[DEncrypt] RSACryption--RSA加密/解密字符串 （转载）

点击下载 RSACryption.zip

这个类是关于加密，解密的操作，文件的一些高级操作
1.RSACryption RSA 的密钥产生
2.RSACryption RSA的加密函数
3.RSACryption RSA的解密函数
4.RSACryption 获取Hash描述表 
5.RSACryption RSA签名 
6.RSACryption RSA签名认证
看下面代码吧

/// <summary>
/// 类说明：Assistant
/// 编 码 人：苏飞
/// 联系方式：361983679
/// 更新网站：[url=http://www.cckan.net/thread-655-1-1.html]http://www.cckan.net/thread-655-1-1.html[/url]
/// </summary>
using System;
using System.Text;
using System.Security.Cryptography;
namespace DotNet.Utilities
{
  /// <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 

  }
}