620 lines
23 KiB
C#
620 lines
23 KiB
C#
using System;
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using System.Text;
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using System.IO;
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using System.Security.Cryptography;
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namespace WinformGeneralDeveloperFrame.Commons
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{
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/// <summary>
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/// DES对称加解密、AES RijndaelManaged加解密、Base64加密解密、MD5加密等操作辅助类
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/// </summary>
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public sealed class EncodeHelper
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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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/// 注意DEFAULT_ENCRYPT_KEY的长度为8位(如果要增加或者减少key长度,调整IV的长度就是了)
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/// </summary>
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public const string DEFAULT_ENCRYPT_KEY = "12345678";
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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"></param>
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/// <returns></returns>
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public static string DesEncrypt(string strText)
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{
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try
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{
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return DesEncrypt(strText, DEFAULT_ENCRYPT_KEY);
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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">解密字符串</param>
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/// <returns></returns>
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public static string DesDecrypt(string strText)
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{
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try
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{
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return DesDecrypt(strText, DEFAULT_ENCRYPT_KEY);
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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,注意strEncrKey的长度为8位
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/// </summary>
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/// <param name="strText">待加密字符串</param>
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/// <param name="strEncrKey">加密键</param>
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/// <returns></returns>
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public static string DesEncrypt(string strText, string strEncrKey)
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{
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byte[] byKey = null;
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byte[] IV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
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byKey = Encoding.UTF8.GetBytes(strEncrKey.Substring(0, 8));
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DESCryptoServiceProvider des = new DESCryptoServiceProvider();
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byte[] inputByteArray = Encoding.UTF8.GetBytes(strText);
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MemoryStream ms = new MemoryStream();
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CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(byKey, IV), CryptoStreamMode.Write);
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cs.Write(inputByteArray, 0, inputByteArray.Length);
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cs.FlushFinalBlock();
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return Convert.ToBase64String(ms.ToArray());
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}
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/// <summary>
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/// 解密字符串,注意strEncrKey的长度为8位
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/// </summary>
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/// <param name="strText">待解密的字符串</param>
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/// <param name="sDecrKey">解密键</param>
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/// <returns>解密后的字符串</returns>
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public static string DesDecrypt(string strText, string sDecrKey)
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{
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byte[] byKey = null;
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byte[] IV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
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byte[] inputByteArray = new Byte[strText.Length];
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byKey = Encoding.UTF8.GetBytes(sDecrKey.Substring(0, 8));
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DESCryptoServiceProvider des = new DESCryptoServiceProvider();
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inputByteArray = Convert.FromBase64String(strText);
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MemoryStream ms = new MemoryStream();
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CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(byKey, IV), CryptoStreamMode.Write);
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cs.Write(inputByteArray, 0, inputByteArray.Length);
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cs.FlushFinalBlock();
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Encoding encoding = new UTF8Encoding();
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return encoding.GetString(ms.ToArray());
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}
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/// <summary>
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/// 加密数据文件,注意strEncrKey的长度为8位
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/// </summary>
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/// <param name="m_InFilePath">待加密的文件路径</param>
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/// <param name="m_OutFilePath">输出文件路径</param>
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/// <param name="strEncrKey">加密键</param>
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public static void DesEncrypt(string m_InFilePath, string m_OutFilePath, string strEncrKey)
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{
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byte[] byKey = null;
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byte[] IV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
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byKey = Encoding.UTF8.GetBytes(strEncrKey.Substring(0, 8));
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FileStream fin = new FileStream(m_InFilePath, FileMode.Open, FileAccess.Read);
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FileStream fout = new FileStream(m_OutFilePath, FileMode.OpenOrCreate, FileAccess.Write);
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fout.SetLength(0);
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//Create variables to help with read and write.
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byte[] bin = new byte[100]; //This is intermediate storage for the encryption.
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long rdlen = 0; //This is the total number of bytes written.
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long totlen = fin.Length; //This is the total length of the input file.
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int len; //This is the number of bytes to be written at a time.
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DES des = new DESCryptoServiceProvider();
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CryptoStream encStream = new CryptoStream(fout, des.CreateEncryptor(byKey, IV), CryptoStreamMode.Write);
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//Read from the input file, then encrypt and write to the output file.
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while (rdlen < totlen)
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{
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len = fin.Read(bin, 0, 100);
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encStream.Write(bin, 0, len);
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rdlen = rdlen + len;
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}
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encStream.Close();
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fout.Close();
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fin.Close();
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}
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/// <summary>
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/// 解密数据文件,注意strEncrKey的长度为8位
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/// </summary>
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/// <param name="m_InFilePath">待解密的文件路径</param>
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/// <param name="m_OutFilePath">输出路径</param>
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/// <param name="sDecrKey">解密键</param>
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public static void DesDecrypt(string m_InFilePath, string m_OutFilePath, string sDecrKey)
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{
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byte[] byKey = null;
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byte[] IV = { 0x12, 0x34, 0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };
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byKey = Encoding.UTF8.GetBytes(sDecrKey.Substring(0, 8));
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FileStream fin = new FileStream(m_InFilePath, FileMode.Open, FileAccess.Read);
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FileStream fout = new FileStream(m_OutFilePath, FileMode.OpenOrCreate, FileAccess.Write);
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fout.SetLength(0);
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//Create variables to help with read and write.
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byte[] bin = new byte[100]; //This is intermediate storage for the encryption.
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long rdlen = 0; //This is the total number of bytes written.
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long totlen = fin.Length; //This is the total length of the input file.
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int len; //This is the number of bytes to be written at a time.
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DES des = new DESCryptoServiceProvider();
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CryptoStream encStream = new CryptoStream(fout, des.CreateDecryptor(byKey, IV), CryptoStreamMode.Write);
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//Read from the input file, then encrypt and write to the output file.
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while (rdlen < totlen)
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{
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len = fin.Read(bin, 0, 100);
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encStream.Write(bin, 0, len);
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rdlen = rdlen + len;
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}
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encStream.Close();
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fout.Close();
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fin.Close();
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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 = { 0x41, 0x72, 0x65, 0x79, 0x6F, 0x75, 0x6D, 0x79,
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0x53,0x6E, 0x6F, 0x77, 0x6D, 0x61, 0x6E, 0x3F };
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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 AES_Encrypt(string encryptString)
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{
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return AES_Encrypt(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 AES_Encrypt(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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RijndaelManaged rijndaelProvider = new RijndaelManaged();
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rijndaelProvider.Key = Encoding.UTF8.GetBytes(encryptKey.Substring(0, 32));
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rijndaelProvider.IV = Keys;
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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 AES_Decrypt(string decryptString)
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{
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return AES_Decrypt(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 AES_Decrypt(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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RijndaelManaged rijndaelProvider = new RijndaelManaged();
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rijndaelProvider.Key = Encoding.UTF8.GetBytes(decryptKey);
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rijndaelProvider.IV = Keys;
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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(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(string sourceString, int startIndex, int length, string tailString)
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{
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string myResult = sourceString;
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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 (System.Text.RegularExpressions.Regex.IsMatch(sourceString, "[\u0800-\u4e00]+") ||
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System.Text.RegularExpressions.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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else
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{
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return sourceString.Substring(startIndex,
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((length + startIndex) > sourceString.Length) ? (sourceString.Length - startIndex) : length);
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}
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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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{ //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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int[] 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 = length + 1;
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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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myResult = Encoding.Default.GetString(bsResult);
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myResult = 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">文件流对象</param>
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/// <param name="encryptKey">加密键</param>
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/// <returns></returns>
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public static CryptoStream AES_EncryptStrream(FileStream fs, 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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RijndaelManaged rijndaelProvider = new RijndaelManaged();
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rijndaelProvider.Key = Encoding.UTF8.GetBytes(encryptKey);
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rijndaelProvider.IV = Keys;
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ICryptoTransform encrypto = rijndaelProvider.CreateEncryptor();
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CryptoStream cytptostreamEncr = new CryptoStream(fs, encrypto, CryptoStreamMode.Write);
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return cytptostreamEncr;
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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">文件流对象</param>
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/// <param name="decryptKey">解密键</param>
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/// <returns></returns>
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public static CryptoStream AES_DecryptStream(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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RijndaelManaged rijndaelProvider = new RijndaelManaged();
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rijndaelProvider.Key = Encoding.UTF8.GetBytes(decryptKey);
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rijndaelProvider.IV = Keys;
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ICryptoTransform Decrypto = rijndaelProvider.CreateDecryptor();
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CryptoStream cytptostreamDecr = new CryptoStream(fs, Decrypto, CryptoStreamMode.Read);
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return cytptostreamDecr;
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}
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/// <summary>
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/// 对指定文件加密
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/// </summary>
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/// <param name="InputFile">输入文件</param>
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/// <param name="OutputFile">输出文件</param>
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/// <returns></returns>
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public static bool AES_EncryptFile(string InputFile, string OutputFile)
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{
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try
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{
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string decryptKey = "www.iqidi.com";
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FileStream fr = new FileStream(InputFile, FileMode.Open);
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FileStream fren = new FileStream(OutputFile, FileMode.Create);
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CryptoStream Enfr = AES_EncryptStrream(fren, decryptKey);
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byte[] bytearrayinput = new byte[fr.Length];
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fr.Read(bytearrayinput, 0, bytearrayinput.Length);
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Enfr.Write(bytearrayinput, 0, bytearrayinput.Length);
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Enfr.Close();
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fr.Close();
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fren.Close();
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}
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catch
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{
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//文件异常
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return false;
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}
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return true;
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}
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/// <summary>
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/// 对指定的文件解压缩
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/// </summary>
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/// <param name="InputFile">输入文件</param>
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/// <param name="OutputFile">输出文件</param>
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/// <returns></returns>
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public static bool AES_DecryptFile(string InputFile, string OutputFile)
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{
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try
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{
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string decryptKey = "www.iqidi.com";
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FileStream fr = new FileStream(InputFile, FileMode.Open);
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FileStream frde = new FileStream(OutputFile, FileMode.Create);
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CryptoStream Defr = AES_DecryptStream(fr, decryptKey);
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byte[] bytearrayoutput = new byte[1024];
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int m_count = 0;
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do
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{
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m_count = Defr.Read(bytearrayoutput, 0, bytearrayoutput.Length);
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frde.Write(bytearrayoutput, 0, m_count);
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if (m_count < bytearrayoutput.Length)
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break;
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} while (true);
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Defr.Close();
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fr.Close();
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frde.Close();
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}
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catch
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{
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//文件异常
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return false;
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}
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return true;
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}
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#endregion
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#region Base64加密解密
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/// <summary>
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||
/// Base64是一種使用64基的位置計數法。它使用2的最大次方來代表僅可列印的ASCII 字元。
|
||
/// 這使它可用來作為電子郵件的傳輸編碼。在Base64中的變數使用字元A-Z、a-z和0-9 ，
|
||
/// 這樣共有62個字元，用來作為開始的64個數字，最後兩個用來作為數字的符號在不同的
|
||
/// 系統中而不同。
|
||
/// Base64加密
|
||
/// </summary>
|
||
/// <param name="str">Base64方式加密字符串</param>
|
||
/// <returns></returns>
|
||
public static string Base64Encrypt(string str)
|
||
{
|
||
byte[] encbuff = System.Text.Encoding.UTF8.GetBytes(str);
|
||
return Convert.ToBase64String(encbuff);
|
||
}
|
||
|
||
/// <summary>
|
||
/// Base64解密字符串
|
||
/// </summary>
|
||
/// <param name="str">待解密的字符串</param>
|
||
/// <returns></returns>
|
||
public static string Base64Decrypt(string str)
|
||
{
|
||
byte[] decbuff = Convert.FromBase64String(str);
|
||
return System.Text.Encoding.UTF8.GetString(decbuff);
|
||
}
|
||
#endregion
|
||
|
||
#region MD5加密
|
||
|
||
/// <summary>
|
||
/// 使用MD5加密字符串
|
||
/// </summary>
|
||
/// <param name="strText">待加密的字符串</param>
|
||
/// <returns>MD5加密后的字符串</returns>
|
||
public static string MD5Encrypt(string strText)
|
||
{
|
||
MD5 md5 = new MD5CryptoServiceProvider();
|
||
byte[] result = md5.ComputeHash(Encoding.Default.GetBytes(strText));
|
||
return Encoding.Default.GetString(result);
|
||
}
|
||
|
||
/// <summary>
|
||
/// 使用MD5加密的Hash表
|
||
/// </summary>
|
||
/// <param name="input">待加密字符串</param>
|
||
/// <returns></returns>
|
||
public static string MD5EncryptHash(String input)
|
||
{
|
||
MD5 md5 = new MD5CryptoServiceProvider();
|
||
//the GetBytes method returns byte array equavalent of a string
|
||
byte[] res = md5.ComputeHash(Encoding.Default.GetBytes(input), 0, input.Length);
|
||
char[] temp = new char[res.Length];
|
||
//copy to a char array which can be passed to a String constructor
|
||
Array.Copy(res, temp, res.Length);
|
||
//return the result as a string
|
||
return new String(temp);
|
||
}
|
||
|
||
/// <summary>
|
||
/// 使用Md5加密为16进制字符串
|
||
/// </summary>
|
||
/// <param name="input">待加密字符串</param>
|
||
/// <returns></returns>
|
||
public static string MD5EncryptHashHex(String input)
|
||
{
|
||
MD5 md5 = new MD5CryptoServiceProvider();
|
||
//the GetBytes method returns byte array equavalent of a string
|
||
byte[] res = md5.ComputeHash(Encoding.Default.GetBytes(input), 0, input.Length);
|
||
|
||
String returnThis = string.Empty;
|
||
|
||
for (int i = 0; i < res.Length; i++)
|
||
{
|
||
returnThis += Uri.HexEscape((char)res[i]);
|
||
}
|
||
returnThis = returnThis.Replace("%", "");
|
||
returnThis = returnThis.ToLower();
|
||
|
||
return returnThis;
|
||
}
|
||
|
||
/// <summary>
|
||
/// MD5 三次加密算法.计算过程: (QQ使用)
|
||
/// 1. 验证码转为大写
|
||
/// 2. 将密码使用这个方法进行三次加密后,与验证码进行叠加
|
||
/// 3. 然后将叠加后的内容再次MD5一下,得到最终验证码的值
|
||
/// </summary>
|
||
/// <param name="s">待加密字符串</param>
|
||
/// <returns></returns>
|
||
public static string EncyptMD5_3_16(string s)
|
||
{
|
||
MD5 md5 = MD5CryptoServiceProvider.Create();
|
||
byte[] bytes = System.Text.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().ToUpper();
|
||
}
|
||
#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(string str)
|
||
{
|
||
byte[] SHA256Data = Encoding.UTF8.GetBytes(str);
|
||
SHA256Managed Sha256 = new SHA256Managed();
|
||
byte[] Result = Sha256.ComputeHash(SHA256Data);
|
||
return Convert.ToBase64String(Result); //返回长度为44字节的字符串
|
||
}
|
||
|
||
/// <summary>
|
||
/// 加密字符串
|
||
/// </summary>
|
||
/// <param name="input">待加密的字符串</param>
|
||
/// <returns></returns>
|
||
public static string EncryptString(string input)
|
||
{
|
||
return MD5Utils.AddMD5Profix(Base64Util.Encrypt(MD5Utils.AddMD5Profix(input)));
|
||
//return Base64.Encrypt(MD5.AddMD5Profix(Base64.Encrypt(input)));
|
||
}
|
||
|
||
/// <summary>
|
||
/// 解密加过密的字符串
|
||
/// </summary>
|
||
/// <param name="input">待解密的字符串</param>
|
||
/// <param name="throwException">解密失败是否抛异常</param>
|
||
/// <returns></returns>
|
||
public static string DecryptString(string input, bool throwException)
|
||
{
|
||
string res = "";
|
||
try
|
||
{
|
||
res = input;// Base64.Decrypt(input);
|
||
if (MD5Utils.ValidateValue(res))
|
||
{
|
||
return MD5Utils.RemoveMD5Profix(Base64Util.Decrypt(MD5Utils.RemoveMD5Profix(res)));
|
||
}
|
||
else
|
||
{
|
||
throw new Exception("字符串无法转换成功！");
|
||
}
|
||
}
|
||
catch
|
||
{
|
||
if (throwException)
|
||
{
|
||
throw;
|
||
}
|
||
else
|
||
{
|
||
return "";
|
||
}
|
||
}
|
||
}
|
||
}
|
||
} |