67 lines
1.4 KiB
C#
67 lines
1.4 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Text;
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namespace Lidgren.Network
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{
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/// <summary>
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/// Example class; not very good encryption
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/// </summary>
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public class NetXorEncryption : NetEncryption
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{
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private byte[] m_key;
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/// <summary>
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/// NetXorEncryption constructor
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/// </summary>
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public NetXorEncryption(NetPeer peer, byte[] key)
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: base(peer)
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{
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m_key = key;
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}
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public override void SetKey(byte[] data, int offset, int count)
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{
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m_key = new byte[count];
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Array.Copy(data, offset, m_key, 0, count);
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}
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/// <summary>
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/// NetXorEncryption constructor
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/// </summary>
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public NetXorEncryption(NetPeer peer, string key)
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: base(peer)
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{
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m_key = Encoding.UTF8.GetBytes(key);
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}
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/// <summary>
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/// Encrypt an outgoing message
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/// </summary>
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public override bool Encrypt(NetOutgoingMessage msg)
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{
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int numBytes = msg.LengthBytes;
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for (int i = 0; i < numBytes; i++)
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{
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int offset = i % m_key.Length;
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msg.m_data[i] = (byte)(msg.m_data[i] ^ m_key[offset]);
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}
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return true;
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}
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/// <summary>
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/// Decrypt an incoming message
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/// </summary>
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public override bool Decrypt(NetIncomingMessage msg)
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{
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int numBytes = msg.LengthBytes;
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for (int i = 0; i < numBytes; i++)
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{
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int offset = i % m_key.Length;
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msg.m_data[i] = (byte)(msg.m_data[i] ^ m_key[offset]);
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}
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return true;
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}
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}
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}
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