127 lines
4.0 KiB
C++
127 lines
4.0 KiB
C++
#ifndef GCRYPT_BLOCK_H
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#define GCRYPT_BLOCK_H
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#include <cstdint>
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#include <array>
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#include <string>
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#include <ostream>
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namespace Leonetienne::GCrypt {
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/* This class represents a block of data,
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* and provides functions to manipulate it
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*/
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class Block {
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public:
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//! Will constuct an uninitialized data block
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Block();
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//! Will construct this block from a string like "101010".. Length MUST be 512.
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Block(const std::string& other);
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//! Copy-ctor
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Block(const Block& other);
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~Block();
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//! Will construct this block from a string like "011101..". Length MUST be 512.
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void FromString(const std::string& str);
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//! Will create a bitset-compatible string ("0101110..") representation
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//! of this block. Length will always be 512.
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std::string ToString() const;
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//! Will matrix-multiply two blocks together.
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//! Since the matrices values are pretty much sudo-random,
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//! they will most likely integer-overflow.
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//! So see this as a one-way function.
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Block MMul(const Block& other) const;
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Block operator*(const Block& other) const;
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//! Will matrix-multiply two blocks together,
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//! and directly write into this same block.
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//! Since the matrices values are pretty much sudo-random,
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//! they will most likely integer-overflow.
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//! So see this as a one-way function.
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void MMulInplace(const Block& other);
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Block& operator*=(const Block& other);
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//! Will xor two blocks together
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Block Xor(const Block& other) const;
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//! Will xor two blocks together
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Block operator^(const Block& other) const;
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//! Will xor two blocks together, inplace
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void XorInplace(const Block& other);
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//! Will xor two blocks together, inplace
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Block& operator^=(const Block& other);
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// # TO BE IMPLEMENTED
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//! Will shift rows upwards by n
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void ShiftRowsUp(const std::size_t n);
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// # TO BE IMPLEMENTED
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//! Will shift matrix rows downwards by n
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void ShiftRowsDown(const std::size_t n);
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// # TO BE IMPLEMENTED
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//! Will shift matrix columns to the left by n
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void ShiftColumnsLeft(const std::size_t n);
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// # TO BE IMPLEMENTED
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//! Will shift matrix columns to the right by n
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void ShiftColumnsRight(const std::size_t n);
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// # TO BE IMPLEMENTED
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//! Will shift array cells to the left by n
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void ShiftCellsLeft(const std::size_t n);
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// # TO BE IMPLEMENTED
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//! Will shift array cells to the right by n
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void ShiftCellsRight(const std::size_t n);
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//! Will copy a block
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Block& operator=(const Block& other);
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//! Will compare whether or not two blocks are equal
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bool operator==(const Block& other) const;
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//! Will compare whether or not two blocks are unequal
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bool operator!=(const Block& other) const;
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//! Will zero all data
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void Reset();
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//! Returns 32-bit chunks of data, indexed by matrix coordinates (0-3)
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std::uint32_t& Get(const std::uint8_t row, const std::uint8_t column);
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//! Returns 32-bit chunks of data, indexed by matrix coordinates (0-3)
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const std::uint32_t& Get(const std::uint8_t row, const std::uint8_t column) const;
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//! Returns 32-bit chunks of data, indexed by a 1d-index (0-16)
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std::uint32_t& Get(const std::uint8_t index);
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//! Returns 32-bit chunks of data, indexed by a 1d-index (0-16)
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const std::uint32_t& Get(const std::uint8_t index) const;
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//! Returns 32-bit chunks of data, indexed by a 1d-index (0-16)
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std::uint32_t& operator[](const std::uint8_t index);
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//! Returns 32-bit chunks of data, indexed by a 1d-index (0-16)
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const std::uint32_t& operator[](const std::uint8_t index) const;
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static constexpr std::size_t CHUNK_SIZE = sizeof(std::uint32_t);
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static constexpr std::size_t CHUNK_SIZE_BITS = CHUNK_SIZE * 8;
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friend std::ostream& operator<<(std::ostream& os, const Block& b);
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private:
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std::array<std::uint32_t, 16> data;
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};
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}
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#endif
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