Package com.nimbusds.jose.crypto.impl

Class LegacyAESGCM

java.lang.Object

com.nimbusds.jose.crypto.impl.LegacyAESGCM

@ThreadSafe
public class LegacyAESGCM
extends Object

Legacy AES/GSM/NoPadding encryption and decryption methods. Uses the BouncyCastle.org API. This class is thread-safe.

Version:

2015-11-15

Author:

Vladimir Dzhuvinov, Axel Nennker

Field Summary

Fields

Modifier and Type	Field	Description
static final int	AUTH_TAG_BIT_LENGTH	The standard authentication tag length (128 bits).

Method Summary

Modifier and Type	Method	Description
static org.bouncycastle.crypto.engines.AESEngine	createAESCipher(SecretKey secretKey, boolean forEncryption)	Creates a new AES cipher.
static byte[]	decrypt(SecretKey secretKey, byte[] iv, byte[] cipherText, byte[] authData, byte[] authTag)	Decrypts the specified cipher text using AES/GCM/NoPadding.
static AuthenticatedCipherText	encrypt(SecretKey secretKey, byte[] iv, byte[] plainText, byte[] authData)	Encrypts the specified plain text using AES/GCM/NoPadding.

Methods inherited from class java.lang.Object

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

Field Details

AUTH_TAG_BIT_LENGTH

public static final int AUTH_TAG_BIT_LENGTH

The standard authentication tag length (128 bits).

See Also:

• Constant Field Values

Method Details

createAESCipher

public static org.bouncycastle.crypto.engines.AESEngine createAESCipher(SecretKey secretKey,
 boolean forEncryption)

Creates a new AES cipher.

Parameters:

secretKey - The AES key. Must not be null.

forEncryption - If true creates an AES encryption cipher, else creates an AES decryption cipher.

Returns:

The AES cipher.

encrypt

public static AuthenticatedCipherText encrypt(SecretKey secretKey,
 byte[] iv,
 byte[] plainText,
 byte[] authData)
                                       throws JOSEException

Encrypts the specified plain text using AES/GCM/NoPadding.

Parameters:

secretKey - The AES key. Must not be null.

plainText - The plain text. Must not be null.

iv - The initialisation vector (IV). Must not be null.

authData - The authenticated data. Must not be null.

Returns:

The authenticated cipher text.

Throws:

JOSEException - If encryption failed.

decrypt

public static byte[] decrypt(SecretKey secretKey,
 byte[] iv,
 byte[] cipherText,
 byte[] authData,
 byte[] authTag)
                      throws JOSEException

Decrypts the specified cipher text using AES/GCM/NoPadding.

Parameters:

secretKey - The AES key. Must not be null.

iv - The initialisation vector (IV). Must not be null.

cipherText - The cipher text. Must not be null.

authData - The authenticated data. Must not be null.

authTag - The authentication tag. Must not be null.

Returns:

The decrypted plain text.

Throws:

JOSEException - If decryption failed.