106 lines
2.0 KiB
C#
106 lines
2.0 KiB
C#
using System;
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using Org.BouncyCastle.Crypto.Parameters;
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namespace Org.BouncyCastle.Crypto;
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public class BufferedStreamCipher : BufferedCipherBase
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{
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private readonly IStreamCipher cipher;
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public override string AlgorithmName => cipher.AlgorithmName;
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public BufferedStreamCipher(IStreamCipher cipher)
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{
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if (cipher == null)
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{
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throw new ArgumentNullException("cipher");
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}
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this.cipher = cipher;
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}
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public override void Init(bool forEncryption, ICipherParameters parameters)
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{
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if (parameters is ParametersWithRandom)
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{
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parameters = ((ParametersWithRandom)parameters).Parameters;
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}
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cipher.Init(forEncryption, parameters);
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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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return inputLen;
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}
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public override int GetUpdateOutputSize(int inputLen)
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{
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return inputLen;
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}
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public override byte[] ProcessByte(byte input)
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{
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return new byte[1] { cipher.ReturnByte(input) };
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}
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public override int ProcessByte(byte input, byte[] output, int outOff)
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{
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if (outOff >= output.Length)
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{
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throw new DataLengthException("output buffer too short");
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}
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output[outOff] = cipher.ReturnByte(input);
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return 1;
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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 (length < 1)
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{
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return null;
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}
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byte[] array = new byte[length];
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cipher.ProcessBytes(input, inOff, length, array, 0);
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return array;
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}
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public override int ProcessBytes(byte[] input, int inOff, int length, byte[] output, int outOff)
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{
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if (length < 1)
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{
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return 0;
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}
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if (length > 0)
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{
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cipher.ProcessBytes(input, inOff, length, output, outOff);
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}
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return length;
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}
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public override byte[] DoFinal()
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{
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Reset();
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return BufferedCipherBase.EmptyBuffer;
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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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if (length < 1)
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{
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return BufferedCipherBase.EmptyBuffer;
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}
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byte[] result = ProcessBytes(input, inOff, length);
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Reset();
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return result;
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}
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public override void Reset()
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{
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cipher.Reset();
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}
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}
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