public static string SHA256(byte[] data)
{
using var sha256 = Crypto.SHA256.Create();
var result = sha256.ComputeHash(data);
return(HexUtils.HexFromByteArray(result));
}
public static string SHA256(Stream stream)
{
using var sha256 = Crypto.SHA256.Create();
stream.Seek(0, SeekOrigin.Begin);
var result = sha256.ComputeHash(stream);
return(HexUtils.HexFromByteArray(result));
}
public static string TxInSignatureFromSignatureAndPublicKey(Signature signature, PublicKey publicKey)
{
var sb = StringBuilderPool.Acquire();
var bytes = signature.toDer();
HexUtils.AppendHexFromByteArray(sb, bytes);
sb.Append('.');
bytes = publicKey.toDer();
HexUtils.AppendHexFromByteArray(sb, bytes);
return(StringBuilderPool.GetStringAndRelease(sb));
}
public static (Signature, PublicKey) SignatureAndPublicKeyFromTxInSignature(string txInSignature)
{
int indexOfSeparator = txInSignature.IndexOf('.');
if (indexOfSeparator < 0)
{
return(null, null);
}
var bytes = HexUtils.ByteArrayFromHex(txInSignature, 0, indexOfSeparator);
var signature = Signature.fromDer(bytes);
bytes = HexUtils.ByteArrayFromHex(txInSignature, indexOfSeparator + 1, txInSignature.Length - indexOfSeparator - 1);
var publicKey = PublicKey.fromDer(bytes);
return(signature, publicKey);
}
public static bool TxInSignatureContainsPublicKey(string txInSignature, PublicKey publicKey)
{
int indexOfDelimiter = txInSignature.IndexOf('.');
if (indexOfDelimiter < 0)
{
return(false);
}
var publicKeyString = HexUtils.HexFromByteArray(publicKey.toDer());
if (txInSignature.Length < publicKeyString.Length)
{
return(false);
}
return(txInSignature.EndsWith(publicKeyString));
}
