public interface AESKey extends 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.
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:
javacardx.crypto.KeyEncryption
interface and the Cipher
object specified via setKeyCipher()
is not null
, keyData
is decrypted using the Cipher
object.
keyData
- byte array containing key initialization datakOff
- offset within keyData to startCryptoException
- 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
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).keyData
- byte array to return key datakOff
- offset within keyData
to startCryptoException
- 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.
Key
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