Qt-AES

Small and portable AES encryption class for Qt. Supports all key sizes - 128/192/256 bits - ECB and CBC modes

Usage

Usage via instance

Example for 128bit ECB

#include "qaesencryption.h"

  QAESEncryption encryption(QAESEncryption::AES_128, QAESEncryption::ECB);
  QByteArray encodedText = encryption.encode(plainText, key);

  QByteArray decodedText = encryption.decode(encodedText, key);

Example for 256bit CBC using QString

#include <QCryptographicHash>
#include "qaesencryption.h"

  QAESEncryption encryption(QAESEncryption::AES_256, QAESEncryption::CBC);

  QString inputStr("The Advanced Encryption Standard (AES), also known by its original name Rijndael "
                   "is a specification for the encryption of electronic data established by the U.S. "
                  "National Institute of Standards and Technology (NIST) in 2001");
  QString key("your-string-key");
  QString iv("your-IV-vector");

  QByteArray hashKey = QCryptographicHash::hash(key.toLocal8Bit(), QCryptographicHash::Sha256);
  QByteArray hashIV = QCryptographicHash::hash(iv.toLocal8Bit(), QCryptographicHash::Sha256);

  QByteArray encodeText = encryption.encode(inputStr.toLocal8Bit(), hashKey, hashIV);
  QByteArray decodeText = encryption.decode(encodeText, hashKey, hashIV);

Usage via static invocation

Example of static invocation without creating instances

#include <QCryptographicHash>
#include "qaesencryption.h"

  QString inputStr("The Advanced Encryption Standard (AES), also known by its original name Rijndael "
                   "is a specification for the encryption of electronic data established by the U.S. "
                  "National Institute of Standards and Technology (NIST) in 2001");
  QString key("your-string-key");
  QString iv("your-IV-vector");

  QByteArray hashKey = QCryptographicHash::hash(key.toLocal8Bit(), QCryptographicHash::Sha256);
  QByteArray hashIV = QCryptographicHash::hash(iv.toLocal8Bit(), QCryptographicHash::Sha256);

  //Static invocation
  QAESEncryption::Crypt(QAESEncryption::AES_256, QAESEncryption::CBC, inputStr.toLocal8Bit(), hashKey, hashIV);

Unit Testing

The unit testing vectors are available at NIST-Recommendation for Block Cipher Modes of Operation

Contact

Question or suggestions are welcome! Please use the GitHub issue tracking to report suggestions or issues.

Licence

This software is provided under the UNLICENSE