private void BasicSigTest()
{
Ed448PrivateKeyParameters privateKey = new Ed448PrivateKeyParameters(
Hex.DecodeStrict(
"6c82a562cb808d10d632be89c8513ebf" +
"6c929f34ddfa8c9f63c9960ef6e348a3" +
"528c8a3fcc2f044e39a3fc5b94492f8f" +
"032e7549a20098f95b"), 0);
Ed448PublicKeyParameters publicKey = new Ed448PublicKeyParameters(
Hex.DecodeStrict("5fd7449b59b461fd2ce787ec616ad46a" +
"1da1342485a70e1f8a0ea75d80e96778" +
"edf124769b46c7061bd6783df1e50f6c" +
"d1fa1abeafe8256180"), 0);
byte[] sig = Hex.DecodeStrict("533a37f6bbe457251f023c0d88f976ae" +
"2dfb504a843e34d2074fd823d41a591f" +
"2b233f034f628281f2fd7a22ddd47d78" +
"28c59bd0a21bfd3980ff0d2028d4b18a" +
"9df63e006c5d1c2d345b925d8dc00b41" +
"04852db99ac5c7cdda8530a113a0f4db" +
"b61149f05a7363268c71d95808ff2e65" +
"2600");
ISigner signer = new Ed448Signer(new byte[0]);
signer.Init(true, privateKey);
IsTrue(AreEqual(sig, signer.GenerateSignature()));
signer.Init(false, publicKey);
IsTrue(signer.VerifySignature(sig));
}
/// <summary>
/// Verifies a signature to be authentic
/// </summary>
/// <param name="originalSignature">The signature which is be verified</param>
/// <param name="publicKey">the public key used for the verification</param>
/// <param name="data">the data which is signed</param>
/// <returns>true if signature is authentic, false if not</returns>
public bool Verify(byte[] originalSignature, byte[] publicKey, byte[] data)
{
Ed448PublicKeyParameters pubKey = null;
try
{
pubKey = (Ed448PublicKeyParameters)CreateAsymmetricKeyParameterFromPublicKeyInfo(publicKey);
}
catch (InvalidCastException exception)
{
string message = "Public Key Import Failed!\n" +
$"{exception.Message}.\n" +
"The contents of the source do not represent a valid Ed448 key parameter\n" +
"Verify that the key is not corrupted.\n" +
"- or - Verify that the correct key is selected.";
throw new CryptoException(message, exception);
}
var signer = new Ed448Signer(ByteConvert.StringToAsciiBytes("context"));
signer.Init(false, pubKey);
signer.BlockUpdate(data, 0, data.Length);
return(signer.VerifySignature(originalSignature));
}