org.apache.pdfbox.pdmodel.encryption

Class PublicKeyDecryptionMaterial

java.lang.Object

org.apache.pdfbox.pdmodel.encryption.DecryptionMaterial

org.apache.pdfbox.pdmodel.encryption.PublicKeyDecryptionMaterial

public class PublicKeyDecryptionMaterial
extends DecryptionMaterial

This class holds necessary information to decrypt a PDF document protected by the public key security handler. To decrypt such a document, we need:

• a valid X509 certificate which correspond to one of the recipient of the document
• the private key corresponding to this certificate
• the password to decrypt the private key if necessary

Objects of this class can be used with the openProtection method of PDDocument. The following example shows how to decrypt a document using a PKCS#12 certificate (typically files with a pfx extension).

 PDDocument doc = PDDocument.load(document_path);
 KeyStore ks = KeyStore.getInstance("PKCS12");
 ks.load(new FileInputStream(certificate_path), password.toCharArray());
 PublicKeyDecryptionMaterial dm = new PublicKeyDecryptionMaterial(ks, null, password);
 doc.openProtection(dm);
 

In this code sample certificate_path contains the path to the PKCS#12 certificate.

Version:

$Revision: 1.2 $

Author:

Benoit Guillon (benoit.guillon@snv.jussieu.fr)

See Also:

PDDocument.openProtection(DecryptionMaterial)

Constructor Summary

Constructors

Constructor and Description
PublicKeyDecryptionMaterial(java.security.KeyStore keystore, java.lang.String a, java.lang.String pwd) Create a new public key decryption material.

Method Summary

Methods

Modifier and Type	Method and Description
java.security.cert.X509Certificate	getCertificate() Returns the certificate contained in the keystore.
java.lang.String	getPassword() Returns the password given by the user and that will be used to open the private key.
java.security.Key	getPrivateKey() returns The private key that will be used to open the document protection.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

PublicKeyDecryptionMaterial

public PublicKeyDecryptionMaterial(java.security.KeyStore keystore,
                           java.lang.String a,
                           java.lang.String pwd)

Create a new public key decryption material.

Parameters:

keystore - The keystore were the private key and the certificate are

a - The alias of the private key and the certificate. If the keystore contains only 1 entry, this parameter can be left null.

pwd - The password to extract the private key from the keystore.

Method Detail

getCertificate

public java.security.cert.X509Certificate getCertificate()
                                                  throws java.security.KeyStoreException

Returns the certificate contained in the keystore.

Returns:

The certificate that will be used to try to open the document.

Throws:

java.security.KeyStoreException - If there is an error accessing the certificate.

getPassword

public java.lang.String getPassword()

Returns the password given by the user and that will be used to open the private key.

Returns:

The password.

getPrivateKey

public java.security.Key getPrivateKey()
                                throws java.security.KeyStoreException

returns The private key that will be used to open the document protection.

Returns:

The private key.

Throws:

java.security.KeyStoreException - If there is an error accessing the key.