.net常用加密解密方法

private byte[] _power;
/// <summary>
/// 用户权限
/// </summary>
public byte[] 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>
public class 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>
public static string 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>
public static string 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>
public static string 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>
public static string 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>
public static string 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>
public static byte[] 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>
public static byte[] 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>
public static byte[] 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>
public static byte[] 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>
public static byte[] 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>
public class DESEncrypt
{
public DESEncrypt()
{
}

#region ========加密========

/// <summary>
/// 加密
/// </summary>
/// <param name="Text"></param>
/// <returns></returns>
public static string Encrypt(string Text)
{
return Encrypt(Text,"MATICSOFT");
}
/// <summary>
/// 加密数据
/// </summary>
/// <param name="Text"></param>
/// <param name="sKey"></param>
/// <returns></returns>
public static string 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>
public static string Decrypt(string Text)
{
return Decrypt(Text,"MATICSOFT");
}
/// <summary>
/// 解密数据
/// </summary>
/// <param name="Text"></param>
/// <param name="sKey"></param>
/// <returns></returns>
public static string Decrypt(string Text,string sKey)
{
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
int len;
len=Text.Length/2;
byte[] inputByteArray = new byte[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>
public class 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>
public static string GetSecurity()
{
string Security = HashEncoding(GetRandomValue());
return Security;
}
/// <summary>
/// 得到一个随机数值
/// </summary>
/// <returns></returns>
public static string 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>
public static string 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>
public class 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>
public static string 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;
}
}
}

using System;
using System.Text;
using System.Security.Cryptography;
namespace BeidouWY.Common.DEncrypt
{
/// <summary>
/// RSA加密解密及RSA签名和验证
/// </summary>
public class RSACryption
{
public RSACryption()
{
}

#region RSA 加密解密

#region RSA 的密钥产生

/// <summary>
/// RSA 的密钥产生 产生私钥 和公钥
/// </summary>
/// <param name="xmlKeys"></param>
/// <param name="xmlPublicKey"></param>
public void RSAKey(out string xmlKeys,out string xmlPublicKey)
{
System.Security.Cryptography.RSACryptoServiceProvider rsa=new RSACryptoServiceProvider();
xmlKeys=rsa.ToXmlString(true);
xmlPublicKey = rsa.ToXmlString(false);
}
#endregion

#region RSA的加密函数
//##############################################################################
//RSA 方式加密
//说明KEY必须是XML的行式,返回的是字符串
//在有一点需要说明！！该加密方式有 长度 限制的！！
//##############################################################################

//RSA的加密函数  string
public string RSAEncrypt(string xmlPublicKey,string m_strEncryptString )
{

byte[] PlainTextBArray;
byte[] CypherTextBArray;
string Result;
RSACryptoServiceProvider rsa=new RSACryptoServiceProvider();
rsa.FromXmlString(xmlPublicKey);
PlainTextBArray = (new UnicodeEncoding()).GetBytes(m_strEncryptString);
CypherTextBArray = rsa.Encrypt(PlainTextBArray, false);
Result=Convert.ToBase64String(CypherTextBArray);
return Result;

}
//RSA的加密函数 byte[]
public string RSAEncrypt(string xmlPublicKey,byte[] EncryptString )
{

byte[] CypherTextBArray;
string Result;
RSACryptoServiceProvider rsa=new RSACryptoServiceProvider();
rsa.FromXmlString(xmlPublicKey);
CypherTextBArray = rsa.Encrypt(EncryptString, false);
Result=Convert.ToBase64String(CypherTextBArray);
return Result;

}
#endregion

#region RSA的解密函数
//RSA的解密函数  string
public string RSADecrypt(string xmlPrivateKey, string m_strDecryptString )
{
byte[] PlainTextBArray;
byte[] DypherTextBArray;
string Result;
System.Security.Cryptography.RSACryptoServiceProvider rsa=new RSACryptoServiceProvider();
rsa.FromXmlString(xmlPrivateKey);
PlainTextBArray =Convert.FromBase64String(m_strDecryptString);
DypherTextBArray=rsa.Decrypt(PlainTextBArray, false);
Result=(new UnicodeEncoding()).GetString(DypherTextBArray);
return Result;

}

//RSA的解密函数  byte
public string RSADecrypt(string xmlPrivateKey, byte[] DecryptString )
{
byte[] DypherTextBArray;
string Result;
System.Security.Cryptography.RSACryptoServiceProvider rsa=new RSACryptoServiceProvider();
rsa.FromXmlString(xmlPrivateKey);
DypherTextBArray=rsa.Decrypt(DecryptString, false);
Result=(new UnicodeEncoding()).GetString(DypherTextBArray);
return Result;

}
#endregion

#endregion

#region RSA数字签名

#region 获取Hash描述表
//获取Hash描述表
public bool GetHash(string m_strSource, ref byte[] HashData)
{
//从字符串中取得Hash描述
byte[] Buffer;
System.Security.Cryptography.HashAlgorithm MD5 = System.Security.Cryptography.HashAlgorithm.Create("MD5");
Buffer = System.Text.Encoding.GetEncoding("GB2312").GetBytes(m_strSource);
HashData = MD5.ComputeHash(Buffer);

return true;
}

//获取Hash描述表
public bool GetHash(string m_strSource, ref string strHashData)
{

//从字符串中取得Hash描述
byte[] Buffer;
byte[] HashData;
System.Security.Cryptography.HashAlgorithm MD5 = System.Security.Cryptography.HashAlgorithm.Create("MD5");
Buffer = System.Text.Encoding.GetEncoding("GB2312").GetBytes(m_strSource);
HashData = MD5.ComputeHash(Buffer);

strHashData = Convert.ToBase64String(HashData);
return true;

}

//获取Hash描述表
public bool GetHash(System.IO.FileStream objFile, ref byte[] HashData)
{

//从文件中取得Hash描述
System.Security.Cryptography.HashAlgorithm MD5 = System.Security.Cryptography.HashAlgorithm.Create("MD5");
HashData = MD5.ComputeHash(objFile);
objFile.Close();

return true;

}

//获取Hash描述表
public bool GetHash(System.IO.FileStream objFile, ref string strHashData)
{

//从文件中取得Hash描述
byte[] HashData;
System.Security.Cryptography.HashAlgorithm MD5 = System.Security.Cryptography.HashAlgorithm.Create("MD5");
HashData = MD5.ComputeHash(objFile);
objFile.Close();

strHashData = Convert.ToBase64String(HashData);

return true;

}
#endregion

#region RSA签名
//RSA签名
public bool SignatureFormatter(string p_strKeyPrivate, byte[] HashbyteSignature, ref byte[] EncryptedSignatureData)
{

System.Security.Cryptography.RSACryptoServiceProvider RSA = new System.Security.Cryptography.RSACryptoServiceProvider();

RSA.FromXmlString(p_strKeyPrivate);
System.Security.Cryptography.RSAPKCS1SignatureFormatter RSAFormatter = new System.Security.Cryptography.RSAPKCS1SignatureFormatter(RSA);
//设置签名的算法为MD5
RSAFormatter.SetHashAlgorithm("MD5");
//执行签名
EncryptedSignatureData = RSAFormatter.CreateSignature(HashbyteSignature);

return true;

}

//RSA签名
public bool SignatureFormatter(string p_strKeyPrivate, byte[] HashbyteSignature, ref string m_strEncryptedSignatureData)
{

byte[] EncryptedSignatureData;

System.Security.Cryptography.RSACryptoServiceProvider RSA = new System.Security.Cryptography.RSACryptoServiceProvider();

RSA.FromXmlString(p_strKeyPrivate);
System.Security.Cryptography.RSAPKCS1SignatureFormatter RSAFormatter = new System.Security.Cryptography.RSAPKCS1SignatureFormatter(RSA);
//设置签名的算法为MD5
RSAFormatter.SetHashAlgorithm("MD5");
//执行签名
EncryptedSignatureData = RSAFormatter.CreateSignature(HashbyteSignature);

m_strEncryptedSignatureData = Convert.ToBase64String(EncryptedSignatureData);

return true;

}

//RSA签名
public bool SignatureFormatter(string p_strKeyPrivate, string m_strHashbyteSignature, ref byte[] EncryptedSignatureData)
{

byte[] HashbyteSignature;

HashbyteSignature = Convert.FromBase64String(m_strHashbyteSignature);
System.Security.Cryptography.RSACryptoServiceProvider RSA = new System.Security.Cryptography.RSACryptoServiceProvider();

RSA.FromXmlString(p_strKeyPrivate);
System.Security.Cryptography.RSAPKCS1SignatureFormatter RSAFormatter = new System.Security.Cryptography.RSAPKCS1SignatureFormatter(RSA);
//设置签名的算法为MD5
RSAFormatter.SetHashAlgorithm("MD5");
//执行签名
EncryptedSignatureData = RSAFormatter.CreateSignature(HashbyteSignature);

return true;

}

//RSA签名
public bool SignatureFormatter(string p_strKeyPrivate, string m_strHashbyteSignature, ref string m_strEncryptedSignatureData)
{

byte[] HashbyteSignature;
byte[] EncryptedSignatureData;

HashbyteSignature = Convert.FromBase64String(m_strHashbyteSignature);
System.Security.Cryptography.RSACryptoServiceProvider RSA = new System.Security.Cryptography.RSACryptoServiceProvider();

RSA.FromXmlString(p_strKeyPrivate);
System.Security.Cryptography.RSAPKCS1SignatureFormatter RSAFormatter = new System.Security.Cryptography.RSAPKCS1SignatureFormatter(RSA);
//设置签名的算法为MD5
RSAFormatter.SetHashAlgorithm("MD5");
//执行签名
EncryptedSignatureData = RSAFormatter.CreateSignature(HashbyteSignature);

m_strEncryptedSignatureData = Convert.ToBase64String(EncryptedSignatureData);

return true;

}
#endregion

#region RSA 签名验证

public bool SignatureDeformatter(string p_strKeyPublic, byte[] HashbyteDeformatter, byte[] DeformatterData)
{

System.Security.Cryptography.RSACryptoServiceProvider RSA = new System.Security.Cryptography.RSACryptoServiceProvider();

RSA.FromXmlString(p_strKeyPublic);
System.Security.Cryptography.RSAPKCS1SignatureDeformatter RSADeformatter = new System.Security.Cryptography.RSAPKCS1SignatureDeformatter(RSA);
//指定解密的时候HASH算法为MD5
RSADeformatter.SetHashAlgorithm("MD5");

if(RSADeformatter.VerifySignature(HashbyteDeformatter,DeformatterData))
{
return true;
}
else
{
return false;
}

}

public bool SignatureDeformatter(string p_strKeyPublic, string p_strHashbyteDeformatter, byte[] DeformatterData)
{

byte[] HashbyteDeformatter;

HashbyteDeformatter = Convert.FromBase64String(p_strHashbyteDeformatter);

System.Security.Cryptography.RSACryptoServiceProvider RSA = new System.Security.Cryptography.RSACryptoServiceProvider();

RSA.FromXmlString(p_strKeyPublic);
System.Security.Cryptography.RSAPKCS1SignatureDeformatter RSADeformatter = new System.Security.Cryptography.RSAPKCS1SignatureDeformatter(RSA);
//指定解密的时候HASH算法为MD5
RSADeformatter.SetHashAlgorithm("MD5");

if(RSADeformatter.VerifySignature(HashbyteDeformatter,DeformatterData))
{
return true;
}
else
{
return false;
}

}

public bool SignatureDeformatter(string p_strKeyPublic, byte[] HashbyteDeformatter, string p_strDeformatterData)
{

byte[] DeformatterData;

System.Security.Cryptography.RSACryptoServiceProvider RSA = new System.Security.Cryptography.RSACryptoServiceProvider();

RSA.FromXmlString(p_strKeyPublic);
System.Security.Cryptography.RSAPKCS1SignatureDeformatter RSADeformatter = new System.Security.Cryptography.RSAPKCS1SignatureDeformatter(RSA);
//指定解密的时候HASH算法为MD5
RSADeformatter.SetHashAlgorithm("MD5");

DeformatterData =Convert.FromBase64String(p_strDeformatterData);

if(RSADeformatter.VerifySignature(HashbyteDeformatter,DeformatterData))
{
return true;
}
else
{
return false;
}

}

public bool SignatureDeformatter(string p_strKeyPublic, string p_strHashbyteDeformatter, string p_strDeformatterData)
{

byte[] DeformatterData;
byte[] HashbyteDeformatter;

HashbyteDeformatter = Convert.FromBase64String(p_strHashbyteDeformatter);
System.Security.Cryptography.RSACryptoServiceProvider RSA = new System.Security.Cryptography.RSACryptoServiceProvider();

RSA.FromXmlString(p_strKeyPublic);
System.Security.Cryptography.RSAPKCS1SignatureDeformatter RSADeformatter = new System.Security.Cryptography.RSAPKCS1SignatureDeformatter(RSA);
//指定解密的时候HASH算法为MD5
RSADeformatter.SetHashAlgorithm("MD5");

DeformatterData =Convert.FromBase64String(p_strDeformatterData);

if(RSADeformatter.VerifySignature(HashbyteDeformatter,DeformatterData))
{
return true;
}
else
{
return false;
}

}

#endregion

#endregion

}
}