public void GenerateSignRecoverVerify(bool useBouncyCastle)
{
// Generate ECDSA keypair, compute a hash, sign it, then recover the public key from the signature and verify it matches.
EthereumEcdsa provider;
if (useBouncyCastle)
{
provider = EthereumEcdsaBouncyCastle.Generate(new SystemRandomAccountDerivation());
}
else
{
provider = EthereumEcdsaNative.Generate(new SystemRandomAccountDerivation());
}
// Sign a hash.
byte[] hash = KeccakHash.ComputeHashBytes(new byte[] { 11, 22, 33, 44 });
(byte RecoveryID, BigInteger r, BigInteger s)signature = provider.SignData(hash);
// Recover the public key for the signature we just made and verify it.
EthereumEcdsa recovered = null;
if (useBouncyCastle)
{
recovered = EthereumEcdsaBouncyCastle.Recover(hash, signature.RecoveryID, signature.r, signature.s);
}
else
{
recovered = EthereumEcdsaNative.Recover(hash, signature.RecoveryID, signature.r, signature.s);
}
Assert.True(provider.GetPublicKeyHash().ValuesEqual(recovered.GetPublicKeyHash()));
// Verify the signature we just made.
Assert.True(recovered.VerifyData(hash, signature.r, signature.s));
// Generate a new ECDSA keypair (to verify other keypairs can't pass verification for signatures they didn't create).
EthereumEcdsa provider2;
if (useBouncyCastle)
{
provider2 = EthereumEcdsaBouncyCastle.Generate(new SystemRandomAccountDerivation());
}
else
{
provider2 = EthereumEcdsaNative.Generate(new SystemRandomAccountDerivation());
}
// Verify the prior signature cannot be verified with this new keypair.
Assert.False(provider2.VerifyData(hash, signature.r, signature.s));
}
