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qaesencryption.h
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qaesencryption.h
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#ifndef QAESENCRYPTION_H
#define QAESENCRYPTION_H
#ifdef QtAES_EXPORTS
#include "qtaes_export.h"
#else
#define QTAESSHARED_EXPORT
#endif
#include <QObject>
#include <QByteArray>
#ifdef __linux__
#ifndef __LP64__
#define do_rdtsc _do_rdtsc
#endif
#endif
class QTAESSHARED_EXPORT QAESEncryption : public QObject
{
Q_OBJECT
public:
enum Aes {
AES_128,
AES_192,
AES_256
};
enum Mode {
ECB,
CBC,
CFB,
OFB
};
enum Padding {
ZERO,
PKCS7,
ISO
};
/*!
* \brief static method call to encrypt data given by rawText
* \param level: AES::Aes level
* \param mode: AES::Mode mode
* \param rawText: input text
* \param key: user-key (key.size either 128, 192, 256 bits depending on AES::Aes)
* \param iv: initialisation-vector (iv.size is 128 bits (16 Bytes))
* \param padding: AES::Padding standard
* \return encrypted cipher
*/
static QByteArray Crypt(QAESEncryption::Aes level, QAESEncryption::Mode mode, const QByteArray &rawText, const QByteArray &key,
const QByteArray &iv = QByteArray(), QAESEncryption::Padding padding = QAESEncryption::ISO);
/*!
* \brief static method call to decrypt data given by rawText
* \param level: AES::Aes level
* \param mode: AES::Mode mode
* \param rawText: input text
* \param key: user-key (key.size either 128, 192, 256 bits depending on AES::Aes)
* \param iv: initialisation-vector (iv.size is 128 bits (16 Bytes))
* \param padding: AES::Padding standard
* \return decrypted cipher with padding
*/
static QByteArray Decrypt(QAESEncryption::Aes level, QAESEncryption::Mode mode, const QByteArray &rawText, const QByteArray &key,
const QByteArray &iv = QByteArray(), QAESEncryption::Padding padding = QAESEncryption::ISO);
/*!
* \brief static method call to expand the user key to fit the encrypting/decrypting algorithm
* \param level: AES::Aes level
* \param mode: AES::Mode mode
* \param key: user-key (key.size either 128, 192, 256 bits depending on AES::Aes)
* \param expKey: output expanded key
* \param isEncryptionKey: always 'true' || only 'false' when DECRYPTING in CBC or EBC mode with aesni (check if supported)
* \return AES-ready key
*/
static QByteArray ExpandKey(QAESEncryption::Aes level, QAESEncryption::Mode mode, const QByteArray &key, bool isEncryptionKey);
/*!
* \brief static method call to remove padding from decrypted cipher given by rawText
* \param rawText: inputText
* \param padding: AES::Padding standard
* \return decrypted cipher with padding removed
*/
static QByteArray RemovePadding(const QByteArray &rawText, QAESEncryption::Padding padding = QAESEncryption::ISO);
QAESEncryption(QAESEncryption::Aes level, QAESEncryption::Mode mode,
QAESEncryption::Padding padding = QAESEncryption::ISO);
/*!
* \brief object method call to encrypt data given by rawText
* \param rawText: input text
* \param key: user-key (key.size either 128, 192, 256 bits depending on AES::Aes)
* \param iv: initialisation-vector (iv.size is 128 bits (16 Bytes))
* \return encrypted cipher
*/
QByteArray encode(const QByteArray &rawText, const QByteArray &key, const QByteArray &iv = QByteArray());
/*!
* \brief object method call to decrypt data given by rawText
* \param rawText: input text
* \param key: user-key (key.size either 128, 192, 256 bits depending on AES::Aes)
* \param iv: initialisation-vector (iv.size is 128 bits (16 Bytes))
* \param padding: AES::Padding standard
* \return decrypted cipher with padding
*/
QByteArray decode(const QByteArray &rawText, const QByteArray &key, const QByteArray &iv = QByteArray());
/*!
* \brief object method call to expand the user key to fit the encrypting/decrypting algorithm
* \param key: user-key (key.size either 128, 192, 256 bits depending on AES::Aes)
* \param isEncryptionKey: always 'true' || only 'false' when DECRYPTING in CBC or EBC mode with aesni (check if supported)
* \return AES-ready key
*/
QByteArray expandKey(const QByteArray &key, bool isEncryptionKey);
/*!
* \brief object method call to remove padding from decrypted cipher given by rawText
* \param rawText: inputText
* \return decrypted cipher with padding removed
*/
QByteArray removePadding(const QByteArray &rawText);
QByteArray printArray(uchar *arr, int size);
Q_SIGNALS:
public Q_SLOTS:
private:
int m_nb;
int m_blocklen;
int m_level;
int m_mode;
int m_nk;
int m_keyLen;
int m_nr;
int m_expandedKey;
int m_padding;
bool m_aesNIAvailable;
QByteArray* m_state;
struct AES256{
int nk = 8;
int keylen = 32;
int nr = 14;
int expandedKey = 240;
int userKeySize = 256;
};
struct AES192{
int nk = 6;
int keylen = 24;
int nr = 12;
int expandedKey = 209;
int userKeySize = 192;
};
struct AES128{
int nk = 4;
int keylen = 16;
int nr = 10;
int expandedKey = 176;
int userKeySize = 128;
};
quint8 getSBoxValue(quint8 num){return sbox[num];}
quint8 getSBoxInvert(quint8 num){return rsbox[num];}
void addRoundKey(const quint8 round, const QByteArray &expKey);
void subBytes();
void shiftRows();
void mixColumns();
void invMixColumns();
void invSubBytes();
void invShiftRows();
QByteArray getPadding(int currSize, int alignment);
QByteArray cipher(const QByteArray &expKey, const QByteArray &in);
QByteArray invCipher(const QByteArray &expKey, const QByteArray &in);
QByteArray byteXor(const QByteArray &a, const QByteArray &b);
const quint8 sbox[256] = {
//0 1 2 3 4 5 6 7 8 9 A B C D E F
0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76,
0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0,
0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15,
0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75,
0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84,
0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf,
0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8,
0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2,
0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73,
0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb,
0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79,
0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08,
0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a,
0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e,
0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf,
0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16 };
const quint8 rsbox[256] = {
0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb,
0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87, 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb,
0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d, 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e,
0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2, 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25,
0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92,
0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda, 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84,
0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06,
0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b,
0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73,
0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, 0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e,
0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89, 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b,
0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20, 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4,
0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f,
0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef,
0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61,
0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d };
// The round constant word array, Rcon[i], contains the values given by
// x to th e power (i-1) being powers of x (x is denoted as {02}) in the field GF(2^8)
// Only the first 14 elements are needed
const quint8 Rcon[14] = {
0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab};
};
#endif // QAESENCRYPTION_H