GCMParameterSpec

Class Overview

Provides a the parameters for an instance of a


        
         Cipher

using Galois/Counter Mode (GCM). This is an Authenticated Encryption with Associated Data (AEAD) mode for a cipher which allows you to use the


        
         updateAAD(byte[])

method to provide data that is transmitted in the clear but authenticated using a cryptographic Message Authentication Code (MAC).

Summary

Public Constructors
	GCMParameterSpec (int tagLen, byte[] iv) Creates a new `GCMParameterSpec` instance from the specified Initial Vector (IV) from buffer `iv` and a tag length of `tagLen` in bits.
	GCMParameterSpec (int tagLen, byte[] iv, int offset, int byteCount) Creates a new `GCMParameterSpec` instance with the Initial Vector (IV) of `byteCount` bytes from the specified buffer `iv` starting at `offset` and a tag length of `tagLen` in bits.

Public Constructors

GCMParameterSpec (int tagLen, byte[] iv)

Creates a new


           GCMParameterSpec

instance from the specified Initial Vector (IV) from buffer

iv

and a tag length of


           tagLen

in bits.

GCMParameterSpec (int tagLen, byte[] iv, int offset, int byteCount)

Creates a new


           GCMParameterSpec

instance with the Initial Vector (IV) of


           byteCount

bytes from the specified buffer

iv

starting at


           offset

and a tag length of


           tagLen

in bits.

Public Methods
byte[]	getIV () Returns the Initial Vector (IV) used by this parameter spec.
int	getTLen () Returns the size of the tag in bits.

Public Methods

byte[]

getIV ()

Returns the Initial Vector (IV) used by this parameter spec.

int

getTLen ()

Returns the size of the tag in bits.

[Expand]

Inherited Methods

From class java.lang.Object

Object	clone () Creates and returns a copy of this `Object` .
boolean	equals ( Object o) Compares this instance with the specified object and indicates if they are equal.
void	finalize () Invoked when the garbage collector has detected that this instance is no longer reachable.
final Class <?>	getClass () Returns the unique instance of `Class` that represents this object's class.
int	hashCode () Returns an integer hash code for this object.
final void	notify () Causes a thread which is waiting on this object's monitor (by means of calling one of the `wait()` methods) to be woken up.
final void	notifyAll () Causes all threads which are waiting on this object's monitor (by means of calling one of the `wait()` methods) to be woken up.
String	toString () Returns a string containing a concise, human-readable description of this object.
final void	wait () Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object.
final void	wait (long millis, int nanos) Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object or until the specified timeout expires.
final void	wait (long millis) Causes the calling thread to wait until another thread calls the `notify()` or `notifyAll()` method of this object or until the specified timeout expires.

Public Constructors

public GCMParameterSpec (int tagLen, byte[] iv)

Added in API level 19

Creates a new GCMParameterSpec instance from the specified Initial Vector (IV) from buffer iv and a tag length of tagLen in bits.

Throws

IllegalArgumentException	if the specified `iv` is null or `offset` and `byteCount` do not specify a valid chunk in the specified buffer.

public GCMParameterSpec (int tagLen, byte[] iv, int offset, int byteCount)

Added in API level 19

Creates a new GCMParameterSpec instance with the Initial Vector (IV) of byteCount bytes from the specified buffer iv starting at offset and a tag length of tagLen in bits.

Throws

IllegalArgumentException	if the specified `iv` is null or `offset` and `byteCount` do not specify a valid chunk in the specified buffer.
ArrayIndexOutOfBoundsException	if `offset` or `byteCount` are negative.

Public Methods

public byte[] getIV ()

Added in API level 19

Returns the Initial Vector (IV) used by this parameter spec.

public int getTLen ()

Added in API level 19

Returns the size of the tag in bits.

Results

Classes

Class Overview

Summary

Public Constructors

public GCMParameterSpec (int tagLen, byte[] iv)

Throws

public GCMParameterSpec (int tagLen, byte[] iv, int offset, int byteCount)

Throws

Public Methods

public byte[] getIV ()

public int getTLen ()

java.lang.Object
↳	javax.crypto.spec.GCMParameterSpec