Remove cryptoppwin submodule (#754)

third_party/cryptoppwin/include/cryptopp/sm4.h

@@ -0,0 +1,96 @@
+// sm4.h - written and placed in the public domain by Jeffrey Walton and Han Lulu
+
+/// \file sm4.h
+/// \brief Classes for the SM4 block cipher
+/// \details SM4 is a block cipher designed by Xiaoyun Wang, et al. The block cipher is part of the
+///   Chinese State Cryptography Administration portfolio. The cipher was formerly known as SMS4.
+/// \details SM4 encryption is accelerated on machines with AES-NI. Decryption is not accelerated because
+///   it is not profitable. Thanks to Markku-Juhani Olavi Saarinen for help and the code.
+/// \sa <A HREF="http://eprint.iacr.org/2008/329.pdf">SMS4 Encryption Algorithm for Wireless Networks</A>,
+///   <A HREF="http://github.com/guanzhi/GmSSL">Reference implementation using OpenSSL</A> and
+///   <A HREF="https://github.com/mjosaarinen/sm4ni">Markku-Juhani Olavi Saarinen GitHub</A>.
+/// \since Crypto++ 6.0
+
+#ifndef CRYPTOPP_SM4_H
+#define CRYPTOPP_SM4_H
+
+#include "config.h"
+#include "seckey.h"
+#include "secblock.h"
+
+#if (CRYPTOPP_BOOL_X64 || CRYPTOPP_BOOL_X32 || CRYPTOPP_BOOL_X86)
+# ifndef CRYPTOPP_DISABLE_SM4_SIMD
+#  define CRYPTOPP_SM4_ADVANCED_PROCESS_BLOCKS 1
+# endif
+#endif
+
+NAMESPACE_BEGIN(CryptoPP)
+
+/// \brief SM4 block cipher information
+/// \since Crypto++ 6.0
+struct SM4_Info : public FixedBlockSize<16>, FixedKeyLength<16>
+{
+    static const std::string StaticAlgorithmName()
+    {
+        return "SM4";
+    }
+};
+
+/// \brief Classes for the SM4 block cipher
+/// \details SM4 is a block cipher designed by Xiaoyun Wang, et al. The block cipher is part of the
+///   Chinese State Cryptography Administration portfolio. The cipher was formerly known as SMS4.
+/// \sa <A HREF="http://eprint.iacr.org/2008/329.pdf">SMS4 Encryption Algorithm for Wireless Networks</A>
+/// \since Crypto++ 6.0
+class CRYPTOPP_NO_VTABLE SM4 : public SM4_Info, public BlockCipherDocumentation
+{
+public:
+    /// \brief SM4 block cipher transformation functions
+    /// \details Provides implementation common to encryption and decryption
+    /// \since Crypto++ 6.0
+    class CRYPTOPP_NO_VTABLE Base : public BlockCipherImpl<SM4_Info>
+    {
+    protected:
+        void UncheckedSetKey(const byte *userKey, unsigned int keyLength, const NameValuePairs &params);
+
+        SecBlock<word32, AllocatorWithCleanup<word32> > m_rkeys;
+        mutable SecBlock<word32, AllocatorWithCleanup<word32> > m_wspace;
+    };
+
+    /// \brief Encryption transformation
+    /// \details Enc provides implementation for encryption transformation. All key
+    ///   sizes are supported.
+    /// \details SM4 encryption is accelerated on machines with AES-NI. Decryption is
+    ///   not accelerated because it is not profitable. Thanks to Markku-Juhani Olavi
+    ///   Saarinen.
+    /// \since Crypto++ 6.0, AESNI encryption since Crypto++ 8.0
+    class CRYPTOPP_NO_VTABLE Enc : public Base
+    {
+    public:
+        std::string AlgorithmProvider() const;
+    protected:
+        void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
+#if CRYPTOPP_SM4_ADVANCED_PROCESS_BLOCKS
+        size_t AdvancedProcessBlocks(const byte *inBlocks, const byte *xorBlocks, byte *outBlocks, size_t length, word32 flags) const;
+#endif
+    };
+
+    /// \brief Decryption transformation
+    /// \details Dec provides implementation for decryption transformation. All key
+    ///   sizes are supported.
+    /// \details SM4 encryption is accelerated on machines with AES-NI. Decryption is
+    ///   not accelerated because it is not profitable. Thanks to Markku-Juhani Olavi
+    ///   Saarinen.
+    /// \since Crypto++ 6.0
+    class CRYPTOPP_NO_VTABLE Dec : public Base
+    {
+    protected:
+        void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
+    };
+
+    typedef BlockCipherFinal<ENCRYPTION, Enc> Encryption;
+    typedef BlockCipherFinal<DECRYPTION, Dec> Decryption;
+};
+
+NAMESPACE_END
+
+#endif // CRYPTOPP_SM4_H