changes for 5.6:

    - added AuthenticatedSymmetricCipher interface class and Filter wrappers
    - added CCM, GCM (with SSE2 assembly), CMAC, and SEED
    - improved AES speed on x86 and x64
    - removed WORD64_AVAILABLE; compiler 64-bit int support is now required

git-svn-id: svn://svn.code.sf.net/p/cryptopp/code/trunk/c5@433 57ff6487-cd31-0410-9ec3-f628ee90f5f0

1 files changed, 105 insertions, 0 deletions

diff --git a/gcm.h b/gcm.h
new file mode 100644
index 0000000..6be06d4
--- /dev/null
+++ b/gcm.h
@@ -0,0 +1,105 @@
+#ifndef CRYPTOPP_GCM_H

+#define CRYPTOPP_GCM_H

+

+#include "authenc.h"

+#include "modes.h"

+

+NAMESPACE_BEGIN(CryptoPP)

+

+//! .

+enum GCM_TablesOption {GCM_2K_Tables, GCM_64K_Tables};

+

+//! .

+class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE GCM_Base : public AuthenticatedSymmetricCipherBase

+{

+public:

+	// AuthenticatedSymmetricCipher

+	std::string AlgorithmName() const

+		{return GetBlockCipher().AlgorithmName() + std::string("/GCM");}

+	size_t MinKeyLength() const

+		{return GetBlockCipher().MinKeyLength();}

+	size_t MaxKeyLength() const

+		{return GetBlockCipher().MaxKeyLength();}

+	size_t DefaultKeyLength() const

+		{return GetBlockCipher().DefaultKeyLength();}

+	size_t GetValidKeyLength(size_t n) const

+		{return GetBlockCipher().GetValidKeyLength(n);}

+	bool IsValidKeyLength(size_t n) const

+		{return GetBlockCipher().IsValidKeyLength(n);}

+	unsigned int OptimalDataAlignment() const;

+	IV_Requirement IVRequirement() const

+		{return UNIQUE_IV;}

+	unsigned int IVSize() const

+		{return 12;}

+	unsigned int MinIVLength() const

+		{return 1;}

+	unsigned int MaxIVLength() const

+		{return UINT_MAX;}		// (W64LIT(1)<<61)-1 in the standard

+	unsigned int DigestSize(void) const

+		{return 16;}

+	lword MaxHeaderLength() const

+		{return (W64LIT(1)<<61)-1;}

+	lword MaxMessageLength() const

+		{return ((W64LIT(1)<<39)-256)/8;}

+

+protected:

+	// AuthenticatedSymmetricCipherBase

+	bool AuthenticationIsOnPlaintext() const

+		{return false;}

+	unsigned int AuthenticationBlockSize() const

+		{return HASH_BLOCKSIZE;}

+	void SetKeyWithoutResync(const byte *userKey, size_t keylength, const NameValuePairs &params);

+	void Resync(const byte *iv, size_t len);

+	size_t AuthenticateBlocks(const byte *data, size_t len);

+	void AuthenticateLastHeaderBlock();

+	void AuthenticateLastConfidentialBlock();

+	void AuthenticateLastFooterBlock(byte *mac, size_t macSize);

+	SymmetricCipher & AccessSymmetricCipher() {return m_ctr;}

+

+	virtual BlockCipher & AccessBlockCipher() =0;

+	virtual GCM_TablesOption GetTablesOption() const =0;

+

+	const BlockCipher & GetBlockCipher() const {return const_cast<GCM_Base *>(this)->AccessBlockCipher();};

+	byte *HashBuffer() {return m_buffer+REQUIRED_BLOCKSIZE;}

+	byte *HashKey() {return m_buffer+2*REQUIRED_BLOCKSIZE;}

+	byte *MulTable() {return m_buffer+3*REQUIRED_BLOCKSIZE;}

+

+	class GCTR : public CTR_Mode_ExternalCipher::Encryption

+	{

+	protected:

+		void IncrementCounterBy256();

+	};

+

+	GCTR m_ctr;

+	static word16 s_reductionTable[256];

+	static bool s_reductionTableInitialized;

+	enum {REQUIRED_BLOCKSIZE = 16, HASH_BLOCKSIZE = 16};

+};

+

+//! .

+template <class T_BlockCipher, GCM_TablesOption T_TablesOption, bool T_IsEncryption>

+class GCM_Final : public GCM_Base

+{

+public:

+	static std::string StaticAlgorithmName()

+		{return T_BlockCipher::StaticAlgorithmName() + std::string("/GCM");}

+	bool IsForwardTransformation() const

+		{return T_IsEncryption;}

+

+private:

+	GCM_TablesOption GetTablesOption() const {return T_TablesOption;}

+	BlockCipher & AccessBlockCipher() {return m_cipher;}

+	typename T_BlockCipher::Encryption m_cipher;

+};

+

+//! <a href="http://www.cryptolounge.org/wiki/GCM">GCM</a>

+template <class T_BlockCipher, GCM_TablesOption T_TablesOption=GCM_2K_Tables>

+struct GCM : public AuthenticatedSymmetricCipherDocumentation

+{

+	typedef GCM_Final<T_BlockCipher, T_TablesOption, true> Encryption;

+	typedef GCM_Final<T_BlockCipher, T_TablesOption, false> Decryption;

+};

+

+NAMESPACE_END

+

+#endif