C# 常用字符串加密解密方法
using System;
using System.Collections.Generic;using System.IO;using System.Linq;using System.Security.Cryptography;using System.Text;using System.Text.RegularExpressions;using System.Web.Security;namespace HuaTong.General.Utility{ /// <summary>
/// 加密工具类
/// </summary>
public class EncryptHelper
{
//默认密钥
private static string AESKey = "[45/*YUIdse..e;]";
private static string DESKey = "[&HdN72]";
/// <summary>
/// AES加密
/// </summary>
public static string AESEncrypt(string value, string _aeskey = null)
{
if (string.IsNullOrEmpty(_aeskey))
{
_aeskey = AESKey;
}
byte[] keyArray = Encoding.UTF8.GetBytes(_aeskey);
byte[] toEncryptArray = Encoding.UTF8.GetBytes(value);
RijndaelManaged rDel = new RijndaelManaged();
rDel.Key = keyArray;
rDel.Mode = CipherMode.ECB;
rDel.Padding = PaddingMode.PKCS7;
ICryptoTransform cTransform = rDel.CreateEncryptor();
byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);
return Convert.ToBase64String(resultArray, 0, resultArray.Length);
}
/// <summary>
/// AES解密
/// </summary>
public static string AESDecrypt(string value, string _aeskey = null)
{
try
{
if (string.IsNullOrEmpty(_aeskey))
{
_aeskey = AESKey;
}
byte[] keyArray = Encoding.UTF8.GetBytes(_aeskey);
byte[] toEncryptArray = Convert.FromBase64String(value);
RijndaelManaged rDel = new RijndaelManaged();
rDel.Key = keyArray;
rDel.Mode = CipherMode.ECB;
rDel.Padding = PaddingMode.PKCS7;
ICryptoTransform cTransform = rDel.CreateDecryptor();
byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);
return Encoding.UTF8.GetString(resultArray);
}
catch
{
return string.Empty;
}
}
/// <summary>
/// DES加密
/// </summary>
public static string DESEncrypt(string value, string _deskey = null)
{
if (string.IsNullOrEmpty(_deskey))
{
_deskey = DESKey;
}
byte[] keyArray = Encoding.UTF8.GetBytes(_deskey);
byte[] toEncryptArray = Encoding.UTF8.GetBytes(value);
DESCryptoServiceProvider rDel = new DESCryptoServiceProvider();
rDel.Key = keyArray;
rDel.Mode = CipherMode.ECB;
rDel.Padding = PaddingMode.PKCS7;
ICryptoTransform cTransform = rDel.CreateEncryptor();
byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);
return Convert.ToBase64String(resultArray, 0, resultArray.Length);
}
/// <summary>
/// DES解密
/// </summary>
public static string DESDecrypt(string value, string _deskey = null)
{
try
{
if (string.IsNullOrEmpty(_deskey))
{
_deskey = DESKey;
}
byte[] keyArray = Encoding.UTF8.GetBytes(_deskey);
byte[] toEncryptArray = Convert.FromBase64String(value);
DESCryptoServiceProvider rDel = new DESCryptoServiceProvider();
rDel.Key = keyArray;
rDel.Mode = CipherMode.ECB;
rDel.Padding = PaddingMode.PKCS7;
ICryptoTransform cTransform = rDel.CreateDecryptor();
byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);
return Encoding.UTF8.GetString(resultArray);
}
catch
{
return string.Empty;
}
}
public static string MD5(string value)
{
byte[] result = Encoding.UTF8.GetBytes(value);
MD5 md5 = new MD5CryptoServiceProvider();
byte[] output = md5.ComputeHash(result);
return BitConverter.ToString(output).Replace("-", "");
}
public static string HMACMD5(string value, string hmacKey)
{
HMACSHA1 hmacsha1 = new HMACSHA1(Encoding.UTF8.GetBytes(hmacKey));
byte[] result = System.Text.Encoding.UTF8.GetBytes(value);
byte[] output = hmacsha1.ComputeHash(result);
return BitConverter.ToString(output).Replace("-", "");
}
/// <summary>
/// base64编码
/// </summary>
/// <returns></returns>
public static string Base64Encode(string value)
{
string result = Convert.ToBase64String(Encoding.Default.GetBytes(value));
return result;
}
/// <summary>
/// base64解码
/// </summary>
/// <returns></returns>
public static string Base64Decode(string value)
{
string result = Encoding.Default.GetString(Convert.FromBase64String(value));
return result;
}
}
}转自：http://www.cnblogs.com/password1/p/5867781.html#3510274