initial commit with refactoring in Qt

2025-04-26 21:54:32 +00:00 · 2017-06-21 16:04:33 -07:00 · 2017-06-21 16:04:33 -07:00 · a537bcf1b0
commit a537bcf1b0
parent 7f360bfb8d
5 changed files with 952 additions and 0 deletions
--- a/main.cpp
+++ b/main.cpp
@ -0,0 +1,84 @@
+#include <QCoreApplication>
+#include <QByteArray>
+#include <QDebug>
+#include <QString>
+//#include <QCryptographicHash>
+#include "qaesencryption.h"
+
+//const uint8_t iv[]   = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f };
+
+/*inline int getAlignedSize(int currSize, int alignment) {
+    int padding = (alignment - currSize % alignment) % alignment;
+    return currSize + padding;
+}*/
+
+/*QString encodeText(const QString rawText, const QString key);
+QString decodeText(const QString hexEncodedText, const QString key);
+*/
+
+int main(int argc, char *argv[])
+{
+    QCoreApplication a(argc, argv);
+
+    qDebug() << "START";
+    QByteArray srcString = "Hello World";
+    QByteArray key = "1234";
+    QAESEncryption encryption(QAESEncryption::AES_128, QAESEncryption::ECB);
+    QByteArray encodedString = encryption.encode(srcString, key);
+
+    qDebug() << "Encoded string is" << QString(encodedString);
+    //qDebug() << "Decoded string is" << decodeText(encodedString, key);
+    return 0;
+}
+/*
+QString encodeText(const QString rawText, const QString key) {
+   QCryptographicHash hash(QCryptographicHash::Md5);
+   hash.addData(key.toUtf8());
+   QByteArray keyData = hash.result();
+
+   const ushort *rawData = rawText.utf16();
+   void *rawDataVoid = (void*)rawData;
+   const char *rawDataChar = static_cast<const char*>(rawDataVoid);
+   QByteArray inputData;
+
+   // ushort is 2*uint8_t + 1 byte for '\0'
+   inputData.append(rawDataChar, rawText.size() * 2 + 1);
+
+   const int length = inputData.size();
+   int encryptionLength = getAlignedSize(length, 16);
+
+   QByteArray encodingBuffer(encryptionLength, 0);
+   inputData.resize(encryptionLength);
+
+   AES_CBC_encrypt_buffer((uint8_t*)encodingBuffer.data(), (uint8_t*)inputData.data(),
+      encryptionLength, (const uint8_t*)keyData.data(), iv);
+
+   QByteArray data(encodingBuffer.data(), encryptionLength);
+   QString hex = QString::fromLatin1(data.toHex());
+   return hex;
+}
+
+QString decodeText(const QString hexEncodedText, const QString key) {
+   QCryptographicHash hash(QCryptographicHash::Md5);
+   hash.addData(key.toUtf8());
+   QByteArray keyData = hash.result();
+
+   const int length = hexEncodedText.size();
+   int encryptionLength = getAlignedSize(length, 16);
+
+   QByteArray encodingBuffer(encryptionLength, 0);
+
+   QByteArray encodedText = QByteArray::fromHex(hexEncodedText.toLatin1());
+   encodedText.resize(encryptionLength);
+
+   AES_CBC_decrypt_buffer((uint8_t*)encodingBuffer.data(), (uint8_t*)encodedText.data(),
+     encryptionLength, (const uint8_t*)keyData.data(), iv);
+
+   void *data = encodingBuffer.data();
+   const ushort *decodedData = static_cast<const ushort*>(data);
+   QString result = QString::fromUtf16(decodedData);
+
+   return result;
+}*/
+
+
--- a/qaesencryption.cpp
+++ b/qaesencryption.cpp
@ -0,0 +1,418 @@
+#include "qaesencryption.h"
+#include <QDebug>
+
+// The lookup-tables are marked const so they can be placed in read-only storage instead of RAM
+// The numbers below can be computed dynamically trading ROM for RAM -
+// This can be useful in (embedded) bootloader applications, where ROM is often limited.
+static const uint8_t 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 };
+
+static const uint8_t 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)
+static const uint8_t Rcon[256] = {
+    0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d, 0x9a,
+    0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5, 0x91, 0x39,
+    0x72, 0xe4, 0xd3, 0xbd, 0x61, 0xc2, 0x9f, 0x25, 0x4a, 0x94, 0x33, 0x66, 0xcc, 0x83, 0x1d, 0x3a,
+    0x74, 0xe8, 0xcb, 0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8,
+    0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef,
+    0xc5, 0x91, 0x39, 0x72, 0xe4, 0xd3, 0xbd, 0x61, 0xc2, 0x9f, 0x25, 0x4a, 0x94, 0x33, 0x66, 0xcc,
+    0x83, 0x1d, 0x3a, 0x74, 0xe8, 0xcb, 0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b,
+    0x36, 0x6c, 0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3,
+    0x7d, 0xfa, 0xef, 0xc5, 0x91, 0x39, 0x72, 0xe4, 0xd3, 0xbd, 0x61, 0xc2, 0x9f, 0x25, 0x4a, 0x94,
+    0x33, 0x66, 0xcc, 0x83, 0x1d, 0x3a, 0x74, 0xe8, 0xcb, 0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20,
+    0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35,
+    0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5, 0x91, 0x39, 0x72, 0xe4, 0xd3, 0xbd, 0x61, 0xc2, 0x9f,
+    0x25, 0x4a, 0x94, 0x33, 0x66, 0xcc, 0x83, 0x1d, 0x3a, 0x74, 0xe8, 0xcb, 0x8d, 0x01, 0x02, 0x04,
+    0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc, 0x63,
+    0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5, 0x91, 0x39, 0x72, 0xe4, 0xd3, 0xbd,
+    0x61, 0xc2, 0x9f, 0x25, 0x4a, 0x94, 0x33, 0x66, 0xcc, 0x83, 0x1d, 0x3a, 0x74, 0xe8, 0xcb, 0x8d };
+
+inline uint8_t xTime(uint8_t x){
+  return ((x<<1) ^ (((x>>7) & 1) * 0x1b));
+}
+
+#define Multiply(x, y)                                \
+      (  ((y & 1) * x) ^                              \
+      ((y>>1 & 1) * xTime(x)) ^                       \
+      ((y>>2 & 1) * xTime(xTime(x))) ^                \
+      ((y>>3 & 1) * xTime(xTime(xTime(x)))) ^         \
+      ((y>>4 & 1) * xTime(xTime(xTime(xTime(x))))))   \
+
+
+QAESEncryption::QAESEncryption(QAESEncryption::AES level, QAESEncryption::MODE mode) : m_level(level), m_mode(mode)
+{
+    m_state->clear();
+    qDebug() << "WTF";
+
+    switch (level)
+    {
+    case AES_128: {
+        AES128 aes;
+        m_nk = aes.nk;
+        m_keyLen = aes.keylen;
+        m_nr = aes.nr;
+        m_expandedKey = aes.expandedKey;
+        qDebug() << "AES128";
+        }
+        break;
+    case AES_192: {
+        AES192 aes;
+        m_nk = aes.nk;
+        m_keyLen = aes.keylen;
+        m_nr = aes.nr;
+        m_expandedKey = aes.expandedKey;
+        }
+        break;
+    case AES_256: {
+        AES256 aes;
+        m_nk = aes.nk;
+        m_keyLen = aes.keylen;
+        m_nr = aes.nr;
+        m_expandedKey = aes.expandedKey;
+        }
+        break;
+    default: {
+        AES128 aes;
+        m_nk = aes.nk;
+        m_keyLen = aes.keylen;
+        m_nr = aes.nr;
+        m_expandedKey = aes.expandedKey;
+        qDebug() << "AES128";
+        }
+        break;
+    }
+
+}
+
+uint8_t QAESEncryption::getSBoxValue(uint8_t num)
+{
+  return sbox[num];
+}
+
+uint8_t QAESEncryption::getSBoxInvert(uint8_t num)
+{
+  return rsbox[num];
+}
+
+QByteArray QAESEncryption::expandKey(const QByteArray key)
+{
+  int i, k;
+  uint8_t tempa[4]; // Used for the column/row operations
+  QByteArray roundKey(key);
+
+  // The first round key is the key itself.
+  for(i = 0; i < m_nk; ++i)
+  {
+    roundKey.insert((i * 4) + 0, key.at((i * 4) + 0));
+    roundKey.insert((i * 4) + 1, key.at((i * 4) + 1));
+    roundKey.insert((i * 4) + 2, key.at((i * 4) + 2));
+    roundKey.insert((i * 4) + 3, key.at((i * 4) + 3));
+  }
+
+  // All other round keys are found from the previous round keys.
+  //i == Nk
+  for(; i < m_nb * (m_nr + 1); ++i)
+  {
+    {
+      tempa[0] = roundKey.at((i-1) * 4 + 0);
+      tempa[1] = roundKey.at((i-1) * 4 + 1);
+      tempa[2] = roundKey.at((i-1) * 4 + 2);
+      tempa[3] = roundKey.at((i-1) * 4 + 3);
+    }
+
+    if (i % m_nk == 0)
+    {
+      // This function shifts the 4 bytes in a word to the left once.
+      // [a0,a1,a2,a3] becomes [a1,a2,a3,a0]
+
+      // Function RotWord()
+      {
+        k = tempa[0];
+        tempa[0] = tempa[1];
+        tempa[1] = tempa[2];
+        tempa[2] = tempa[3];
+        tempa[3] = k;
+      }
+
+      // SubWord() is a function that takes a four-byte input word and
+      // applies the S-box to each of the four bytes to produce an output word.
+
+      // Function Subword()
+      {
+        tempa[0] = getSBoxValue(tempa[0]);
+        tempa[1] = getSBoxValue(tempa[1]);
+        tempa[2] = getSBoxValue(tempa[2]);
+        tempa[3] = getSBoxValue(tempa[3]);
+      }
+
+      tempa[0] =  tempa[0] ^ Rcon[i/m_nk];
+    }
+    if (m_level == AES_256 && i % m_nk == 4)
+    {
+      // Function Subword()
+      {
+        tempa[0] = getSBoxValue(tempa[0]);
+        tempa[1] = getSBoxValue(tempa[1]);
+        tempa[2] = getSBoxValue(tempa[2]);
+        tempa[3] = getSBoxValue(tempa[3]);
+      }
+    }
+    roundKey.insert(i * 4 + 0, roundKey.at((i - m_nk) * 4 + 0) ^ tempa[0]);
+    roundKey.insert(i * 4 + 1, roundKey.at((i - m_nk) * 4 + 1) ^ tempa[1]);
+    roundKey.insert(i * 4 + 2, roundKey.at((i - m_nk) * 4 + 2) ^ tempa[2]);
+    roundKey.insert(i * 4 + 3, roundKey.at((i - m_nk) * 4 + 3) ^ tempa[3]);
+  }
+
+  return roundKey;
+}
+
+// This function adds the round key to state.
+// The round key is added to the state by an XOR function.
+void QAESEncryption::addRoundKey(int round, const QByteArray expKey)
+{
+  for(int i=0; i < 16; i++)
+      m_state->insert(i, m_state->at(i) ^ expKey.at(round * m_nb * 4 + (i/4) * m_nb + (i%4)));
+}
+
+// The SubBytes Function Substitutes the values in the
+// state matrix with values in an S-box.
+void QAESEncryption::subBytes()
+{
+  for(int i = 0; i < 16; i++)
+    m_state->insert(i, getSBoxValue(m_state->at(i)));
+}
+
+// The ShiftRows() function shifts the rows in the state to the left.
+// Each row is shifted with different offset.
+// Offset = Row number. So the first row is not shifted.
+void QAESEncryption::shiftRows()
+{
+    uint8_t temp;
+
+     //Shift 1
+    temp = m_state->at(4);
+    m_state->insert(4, m_state->at(4+1));
+    m_state->insert(4+1, m_state->at(4+2));
+    m_state->insert(4+2, m_state->at(4+3));
+    m_state->insert(4+3, temp);
+
+    //Shift 2
+    temp = m_state->at(8);
+    m_state->insert(8, m_state->at(8+2));
+    m_state->insert(8+2, temp);
+    temp = m_state->at(8+1);
+    m_state->insert(8+1, m_state->at(8+3));
+    m_state->insert(8+3, temp);
+
+    //Shift 3
+    temp = m_state->at(12);
+    m_state->insert(12, m_state->at(12+3));
+    m_state->insert(12+3, m_state->at(12+2));
+    m_state->insert(12+2, m_state->at(12+1));
+    m_state->insert(12+1, temp);
+}
+
+// MixColumns function mixes the columns of the state matrix
+//optimized!!
+void QAESEncryption::mixColumns()
+{
+  uint8_t Tmp,Tm,t;
+  for(int i = 0; i < 16; i+=4)
+  {
+    t   = m_state->at(i);
+    Tmp = m_state->at(i) ^ m_state->at(i+1) ^ m_state->at(i+2) ^ m_state->at(i+3) ;
+
+    Tm  = m_state->at(i) ^ m_state->at(i+1);
+    Tm = xTime(Tm);
+    m_state->insert(i, m_state->at(i) ^ Tm ^ Tmp);
+
+    Tm  = m_state->at(i+1) ^ m_state->at(i+2);
+    Tm = xTime(Tm);
+    m_state->insert(i+1, m_state->at(i+1) ^ Tm ^ Tmp);
+
+    Tm  = m_state->at(i+2) ^ m_state->at(i+3);
+    Tm = xTime(Tm);
+    m_state->insert(i+2, m_state->at(i+2) ^ Tm ^ Tmp);
+
+    Tm  = m_state->at(i+3) ^ t;
+    Tm = xTime(Tm);
+    m_state->insert(i+3, m_state->at(i+3) ^ Tm ^ Tmp);
+  }
+}
+
+// MixColumns function mixes the columns of the state matrix.
+// The method used to multiply may be difficult to understand for the inexperienced.
+// Please use the references to gain more information.
+void QAESEncryption::invMixColumns()
+{
+  uint8_t a,b,c,d;
+  for(int i = 0; i < 16; i+=4)
+  {
+    a = m_state->at(i);
+    b = m_state->at(i+1);
+    c = m_state->at(i+2);
+    d = m_state->at(i+3);
+
+    m_state->insert(i, Multiply(a, 0x0e) ^ Multiply(b, 0x0b) ^ Multiply(c, 0x0d) ^ Multiply(d, 0x09));
+    m_state->insert(i+1, Multiply(a, 0x09) ^ Multiply(b, 0x0e) ^ Multiply(c, 0x0b) ^ Multiply(d, 0x0d));
+    m_state->insert(i+2, Multiply(a, 0x0d) ^ Multiply(b, 0x09) ^ Multiply(c, 0x0e) ^ Multiply(d, 0x0b));
+    m_state->insert(i+3, Multiply(a, 0x0b) ^ Multiply(b, 0x0d) ^ Multiply(c, 0x09) ^ Multiply(d, 0x0e));
+  }
+}
+
+// The SubBytes Function Substitutes the values in the
+// state matrix with values in an S-box.
+void QAESEncryption::invSubBytes()
+{
+  for(int i = 0; i < 16; ++i)
+      m_state->insert(i, getSBoxInvert(m_state->at(i)));
+}
+
+void QAESEncryption::invShiftRows()
+{
+  uint8_t temp;
+
+   //Shift 1 to right
+  temp = m_state->at(4+3);
+  m_state->insert(4+3, m_state->at(4+2));
+  m_state->insert(4+2, m_state->at(4+1));
+  m_state->insert(4+1, m_state->at(4));
+  m_state->insert(4, temp);
+
+  //Shift 2
+  temp = m_state->at(8+2);
+  m_state->insert(8+2, m_state->at(8));
+  m_state->insert(8, temp);
+  temp = m_state->at(8+3);
+  m_state->insert(8+3, m_state->at(8+1));
+  m_state->insert(8+1, temp);
+
+  //Shift 3
+  temp = m_state->at(12+3);
+  m_state->insert(12+3, m_state->at(12));
+  m_state->insert(12, m_state->at(12+1));
+  m_state->insert(12+1, m_state->at(12+2));
+  m_state->insert(12+2, temp);
+}
+
+// Cipher is the main function that encrypts the PlainText.
+QByteArray QAESEncryption::cipher(const QByteArray expKey, const QByteArray in)
+{
+
+  //m_state is the input buffer.... handle it!
+  QByteArray output(in);
+  m_state = &output;
+  uint8_t round = 0;
+
+  qDebug() << "Cyper " << QString(expKey);
+
+  // Add the First round key to the state before starting the rounds.
+  addRoundKey(0, expKey);
+
+  // There will be Nr rounds.
+  // The first Nr-1 rounds are identical.
+  // These Nr-1 rounds are executed in the loop below.
+  for(round = 1; round < m_nr; ++round)
+  {
+    subBytes();
+    shiftRows();
+    mixColumns();
+    addRoundKey(round, expKey);
+  }
+
+  // The last round is given below.
+  // The MixColumns function is not here in the last round.
+  subBytes();
+  shiftRows();
+  addRoundKey(m_nr, expKey);
+
+  qDebug() << "Cyper " << QString(output);
+
+  return output;
+}
+
+void QAESEncryption::invCipher()
+{
+  /*uint8_t round=0;
+
+  // Add the First round key to the state before starting the rounds.
+  addRoundKey(m_nr);
+
+  // There will be Nr rounds.
+  // The first Nr-1 rounds are identical.
+  // These Nr-1 rounds are executed in the loop below.
+  for(round=m_nr-1;round>0;round--)
+  {
+    invShiftRows();
+    invSubBytes();
+    addRoundKey(round);
+    invMixColumns();
+  }
+
+  // The last round is given below.
+  // The MixColumns function is not here in the last round.
+  invShiftRows();
+  invSubBytes();
+  addRoundKey(0);*/
+}
+
+QByteArray QAESEncryption::encode(const QByteArray rawText, const QByteArray key, const QByteArray iv)
+{
+   //if (m_mode == CBC && iv == NULL)
+   //    return NULL; //EMIT ERROR!
+
+  qDebug() << "YAY";
+  QByteArray expandedKey = expandKey(key);
+
+  // The next function call encrypts the PlainText with the Key using AES algorithm.
+  return cipher(expandedKey, rawText);
+}
+
+/*
+QByteArray QAESEncryption::decode(const uint8_t* input, const uint8_t* key, uint8_t *output, const uint32_t length)
+{
+  // Copy input to output, and work in-memory on output
+  memcpy(output, input, length);
+  state = (state_t*)output;
+
+  // The KeyExpansion routine must be called before encryption.
+  Key = key;
+  KeyExpansion();
+
+  InvCipher();
+}
+*/
--- a/qaesencryption.h
+++ b/qaesencryption.h
@ -0,0 +1,78 @@
+#ifndef QAESENCRYPTION_H
+#define QAESENCRYPTION_H
+
+#include <QObject>
+#include <QByteArray>
+#include <QVariant>
+
+class QAESEncryption : public QObject
+{
+    Q_OBJECT
+public:
+    typedef enum {
+        AES_128,
+        AES_192,
+        AES_256
+    } AES;
+
+    typedef enum {
+        ECB,
+        CBC
+    } MODE;
+
+    QAESEncryption(QAESEncryption::AES level, QAESEncryption::MODE mode);
+
+    QByteArray encode(const QByteArray rawText, const QByteArray key, const QByteArray iv = NULL);
+    QByteArray decode(const QByteArray encodedText, const QByteArray key, const QByteArray iv = NULL);
+
+signals:
+
+public slots:
+
+private:
+    //typedef uint8_t state[4][4];
+
+    int m_nb = 4, m_blocklen = 16, m_mode, m_level;
+    //QByteArray m_roundKey;
+    //uint8_t* m_state[4][4];
+    QByteArray* m_state;
+    void* m_aesData;
+
+    int m_nk, m_keyLen, m_nr, m_expandedKey;
+
+    typedef struct{
+        int nk = 8;
+        int keylen = 32;
+        int nr = 14;
+        int expandedKey = 240;
+    } AES256;
+
+    typedef struct{
+        int nk = 6;
+        int keylen = 24;
+        int nr = 12;
+        int expandedKey = 209;
+    } AES192;
+
+    typedef struct{
+        int nk = 4;
+        int keylen = 16;
+        int nr = 10;
+        int expandedKey = 176;
+    } AES128;
+
+    uint8_t getSBoxValue(uint8_t num);
+    uint8_t getSBoxInvert(uint8_t num);
+    QByteArray expandKey(const QByteArray key);
+    void addRoundKey(int round, const QByteArray expKey);
+    void subBytes();
+    void shiftRows();
+    void mixColumns();
+    void invMixColumns();
+    void invSubBytes();
+    void invShiftRows();
+    QByteArray cipher(const QByteArray expKey, const QByteArray plainText);
+    void invCipher();
+};
+
+#endif // QAESENCRYPTION_H
--- a/qaesencryption.pro
+++ b/qaesencryption.pro
@ -0,0 +1,30 @@
+QT += core
+QT -= gui
+
+CONFIG += c++11
+
+TARGET = QAESEncryption
+CONFIG += console
+CONFIG -= app_bundle
+
+TEMPLATE = app
+
+SOURCES += main.cpp \
+    tiny-AES-C/aes.c \
+    qaesencryption.cpp
+
+# The following define makes your compiler emit warnings if you use
+# any feature of Qt which as been marked deprecated (the exact warnings
+# depend on your compiler). Please consult the documentation of the
+# deprecated API in order to know how to port your code away from it.
+DEFINES += QT_DEPRECATED_WARNINGS
+
+# You can also make your code fail to compile if you use deprecated APIs.
+# In order to do so, uncomment the following line.
+# You can also select to disable deprecated APIs only up to a certain version of Qt.
+#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
+
+HEADERS += \
+    tiny-AES-C/aes.h \
+    qaesencryption.h
+
--- a/qaesencryption.pro.user
+++ b/qaesencryption.pro.user
@ -0,0 +1,342 @@
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+ <data>
+  <variable>Version</variable>
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+ </data>
+</qtcreator>