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public interface DESKey
DESKey
contains an 8/16/24-byte key for single/2 key triple DES/3 key triple DES
operations.
When the key data is set, the key is initialized and ready for use.
KeyBuilder
,
Signature
,
Cipher
,
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 |
---|
void setKey(byte[] keyData, short kOff) throws CryptoException, NullPointerException, ArrayIndexOutOfBoundsException
Key
data. The plain text length of input key data is 8 bytes for DES,
16 bytes for 2-key triple DES and 24 bytes for 3-key triple DES.
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 start
CryptoException
- with the following reason code:
CryptoException.ILLEGAL_VALUE
if input data decryption is required and fails.
NullPointerException
- - if the keyData
parameter is null
ArrayIndexOutOfBoundsException
- if kOff
is negative
or the keyData
array is too shortbyte getKey(byte[] keyData, short kOff) throws CryptoException
Key
data in plain text. The length of output key data is 8 bytes for DES,
16 bytes for 2-key triple DES and 24 bytes for 3-key triple DES.
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 start
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.Key
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