init commit

2025-10-09 09:57:24 +09:00
commit 4d551bd74f
6636 changed files with 1218703 additions and 0 deletions
--- a/output/Libraries/BouncyCastle.Crypto/Org/BouncyCastle/Crypto/Modes/CbcBlockCipher.cs
+++ b/output/Libraries/BouncyCastle.Crypto/Org/BouncyCastle/Crypto/Modes/CbcBlockCipher.cs
@@ -0,0 +1,125 @@
+using System;
+using Org.BouncyCastle.Crypto.Parameters;
+
+namespace Org.BouncyCastle.Crypto.Modes;
+
+public class CbcBlockCipher : IBlockCipher
+{
+	private byte[] IV;
+
+	private byte[] cbcV;
+
+	private byte[] cbcNextV;
+
+	private int blockSize;
+
+	private IBlockCipher cipher;
+
+	private bool encrypting;
+
+	public string AlgorithmName => cipher.AlgorithmName + "/CBC";
+
+	public bool IsPartialBlockOkay => false;
+
+	public CbcBlockCipher(IBlockCipher cipher)
+	{
+		this.cipher = cipher;
+		blockSize = cipher.GetBlockSize();
+		IV = new byte[blockSize];
+		cbcV = new byte[blockSize];
+		cbcNextV = new byte[blockSize];
+	}
+
+	public IBlockCipher GetUnderlyingCipher()
+	{
+		return cipher;
+	}
+
+	public void Init(bool forEncryption, ICipherParameters parameters)
+	{
+		bool flag = encrypting;
+		encrypting = forEncryption;
+		if (parameters is ParametersWithIV)
+		{
+			ParametersWithIV parametersWithIV = (ParametersWithIV)parameters;
+			byte[] iV = parametersWithIV.GetIV();
+			if (iV.Length != blockSize)
+			{
+				throw new ArgumentException("initialisation vector must be the same length as block size");
+			}
+			Array.Copy(iV, 0, IV, 0, iV.Length);
+			parameters = parametersWithIV.Parameters;
+		}
+		Reset();
+		if (parameters != null)
+		{
+			cipher.Init(encrypting, parameters);
+		}
+		else if (flag != encrypting)
+		{
+			throw new ArgumentException("cannot change encrypting state without providing key.");
+		}
+	}
+
+	public int GetBlockSize()
+	{
+		return cipher.GetBlockSize();
+	}
+
+	public int ProcessBlock(byte[] input, int inOff, byte[] output, int outOff)
+	{
+		if (!encrypting)
+		{
+			return DecryptBlock(input, inOff, output, outOff);
+		}
+		return EncryptBlock(input, inOff, output, outOff);
+	}
+
+	public void Reset()
+	{
+		Array.Copy(IV, 0, cbcV, 0, IV.Length);
+		Array.Clear(cbcNextV, 0, cbcNextV.Length);
+		cipher.Reset();
+	}
+
+	private int EncryptBlock(byte[] input, int inOff, byte[] outBytes, int outOff)
+	{
+		if (inOff + blockSize > input.Length)
+		{
+			throw new DataLengthException("input buffer too short");
+		}
+		for (int i = 0; i < blockSize; i++)
+		{
+			byte[] array2;
+			byte[] array = (array2 = cbcV);
+			int num = i;
+			nint num2 = num;
+			array[num] = (byte)(array2[num2] ^ input[inOff + i]);
+		}
+		int result = cipher.ProcessBlock(cbcV, 0, outBytes, outOff);
+		Array.Copy(outBytes, outOff, cbcV, 0, cbcV.Length);
+		return result;
+	}
+
+	private int DecryptBlock(byte[] input, int inOff, byte[] outBytes, int outOff)
+	{
+		if (inOff + blockSize > input.Length)
+		{
+			throw new DataLengthException("input buffer too short");
+		}
+		Array.Copy(input, inOff, cbcNextV, 0, blockSize);
+		int result = cipher.ProcessBlock(input, inOff, outBytes, outOff);
+		for (int i = 0; i < blockSize; i++)
+		{
+			byte[] array2;
+			byte[] array = (array2 = outBytes);
+			int num = outOff + i;
+			nint num2 = num;
+			array[num] = (byte)(array2[num2] ^ cbcV[i]);
+		}
+		byte[] array3 = cbcV;
+		cbcV = cbcNextV;
+		cbcNextV = array3;
+		return result;
+	}
+}