/// <summary>
/// Gets P2PKH Bitcoin Address from a key
/// - Uses the compressed public key format for address generation
/// </summary>
/// <param name="publicKey">uncompressed public key (64 bytes)</param>
/// <param name="dsa">ECDsa algorithm interface</param>
/// <param name="version">Version bytes of bitcoin network (0x00 for mainnet)</param>
/// <param name="context">optional context</param>
/// <returns>Base58check bitcoin address</returns>
public static string GetP2PKHAddress(Span <byte> publicKey, IECDsa dsa, Span <byte> version, DisposableContext?context = null)
{
if (dsa == null)
{
throw new ArgumentException($"Invalid input parameters to '{nameof(GetP2PKHAddress)}'. '{nameof(dsa)}' cannot be null.");
}
var compressedPublicKey = dsa.GetSECCompressedPublicKey(publicKey, context);
return(compressedPublicKey.Hash().RIPEMD160().ToP2PKHAddress(version));
}
private Signature TestSign(IECDsa signer)
{
Key key = signer.CreateKey();
using var rnd = RandomNumberGenerator.Create();
var data = new byte[256];
rnd.GetBytes(data);
var signature = signer.SignData(data, key);
if (signer.VerifyData(data, signature, key))
{
return(signature);
}
throw new Exception();
}
private void TestRSAccessors(IECDsa signer)
{
Key key = signer.CreateKey();
using var rnd = RandomNumberGenerator.Create();
var data = new byte[32];
rnd.GetBytes(data);
var signature = signer.SignData(data, key);
var R = signature.GetR();
var S = signature.GetS();
Signature RS = new Signature {
Bytes = new byte[64]
};
RS.Set(R, S);
Assert.Equal(signature.Bytes.ToArray(), RS.Bytes.ToArray());
}
public static Span <byte> CreatePrivateKey(IECDsa ecdsa, int keyLength = 32)
{
if (ecdsa == null)
{
throw new CryptoException($"Invalid input to '{nameof(CreatePrivateKey)}'. '{nameof(ecdsa)}' should not be NULL.");
}
using (var rnd = RandomNumberGenerator.Create())
{
var privateKey = new byte[keyLength];
Key key;
do
{
rnd.GetBytes(privateKey);
key = new Key
{
PrivateKey = privateKey,
PublicKey = null
};
}while (!ecdsa.IsPrivateKeyValid(key));
return(privateKey);
}
}
/// <summary>
/// Gets P2PKH Bitcoin Address from a key
/// - Uses the compressed public key format for address generation
/// </summary>
/// <param name="key">key containing the public key</param>
/// <param name="dsa">ECDsa algorithm interface</param>
/// <param name="version">Version bytes of bitcoin network (0x00 for mainnet)</param>
/// <param name="context">optional context</param>
/// <returns>Base58check bitcoin address</returns>
public static string GetP2PKHAddress(Key key, IECDsa dsa, Span <byte> version, DisposableContext?context = null)
{
return(GetP2PKHAddress(key.PublicKey, dsa, version, context));
}