public void PaddingNone_PaddedEncrypt()
{
Gost28147CryptoServiceProvider key =
new Gost28147CryptoServiceProvider();
key.GenerateKey();
key.Mode = CipherMode.ECB;
key.Padding = PaddingMode.None;
ICryptoTransform encryptor = key.CreateEncryptor();
Assert.Equal(8, encryptor.InputBlockSize);
Assert.Equal(8, encryptor.OutputBlockSize);
byte[] encypted = encryptor.TransformFinalBlock(WellKnownData,
0, WellKnownData.Length);
Assert.Equal(WellKnownData.Length, encypted.Length);
ICryptoTransform decryptor = key.CreateDecryptor();
Assert.Equal(8, decryptor.InputBlockSize);
Assert.Equal(8, decryptor.OutputBlockSize);
byte[] decrypted = decryptor.TransformFinalBlock(encypted,
0, encypted.Length);
Assert.Equal(WellKnownData, decrypted);
}
public void PaddingISO10126_PaddedCheckValidBlock()
{
byte[] invalidPadding = new byte[] {
0x11, 0x22, 0x33,
0x0D, 0x0D, 0x0D, 0x0D,
0x0D, 0x0D, 0x0D, 0x0D, 0x0D, 0x0D, 0x0D, 0x0D,
0x0D // Ошибка!
};
// Шифруем без padding
Gost28147CryptoServiceProvider key =
new Gost28147CryptoServiceProvider();
key.GenerateKey();
key.Mode = CipherMode.ECB;
key.Padding = PaddingMode.None;
ICryptoTransform encryptor = key.CreateEncryptor();
byte[] encypted = encryptor.TransformFinalBlock(invalidPadding,
0, invalidPadding.Length);
Assert.Equal(16, encypted.Length);
// Расшифровываем как бы с padding
key.Padding = PaddingMode.ISO10126;
ICryptoTransform decryptor = key.CreateDecryptor();
// Не пользуемся ExpectedExceptionAttribute он может случится на encrypt
Assert.ThrowsAny <CryptographicException>(() => decryptor.TransformFinalBlock(encypted,
0, encypted.Length));
}
public void PaddingISO10126_PaddedSetValid()
{
Gost28147CryptoServiceProvider key =
new Gost28147CryptoServiceProvider();
key.GenerateKey();
key.Mode = CipherMode.ECB;
key.Padding = PaddingMode.ISO10126;
ICryptoTransform encryptor = key.CreateEncryptor();
byte[] encypted = encryptor.TransformFinalBlock(WellKnownUnpaddedData,
0, WellKnownUnpaddedData.Length);
Assert.Equal(8, encypted.Length);
// Расшифровываем без padding
key.Padding = PaddingMode.None;
ICryptoTransform decryptor = key.CreateDecryptor();
byte[] decrypted = decryptor.TransformFinalBlock(encypted,
0, encypted.Length);
// проверяем что ожидаем из текста.
Assert.Equal(WellKnownUnpaddedData, decrypted.Take(WellKnownUnpaddedData.Length));
// проверяем что ожидаем из длины.
Assert.Equal(5, decrypted[7]);
}
public void PaddingPKCS7_PaddedSetValid()
{
Gost28147CryptoServiceProvider key =
new Gost28147CryptoServiceProvider();
key.GenerateKey();
key.Mode = CipherMode.ECB;
key.Padding = PaddingMode.PKCS7;
ICryptoTransform encryptor = key.CreateEncryptor();
byte[] encypted = encryptor.TransformFinalBlock(WellKnownUnpaddedData,
0, WellKnownUnpaddedData.Length);
Assert.Equal(8, encypted.Length);
// Расшифровываем без padding
key.Padding = PaddingMode.None;
ICryptoTransform decryptor = key.CreateDecryptor();
byte[] decrypted = decryptor.TransformFinalBlock(encypted,
0, encypted.Length);
// Один в один проверяем что ожидаем.
byte[] expected = new byte[] {
0x11, 0x22, 0x33,
0x05, 0x05, 0x05, 0x05,
0x05
};
Assert.Equal <byte>(expected, decrypted);
}
public void PaddingNone_UnpaddedEncrypt()
{
Gost28147CryptoServiceProvider key =
new Gost28147CryptoServiceProvider();
key.GenerateKey();
key.Mode = CipherMode.ECB;
key.Padding = PaddingMode.None;
ICryptoTransform encryptor = key.CreateEncryptor();
Assert.ThrowsAny <CryptographicException>(() => encryptor.TransformFinalBlock(WellKnownUnpaddedData,
0, WellKnownUnpaddedData.Length));
}
public void PaddingISO10126_Unpadded()
{
Gost28147CryptoServiceProvider key =
new Gost28147CryptoServiceProvider();
key.GenerateKey();
key.Mode = CipherMode.ECB;
key.Padding = PaddingMode.ISO10126;
ICryptoTransform encryptor = key.CreateEncryptor();
byte[] encypted = encryptor.TransformFinalBlock(WellKnownUnpaddedData,
0, WellKnownUnpaddedData.Length);
ICryptoTransform decryptor = key.CreateDecryptor();
byte[] decrypted = decryptor.TransformFinalBlock(encypted, 0, encypted.Length);
Assert.Equal(WellKnownUnpaddedData, decrypted);
}
public void PaddingZero_Unpadded()
{
Gost28147CryptoServiceProvider key =
new Gost28147CryptoServiceProvider();
key.GenerateKey();
key.Mode = CipherMode.ECB;
key.Padding = PaddingMode.Zeros;
ICryptoTransform encryptor = key.CreateEncryptor();
byte[] encypted = encryptor.TransformFinalBlock(WellKnownUnpaddedData,
0, WellKnownUnpaddedData.Length);
ICryptoTransform decryptor = key.CreateDecryptor();
byte[] decrypted = decryptor.TransformFinalBlock(encypted, 0, encypted.Length);
byte[] expected = new byte[] { 0x11, 0x22, 0x33, 0, 0, 0, 0, 0 };
Assert.Equal(expected, decrypted);
}
public void ResetNormal()
{
Gost28147CryptoServiceProvider key =
new Gost28147CryptoServiceProvider();
key.GenerateKey();
key.Mode = CipherMode.ECB;
key.Padding = PaddingMode.ANSIX923;
ICryptoTransform encryptor = key.CreateEncryptor();
ICryptoTransform decryptor = key.CreateDecryptor();
// Первое преобразование.
byte[] encrypted = encryptor.TransformFinalBlock(WellKnownUnpaddedData,
0, WellKnownUnpaddedData.Length);
byte[] decrypted = decryptor.TransformFinalBlock(encrypted, 0, encrypted.Length);
Assert.Equal(WellKnownUnpaddedData, decrypted);
// Второе преобразование, на тех же encryptor и decryptor
encrypted = encryptor.TransformFinalBlock(WellKnownUnpaddedData,
0, WellKnownUnpaddedData.Length);
decrypted = decryptor.TransformFinalBlock(encrypted, 0, encrypted.Length);
Assert.Equal(WellKnownUnpaddedData, decrypted);
}
