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https://github.com/shadps4-emu/ext-cryptopp.git
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134 lines
4.4 KiB
C++
134 lines
4.4 KiB
C++
#ifndef CRYPTOPP_ITERHASH_H
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#define CRYPTOPP_ITERHASH_H
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#include "cryptlib.h"
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#include "secblock.h"
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#include "misc.h"
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#include "simple.h"
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NAMESPACE_BEGIN(CryptoPP)
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template <class T, class BASE>
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class CRYPTOPP_NO_VTABLE IteratedHashBase : public BASE
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{
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public:
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typedef T HashWordType;
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IteratedHashBase() : m_countHi(0), m_countLo(0) {}
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void SetBlockSize(unsigned int blockSize) {m_data.resize(blockSize / sizeof(HashWordType));}
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void SetStateSize(unsigned int stateSize) {m_digest.resize(stateSize / sizeof(HashWordType));}
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unsigned int BlockSize() const {return m_data.size() * sizeof(T);}
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unsigned int OptimalBlockSize() const {return BlockSize();}
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unsigned int OptimalDataAlignment() const {return sizeof(T);}
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void Update(const byte *input, unsigned int length);
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byte * CreateUpdateSpace(unsigned int &size);
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void Restart();
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protected:
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T GetBitCountHi() const {return (m_countLo >> (8*sizeof(T)-3)) + (m_countHi << 3);}
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T GetBitCountLo() const {return m_countLo << 3;}
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virtual unsigned int HashMultipleBlocks(const T *input, unsigned int length);
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void PadLastBlock(unsigned int lastBlockSize, byte padFirst=0x80);
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virtual void Init() =0;
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virtual void HashBlock(const T *input) =0;
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SecBlock<T> m_data; // Data buffer
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SecBlock<T> m_digest; // Message digest
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private:
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T m_countLo, m_countHi;
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};
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#ifdef WORD64_AVAILABLE
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CRYPTOPP_STATIC_TEMPLATE_CLASS IteratedHashBase<word64, HashTransformation>;
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CRYPTOPP_STATIC_TEMPLATE_CLASS IteratedHashBase<word64, MessageAuthenticationCode>;
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#endif
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CRYPTOPP_DLL_TEMPLATE_CLASS IteratedHashBase<word32, HashTransformation>;
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CRYPTOPP_STATIC_TEMPLATE_CLASS IteratedHashBase<word32, MessageAuthenticationCode>;
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//! .
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template <class T, class B, class BASE>
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class CRYPTOPP_NO_VTABLE IteratedHashBase2 : public IteratedHashBase<T, BASE>
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{
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public:
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typedef B ByteOrderClass;
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typedef typename IteratedHashBase<T, BASE>::HashWordType HashWordType;
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inline static void CorrectEndianess(HashWordType *out, const HashWordType *in, unsigned int byteCount)
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{
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ConditionalByteReverse(B::ToEnum(), out, in, byteCount);
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}
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void TruncatedFinal(byte *digest, unsigned int size);
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protected:
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void HashBlock(const HashWordType *input);
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virtual void HashEndianCorrectedBlock(const HashWordType *data) =0;
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};
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//! .
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template <class T_HashWordType, class T_Endianness, unsigned int T_BlockSize, class T_Base = HashTransformation>
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class CRYPTOPP_NO_VTABLE IteratedHash : public IteratedHashBase2<T_HashWordType, T_Endianness, T_Base>
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{
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public:
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enum {BLOCKSIZE = T_BlockSize};
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CRYPTOPP_COMPILE_ASSERT((BLOCKSIZE & (BLOCKSIZE - 1)) == 0); // blockSize is a power of 2
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protected:
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IteratedHash() {this->SetBlockSize(T_BlockSize);}
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};
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template <class T_HashWordType, class T_Endianness, unsigned int T_BlockSize, unsigned int T_StateSize, class T_Transform, unsigned int T_DigestSize = T_StateSize>
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class CRYPTOPP_NO_VTABLE IteratedHashWithStaticTransform
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: public ClonableImpl<T_Transform, AlgorithmImpl<IteratedHash<T_HashWordType, T_Endianness, T_BlockSize>, T_Transform> >
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{
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public:
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enum {DIGESTSIZE = T_DigestSize};
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unsigned int DigestSize() const {return DIGESTSIZE;};
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protected:
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IteratedHashWithStaticTransform()
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{
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this->SetStateSize(T_StateSize);
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Init();
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}
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void HashEndianCorrectedBlock(const T_HashWordType *data) {T_Transform::Transform(this->m_digest, data);}
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void Init() {T_Transform::InitState(this->m_digest);}
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};
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// *************************************************************
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template <class T, class B, class BASE> void IteratedHashBase2<T, B, BASE>::TruncatedFinal(byte *digest, unsigned int size)
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{
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this->ThrowIfInvalidTruncatedSize(size);
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PadLastBlock(this->BlockSize() - 2*sizeof(HashWordType));
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CorrectEndianess(this->m_data, this->m_data, this->BlockSize() - 2*sizeof(HashWordType));
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this->m_data[this->m_data.size()-2] = B::ToEnum() ? this->GetBitCountHi() : this->GetBitCountLo();
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this->m_data[this->m_data.size()-1] = B::ToEnum() ? this->GetBitCountLo() : this->GetBitCountHi();
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HashEndianCorrectedBlock(this->m_data);
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CorrectEndianess(this->m_digest, this->m_digest, this->DigestSize());
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memcpy(digest, this->m_digest, size);
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this->Restart(); // reinit for next use
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}
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template <class T, class B, class BASE> void IteratedHashBase2<T, B, BASE>::HashBlock(const HashWordType *input)
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{
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if (NativeByteOrderIs(B::ToEnum()))
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HashEndianCorrectedBlock(input);
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else
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{
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ByteReverse(this->m_data.begin(), input, this->BlockSize());
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HashEndianCorrectedBlock(this->m_data);
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}
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}
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NAMESPACE_END
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#endif
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