/// <summary>
/// Get checksum calculator for given checksum type.
/// </summary>
/// <param name="impl">Checksum type.</param>
/// <returns>Checksum calculator.</returns>
public static ICheckSum GetImplementation(CheckSumType impl)
{
ICheckSum sum;
switch (impl)
{
case CheckSumType.SHA1:
sum = new Sha1Sum();
break;
case CheckSumType.MD5:
sum = new Md5Sum();
break;
case CheckSumType.CRC32:
sum = new CRC32Sum();
break;
default:
sum = new Sha1Sum();
#if DEBUG
throw new ApplicationException("Unknown Sum type!");
#else
break;
#endif
}
return sum;
}
public void VerifyNullSumData()
{
byte[] fileArray = File.ReadAllBytes("../../TestData/TextFile1.txt");
CRC32Sum sum = new CRC32Sum();
bool correct = sum.Verify(fileArray, null);
}
public void VerifyNullSumStream()
{
FileStream file = new FileStream("../../TestData/TextFile1.txt",
FileMode.Open);
CRC32Sum sum = new CRC32Sum();
try
{
bool correct = sum.Verify(file, null);
}
catch
{
throw;
}
finally
{
// Make sure stream is closed.
file.Close();
}
}
public void VerifyNullByteData()
{
CRC32Sum sum = new CRC32Sum();
bool correct = sum.Verify((byte[])null, new byte[4]);
}
public void VerifyNullStream()
{
CRC32Sum sum = new CRC32Sum();
bool correct = sum.Verify((Stream)null, new byte[4]);
}
public void VerifyFile1Stream()
{
FileStream file = new FileStream("../../TestData/TextFile1.txt",
FileMode.Open);
CRC32Sum sum = new CRC32Sum();
bool correct = sum.Verify(file, File1Sum);
file.Close();
Assert.IsTrue(correct);
}
public void VerifyFile1StreamFail()
{
FileStream file = new FileStream("../../TestData/TextFile1.txt",
FileMode.Open);
CRC32Sum sum = new CRC32Sum();
// Create invalid checksum
byte[] invalidSum = new byte[4];
Array.Copy(File1Sum, invalidSum, 4);
invalidSum[1] = 0x00;
bool correct = sum.Verify(file, invalidSum);
file.Close();
Assert.IsFalse(correct);
}
public void VerifyFile1ByteArray()
{
byte[] fileArray = File.ReadAllBytes("../../TestData/TextFile1.txt");
CRC32Sum sum = new CRC32Sum();
bool correct = sum.Verify(fileArray, File1Sum);
Assert.IsTrue(correct);
}
public void CalculateNullStream()
{
CRC32Sum sum = new CRC32Sum();
byte[] check = sum.Calculate((Stream)null);
}
public void CalculateNullArray()
{
CRC32Sum sum = new CRC32Sum();
byte[] check = sum.Calculate((byte[])null);
}
public void CalculateFile1Stream()
{
FileStream file = new FileStream("../../TestData/TextFile1.txt",
FileMode.Open);
CRC32Sum sum = new CRC32Sum();
byte[] check = sum.Calculate(file);
file.Close();
Assert.IsNotNull(check);
Assert.AreEqual(4, check.Length);
for (int i = 0; i < File1Sum.Length; i++)
{
if (check[i] != File1Sum[i])
{
Assert.Fail("Result byte {0} does not match! Was {1:x2}, expected {2:x2}",
i, check[i], File1Sum[i]);
}
}
}
public void CalculateFile1ByteArray()
{
CRC32Sum sum = new CRC32Sum();
byte[] array = File.ReadAllBytes("../../TestData/TextFile1.txt");
byte[] check = sum.Calculate(array);
Assert.IsNotNull(check);
Assert.AreEqual(4, check.Length);
for (int i = 0; i < File1Sum.Length; i++)
{
if (check[i] != File1Sum[i])
{
Assert.Fail("Result byte {0} does not match! Was {1}, expected {2}",
i, check[i], File1Sum[i]);
}
}
}
