public ECDiffieHellman(int keySize, KeyAgreementKeyDerivationFunction kdFunc, KeyAgreementKeyDerivationHashAlgorithm hashAlgo)
: base(kdFunc, hashAlgo)
{
ECDiffieHellmanCng ecdh = new ECDiffieHellmanCng(keySize);
ecdh.KeyDerivationFunction = ECDiffieHellmanKeyDerivationFunction.Hash;
switch (hashAlgo)
{
case KeyAgreementKeyDerivationHashAlgorithm.SHA256:
ecdh.HashAlgorithm = CngAlgorithm.Sha256;
break;
case KeyAgreementKeyDerivationHashAlgorithm.SHA384:
ecdh.HashAlgorithm = CngAlgorithm.Sha384;
break;
case KeyAgreementKeyDerivationHashAlgorithm.SHA512:
ecdh.HashAlgorithm = CngAlgorithm.Sha512;
break;
default:
throw new CryptoException("Key derivation hash algorithm not supported.");
}
_ecdh = ecdh;
}
public DiffieHellman(DiffieHellmanPublicKey publicKey, KeyAgreementKeyDerivationFunction kdFunc, KeyAgreementKeyDerivationHashAlgorithm kdHashAlgo)
: base(kdFunc, kdHashAlgo)
{
_group = DiffieHellmanGroupType.None;
_keySize = publicKey.KeySize;
_p = publicKey.P;
_g = publicKey.G;
_privateKey = GeneratePrivateKey(_p);
}
public DiffieHellman(DiffieHellmanPublicKey publicKey, KeyAgreementKeyDerivationFunction kdFunc, KeyAgreementKeyDerivationHashAlgorithm kdHashAlgo)
: base(kdFunc, kdHashAlgo)
{
_keySize = publicKey.KeySize;
_p = publicKey.P;
_g = publicKey.G;
GeneratePrivateKey();
}
public DiffieHellman(DiffieHellmanGroupType group, KeyAgreementKeyDerivationFunction kdFunc, KeyAgreementKeyDerivationHashAlgorithm kdHashAlgo)
: base(kdFunc, kdHashAlgo)
{
_group = group;
DiffieHellmanGroup dhg = DiffieHellmanGroup.GetGroup(_group);
_keySize = dhg.KeySize;
_p = dhg.P;
_g = dhg.G;
_privateKey = GeneratePrivateKey(_p);
}
public KeyAgreement(KeyAgreementKeyDerivationFunction kdFunc, KeyAgreementKeyDerivationHashAlgorithm kdHashAlgo)
{
_kdFunc = kdFunc;
_kdHashAlgo = kdHashAlgo;
}
