<PackageReference Include="BouncyCastle.Cryptography" Version="2.7.0" />

Org.BouncyCastle.Bcpg.SecretSubkeyPacket

public class SecretSubkeyPacket : SecretKeyPacket
Basic packet for a PGP secret key.
public SecretSubkeyPacket(PublicKeyPacket pubKeyPacket, SymmetricKeyAlgorithmTag encAlgorithm, S2k s2k, byte[] iv, byte[] secKeyData)

public SecretSubkeyPacket(PublicKeyPacket pubKeyPacket, SymmetricKeyAlgorithmTag encAlgorithm, int s2kUsage, S2k s2k, byte[] iv, byte[] secKeyData)

public SecretSubkeyPacket(PublicKeyPacket pubKeyPacket, SymmetricKeyAlgorithmTag encAlgorithm, AeadAlgorithmTag aeadAlgorithm, int s2kUsage, S2k s2k, byte[] iv, byte[] secKeyData)