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39 lines
1.1 KiB
39 lines
1.1 KiB
2 months ago
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using System;
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using Org.BouncyCastle.Crypto.Parameters;
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using Org.BouncyCastle.Math;
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namespace Org.BouncyCastle.Crypto.Generators
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{
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/**
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* a Diffie-Hellman key pair generator.
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*
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* This generates keys consistent for use in the MTI/A0 key agreement protocol
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* as described in "Handbook of Applied Cryptography", Pages 516-519.
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*/
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public class DHKeyPairGenerator
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: IAsymmetricCipherKeyPairGenerator
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{
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private DHKeyGenerationParameters param;
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public virtual void Init(
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KeyGenerationParameters parameters)
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{
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this.param = (DHKeyGenerationParameters)parameters;
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}
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public virtual AsymmetricCipherKeyPair GenerateKeyPair()
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{
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DHKeyGeneratorHelper helper = DHKeyGeneratorHelper.Instance;
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DHParameters dhp = param.Parameters;
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BigInteger x = helper.CalculatePrivate(dhp, param.Random);
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BigInteger y = helper.CalculatePublic(dhp, x);
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return new AsymmetricCipherKeyPair(
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new DHPublicKeyParameters(y, dhp),
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new DHPrivateKeyParameters(x, dhp));
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}
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}
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}
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