CompositeKey (Nimbus JOSE + JWT v9.16)

java.lang.Object
- com.nimbusds.jose.crypto.impl.CompositeKey

```
@Immutable
public final class CompositeKey
extends Object
```
Composite key used in AES/CBC/PKCS5Padding/HMAC-SHA2 encryption. This class is immutable.
See RFC 7518 (JWA), section 5.2.
See draft-mcgrew-aead-aes-cbc-hmac-sha2-01

Version:

2015-06-29

Author:

Vladimir Dzhuvinov

Constructor Summary

Constructors
Constructor Description

CompositeKey(SecretKey inputKey)
Creates a new composite key from the specified secret key.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`SecretKey`	`getAESKey()`	Gets the extracted encryption key.
`SecretKey`	`getInputKey()`	Gets the input key.
`SecretKey`	`getMACKey()`	Gets the extracted MAC key.
`int`	`getTruncatedMACByteLength()`	Gets the expected truncated MAC length.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - CompositeKey
```
public CompositeKey(SecretKey inputKey)
             throws KeyLengthException
```
    Creates a new composite key from the specified secret key.
    
    Parameters:
    
    inputKey - The input key. Must be 256, 384 or 512 bits long. Must not be null.
    
    Throws:
    
    KeyLengthException - If the input key length is not supported.
- Method Detail
  - getInputKey
```
public SecretKey getInputKey()
```
    Gets the input key.
    
    Returns:
    
    The input key.
  - getMACKey
```
public SecretKey getMACKey()
```
    Gets the extracted MAC key.
    
    Returns:
    
    The extracted MAC key.
  - getTruncatedMACByteLength
```
public int getTruncatedMACByteLength()
```
    Gets the expected truncated MAC length.
    
    Returns:
    
    The expected truncated MAC length, in bytes.
  - getAESKey
```
public SecretKey getAESKey()
```
    Gets the extracted encryption key.
    
    Returns:
    
    The extracted encryption key.