/// <summary>
/// Inits the instance for encryption.
/// </summary>
/// <param name="privateKey">The private key.</param>
/// <param name="publicKey">The public key.</param>
public void InitForDecryption(ECDHPrivateKeyParameters privateKey, ECDHPublicKeyParameters publicKey)
{
_fingerPrint = (byte[])privateKey.FingerPrint.Clone();
_privateKey = privateKey;
_publicKey = publicKey;
_forEncryption = false;
}
private byte[] ProcessSymmetricKeyDataForEcdh(IPgpPrivateKey privKey, IList <IBigInteger> symmetricKeyData)
{
var encSymKey = symmetricKeyData[1].ToByteArrayUnsigned();
var privateKey = (ECDHPrivateKeyParameters)privKey.Key;
var publicKey = privateKey.PublicKeyParameters;
var ephemeralKey = ECDHPublicKeyParameters.Create(symmetricKeyData[0], publicKey.PublicKeyParamSet, publicKey.HashAlgorithm, publicKey.SymmetricKeyAlgorithm);
var engine = new RFC6637ECDHEngine();
engine.InitForDecryption(privateKey, ephemeralKey);
return(engine.ProcessBlock(encSymKey, 0, encSymKey.Length));
}
public void InitForEncryption(ISecureRandom random, ECDHPublicKeyParameters publicKey, byte[] fingerPrint, out ECDHPublicKeyParameters ephemeralPublicKey)
{
var genParams = publicKey.CreateKeyGenerationParameters(random, publicKey.HashAlgorithm, publicKey.SymmetricKeyAlgorithm);
var generator = new ECKeyPairGenerator("ECDH");
generator.Init(genParams);
var ephemeralKeyPair = generator.GenerateKeyPair();
_fingerPrint = (byte[])fingerPrint.Clone();
_privateKey = (ECPrivateKeyParameters)ephemeralKeyPair.Private;
_publicKey = publicKey;
_forEncryption = true;
ephemeralPublicKey = (ECDHPublicKeyParameters)ephemeralKeyPair.Public;
}
