com.itextpdf.kernel.crypto

Class AesGcmDecryptor

java.lang.Object

com.itextpdf.kernel.crypto.AesGcmDecryptor

All Implemented Interfaces:

IDecryptor

public class AesGcmDecryptor
extends Object
implements IDecryptor

Class for decrypting aes-gcm encrypted bytes.

Constructor Summary

Constructors

Constructor and Description
AesGcmDecryptor(byte[] key, int off, int len) Creates a new instance of AesGcmDecryptor.

Method Summary

Modifier and Type	Method and Description
byte[]	finish() Finishes a multiple-part decryption operation.
byte[]	update(byte[] b, int off, int len) Continues a multiple-part decryption operation, processing another data part and initializing aes-gcm cipher if this method called for the first time.

Methods inherited from class java.lang.Object

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

Constructor Detail

AesGcmDecryptor

public AesGcmDecryptor(byte[] key,
                       int off,
                       int len)

Creates a new instance of AesGcmDecryptor.

Parameters:

key - the byte array containing the key for decryption

off - offset of the key in the byte array

len - the length of the key in the byte array

Method Detail

update

public byte[] update(byte[] b,
                     int off,
                     int len)

Continues a multiple-part decryption operation, processing another data part and initializing aes-gcm cipher if this method called for the first time.

Specified by:

update in interface IDecryptor

Parameters:

b - the input buffer

off - the offset in input where the input starts

len - the input length

Returns:

decrypted bytes array

finish

public byte[] finish()

Finishes a multiple-part decryption operation.

Specified by:

finish in interface IDecryptor

Returns:

input data that may have been buffered during a previous update operation