RSA加密解密和读取公钥、私钥

/// <summary>
   /// RSA加密解密及RSA签名和验证
   /// </summary>
   public class RSADE
   {
       public RSADE()
       {
       }

#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();

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();

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();

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();

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

               byte[] DeformatterData;

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

DeformatterData =Convert.FromBase64String(p_strDeformatterData);

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();

DeformatterData =Convert.FromBase64String(p_strDeformatterData);

#endregion

#region 获取加密解密证书
        /// <summary>
        /// 取得证书私钥
        /// </summary>
        /// <param name="pfxPath">证书的绝对路径</param>
        /// <param name="password">访问证书的密码</param>
        /// <returns></returns>
        public static String GetPrivateKey( string pfxPath, string password )
        {
            X509Certificate2 pfx = new X509Certificate2( pfxPath, password, X509KeyStorageFlags.Exportable );
            string privateKey = pfx.PrivateKey.ToXmlString( true );
            return privateKey;
        }

/// <summary>
        /// 取得证书的公钥
        /// </summary>
        /// <param name="cerPath">证书的绝对路径</param>
        /// <returns></returns>
        public static String GetPublicKey( string cerPath )
        {
            X509Certificate2 cer = new X509Certificate2( cerPath );
            string publicKey = cer.PublicKey.Key.ToXmlString( false );
            return publicKey;
        }
        #endregion
    }