private void EnsurePublicKey()
{
if (_publicKey == null)
{
if (_privateKey != null)
{
EnsureInitialised();
// Standard values are big endian encoding (are using the Herumi deserialize / serialize)
var blsSecretKey = default(Bls384Interop.BlsSecretKey);
int bytesRead;
unsafe
{
fixed(byte *ptr = _privateKey)
{
bytesRead = Bls384Interop.SecretKeyDeserialize(ref blsSecretKey, ptr, _privateKey.Length);
}
}
if (bytesRead != _privateKey.Length)
{
throw new Exception($"Error deserializing BLS private key, length: {bytesRead}");
}
var blsPublicKey = default(Bls384Interop.BlsPublicKey);
Bls384Interop.GetPublicKey(ref blsPublicKey, ref blsSecretKey);
var buffer = new Span <byte>(new byte[PublicKeyLength]);
int bytesWritten;
unsafe
{
fixed(byte *ptr = buffer)
{
bytesWritten = Bls384Interop.PublicKeySerialize(ptr, buffer.Length, ref blsPublicKey);
}
}
if (bytesWritten != buffer.Length)
{
throw new Exception($"Error serializing BLS public key, length: {bytesWritten}");
}
_publicKey = buffer.ToArray();
}
}
}