/// <summary>
/// Creates the signature.
/// </summary>
/// <param name="input">The input.</param>
/// <returns>
/// Signed input data.
/// </returns>
public override byte[] Sign(byte[] input)
{
#if NETSTANDARD2_0
var signed = _key.Ecdsa.SignData(input, _key.HashAlgorithm);
#else
var ecdsa = (ECDsaCng)_key.Ecdsa;
ecdsa.HashAlgorithm = _key.HashAlgorithm;
var signed = ecdsa.SignData(input);
#endif
var ssh_data = new SshDataSignature(signed.Length);
ssh_data.Signature = signed;
return(ssh_data.GetBytes());
}
/// <summary>
/// Verifies the signature.
/// </summary>
/// <param name="input">The input.</param>
/// <param name="signature">The signature.</param>
/// <returns>
/// <c>true</c> if signature was successfully verified; otherwise <c>false</c>.
/// </returns>
public override bool Verify(byte[] input, byte[] signature)
{
// for 521 sig_size is 132
var sig_size = _key.KeyLength == 521 ? 132 : _key.KeyLength / 4;
var ssh_data = new SshDataSignature(signature, sig_size);
#if NETSTANDARD2_0
return(_key.Ecdsa.VerifyData(input, ssh_data.Signature, _key.HashAlgorithm));
#else
var ecdsa = (ECDsaCng)_key.Ecdsa;
ecdsa.HashAlgorithm = _key.HashAlgorithm;
return(ecdsa.VerifyData(input, ssh_data.Signature));
#endif
}