com.lowagie.text.pdf

Class PdfEncryptor

java.lang.Object

com.lowagie.text.pdf.PdfEncryptor

public final 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.

Method Summary

Modifier and Type	Method and Description
static void	encrypt(PdfReader reader, OutputStream os, boolean strength, String userPassword, String ownerPassword, int permissions) Entry point to encrypt a PDF document.
static void	encrypt(PdfReader reader, OutputStream os, boolean strength, String userPassword, String ownerPassword, int permissions, Map<String,String> newInfo) Entry point to encrypt a PDF document.
static void	encrypt(PdfReader reader, OutputStream os, byte[] userPassword, byte[] ownerPassword, int permissions, boolean strength128Bits) Entry point to encrypt a PDF document.
static void	encrypt(PdfReader reader, OutputStream os, byte[] userPassword, byte[] ownerPassword, int permissions, boolean strength128Bits, Map<String,String> newInfo) Entry point to encrypt a PDF document.
static void	encrypt(PdfReader reader, OutputStream os, int type, String userPassword, String ownerPassword, int permissions) Entry point to encrypt a PDF document.
static void	encrypt(PdfReader reader, OutputStream os, int type, String userPassword, String ownerPassword, int permissions, Map<String,String> newInfo) Entry point to encrypt a PDF document.
static String	getPermissionsVerbose(int permissions) Give you a verbose analysis of the permissions.
static boolean	isAssemblyAllowed(int permissions) Tells you if document assembly is allowed.
static boolean	isCopyAllowed(int permissions) Tells you if copying is allowed.
static boolean	isDegradedPrintingAllowed(int permissions) Tells you if degraded printing is allowed.
static boolean	isFillInAllowed(int permissions) Tells you if filling in fields is allowed.
static boolean	isModifyAnnotationsAllowed(int permissions) Tells you if modifying annotations is allowed.
static boolean	isModifyContentsAllowed(int permissions) Tells you if modifying content is allowed.
static boolean	isPrintingAllowed(int permissions) Tells you if printing is allowed.
static boolean	isScreenReadersAllowed(int permissions) Tells you if repurposing for screenreaders is allowed.

Methods inherited from class java.lang.Object

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

Method Detail

encrypt

public static void encrypt(PdfReader reader,
                           OutputStream os,
                           byte[] userPassword,
                           byte[] ownerPassword,
                           int permissions,
                           boolean strength128Bits)
                    throws DocumentException,
                           IOException

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,
                           Map<String,String> newInfo)
                    throws DocumentException,
                           IOException

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)
                    throws DocumentException,
                           IOException

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,
                           Map<String,String> newInfo)
                    throws DocumentException,
                           IOException

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,
                           Map<String,String> newInfo)
                    throws DocumentException,
                           IOException

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)
                    throws DocumentException,
                           IOException

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

isPrintingAllowed

public static boolean isPrintingAllowed(int permissions)

Tells you if printing is allowed.

Parameters:

permissions - the permissions value of a PDF file

Returns:

true if printing is allowed

Since:

2.0.7

isModifyContentsAllowed

public static boolean isModifyContentsAllowed(int permissions)

Tells you if modifying content is allowed.

Parameters:

permissions - the permissions value of a PDF file

Returns:

true if modifying content is allowed

Since:

2.0.7

isCopyAllowed

public static boolean isCopyAllowed(int permissions)

Tells you if copying is allowed.

Parameters:

permissions - the permissions value of a PDF file

Returns:

true if copying is allowed

Since:

2.0.7

isModifyAnnotationsAllowed

public static boolean isModifyAnnotationsAllowed(int permissions)

Tells you if modifying annotations is allowed.

Parameters:

permissions - the permissions value of a PDF file

Returns:

true if modifying annotations is allowed

Since:

2.0.7

isFillInAllowed

public static boolean isFillInAllowed(int permissions)

Tells you if filling in fields is allowed.

Parameters:

permissions - the permissions value of a PDF file

Returns:

true if filling in fields is allowed

Since:

2.0.7

isScreenReadersAllowed

public static boolean isScreenReadersAllowed(int permissions)

Tells you if repurposing for screenreaders is allowed.

Parameters:

permissions - the permissions value of a PDF file

Returns:

true if repurposing for screenreaders is allowed

Since:

2.0.7

isAssemblyAllowed

public static boolean isAssemblyAllowed(int permissions)

Tells you if document assembly is allowed.

Parameters:

permissions - the permissions value of a PDF file

Returns:

true if document assembly is allowed

Since:

2.0.7

isDegradedPrintingAllowed

public static boolean isDegradedPrintingAllowed(int permissions)

Tells you if degraded printing is allowed.

Parameters:

permissions - the permissions value of a PDF file

Returns:

true if degraded printing is allowed

Since:

2.0.7