Applications & SmartCard : JavaCard - Identification - LIFL
Applications & SmartCard : JavaCard - Identification - LIFL
Applications & SmartCard : JavaCard - Identification - LIFL
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Javacard.Security<br />
• Key<br />
Base interface for all keys<br />
• DESKey<br />
Contains an 8/16/24 byte key<br />
• single / 2 keys triple DES / 3 keys triple DES operations<br />
Declaration :<br />
Javacard.Security<br />
Example<br />
private Cipher myDESAlgo;<br />
private DESKey myDESKey;<br />
• DSAKey<br />
Base interface for the DSA algorithms<br />
• private and public key implementations<br />
http://www.lifl.fr/~grimaud/Cours<br />
<strong>JavaCard</strong> System & Framework 69<br />
http://www.lifl.fr/~grimaud/Cours<br />
<strong>JavaCard</strong> System & Framework 70<br />
Initialisation :<br />
Javacard.Security<br />
Example<br />
// produce/select the algo<br />
myDESAlgo = Cipher.getInstance(<br />
Cipher.ALG_DES_ECB_NOPAD,<br />
false);<br />
// produce the key<br />
myDESKey = (DESKey)KeyBuilder.buildKey(<br />
KeyBuilder.TYPE_DES,<br />
KeyBuilder.LENGTH_DES3_2KEY,<br />
false);<br />
// init the key<br />
myDESKey.setKey(<br />
buffer,<br />
dataOffset);<br />
Use :<br />
Javacard.Security<br />
Example<br />
// DES encryption<br />
// initialize algorithm with default key<br />
myDESAlgo.init(<br />
myDESKey,<br />
Cipher.MODE_ENCRYPT);<br />
// compute DES on data<br />
myDESAlgo.doFinal(<br />
buffer,<br />
(short)ISO7816.OFFSET_CDATA,<br />
count,<br />
buffer,<br />
(short)0);<br />
http://www.lifl.fr/~grimaud/Cours<br />
<strong>JavaCard</strong> System & Framework 71<br />
http://www.lifl.fr/~grimaud/Cours<br />
<strong>JavaCard</strong> System & Framework 72
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