133 lines
4.4 KiB
C#
133 lines
4.4 KiB
C#
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.Web;
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using System.Web.Security;
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/// <summary>
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/// 加密相關
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/// </summary>
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///
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namespace MyWeb
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{
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public class encrypt
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{
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public string MD5(string str, int bits = 32) //MD5加密
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{
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if (bits == 16)
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{
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return FormsAuthentication.HashPasswordForStoringInConfigFile(str, "MD5").ToLower().Substring(8, 16);
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}
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else
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{
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return FormsAuthentication.HashPasswordForStoringInConfigFile(str, "MD5").ToLower();
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}
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}
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public string SHA1(string SourceStr) //SHA1加密
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{
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return FormsAuthentication.HashPasswordForStoringInConfigFile(SourceStr, "SHA1");
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}
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private byte[] Keys = { 0xEF, 0xAB, 0x56, 0x78, 0x90, 0x34, 0xCD, 0x12 };
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public string EncryptDes(string SourceStr, string skey) //使用標準DES對稱加密, skey請帶入8位數自訂KEY
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{
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try
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{
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byte[] rgbKey = Encoding.UTF8.GetBytes(skey.Substring(0, 8));
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byte[] rgbIV = Keys;
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byte[] inputByteArray = Encoding.UTF8.GetBytes(SourceStr);
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DESCryptoServiceProvider dCSP = new DESCryptoServiceProvider();
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MemoryStream mStream = new MemoryStream();
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CryptoStream cStream = new CryptoStream(mStream, dCSP.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
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cStream.Write(inputByteArray, 0, inputByteArray.Length);
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cStream.FlushFinalBlock();
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string str = Convert.ToBase64String(mStream.ToArray());
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return str;
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}
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catch
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{
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return SourceStr;
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}
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}
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public string DecryptDes(string SourceStr, string skey) //使用標準DES對稱解密, skey請帶入8位數自訂KEY
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{
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try
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{
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byte[] rgbKey = Encoding.UTF8.GetBytes(skey.Substring(0, 8));
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byte[] rgbIV = Keys;
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byte[] inputByteArray = Convert.FromBase64String(SourceStr);
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DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider();
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MemoryStream mStream = new MemoryStream();
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CryptoStream cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
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cStream.Write(inputByteArray, 0, inputByteArray.Length);
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cStream.FlushFinalBlock();
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return Encoding.UTF8.GetString(mStream.ToArray());
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}
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catch
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{
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return SourceStr;
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}
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}
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public string EncryptAutoKey(string str)
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{
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function f = new function();
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if (!f.isStrNull(str))
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{
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string key = f.randKey(8);
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string encode = EncryptDes(str, key);
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str = f.randKey(3) + f.Left(key, 5) + f.Left(encode, encode.Length - 2) + f.Right(key, 3) + f.Right(encode, 2);
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return str;
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}
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return "";
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}
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public string DecryptAutoKey(string str)
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{
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try
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{
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function f = new function();
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if (!string.IsNullOrEmpty(str))
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{
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string str2 = str?.Substring(3, (str ?? "").Length - 3);
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string key = f.Left(str2, 5) + f.Left(f.Right(str2, 5), 3);
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str2 = str2.Substring(5, str2.Length - 10) + f.Right(str2, 2);
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return DecryptDes(str2, key);
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}
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}
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catch (Exception ex)
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{
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}
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return str;
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}
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public string SHA256(string str)
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{
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using (SHA256 hash = SHA256Managed.Create())
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{
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return string.Concat(hash
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.ComputeHash(Encoding.UTF8.GetBytes(str))
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.Select(item => item.ToString("x2")));
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}
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}
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public string followerHash(string s1, string s2)
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{
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string input = s1 + s2;
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input = new string(input.Where(c =>
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char.IsLetterOrDigit(c)).ToArray()).ToUpper();
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return SHA256(input);
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}
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}
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}
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