public static void GetCiphertextLengthBlock_ThrowsForNonByteBlockSize(PaddingMode mode)
{
AnySizeAlgorithm alg = new AnySizeAlgorithm {
BlockSize = 5
};
Assert.Throws <InvalidOperationException>(() => alg.GetCiphertextLengthCbc(16, mode));
Assert.Throws <InvalidOperationException>(() => alg.GetCiphertextLengthEcb(16, mode));
}
public static void GetCiphertextLengthBlock_NoPaddingAndPlaintextSizeNotBlockAligned()
{
AnySizeAlgorithm alg = new AnySizeAlgorithm {
BlockSize = 128
};
Assert.Throws <ArgumentException>("plaintextLength", () => alg.GetCiphertextLengthCbc(17, PaddingMode.None));
Assert.Throws <ArgumentException>("plaintextLength", () => alg.GetCiphertextLengthEcb(17, PaddingMode.None));
}
public static void GetCiphertextLength_ThrowsForInvalidPaddingMode()
{
AnySizeAlgorithm alg = new AnySizeAlgorithm {
BlockSize = 128
};
PaddingMode mode = (PaddingMode)(-1);
Assert.Throws <ArgumentOutOfRangeException>("paddingMode", () => alg.GetCiphertextLengthCbc(16, mode));
Assert.Throws <ArgumentOutOfRangeException>("paddingMode", () => alg.GetCiphertextLengthEcb(16, mode));
Assert.Throws <ArgumentOutOfRangeException>("paddingMode", () => alg.GetCiphertextLengthCfb(16, mode));
}
public static void GetCiphertextLengthBlock_ValidInputs(
PaddingMode mode,
int plaintextSize,
int expectedCiphertextSize,
int alignmentSizeInBits)
{
AnySizeAlgorithm alg = new AnySizeAlgorithm {
BlockSize = alignmentSizeInBits
};
int ciphertextSizeCbc = alg.GetCiphertextLengthCbc(plaintextSize, mode);
int ciphertextSizeEcb = alg.GetCiphertextLengthEcb(plaintextSize, mode);
Assert.Equal(expectedCiphertextSize, ciphertextSizeCbc);
Assert.Equal(expectedCiphertextSize, ciphertextSizeEcb);
}
public static void GetCiphertextLengthBlock_ThrowsForOverflow(PaddingMode mode)
{
AnySizeAlgorithm alg = new AnySizeAlgorithm {
BlockSize = 128
};
AssertExtensions.Throws <ArgumentOutOfRangeException>("plaintextLength", () => alg.GetCiphertextLengthCbc(0x7FFFFFF1, mode));
AssertExtensions.Throws <ArgumentOutOfRangeException>("plaintextLength", () => alg.GetCiphertextLengthEcb(0x7FFFFFF1, mode));
}
public static void GetCiphertextLength_ThrowsForNegativeInput(PaddingMode mode)
{
AnySizeAlgorithm alg = new AnySizeAlgorithm {
BlockSize = 128
};
AssertExtensions.Throws <ArgumentOutOfRangeException>("plaintextLength", () => alg.GetCiphertextLengthCbc(-1, mode));
AssertExtensions.Throws <ArgumentOutOfRangeException>("plaintextLength", () => alg.GetCiphertextLengthEcb(-1, mode));
AssertExtensions.Throws <ArgumentOutOfRangeException>("plaintextLength", () => alg.GetCiphertextLengthCfb(-1, mode));
}