How can Encrypt a pdf file?

Question

Hi i am new in this forum... i am using visual studio framework 3.5 trying to do something with encrypting pdf file It is not successful for final view . I use Rijindael method in my situation . Do you have any method  ideas ? Could you give me suggestion? thanks in advance.

Munish Arora · Answer

Thanks Lalit. But I am not able to find PasswordEncryptionOptionSpec. Pls. provide me the path from where I can get the same.

benzema kirism · Answer

thank for your help.

Lalit M · Answer

you can encrypting a PDF file using the web service API show this C# code example encrypts a PDF file named Loan.pdf with a password value of OpenPassword. The master password is PermissionPassword. The secured PDF document is saved as a PDF file named EncryptLoan.pdf. using System; using System.Collections; using System.ComponentModel; using System.Data; using System.IO ; namespace PasswordEncryptPDF { class Class1 { [STAThread] static void Main(string[] args) { try { //Create an EncryptionServiceService client object EncryptionServiceService encryptionClient = new EncryptionServiceService(); encryptionClient.Credentials = new System.Net.NetworkCredential(administrator password); //Create a BLOB object to store the PDF document BLOB inDoc = new BLOB(); //Specify the PDF document to encrypt with a password string path = C:\Adobe\Loan.pdf; FileStream fs = new FileStream(path FileMode.Open); //Get the length of the file stream int len = (int)fs.Length; byte[] ByteArray=new byte[len]; //Populate the byte array with the contents of the FileStream object fs.Read(ByteArray 0 len); inDoc.binaryData = ByteArray; //Create a PasswordEncryptionOptionSpec //object that stores encryption run-time values PasswordEncryptionOptionSpec passSpec = new PasswordEncryptionOptionSpec(); //Specify the PDF document resource to encrypt passSpec.encryptOption=PasswordEncryptionOption.ALL; //Specify the Acrobat version passSpec.compatability = PasswordEncryptionCompatability.ACRO_7; //Specify the password values passSpec.documentOpenPassword = OpenPassword; passSpec.permissionPassword = PermissionPassword; //Encrypt the PDF document with a password BLOB outDoc = encryptionClient.encryptPDFUsingPassword(inDocpassSpec); //Populate a byte array with a BLOB data byte[] outByteArray=outDoc.binaryData; //Create a new file that represents the encrypted PDF document string FILE_NAME = C:\Adobe\EncryptLoan.pdf ; FileStream fs2 = new FileStream(FILE_NAME FileMode.OpenOrCreate); //Create a BinaryWriter object BinaryWriter w = new BinaryWriter(fs2); w.Write(outByteArray); w.Close(); fs2.Close(); } catch (Exception ee) { Console.WriteLine(ee.Message); } } } }