A User Centric Security Model for Tamper-Resistant Devices

C.4 Secure and Trusted Channel Protocol Service Provider
270 r e c e i v i n g B u f f e r = JCSystem . makeTransientByteArray ( ( short ) 568 ,
271 JCSystem .MEMORY_TYPE_TRANSIENT_DESELECT) ;
272 generateResponse ( ( short ) 1) ;
273 } else i f ( this . r e c e i v i n g B u f f e r [ 3 ] ==
274 this . MessageHandlerTagTwo [ 3 ] ) {
275 processSecondMsg ( r e c e i v i n g B u f f e r ) ;
276 r e c e i v i n g B u f f e r = JCSystem . makeTransientByteArray ( ( short ) 568 ,
277 JCSystem .MEMORY_TYPE_TRANSIENT_DESELECT) ;
278 generateResponse ( ( short ) 2) ;
279 } else {
280 ISOException . throwIt ( ProtocolHandler .SW_ERROR_INS) ;
281 }
282 JCSystem . r e q u e s t O b j e c t D e l e t i o n ( ) ;
283 apdu . setOutgoing ( ) ;
284 apdu . setOutgoingLength ( ( short ) copyPointer ) ;
285 apdu . sendBytesLong ( r e c e i v i n g B u f f e r , ( short ) 0 , ( short ) copyPointer ) ;
286 JCSystem . r e q u e s t O b j e c t D e l e t i o n ( ) ;
287 }
288 private void generateResponse ( short msgNumber) {
289 short c h i l d P o i n t e r M e s s a g e = 6 ;
290 short e n c r y p t i o n O f f s e t = 0 ;
291 copyPointer = 0 ;
292 i f (msgNumber == 1) {
293 randomDataGen . generateData ( this . SCRandomNumberArray ,
294 this . PTLVDataOffset , ( short ) 16) ;
295 this . dhKeyConGen( this . SPDHChanllengerArray , this . PTLVDataOffset ,
296 ProtocolHandler .GEN_DHKEY) ;
297 copyPointer = U t i l . arrayCopyNonAtomic ( this . MessageHandlerTagOne ,
298 ( short ) 0 , this . r e c e i v i n g B u f f e r , copyPointer , ( short )
299 this . MessageHandlerTagOne . l e n g t h ) ;
300 copyPointer = U t i l . arrayCopyNonAtomic ( this . SCDHData , ( short ) 0 ,
301 this . r e c e i v i n g B u f f e r , copyPointer , ( short )
302 this . SCDHData . l e n g t h ) ;
303 this . r e c e i v i n g B u f f e r [ c h i l d P o i n t e r M e s s a g e ]++;
304 copyPointer = U t i l . arrayCopyNonAtomic ( this . SCRandomNumberArray ,
305 ( short ) 0 , this . r e c e i v i n g B u f f e r , copyPointer , ( short )
306 this . SCRandomNumberArray . l e n g t h ) ;
307 this . r e c e i v i n g B u f f e r [ c h i l d P o i n t e r M e s s a g e ]++;
308 keygenerator ( ) ;
309 copyPointer = U t i l . arrayCopyNonAtomic ( this . EncryptedDataTag ,
310 ( short ) 0 , this . r e c e i v i n g B u f f e r , copyPointer , ( short )
311 this . EncryptedDataTag . l e n g t h ) ;
312 this . r e c e i v i n g B u f f e r [ c h i l d P o i n t e r M e s s a g e ]++;
313 short childEnMessage = ( short ) ( copyPointer + ( short ) 2) ;
314 copyPointer += ( short ) 3 ;
315 e n c r y p t i o n O f f s e t = copyPointer ;
316 copyPointer = U t i l . arrayCopyNonAtomic ( this . SCIdentityTag ,
317 ( short ) 0 , this . r e c e i v i n g B u f f e r , copyPointer , ( short )
318 this . SCIdentityTag . l e n g t h ) ;
319 this . r e c e i v i n g B u f f e r [ childEnMessage ]++;
320 copyPointer = U t i l . arrayCopyNonAtomic ( this . SCRandomNumberArray ,
296