297 lines
12 KiB
C#
297 lines
12 KiB
C#
//------------------------------------------------------------
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// Game Framework
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// Copyright © 2013-2020 Jiang Yin. All rights reserved.
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// Homepage: https://gameframework.cn/
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// Feedback: mailto:ellan@gameframework.cn
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//------------------------------------------------------------
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using System;
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using System.Security.Cryptography;
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using System.Text;
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namespace ET
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{
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public static partial class Utility
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{
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/// <summary>
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/// 加密解密相关的实用函数。
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/// </summary>
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public static class Encryption
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{
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public const int QuickEncryptLength = 220;
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/// <summary>
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/// 将 bytes 使用 code 做异或运算的快速版本。
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/// </summary>
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/// <param name="bytes">原始二进制流。</param>
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/// <param name="code">异或二进制流。</param>
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/// <returns>异或后的二进制流。</returns>
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public static byte[] GetQuickXorBytes(byte[] bytes, byte[] code)
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{
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return GetXorBytes(bytes, code, QuickEncryptLength);
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}
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/// <summary>
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/// 将 bytes 使用 code 做异或运算的快速版本。此方法将复用并改写传入的 bytes 作为返回值，而不额外分配内存空间。
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/// </summary>
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/// <param name="bytes">原始及异或后的二进制流。</param>
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/// <param name="code">异或二进制流。</param>
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public static void GetQuickSelfXorBytes(byte[] bytes, byte[] code)
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{
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GetSelfXorBytes(bytes, code, QuickEncryptLength);
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}
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/// <summary>
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/// 将 bytes 使用 code 做异或运算。
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/// </summary>
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/// <param name="bytes">原始二进制流。</param>
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/// <param name="code">异或二进制流。</param>
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/// <returns>异或后的二进制流。</returns>
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public static byte[] GetXorBytes(byte[] bytes, byte[] code)
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{
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return GetXorBytes(bytes, code, -1);
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}
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/// <summary>
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/// 将 bytes 使用 code 做异或运算。此方法将复用并改写传入的 bytes 作为返回值，而不额外分配内存空间。
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/// </summary>
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/// <param name="bytes">原始及异或后的二进制流。</param>
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/// <param name="code">异或二进制流。</param>
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public static void GetSelfXorBytes(byte[] bytes, byte[] code)
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{
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GetSelfXorBytes(bytes, code, -1);
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}
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/// <summary>
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/// 将 bytes 使用 code 做异或运算。
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/// </summary>
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/// <param name="bytes">原始二进制流。</param>
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/// <param name="code">异或二进制流。</param>
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/// <param name="length">异或计算长度，若小于 0，则计算整个二进制流。</param>
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/// <returns>异或后的二进制流。</returns>
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public static byte[] GetXorBytes(byte[] bytes, byte[] code, int length)
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{
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if (bytes == null)
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{
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return null;
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}
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int bytesLength = bytes.Length;
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byte[] results = new byte[bytesLength];
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Buffer.BlockCopy(bytes, 0, results, 0, bytesLength);
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GetSelfXorBytes(results, code, length);
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return results;
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}
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/// <summary>
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/// 将 bytes 使用 code 做异或运算。此方法将复用并改写传入的 bytes 作为返回值，而不额外分配内存空间。
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/// </summary>
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/// <param name="bytes">原始及异或后的二进制流。</param>
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/// <param name="code">异或二进制流。</param>
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/// <param name="length">异或计算长度，若小于 0，则计算整个二进制流。</param>
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public static void GetSelfXorBytes(byte[] bytes, byte[] code, int length)
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{
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if (bytes == null)
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{
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return;
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}
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if (code == null)
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{
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throw new System.Exception("Code is invalid.");
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}
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int codeLength = code.Length;
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if (codeLength <= 0)
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{
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throw new System.Exception("Code length is invalid.");
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}
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int bytesLength = bytes.Length;
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if (length < 0 || length > bytesLength)
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{
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length = bytesLength;
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}
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int codeIndex = 0;
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for (int i = 0; i < length; i++)
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{
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bytes[i] ^= code[codeIndex++];
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codeIndex %= codeLength;
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}
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}/// <summary>
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/// 加密字符串
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/// </summary>
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/// <param name="value"></param>
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/// <param name="key"></param>
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/// <returns></returns>
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/// <exception cref="Exception"></exception>
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public static string EncryptStr(string value, string key)
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{
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try
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{
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Byte[] keyArray = System.Text.Encoding.UTF8.GetBytes(key);
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Byte[] toEncryptArray = System.Text.Encoding.UTF8.GetBytes(value);
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RijndaelManaged rijndael = new System.Security.Cryptography.RijndaelManaged();
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rijndael.Key = keyArray;
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rijndael.Mode = System.Security.Cryptography.CipherMode.ECB;
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rijndael.Padding = System.Security.Cryptography.PaddingMode.PKCS7;
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System.Security.Cryptography.ICryptoTransform cTransform = rijndael.CreateEncryptor();
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Byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);
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return Convert.ToBase64String(resultArray, 0, resultArray.Length);
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}
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catch (Exception ex)
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{
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Log.Error(ex);
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return null;
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}
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}
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/// <summary>
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/// 解密字符串
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/// </summary>
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/// <param name="value"></param>
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/// <param name="key"></param>
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/// <returns></returns>
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/// <exception cref="Exception"></exception>
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public static string DecryptStr(string value, string key)
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{
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try
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{
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Byte[] keyArray = System.Text.Encoding.UTF8.GetBytes(key);
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Byte[] toEncryptArray = Convert.FromBase64String(value);
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RijndaelManaged rijndael = new System.Security.Cryptography.RijndaelManaged();
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rijndael.Key = keyArray;
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rijndael.Mode = System.Security.Cryptography.CipherMode.ECB;
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rijndael.Padding = System.Security.Cryptography.PaddingMode.PKCS7;
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System.Security.Cryptography.ICryptoTransform cTransform = rijndael.CreateDecryptor();
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Byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);
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return System.Text.Encoding.UTF8.GetString(resultArray);
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}
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catch (Exception ex)
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{
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Log.Error(ex);
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return null;
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}
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}
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/// <summary>
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/// AES 算法加密(ECB模式) 将明文加密
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/// </summary>
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/// <param name="toEncryptArray,">明文</param>
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/// <param name="Key">密钥</param>
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/// <returns>加密后base64编码的密文</returns>
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public static byte[] AesEncrypt(byte[] toEncryptArray, string Key)
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{
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try
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{
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byte[] keyArray = Encoding.UTF8.GetBytes(Key);
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RijndaelManaged rDel = new RijndaelManaged();
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rDel.Key = keyArray;
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rDel.Mode = CipherMode.ECB;
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rDel.Padding = PaddingMode.PKCS7;
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ICryptoTransform cTransform = rDel.CreateEncryptor();
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byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);
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return resultArray;
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}
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catch (Exception ex)
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{
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Log.Error(ex);
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return null;
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}
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}
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/// <summary>
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/// AES 算法解密(ECB模式) 将密文base64解码进行解密，返回明文
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/// </summary>
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/// <param name="toDecryptArray">密文</param>
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/// <param name="Key">密钥</param>
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/// <returns>明文</returns>
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public static byte[] AesDecrypt(byte[] toDecryptArray, string Key)
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{
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try
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{
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byte[] keyArray = Encoding.UTF8.GetBytes(Key);
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RijndaelManaged rDel = new RijndaelManaged();
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rDel.Key = keyArray;
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rDel.Mode = CipherMode.ECB;
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rDel.Padding = PaddingMode.PKCS7;
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ICryptoTransform cTransform = rDel.CreateDecryptor();
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byte[] resultArray = cTransform.TransformFinalBlock(toDecryptArray, 0, toDecryptArray.Length);
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return resultArray;
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}
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catch (Exception ex)
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{
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Log.Error(ex);
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return null;
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}
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}
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/// <summary>
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/// AES 算法加密(ECB模式) 将明文加密
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/// </summary>
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/// <param name="toEncryptArray,">明文</param>
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/// <param name="Key">密钥</param>
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/// <returns>加密后base64编码的密文</returns>
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public static byte[] AesCBCEncrypt(byte[] toEncryptArray, string Key,string KeyIV)
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{
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try
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{
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byte[] keyArray = Encoding.UTF8.GetBytes(Key);
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byte[] keyIVArray = Encoding.UTF8.GetBytes(KeyIV);
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RijndaelManaged rDel = new RijndaelManaged();
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rDel.Key = keyArray;
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rDel.IV = keyIVArray;
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rDel.Mode = CipherMode.CBC;
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rDel.Padding = PaddingMode.PKCS7;
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ICryptoTransform cTransform = rDel.CreateEncryptor();
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byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);
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return resultArray;
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}
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catch (Exception ex)
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{
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Log.Error(ex);
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return null;
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}
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}
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/// <summary>
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/// AES 算法解密(ECB模式) 将密文base64解码进行解密，返回明文
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/// </summary>
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/// <param name="toDecryptArray">密文</param>
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/// <param name="Key">密钥</param>
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/// <returns>明文</returns>
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public static byte[] AesCBCDecrypt(byte[] toDecryptArray, string Key,string KeyIV)
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{
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try
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{
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byte[] keyArray = Encoding.UTF8.GetBytes(Key);
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byte[] keyIVArray = Encoding.UTF8.GetBytes(KeyIV);
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RijndaelManaged rDel = new RijndaelManaged();
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rDel.Key = keyArray;
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rDel.IV = keyIVArray;
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rDel.Mode = CipherMode.CBC;
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rDel.Padding = PaddingMode.PKCS7;
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ICryptoTransform cTransform = rDel.CreateDecryptor();
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byte[] resultArray = cTransform.TransformFinalBlock(toDecryptArray, 0, toDecryptArray.Length);
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return resultArray;
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}
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catch (Exception ex)
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{
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Log.Error(ex);
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return null;
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}
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}
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}
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}
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}
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