways - a raw X9.62 format public key 
+ * string in Param, or a CSSM_KEY in the Context. 
+ * Requested size, in keyData->Length, must be the same size as
+ * the keys' modulus. Data is returned in keyData->Data, which is 
+ * allocated by the caller.
+ * Optionally performs X9.63 key derivation if algId == 
+ * CSSM_ALGID_ECDH_X963_KDF, with the optional SharedInfo passed
+ * as optional context attribute CSSM_ATTRIBUTE_SALT.
+ */
+extern void DeriveKey_ECDH (
+	const Context &context,
+	CSSM_ALGORITHMS algId,		
+	const CssmData &Param,
+	CSSM_DATA *keyData,
+	AppleCSPSession &session);
+
+} /* namespace CryptKit */
+
+#endif 	/* _FEE_ASYMMETRIC_CONTEXT_H_ */
+#endif	/* CRYPTKIT_CSP_ENABLE */