aeskey

• java.lang.Object
  
• java.lang.Exception
  
• javacard.framework.CardRuntimeException
  
• java.lang.RuntimeException
  
• java.lang.Throwable
  

All Superinterfaces: Key , SecretKey

public interface AESKeyextends SecretKey

AESKey contains a 16/24/32 byte key for AES computations based on the Rijndael algorithm.When the key data is set, the key is initialized and ready for use.

Since:

Java Card 2.2

See Also:KeyBuilder ,Signature ,javacardx.crypto.Cipher ,javacardx.crypto.KeyEncryption

void setKey(byte[] keyData, short kOff) throws CryptoException , NullPointerException , ArrayIndexOutOfBoundsException

Sets the Key data. The plaintext length of input key data is 16/24/32 bytes. The data format is big-endian and right-aligned (the least significant bit is the least significant bit of last byte). Input key data is copied into the internal representation. Note:

• If the key object implements the javacardx.crypto.KeyEncryption interface and the Cipher object specified via setKeyCipher() is not null, keyData is decrypted using the Cipher object.

Parameters:keyData - byte array containing key initialization data

kOff - offset within keyData to start

Throws: CryptoException- with the following reason code:

• CryptoException.ILLEGAL_VALUE if input data decryption is required and fails.

ArrayIndexOutOfBoundsException- if kOff is negative or the keyData array is too short.

NullPointerException- if the keyData parameter is null.

byte getKey(byte[] keyData, short kOff) throws CryptoException

Returns the Key data in plain text. The length of output key data is 16/24/32 bytes. The data format is big-endian and right-aligned (the least significant bit is the least significant bit of last byte).

Parameters:keyData - byte array to return key data

kOff - offset within keyData to start

Returns:the byte length of the key data returned

Throws: CryptoException- with the following reason code:

• CryptoException.UNINITIALIZED_KEY if the key data has not been successfully initialized since the time the initialized state of the key was set to false.

See Also:Key