/// <inheritdoc />
public override bool TrySignData(ReadOnlySpan <byte> privateKey, ReadOnlySpan <byte> data, Span <byte> destination,
out int bytesWritten)
{
if (destination.Length < SignatureLength)
{
bytesWritten = 0;
return(false);
}
EnsureInitialised();
// TODO: Generate random key if null
// EnsurePrivateKey();
var blsSecretKey = default(Bls384Interop.BlsSecretKey);
int bytesRead;
unsafe
{
fixed(byte *privateKeyPtr = privateKey)
{
bytesRead = Bls384Interop.SecretKeyDeserialize(ref blsSecretKey, privateKeyPtr, privateKey !.Length);
}
}
if (bytesRead != privateKey.Length)
{
throw new Exception($"Error deserializing BLS private key, length: {bytesRead}");
}
var blsSignature = default(Bls384Interop.BlsSignature);
unsafe
{
fixed(byte *dataPtr = data)
{
Bls384Interop.Sign(ref blsSignature, ref blsSecretKey, dataPtr, data.Length);
}
}
unsafe
{
fixed(byte *destinationPtr = destination)
{
bytesWritten = Bls384Interop.SignatureSerialize(destinationPtr, SignatureLength, ref blsSignature);
}
}
if (bytesWritten != SignatureLength)
{
throw new Exception($"Error serializing BLS signature, length: {bytesWritten}");
}
return(true);
}
