From 539364846a89987ac2679988653f50332cb91d26 Mon Sep 17 00:00:00 2001
From: "madmaxoft@gmail.com"
 <madmaxoft@gmail.com@0a769ca7-a7f5-676a-18bf-c427514a06d6>
Date: Thu, 30 Aug 2012 21:06:13 +0000
Subject: Implemented 1.3.2 protocol encryption using CryptoPP, up to Client
 Status packet (http://wiki.vg/Protocol_FAQ step 14)

git-svn-id: http://mc-server.googlecode.com/svn/trunk@808 0a769ca7-a7f5-676a-18bf-c427514a06d6
---
 CryptoPP/ccm.h | 101 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 101 insertions(+)
 create mode 100644 CryptoPP/ccm.h

(limited to 'CryptoPP/ccm.h')

diff --git a/CryptoPP/ccm.h b/CryptoPP/ccm.h
new file mode 100644
index 000000000..2f3c56b45
--- /dev/null
+++ b/CryptoPP/ccm.h
@@ -0,0 +1,101 @@
+#ifndef CRYPTOPP_CCM_H
+#define CRYPTOPP_CCM_H
+
+#include "authenc.h"
+#include "modes.h"
+
+NAMESPACE_BEGIN(CryptoPP)
+
+//! .
+class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE CCM_Base : public AuthenticatedSymmetricCipherBase
+{
+public:
+	CCM_Base()
+		: m_digestSize(0), m_L(0) {}
+
+	// AuthenticatedSymmetricCipher
+	std::string AlgorithmName() const
+		{return GetBlockCipher().AlgorithmName() + std::string("/CCM");}
+	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
+		{return GetBlockCipher().OptimalDataAlignment();}
+	IV_Requirement IVRequirement() const
+		{return UNIQUE_IV;}
+	unsigned int IVSize() const
+		{return 8;}
+	unsigned int MinIVLength() const
+		{return 7;}
+	unsigned int MaxIVLength() const
+		{return 13;}
+	unsigned int DigestSize() const
+		{return m_digestSize;}
+	lword MaxHeaderLength() const
+		{return W64LIT(0)-1;}
+	lword MaxMessageLength() const
+		{return m_L<8 ? (W64LIT(1)<<(8*m_L))-1 : W64LIT(0)-1;}
+	bool NeedsPrespecifiedDataLengths() const
+		{return true;}
+	void UncheckedSpecifyDataLengths(lword headerLength, lword messageLength, lword footerLength);
+
+protected:
+	// AuthenticatedSymmetricCipherBase
+	bool AuthenticationIsOnPlaintext() const
+		{return true;}
+	unsigned int AuthenticationBlockSize() const
+		{return GetBlockCipher().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 int DefaultDigestSize() const =0;
+
+	const BlockCipher & GetBlockCipher() const {return const_cast<CCM_Base *>(this)->AccessBlockCipher();};
+	byte *CBC_Buffer() {return m_buffer+REQUIRED_BLOCKSIZE;}
+
+	enum {REQUIRED_BLOCKSIZE = 16};
+	int m_digestSize, m_L;
+	word64 m_messageLength, m_aadLength;
+	CTR_Mode_ExternalCipher::Encryption m_ctr;
+};
+
+//! .
+template <class T_BlockCipher, int T_DefaultDigestSize, bool T_IsEncryption>
+class CCM_Final : public CCM_Base
+{
+public:
+	static std::string StaticAlgorithmName()
+		{return T_BlockCipher::StaticAlgorithmName() + std::string("/CCM");}
+	bool IsForwardTransformation() const
+		{return T_IsEncryption;}
+
+private:
+	BlockCipher & AccessBlockCipher() {return m_cipher;}
+	int DefaultDigestSize() const {return T_DefaultDigestSize;}
+	typename T_BlockCipher::Encryption m_cipher;
+};
+
+/// <a href="http://www.cryptolounge.org/wiki/CCM">CCM</a>
+template <class T_BlockCipher, int T_DefaultDigestSize = 16>
+struct CCM : public AuthenticatedSymmetricCipherDocumentation
+{
+	typedef CCM_Final<T_BlockCipher, T_DefaultDigestSize, true> Encryption;
+	typedef CCM_Final<T_BlockCipher, T_DefaultDigestSize, false> Decryption;
+};
+
+NAMESPACE_END
+
+#endif
-- 
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