Remove cryptoppwin submodule (#754)

third_party/cryptoppwin/include/cryptopp/emsa2.h

@@ -0,0 +1,101 @@
+// emsa2.h - originally written and placed in the public domain by Wei Dai
+
+/// \file emsa2.h
+/// \brief Classes and functions for various padding schemes used in public key algorithms
+
+#ifndef CRYPTOPP_EMSA2_H
+#define CRYPTOPP_EMSA2_H
+
+#include "cryptlib.h"
+#include "pubkey.h"
+#include "hashfwd.h"
+#include "misc.h"
+
+#ifdef CRYPTOPP_IS_DLL
+# include "sha.h"
+#endif
+
+NAMESPACE_BEGIN(CryptoPP)
+
+/// \brief EMSA2 hash identifier
+/// \tparam H HashTransformation derived class
+/// \since Crypto++ 5.0
+template <class H> class EMSA2HashId
+{
+public:
+	static const byte id;
+};
+
+/// \brief EMSA2 padding method
+/// \tparam BASE Message encoding method
+/// \since Crypto++ 5.0
+template <class BASE>
+class EMSA2HashIdLookup : public BASE
+{
+public:
+	struct HashIdentifierLookup
+	{
+		template <class H> struct HashIdentifierLookup2
+		{
+			static HashIdentifier Lookup()
+			{
+				return HashIdentifier(&EMSA2HashId<H>::id, 1);
+			}
+		};
+	};
+};
+
+// EMSA2HashId can be instantiated with the following classes.
+// SHA1, SHA224, SHA256, SHA384, SHA512, RIPEMD128, RIPEMD160, Whirlpool
+
+#ifdef CRYPTOPP_IS_DLL
+CRYPTOPP_DLL_TEMPLATE_CLASS EMSA2HashId<SHA1>;
+CRYPTOPP_DLL_TEMPLATE_CLASS EMSA2HashId<SHA224>;
+CRYPTOPP_DLL_TEMPLATE_CLASS EMSA2HashId<SHA256>;
+CRYPTOPP_DLL_TEMPLATE_CLASS EMSA2HashId<SHA384>;
+CRYPTOPP_DLL_TEMPLATE_CLASS EMSA2HashId<SHA512>;
+#endif
+
+// https://github.com/weidai11/cryptopp/issues/300 and
+// https://github.com/weidai11/cryptopp/issues/533
+#if defined(__clang__)
+template<> const byte EMSA2HashId<SHA1>::id;
+template<> const byte EMSA2HashId<SHA224>::id;
+template<> const byte EMSA2HashId<SHA256>::id;
+template<> const byte EMSA2HashId<SHA384>::id;
+template<> const byte EMSA2HashId<SHA512>::id;
+#endif
+
+/// \brief EMSA2 padding method
+/// \since Crypto++ 5.0
+class CRYPTOPP_DLL EMSA2Pad : public EMSA2HashIdLookup<PK_DeterministicSignatureMessageEncodingMethod>
+{
+public:
+	CRYPTOPP_STATIC_CONSTEXPR const char* CRYPTOPP_API StaticAlgorithmName() {return "EMSA2";}
+
+	size_t MinRepresentativeBitLength(size_t hashIdentifierLength, size_t digestLength) const
+		{CRYPTOPP_UNUSED(hashIdentifierLength); return 8*digestLength + 31;}
+
+	void ComputeMessageRepresentative(RandomNumberGenerator &rng,
+		const byte *recoverableMessage, size_t recoverableMessageLength,
+		HashTransformation &hash, HashIdentifier hashIdentifier, bool messageEmpty,
+		byte *representative, size_t representativeBitLength) const;
+};
+
+// EMSA2, for use with RWSS and RSA_ISO
+// Only the following hash functions are supported by this signature standard:
+//  \dontinclude emsa2.h
+//  \skip EMSA2HashId can be instantiated
+//  \until end of list
+
+/// \brief EMSA2/P1363 padding method
+/// \details Use with RWSS and RSA_ISO
+/// \since Crypto++ 5.0
+struct P1363_EMSA2 : public SignatureStandard
+{
+	typedef EMSA2Pad SignatureMessageEncodingMethod;
+};
+
+NAMESPACE_END
+
+#endif