private void DoTestConsistency(Ed448.Algorithm algorithm, byte[] context)
{
Ed448KeyPairGenerator kpg = new Ed448KeyPairGenerator();
kpg.Init(new Ed448KeyGenerationParameters(Random));
AsymmetricCipherKeyPair kp = kpg.GenerateKeyPair();
Ed448PrivateKeyParameters privateKey = (Ed448PrivateKeyParameters)kp.Private;
Ed448PublicKeyParameters publicKey = (Ed448PublicKeyParameters)kp.Public;
byte[] msg = new byte[Random.NextInt() & 255];
Random.NextBytes(msg);
ISigner signer = CreateSigner(algorithm, context);
signer.Init(true, privateKey);
signer.BlockUpdate(msg, 0, msg.Length);
byte[] signature = signer.GenerateSignature();
ISigner verifier = CreateSigner(algorithm, context);
{
verifier.Init(false, publicKey);
verifier.BlockUpdate(msg, 0, msg.Length);
bool shouldVerify = verifier.VerifySignature(signature);
if (!shouldVerify)
{
Fail("Ed448(" + algorithm + ") signature failed to verify");
}
}
{
byte[] wrongLengthSignature = Arrays.Append(signature, 0x00);
verifier.Init(false, publicKey);
verifier.BlockUpdate(msg, 0, msg.Length);
bool shouldNotVerify = verifier.VerifySignature(wrongLengthSignature);
if (shouldNotVerify)
{
Fail("Ed448(" + algorithm + ") wrong length signature incorrectly verified");
}
}
{
byte[] badSignature = Arrays.Clone(signature);
badSignature[Random.Next() % badSignature.Length] ^= (byte)(1 << (Random.NextInt() & 7));
verifier.Init(false, publicKey);
verifier.BlockUpdate(msg, 0, msg.Length);
bool shouldNotVerify = verifier.VerifySignature(badSignature);
if (shouldNotVerify)
{
Fail("Ed448(" + algorithm + ") bad signature incorrectly verified");
}
}
}
/// <summary>
/// Create a key pair for by using a given curve
/// </summary>
/// <param name="curveName">the curve to use for key creation</param>
public void CreateKeyPair(string curveName)
{
var keyGenerationParameters = new Ed448KeyGenerationParameters(new SecureRandom());
var keyGenerator = new Ed448KeyPairGenerator();
keyGenerator.Init(keyGenerationParameters);
keyPair = keyGenerator.GenerateKeyPair();
}
/// <summary>
/// Generate key pair.
/// </summary>
/// <returns></returns>
public override AsymmetricCipherKeyPair GenerateKeyPair()
{
IAsymmetricCipherKeyPairGenerator generator = new Ed448KeyPairGenerator();
KeyGenerationParameters parameters = new Ed448KeyGenerationParameters(Common.ThreadSecureRandom.Value);
generator.Init(parameters);
return(generator.GenerateKeyPair());
}
