GabrielTofvesson
bdbb1342ba
* Added new endpoint for updating password * Added internationalization method to ContextManager and Context * Updated contexts to use internationalization * Added a fancy text-based UI to the server * Added translations * Moved Promise class to its own file * Made BankNetInteractor its own file * Added a lot of convenient methods * Added many more comments * Fixed input event management in ButtonView * Added support for dynamic ListView content modification * Added more layouts * Fixed some namespaces * Added more commands to the server
35 lines
1.1 KiB
C#
35 lines
1.1 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Numerics;
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using System.Text;
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using System.Threading.Tasks;
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using Tofvesson.Crypto;
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namespace Tofvesson.Common.Cryptography.KeyExchange
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{
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public sealed class DiffieHellman : IKeyExchange
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{
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private static readonly BigInteger EPHEMERAL_MAX = BigInteger.One << 2048;
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private static readonly RandomProvider provider = new CryptoRandomProvider();
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private BigInteger priv, p, q;
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private readonly BigInteger pub;
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public DiffieHellman(BigInteger p, BigInteger q) : this(provider.GenerateRandom(EPHEMERAL_MAX), p, q) { }
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public DiffieHellman(BigInteger priv, BigInteger p, BigInteger q)
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{
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this.priv = priv;
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this.p = p;
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this.q = q;
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pub = Support.ModExp(p, priv, q);
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}
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public byte[] GetPublicKey() => pub.ToByteArray();
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public byte[] GetSharedSecret(byte[] p) {
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BigInteger pub = new BigInteger(p);
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return (pub <= 0 ? (BigInteger) 0 : Support.ModExp(pub, priv, q)).ToByteArray();
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}
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}
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}
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