com.cete.dynamicpdf.io
Class Encrypter

java.lang.Object
  |
  +--com.cete.dynamicpdf.io.Encrypter

public class Encrypter

extends java.lang.Object

Represents an Encrypter class used for encryption of the document.

Constructor Summary

Encrypter(byte[] owner, byte[] user, byte[] key, int privileges)
Initializes a new instance of the Encrypter class.

Method Summary

void	draw(DocumentWriter writer) Draws the encrypter dictionary to the given DocumentWriter object.
void	encrypt(byte[] data, int objectNumber) Encrypts the data found in the data byte array.
void	encrypt(byte[] data, int dataLength, int objectNumber) Encrypts the data found in the data byte array.
byte[]	encryptToByte(byte[] data, int objectNumber) Encrypts the data found in the data byte array to a new byte array.
byte[]	encryptToByte(byte[] data, int start, int length, int objectNumber) Encrypts the data found in the data byte array to a new byte array.

Methods inherited from class java.lang.Object

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

Constructor Detail

Encrypter

public Encrypter(byte[] owner,
                 byte[] user,
                 byte[] key,
                 int privileges)

Initializes a new instance of the Encrypter class.

Parameters:

owner - byte array Encrypted owner password.

user - byte array Encrypted user password.

key - byte array Encryption key.

privileges - PDF value of privileges.

Method Detail

draw

public void draw(DocumentWriter writer)

Draws the encrypter dictionary to the given DocumentWriter object.

Parameters:

writer - the DocumentWriter object to receive the output.

See Also:

DocumentWriter

encrypt

public void encrypt(byte[] data,
                    int objectNumber)

Encrypts the data found in the data byte array. The data is encrypted in place and the array is modified.

Parameters:

data - byte[] Data to encrypt.

objectNumber - int object number of the PDF object containing the data.

encrypt

public void encrypt(byte[] data,
                    int dataLength,
                    int objectNumber)

Encrypts the data found in the data byte array. The data is encrypted in place and the array is modified.

Parameters:

data - byte[] Data to encrypt.

dataLength - int length of the data to encrypt.

objectNumber - int object number of the PDF object containing the data.

encryptToByte

public byte[] encryptToByte(byte[] data,
                            int objectNumber)

Encrypts the data found in the data byte array to a new byte array.

Parameters:

data - byte array containing data to encrypt.

objectNumber - int object number of the PDF object containing the data.

Returns:

A byte array containing the encrypted data.

encryptToByte

public byte[] encryptToByte(byte[] data,
                            int start,
                            int length,
                            int objectNumber)

Encrypts the data found in the data byte array to a new byte array.

Parameters:

data - byte array containing data to encrypt.

start - Start of the data to encrypt.

length - Length of the data to encrypt.

objectNumber - int object number of the PDF object containing the data.

Returns:

A byte array containing the encrypted data.