使用RSA公钥加密文本文件

Question

我被赋予了一个公钥（key.pub文件），并且使用相同的名称，我想使用我的C＃应用程序对XML文件进行加密。

文件的结构如下：

----- BEGIN公钥-----

xxxxxxxxxxxxxxxxxxxxyyyyyyyyyyyyyyyyyyyxxxxxxxxxxxxxxxxxxxxxxxxxaaaaaaaaaaaaaaabbbbbbbbbbbbbbbbzzzzzzzzzzzzzzzzbbbbbbbbbbbbbbbbbbbbbbyyyyyyyyyyyyyyyyyyyyzzzzzzzzzzzzzzzzzzuuuuuuuuuuuuuuuuaaaaaaauuupppppppppppppppppaao ==

----- END PUBLIC KEY -----

Answer 1

public  string Encryption(string strText)
{ 
  var publicKey = "XXXXXXXXXXXXX The Key Value XXXXXXXXXXXXX";
  var testData = Encoding.UTF8.GetBytes(strText);
  RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(1024);

  // client encrypting data with a public key issued by server                    
    rsa.FromXmlString(publicKey.ToString());

   var encryptedData = rsa.Encrypt(testData, true);

   var base64Encrypted = Convert.ToBase64String(encryptedData);

    string retval = base64Encrypted.ToString();

    if (HaxVal1.Equals(HaxVal))
    {
        return retval;
    }
    else
    {
        return "InvalidSignature";
    }
}