private IIesEngine MakeIesEngine(bool isEncrypt, PublicKey publicKey, PrivateKey privateKey, byte[] iv)
{
AesEngine aesFastEngine = new AesEngine();
EthereumIesEngine iesEngine = new EthereumIesEngine(
new HMac(new Sha256Digest()),
new Sha256Digest(),
new BufferedBlockCipher(new SicBlockCipher(aesFastEngine)));
IesParameters iesParameters = new IesWithCipherParameters(new byte[] { }, new byte[] { }, KeySize, KeySize);
ParametersWithIV parametersWithIV = new ParametersWithIV(iesParameters, iv);
byte[] secret = Proxy.EcdhSerialized(publicKey.Bytes, privateKey.KeyBytes);
iesEngine.Init(isEncrypt, _optimizedKdf.Derive(secret), parametersWithIV);
return(iesEngine);
}
private static EthereumIesEngine MakeIesEngine(bool isEncrypt, ECPublicKeyParameters pub, ECPrivateKeyParameters prv, byte[] iv)
{
AesEngine aesFastEngine = new AesEngine();
EthereumIesEngine iesEngine = new EthereumIesEngine(
new ECDHBasicAgreement(),
new ConcatKdfBytesGenerator(new Sha256Digest()),
new HMac(new Sha256Digest()),
new Sha256Digest(),
new BufferedBlockCipher(new SicBlockCipher(aesFastEngine)));
IesParameters iseParameters = new IesWithCipherParameters(new byte[] { }, new byte[] { }, KeySize, KeySize);
ParametersWithIV parametersWithIV = new ParametersWithIV(iseParameters, iv);
iesEngine.Init(isEncrypt, prv, pub, parametersWithIV);
return(iesEngine);
}
private byte[] Decrypt(PublicKey ephemeralPublicKey, PrivateKey privateKey, byte[] iv, byte[] ciphertextBody, byte[] macData)
{
AesEngine aesFastEngine = new AesEngine();
EthereumIesEngine iesEngine = new EthereumIesEngine(
new ECDHBasicAgreement(),
new ConcatKdfBytesGenerator(new Sha256Digest()),
new HMac(new Sha256Digest()),
new Sha256Digest(),
new BufferedBlockCipher(new SicBlockCipher(aesFastEngine)));
IesParameters iesParameters = new IesWithCipherParameters(new byte[] { }, new byte[] { }, KeySize, KeySize);
ParametersWithIV parametersWithIV = new ParametersWithIV(iesParameters, iv);
ECPrivateKeyParameters privateKeyParameters = BouncyCrypto.WrapPrivateKey(privateKey);
ECPublicKeyParameters publicKeyParameters = BouncyCrypto.WrapPublicKey(ephemeralPublicKey);
iesEngine.Init(false, privateKeyParameters, publicKeyParameters, parametersWithIV);
return(iesEngine.ProcessBlock(ciphertextBody, 0, ciphertextBody.Length, macData));
}
