public static byte[] Digest(byte[] data, String algo)
{
if (algo == null)
{
throw new ArgumentNullException("El algoritmo de huella digital no puede ser nulo");
}
if (data == null)
{
throw new ArgumentNullException("Los datos no pueden ser nulos");
}
switch (algo)
{
/**
* ALGORITMOS DE HASING
*/
case AOSignConstants.SIGN_ALGORITHM_SHA1:
{
Sha1Digest dig = new Sha1Digest();
dig.BlockUpdate(data, 0, data.Length);
byte[] result = new byte[dig.GetDigestSize()];
dig.DoFinal(result, 0);
return result;
}
case AOSignConstants.SIGN_ALGORITHM_SHA256:
{
Sha256Digest dig = new Sha256Digest();
dig.BlockUpdate(data, 0, data.Length);
byte[] result = new byte[dig.GetDigestSize()];
dig.DoFinal(result, 0);
return result;
}
case AOSignConstants.SIGN_ALGORITHM_SHA384:
{
Sha384Digest dig = new Sha384Digest();
dig.BlockUpdate(data, 0, data.Length);
byte[] result = new byte[dig.GetDigestSize()];
dig.DoFinal(result, 0);
return result;
}
case AOSignConstants.SIGN_ALGORITHM_SHA512:
{
Sha512Digest dig = new Sha512Digest();
dig.BlockUpdate(data, 0, data.Length);
byte[] result = new byte[dig.GetDigestSize()];
dig.DoFinal(result, 0);
return result;
}
case AOSignConstants.SIGN_ALGORITHM_RIPEMD160:
{
RipeMD160Digest dig = new RipeMD160Digest();
dig.BlockUpdate(data, 0, data.Length);
byte[] result = new byte[dig.GetDigestSize()];
dig.DoFinal(result, 0);
return result;
}
case AOSignConstants.SIGN_ALGORITHM_MD5:
{
MD5Digest dig = new MD5Digest();
dig.BlockUpdate(data, 0, data.Length);
byte[] result = new byte[dig.GetDigestSize()];
dig.DoFinal(result, 0);
return result;
}
case AOSignConstants.SIGN_ALGORITHM_MD2:
{
MD2Digest dig = new MD2Digest();
dig.BlockUpdate(data, 0, data.Length);
byte[] result = new byte[dig.GetDigestSize()];
dig.DoFinal(result, 0);
return result;
}
default:
// You can use the default case.
throw new ArgumentNullException("El algoritmo no es reconocido");
}
throw new ArgumentNullException("Algoritmo de hash no soportado: " + algo);
}
public ITestResult Perform()
{
IDigest digest = new RipeMD160Digest();
byte[] resBuf = new byte[digest.GetDigestSize()];
for (int i = 0; i < messages.Length; i++)
{
byte[] m = Encoding.ASCII.GetBytes(messages[i]);
digest.BlockUpdate(m, 0, m.Length);
digest.DoFinal(resBuf, 0);
if (!Arrays.AreEqual(resBuf, Hex.Decode(digests[i])))
{
return new SimpleTestResult(false, Name + ": Vector " + i + " failed");
}
}
//
// test 2
//
byte[] mm = Encoding.ASCII.GetBytes(messages[messages.Length-1]);
digest.BlockUpdate(mm, 0, mm.Length/2);
// clone the IDigest
IDigest d = new RipeMD160Digest((RipeMD160Digest)digest);
digest.BlockUpdate(mm, mm.Length/2, mm.Length - mm.Length/2);
digest.DoFinal(resBuf, 0);
if (!Arrays.AreEqual(resBuf, Hex.Decode(digests[digests.Length-1])))
{
return new SimpleTestResult(false,
"RipeMD160 failing clone test"
+ SimpleTest.NewLine
+ " expected: " + digests[digests.Length-1]
+ SimpleTest.NewLine
+ " got : " + Hex.ToHexString(resBuf));
}
d.BlockUpdate(mm, mm.Length/2, mm.Length - mm.Length/2);
d.DoFinal(resBuf, 0);
if (!Arrays.AreEqual(resBuf, Hex.Decode(digests[digests.Length-1])))
{
return new SimpleTestResult(false,
"RipeMD160 failing clone test - part 2"
+ SimpleTest.NewLine
+ " expected: " + digests[digests.Length-1]
+ SimpleTest.NewLine
+ " got : " + Hex.ToHexString(resBuf));
}
for (int i = 0; i < 1000000; i++)
{
digest.Update((byte)'a');
}
digest.DoFinal(resBuf, 0);
if (!Arrays.AreEqual(resBuf, Hex.Decode(MillionADigest)))
{
return new SimpleTestResult(false, Name + ": Million a's failed");
}
return new SimpleTestResult(true, Name + ": Okay");
}
