public string CheckPrivateKey(string key)
{
if (!b58End.HasValidChars(key))
{
return("The given key contains invalid base-58 characters.");
}
if (!b58End.HasValidCheckSum(key))
{
return("The given key has an invalid checksum.");
}
byte[] keyBa = b58End.DecodeWithCheckSum(key);
if (keyBa[0] != Constants.PrivKeyFirstByte)
{
return($"Invalid first key byte (actual={keyBa[0]}, expected={Constants.PrivKeyFirstByte}).");
}
if (keyBa.Length == 33)
{
if (!IsPrivateKeyInRange(keyBa.SubArray(1)))
{
return("Invalid key integer value (outside of the range defined by secp256k1 curve).");
}
return("The given key is a valid uncompressed private key.");
}
else if (keyBa.Length == 34)
{
if (keyBa[^ 1] != Constants.PrivKeyCompLastByte)
public string CheckBase58Bip38(string bip38)
{
if (!b58Enc.HasValidChars(bip38))
{
return("The given BIP-38 string contains invalid base-58 characters.");
}
if (!b58Enc.IsValid(bip38))
{
return("The given BIP-38 string has an invalid checksum.");
}
byte[] data = b58Enc.DecodeWithCheckSum(bip38);
if (data.Length != ConstantsFO.Bip38ByteLen)
{
return("The given BIP-38 string has an invalid byte length.");
}
if (data[0] != 1 || (data[1] != 0x42 && data[1] != 0x43))
{
return("The given BIP-38 string has invalid starting bytes.");
}
return("The given BIP-38 string is valid.");
}
public void HasValidCharsTest(string s, bool expected)
{
Assert.Equal(expected, encoder.HasValidChars(s));
}