A User Centric Security Model for Tamper-Resistant Devices

C.3 Attestation Protocol
302 }
303 break ;
304 case 0 :
305 cTemp = ( ConstructedTLV )inCTLV . getNext ( ) ;
306 i f ( Arrays . e q u a l s (cTemp . getTagName ( ) ,
307 this . EncryptedData . getTagName ( ) ) ) {
308 this . EncryptedData = cTemp ;
309 } else i f ( Arrays . e q u a l s (cTemp . getTagName ( ) ,
310 S C U s e r C e r t i f i c a t e . getTagName ( ) ) ) {
311 this . S C U s e r C e r t i f i c a t e = cTemp ;
312 } else i f ( Arrays . e q u a l s (cTemp . getTagName ( ) ,
313 S C C e r t i f i c a t e . getTagName ( ) ) ) {
314 this . S C C e r t i f i c a t e = cTemp ;
315 }
316 break ;
317 default :
318 System . out . p r i n t l n ( " Error In Parsing Input Message " ) ;
319 }
320 c h i l d s −−;
321 }
322 } catch ( Exception e ) {
323 System . out . p r i n t l n (
324 " Error i n ProtocolHanlder . ChildExtractionMethod
: " + e . g e t C l a s s ( ) . getName ( ) ) ;
325 }
326 }
327 void GenerateKeys ( byte [ ] i n b u f f ) {
328 byte [ ] DHSecretKey = null ;
329 try {
330 DHSecretKey =
331 this . myProtocolHelperObject . GenerateDHSessionKeyMaterial ( i n b u f f ,
0 ,
332 i n b u f f . l e n g t h ) ;
333 } catch ( Exception cE ) {
334 System . out . p r i n t l n (
335 " Exception At P r o t o c o l H e l p e r C l a s s . GenerateKeys :
" + cE . g e t C l a s s ( ) . getName ( ) ) ;
336 }
337 byte [ ] keyGenKey = new byte [ 1 6 ] ;
338 System . arraycopy ( DHSecretKey , 0 , keyGenKey , 0 , keyGenKey . l e n g t h ) ;
339 byte [ ] macInputValue = new byte [ 6 4 ] ;
340 System . arraycopy ( this . CMRandomNumber . getValueBytes ( ) , 0 ,
macInputValue ,
341 0 , 16) ;
342 System . arraycopy ( this . SCRandomNumber . getValueBytes ( ) , 0 ,
macInputValue ,
343 16 , 16) ;
344 System . arraycopy ( DHSecretKey , 16 , macInputValue , 32 , 16) ;
345 for ( int i = 4 8 ; i < 6 4 ; i ++) {
346 macInputValue [ i ] = ( byte ) 0x02 ;
347 }
289