103 lines
1.9 KiB
C#
103 lines
1.9 KiB
C#
using System;
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using System.IO;
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using Org.BouncyCastle.Crypto.Engines;
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using Org.BouncyCastle.Utilities;
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namespace Org.BouncyCastle.Crypto;
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public class BufferedIesCipher : BufferedCipherBase
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{
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private readonly IesEngine engine;
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private bool forEncryption;
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private MemoryStream buffer = new MemoryStream();
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public override string AlgorithmName => "IES";
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public BufferedIesCipher(IesEngine engine)
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{
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if (engine == null)
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{
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throw new ArgumentNullException("engine");
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}
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this.engine = engine;
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}
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public override void Init(bool forEncryption, ICipherParameters parameters)
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{
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this.forEncryption = forEncryption;
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throw Platform.CreateNotImplementedException("IES");
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}
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public override int GetBlockSize()
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{
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return 0;
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}
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public override int GetOutputSize(int inputLen)
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{
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if (engine == null)
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{
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throw new InvalidOperationException("cipher not initialised");
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}
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int num = inputLen + (int)buffer.Length;
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if (!forEncryption)
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{
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return num - 20;
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}
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return num + 20;
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}
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public override int GetUpdateOutputSize(int inputLen)
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{
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return 0;
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}
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public override byte[] ProcessByte(byte input)
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{
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buffer.WriteByte(input);
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return null;
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}
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public override byte[] ProcessBytes(byte[] input, int inOff, int length)
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{
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if (input == null)
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{
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throw new ArgumentNullException("input");
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}
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if (inOff < 0)
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{
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throw new ArgumentException("inOff");
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}
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if (length < 0)
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{
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throw new ArgumentException("length");
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}
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if (inOff + length > input.Length)
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{
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throw new ArgumentException("invalid offset/length specified for input array");
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}
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buffer.Write(input, inOff, length);
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return null;
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}
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public override byte[] DoFinal()
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{
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byte[] array = buffer.ToArray();
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Reset();
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return engine.ProcessBlock(array, 0, array.Length);
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}
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public override byte[] DoFinal(byte[] input, int inOff, int length)
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{
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ProcessBytes(input, inOff, length);
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return DoFinal();
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}
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public override void Reset()
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{
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buffer.SetLength(0L);
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}
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}
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