public void TestSignAndVerifyHash()
{
byte[] data = new byte[100];
new Random().NextBytes(data);
foreach (HashAlgorithm ha in new HashAlgorithm[] { MD5.Create(), SHA1.Create(), SHA256.Create(), SHA384.Create(), SHA512.Create() })
{
Hash hash = Hash.FromBytes(ha.ComputeHash(data));
Assert.AreEqual(CryptoConfig.MapNameToOID(ha.GetType().FullName), hash.AlgorithmOID);
using (RSAPrivateKey key = new RSAPrivateKey())
{
byte[] sig = key.SignHash(hash);
using (RSAPublicKey pub = key.PublicKey)
{
Assert.IsTrue(pub.VerifyHash(sig, Hash.FromBytes(ha.ComputeHash(data))));
data[0] = (byte)~data[0];
Assert.IsFalse(pub.VerifyHash(sig, Hash.FromBytes(ha.ComputeHash(data))));
}
}
}
}