org.apache.fop.pdf
Class PDFEncryptionJCE

java.lang.Object
  org.apache.fop.pdf.PDFObject
      org.apache.fop.pdf.PDFEncryptionJCE

All Implemented Interfaces:

PDFEncryption, PDFWritable

public final class PDFEncryptionJCE
extends PDFObject
implements PDFEncryption

An implementation of the Standard Security Handler.

Field Summary

Fields inherited from class org.apache.fop.pdf.PDFObject

log

Method Summary

void	applyFilter(AbstractPDFStream stream) Adds a PDFFilter to the PDFStream object
byte[]	encrypt(byte[] data, PDFObject refObj) Encrypt an array of bytes using a reference PDFObject for calculating the encryption key.
java.lang.String	getTrailerEntry() Returns the /Encrypt entry in the file trailer dictionary.
static PDFEncryption	make(int objectNumber, PDFEncryptionParams params, PDFDocument pdf) Creates and returns an encryption object.
byte[]	toPDF() Prepares the encryption dictionary for output to a PDF file.

Methods inherited from class org.apache.fop.pdf.PDFObject

contentEquals, encode, encodeBinaryToHexString, encodeString, encodeText, formatObject, getDocument, getDocumentSafely, getGeneration, getObjectID, getObjectNumber, getParent, hasObjectNumber, makeReference, output, outputInline, referencePDF, setDocument, setObjectNumber, setParent, toPDFString

Methods inherited from class java.lang.Object

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

Method Detail

make

public static PDFEncryption make(int objectNumber,
                                 PDFEncryptionParams params,
                                 PDFDocument pdf)

Creates and returns an encryption object.

Parameters:

objectNumber - the object number for the encryption dictionary

params - the encryption parameters

pdf - the PDF document to be encrypted

Returns:

the newly created encryption object

encrypt

public byte[] encrypt(byte[] data,
                      PDFObject refObj)

Encrypt an array of bytes using a reference PDFObject for calculating the encryption key.

Specified by:

encrypt in interface PDFEncryption

Parameters:

data - data to encrypt

refObj - reference PDFObject

Returns:

byte[] the encrypted data

applyFilter

public void applyFilter(AbstractPDFStream stream)

Adds a PDFFilter to the PDFStream object

Specified by:

applyFilter in interface PDFEncryption

Parameters:

stream - the stream to add an encryption filter to

toPDF

public byte[] toPDF()

Prepares the encryption dictionary for output to a PDF file.

Overrides:

toPDF in class PDFObject

Returns:

the encryption dictionary as a byte array

getTrailerEntry

public java.lang.String getTrailerEntry()

Returns the /Encrypt entry in the file trailer dictionary.

Specified by:

getTrailerEntry in interface PDFEncryption

Returns:

the string "/Encrypt n g R\n" where n and g are the number and generation of the document's encryption dictionary