public static Key KeyExchange(KeyTypes keyType, Key privateKey, Key publicKey)
{
if (keyType == KeyTypes.Ed25519)
{
return(Ed25519Key.KeyExchangeInternal(privateKey as Ed25519Key, publicKey as Ed25519Key));
}
throw new ArgumentException(string.Format("Key type not implemented {0}", keyType));
}
public SigningTool(string ed25519KeyPath)
{
if (!File.Exists(ed25519KeyPath))
{
throw new ArgumentException("ed25519 Private Key file does not exist", nameof(ed25519KeyPath));
}
var key = Ed25519Key.FromFile(ed25519KeyPath);
_privateKey = Key.Import(_algorithm, key.ToBytes(), KeyBlobFormat.PkixPrivateKey);
}
public static Ed25519Key FromFile(this Ed25519Key key, string path)
{
if (!File.Exists(path))
{
throw new ArgumentException("Key file path is invalid", nameof(path));
}
var json = File.ReadAllText(path);
if (string.IsNullOrEmpty(json))
{
throw new ArgumentException("Provided file contains no data", nameof(path));
}
return(JsonSerializer.Deserialize <Ed25519Key>(json));
}
internal static Ed25519Key KeyExchangeInternal(Ed25519Key privateKey, Ed25519Key publicKey)
{
if (privateKey == null || !privateKey.IsPrivate)
{
throw new ArgumentException("Invalid Private Key", nameof(privateKey));
}
if (publicKey == null)
{
throw new ArgumentException("Invalid Public Key", nameof(privateKey));
}
var sharedKeyData = new byte[32];
Ed25519.KeyExchange(new ArraySegment <byte>(sharedKeyData), publicKey.RawData, privateKey.RawData);
return(new Ed25519Key(sharedKeyData));
}
public Verifier(Ed25519Key publicKey)
{
_signatureTool = new SignatureTool(publicKey);
}