Bouncy Castle Cryptography Library 1.80 · org.bouncycastle.bcpg.AEADUtils

Access	Constructor and Description
private	AEADUtils()

Method Summary

Modifier and Type	Method and Description
public static int	Returns: length of the auth tag getAuthTagLength(int AEAD algorithm identifier aeadAlgorithmTag) Return the length of the authentication tag used by the given AEAD algorithm in octets.
public static int	Returns: length of the IV getIVLength(int AEAD algorithm identifier aeadAlgorithmTag) Return the length of the IV used by the given AEAD algorithm in octets.
public static byte[][]	Returns: array of arrays containing message key and IV splitMessageKeyAndIv(byte[] m+n-8 bytes of concatenated message key and IV messageKeyAndIv, int symmetric cipher algorithm cipherAlgo, int AEAD algorithm aeadAlgo) Split a given byte array containing m

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

AEADUtils	back to summary
private AEADUtils()

getAuthTagLength	back to summary
public static int getAuthTagLength(int aeadAlgorithmTag) Return the length of the authentication tag used by the given AEAD algorithm in octets. Parameters aeadAlgorithmTag:int AEAD algorithm identifier Returns:int length of the auth tag

getAuthTagLength

public static int getAuthTagLength(int aeadAlgorithmTag)

Return the length of the authentication tag used by the given AEAD algorithm in octets.

Parameters

Returns:int

length of the auth tag

getIVLength	back to summary
public static int getIVLength(int aeadAlgorithmTag) Return the length of the IV used by the given AEAD algorithm in octets. Parameters aeadAlgorithmTag:int AEAD algorithm identifier Returns:int length of the IV

getIVLength

public static int getIVLength(int aeadAlgorithmTag)

Return the length of the IV used by the given AEAD algorithm in octets.

Parameters

Returns:int

length of the IV

splitMessageKeyAndIv	back to summary
public static byte[][] splitMessageKeyAndIv(byte[] messageKeyAndIv, int cipherAlgo, int aeadAlgo) Split a given byte array containing m bytes of key and n-8 bytes of IV into two separate byte arrays. m is the key length of the cipher algorithm, while n is the IV length of the AEAD algorithm. Note, that the IV is filled with n-8 bytes only, the remainder is left as 0s. Return an array of both arrays with the key and index 0 and the IV at index 1. Parameters messageKeyAndIv:byte[] m+n-8 bytes of concatenated message key and IV cipherAlgo:int symmetric cipher algorithm aeadAlgo:int AEAD algorithm Returns:byte[][] array of arrays containing message key and IV

splitMessageKeyAndIv

public static byte[][] splitMessageKeyAndIv(byte[] messageKeyAndIv, int cipherAlgo, int aeadAlgo)

Split a given byte array containing

bytes of key and

n-8

bytes of IV into two separate byte arrays.

is the key length of the cipher algorithm, while

is the IV length of the AEAD algorithm. Note, that the IV is filled with

n-8

bytes only, the remainder is left as 0s. Return an array of both arrays with the key and index 0 and the IV at index 1.

Parameters

messageKeyAndIv:byte[]

m+n-8

bytes of concatenated message key and IV

cipherAlgo:int

symmetric cipher algorithm

aeadAlgo:int

AEAD algorithm

Returns:byte[][]

array of arrays containing message key and IV