rsa 解密解决方案

rsa 解密

C# code

protected void Button1_Click(object sender, EventArgs e)    {         using (RSACryptoServiceProvider rsa = new RSACryptoServiceProvider())         {                          // 公钥                         string pubkey = rsa.ToXmlString(false);                 txtPublic.Text = pubkey;                       // 私钥                          string prikey = rsa.ToXmlString(true);                         txtPrivate.Text = prikey;         }         }    /// <summary>    /// 加密    /// </summary>    /// <param name="sender"></param>    /// <param name="e"></param>    protected void Button2_Click(object sender, EventArgs e)    {        string prikey = txtPrivate.Text;                 using (RSACryptoServiceProvider rsa = new RSACryptoServiceProvider())                 { rsa.FromXmlString(prikey);             // 加密对象                     RSAPKCS1SignatureFormatter f = new RSAPKCS1SignatureFormatter(rsa);                         f.SetHashAlgorithm("SHA1");                         byte[] source = System.Text.ASCIIEncoding.ASCII.GetBytes(sUserName.Text);                         SHA1Managed sha = new SHA1Managed();                         byte[] result = sha.ComputeHash(source);                        byte[] b = f.CreateSignature(result);            sCode.Text = Convert.ToBase64String(b);        }     }    /// <summary>    /// 验证注册码    /// </summary>    /// <param name="sender"></param>    /// <param name="e"></param>    protected void Button3_Click(object sender, EventArgs e)    {        string pubkey = txtPublic.Text;                using (RSACryptoServiceProvider rsa = new RSACryptoServiceProvider())                {             rsa.FromXmlString(pubkey);                       RSAPKCS1SignatureDeformatter f = new RSAPKCS1SignatureDeformatter(rsa);                         f.SetHashAlgorithm("SHA1");                        byte[] key = Convert.FromBase64String(cCode.Text);                         SHA1Managed sha = new SHA1Managed();                        byte[] name = sha.ComputeHash(ASCIIEncoding.ASCII.GetBytes(cUserName.Text));                         if (f.VerifySignature(name, key))                                 msg.Text = "验证成功";                         else   msg.Text = "不成功";               }         }     }