Quick Start: Encrypting a PDF document with a certificate using the web service API

The following C# code example encrypts a PDF document named Loan.pdf with a certificate named Encryption.cer. The encrypted PDF document is saved as a PDF file named EncryptLoanCert.pdf. (See Encrypting PDF Documents with Certificates.)

/*

 * Ensure that you create a .NET client assembly that uses 

 * base64 encoding. This is required to populate a BLOB 

 * object with data or retrieve data from a BLOB object.

 * 

 * For information, see "Invoking LiveCycle ES using Base64 Encoding" 

 * in Programming with LiveCycle ES

 */

using System;

using System.Collections;

using System.ComponentModel;

using System.Data;

using System.IO ;

namespace PKIEncryptPDF

{

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

		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 Recipient object to store certificate information

		Recipient recipient = new Recipient();

		//Create a BLOB object to store certificate information 

		BLOB cert = new BLOB();

		//Specify the location of the certificate

		string certPath = "C:\\Adobe\\Encryption.cer";

		FileStream fsCert = new FileStream(certPath, FileMode.Open);

		//Get the length of the file stream 

		int lenCert = (int)fsCert.Length; 

		byte[] cerByteArray=new byte[lenCert];

		//Populate the byte array with the contents of the FileStream object

		fsCert.Read(cerByteArray, 0, lenCert);

		cert.binaryData = cerByteArray; 

		//Assign the certificate to the Recipient object

		recipient.x509Cert=cert;

		//Create a CertificateEncryptionIdentity object

		CertificateEncryptionIdentity encryptionId = new CertificateEncryptionIdentity(); 

		encryptionId.recipient = recipient;

		//Create an Object array that is passed to the encryptPDFUsingCertificates method

		Object[] cerInfo = new Object[1];

		cerInfo[0] = encryptionId;

		//Create a CertificateEncryptionOptionSpec

		//object that stores encryption run-time values

		CertificateEncryptionOptionSpec pkiSpec = new CertificateEncryptionOptionSpec();

		//Specify the PDF document resource to encrypt

		pkiSpec.option=CertificateEncryptionOption.ALL;

		//Specify the Acrobat version

		pkiSpec.compat=CertificateEncryptionCompatibility.ACRO_7;

		//Encrypt the PDF document with a certificate

		BLOB outDoc = encryptionClient.encryptPDFUsingCertificates(inDoc,cerInfo,pkiSpec); 

		//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\\EncryptLoanCert.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);  

		}

	}

 }

}

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