Remove cryptoppwin submodule (#754)

third_party/cryptoppwin/include/cryptopp/authenc.h

@@ -0,0 +1,87 @@
+// authenc.h - originally written and placed in the public domain by Wei Dai
+
+/// \file
+/// \brief Classes for authenticated encryption modes of operation
+/// \details Authenticated encryption (AE) schemes combine confidentiality and authenticity
+///   into a single mode of operation They gained traction in the early 2000's because manually
+///   combining them was error prone for the typical developer. Around that time, the desire to
+///   authenticate but not ecrypt additional data (AAD) was also identified. When both features
+///   are available from a scheme, the system is referred to as an AEAD scheme.
+/// \details Crypto++ provides four authenticated encryption modes of operation - CCM, EAX, GCM
+///   and OCB mode. All modes derive from AuthenticatedSymmetricCipherBase() and the
+///   motivation for the API, like calling AAD a "header", can be found in Bellare,
+///   Rogaway and Wagner's <A HREF="http://web.cs.ucdavis.edu/~rogaway/papers/eax.pdf">The EAX
+///   Mode of Operation</A>. The EAX paper suggested a basic API to help standardize AEAD
+///   schemes in software and promote adoption of the modes.
+/// \sa <A HREF="http://www.cryptopp.com/wiki/Authenticated_Encryption">Authenticated
+///   Encryption</A> on the Crypto++ wiki.
+/// \since Crypto++ 5.6.0
+
+#ifndef CRYPTOPP_AUTHENC_H
+#define CRYPTOPP_AUTHENC_H
+
+#include "cryptlib.h"
+#include "secblock.h"
+
+NAMESPACE_BEGIN(CryptoPP)
+
+/// \brief Base class for authenticated encryption modes of operation
+/// \details AuthenticatedSymmetricCipherBase() serves as a base implementation for one direction
+///   (encryption or decryption) of a stream cipher or block cipher mode with authentication.
+/// \details Crypto++ provides four authenticated encryption modes of operation - CCM, EAX, GCM
+///   and OCB mode. All modes derive from AuthenticatedSymmetricCipherBase() and the
+///   motivation for the API, like calling AAD a &quot;header&quot;, can be found in Bellare,
+///   Rogaway and Wagner's <A HREF="http://web.cs.ucdavis.edu/~rogaway/papers/eax.pdf">The EAX
+///   Mode of Operation</A>. The EAX paper suggested a basic API to help standardize AEAD
+///   schemes in software and promote adoption of the modes.
+/// \sa <A HREF="http://www.cryptopp.com/wiki/Authenticated_Encryption">Authenticated
+///   Encryption</A> on the Crypto++ wiki.
+/// \since Crypto++ 5.6.0
+class CRYPTOPP_DLL CRYPTOPP_NO_VTABLE AuthenticatedSymmetricCipherBase : public AuthenticatedSymmetricCipher
+{
+public:
+	AuthenticatedSymmetricCipherBase() : m_totalHeaderLength(0), m_totalMessageLength(0),
+		m_totalFooterLength(0), m_bufferedDataLength(0), m_state(State_Start) {}
+
+	// StreamTransformation interface
+	bool IsRandomAccess() const {return false;}
+	bool IsSelfInverting() const {return true;}
+
+	void SetKey(const byte *userKey, size_t keylength, const NameValuePairs &params);
+	void Restart() {if (m_state > State_KeySet) m_state = State_KeySet;}
+	void Resynchronize(const byte *iv, int length=-1);
+	void Update(const byte *input, size_t length);
+	void ProcessData(byte *outString, const byte *inString, size_t length);
+	void TruncatedFinal(byte *mac, size_t macSize);
+
+protected:
+	void UncheckedSetKey(const byte * key, unsigned int length,const CryptoPP::NameValuePairs &params)
+		{CRYPTOPP_UNUSED(key), CRYPTOPP_UNUSED(length), CRYPTOPP_UNUSED(params); CRYPTOPP_ASSERT(false);}
+
+	void AuthenticateData(const byte *data, size_t len);
+	const SymmetricCipher & GetSymmetricCipher() const
+		{return const_cast<AuthenticatedSymmetricCipherBase *>(this)->AccessSymmetricCipher();}
+
+	virtual SymmetricCipher & AccessSymmetricCipher() =0;
+	virtual bool AuthenticationIsOnPlaintext() const =0;
+	virtual unsigned int AuthenticationBlockSize() const =0;
+	virtual void SetKeyWithoutResync(const byte *userKey, size_t keylength, const NameValuePairs &params) =0;
+	virtual void Resync(const byte *iv, size_t len) =0;
+	virtual size_t AuthenticateBlocks(const byte *data, size_t len) =0;
+	virtual void AuthenticateLastHeaderBlock() =0;
+	virtual void AuthenticateLastConfidentialBlock() {}
+	virtual void AuthenticateLastFooterBlock(byte *mac, size_t macSize) =0;
+
+	// State_AuthUntransformed: authentication is applied to plain text (Authenticate-then-Encrypt)
+	// State_AuthTransformed: authentication is applied to cipher text (Encrypt-then-Authenticate)
+	enum State {State_Start, State_KeySet, State_IVSet, State_AuthUntransformed, State_AuthTransformed, State_AuthFooter};
+
+	AlignedSecByteBlock m_buffer;
+	lword m_totalHeaderLength, m_totalMessageLength, m_totalFooterLength;
+	unsigned int m_bufferedDataLength;
+	State m_state;
+};
+
+NAMESPACE_END
+
+#endif