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.

  • Field Summary

    Fields
    Modifier and Type
    Field
    Description
    private AESGCMCipher
    cipher
     
    private boolean
    initiated
     
    private final byte[]
    iv
     
    private int
    ivptr
     
    private final byte[]
    key
     

  • Constructor Summary

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

  • Method Summary

    Modifier and Type
    Method
    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 Object

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

  • Field Details

    • cipher

      private AESGCMCipher cipher

    • key

      private final byte[] key

    • initiated

      private boolean initiated

    • iv

      private final byte[] iv

    • ivptr

      private int ivptr

  • Constructor Details

    • 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 Details

    • 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