45 lines
1.3 KiB
C#
45 lines
1.3 KiB
C#
#if !BESTHTTP_DISABLE_ALTERNATE_SSL && (!UNITY_WEBGL || UNITY_EDITOR)
|
|
#pragma warning disable
|
|
using System;
|
|
|
|
using Best.HTTP.SecureProtocol.Org.BouncyCastle.Crypto.Parameters;
|
|
using Best.HTTP.SecureProtocol.Org.BouncyCastle.Math;
|
|
|
|
namespace Best.HTTP.SecureProtocol.Org.BouncyCastle.Crypto.Generators
|
|
{
|
|
/**
|
|
* a ElGamal key pair generator.
|
|
* <p>
|
|
* This Generates keys consistent for use with ElGamal as described in
|
|
* page 164 of "Handbook of Applied Cryptography".</p>
|
|
*/
|
|
public class ElGamalKeyPairGenerator
|
|
: IAsymmetricCipherKeyPairGenerator
|
|
{
|
|
private ElGamalKeyGenerationParameters param;
|
|
|
|
public void Init(
|
|
KeyGenerationParameters parameters)
|
|
{
|
|
this.param = (ElGamalKeyGenerationParameters) parameters;
|
|
}
|
|
|
|
public AsymmetricCipherKeyPair GenerateKeyPair()
|
|
{
|
|
DHKeyGeneratorHelper helper = DHKeyGeneratorHelper.Instance;
|
|
ElGamalParameters egp = param.Parameters;
|
|
DHParameters dhp = new DHParameters(egp.P, egp.G, null, 0, egp.L);
|
|
|
|
BigInteger x = helper.CalculatePrivate(dhp, param.Random);
|
|
BigInteger y = helper.CalculatePublic(dhp, x);
|
|
|
|
return new AsymmetricCipherKeyPair(
|
|
new ElGamalPublicKeyParameters(y, egp),
|
|
new ElGamalPrivateKeyParameters(x, egp));
|
|
}
|
|
}
|
|
|
|
}
|
|
#pragma warning restore
|
|
#endif
|