.net常用加密解密方法

privatebyte[] _power;
///<summary>
/// 用户权限
///</summary>
publicbyte[] Power
{
set { _power = value; }
get { return _power; }
}
sql:
Power binary 4000
解密：
Encoding.Unicode.GetString(model.Power);
加密：
byte[] Power =new UnicodeEncoding().GetBytes(this.HidPowers.Value);
model.Power = Power;

using System;
using System.Security.Cryptography; 
using System.Text;
namespace BeidouWY.Common.DEncrypt
{
///<summary>
/// Encrypt 的摘要说明。
/// LiTianPing
///</summary>
publicclass DEncrypt
{
///<summary>
/// 构造方法
///</summary>
public DEncrypt() 
{ 
} 

#region 使用 缺省密钥字符串 加密/解密string

///<summary>
/// 使用缺省密钥字符串加密string
///</summary>
///<param name="original">明文</param>
///<returns>密文</returns>
publicstaticstring Encrypt(string original)
{
return Encrypt(original,"MATICSOFT");
}
///<summary>
/// 使用缺省密钥字符串解密string
///</summary>
///<param name="original">密文</param>
///<returns>明文</returns>
publicstaticstring Decrypt(string original)
{
return Decrypt(original,"MATICSOFT",System.Text.Encoding.Default);
}

#endregion

#region 使用 给定密钥字符串 加密/解密string
///<summary>
/// 使用给定密钥字符串加密string
///</summary>
///<param name="original">原始文字</param>
///<param name="key">密钥</param>
///<param name="encoding">字符编码方案</param>
///<returns>密文</returns>
publicstaticstring Encrypt(string original, string key) 
{ 
byte[] buff = System.Text.Encoding.Default.GetBytes(original); 
byte[] kb = System.Text.Encoding.Default.GetBytes(key);
return Convert.ToBase64String(Encrypt(buff,kb)); 
}
///<summary>
/// 使用给定密钥字符串解密string
///</summary>
///<param name="original">密文</param>
///<param name="key">密钥</param>
///<returns>明文</returns>
publicstaticstring Decrypt(string original, string key)
{
return Decrypt(original,key,System.Text.Encoding.Default);
}

///<summary>
/// 使用给定密钥字符串解密string,返回指定编码方式明文
///</summary>
///<param name="encrypted">密文</param>
///<param name="key">密钥</param>
///<param name="encoding">字符编码方案</param>
///<returns>明文</returns>
publicstaticstring Decrypt(string encrypted, string key,Encoding encoding) 
{ 
byte[] buff = Convert.FromBase64String(encrypted); 
byte[] kb = System.Text.Encoding.Default.GetBytes(key);
return encoding.GetString(Decrypt(buff,kb)); 
} 
#endregion

#region 使用 缺省密钥字符串 加密/解密/byte[]
///<summary>
/// 使用缺省密钥字符串解密byte[]
///</summary>
///<param name="encrypted">密文</param>
///<param name="key">密钥</param>
///<returns>明文</returns>
publicstaticbyte[] Decrypt(byte[] encrypted) 
{ 
byte[] key = System.Text.Encoding.Default.GetBytes("MATICSOFT"); 
return Decrypt(encrypted,key); 
}
///<summary>
/// 使用缺省密钥字符串加密
///</summary>
///<param name="original">原始数据</param>
///<param name="key">密钥</param>
///<returns>密文</returns>
publicstaticbyte[] Encrypt(byte[] original) 
{ 
byte[] key = System.Text.Encoding.Default.GetBytes("MATICSOFT"); 
return Encrypt(original,key); 
} 
#endregion

#region 使用 给定密钥 加密/解密/byte[]

///<summary>
/// 生成MD5摘要
///</summary>
///<param name="original">数据源</param>
///<returns>摘要</returns>
publicstaticbyte[] MakeMD5(byte[] original)
{
MD5CryptoServiceProvider hashmd5 =new MD5CryptoServiceProvider(); 
byte[] keyhash = hashmd5.ComputeHash(original); 
hashmd5 =null; 
return keyhash;
}


///<summary>
/// 使用给定密钥加密
///</summary>
///<param name="original">明文</param>
///<param name="key">密钥</param>
///<returns>密文</returns>
publicstaticbyte[] Encrypt(byte[] original, byte[] key) 
{ 
TripleDESCryptoServiceProvider des =new TripleDESCryptoServiceProvider(); 
des.Key = MakeMD5(key);
des.Mode = CipherMode.ECB; 

return des.CreateEncryptor().TransformFinalBlock(original, 0, original.Length); 
} 

///<summary>
/// 使用给定密钥解密数据
///</summary>
///<param name="encrypted">密文</param>
///<param name="key">密钥</param>
///<returns>明文</returns>
publicstaticbyte[] Decrypt(byte[] encrypted, byte[] key) 
{ 
TripleDESCryptoServiceProvider des =new TripleDESCryptoServiceProvider(); 
des.Key = MakeMD5(key); 
des.Mode = CipherMode.ECB; 

return des.CreateDecryptor().TransformFinalBlock(encrypted, 0, encrypted.Length);
} 

#endregion




}
}

using System;
using System.Security.Cryptography; 
using System.Text;
namespace BeidouWY.Common.DEncrypt
{
///<summary>
/// DES加密/解密类。
/// LiTianPing
///</summary>
publicclass DESEncrypt
{
public DESEncrypt()
{ 
}

#region ========加密======== 

///<summary>
/// 加密
///</summary>
///<param name="Text"></param>
///<returns></returns>
publicstaticstring Encrypt(string Text) 
{
return Encrypt(Text,"MATICSOFT");
}
///<summary> 
/// 加密数据 
///</summary> 
///<param name="Text"></param> 
///<param name="sKey"></param> 
///<returns></returns>
publicstaticstring Encrypt(string Text,string sKey) 
{ 
DESCryptoServiceProvider des =new DESCryptoServiceProvider(); 
byte[] inputByteArray; 
inputByteArray=Encoding.Default.GetBytes(Text); 
des.Key = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8)); 
des.IV = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8)); 
System.IO.MemoryStream ms=new System.IO.MemoryStream(); 
CryptoStream cs=new CryptoStream(ms,des.CreateEncryptor(),CryptoStreamMode.Write); 
cs.Write(inputByteArray,0,inputByteArray.Length); 
cs.FlushFinalBlock(); 
StringBuilder ret=new StringBuilder(); 
foreach( byte b in ms.ToArray()) 
{ 
ret.AppendFormat("{0:X2}",b); 
} 
return ret.ToString(); 
} 

#endregion

#region ========解密======== 


///<summary>
/// 解密
///</summary>
///<param name="Text"></param>
///<returns></returns>
publicstaticstring Decrypt(string Text) 
{
return Decrypt(Text,"MATICSOFT");
}
///<summary> 
/// 解密数据 
///</summary> 
///<param name="Text"></param> 
///<param name="sKey"></param> 
///<returns></returns>
publicstaticstring Decrypt(string Text,string sKey) 
{ 
DESCryptoServiceProvider des =new DESCryptoServiceProvider(); 
int len; 
len=Text.Length/2; 
byte[] inputByteArray =newbyte[len]; 
int x,i; 
for(x=0;x<len;x++) 
{ 
i = Convert.ToInt32(Text.Substring(x *2, 2), 16); 
inputByteArray[x]=(byte)i; 
} 
des.Key = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8)); 
des.IV = ASCIIEncoding.ASCII.GetBytes(System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(sKey, "md5").Substring(0, 8)); 
System.IO.MemoryStream ms=new System.IO.MemoryStream(); 
CryptoStream cs=new CryptoStream(ms,des.CreateDecryptor(),CryptoStreamMode.Write); 
cs.Write(inputByteArray,0,inputByteArray.Length); 
cs.FlushFinalBlock(); 
return Encoding.Default.GetString(ms.ToArray()); 
} 

#endregion


}
}

using System;
using System.Text;
using System.Security.Cryptography;
namespace BeidouWY.Common.DEncrypt
{
///<summary>
/// 得到随机安全码（哈希加密）。
///</summary>
publicclass HashEncode
{
public HashEncode()
{
//
// TODO: 在此处添加构造函数逻辑
//
}
///<summary>
/// 得到随机哈希加密字符串
///</summary>
///<returns></returns>
publicstaticstring GetSecurity()
{ 
string Security = HashEncoding(GetRandomValue()); 
return Security;
}
///<summary>
/// 得到一个随机数值
///</summary>
///<returns></returns>
publicstaticstring GetRandomValue()
{ 
Random Seed =new Random();
string RandomVaule = Seed.Next(1, int.MaxValue).ToString();
return RandomVaule;
}
///<summary>
/// 哈希加密一个字符串
///</summary>
///<param name="Security"></param>
///<returns></returns>
publicstaticstring HashEncoding(string Security)
{ 
byte[] Value;
UnicodeEncoding Code =new UnicodeEncoding();
byte[] Message = Code.GetBytes(Security);
SHA512Managed Arithmetic =new SHA512Managed();
Value = Arithmetic.ComputeHash(Message);
Security ="";
foreach(byte o in Value)
{
Security += (int) o +"O";
}
return Security;
}
}
}

using System;
using System.Security;
using System.Security.Cryptography;
using System.Text;

namespace BeidouWY.Common.DEncrypt
{
///<summary>
/// MD5Helper 的摘要说明。
///</summary>
publicclass MD5Helper
{
///<summary>
/// 得到一个加密的字符串
///</summary>
///<param name="strIn">原始字符串</param>
///<returns>加密后字符串</returns>
publicstaticstring GetMD5String(string strIn)
{
byte[] b=Encoding.Default.GetBytes(strIn);

b=new MD5CryptoServiceProvider().ComputeHash(b);
string strOut="";
for(int i=0;i<b.Length;i++)
{
strOut+=b[i].ToString("x").PadLeft(2,'2');
}
return strOut;
}
}
}