Package com.itextpdf.kernel.crypto.securityhandler

Class PubSecHandlerUsingAes256

java.lang.Object

com.itextpdf.kernel.crypto.securityhandler.SecurityHandler

com.itextpdf.kernel.crypto.securityhandler.PubKeySecurityHandler

com.itextpdf.kernel.crypto.securityhandler.PubSecHandlerUsingAes128

com.itextpdf.kernel.crypto.securityhandler.PubSecHandlerUsingAes256

Direct Known Subclasses:

PubSecHandlerUsingAesGcm

       public class PubSecHandlerUsingAes256 extends PubSecHandlerUsingAes128
      

Field Summary

Fields inherited from class com.itextpdf.kernel.crypto.securityhandler.SecurityHandler

extra, md5, mkey, nextObjectKey, nextObjectKeySize

Constructor Summary

Constructors

Constructor	Description
PubSecHandlerUsingAes256(PdfDictionary encryptionDictionary, Certificate[] certs, int[] permissions, boolean encryptMetadata, boolean embeddedFilesOnly)
PubSecHandlerUsingAes256(PdfDictionary encryptionDictionary, Key certificateKey, Certificate certificate, String certificateKeyProvider, IExternalDecryptionProcess externalDecryptionProcess, boolean encryptMetadata)

Method Summary

Modifier and Type	Method	Description
protected String	getDigestAlgorithm()
protected void	initKey(byte[] globalKey, int keyLength)
protected void	initMd5MessageDigest()	Init md5 message digest.
void	setHashKeyForNextObject(int objNumber, int objGeneration)	Note: For most of the supported security handlers algorithm to calculate encryption key for particular object is the same.
protected void	setPubSecSpecificHandlerDicEntries(PdfDictionary encryptionDictionary, boolean encryptMetadata, boolean embeddedFilesOnly)

Methods inherited from class com.itextpdf.kernel.crypto.securityhandler.PubSecHandlerUsingAes128

getDecryptor, getEncryptionStream

Methods inherited from class com.itextpdf.kernel.crypto.securityhandler.PubKeySecurityHandler

addAllRecipients, computeGlobalKey, computeGlobalKeyOnReading, createRecipientsArray, initKeyAndFillDictionary, initKeyAndReadDictionary

Methods inherited from class com.itextpdf.kernel.crypto.securityhandler.SecurityHandler

getMkey, getNextObjectKey

Methods inherited from class java.lang.Object

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

Constructor Details

PubSecHandlerUsingAes256

             public PubSecHandlerUsingAes256
             (PdfDictionary encryptionDictionary, Certificate[] certs, int[] permissions, boolean encryptMetadata, boolean embeddedFilesOnly)
            

PubSecHandlerUsingAes256

             public PubSecHandlerUsingAes256
             (PdfDictionary encryptionDictionary, Key certificateKey, Certificate certificate, String certificateKeyProvider, IExternalDecryptionProcess externalDecryptionProcess, boolean encryptMetadata)
            

Method Details

setHashKeyForNextObject

             public void setHashKeyForNextObject
             (int objNumber, int objGeneration)
            

Description copied from class: SecurityHandler

Note: For most of the supported security handlers algorithm to calculate encryption key for particular object is the same.

Overrides:

setHashKeyForNextObject in class PubSecHandlerUsingAes128

Parameters:

objNumber - number of particular object for encryption

objGeneration - generation of particular object for encryption

getDigestAlgorithm

             protected String getDigestAlgorithm()
            

Overrides:

getDigestAlgorithm in class PubSecHandlerUsingAes128

initKey

             protected void initKey
             (byte[] globalKey, int keyLength)
            

Overrides:

initKey in class PubSecHandlerUsingAes128

setPubSecSpecificHandlerDicEntries

             protected void setPubSecSpecificHandlerDicEntries
             (PdfDictionary encryptionDictionary, boolean encryptMetadata, boolean embeddedFilesOnly)
            

Overrides:

setPubSecSpecificHandlerDicEntries in class PubSecHandlerUsingAes128

initMd5MessageDigest

             protected void initMd5MessageDigest()
            

Init md5 message digest.

Overrides:

initMd5MessageDigest in class SecurityHandler