RSA非对称加密解密的问题，不能获得明文！！！！

2012-09-03 10:13:57 285 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

Java非对称加密：RSA 数据加密与解密、数字签名与验签非对称加密（asymmetric cryptography），也称为公开密钥加密（public-key cryptography），是密码学中的一种重要算法。非对称加密使用一对密钥进行加密和解密操作，这两个密钥分别是公开密钥（public key）和私有密钥（private key）。公开密钥可以公开给任何人使用，而私有密钥则必须保密，只有密钥的持有者才能访问。这两个密钥之间存在数学上的联系，但不能从一个推导出另一个。阅读详情

我用大数算法解密后得不到明文，请教大虾们！！！！

环境：VS2010，NET4.0
引用：using System.Security.Cryptography;
using System.Numerics;



 public partial class FormRsaEncrypt : Form

    {

        public FormRsaEncrypt()

        {

            InitializeComponent();

            this.Text = "RSA 加密解密";



            textBoxEncrypt.ReadOnly = true;

            textBoxDecrypt.ReadOnly = true;



            RSACryptoServiceProvider RSA = new RSACryptoServiceProvider();

            this.txbPrivateKey.Text = RSA.ToXmlString(true);

            this.txbPublicKey.Text = RSA.ToXmlString(false);

            RSA.Clear();

        }



        private void buttonOK_Click(object sender, EventArgs e)

        {

            //int TextLength = 128;

            byte[] encryptedData;

            byte[] decryptedData;



            try

            {

                RSACryptoServiceProvider RSA1 = new RSACryptoServiceProvider();

                RSA1.FromXmlString(this.txbPrivateKey.Text);

                RSAParameters RSAKeyInfo = RSA1.ExportParameters(true);



                //byte[] dataToEncrypt = GenerateBytes(TextLength);

                byte[] dataToEncrypt = Encoding.UTF8.GetBytes(this.textBoxInput.Text);



                encryptedData = RSAEncrypt(dataToEncrypt, RSAKeyInfo.Exponent, RSAKeyInfo.Modulus);

                int x = encryptedData.Length;

                this.textBoxEncrypt.Text = Convert.ToBase64String(encryptedData);



                decryptedData = RSADecrypt(encryptedData, RSAKeyInfo.D, RSAKeyInfo.Modulus);

                int y = decryptedData.Length;

                this.textBoxDecrypt.Text = Convert.ToBase64String(decryptedData);

            }

            catch (Exception ex)

            {

                MessageBox.Show(ex.Message);

            }

        }



        //***********************************************************************

        // RSA Encrypt

        //***********************************************************************

        static public byte[] RSAEncrypt(byte[] dataToEncrypt, byte[] Exponent, byte[] Modulus)

        {

            BigInteger original = new BigInteger(dataToEncrypt);

            BigInteger e = new BigInteger(Exponent);

            BigInteger n = new BigInteger(Modulus);



            BigInteger encrypted = BigInteger.ModPow(original, e, n);

            return encrypted.ToByteArray();

        }



        //***********************************************************************

        // RSA Decrypt

        //***********************************************************************

        static public byte[] RSADecrypt(byte[] encryptedData, byte[] D, byte[] Modulus)

        {

            BigInteger encrypted = new BigInteger(encryptedData);

            BigInteger d = new BigInteger(D);

            BigInteger n = new BigInteger(Modulus);



            BigInteger decrypted = BigInteger.ModPow(encrypted, d, n);



            return decrypted.ToByteArray();

        }

    }