mirror of
https://github.com/shadps4-emu/ext-cryptopp.git
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147 lines
3.5 KiB
C++
147 lines
3.5 KiB
C++
// panama.cpp - written and placed in the public domain by Wei Dai
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#include "pch.h"
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#include "panama.h"
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#include "misc.h"
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NAMESPACE_BEGIN(CryptoPP)
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template <class B>
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void Panama<B>::Reset()
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{
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m_bstart = 0;
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memset(m_state, 0, m_state.size()*4);
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}
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template <class B>
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void Panama<B>::Iterate(size_t count, const word32 *p, word32 *z, const word32 *y)
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{
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unsigned int bstart = m_bstart;
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word32 *const a = m_state;
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#define c (a+17)
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#define b ((Stage *)(a+34))
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// output
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#define OA(i) z[i] = ConditionalByteReverse(B::ToEnum(), a[i+9])
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#define OX(i) z[i] = y[i] ^ ConditionalByteReverse(B::ToEnum(), a[i+9])
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// buffer update
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#define US(i) {word32 t=b0[i]; b0[i]=ConditionalByteReverse(B::ToEnum(), p[i])^t; b25[(i+6)%8]^=t;}
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#define UL(i) {word32 t=b0[i]; b0[i]=a[i+1]^t; b25[(i+6)%8]^=t;}
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// gamma and pi
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#define GP(i) c[5*i%17] = rotlFixed(a[i] ^ (a[(i+1)%17] | ~a[(i+2)%17]), ((5*i%17)*((5*i%17)+1)/2)%32)
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// theta and sigma
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#define T(i,x) a[i] = c[i] ^ c[(i+1)%17] ^ c[(i+4)%17] ^ x
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#define TS1S(i) T(i+1, ConditionalByteReverse(B::ToEnum(), p[i]))
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#define TS1L(i) T(i+1, b4[i])
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#define TS2(i) T(i+9, b16[i])
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while (count--)
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{
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if (z)
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{
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if (y)
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{
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OX(0); OX(1); OX(2); OX(3); OX(4); OX(5); OX(6); OX(7);
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y += 8;
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}
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else
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{
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OA(0); OA(1); OA(2); OA(3); OA(4); OA(5); OA(6); OA(7);
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}
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z += 8;
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}
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word32 *const b16 = b[(bstart+16) % STAGES];
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word32 *const b4 = b[(bstart+4) % STAGES];
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bstart = (bstart + STAGES - 1) % STAGES;
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word32 *const b0 = b[bstart];
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word32 *const b25 = b[(bstart+25) % STAGES];
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if (p)
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{
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US(0); US(1); US(2); US(3); US(4); US(5); US(6); US(7);
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}
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else
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{
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UL(0); UL(1); UL(2); UL(3); UL(4); UL(5); UL(6); UL(7);
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}
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GP(0); GP(1); GP(2); GP(3); GP(4); GP(5); GP(6); GP(7);
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GP(8); GP(9); GP(10); GP(11); GP(12); GP(13); GP(14); GP(15); GP(16);
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T(0,1);
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if (p)
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{
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TS1S(0); TS1S(1); TS1S(2); TS1S(3); TS1S(4); TS1S(5); TS1S(6); TS1S(7);
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p += 8;
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}
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else
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{
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TS1L(0); TS1L(1); TS1L(2); TS1L(3); TS1L(4); TS1L(5); TS1L(6); TS1L(7);
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}
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TS2(0); TS2(1); TS2(2); TS2(3); TS2(4); TS2(5); TS2(6); TS2(7);
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}
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m_bstart = bstart;
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}
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template <class B>
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size_t PanamaHash<B>::HashMultipleBlocks(const word32 *input, size_t length)
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{
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this->Iterate(length / this->BLOCKSIZE, input);
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return length % this->BLOCKSIZE;
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}
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template <class B>
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void PanamaHash<B>::TruncatedFinal(byte *hash, size_t size)
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{
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this->ThrowIfInvalidTruncatedSize(size);
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PadLastBlock(this->BLOCKSIZE, 0x01);
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HashEndianCorrectedBlock(this->m_data);
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this->Iterate(32); // pull
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ConditionalByteReverse(B::ToEnum(), this->m_state+9, this->m_state+9, DIGESTSIZE);
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memcpy(hash, this->m_state+9, size);
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this->Restart(); // reinit for next use
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}
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template <class B>
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void PanamaCipherPolicy<B>::CipherSetKey(const NameValuePairs ¶ms, const byte *key, size_t length)
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{
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FixedSizeSecBlock<word32, 8> buf;
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this->Reset();
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memcpy(buf, key, 32);
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this->Iterate(1, buf);
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if (length == 64)
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memcpy(buf, key+32, 32);
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else
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memset(buf, 0, 32);
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this->Iterate(1, buf);
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this->Iterate(32);
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}
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template <class B>
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void PanamaCipherPolicy<B>::OperateKeystream(KeystreamOperation operation, byte *output, const byte *input, size_t iterationCount)
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{
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this->Iterate(iterationCount, NULL, (word32 *)output, (const word32 *)input);
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}
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template class Panama<BigEndian>;
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template class Panama<LittleEndian>;
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template class PanamaHash<BigEndian>;
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template class PanamaHash<LittleEndian>;
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template class PanamaCipherPolicy<BigEndian>;
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template class PanamaCipherPolicy<LittleEndian>;
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NAMESPACE_END
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