244 lines
8.3 KiB
C#
244 lines
8.3 KiB
C#
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using Microsoft.AspNetCore.Mvc;
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using Microsoft.Extensions.Configuration;
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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Security.Cryptography;
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using System.Text;
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using System.Threading.Tasks;
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namespace Backend.Models
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{
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/// <summary>
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/// Encryption Decryption Function - 加解密
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/// </summary>
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public class EDFunction
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{
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const string SHA256_KEY = "DOMETAIPEI"; //自訂金鑰
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const string DES_KEY = "TAIPEIDO"; //DES_KEY金鑰(8位字元)
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const string DES_IV = "TAIPEIDO"; //DES_IV初始化向量字串(8位字元)
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const string AES_KEY = "TAIPEIDO"; //AES_KEY金鑰
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const string AES_IV = "TAIPEIDO"; //AES_IV初始化向量字串
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/// <summary>
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/// 單向加密SHA256
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/// </summary>
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/// <param name="text">加密字串</param>
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/// <returns></returns>
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public string GetSHA256Encryption(string text)
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{
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string signRet = string.Empty;
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byte[] key_byte = Encoding.Default.GetBytes(SHA256_KEY);
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using (HMACSHA256 mac = new HMACSHA256(key_byte))
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{
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byte[] source = Encoding.Default.GetBytes(text);//將字串轉為Byte[]
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byte[] crypto = mac.ComputeHash(source);//進行SHA256加密
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signRet = Convert.ToBase64String(crypto);//把加密後的字串從Byte[]轉為字串
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}
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return signRet;
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}
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/// <summary>
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/// DES加密
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/// </summary>
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/// <param name="text">待加密資料</param>
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/// <returns></returns>
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public string DESEncrypt(string text)
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{
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try
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{
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byte[] byKey = Encoding.ASCII.GetBytes(DES_KEY); //密鑰
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byte[] byIV = Encoding.ASCII.GetBytes(DES_IV); //IV值
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byte[] data = Encoding.Unicode.GetBytes(text);
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DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider();//加密、解密對象
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MemoryStream MStream = new MemoryStream();//內存流對象
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//用內存流實例化加密流對象
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CryptoStream CStream = new CryptoStream(MStream, cryptoProvider.CreateEncryptor(byKey, byIV), CryptoStreamMode.Write);
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CStream.Write(data, 0, data.Length);//向加密流中寫入數據
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CStream.FlushFinalBlock();//將數據壓入基礎流
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byte[] temp = MStream.ToArray();//從內存流中獲取字節序列
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CStream.Close();//關閉加密流
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MStream.Close();//關閉內存流
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return Convert.ToBase64String(temp);//返回加密後的字符串
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}
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catch
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{
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return text;
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}
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}
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/// <summary>
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/// DES解密
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/// </summary>
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/// <param name="text">待解密字符串</param>
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/// <returns></returns>
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public string DESDecrypt(string text)
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{
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try
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{
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byte[] byKey = Encoding.ASCII.GetBytes(DES_KEY); //DES密鑰
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byte[] byIV = Encoding.ASCII.GetBytes(DES_IV); //IV值
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byte[] data = Convert.FromBase64String(text);
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DESCryptoServiceProvider descsp = new DESCryptoServiceProvider();
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MemoryStream MStream = new MemoryStream();
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//用內存流實例化解密流對象
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CryptoStream CStream = new CryptoStream(MStream, descsp.CreateDecryptor(byKey, byIV), CryptoStreamMode.Write);
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CStream.Write(data, 0, data.Length);//向加密流中寫入數據
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CStream.FlushFinalBlock();//將數據壓入基礎流
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byte[] temp = MStream.ToArray();//從內存流中獲取字節序列
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CStream.Close();//關閉加密流
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MStream.Close();//關閉內存流
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return Encoding.Unicode.GetString(temp);//返回解密後的字符串
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}
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catch
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{
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return text;
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}
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}
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/// <summary>
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/// AES加密
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/// </summary>
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/// <param name="text"></param>
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/// <returns></returns>
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public string AESEncrypt(string text)
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{
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var encrypt = "";
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try
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{
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AesCryptoServiceProvider aes = new AesCryptoServiceProvider();
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MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();
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SHA256CryptoServiceProvider sha256 = new SHA256CryptoServiceProvider();
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byte[] keyData = sha256.ComputeHash(Encoding.UTF8.GetBytes(AES_KEY));
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byte[] ivData = md5.ComputeHash(Encoding.UTF8.GetBytes(AES_IV));
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byte[] dataByteArray = Encoding.UTF8.GetBytes(text);
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using (MemoryStream ms = new MemoryStream())
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{
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using (
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CryptoStream cs = new CryptoStream(ms, aes.CreateEncryptor(keyData, ivData), CryptoStreamMode.Write)
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)
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{
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cs.Write(dataByteArray, 0, dataByteArray.Length);
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cs.FlushFinalBlock();
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encrypt = Convert.ToBase64String(ms.ToArray());
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}
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}
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return encrypt;
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}
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catch
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{
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return text;
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}
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}
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/// <summary>
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/// AES解密
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/// </summary>
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/// <param name="text"></param>
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/// <returns></returns>
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public string AESDecrypt(string text)
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{
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var decrypt = "";
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try
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{
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SymmetricAlgorithm aes = new AesCryptoServiceProvider();
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MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();
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SHA256CryptoServiceProvider sha256 = new SHA256CryptoServiceProvider();
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byte[] keyData = sha256.ComputeHash(Encoding.UTF8.GetBytes(AES_KEY));
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byte[] ivData = md5.ComputeHash(Encoding.UTF8.GetBytes(AES_IV));
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byte[] dataByteArray = Convert.FromBase64String(text);
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using (MemoryStream ms = new MemoryStream())
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{
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using (
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CryptoStream cs = new CryptoStream(ms, aes.CreateDecryptor(keyData, ivData), CryptoStreamMode.Write)
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)
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{
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cs.Write(dataByteArray, 0, dataByteArray.Length);
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cs.FlushFinalBlock();
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decrypt = Encoding.UTF8.GetString(ms.ToArray());
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}
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}
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return decrypt;
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}
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catch
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{
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return text;
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}
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}
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}
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/// <summary>
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/// 回傳結果
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/// </summary>
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/// <typeparam name="T">資料型別</typeparam>
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public class ApiResult<T>
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{
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public string Code { get; set; }
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public string Msg { get; set; }
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public T Data { get; set; }
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}
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/// <summary>
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/// 資料夾
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/// </summary>
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public class FolderFunction
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{
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/// <summary>
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/// 創建資料夾
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/// </summary>
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/// <param name="folderPath"></param>
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/// <param name="tempType">0:找到資料夾也不刪除 1:找到資料夾並且刪除</param>
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public void CreateFolder(string folderPath, int type)
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{
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DirectoryInfo dInfo = new DirectoryInfo(folderPath);
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if (dInfo.Exists) //找到
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{
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if (type == 1)
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{
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dInfo.Delete(true); //如果資料夾裡面有檔案給bool參數就可以直接刪除，沒給bool參數會報錯誤
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}
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dInfo.Create();
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}
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else //沒找到
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{
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dInfo.Create(); //建立新的資料夾
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}
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}
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/// <summary>
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/// 刪除檔案
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/// </summary>
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/// <param name="filePath"></param>
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public void DeleteFile(string filePath)
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{
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System.IO.FileInfo file = new System.IO.FileInfo(filePath);
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if (File.Exists(filePath)) //找到
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{
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//do something
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file.Delete();
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}
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else //沒找到
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{
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//do something
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}
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}
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}
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}
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