com.lowagie.text.pdf

Class PdfEncryptor

public class PdfEncryptor extends Object

This class takes any PDF and returns exactly the same but encrypted. All the content, links, outlines, etc, are kept. It is also possible to change the info dictionary.
Constructor Summary
PdfEncryptor()
Method Summary
static voidencrypt(PdfReader reader, OutputStream os, byte[] userPassword, byte[] ownerPassword, int permissions, boolean strength128Bits)
Entry point to encrypt a PDF document.
static voidencrypt(PdfReader reader, OutputStream os, byte[] userPassword, byte[] ownerPassword, int permissions, boolean strength128Bits, HashMap newInfo)
Entry point to encrypt a PDF document.
static voidencrypt(PdfReader reader, OutputStream os, boolean strength, String userPassword, String ownerPassword, int permissions)
Entry point to encrypt a PDF document.
static voidencrypt(PdfReader reader, OutputStream os, boolean strength, String userPassword, String ownerPassword, int permissions, HashMap newInfo)
Entry point to encrypt a PDF document.
static voidencrypt(PdfReader reader, OutputStream os, int type, String userPassword, String ownerPassword, int permissions, HashMap newInfo)
Entry point to encrypt a PDF document.
static voidencrypt(PdfReader reader, OutputStream os, int type, String userPassword, String ownerPassword, int permissions)
Entry point to encrypt a PDF document.
static StringgetPermissionsVerbose(int permissions)
Give you a verbose analysis of the permissions.

Constructor Detail

PdfEncryptor

private PdfEncryptor()

Method Detail

encrypt

public static void encrypt(PdfReader reader, OutputStream os, byte[] userPassword, byte[] ownerPassword, int permissions, boolean strength128Bits)
Entry point to encrypt a PDF document. The encryption parameters are the same as in PdfWriter. The userPassword and the ownerPassword can be null or have zero length. In this case the ownerPassword is replaced by a random string. The open permissions for the document can be AllowPrinting, AllowModifyContents, AllowCopy, AllowModifyAnnotations, AllowFillIn, AllowScreenReaders, AllowAssembly and AllowDegradedPrinting. The permissions can be combined by ORing them.

Parameters: reader the read PDF os the output destination userPassword the user password. Can be null or empty ownerPassword the owner password. Can be null or empty permissions the user permissions strength128Bits true for 128 bit key length, false for 40 bit key length

Throws: DocumentException on error IOException on error

encrypt

public static void encrypt(PdfReader reader, OutputStream os, byte[] userPassword, byte[] ownerPassword, int permissions, boolean strength128Bits, HashMap newInfo)
Entry point to encrypt a PDF document. The encryption parameters are the same as in PdfWriter. The userPassword and the ownerPassword can be null or have zero length. In this case the ownerPassword is replaced by a random string. The open permissions for the document can be AllowPrinting, AllowModifyContents, AllowCopy, AllowModifyAnnotations, AllowFillIn, AllowScreenReaders, AllowAssembly and AllowDegradedPrinting. The permissions can be combined by ORing them.

Parameters: reader the read PDF os the output destination userPassword the user password. Can be null or empty ownerPassword the owner password. Can be null or empty permissions the user permissions strength128Bits true for 128 bit key length, false for 40 bit key length newInfo an optional String map to add or change the info dictionary. Entries with null values delete the key in the original info dictionary

Throws: DocumentException on error IOException on error

encrypt

public static void encrypt(PdfReader reader, OutputStream os, boolean strength, String userPassword, String ownerPassword, int permissions)
Entry point to encrypt a PDF document. The encryption parameters are the same as in PdfWriter. The userPassword and the ownerPassword can be null or have zero length. In this case the ownerPassword is replaced by a random string. The open permissions for the document can be AllowPrinting, AllowModifyContents, AllowCopy, AllowModifyAnnotations, AllowFillIn, AllowScreenReaders, AllowAssembly and AllowDegradedPrinting. The permissions can be combined by ORing them.

Parameters: reader the read PDF os the output destination strength true for 128 bit key length, false for 40 bit key length userPassword the user password. Can be null or empty ownerPassword the owner password. Can be null or empty permissions the user permissions

Throws: DocumentException on error IOException on error

encrypt

public static void encrypt(PdfReader reader, OutputStream os, boolean strength, String userPassword, String ownerPassword, int permissions, HashMap newInfo)
Entry point to encrypt a PDF document. The encryption parameters are the same as in PdfWriter. The userPassword and the ownerPassword can be null or have zero length. In this case the ownerPassword is replaced by a random string. The open permissions for the document can be AllowPrinting, AllowModifyContents, AllowCopy, AllowModifyAnnotations, AllowFillIn, AllowScreenReaders, AllowAssembly and AllowDegradedPrinting. The permissions can be combined by ORing them.

Parameters: reader the read PDF os the output destination strength true for 128 bit key length, false for 40 bit key length userPassword the user password. Can be null or empty ownerPassword the owner password. Can be null or empty permissions the user permissions newInfo an optional String map to add or change the info dictionary. Entries with null values delete the key in the original info dictionary

Throws: DocumentException on error IOException on error

encrypt

public static void encrypt(PdfReader reader, OutputStream os, int type, String userPassword, String ownerPassword, int permissions, HashMap newInfo)
Entry point to encrypt a PDF document. The encryption parameters are the same as in PdfWriter. The userPassword and the ownerPassword can be null or have zero length. In this case the ownerPassword is replaced by a random string. The open permissions for the document can be AllowPrinting, AllowModifyContents, AllowCopy, AllowModifyAnnotations, AllowFillIn, AllowScreenReaders, AllowAssembly and AllowDegradedPrinting. The permissions can be combined by ORing them.

Parameters: reader the read PDF os the output destination type the type of encryption. It can be one of STANDARD_ENCRYPTION_40, STANDARD_ENCRYPTION_128 or ENCRYPTION_AES128. Optionally DO_NOT_ENCRYPT_METADATA can be ored to output the metadata in cleartext userPassword the user password. Can be null or empty ownerPassword the owner password. Can be null or empty permissions the user permissions newInfo an optional String map to add or change the info dictionary. Entries with null values delete the key in the original info dictionary

Throws: DocumentException on error IOException on error

encrypt

public static void encrypt(PdfReader reader, OutputStream os, int type, String userPassword, String ownerPassword, int permissions)
Entry point to encrypt a PDF document. The encryption parameters are the same as in PdfWriter. The userPassword and the ownerPassword can be null or have zero length. In this case the ownerPassword is replaced by a random string. The open permissions for the document can be AllowPrinting, AllowModifyContents, AllowCopy, AllowModifyAnnotations, AllowFillIn, AllowScreenReaders, AllowAssembly and AllowDegradedPrinting. The permissions can be combined by ORing them.

Parameters: reader the read PDF os the output destination type the type of encryption. It can be one of STANDARD_ENCRYPTION_40, STANDARD_ENCRYPTION_128 or ENCRYPTION_AES128. Optionally DO_NOT_ENCRYPT_METADATA can be ored to output the metadata in cleartext userPassword the user password. Can be null or empty ownerPassword the owner password. Can be null or empty permissions the user permissions values delete the key in the original info dictionary

Throws: DocumentException on error IOException on error

getPermissionsVerbose

public static String getPermissionsVerbose(int permissions)
Give you a verbose analysis of the permissions.

Parameters: permissions the permissions value of a PDF file

Returns: a String that explains the meaning of the permissions value