506 lines
17 KiB
C++
506 lines
17 KiB
C++
// simon.h - 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 "simon.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 simon.cpp and simon_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 Round transformation helper
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/// \tparam W word type
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/// \param v value
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template <class W>
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inline W f(const W v)
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{
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return (rotlConstant<1>(v) & rotlConstant<8>(v)) ^ rotlConstant<2>(v);
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}
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/// \brief Round transformation
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/// \tparam W word type
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/// \param x value
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/// \param y value
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/// \param k value
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/// \param l value
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template <class W>
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inline void R2(W& x, W& y, const W k, const W l)
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{
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y ^= f(x); y ^= k;
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x ^= f(y); x ^= l;
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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 SIMON_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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for (int i = 0; i < static_cast<int>(R-1); i += 2)
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R2(c[0], c[1], k[i], k[i + 1]);
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if (R & 1)
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{
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c[1] ^= f(c[0]); c[1] ^= k[R-1];
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W t = c[0]; c[0] = c[1]; c[1] = t;
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}
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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 SIMON_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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unsigned int rounds = R;
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if (R & 1)
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{
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const W t = p[1]; p[1] = p[0]; p[0] = t;
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p[1] ^= k[R - 1]; p[1] ^= f(p[0]);
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rounds--;
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}
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for (int i = static_cast<int>(rounds - 2); i >= 0; i -= 2)
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R2(p[1], p[0], k[i + 1], k[i]);
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}
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/// \brief Subkey generation function
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/// \details Used for SIMON-64 with 96-bit key and 42 rounds. A template was
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/// not worthwhile because all instantiations would need specialization.
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/// \param key empty subkey array
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/// \param k user key array
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inline void SIMON64_ExpandKey_3W(word32 key[42], const word32 k[3])
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{
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const word32 c = 0xfffffffc;
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word64 z = W64LIT(0x7369f885192c0ef5);
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key[0] = k[2]; key[1] = k[1]; key[2] = k[0];
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for (size_t i = 3; i<42; ++i)
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{
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key[i] = static_cast<word32>(c ^ (z & 1) ^ key[i - 3] ^
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rotrConstant<3>(key[i - 1]) ^ rotrConstant<4>(key[i - 1]));
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z >>= 1;
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}
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}
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/// \brief Subkey generation function
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/// \details Used for SIMON-64 with 128-bit key and 44 rounds. A template was
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/// not worthwhile because all instantiations would need specialization.
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/// \param key empty subkey array
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/// \param k user key array
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inline void SIMON64_ExpandKey_4W(word32 key[44], const word32 k[4])
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{
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const word32 c = 0xfffffffc;
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word64 z = W64LIT(0xfc2ce51207a635db);
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key[0] = k[3]; key[1] = k[2]; key[2] = k[1]; key[3] = k[0];
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for (size_t i = 4; i<44; ++i)
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{
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key[i] = static_cast<word32>(c ^ (z & 1) ^ key[i - 4] ^
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rotrConstant<3>(key[i - 1]) ^ key[i - 3] ^ rotrConstant<4>(key[i - 1]) ^
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rotrConstant<1>(key[i - 3]));
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z >>= 1;
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}
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}
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/// \brief Subkey generation function
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/// \details Used for SIMON-128 with 128-bit key and 68 rounds. A template was
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/// not worthwhile because all instantiations would need specialization.
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/// \param key empty subkey array
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/// \param k user key array
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inline void SIMON128_ExpandKey_2W(word64 key[68], const word64 k[2])
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{
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const word64 c = W64LIT(0xfffffffffffffffc);
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word64 z = W64LIT(0x7369f885192c0ef5);
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key[0] = k[1]; key[1] = k[0];
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for (size_t i=2; i<66; ++i)
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{
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key[i] = c ^ (z & 1) ^ key[i - 2] ^ rotrConstant<3>(key[i - 1]) ^ rotrConstant<4>(key[i - 1]);
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z>>=1;
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}
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key[66] = c ^ 1 ^ key[64] ^ rotrConstant<3>(key[65]) ^ rotrConstant<4>(key[65]);
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key[67] = c^key[65] ^ rotrConstant<3>(key[66]) ^ rotrConstant<4>(key[66]);
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}
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/// \brief Subkey generation function
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/// \details Used for SIMON-128 with 192-bit key and 69 rounds. A template was
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/// not worthwhile because all instantiations would need specialization.
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/// \param key empty subkey array
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/// \param k user key array
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inline void SIMON128_ExpandKey_3W(word64 key[69], const word64 k[3])
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{
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const word64 c = W64LIT(0xfffffffffffffffc);
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word64 z = W64LIT(0xfc2ce51207a635db);
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key[0]=k[2]; key[1]=k[1]; key[2]=k[0];
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for (size_t i=3; i<67; ++i)
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{
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key[i] = c ^ (z & 1) ^ key[i - 3] ^ rotrConstant<3>(key[i - 1]) ^ rotrConstant<4>(key[i - 1]);
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z>>=1;
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}
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key[67] = c^key[64] ^ rotrConstant<3>(key[66]) ^ rotrConstant<4>(key[66]);
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key[68] = c ^ 1 ^ key[65] ^ rotrConstant<3>(key[67]) ^ rotrConstant<4>(key[67]);
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}
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/// \brief Subkey generation function
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/// \details Used for SIMON-128 with 256-bit key and 72 rounds. A template was
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/// not worthwhile because all instantiations would need specialization.
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/// \param key empty subkey array
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/// \param k user key array
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inline void SIMON128_ExpandKey_4W(word64 key[72], const word64 k[4])
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{
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const word64 c = W64LIT(0xfffffffffffffffc);
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word64 z = W64LIT(0xfdc94c3a046d678b);
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key[0]=k[3]; key[1]=k[2]; key[2]=k[1]; key[3]=k[0];
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for (size_t i=4; i<68; ++i)
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{
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key[i] = c ^ (z & 1) ^ key[i - 4] ^ rotrConstant<3>(key[i - 1]) ^ key[i - 3] ^ rotrConstant<4>(key[i - 1]) ^ rotrConstant<1>(key[i - 3]);
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z>>=1;
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}
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key[68] = c^key[64] ^ rotrConstant<3>(key[67]) ^ key[65] ^ rotrConstant<4>(key[67]) ^ rotrConstant<1>(key[65]);
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key[69] = c ^ 1 ^ key[65] ^ rotrConstant<3>(key[68]) ^ key[66] ^ rotrConstant<4>(key[68]) ^ rotrConstant<1>(key[66]);
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key[70] = c^key[66] ^ rotrConstant<3>(key[69]) ^ key[67] ^ rotrConstant<4>(key[69]) ^ rotrConstant<1>(key[67]);
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key[71] = c^key[67] ^ rotrConstant<3>(key[70]) ^ key[68] ^ rotrConstant<4>(key[70]) ^ rotrConstant<1>(key[68]);
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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 SIMON128_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 SIMON128_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_SSSE3_AVAILABLE)
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extern size_t SIMON128_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 SIMON128_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 SIMON128_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 SIMON128_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 SIMON64::Base::AlgorithmProvider() const
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{
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return "C++";
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}
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unsigned int SIMON64::Base::OptimalDataAlignment() const
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{
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return GetAlignmentOf<word32>();
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}
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void SIMON64::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 = 42));
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kblk(m_wspace[2])(m_wspace[1])(m_wspace[0]);
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SIMON64_ExpandKey_3W(m_rkeys, m_wspace);
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break;
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case 4:
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m_rkeys.New((m_rounds = 44));
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kblk(m_wspace[3])(m_wspace[2])(m_wspace[1])(m_wspace[0]);
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SIMON64_ExpandKey_4W(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 SIMON64::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 42:
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SIMON_Encrypt<word32, 42>(m_wspace+2, m_wspace+0, m_rkeys);
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break;
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case 44:
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SIMON_Encrypt<word32, 44>(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 SIMON64::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 42:
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SIMON_Decrypt<word32, 42>(m_wspace+2, m_wspace+0, m_rkeys);
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break;
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case 44:
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SIMON_Decrypt<word32, 44>(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 SIMON128::Base::AlgorithmProvider() const
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{
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#if (CRYPTOPP_SIMON128_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 SIMON128::Base::OptimalDataAlignment() const
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{
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#if (CRYPTOPP_SIMON128_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 SIMON128::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 = 68));
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kblk(m_wspace[1])(m_wspace[0]);
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SIMON128_ExpandKey_2W(m_rkeys, m_wspace);
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break;
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case 3:
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m_rkeys.New((m_rounds = 69));
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kblk(m_wspace[2])(m_wspace[1])(m_wspace[0]);
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SIMON128_ExpandKey_3W(m_rkeys, m_wspace);
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break;
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case 4:
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m_rkeys.New((m_rounds = 72));
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kblk(m_wspace[3])(m_wspace[2])(m_wspace[1])(m_wspace[0]);
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SIMON128_ExpandKey_4W(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_SIMON128_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_SIMON128_ADVANCED_PROCESS_BLOCKS
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}
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void SIMON128::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 68:
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SIMON_Encrypt<word64, 68>(m_wspace+2, m_wspace+0, m_rkeys);
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break;
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case 69:
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SIMON_Encrypt<word64, 69>(m_wspace+2, m_wspace+0, m_rkeys);
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break;
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case 72:
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SIMON_Encrypt<word64, 72>(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 SIMON128::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 68:
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SIMON_Decrypt<word64, 68>(m_wspace+2, m_wspace+0, m_rkeys);
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break;
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case 69:
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SIMON_Decrypt<word64, 69>(m_wspace+2, m_wspace+0, m_rkeys);
|
|
break;
|
|
case 72:
|
|
SIMON_Decrypt<word64, 72>(m_wspace+2, m_wspace+0, m_rkeys);
|
|
break;
|
|
default:
|
|
CRYPTOPP_ASSERT(0);
|
|
}
|
|
|
|
// Do the endian gyrations from the paper and align pointers
|
|
typedef PutBlock<word64, LittleEndian> OutBlock;
|
|
OutBlock oblk(xorBlock, outBlock); oblk(m_wspace[3])(m_wspace[2]);
|
|
}
|
|
|
|
#if (CRYPTOPP_SIMON128_ADVANCED_PROCESS_BLOCKS)
|
|
size_t SIMON128::Enc::AdvancedProcessBlocks(const byte *inBlocks, const byte *xorBlocks,
|
|
byte *outBlocks, size_t length, word32 flags) const
|
|
{
|
|
#if (CRYPTOPP_SSSE3_AVAILABLE)
|
|
if (HasSSSE3())
|
|
return SIMON128_Enc_AdvancedProcessBlocks_SSSE3(m_rkeys, (size_t)m_rounds,
|
|
inBlocks, xorBlocks, outBlocks, length, flags);
|
|
#endif
|
|
#if (CRYPTOPP_ARM_NEON_AVAILABLE)
|
|
if (HasNEON())
|
|
return SIMON128_Enc_AdvancedProcessBlocks_NEON(m_rkeys, (size_t)m_rounds,
|
|
inBlocks, xorBlocks, outBlocks, length, flags);
|
|
#endif
|
|
#if (CRYPTOPP_ALTIVEC_AVAILABLE)
|
|
if (HasAltivec())
|
|
return SIMON128_Enc_AdvancedProcessBlocks_ALTIVEC(m_rkeys, (size_t)m_rounds,
|
|
inBlocks, xorBlocks, outBlocks, length, flags);
|
|
#endif
|
|
return BlockTransformation::AdvancedProcessBlocks(inBlocks, xorBlocks, outBlocks, length, flags);
|
|
}
|
|
|
|
size_t SIMON128::Dec::AdvancedProcessBlocks(const byte *inBlocks, const byte *xorBlocks,
|
|
byte *outBlocks, size_t length, word32 flags) const
|
|
{
|
|
#if (CRYPTOPP_SSSE3_AVAILABLE)
|
|
if (HasSSSE3())
|
|
return SIMON128_Dec_AdvancedProcessBlocks_SSSE3(m_rkeys, (size_t)m_rounds,
|
|
inBlocks, xorBlocks, outBlocks, length, flags);
|
|
#endif
|
|
#if (CRYPTOPP_ARM_NEON_AVAILABLE)
|
|
if (HasNEON())
|
|
return SIMON128_Dec_AdvancedProcessBlocks_NEON(m_rkeys, (size_t)m_rounds,
|
|
inBlocks, xorBlocks, outBlocks, length, flags);
|
|
#endif
|
|
#if (CRYPTOPP_ALTIVEC_AVAILABLE)
|
|
if (HasAltivec())
|
|
return SIMON128_Dec_AdvancedProcessBlocks_ALTIVEC(m_rkeys, (size_t)m_rounds,
|
|
inBlocks, xorBlocks, outBlocks, length, flags);
|
|
#endif
|
|
return BlockTransformation::AdvancedProcessBlocks(inBlocks, xorBlocks, outBlocks, length, flags);
|
|
}
|
|
#endif // CRYPTOPP_SIMON128_ADVANCED_PROCESS_BLOCKS
|
|
|
|
NAMESPACE_END
|