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| author | Jeffrey Walton <noloader@gmail.com> | 2018-06-17 23:24:47 -0400 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2018-06-17 23:24:47 -0400 |
| commit | 54d510034426b383f4cd1d3d15db818184093791 (patch) | |
| tree | 7df3f5713bd9686a645a59e8812a4fc1577014a9 /cham.h | |
| parent | 30b2de26f4b987a2555b6f55c185937ac835b269 (diff) | |
| download | cryptopp-git-54d510034426b383f4cd1d3d15db818184093791.tar.gz | |
Add CHAM lightweight block cipher (PR #670)
Add CHAM lightweight block cipher
Diffstat (limited to 'cham.h')
| -rw-r--r-- | cham.h | 144 |
1 files changed, 144 insertions, 0 deletions
@@ -0,0 +1,144 @@ +// cham.h - written and placed in the public domain by Kim Sung Hee and Jeffrey Walton
+// Based on "CHAM: A Family of Lightweight Block Ciphers for
+// Resource-Constrained Devices" by Bonwook Koo, Dongyoung Roh,
+// Hyeonjin Kim, Younghoon Jung, Dong-Geon Lee, and Daesung Kwon
+
+/// \file cham.h
+/// \brief Classes for the CHAM block cipher
+/// \since Crypto++ 7.1
+
+#ifndef CRYPTOPP_CHAM_H
+#define CRYPTOPP_CHAM_H
+
+#include "config.h"
+#include "seckey.h"
+#include "secblock.h"
+#include "algparam.h"
+
+NAMESPACE_BEGIN(CryptoPP)
+
+/// \brief CHAM block cipher information
+/// \since Crypto++ 7.1
+struct CHAM64_Info : public FixedBlockSize<8>, FixedKeyLength<16>
+{
+ static const std::string StaticAlgorithmName()
+ {
+ // Format is Cipher-Blocksize
+ return "CHAM-64";
+ }
+};
+
+/// \brief CHAM block cipher information
+/// \since Crypto++ 7.1
+struct CHAM128_Info : public FixedBlockSize<16>, VariableKeyLength<16,16,32,16>
+{
+ static const std::string StaticAlgorithmName()
+ {
+ // Format is Cipher-Blocksize
+ return "CHAM-128";
+ }
+};
+
+/// \brief CHAM 64-bit block cipher
+/// \details CHAM64 provides 64-bit block size. The valid key size is 128-bit.
+/// \note Crypto++ provides a byte oriented implementation
+/// \sa CHAM128, <a href="http://www.cryptopp.com/wiki/CHAM">CHAM</a>, <a href=
+/// "https://pdfs.semanticscholar.org/2f57/61b5c2614cffd58a09cc83c375a2b32a2ed3.pdf">
+/// CHAM: A Family of Lightweight Block Ciphers for Resource-Constrained Devices</a>
+/// \since Crypto++ 7.1
+class CRYPTOPP_NO_VTABLE CHAM64 : public CHAM64_Info, public BlockCipherDocumentation
+{
+public:
+ /// \brief CHAM block cipher transformation functions
+ /// \details Provides implementation common to encryption and decryption
+ /// \since Crypto++ 7.1
+ class CRYPTOPP_NO_VTABLE Base : public BlockCipherImpl<CHAM64_Info>
+ {
+ protected:
+ void UncheckedSetKey(const byte *userKey, unsigned int keyLength, const NameValuePairs ¶ms);
+
+ SecBlock<word16> m_rk;
+ mutable FixedSizeSecBlock<word16, 4> m_x;
+ unsigned int m_kw;
+ };
+
+ /// \brief Provides implementation for encryption transformation
+ /// \details Enc provides implementation for encryption transformation. All key and block
+ /// sizes are supported.
+ /// \since Crypto++ 7.1
+ class CRYPTOPP_NO_VTABLE Enc : public Base
+ {
+ public:
+ void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
+ };
+
+ /// \brief Provides implementation for encryption transformation
+ /// \details Dec provides implementation for decryption transformation. All key and block
+ /// sizes are supported.
+ /// \since Crypto++ 7.1
+ class CRYPTOPP_NO_VTABLE Dec : public Base
+ {
+ public:
+ void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
+ };
+
+ typedef BlockCipherFinal<ENCRYPTION, Enc> Encryption;
+ typedef BlockCipherFinal<DECRYPTION, Dec> Decryption;
+};
+
+typedef CHAM64::Encryption CHAM64Encryption;
+typedef CHAM64::Decryption CHAM64Decryption;
+
+/// \brief CHAM 128-bit block cipher
+/// \details CHAM128 provides 128-bit block size. The valid key size is 128-bit and 256-bit.
+/// \note Crypto++ provides a byte oriented implementation
+/// \sa CHAM128, <a href="http://www.cryptopp.com/wiki/CHAM">CHAM</a>, <a href=
+/// "https://pdfs.semanticscholar.org/2f57/61b5c2614cffd58a09cc83c375a2b32a2ed3.pdf">
+/// CHAM: A Family of Lightweight Block Ciphers for Resource-Constrained Devices</a>
+/// \since Crypto++ 7.1
+class CRYPTOPP_NO_VTABLE CHAM128 : public CHAM128_Info, public BlockCipherDocumentation
+{
+public:
+ /// \brief CHAM block cipher transformation functions
+ /// \details Provides implementation common to encryption and decryption
+ /// \since Crypto++ 7.1
+ class CRYPTOPP_NO_VTABLE Base : public BlockCipherImpl<CHAM128_Info>
+ {
+ protected:
+ void UncheckedSetKey(const byte *userKey, unsigned int keyLength, const NameValuePairs ¶ms);
+
+ SecBlock<word32> m_rk;
+ mutable FixedSizeSecBlock<word32, 4> m_x;
+ unsigned int m_kw;
+ };
+
+ /// \brief Provides implementation for encryption transformation
+ /// \details Enc provides implementation for encryption transformation. All key and block
+ /// sizes are supported.
+ /// \since Crypto++ 7.1
+ class CRYPTOPP_NO_VTABLE Enc : public Base
+ {
+ public:
+ void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
+ };
+
+ /// \brief Provides implementation for encryption transformation
+ /// \details Dec provides implementation for decryption transformation. All key and block
+ /// sizes are supported.
+ /// \since Crypto++ 7.1
+ class CRYPTOPP_NO_VTABLE Dec : public Base
+ {
+ public:
+ void ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const;
+ };
+
+ typedef BlockCipherFinal<ENCRYPTION, Enc> Encryption;
+ typedef BlockCipherFinal<DECRYPTION, Dec> Decryption;
+};
+
+typedef CHAM128::Encryption CHAM128Encryption;
+typedef CHAM128::Decryption CHAM128Decryption;
+
+NAMESPACE_END
+
+#endif // CRYPTOPP_CHAM_H
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