Java Card API

key

2017-05-22 16:50:07 M&W SmartCard 3

javacard.security

Interface Key

All Known Subinterfaces: AESKey , DESKey , DSAPrivateKey , DSAPublicKey , ECPrivateKey , ECPublicKey , HMACKey , KoreanSEEDKey , PrivateKey , PublicKey , RSAPrivateCrtKey , RSAPrivateKey , RSAPublicKey , SecretKey


The Key interface is the base interface for all keys.

A Key object sets its initialized state to true only when all the associated Key object parameters have been set at least once since the time the initialized state was set to false. A newly created Key object sets its initialized state to false. Invocation of the clearKey() method sets the initialized state to false. A key with transient key data sets its initialized state to false on the associated clear events.

See Also:KeyBuilder


Method Summary
 void clearKey ()          Clears the key and sets its initialized state to false.
 short getSize ()          Returns the key size in number of bits.
 byte getType ()          Returns the key interface type.
 boolean isInitialized ()          Reports the initialized state of the key.

 

Method Detail

isInitialized

boolean isInitialized()

Reports the initialized state of the key. Keys must be initialized before being used. A Key object sets its initialized state to true only when all the associated Key object parameters have been set at least once since the time the initialized state was set to false. A newly created Key object sets its initialized state to false. Invocation of the clearKey() method sets the initialized state to false. A key with transient key data sets its initialized state to false on the associated clear events.

Returns:true if the key has been initialized


clearKey

void clearKey()

Clears the key and sets its initialized state to false.


getType

byte getType()

Returns the key interface type.

Returns:the key interface type. Valid codes listed in TYPE_* constants See TYPE_DES_TRANSIENT_RESET .

See Also:KeyBuilder


getSize

short getSize()

Returns the key size in number of bits.

Returns:the key size in number of bits 


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