javacard.security

Interface AESKey

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

Method Summary
 byte getKey (byte[] keyData,short kOff)          Returns the Key data in plain text.
 void setKey (byte[] keyData,short kOff)          Sets the Key data.

 

Methods inherited from interface javacard.security.Key
clearKey , getSize , getType , isInitialized

 

Method Detail

setKey

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:



Parameters:keyData - byte array containing key initialization data

kOff - offset within keyData to start

Throws: CryptoException - with the following reason code:


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

NullPointerException - if the keyData parameter is null.

getKey

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:


See Also:Key