58 lines
1.4 KiB
C++
58 lines
1.4 KiB
C++
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#include "GCrypt/Hasher.h"
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#include "GCrypt/Util.h"
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#include "GCrypt/InitializationVector.h"
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namespace Leonetienne::GCrypt {
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Hasher::Hasher() :
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// Initialize our cipher with a static, but randomly distributed key.
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cipher(
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StringToBitblock("CfRtNdMTP4Y5CWRd"),
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Cipher::CIPHER_DIRECTION::ENCIPHER
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) {
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block = InitializationVector(StringToBitblock("3J7IipfQTDJbO8jtasz9PgWui6faPaEMOuVuAqyhB1S2CRcLw5caawewgDUEG1WN"));
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return;
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}
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void Hasher::Digest(const Block& data) {
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// Encipher the current block, and xor it on the current hashsum
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block ^= cipher.Digest(data);
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return;
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}
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const Block& Hasher::GetHashsum() const {
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return block;
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}
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Block Hasher::CalculateHashsum(const Flexblock& data) {
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// Split input into blocks
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std::vector<Block> blocks;
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for (std::size_t i = 0; i < data.size(); i += BLOCK_SIZE) {
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blocks.push_back(Block(
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PadStringToLength(data.substr(i, BLOCK_SIZE), BLOCK_SIZE, '0', false))
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);
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}
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// Add an additional block, containing the length of the input
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std::stringstream ss;
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ss << data.length();
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const Block lengthBlock = StringToBitblock(ss.str());
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blocks.push_back(lengthBlock);
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// Create hasher instance
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Hasher hasher;
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// Digest all blocks
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for (Block& block : blocks) {
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hasher.Digest(block);
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}
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// Return the total hashsum
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return hasher.GetHashsum();
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}
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}
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