using?System;
using?System.Collections.Generic;
using?System.Linq;
using?System.Text;
using?System.Security.Cryptography;
using?System.IO;
using?System.Web;

namespace?Thewolfs.Framework.Text
{
????///?<summary>
????///?加密類
????///?</summary>
????public?class?TwEncode
????{

????????#region?MD5加密類型，0為32位md5加密，1為64位md5加密
????????///?<summary>
????????///?密碼加密函數
????????///?</summary>
????????///?<param?name="encrypType">加密類型，0為32位md5加密，1為64位md5加密</param>
????????///?<param?name="originalStr">加密前字符串</param>
????????///?<returns>md5加密后的字符串</returns>
????????private?static?string?EncryptPass(byte?encrypType,?string?originalStr)
????????{
????????????string?strReturn?=?string.Empty;
????????????switch?(encrypType)
????????????{
????????????????case?0:
????????????????????strReturn?=?System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(originalStr,?"MD5");
????????????????????break;
????????????????default:
????????????????????strReturn?=?System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(originalStr,?"MD5");
????????????????????break;
????????????}
????????????return?strReturn;
????????????//throw?new?System.NotImplementedException();
????????}

????????///?<summary>
????????///?32位的MD5加密
????????///?</summary>
????????///?<param?name="toCryString"></param>
????????///?<returns></returns>
????????public?static?string?EncodeByMD5_32(string?toCryString)
????????{
????????????return?TwEncode.EncryptPass(0,?toCryString);
????????}

????????///?<summary>
????????///?64位的MD5加密
????????///?</summary>
????????///?<param?name="toCryString"></param>
????????///?<returns></returns>
????????public?static?string?EncodeByMD5_64(string?toCryString)
????????{
????????????return?TwEncode.EncryptPass(1,?toCryString);
????????}

????????#endregion

????????#region?Base64加密碼?/?解密
????????///?<summary>
????????///?用Base64加密
????????///?</summary>
????????///?<param?name="strText"></param>
????????///?<returns></returns>
????????public?static?string?EncodeByBase64(String?strText)
????????{
????????????return?Encrypt(strText,?"&%#@?,:*");
????????}

????????///?<summary>
????????///?解密Base64加密的密碼
????????///?</summary>
????????///?<param?name="strText"></param>
????????///?<returns></returns>
????????public?static?String?DecodeByBase64(String?strText)
????????{
????????????return?Decrypt(strText,?"&%#@?,:*");
????????}

????????///?<summary>
????????///?Base64加密函數
????????///?</summary>
????????///?<param?name="strText"></param>
????????///?<param?name="strEncrKey"></param>
????????///?<returns></returns>
????????private?static?String?Encrypt(String?strText,?String?strEncrKey)
????????{
????????????Byte[]?byKey?=?{?};
????????????Byte[]?IV?=?{?0x12,?0x34,?0x56,?0x78,?0x90,?0xAB,?0xCD,?0xEF?};
????????????try
????????????{
????????????????byKey?=?System.Text.Encoding.UTF8.GetBytes(strEncrKey.Substring(0,?8));
????????????????DESCryptoServiceProvider?des?=?new?DESCryptoServiceProvider();
????????????????Byte[]?inputByteArray?=?Encoding.UTF8.GetBytes(strText);
????????????????MemoryStream?ms?=?new?MemoryStream();
????????????????CryptoStream?cs?=?new?CryptoStream(ms,?des.CreateEncryptor(byKey,?IV),?CryptoStreamMode.Write);
????????????????cs.Write(inputByteArray,?0,?inputByteArray.Length);
????????????????cs.FlushFinalBlock();
????????????????return?Convert.ToBase64String(ms.ToArray());
????????????}
????????????catch?(Exception?ex)
????????????{
????????????????return?ex.Message?+?ex.ToString()?+?ex.Source;
????????????}
????????}

????????///?<summary>
????????///?Base64解密函數
????????///?</summary>
????????///?<param?name="strText"></param>
????????///?<param?name="sDecrKey"></param>
????????///?<returns></returns>
????????private?static?String?Decrypt(String?strText,?String?sDecrKey)
????????{
????????????Byte[]?byKey?=?{?};
????????????Byte[]?IV?=?{?0x12,?0x34,?0x56,?0x78,?0x90,?0xAB,?0xCD,?0xEF?};
????????????Byte[]?inputByteArray?=?new?byte[strText.Length];
????????????try
????????????{
????????????????byKey?=?System.Text.Encoding.UTF8.GetBytes(sDecrKey.Substring(0,?8));
????????????????DESCryptoServiceProvider?des?=?new?DESCryptoServiceProvider();
????????????????inputByteArray?=?Convert.FromBase64String(strText);
????????????????MemoryStream?ms?=?new?MemoryStream();
????????????????CryptoStream?cs?=?new?CryptoStream(ms,?des.CreateDecryptor(byKey,?IV),?CryptoStreamMode.Write);
????????????????cs.Write(inputByteArray,?0,?inputByteArray.Length);
????????????????cs.FlushFinalBlock();
????????????????System.Text.Encoding?encoding?=?System.Text.Encoding.UTF8;
????????????????return?encoding.GetString(ms.ToArray());
????????????}
????????????catch?(Exception?ex)
????????????{
????????????????return?ex.Message?+?ex.ToString()?+?ex.Source;
????????????}
????????}
????????#endregion

????????#region?SHA1?加密?40位
????????///?<summary>
????????///?使用SHA1加密字符串。?40位
????????///?</summary>
????????///?<param?name="inputString">輸入字符串。</param>
????????///?<returns>加密后的字符串。（40個字符）</returns>
????????public?static?string?EncodeBySHA1(string?inputString)
????????{
????????????SHA1CryptoServiceProvider?sha1?=?new?SHA1CryptoServiceProvider();
????????????byte[]?encryptedBytes?=?sha1.ComputeHash(Encoding.ASCII.GetBytes(inputString));
????????????StringBuilder?sb?=?new?StringBuilder();
????????????for?(int?i?=?0;?i?<?encryptedBytes.Length;?i++)
????????????{
????????????????sb.AppendFormat("{0:x2}",?encryptedBytes[i]);
????????????}
????????????return?sb.ToString();
????????}
????????#endregion

????????#region?DES?加密/解密
????????private?static?byte[]?key?=?ASCIIEncoding.ASCII.GetBytes("caikelun");
????????private?static?byte[]?iv?=?ASCIIEncoding.ASCII.GetBytes("12345678");

????????///?<summary>
????????///?DES加密。
????????///?</summary>
????????///?<param?name="inputString">輸入字符串。</param>
????????///?<returns>加密后的字符串。</returns>
????????public?static?string?EncodeByDES(string?inputString)
????????{
????????????MemoryStream?ms?=?null;
????????????CryptoStream?cs?=?null;
????????????StreamWriter?sw?=?null;

????????????DESCryptoServiceProvider?des?=?new?DESCryptoServiceProvider();
????????????try
????????????{
????????????????ms?=?new?MemoryStream();
????????????????cs?=?new?CryptoStream(ms,?des.CreateEncryptor(key,?iv),?CryptoStreamMode.Write);
????????????????sw?=?new?StreamWriter(cs);
????????????????sw.Write(inputString);
????????????????sw.Flush();
????????????????cs.FlushFinalBlock();
????????????????return?Convert.ToBase64String(ms.GetBuffer(),?0,?(int)ms.Length);
????????????}
????????????finally
????????????{
????????????????if?(sw?!=?null)?sw.Close();
????????????????if?(cs?!=?null)?cs.Close();
????????????????if?(ms?!=?null)?ms.Close();
????????????}
????????}

????????///?<summary>
????????///?DES解密。
????????///?</summary>
????????///?<param?name="inputString">輸入字符串。</param>
????????///?<returns>解密后的字符串。</returns>
????????public?static?string?DecodeByDES(string?inputString)
????????{
????????????MemoryStream?ms?=?null;
????????????CryptoStream?cs?=?null;
????????????StreamReader?sr?=?null;

????????????DESCryptoServiceProvider?des?=?new?DESCryptoServiceProvider();
????????????try
????????????{
????????????????ms?=?new?MemoryStream(Convert.FromBase64String(inputString));
????????????????cs?=?new?CryptoStream(ms,?des.CreateDecryptor(key,?iv),?CryptoStreamMode.Read);
????????????????sr?=?new?StreamReader(cs);
????????????????return?sr.ReadToEnd();
????????????}
????????????finally
????????????{
????????????????if?(sr?!=?null)?sr.Close();
????????????????if?(cs?!=?null)?cs.Close();
????????????????if?(ms?!=?null)?ms.Close();
????????????}
????????}

????????#endregion

????????#region?HTML?&?URL地址加密?-?.NET的方法
????????///?<summary>
????????///?URL地址加密?-?.NET的方法
????????///?</summary>
????????///?<param?name="strUrl">URL地址</param>
????????///?<returns></returns>
????????public?static?string?UrlEncode(string?strUrl)
????????{
????????????if?(string.IsNullOrEmpty(strUrl))
????????????{
????????????????return?strUrl;
????????????}
????????????return?System.Web.HttpUtility.UrlEncode(strUrl);
????????}

????????///?<summary>
????????///?URL地址解密?-?.NET的方法
????????///?</summary>
????????///?<param?name="strURL">加密過的URL地址</param>
????????///?<returns></returns>
????????public?static?string?UrlDecode(string?strURL)
????????{
????????????if?(string.IsNullOrEmpty(strURL))
????????????{
????????????????return?strURL;
????????????}

????????????return?System.Web.HttpUtility.UrlEncode(strURL);
????????}


????????///?<summary>
????????///?返回?HTML?字符串的編碼結果
????????///?</summary>
????????///?<param?name="str">字符串</param>
????????///?<returns>編碼結果</returns>
????????public?static?string?HtmlEncode(string?str)
????????{
????????????return?HttpUtility.HtmlEncode(str);
????????}

????????///?<summary>
????????///?返回?HTML?字符串的解碼結果
????????///?</summary>
????????///?<param?name="str">字符串</param>
????????///?<returns>解碼結果</returns>
????????public?static?string?HtmlDecode(string?str)
????????{
????????????return?HttpUtility.HtmlDecode(str);
????????}
????????#endregion

????????#region?SHA256函數
????????///?<summary>
????????///?SHA256函數
????????///?</summary>
????????///?<param?name="str">原始字符串</param>
????????///?<returns>SHA256結果</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);??//返回長度為44字節的字符串
????????}
????????#endregion


????}
}

轉載于:https://www.cnblogs.com/netAICode/archive/2009/09/24/1572983.html

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