init commit

output/Libraries/BouncyCastle.Crypto/Org/BouncyCastle/Crypto/BufferedStreamCipher.cs

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