mirror of
https://github.com/ldqk/Masuit.Tools.git
synced 2026-10-25 18:30:29 +08:00
1490 lines
56 KiB
C#
1490 lines
56 KiB
C#
using System;
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using System.Collections;
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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.Text.RegularExpressions;
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namespace Masuit.Tools.Security
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{
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/// <summary>
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/// 常用的加密解密算法
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/// </summary>
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public static class Encrypt
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{
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#region DES对称加密解密
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/// <summary>
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/// 加密密钥，默认取“masuit”的MD5值
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/// </summary>
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public static string DefaultEncryptKey = "masuit".MDString2();
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/// <summary>
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/// 使用默认加密
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/// </summary>
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/// <param name="strText">被加密的字符串</param>
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/// <returns>加密后的数据</returns>
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public static string DesEncrypt(this string strText)
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{
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try
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{
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return DesEncrypt(strText, DefaultEncryptKey);
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}
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catch
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{
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return "";
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}
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}
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/// <summary>
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/// 使用默认解密
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/// </summary>
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/// <param name="strText">需要解密的 字符串</param>
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/// <returns>解密后的数据</returns>
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public static string DesDecrypt(this string strText)
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{
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try
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{
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return DesDecrypt(strText, DefaultEncryptKey);
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}
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catch
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{
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return "";
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}
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}
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/// <summary>
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/// 加密字符串
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/// 加密密钥必须为8位
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/// </summary>
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/// <param name="strText">被加密的字符串</param>
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/// <param name="strEncrKey">8位长度密钥</param>
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/// <returns>加密后的数据</returns>
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public static string DesEncrypt(this string strText, string strEncrKey)
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{
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if (strEncrKey.Length < 8)
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{
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throw new Exception("密钥长度无效，密钥必须是8位！");
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}
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StringBuilder ret = new StringBuilder();
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using var des = new DESCryptoServiceProvider();
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byte[] inputByteArray = Encoding.Default.GetBytes(strText);
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des.Key = Encoding.ASCII.GetBytes(strEncrKey.Substring(0, 8));
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des.IV = Encoding.ASCII.GetBytes(strEncrKey.Substring(0, 8));
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MemoryStream ms = new MemoryStream();
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using var cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write);
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cs.Write(inputByteArray, 0, inputByteArray.Length);
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cs.FlushFinalBlock();
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foreach (byte b in ms.ToArray())
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{
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ret.AppendFormat($"{b:X2}");
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}
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return ret.ToString();
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}
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/// <summary>
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/// DES加密文件
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/// </summary>
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/// <param name="fin">文件输入流</param>
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/// <param name="outFilePath">文件输出路径</param>
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/// <param name="strEncrKey">加密密钥</param>
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public static void DesEncrypt(this FileStream fin, string outFilePath, string strEncrKey)
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{
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byte[] iv =
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{
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0x12,
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0x34,
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0x56,
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0x78,
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0x90,
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0xAB,
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0xCD,
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0xEF
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};
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var byKey = Encoding.UTF8.GetBytes(strEncrKey.Substring(0, 8));
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using var fout = new FileStream(outFilePath, FileMode.OpenOrCreate, FileAccess.Write);
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fout.SetLength(0);
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byte[] bin = new byte[100];
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long rdlen = 0;
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long totlen = fin.Length;
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DES des = new DESCryptoServiceProvider();
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var encStream = new CryptoStream(fout, des.CreateEncryptor(byKey, iv), CryptoStreamMode.Write);
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while (rdlen < totlen)
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{
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var len = fin.Read(bin, 0, 100);
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encStream.Write(bin, 0, len);
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rdlen += len;
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}
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}
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/// <summary>
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/// DES解密文件
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/// </summary>
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/// <param name="fin">输入文件流</param>
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/// <param name="outFilePath">文件输出路径</param>
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/// <param name="sDecrKey">解密密钥</param>
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public static void DesDecrypt(this FileStream fin, string outFilePath, string sDecrKey)
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{
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byte[] iv =
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{
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0x12,
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0x34,
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0x56,
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0x78,
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0x90,
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0xAB,
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0xCD,
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0xEF
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};
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var byKey = Encoding.UTF8.GetBytes(sDecrKey.Substring(0, 8));
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using var fout = new FileStream(outFilePath, FileMode.OpenOrCreate, FileAccess.Write);
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fout.SetLength(0);
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byte[] bin = new byte[100];
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long rdlen = 0;
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long totlen = fin.Length;
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using DES des = new DESCryptoServiceProvider();
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var encStream = new CryptoStream(fout, des.CreateDecryptor(byKey, iv), CryptoStreamMode.Write);
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while (rdlen < totlen)
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{
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var len = fin.Read(bin, 0, 100);
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encStream.Write(bin, 0, len);
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rdlen += len;
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}
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}
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/// <summary>
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/// DES解密算法
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/// 密钥为8位
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/// </summary>
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/// <param name="pToDecrypt">需要解密的字符串</param>
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/// <param name="sKey">密钥</param>
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/// <returns>解密后的数据</returns>
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public static string DesDecrypt(this string pToDecrypt, string sKey)
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{
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if (sKey.Length < 8)
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{
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throw new Exception("密钥长度无效，密钥必须是8位！");
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}
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var ms = new MemoryStream();
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using var des = new DESCryptoServiceProvider();
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var inputByteArray = new byte[pToDecrypt.Length / 2];
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for (int x = 0; x < pToDecrypt.Length / 2; x++)
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{
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int i = Convert.ToInt32(pToDecrypt.Substring(x * 2, 2), 16);
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inputByteArray[x] = (byte)i;
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}
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des.Key = Encoding.ASCII.GetBytes(sKey.Substring(0, 8));
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des.IV = Encoding.ASCII.GetBytes(sKey.Substring(0, 8));
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using var cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
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cs.Write(inputByteArray, 0, inputByteArray.Length);
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cs.FlushFinalBlock();
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return Encoding.Default.GetString(ms.ToArray());
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}
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#endregion
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#region 对称加密算法AES RijndaelManaged加密解密
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private static readonly string Default_AES_Key = "@#kim123";
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private static byte[] Keys =
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{
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0x41,
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0x72,
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0x65,
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0x79,
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0x6F,
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0x75,
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0x6D,
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0x79,
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0x53,
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0x6E,
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0x6F,
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0x77,
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0x6D,
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0x61,
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0x6E,
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0x3F
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};
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/// <summary>
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/// 对称加密算法AES RijndaelManaged加密(RijndaelManaged（AES）算法是块式加密算法)
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/// </summary>
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/// <param name="encryptString">待加密字符串</param>
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/// <returns>加密结果字符串</returns>
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public static string AESEncrypt(this string encryptString)
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{
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return AESEncrypt(encryptString, Default_AES_Key);
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}
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/// <summary>
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/// 对称加密算法AES RijndaelManaged加密(RijndaelManaged（AES）算法是块式加密算法)
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/// </summary>
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/// <param name="encryptString">待加密字符串</param>
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/// <param name="encryptKey">加密密钥，须半角字符</param>
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/// <returns>加密结果字符串</returns>
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public static string AESEncrypt(this string encryptString, string encryptKey)
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{
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encryptKey = GetSubString(encryptKey, 32, "");
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encryptKey = encryptKey.PadRight(32, ' ');
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using var rijndaelProvider = new RijndaelManaged
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{
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Key = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 32)),
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IV = Keys
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};
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using ICryptoTransform rijndaelEncrypt = rijndaelProvider.CreateEncryptor();
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byte[] inputData = Encoding.UTF8.GetBytes(encryptString);
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byte[] encryptedData = rijndaelEncrypt.TransformFinalBlock(inputData, 0, inputData.Length);
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return Convert.ToBase64String(encryptedData);
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}
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/// <summary>
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/// 对称加密算法AES RijndaelManaged解密字符串
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/// </summary>
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/// <param name="decryptString">待解密的字符串</param>
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/// <returns>解密成功返回解密后的字符串,失败返源串</returns>
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public static string AESDecrypt(this string decryptString)
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{
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return AESDecrypt(decryptString, Default_AES_Key);
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}
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/// <summary>
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/// 对称加密算法AES RijndaelManaged解密字符串
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/// </summary>
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/// <param name="decryptString">待解密的字符串</param>
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/// <param name="decryptKey">解密密钥,和加密密钥相同</param>
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/// <returns>解密成功返回解密后的字符串,失败返回空</returns>
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public static string AESDecrypt(this string decryptString, string decryptKey)
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{
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try
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{
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decryptKey = GetSubString(decryptKey, 32, "");
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decryptKey = decryptKey.PadRight(32, ' ');
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using var rijndaelProvider = new RijndaelManaged()
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{
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Key = Encoding.UTF8.GetBytes(decryptKey),
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IV = Keys
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};
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using ICryptoTransform rijndaelDecrypt = rijndaelProvider.CreateDecryptor();
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byte[] inputData = Convert.FromBase64String(decryptString);
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byte[] decryptedData = rijndaelDecrypt.TransformFinalBlock(inputData, 0, inputData.Length);
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return Encoding.UTF8.GetString(decryptedData);
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}
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catch
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{
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return string.Empty;
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}
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}
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/// <summary>
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/// 按字节长度(按字节,一个汉字为2个字节)取得某字符串的一部分
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/// </summary>
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/// <param name="sourceString">源字符串</param>
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/// <param name="length">所取字符串字节长度</param>
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/// <param name="tailString">附加字符串(当字符串不够长时，尾部所添加的字符串，一般为"...")</param>
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/// <returns>某字符串的一部分</returns>
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private static string GetSubString(this string sourceString, int length, string tailString)
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{
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return GetSubString(sourceString, 0, length, tailString);
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}
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/// <summary>
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/// 按字节长度(按字节,一个汉字为2个字节)取得某字符串的一部分
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/// </summary>
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/// <param name="sourceString">源字符串</param>
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/// <param name="startIndex">索引位置，以0开始</param>
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/// <param name="length">所取字符串字节长度</param>
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/// <param name="tailString">附加字符串(当字符串不够长时，尾部所添加的字符串，一般为"...")</param>
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/// <returns>某字符串的一部分</returns>
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private static string GetSubString(this string sourceString, int startIndex, int length, string tailString)
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{
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//当是日文或韩文时(注:中文的范围:\u4e00 - \u9fa5, 日文在\u0800 - \u4e00, 韩文为\xAC00-\xD7A3)
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if (Regex.IsMatch(sourceString, "[\u0800-\u4e00]+") || Regex.IsMatch(sourceString, "[\xAC00-\xD7A3]+"))
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{
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//当截取的起始位置超出字段串长度时
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if (startIndex >= sourceString.Length)
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{
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return string.Empty;
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}
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return sourceString.Substring(startIndex, length + startIndex > sourceString.Length ? (sourceString.Length - startIndex) : length);
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}
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//中文字符，如"中国人民abcd123"
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if (length <= 0)
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{
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return string.Empty;
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}
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byte[] bytesSource = Encoding.Default.GetBytes(sourceString);
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//当字符串长度大于起始位置
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if (bytesSource.Length > startIndex)
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{
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int endIndex = bytesSource.Length;
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//当要截取的长度在字符串的有效长度范围内
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if (bytesSource.Length > (startIndex + length))
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{
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endIndex = length + startIndex;
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}
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else
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{
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//当不在有效范围内时,只取到字符串的结尾
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length = bytesSource.Length - startIndex;
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tailString = "";
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}
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var anResultFlag = new int[length];
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int nFlag = 0;
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//字节大于127为双字节字符
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for (int i = startIndex; i < endIndex; i++)
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{
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if (bytesSource[i] > 127)
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{
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nFlag++;
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if (nFlag == 3)
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{
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nFlag = 1;
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}
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}
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else
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{
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nFlag = 0;
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}
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anResultFlag[i] = nFlag;
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}
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//最后一个字节为双字节字符的一半
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if ((bytesSource[endIndex - 1] > 127) && (anResultFlag[length - 1] == 1))
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{
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length++;
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}
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byte[] bsResult = new byte[length];
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Array.Copy(bytesSource, startIndex, bsResult, 0, length);
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var myResult = Encoding.Default.GetString(bsResult);
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myResult += tailString;
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return myResult;
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}
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return string.Empty;
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}
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/// <summary>
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/// 加密文件流
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/// </summary>
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/// <param name="fs">需要加密的文件流</param>
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/// <param name="decryptKey">加密密钥</param>
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/// <returns>加密流</returns>
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public static CryptoStream AESEncryptStrream(this FileStream fs, string decryptKey)
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{
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decryptKey = GetSubString(decryptKey, 32, "");
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decryptKey = decryptKey.PadRight(32, ' ');
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using var rijndaelProvider = new RijndaelManaged()
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{
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Key = Encoding.UTF8.GetBytes(decryptKey),
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IV = Keys
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};
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using var encrypto = rijndaelProvider.CreateEncryptor();
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return new CryptoStream(fs, encrypto, CryptoStreamMode.Write);
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}
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/// <summary>
|
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/// 解密文件流
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/// </summary>
|
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/// <param name="fs">需要解密的文件流</param>
|
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/// <param name="decryptKey">解密密钥</param>
|
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/// <returns>加密流</returns>
|
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public static CryptoStream AESDecryptStream(this FileStream fs, string decryptKey)
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{
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decryptKey = GetSubString(decryptKey, 32, "");
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decryptKey = decryptKey.PadRight(32, ' ');
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using var rijndaelProvider = new RijndaelManaged()
|
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{
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Key = Encoding.UTF8.GetBytes(decryptKey),
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IV = Keys
|
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};
|
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using var decrypto = rijndaelProvider.CreateDecryptor();
|
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return new CryptoStream(fs, decrypto, CryptoStreamMode.Read);
|
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}
|
||
|
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/// <summary>
|
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/// 对指定文件AES加密
|
||
/// </summary>
|
||
/// <param name="input">源文件流</param>
|
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/// <param name="outputPath">输出文件路径</param>
|
||
public static void AESEncryptFile(this FileStream input, string outputPath)
|
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{
|
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using var fren = new FileStream(outputPath, FileMode.Create);
|
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using var enfr = AESEncryptStrream(fren, Default_AES_Key);
|
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byte[] bytearrayinput = new byte[input.Length];
|
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input.Read(bytearrayinput, 0, bytearrayinput.Length);
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enfr.Write(bytearrayinput, 0, bytearrayinput.Length);
|
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}
|
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|
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/// <summary>
|
||
/// 对指定的文件AES解密
|
||
/// </summary>
|
||
/// <param name="input">源文件流</param>
|
||
/// <param name="outputPath">输出文件路径</param>
|
||
public static void AESDecryptFile(this FileStream input, string outputPath)
|
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{
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using FileStream frde = new FileStream(outputPath, FileMode.Create);
|
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using CryptoStream defr = AESDecryptStream(input, Default_AES_Key);
|
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byte[] bytearrayoutput = new byte[1024];
|
||
while (true)
|
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{
|
||
var count = defr.Read(bytearrayoutput, 0, bytearrayoutput.Length);
|
||
frde.Write(bytearrayoutput, 0, count);
|
||
if (count < bytearrayoutput.Length)
|
||
{
|
||
break;
|
||
}
|
||
}
|
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}
|
||
|
||
#endregion
|
||
|
||
#region Base64加密解密
|
||
|
||
/// <summary>
|
||
/// Base64加密
|
||
/// </summary>
|
||
/// <param name="str">需要加密的字符串</param>
|
||
/// <returns>加密后的数据</returns>
|
||
public static string Base64Encrypt(this string str)
|
||
{
|
||
byte[] encbuff = Encoding.UTF8.GetBytes(str);
|
||
return Convert.ToBase64String(encbuff);
|
||
}
|
||
|
||
/// <summary>
|
||
/// Base64解密
|
||
/// </summary>
|
||
/// <param name="str">需要解密的字符串</param>
|
||
/// <returns>解密后的数据</returns>
|
||
public static string Base64Decrypt(this string str)
|
||
{
|
||
byte[] decbuff = Convert.FromBase64String(str);
|
||
return Encoding.UTF8.GetString(decbuff);
|
||
}
|
||
|
||
#endregion
|
||
|
||
#region MD5加密
|
||
|
||
/// <summary>
|
||
/// MD5加密
|
||
/// </summary>
|
||
/// <param name="strText">原数据</param>
|
||
/// <returns>MD5字符串</returns>
|
||
public static string MD5Encrypt(this string strText)
|
||
{
|
||
using MD5 md5 = new MD5CryptoServiceProvider();
|
||
byte[] result = md5.ComputeHash(Encoding.Default.GetBytes(strText));
|
||
return Encoding.Default.GetString(result);
|
||
}
|
||
|
||
#endregion
|
||
|
||
/// <summary>
|
||
/// SHA256函数
|
||
/// </summary>
|
||
/// <param name="str">原始字符串</param>
|
||
/// <returns>SHA256结果(返回长度为44字节的字符串)</returns>
|
||
public static string SHA256(this string str)
|
||
{
|
||
byte[] sha256Data = Encoding.UTF8.GetBytes(str);
|
||
using var sha256 = new SHA256Managed();
|
||
byte[] result = sha256.ComputeHash(sha256Data);
|
||
return Convert.ToBase64String(result); //返回长度为44字节的字符串
|
||
}
|
||
|
||
#region 创建Key
|
||
|
||
/// <summary>
|
||
/// 创建Key
|
||
/// </summary>
|
||
/// <returns>密钥</returns>
|
||
public static string GenerateKey()
|
||
{
|
||
using var desCrypto = (DESCryptoServiceProvider)DES.Create();
|
||
return Encoding.ASCII.GetString(desCrypto.Key);
|
||
}
|
||
|
||
#endregion
|
||
|
||
#region MD5加密
|
||
|
||
/// <summary>
|
||
/// MD5加密
|
||
/// </summary>
|
||
/// <param name="pToEncrypt">加密字符串</param>
|
||
/// <param name="sKey">密钥Key</param>
|
||
/// <returns>加密后的字符串</returns>
|
||
public static string MD5Encrypt(this string pToEncrypt, string sKey)
|
||
{
|
||
using var des = new DESCryptoServiceProvider();
|
||
var inputByteArray = Encoding.Default.GetBytes(pToEncrypt);
|
||
des.Key = Encoding.ASCII.GetBytes(sKey);
|
||
des.IV = Encoding.ASCII.GetBytes(sKey);
|
||
var ms = new MemoryStream();
|
||
using var cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write);
|
||
cs.Write(inputByteArray, 0, inputByteArray.Length);
|
||
cs.FlushFinalBlock();
|
||
var ret = new StringBuilder();
|
||
foreach (var b in ms.ToArray())
|
||
{
|
||
ret.AppendFormat("{0:X2}", b);
|
||
}
|
||
|
||
return ret.ToString();
|
||
}
|
||
|
||
#endregion
|
||
|
||
#region MD5解密
|
||
|
||
/// <summary>
|
||
/// MD5解密
|
||
/// </summary>
|
||
/// <param name="pToDecrypt">解密字符串</param>
|
||
/// <param name="sKey">密钥Key</param>
|
||
/// <returns>解密后的数据</returns>
|
||
public static string MD5Decrypt(this string pToDecrypt, string sKey)
|
||
{
|
||
using var des = new DESCryptoServiceProvider();
|
||
var inputByteArray = new byte[pToDecrypt.Length / 2];
|
||
for (var x = 0; x < pToDecrypt.Length / 2; x++)
|
||
{
|
||
var i = Convert.ToInt32(pToDecrypt.Substring(x * 2, 2), 16);
|
||
inputByteArray[x] = (byte)i;
|
||
}
|
||
|
||
des.Key = Encoding.ASCII.GetBytes(sKey);
|
||
des.IV = Encoding.ASCII.GetBytes(sKey);
|
||
var ms = new MemoryStream();
|
||
using var cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
|
||
cs.Write(inputByteArray, 0, inputByteArray.Length);
|
||
cs.FlushFinalBlock();
|
||
return Encoding.Default.GetString(ms.ToArray());
|
||
}
|
||
|
||
#endregion
|
||
|
||
#region MD5加密算法
|
||
|
||
private const int S11 = 7;
|
||
private const int S12 = 12;
|
||
private const int S13 = 17;
|
||
private const int S14 = 22;
|
||
private const int S21 = 5;
|
||
private const int S22 = 9;
|
||
private const int S23 = 14;
|
||
private const int S24 = 20;
|
||
private const int S31 = 4;
|
||
private const int S32 = 11;
|
||
private const int S33 = 16;
|
||
private const int S34 = 23;
|
||
private const int S41 = 6;
|
||
private const int S42 = 10;
|
||
private const int S43 = 15;
|
||
private const int S44 = 21;
|
||
|
||
private static uint A;
|
||
private static uint B;
|
||
private static uint C;
|
||
private static uint D;
|
||
|
||
private static uint F(uint x, uint y, uint z)
|
||
{
|
||
return (x & y) | (~x & z);
|
||
}
|
||
|
||
private static uint G(uint x, uint y, uint z)
|
||
{
|
||
return (x & z) | (y & ~z);
|
||
}
|
||
|
||
private static uint H(uint x, uint y, uint z)
|
||
{
|
||
return x ^ y ^ z;
|
||
}
|
||
|
||
private static uint I(uint x, uint y, uint z)
|
||
{
|
||
return y ^ (x | ~z);
|
||
}
|
||
|
||
private static void FF(ref uint a, uint b, uint c, uint d, uint mj, int s, uint ti)
|
||
{
|
||
a = a + F(b, c, d) + mj + ti;
|
||
a = (a << s) | (a >> (32 - s));
|
||
a += b;
|
||
}
|
||
|
||
private static void GG(ref uint a, uint b, uint c, uint d, uint mj, int s, uint ti)
|
||
{
|
||
a = a + G(b, c, d) + mj + ti;
|
||
a = (a << s) | (a >> (32 - s));
|
||
a += b;
|
||
}
|
||
|
||
private static void HH(ref uint a, uint b, uint c, uint d, uint mj, int s, uint ti)
|
||
{
|
||
a = a + H(b, c, d) + mj + ti;
|
||
a = (a << s) | (a >> (32 - s));
|
||
a += b;
|
||
}
|
||
|
||
private static void II(ref uint a, uint b, uint c, uint d, uint mj, int s, uint ti)
|
||
{
|
||
a = a + I(b, c, d) + mj + ti;
|
||
a = (a << s) | (a >> (32 - s));
|
||
a += b;
|
||
}
|
||
|
||
private static void MD5_Init()
|
||
{
|
||
A = 0x67452301; //in memory, this is 0x01234567
|
||
B = 0xefcdab89; //in memory, this is 0x89abcdef
|
||
C = 0x98badcfe; //in memory, this is 0xfedcba98
|
||
D = 0x10325476; //in memory, this is 0x76543210
|
||
}
|
||
|
||
private static uint[] MD5_Append(byte[] input)
|
||
{
|
||
int zeros;
|
||
var ones = 1;
|
||
int size;
|
||
var n = input.Length;
|
||
var m = n % 64;
|
||
if (m < 56)
|
||
{
|
||
zeros = 55 - m;
|
||
size = n - m + 64;
|
||
}
|
||
else if (m == 56)
|
||
{
|
||
zeros = 0;
|
||
ones = 0;
|
||
size = n + 8;
|
||
}
|
||
else
|
||
{
|
||
zeros = 63 - m + 56;
|
||
size = n + 64 - m + 64;
|
||
}
|
||
|
||
var bs = new ArrayList(input);
|
||
if (ones == 1)
|
||
bs.Add((byte)0x80); // 0x80 = $10000000
|
||
for (var i = 0; i < zeros; i++)
|
||
bs.Add((byte)0);
|
||
|
||
var N = (ulong)n * 8;
|
||
var h1 = (byte)(N & 0xFF);
|
||
var h2 = (byte)((N >> 8) & 0xFF);
|
||
var h3 = (byte)((N >> 16) & 0xFF);
|
||
var h4 = (byte)((N >> 24) & 0xFF);
|
||
var h5 = (byte)((N >> 32) & 0xFF);
|
||
var h6 = (byte)((N >> 40) & 0xFF);
|
||
var h7 = (byte)((N >> 48) & 0xFF);
|
||
var h8 = (byte)(N >> 56);
|
||
bs.Add(h1);
|
||
bs.Add(h2);
|
||
bs.Add(h3);
|
||
bs.Add(h4);
|
||
bs.Add(h5);
|
||
bs.Add(h6);
|
||
bs.Add(h7);
|
||
bs.Add(h8);
|
||
var ts = (byte[])bs.ToArray(typeof(byte));
|
||
|
||
/* Decodes input (byte[]) into output (UInt32[]). Assumes len is
|
||
* a multiple of 4.
|
||
*/
|
||
var output = new uint[size / 4];
|
||
for (long i = 0, j = 0; i < size; j++, i += 4)
|
||
output[j] = (uint)(ts[i] | (ts[i + 1] << 8) | (ts[i + 2] << 16) | (ts[i + 3] << 24));
|
||
return output;
|
||
}
|
||
|
||
private static uint[] MD5_Trasform(uint[] x)
|
||
{
|
||
for (var k = 0; k < x.Length; k += 16)
|
||
{
|
||
var a = A;
|
||
var b = B;
|
||
var c = C;
|
||
var d = D;
|
||
|
||
FF(ref a, b, c, d, x[k + 0], S11, 0xd76aa478); /* 1 */
|
||
FF(ref d, a, b, c, x[k + 1], S12, 0xe8c7b756); /* 2 */
|
||
FF(ref c, d, a, b, x[k + 2], S13, 0x242070db); /* 3 */
|
||
FF(ref b, c, d, a, x[k + 3], S14, 0xc1bdceee); /* 4 */
|
||
FF(ref a, b, c, d, x[k + 4], S11, 0xf57c0faf); /* 5 */
|
||
FF(ref d, a, b, c, x[k + 5], S12, 0x4787c62a); /* 6 */
|
||
FF(ref c, d, a, b, x[k + 6], S13, 0xa8304613); /* 7 */
|
||
FF(ref b, c, d, a, x[k + 7], S14, 0xfd469501); /* 8 */
|
||
FF(ref a, b, c, d, x[k + 8], S11, 0x698098d8); /* 9 */
|
||
FF(ref d, a, b, c, x[k + 9], S12, 0x8b44f7af); /* 10 */
|
||
FF(ref c, d, a, b, x[k + 10], S13, 0xffff5bb1); /* 11 */
|
||
FF(ref b, c, d, a, x[k + 11], S14, 0x895cd7be); /* 12 */
|
||
FF(ref a, b, c, d, x[k + 12], S11, 0x6b901122); /* 13 */
|
||
FF(ref d, a, b, c, x[k + 13], S12, 0xfd987193); /* 14 */
|
||
FF(ref c, d, a, b, x[k + 14], S13, 0xa679438e); /* 15 */
|
||
FF(ref b, c, d, a, x[k + 15], S14, 0x49b40821); /* 16 */
|
||
|
||
GG(ref a, b, c, d, x[k + 1], S21, 0xf61e2562); /* 17 */
|
||
GG(ref d, a, b, c, x[k + 6], S22, 0xc040b340); /* 18 */
|
||
GG(ref c, d, a, b, x[k + 11], S23, 0x265e5a51); /* 19 */
|
||
GG(ref b, c, d, a, x[k + 0], S24, 0xe9b6c7aa); /* 20 */
|
||
GG(ref a, b, c, d, x[k + 5], S21, 0xd62f105d); /* 21 */
|
||
GG(ref d, a, b, c, x[k + 10], S22, 0x2441453); /* 22 */
|
||
GG(ref c, d, a, b, x[k + 15], S23, 0xd8a1e681); /* 23 */
|
||
GG(ref b, c, d, a, x[k + 4], S24, 0xe7d3fbc8); /* 24 */
|
||
GG(ref a, b, c, d, x[k + 9], S21, 0x21e1cde6); /* 25 */
|
||
GG(ref d, a, b, c, x[k + 14], S22, 0xc33707d6); /* 26 */
|
||
GG(ref c, d, a, b, x[k + 3], S23, 0xf4d50d87); /* 27 */
|
||
GG(ref b, c, d, a, x[k + 8], S24, 0x455a14ed); /* 28 */
|
||
GG(ref a, b, c, d, x[k + 13], S21, 0xa9e3e905); /* 29 */
|
||
GG(ref d, a, b, c, x[k + 2], S22, 0xfcefa3f8); /* 30 */
|
||
GG(ref c, d, a, b, x[k + 7], S23, 0x676f02d9); /* 31 */
|
||
GG(ref b, c, d, a, x[k + 12], S24, 0x8d2a4c8a); /* 32 */
|
||
|
||
HH(ref a, b, c, d, x[k + 5], S31, 0xfffa3942); /* 33 */
|
||
HH(ref d, a, b, c, x[k + 8], S32, 0x8771f681); /* 34 */
|
||
HH(ref c, d, a, b, x[k + 11], S33, 0x6d9d6122); /* 35 */
|
||
HH(ref b, c, d, a, x[k + 14], S34, 0xfde5380c); /* 36 */
|
||
HH(ref a, b, c, d, x[k + 1], S31, 0xa4beea44); /* 37 */
|
||
HH(ref d, a, b, c, x[k + 4], S32, 0x4bdecfa9); /* 38 */
|
||
HH(ref c, d, a, b, x[k + 7], S33, 0xf6bb4b60); /* 39 */
|
||
HH(ref b, c, d, a, x[k + 10], S34, 0xbebfbc70); /* 40 */
|
||
HH(ref a, b, c, d, x[k + 13], S31, 0x289b7ec6); /* 41 */
|
||
HH(ref d, a, b, c, x[k + 0], S32, 0xeaa127fa); /* 42 */
|
||
HH(ref c, d, a, b, x[k + 3], S33, 0xd4ef3085); /* 43 */
|
||
HH(ref b, c, d, a, x[k + 6], S34, 0x4881d05); /* 44 */
|
||
HH(ref a, b, c, d, x[k + 9], S31, 0xd9d4d039); /* 45 */
|
||
HH(ref d, a, b, c, x[k + 12], S32, 0xe6db99e5); /* 46 */
|
||
HH(ref c, d, a, b, x[k + 15], S33, 0x1fa27cf8); /* 47 */
|
||
HH(ref b, c, d, a, x[k + 2], S34, 0xc4ac5665); /* 48 */
|
||
|
||
II(ref a, b, c, d, x[k + 0], S41, 0xf4292244); /* 49 */
|
||
II(ref d, a, b, c, x[k + 7], S42, 0x432aff97); /* 50 */
|
||
II(ref c, d, a, b, x[k + 14], S43, 0xab9423a7); /* 51 */
|
||
II(ref b, c, d, a, x[k + 5], S44, 0xfc93a039); /* 52 */
|
||
II(ref a, b, c, d, x[k + 12], S41, 0x655b59c3); /* 53 */
|
||
II(ref d, a, b, c, x[k + 3], S42, 0x8f0ccc92); /* 54 */
|
||
II(ref c, d, a, b, x[k + 10], S43, 0xffeff47d); /* 55 */
|
||
II(ref b, c, d, a, x[k + 1], S44, 0x85845dd1); /* 56 */
|
||
II(ref a, b, c, d, x[k + 8], S41, 0x6fa87e4f); /* 57 */
|
||
II(ref d, a, b, c, x[k + 15], S42, 0xfe2ce6e0); /* 58 */
|
||
II(ref c, d, a, b, x[k + 6], S43, 0xa3014314); /* 59 */
|
||
II(ref b, c, d, a, x[k + 13], S44, 0x4e0811a1); /* 60 */
|
||
II(ref a, b, c, d, x[k + 4], S41, 0xf7537e82); /* 61 */
|
||
II(ref d, a, b, c, x[k + 11], S42, 0xbd3af235); /* 62 */
|
||
II(ref c, d, a, b, x[k + 2], S43, 0x2ad7d2bb); /* 63 */
|
||
II(ref b, c, d, a, x[k + 9], S44, 0xeb86d391); /* 64 */
|
||
|
||
A += a;
|
||
B += b;
|
||
C += c;
|
||
D += d;
|
||
}
|
||
|
||
return new[]
|
||
{
|
||
A,
|
||
B,
|
||
C,
|
||
D
|
||
};
|
||
}
|
||
|
||
#region MD5对数组数据加密
|
||
|
||
/// <summary>
|
||
/// MD5对数组数据加密
|
||
/// </summary>
|
||
/// <param name="input">包含需要加密的数据的数组</param>
|
||
/// <returns>加密后的字节流</returns>
|
||
public static byte[] MD5Array(this byte[] input)
|
||
{
|
||
MD5_Init();
|
||
var block = MD5_Append(input);
|
||
var bits = MD5_Trasform(block);
|
||
var output = new byte[bits.Length * 4];
|
||
for (int i = 0, j = 0; i < bits.Length; i++, j += 4)
|
||
{
|
||
output[j] = (byte)(bits[i] & 0xff);
|
||
output[j + 1] = (byte)((bits[i] >> 8) & 0xff);
|
||
output[j + 2] = (byte)((bits[i] >> 16) & 0xff);
|
||
output[j + 3] = (byte)((bits[i] >> 24) & 0xff);
|
||
}
|
||
|
||
return output;
|
||
}
|
||
|
||
#endregion
|
||
|
||
#region 获取数组的Hex值
|
||
|
||
/// <summary>
|
||
/// 获取数组的Hex值
|
||
/// </summary>
|
||
/// <param name="array">需要求Hex值的数组</param>
|
||
/// <param name="uppercase">是否转大写</param>
|
||
/// <returns>字节数组的16进制表示</returns>
|
||
public static string ArrayToHexString(this byte[] array, bool uppercase)
|
||
{
|
||
var format = "x2";
|
||
if (uppercase)
|
||
{
|
||
format = "X2";
|
||
}
|
||
|
||
return array.Aggregate("", (current, b) => current + b.ToString(format));
|
||
}
|
||
|
||
#endregion
|
||
|
||
#region 对字符串进行MD5加密
|
||
|
||
/// <summary>
|
||
/// 对字符串进行MD5加密
|
||
/// </summary>
|
||
/// <param name="message">需要加密的字符串</param>
|
||
/// <returns>加密后的结果</returns>
|
||
public static string MDString(this string message)
|
||
{
|
||
var c = message.ToCharArray();
|
||
var b = new byte[c.Length];
|
||
for (var i = 0; i < c.Length; i++)
|
||
{
|
||
b[i] = (byte)c[i];
|
||
}
|
||
|
||
var digest = MD5Array(b);
|
||
return ArrayToHexString(digest, false);
|
||
}
|
||
|
||
/// <summary>
|
||
/// 对字符串进行MD5二次加密
|
||
/// </summary>
|
||
/// <param name="message">需要加密的字符串</param>
|
||
/// <returns>加密后的结果</returns>
|
||
public static string MDString2(this string message) => MDString(MDString(message));
|
||
|
||
/// <summary>
|
||
/// MD5 三次加密算法
|
||
/// </summary>
|
||
/// <param name="s">需要加密的字符串</param>
|
||
/// <returns>MD5字符串</returns>
|
||
public static string MDString3(this string s)
|
||
{
|
||
using MD5 md5 = MD5.Create();
|
||
byte[] bytes = Encoding.ASCII.GetBytes(s);
|
||
byte[] bytes1 = md5.ComputeHash(bytes);
|
||
byte[] bytes2 = md5.ComputeHash(bytes1);
|
||
byte[] bytes3 = md5.ComputeHash(bytes2);
|
||
StringBuilder sb = new StringBuilder();
|
||
foreach (var item in bytes3)
|
||
{
|
||
sb.Append(item.ToString("x").PadLeft(2, '0'));
|
||
}
|
||
|
||
return sb.ToString();
|
||
}
|
||
|
||
/// <summary>
|
||
/// 对字符串进行MD5加盐加密
|
||
/// </summary>
|
||
/// <param name="message">需要加密的字符串</param>
|
||
/// <param name="salt">盐</param>
|
||
/// <returns>加密后的结果</returns>
|
||
public static string MDString(this string message, string salt) => MDString(message + salt);
|
||
|
||
/// <summary>
|
||
/// 对字符串进行MD5二次加盐加密
|
||
/// </summary>
|
||
/// <param name="message">需要加密的字符串</param>
|
||
/// <param name="salt">盐</param>
|
||
/// <returns>加密后的结果</returns>
|
||
public static string MDString2(this string message, string salt) => MDString(MDString(message + salt), salt);
|
||
|
||
/// <summary>
|
||
/// MD5 三次加密算法
|
||
/// </summary>
|
||
/// <param name="s">需要加密的字符串</param>
|
||
/// <param name="salt">盐</param>
|
||
/// <returns>MD5字符串</returns>
|
||
public static string MDString3(this string s, string salt)
|
||
{
|
||
using MD5 md5 = MD5.Create();
|
||
byte[] bytes = Encoding.ASCII.GetBytes(s + salt);
|
||
byte[] bytes1 = md5.ComputeHash(bytes);
|
||
byte[] bytes2 = md5.ComputeHash(bytes1);
|
||
byte[] bytes3 = md5.ComputeHash(bytes2);
|
||
StringBuilder sb = new StringBuilder();
|
||
foreach (var item in bytes3)
|
||
{
|
||
sb.Append(item.ToString("x").PadLeft(2, '0'));
|
||
}
|
||
|
||
return sb.ToString();
|
||
}
|
||
|
||
#endregion
|
||
|
||
#region 获取文件的MD5值
|
||
|
||
/// <summary>
|
||
/// 获取文件的MD5值
|
||
/// </summary>
|
||
/// <param name="fileName">需要求MD5值的文件的文件名及路径</param>
|
||
/// <returns>MD5字符串</returns>
|
||
public static string MDFile(this string fileName)
|
||
{
|
||
using var fs = File.Open(fileName, FileMode.Open, FileAccess.Read);
|
||
var array = new byte[fs.Length];
|
||
fs.Read(array, 0, (int)fs.Length);
|
||
var digest = MD5Array(array);
|
||
return ArrayToHexString(digest, false);
|
||
}
|
||
|
||
#endregion
|
||
|
||
#region 测试MD5加密算法的函数
|
||
|
||
/// <summary>
|
||
/// 测试MD5加密算法的函数
|
||
/// </summary>
|
||
/// <param name="message">需要加密的字符串</param>
|
||
/// <returns>加密后的 数据</returns>
|
||
private static string MD5Test(this string message)
|
||
{
|
||
return "rnMD5 (" + "message" + ") = " + MDString(message);
|
||
}
|
||
|
||
#endregion
|
||
|
||
#region MD5加密算法测试用数据
|
||
|
||
/// <summary>
|
||
/// MD5加密算法测试用数据
|
||
/// </summary>
|
||
/// <returns> </returns>
|
||
private static string TestSuite()
|
||
{
|
||
var s = "";
|
||
s += MD5Test("");
|
||
s += MD5Test("a");
|
||
s += MD5Test("abc");
|
||
s += MD5Test("message digest");
|
||
s += MD5Test("abcdefghijklmnopqrstuvwxyz");
|
||
s += MD5Test("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789");
|
||
s += MD5Test("12345678901234567890123456789012345678901234567890123456789012345678901234567890");
|
||
return s;
|
||
}
|
||
|
||
#endregion
|
||
|
||
#endregion MD5加密算法
|
||
}
|
||
|
||
/// <summary>
|
||
/// RC2加密解密算法
|
||
/// </summary>
|
||
public static class RC2
|
||
{
|
||
private static ASCIIEncoding _asciiEncoding;
|
||
private static byte[] _iv;
|
||
private static byte[] _key;
|
||
private static RC2CryptoServiceProvider _rc2Csp;
|
||
private static UnicodeEncoding _textConverter;
|
||
|
||
static RC2()
|
||
{
|
||
InitializeComponent();
|
||
}
|
||
|
||
private static void InitializeComponent()
|
||
{
|
||
_key = new byte[]
|
||
{
|
||
106,
|
||
51,
|
||
25,
|
||
141,
|
||
157,
|
||
142,
|
||
23,
|
||
111,
|
||
234,
|
||
159,
|
||
187,
|
||
154,
|
||
215,
|
||
34,
|
||
37,
|
||
204
|
||
};
|
||
_iv = new byte[]
|
||
{
|
||
135,
|
||
186,
|
||
133,
|
||
136,
|
||
184,
|
||
149,
|
||
153,
|
||
144
|
||
};
|
||
_asciiEncoding = new ASCIIEncoding();
|
||
_textConverter = new UnicodeEncoding();
|
||
_rc2Csp = new RC2CryptoServiceProvider();
|
||
}
|
||
|
||
#region 将文本数据加密后写入一个文件
|
||
|
||
/// <summary>
|
||
/// 将文本数据加密后写入一个文件，其中，这个文件是用InitBinFile建立的，这个文件将被分成十块，
|
||
/// 用来分别保存10组不同的数据，第一个byte位保留，第2位到第21位分别用来存放每块数据的长度，但
|
||
/// 一个byte的取值为0-127，所以，用两个byte来存放一个长度。
|
||
/// </summary>
|
||
/// <param name="toEncryptText">要加密的文本数据</param>
|
||
/// <param name="filePath">要写入的文件</param>
|
||
/// <param name="dataIndex">写入第几块，取值为1--10</param>
|
||
/// <returns>是否操作成功</returns>
|
||
public static bool EncryptToFile(this string toEncryptText, string filePath, int dataIndex)
|
||
{
|
||
var r = false;
|
||
if ((dataIndex > 10) && (dataIndex < 1))
|
||
{
|
||
return r;
|
||
}
|
||
|
||
//打开要写入的文件，主要是为了保持原文件的内容不丢失
|
||
var tmpFileStream = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.None, 1024, true);
|
||
|
||
var index = new byte[10261];
|
||
//将读取的内容写到byte数组
|
||
tmpFileStream.Read(index, 0, 10261);
|
||
tmpFileStream.Close();
|
||
//定义基本的加密转换运算
|
||
using var Encryptor = _rc2Csp.CreateEncryptor(_key, _iv);
|
||
var msEncrypt = new MemoryStream();
|
||
//在此加密转换流中，加密将从csEncrypt，加密后，结果在msEncrypt流中。
|
||
using var csEncrypt = new CryptoStream(msEncrypt, Encryptor, CryptoStreamMode.Write);
|
||
//将要加密的文本转换成UTF-16 编码，保存在tmp数组。
|
||
var tmp = _textConverter.GetBytes(toEncryptText);
|
||
//将tmp输入csEncrypt,将通过Encryptor来加密。
|
||
csEncrypt.Write(tmp, 0, tmp.Length);
|
||
//输出到msEnctypt
|
||
csEncrypt.FlushFinalBlock();
|
||
//将流转成byte[]
|
||
var encrypted = msEncrypt.ToArray();
|
||
if (encrypted.Length > 1024)
|
||
return false;
|
||
//得到加密后数据的大小，将结果存在指定的位置。
|
||
index[dataIndex * 2 - 1] = Convert.ToByte(Convert.ToString(encrypted.Length / 128));
|
||
index[dataIndex * 2] = Convert.ToByte(Convert.ToString(encrypted.Length % 128));
|
||
//将加密后的结果写入index（覆盖）
|
||
for (var i = 0; i < encrypted.Length; i++)
|
||
index[1024 * (dataIndex - 1) + 21 + i] = encrypted[i];
|
||
//建立文件流
|
||
tmpFileStream = new FileStream(filePath, FileMode.Truncate, FileAccess.Write, FileShare.None, 1024, true);
|
||
//写文件
|
||
tmpFileStream.Write(index, 0, 10261);
|
||
tmpFileStream.Flush();
|
||
r = true;
|
||
tmpFileStream.Close();
|
||
return r;
|
||
}
|
||
|
||
#endregion
|
||
|
||
#region 从一个文件中解密出一段文本，其中，这个文件是由InitBinFile建立的，并且由 EncryptToFile加密的
|
||
|
||
/// <summary>
|
||
/// 从一个文件中解密出一段文本，其中，这个文件是由InitBinFile建立的，并且由 EncryptToFile加密的
|
||
/// </summary>
|
||
/// <param name="filePath">要解密的文件</param>
|
||
/// <param name="dataIndex">要从哪一个块中解密</param>
|
||
/// <returns>解密后的文本</returns>
|
||
public static string DecryptFromFile(this string filePath, int dataIndex)
|
||
{
|
||
if (dataIndex > 10 && dataIndex < 1)
|
||
{
|
||
return "";
|
||
}
|
||
|
||
using var tmpFileStream = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.None, 1024, true);
|
||
using var decryptor = _rc2Csp.CreateDecryptor(_key, _iv);
|
||
var msDecrypt = new MemoryStream();
|
||
using var csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Write);
|
||
var index = new byte[10261];
|
||
tmpFileStream.Read(index, 0, 10261);
|
||
var count = index[dataIndex * 2 - 1] * 128 + index[dataIndex * 2];
|
||
var tmp = new byte[count];
|
||
Array.Copy(index, 1024 * (dataIndex - 1) + 21, tmp, 0, count);
|
||
csDecrypt.Write(tmp, 0, count);
|
||
csDecrypt.FlushFinalBlock();
|
||
var decrypted = msDecrypt.ToArray();
|
||
return _textConverter.GetString(decrypted, 0, decrypted.Length);
|
||
}
|
||
|
||
#endregion
|
||
|
||
#region 将一段文本加密后保存到一个文件
|
||
|
||
/// <summary>
|
||
/// 将一段文本加密后保存到一个文件
|
||
/// </summary>
|
||
/// <param name="toEncryptText">要加密的文本数据</param>
|
||
/// <param name="filePath">要保存的文件</param>
|
||
/// <returns>是否加密成功</returns>
|
||
public static void EncryptToFile(this string toEncryptText, string filePath)
|
||
{
|
||
using var tmpFileStream = new FileStream(filePath, FileMode.OpenOrCreate, FileAccess.Write, FileShare.None, 1024, true);
|
||
using var encryptor = _rc2Csp.CreateEncryptor(_key, _iv);
|
||
var msEncrypt = new MemoryStream();
|
||
using var csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write);
|
||
var tmp = _textConverter.GetBytes(toEncryptText);
|
||
csEncrypt.Write(tmp, 0, tmp.Length);
|
||
csEncrypt.FlushFinalBlock();
|
||
var encrypted = msEncrypt.ToArray();
|
||
tmpFileStream.Write(encrypted, 0, encrypted.Length);
|
||
}
|
||
|
||
#endregion
|
||
|
||
#region 将一个被加密的文件解密
|
||
|
||
/// <summary>
|
||
/// 将一个被加密的文件解密
|
||
/// </summary>
|
||
/// <param name="filePath">要解密的文件</param>
|
||
/// <returns>解密后的文本</returns>
|
||
public static string DecryptFromFile(this string filePath)
|
||
{
|
||
using var tmpFileStream = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.None, 1024, true);
|
||
using var decryptor = _rc2Csp.CreateDecryptor(_key, _iv);
|
||
var msDecrypt = new MemoryStream();
|
||
using var csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Write);
|
||
var tmp = new byte[tmpFileStream.Length];
|
||
tmpFileStream.Read(tmp, 0, tmp.Length);
|
||
csDecrypt.Write(tmp, 0, tmp.Length);
|
||
csDecrypt.FlushFinalBlock();
|
||
var decrypted = msDecrypt.ToArray();
|
||
return _textConverter.GetString(decrypted, 0, decrypted.Length);
|
||
}
|
||
|
||
#endregion
|
||
|
||
#region 将文本数据加密后写入一个文件
|
||
|
||
/// <summary>
|
||
/// 将文本数据加密后写入一个文件，其中，这个文件是用InitBinFile建立的，这个文件将被分成十块，
|
||
/// 用来分别保存10组不同的数据，第一个byte位保留，第2位到第21位分别用来存放每块数据的长度，但
|
||
/// 一个byte的取值为0-127，所以，用两个byte来存放一个长度。
|
||
/// </summary>
|
||
/// <param name="toEncryptText">要加密的文本数据</param>
|
||
/// <param name="filePath">要写入的文件</param>
|
||
/// <param name="dataIndex">写入第几块，取值为1--10</param>
|
||
/// <param name="IV">初始化向量</param>
|
||
/// <param name="Key">加密密匙</param>
|
||
/// <returns>是否操作成功</returns>
|
||
public static void EncryptToFile(this string toEncryptText, string filePath, int dataIndex, byte[] IV, byte[] Key)
|
||
{
|
||
if ((dataIndex > 10) && (dataIndex < 1))
|
||
{
|
||
return;
|
||
}
|
||
|
||
//打开要写入的文件，主要是为了保持原文件的内容不丢失
|
||
using var fs = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.None, 1024, true);
|
||
var index = new byte[10261];
|
||
//将读取的内容写到byte数组
|
||
fs.Read(index, 0, 10261);
|
||
|
||
//定义基本的加密转换运算
|
||
using var encryptor = _rc2Csp.CreateEncryptor(Key, IV);
|
||
var msEncrypt = new MemoryStream();
|
||
//在此加密转换流中，加密将从csEncrypt，加密后，结果在msEncrypt流中。
|
||
using var csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write);
|
||
var tmp = _textConverter.GetBytes(toEncryptText);
|
||
//将tmp输入csEncrypt,将通过Encryptor来加密。
|
||
csEncrypt.Write(tmp, 0, tmp.Length);
|
||
//输出到msEnctypt
|
||
csEncrypt.FlushFinalBlock();
|
||
|
||
//将流转成byte[]
|
||
var encrypted = msEncrypt.ToArray();
|
||
if (encrypted.Length > 1024)
|
||
{
|
||
return;
|
||
}
|
||
|
||
//得到加密后数据的大小，将结果存在指定的位置。
|
||
index[dataIndex * 2 - 1] = Convert.ToByte(Convert.ToString(encrypted.Length / 128));
|
||
index[dataIndex * 2] = Convert.ToByte(Convert.ToString(encrypted.Length % 128));
|
||
//将加密后的结果写入index（覆盖）
|
||
for (int i = 0; i < encrypted.Length; i++)
|
||
{
|
||
index[1024 * (dataIndex - 1) + 21 + i] = encrypted[i];
|
||
}
|
||
|
||
//建立文件流
|
||
using var newStream = new FileStream(filePath, FileMode.Truncate, FileAccess.Write, FileShare.None, 1024, true);
|
||
newStream.Write(index, 0, 10261);
|
||
newStream.Flush();
|
||
}
|
||
|
||
#endregion
|
||
|
||
#region 从一个文件中解密出一段文本
|
||
|
||
/// <summary>
|
||
/// 从一个文件中解密出一段文本，其中，这个文件是由InitBinFile建立的，并且由 EncryptToFile加密的
|
||
/// </summary>
|
||
/// <param name="filePath">要解密的文件</param>
|
||
/// <param name="dataIndex">要从哪一个块中解密</param>
|
||
/// <param name="iv">初始化向量</param>
|
||
/// <param name="key">解密密匙</param>
|
||
/// <returns>解密后的文本</returns>
|
||
public static string DecryptFromFile(this string filePath, int dataIndex, byte[] iv, byte[] key)
|
||
{
|
||
if ((dataIndex > 10) && (dataIndex < 1))
|
||
{
|
||
return "";
|
||
}
|
||
|
||
using var tmpFileStream = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.None, 1024, true);
|
||
using var decryptor = _rc2Csp.CreateDecryptor(key, iv);
|
||
var msDecrypt = new MemoryStream();
|
||
using var csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Write);
|
||
var index = new byte[10261];
|
||
tmpFileStream.Read(index, 0, 10261);
|
||
var count = index[dataIndex * 2 - 1] * 128 + index[dataIndex * 2];
|
||
var tmp = new byte[count];
|
||
Array.Copy(index, 1024 * (dataIndex - 1) + 21, tmp, 0, count);
|
||
csDecrypt.Write(tmp, 0, count);
|
||
csDecrypt.FlushFinalBlock();
|
||
var decrypted = msDecrypt.ToArray();
|
||
return _textConverter.GetString(decrypted, 0, decrypted.Length);
|
||
}
|
||
|
||
#endregion
|
||
|
||
#region 将一段文本加密后保存到一个文件
|
||
|
||
/// <summary>
|
||
/// 将一段文本加密后保存到一个文件
|
||
/// </summary>
|
||
/// <param name="toEncryptText">要加密的文本数据</param>
|
||
/// <param name="filePath">要保存的文件</param>
|
||
/// <param name="iv">初始化向量</param>
|
||
/// <param name="key">加密密匙</param>
|
||
/// <returns>是否加密成功</returns>
|
||
public static void EncryptToFile(this string toEncryptText, string filePath, byte[] iv, byte[] key)
|
||
{
|
||
using var tmpFileStream = new FileStream(filePath, FileMode.OpenOrCreate, FileAccess.Write, FileShare.None, 1024, true);
|
||
using var encryptor = _rc2Csp.CreateEncryptor(key, iv);
|
||
var msEncrypt = new MemoryStream();
|
||
using var csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write);
|
||
var tmp = _textConverter.GetBytes(toEncryptText);
|
||
csEncrypt.Write(tmp, 0, tmp.Length);
|
||
csEncrypt.FlushFinalBlock();
|
||
var encrypted = msEncrypt.ToArray();
|
||
tmpFileStream.Write(encrypted, 0, encrypted.Length);
|
||
tmpFileStream.Flush();
|
||
}
|
||
|
||
#endregion
|
||
|
||
#region 将一个被加密的文件解密
|
||
|
||
/// <summary>
|
||
/// 将一个被加密的文件解密
|
||
/// </summary>
|
||
/// <param name="filePath">要解密的文件</param>
|
||
/// <param name="iv">初始化向量</param>
|
||
/// <param name="key">解密密匙</param>
|
||
/// <returns>解密后的文本</returns>
|
||
public static string DecryptFromFile(this string filePath, byte[] iv, byte[] key)
|
||
{
|
||
using var tmpFileStream = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.None, 1024, true);
|
||
using var decryptor = _rc2Csp.CreateDecryptor(key, iv);
|
||
var msDecrypt = new MemoryStream();
|
||
using var csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Write);
|
||
var tmp = new byte[tmpFileStream.Length];
|
||
tmpFileStream.Read(tmp, 0, tmp.Length);
|
||
csDecrypt.Write(tmp, 0, tmp.Length);
|
||
csDecrypt.FlushFinalBlock();
|
||
var decrypted = msDecrypt.ToArray();
|
||
return _textConverter.GetString(decrypted, 0, decrypted.Length);
|
||
}
|
||
|
||
#endregion
|
||
|
||
#region 设置加密或解密的初始化向量
|
||
|
||
/// <summary>
|
||
/// 设置加密或解密的初始化向量
|
||
/// </summary>
|
||
/// <param name="s">长度等于8的ASCII字符集的字符串</param>
|
||
public static void SetIV(this string s)
|
||
{
|
||
if (s.Length != 8)
|
||
{
|
||
_iv = null;
|
||
return;
|
||
}
|
||
|
||
try
|
||
{
|
||
_iv = _asciiEncoding.GetBytes(s);
|
||
}
|
||
catch (Exception)
|
||
{
|
||
_iv = null;
|
||
}
|
||
}
|
||
|
||
#endregion
|
||
|
||
#region 设置加密或解密的密匙
|
||
|
||
/// <summary>
|
||
/// 设置加密或解密的密匙
|
||
/// </summary>
|
||
/// <param name="s">长度等于16的ASCII字符集的字符串</param>
|
||
public static void SetKey(this string s)
|
||
{
|
||
if (s.Length != 16)
|
||
{
|
||
_key = null;
|
||
return;
|
||
}
|
||
|
||
try
|
||
{
|
||
_key = _asciiEncoding.GetBytes(s);
|
||
}
|
||
catch (Exception)
|
||
{
|
||
_key = null;
|
||
}
|
||
}
|
||
|
||
#endregion
|
||
}
|
||
|
||
/// <summary>
|
||
/// 对称加密解密算法类
|
||
/// </summary>
|
||
public static class Rijndael
|
||
{
|
||
private static string _key;
|
||
private static SymmetricAlgorithm _mobjCryptoService;
|
||
|
||
/// <summary>
|
||
/// 对称加密类的构造函数
|
||
/// </summary>
|
||
public static void SymmetricMethod()
|
||
{
|
||
_mobjCryptoService = new RijndaelManaged();
|
||
_key = "Guz(%&hj7x89H$yuBI0456FtmaT5&fvHUFCy76*h%(HilJ$lhj!y6&(*jkP87jH7";
|
||
}
|
||
|
||
/// <summary>
|
||
/// 获得密钥
|
||
/// </summary>
|
||
/// <returns>密钥</returns>
|
||
private static byte[] GetLegalKey()
|
||
{
|
||
var sTemp = _key;
|
||
_mobjCryptoService.GenerateKey();
|
||
var bytTemp = _mobjCryptoService.Key;
|
||
var keyLength = bytTemp.Length;
|
||
if (sTemp.Length > keyLength)
|
||
{
|
||
sTemp = sTemp.Substring(0, keyLength);
|
||
}
|
||
else if (sTemp.Length < keyLength)
|
||
{
|
||
sTemp = sTemp.PadRight(keyLength, ' ');
|
||
}
|
||
|
||
return Encoding.ASCII.GetBytes(sTemp);
|
||
}
|
||
|
||
/// <summary>
|
||
/// 获得初始向量IV
|
||
/// </summary>
|
||
/// <returns>初试向量IV</returns>
|
||
private static byte[] GetLegalIV()
|
||
{
|
||
var sTemp = "E4ghj*Ghg7!rNIfb&95GUY86GfghUber57HBh(u%g6HJ($jhWk7&!hg4ui%$hjk";
|
||
_mobjCryptoService.GenerateIV();
|
||
var bytTemp = _mobjCryptoService.IV;
|
||
var ivLength = bytTemp.Length;
|
||
if (sTemp.Length > ivLength)
|
||
{
|
||
sTemp = sTemp.Substring(0, ivLength);
|
||
}
|
||
else if (sTemp.Length < ivLength)
|
||
{
|
||
sTemp = sTemp.PadRight(ivLength, ' ');
|
||
}
|
||
|
||
return Encoding.ASCII.GetBytes(sTemp);
|
||
}
|
||
|
||
/// <summary>
|
||
/// 加密方法
|
||
/// </summary>
|
||
/// <param name="source">待加密的串</param>
|
||
/// <returns>经过加密的串</returns>
|
||
public static string Encrypto(this string source)
|
||
{
|
||
var bytIn = Encoding.UTF8.GetBytes(source);
|
||
var ms = new MemoryStream();
|
||
_mobjCryptoService.Key = GetLegalKey();
|
||
_mobjCryptoService.IV = GetLegalIV();
|
||
using var encrypto = _mobjCryptoService.CreateEncryptor();
|
||
using var cs = new CryptoStream(ms, encrypto, CryptoStreamMode.Write);
|
||
cs.Write(bytIn, 0, bytIn.Length);
|
||
cs.FlushFinalBlock();
|
||
var bytOut = ms.ToArray();
|
||
return Convert.ToBase64String(bytOut);
|
||
}
|
||
|
||
/// <summary>
|
||
/// 解密方法
|
||
/// </summary>
|
||
/// <param name="source">待解密的串</param>
|
||
/// <returns>经过解密的串</returns>
|
||
public static string Decrypto(this string source)
|
||
{
|
||
var bytIn = Convert.FromBase64String(source);
|
||
var ms = new MemoryStream(bytIn, 0, bytIn.Length);
|
||
_mobjCryptoService.Key = GetLegalKey();
|
||
_mobjCryptoService.IV = GetLegalIV();
|
||
using var encrypto = _mobjCryptoService.CreateDecryptor();
|
||
using var cs = new CryptoStream(ms, encrypto, CryptoStreamMode.Read);
|
||
using var sr = new StreamReader(cs);
|
||
return sr.ReadToEnd();
|
||
}
|
||
}
|
||
}
|