117 lines
4.0 KiB
C++
117 lines
4.0 KiB
C++
//#
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//# Copyright (C) 2018-2019 QuasarApp.
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//# Distributed under the lgplv3 software license, see the accompanying
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//# Everyone is permitted to copy and distribute verbatim copies
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//# of this license document, but changing it is not allowed.
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//#
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#ifndef QRSAENCRYPTION_H
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#define QRSAENCRYPTION_H
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#include <QByteArray>
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#include <QList>
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#include <QFile>
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#include <cmath>
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#include <QDebug>
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#include <QCryptographicHash> // to use sha256
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#include "./../qtsecret_global.h"
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#include <bigint.h>
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class Qt_SECRETSHARED_EXPORT QRSAEncryption
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{
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public:
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typedef BigInt INT;
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typedef QCryptographicHash::Algorithm HashAlgorithm;
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enum Rsa {
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Invalid = 0,
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RSA_64 = 64,
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RSA_128 = 128,
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RSA_256 = 256,
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RSA_512 = 512,
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RSA_1024 = 1024,
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RSA_2048 = 2048,
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RSA_4096 = 4096,
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RSA_8192 = 8192,
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};
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enum BlockSize {
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Auto = 0, // fast but not stable. (using by default)
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OneByte = 1 // stable but slow. (using for sig and check sig messages)
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};
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QRSAEncryption(Rsa rsa = Rsa::RSA_256);
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// static methods
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// OLDMETHODS DELETE IN next Version
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static bool generatePairKeyS(QByteArray &pubKey, QByteArray &privKey,
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QRSAEncryption::Rsa rsa = RSA_256);
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static QByteArray encodeS(const QByteArray &rawData, const QByteArray &pubKey,
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Rsa rsa = RSA_256, BlockSize blockSizeMode = BlockSize::Auto);
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static QByteArray decodeS(const QByteArray &rawData, const QByteArray &privKey,
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Rsa rsa = RSA_256, BlockSize blockSizeMode = BlockSize::Auto);
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static QByteArray signMessageS(QByteArray rawData, const QByteArray &privKey,
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Rsa rsa = RSA_256);
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static bool checkSignMessageS(const QByteArray &rawData, const QByteArray &pubKey,
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Rsa rsa);
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// OLDMETHODS END
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static bool generatePairKey(QByteArray &pubKey, QByteArray &privKey,
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QRSAEncryption::Rsa rsa);
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static QByteArray encode(const QByteArray &rawData, const QByteArray &pubKey,
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Rsa rsa, BlockSize blockSizeMode = BlockSize::Auto);
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static QByteArray decode(const QByteArray &rawData, const QByteArray &privKey,
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Rsa rsa, BlockSize blockSizeMode = BlockSize::Auto);
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static QByteArray signMessage(QByteArray rawData, const QByteArray &privKey,
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Rsa rsa);
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static bool checkSignMessage(const QByteArray &rawData, const QByteArray &pubKey,
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Rsa rsa);
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static bool isValidRsaKey(const QByteArray& key);
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static unsigned int getKeyBytesSize(QRSAEncryption::Rsa rsa);
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// non-static methods
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bool generatePairKey(QByteArray &pubKey, QByteArray &privKey);
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QByteArray encode(const QByteArray &rawData, const QByteArray &pubKey,
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BlockSize blockSizeMode = BlockSize::Auto);
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QByteArray decode(const QByteArray &rawData, const QByteArray &privKey,
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BlockSize blockSizeMode = BlockSize::Auto);
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QByteArray signMessage(QByteArray rawData, const QByteArray &privKey);
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bool checkSignMessage(const QByteArray &rawData, const QByteArray &pubKey);
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Rsa getRsa() const;
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private:
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Rsa _rsa;
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bool testKeyPair(const QByteArray &pubKey, const QByteArray &privKey);
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bool isMutuallyPrime(const INT &a, const INT &b);
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Rsa getBitsSize(const INT& i) const;
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Rsa getBitsSize(const QByteArray& array) const;
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INT fromArray(const QByteArray& array) const;
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QByteArray toArray(const INT &i, short sizeBlok = -1);
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INT randomNumber(bool fullFilled = true) const;
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INT toPrime(INT) const;
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INT randomPrimeNumber(INT no = 0) const;
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INT extEuclid(INT a, INT b) const;
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short getBlockSize(INT i) const;
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QByteArray encodeBlok(const INT& block, const INT& e, const INT& m, short blockSize);
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QByteArray decodeBlok(const INT& block, const INT& d, const INT& m, short blockSize);
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};
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#endif // QRSAENCRYPTION_H
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