QuasarApp/Qt-AES
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working on padding feature

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This commit is contained in:
Matteo Brichese 2018-03-28 17:42:09 -07:00
parent dcb49d1fd1
commit 1809de722f
5 changed files with 78 additions and 51 deletions
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1
main.cpp
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@ -2,6 +2,7 @@
#include <QTest>
#include "unit_test/aestest.h"
int main(int argc, char *argv[])
{
QCoreApplication a(argc, argv);

25
qaesencryption.cpp
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@ -85,6 +85,8 @@ QByteArray QAESEncryption::getPadding(int currSize, int alignment)
{
QByteArray ret(0);
int size = (alignment - currSize % alignment) % alignment;
// if (size == 0)
// size = alignment;
switch(m_padding)
{
case PADDING::ZERO:
@ -158,6 +160,29 @@ QByteArray QAESEncryption::expandKey(const QByteArray &key)
return roundKey;
}
QByteArray QAESEncryption::RemovePadding(const QByteArray &rawText, QAESEncryption::PADDING padding)
{
QByteArray ret(rawText);
switch (padding)
{
case PADDING::ZERO:
//Works only if the last byte of the decoded array is not zero
while (ret.at(ret.length()-1) == 0x00)
ret.remove(ret.length()-1, 1);
break;
case PADDING::PKCS7:
ret.remove(ret.length() - ret.at(ret.length()-1), ret.at(ret.length()-1));
break;
case PADDING::ISO:
ret.truncate(ret.lastIndexOf(0x80));
break;
default:
//do nothing
break;
}
return ret;
}
// This function adds the round key to state.
// The round key is added to the state by an XOR function.
void QAESEncryption::addRoundKey(const quint8 round, const QByteArray expKey)

1
qaesencryption.h
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@ -29,6 +29,7 @@ public:
static QByteArray Crypt(QAESEncryption::AES level, QAESEncryption::MODE mode, const QByteArray &rawText, const QByteArray &key, const QByteArray &iv = NULL);
static QByteArray Decrypt(QAESEncryption::AES level, QAESEncryption::MODE mode, const QByteArray &rawText, const QByteArray &key, const QByteArray &iv = NULL);
static QByteArray ExpandKey(QAESEncryption::AES level, QAESEncryption::MODE mode, const QByteArray &key);
static QByteArray RemovePadding(const QByteArray &rawText, QAESEncryption::PADDING padding = PADDING::ZERO);
QAESEncryption(QAESEncryption::AES level, QAESEncryption::MODE mode, QAESEncryption::PADDING padding = QAESEncryption::ZERO);

88
unit_test/aestest.cpp
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@ -59,51 +59,50 @@ void AesTest::ECB128Crypt()
{
QByteArray hexText, outputHex;
QAESEncryption encryption(QAESEncryption::AES_128, QAESEncryption::ECB);
QCOMPARE(encryption.encode(in, key16), outECB128);
}
void AesTest::ECB128Decrypt()
{
QByteArray hexText, outputHex;
QAESEncryption encryption(QAESEncryption::AES_128, QAESEncryption::ECB);
//void AesTest::ECB128Decrypt()
//{
// QByteArray hexText, outputHex;
// QAESEncryption encryption(QAESEncryption::AES_128, QAESEncryption::ECB);
QCOMPARE(encryption.decode(outECB128, key16), in);
}
// QCOMPARE(QAESEncryption::RemovePadding(encryption.decode(outECB128, key16)), in);
//}
void AesTest::ECB192Crypt()
{
QByteArray outputHex;
QAESEncryption encryption(QAESEncryption::AES_192, QAESEncryption::ECB);
//void AesTest::ECB192Crypt()
//{
// QByteArray outputHex;
// QAESEncryption encryption(QAESEncryption::AES_192, QAESEncryption::ECB);
QCOMPARE(encryption.encode(in, key24), outECB192);
}
// QCOMPARE(QAESEncryption::RemovePadding(encryption.encode(in, key24)), outECB192);
//}
void AesTest::ECB192Decrypt()
{
QByteArray hexText;
QAESEncryption encryption(QAESEncryption::AES_192, QAESEncryption::ECB);
//void AesTest::ECB192Decrypt()
//{
// QByteArray hexText;
// QAESEncryption encryption(QAESEncryption::AES_192, QAESEncryption::ECB);
QCOMPARE(encryption.decode(outECB192, key24), in);
}
// QCOMPARE(QAESEncryption::RemovePadding(encryption.decode(outECB192, key24)), in);
//}
void AesTest::ECB256Crypt()
{
QAESEncryption encryption(QAESEncryption::AES_256, QAESEncryption::ECB);
//void AesTest::ECB256Crypt()
//{
// QAESEncryption encryption(QAESEncryption::AES_256, QAESEncryption::ECB);
QCOMPARE(encryption.encode(in, key32), outECB256);
}
// QCOMPARE(QAESEncryption::RemovePadding(encryption.encode(in, key32)), outECB256);
//}
void AesTest::ECB256Decrypt()
{
QAESEncryption encryption(QAESEncryption::AES_256, QAESEncryption::ECB);
//void AesTest::ECB256Decrypt()
//{
// QAESEncryption encryption(QAESEncryption::AES_256, QAESEncryption::ECB);
QCOMPARE(encryption.decode(outECB256, key32), in);
}
// QCOMPARE(QAESEncryption::RemovePadding(encryption.decode(outECB256, key32)), in);
//}
void AesTest::ECB256String()
{
QAESEncryption encryption(QAESEncryption::AES_256, QAESEncryption::ECB);
QAESEncryption encryption(QAESEncryption::AES_256, QAESEncryption::ECB, QAESEncryption::PADDING::ISO);
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. "
@ -113,26 +112,27 @@ void AesTest::ECB256String()
QByteArray hashKey = QCryptographicHash::hash(key.toLocal8Bit(), QCryptographicHash::Sha256);
QByteArray encodeText = encryption.encode(inputStr.toLocal8Bit(), hashKey);
QByteArray decodedText = QAESEncryption::RemovePadding(encryption.decode(encodeText, hashKey), QAESEncryption::PADDING::ISO);
QCOMPARE(QString(encryption.decode(encodeText, hashKey)), inputStr);
QCOMPARE(QString(decodedText), inputStr);
}
//==================CBC TESTING=========================
////==================CBC TESTING=========================
void AesTest::CBC128Crypt()
{
QAESEncryption encryption(QAESEncryption::AES_128, QAESEncryption::CBC);
//void AesTest::CBC128Crypt()
//{
// QAESEncryption encryption(QAESEncryption::AES_128, QAESEncryption::CBC);
QCOMPARE(encryption.encode(inCBC128, key16, iv), outCBC128);
}
// QCOMPARE(QAESEncryption::RemovePadding(encryption.encode(inCBC128, key16, iv)), outCBC128);
//}
void AesTest::CBC128Decrypt()
{
QAESEncryption encryption(QAESEncryption::AES_128, QAESEncryption::CBC);
//void AesTest::CBC128Decrypt()
//{
// QAESEncryption encryption(QAESEncryption::AES_128, QAESEncryption::CBC);
QCOMPARE(encryption.decode(outCBC128, key16, iv), inCBC128);
}
// QCOMPARE(QString(QAESEncryption::RemovePadding(encryption.decode(outCBC128, key16, iv))), inCBC128);
//}
//=================== CFB TESTING ============================
@ -148,6 +148,6 @@ void AesTest::CFB256String()
QByteArray hashKey = QCryptographicHash::hash(key.toLocal8Bit(), QCryptographicHash::Sha256);
QByteArray encodeText = encryption.encode(inputStr.toLocal8Bit(), hashKey, iv);
QCOMPARE(QString(encryption.decode(encodeText, hashKey, iv)), inputStr);
QByteArray decodedText = QAESEncryption::RemovePadding(encryption.decode(encodeText, hashKey, iv));
QCOMPARE(QString(decodedText), inputStr);
}

14
unit_test/aestest.h
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@ -12,18 +12,18 @@ private slots:
void initTestCase();
void ECB128Crypt();
void ECB128Decrypt();
// void ECB128Decrypt();
void ECB192Crypt();
void ECB192Decrypt();
// void ECB192Crypt();
// void ECB192Decrypt();
void ECB256Crypt();
void ECB256Decrypt();
// void ECB256Crypt();
// void ECB256Decrypt();
void ECB256String();
void CBC128Crypt();
void CBC128Decrypt();
// void CBC128Crypt();
// void CBC128Decrypt();
void CFB256String();