488 lines
15 KiB
C++
488 lines
15 KiB
C++
// speck.cpp - written and placed in the public domain by Jeffrey Walton
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#include "pch.h"
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#include "config.h"
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#include "speck.h"
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#include "misc.h"
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#include "cpu.h"
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// Uncomment for benchmarking C++ against SSE or NEON.
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// Do so in both speck.cpp and speck_simd.cpp.
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// #undef CRYPTOPP_SSSE3_AVAILABLE
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// #undef CRYPTOPP_SSE41_AVAILABLE
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// #undef CRYPTOPP_ARM_NEON_AVAILABLE
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ANONYMOUS_NAMESPACE_BEGIN
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using CryptoPP::word32;
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using CryptoPP::word64;
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using CryptoPP::rotlConstant;
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using CryptoPP::rotrConstant;
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/// \brief Forward round transformation
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/// \tparam W word type
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/// \details TF83() is the forward round transformation using a=8 and b=3 rotations.
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/// The initial test implementation provided template parameters, but they were
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/// removed because SPECK32 using a=7 and b=2 was not on the road map. The
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/// additional template parameters also made calling SPECK_Encrypt and SPECK_Decrypt
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/// kind of messy.
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template <class W>
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inline void TF83(W& x, W& y, const W k)
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{
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x = rotrConstant<8>(x);
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x += y; x ^= k;
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y = rotlConstant<3>(y);
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y ^= x;
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}
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/// \brief Reverse round transformation
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/// \tparam W word type
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/// \details TR83() is the reverse round transformation using a=8 and b=3 rotations.
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/// The initial test implementation provided template parameters, but they were
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/// removed because SPECK32 using a=7 and b=2 was not on the road map. The
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/// additional template parameters also made calling SPECK_Encrypt and SPECK_Decrypt
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/// kind of messy.
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template <class W>
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inline void TR83(W& x, W& y, const W k)
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{
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y ^= x;
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y = rotrConstant<3>(y);
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x ^= k; x -= y;
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x = rotlConstant<8>(x);
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}
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/// \brief Forward transformation
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/// \tparam W word type
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/// \tparam R number of rounds
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/// \param c output array
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/// \param p input array
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/// \param k subkey array
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template <class W, unsigned int R>
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inline void SPECK_Encrypt(W c[2], const W p[2], const W k[R])
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{
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c[0]=p[0]; c[1]=p[1];
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// Don't unroll this loop. Things slow down.
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for (int i = 0; i < static_cast<int>(R); ++i)
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TF83(c[0], c[1], k[i]);
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}
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/// \brief Reverse transformation
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/// \tparam W word type
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/// \tparam R number of rounds
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/// \param p output array
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/// \param c input array
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/// \param k subkey array
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template <class W, unsigned int R>
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inline void SPECK_Decrypt(W p[2], const W c[2], const W k[R])
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{
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p[0]=c[0]; p[1]=c[1];
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// Don't unroll this loop. Things slow down.
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for (int i = static_cast<int>(R-1); i >= 0; --i)
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TR83(p[0], p[1], k[i]);
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}
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/// \brief Subkey generation function
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/// \details Used when the user key consists of 2 words
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/// \tparam W word type
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/// \tparam R number of rounds
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/// \param key empty subkey array
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/// \param k user key array
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template <class W, unsigned int R>
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inline void SPECK_ExpandKey_2W(W key[R], const W k[2])
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{
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CRYPTOPP_ASSERT(R==32);
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W i=0, B=k[0], A=k[1];
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while (i<R-1)
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{
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key[i]=A; TF83(B, A, i);
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i++;
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}
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key[R-1]=A;
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}
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/// \brief Subkey generation function
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/// \details Used when the user key consists of 3 words
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/// \tparam W word type
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/// \tparam R number of rounds
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/// \param key empty subkey array
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/// \param k user key array
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template <class W, unsigned int R>
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inline void SPECK_ExpandKey_3W(W key[R], const W k[3])
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{
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CRYPTOPP_ASSERT(R==33 || R==26);
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W i=0, C=k[0], B=k[1], A=k[2];
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unsigned int blocks = R/2;
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while (blocks--)
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{
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key[i+0]=A; TF83(B, A, i+0);
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key[i+1]=A; TF83(C, A, i+1);
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i+=2;
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}
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// The constexpr residue should allow the optimizer to remove unneeded statements
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if(R%2 == 1)
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{
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key[R-1]=A;
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}
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}
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/// \brief Subkey generation function
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/// \details Used when the user key consists of 4 words
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/// \tparam W word type
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/// \tparam R number of rounds
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/// \param key empty subkey array
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/// \param k user key array
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template <class W, unsigned int R>
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inline void SPECK_ExpandKey_4W(W key[R], const W k[4])
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{
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CRYPTOPP_ASSERT(R==34 || R==27);
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W i=0, D=k[0], C=k[1], B=k[2], A=k[3];
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unsigned int blocks = R/3;
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while (blocks--)
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{
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key[i+0]=A; TF83(B, A, i+0);
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key[i+1]=A; TF83(C, A, i+1);
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key[i+2]=A; TF83(D, A, i+2);
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i+=3;
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}
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// The constexpr residue should allow the optimizer to remove unneeded statements
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if(R%3 == 1)
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{
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key[R-1]=A;
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}
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else if(R%3 == 2)
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{
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key[R-2]=A; TF83(B, A, W(R-2));
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key[R-1]=A;
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}
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}
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ANONYMOUS_NAMESPACE_END
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///////////////////////////////////////////////////////////
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NAMESPACE_BEGIN(CryptoPP)
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#if (CRYPTOPP_ARM_NEON_AVAILABLE)
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extern size_t SPECK128_Enc_AdvancedProcessBlocks_NEON(const word64* subKeys, size_t rounds,
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const byte *inBlocks, const byte *xorBlocks, byte *outBlocks, size_t length, word32 flags);
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extern size_t SPECK128_Dec_AdvancedProcessBlocks_NEON(const word64* subKeys, size_t rounds,
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const byte *inBlocks, const byte *xorBlocks, byte *outBlocks, size_t length, word32 flags);
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#endif
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#if (CRYPTOPP_SSE41_AVAILABLE)
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extern size_t SPECK64_Enc_AdvancedProcessBlocks_SSE41(const word32* subKeys, size_t rounds,
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const byte *inBlocks, const byte *xorBlocks, byte *outBlocks, size_t length, word32 flags);
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extern size_t SPECK64_Dec_AdvancedProcessBlocks_SSE41(const word32* subKeys, size_t rounds,
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const byte *inBlocks, const byte *xorBlocks, byte *outBlocks, size_t length, word32 flags);
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#endif
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#if (CRYPTOPP_SSSE3_AVAILABLE)
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extern size_t SPECK128_Enc_AdvancedProcessBlocks_SSSE3(const word64* subKeys, size_t rounds,
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const byte *inBlocks, const byte *xorBlocks, byte *outBlocks, size_t length, word32 flags);
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extern size_t SPECK128_Dec_AdvancedProcessBlocks_SSSE3(const word64* subKeys, size_t rounds,
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const byte *inBlocks, const byte *xorBlocks, byte *outBlocks, size_t length, word32 flags);
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#endif
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#if (CRYPTOPP_ALTIVEC_AVAILABLE)
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extern size_t SPECK128_Enc_AdvancedProcessBlocks_ALTIVEC(const word64* subKeys, size_t rounds,
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const byte *inBlocks, const byte *xorBlocks, byte *outBlocks, size_t length, word32 flags);
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extern size_t SPECK128_Dec_AdvancedProcessBlocks_ALTIVEC(const word64* subKeys, size_t rounds,
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const byte *inBlocks, const byte *xorBlocks, byte *outBlocks, size_t length, word32 flags);
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#endif
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std::string SPECK64::Base::AlgorithmProvider() const
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{
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return "C++";
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}
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unsigned int SPECK64::Base::OptimalDataAlignment() const
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{
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return GetAlignmentOf<word32>();
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}
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void SPECK64::Base::UncheckedSetKey(const byte *userKey, unsigned int keyLength, const NameValuePairs ¶ms)
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{
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CRYPTOPP_ASSERT(keyLength == 12 || keyLength == 16);
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CRYPTOPP_UNUSED(params);
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// Building the key schedule table requires {3,4} words workspace.
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// Encrypting and decrypting requires 4 words workspace.
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m_kwords = keyLength/sizeof(word32);
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m_wspace.New(4U);
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// Do the endian gyrations from the paper and align pointers
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typedef GetBlock<word32, LittleEndian> KeyBlock;
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KeyBlock kblk(userKey);
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switch (m_kwords)
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{
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case 3:
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m_rkeys.New((m_rounds = 26));
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kblk(m_wspace[2])(m_wspace[1])(m_wspace[0]);
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SPECK_ExpandKey_3W<word32, 26>(m_rkeys, m_wspace);
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break;
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case 4:
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m_rkeys.New((m_rounds = 27));
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kblk(m_wspace[3])(m_wspace[2])(m_wspace[1])(m_wspace[0]);
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SPECK_ExpandKey_4W<word32, 27>(m_rkeys, m_wspace);
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break;
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default:
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CRYPTOPP_ASSERT(0);
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}
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}
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void SPECK64::Enc::ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const
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{
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// Do the endian gyrations from the paper and align pointers
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typedef GetBlock<word32, LittleEndian> InBlock;
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InBlock iblk(inBlock); iblk(m_wspace[1])(m_wspace[0]);
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switch (m_rounds)
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{
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case 26:
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SPECK_Encrypt<word32, 26>(m_wspace+2, m_wspace+0, m_rkeys);
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break;
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case 27:
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SPECK_Encrypt<word32, 27>(m_wspace+2, m_wspace+0, m_rkeys);
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break;
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default:
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CRYPTOPP_ASSERT(0);
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}
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// Do the endian gyrations from the paper and align pointers
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typedef PutBlock<word32, LittleEndian> OutBlock;
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OutBlock oblk(xorBlock, outBlock); oblk(m_wspace[3])(m_wspace[2]);
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}
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void SPECK64::Dec::ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const
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{
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// Do the endian gyrations from the paper and align pointers
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typedef GetBlock<word32, LittleEndian> InBlock;
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InBlock iblk(inBlock); iblk(m_wspace[1])(m_wspace[0]);
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switch (m_rounds)
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{
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case 26:
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SPECK_Decrypt<word32, 26>(m_wspace+2, m_wspace+0, m_rkeys);
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break;
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case 27:
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SPECK_Decrypt<word32, 27>(m_wspace+2, m_wspace+0, m_rkeys);
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break;
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default:
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CRYPTOPP_ASSERT(0);
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}
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// Do the endian gyrations from the paper and align pointers
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typedef PutBlock<word32, LittleEndian> OutBlock;
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OutBlock oblk(xorBlock, outBlock); oblk(m_wspace[3])(m_wspace[2]);
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}
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///////////////////////////////////////////////////////////
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std::string SPECK128::Base::AlgorithmProvider() const
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{
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#if (CRYPTOPP_SPECK128_ADVANCED_PROCESS_BLOCKS)
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# if (CRYPTOPP_SSSE3_AVAILABLE)
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if (HasSSSE3())
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return "SSSE3";
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# endif
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# if (CRYPTOPP_ARM_NEON_AVAILABLE)
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if (HasNEON())
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return "NEON";
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# endif
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# if (CRYPTOPP_ALTIVEC_AVAILABLE)
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if (HasAltivec())
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return "Altivec";
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# endif
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#endif
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return "C++";
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}
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unsigned int SPECK128::Base::OptimalDataAlignment() const
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{
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#if (CRYPTOPP_SPECK128_ADVANCED_PROCESS_BLOCKS)
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# if (CRYPTOPP_SSSE3_AVAILABLE)
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if (HasSSSE3())
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return 16; // load __m128i
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# endif
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# if (CRYPTOPP_ARM_NEON_AVAILABLE)
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if (HasNEON())
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return 8; // load uint64x2_t
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# endif
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# if (CRYPTOPP_ALTIVEC_AVAILABLE)
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if (HasAltivec())
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return 16; // load uint64x2_p
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# endif
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#endif
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return GetAlignmentOf<word64>();
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}
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void SPECK128::Base::UncheckedSetKey(const byte *userKey, unsigned int keyLength, const NameValuePairs ¶ms)
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{
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CRYPTOPP_ASSERT(keyLength == 16 || keyLength == 24 || keyLength == 32);
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CRYPTOPP_UNUSED(params);
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// Building the key schedule table requires {2,3,4} words workspace.
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// Encrypting and decrypting requires 4 words workspace.
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m_kwords = keyLength/sizeof(word64);
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m_wspace.New(4U);
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// Do the endian gyrations from the paper and align pointers
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typedef GetBlock<word64, LittleEndian> KeyBlock;
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KeyBlock kblk(userKey);
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switch (m_kwords)
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{
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case 2:
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m_rkeys.New((m_rounds = 32));
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kblk(m_wspace[1])(m_wspace[0]);
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SPECK_ExpandKey_2W<word64, 32>(m_rkeys, m_wspace);
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break;
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case 3:
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m_rkeys.New((m_rounds = 33));
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kblk(m_wspace[2])(m_wspace[1])(m_wspace[0]);
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SPECK_ExpandKey_3W<word64, 33>(m_rkeys, m_wspace);
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break;
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case 4:
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m_rkeys.New((m_rounds = 34));
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kblk(m_wspace[3])(m_wspace[2])(m_wspace[1])(m_wspace[0]);
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SPECK_ExpandKey_4W<word64, 34>(m_rkeys, m_wspace);
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break;
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default:
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CRYPTOPP_ASSERT(0);
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}
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#if CRYPTOPP_SPECK128_ADVANCED_PROCESS_BLOCKS
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// Pre-splat the round keys for Altivec forward transformation
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#if CRYPTOPP_ALTIVEC_AVAILABLE
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if (IsForwardTransformation() && HasAltivec())
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{
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AlignedSecBlock presplat(m_rkeys.size()*2);
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for (size_t i=0, j=0; i<m_rkeys.size(); i++, j+=2)
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presplat[j+0] = presplat[j+1] = m_rkeys[i];
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m_rkeys.swap(presplat);
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}
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#elif CRYPTOPP_SSSE3_AVAILABLE
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if (IsForwardTransformation() && HasSSSE3())
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{
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AlignedSecBlock presplat(m_rkeys.size()*2);
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for (size_t i=0, j=0; i<m_rkeys.size(); i++, j+=2)
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presplat[j+0] = presplat[j+1] = m_rkeys[i];
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m_rkeys.swap(presplat);
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}
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#endif
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#endif // CRYPTOPP_SPECK128_ADVANCED_PROCESS_BLOCKS
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}
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void SPECK128::Enc::ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const
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{
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// Do the endian gyrations from the paper and align pointers
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typedef GetBlock<word64, LittleEndian> InBlock;
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InBlock iblk(inBlock); iblk(m_wspace[1])(m_wspace[0]);
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switch (m_rounds)
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{
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case 32:
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SPECK_Encrypt<word64, 32>(m_wspace+2, m_wspace+0, m_rkeys);
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break;
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case 33:
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SPECK_Encrypt<word64, 33>(m_wspace+2, m_wspace+0, m_rkeys);
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break;
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case 34:
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SPECK_Encrypt<word64, 34>(m_wspace+2, m_wspace+0, m_rkeys);
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break;
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default:
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CRYPTOPP_ASSERT(0);
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}
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// Do the endian gyrations from the paper and align pointers
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typedef PutBlock<word64, LittleEndian> OutBlock;
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OutBlock oblk(xorBlock, outBlock); oblk(m_wspace[3])(m_wspace[2]);
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}
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void SPECK128::Dec::ProcessAndXorBlock(const byte *inBlock, const byte *xorBlock, byte *outBlock) const
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{
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// Do the endian gyrations from the paper and align pointers
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typedef GetBlock<word64, LittleEndian> InBlock;
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InBlock iblk(inBlock); iblk(m_wspace[1])(m_wspace[0]);
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switch (m_rounds)
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{
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case 32:
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SPECK_Decrypt<word64, 32>(m_wspace+2, m_wspace+0, m_rkeys);
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break;
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case 33:
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SPECK_Decrypt<word64, 33>(m_wspace+2, m_wspace+0, m_rkeys);
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break;
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case 34:
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SPECK_Decrypt<word64, 34>(m_wspace+2, m_wspace+0, m_rkeys);
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break;
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default:
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CRYPTOPP_ASSERT(0);
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}
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// Do the endian gyrations from the paper and align pointers
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typedef PutBlock<word64, LittleEndian> OutBlock;
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OutBlock oblk(xorBlock, outBlock); oblk(m_wspace[3])(m_wspace[2]);
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}
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#if (CRYPTOPP_SPECK128_ADVANCED_PROCESS_BLOCKS)
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size_t SPECK128::Enc::AdvancedProcessBlocks(const byte *inBlocks, const byte *xorBlocks,
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byte *outBlocks, size_t length, word32 flags) const
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{
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#if (CRYPTOPP_SSSE3_AVAILABLE)
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if (HasSSSE3())
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return SPECK128_Enc_AdvancedProcessBlocks_SSSE3(m_rkeys, (size_t)m_rounds,
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inBlocks, xorBlocks, outBlocks, length, flags);
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#endif
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#if (CRYPTOPP_ARM_NEON_AVAILABLE)
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if (HasNEON())
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return SPECK128_Enc_AdvancedProcessBlocks_NEON(m_rkeys, (size_t)m_rounds,
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inBlocks, xorBlocks, outBlocks, length, flags);
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#endif
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#if (CRYPTOPP_ALTIVEC_AVAILABLE)
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if (HasAltivec())
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return SPECK128_Enc_AdvancedProcessBlocks_ALTIVEC(m_rkeys, (size_t)m_rounds,
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inBlocks, xorBlocks, outBlocks, length, flags);
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#endif
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return BlockTransformation::AdvancedProcessBlocks(inBlocks, xorBlocks, outBlocks, length, flags);
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}
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size_t SPECK128::Dec::AdvancedProcessBlocks(const byte *inBlocks, const byte *xorBlocks,
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byte *outBlocks, size_t length, word32 flags) const
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{
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#if (CRYPTOPP_SSSE3_AVAILABLE)
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if (HasSSSE3())
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return SPECK128_Dec_AdvancedProcessBlocks_SSSE3(m_rkeys, (size_t)m_rounds,
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inBlocks, xorBlocks, outBlocks, length, flags);
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#endif
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#if (CRYPTOPP_ARM_NEON_AVAILABLE)
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if (HasNEON())
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return SPECK128_Dec_AdvancedProcessBlocks_NEON(m_rkeys, (size_t)m_rounds,
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inBlocks, xorBlocks, outBlocks, length, flags);
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#endif
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#if (CRYPTOPP_ALTIVEC_AVAILABLE)
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if (HasAltivec())
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return SPECK128_Dec_AdvancedProcessBlocks_ALTIVEC(m_rkeys, (size_t)m_rounds,
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inBlocks, xorBlocks, outBlocks, length, flags);
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#endif
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return BlockTransformation::AdvancedProcessBlocks(inBlocks, xorBlocks, outBlocks, length, flags);
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}
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#endif // CRYPTOPP_SPECK128_ADVANCED_PROCESS_BLOCKS
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NAMESPACE_END
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