A User Centric Security Model for Tamper-Resistant Devices

C.5 Secure and Trusted Channel Protocol Smart Card
237 apdu . setOutgoingLength ( ( short ) copyPointer ) ;
238 apdu . sendBytesLong ( r e c e i v i n g B u f f e r , ( short ) 0 , ( short ) copyPointer ) ;
239 } else i f ( this . r e c e i v i n g B u f f e r [ 3 ] == this . MessageHandlerTagTwo [ 3 ] ) {
240 i f ( processSecondMsg ( r e c e i v i n g B u f f e r ) ) {
241 return ;
242 } else {
243 ISOException . throwIt ( ( short ) 0xFA17) ;
244 }
245 return ;
246 } else {
247 ISOException . throwIt ( ProtocolHandler .SW_ERROR_INS) ;
248 }
249 JCSystem . r e q u e s t O b j e c t D e l e t i o n ( ) ;
250 }
251 private void generateResponse ( short msgNumber) {
252 short childPM1 = 0 ;
253 short childPM2 = 0 ;
254 copyPointer = 0 ;
255 i f (msgNumber == 1) {
256 copyPointer = U t i l . arrayCopy ( this . SCProtocolInitiatorTag , ( short ) 0 ,
257 this . r e c e i v i n g B u f f e r , copyPointer ,
258 ( short )
259 this . S C P r o t o c o l I n i t i a t o r T a g . l e n g t h ) ;
260 randomDataGen . generateData ( this . SCRandomNumberArray ,
261 this . PTLVDataOffset , ( short ) 16) ;
262 childPM1 = copyPointer ;
263 copyPointer += 2 ;
264 phMacGeneratorKey . setKey ( this . SCRandomNumberArray ,
265 this . PTLVDataOffset ) ;
266 phMacGenerator . i n i t ( phMacGeneratorKey , S i g n a t u r e .MODE_SIGN,
267 I n i t i a l i s a t i o n V e c t o r , ( short ) 0 , ( short )
268 I n i t i a l i s a t i o n V e c t o r . l e n g t h ) ;
269 short l e n g t h = 0 ;
270 l e n g t h = phMacGenerator . s i g n (SCDHData , ( short ) this . PTLVDataOffset ,
271 ( short ) (SCDHData . l e n g t h −
272 this . PTLVDataOffset ) ,
273 this . r e c e i v i n g B u f f e r , copyPointer ) ;
274 copyPointer += l e n g t h ;
275 this . shortToBytes ( this . r e c e i v i n g B u f f e r , childPM1 , l e n g t h ) ;
276 return ;
277 } else i f (msgNumber == 2) {
278 this . dhKeyConGen( this . SPDHChanllengerArray , this . PTLVDataOffset ,
279 ProtocolHandler .GEN_DHKEY) ;
280 keygenerator ( ) ;
281 childPM1 = ( short ) 6 ;
282 copyPointer = U t i l . arrayCopyNonAtomic ( this . MessageHandlerTagTwo ,
283 ( short ) 0 , this . r e c e i v i n g B u f f e r , copyPointer , ( short )
284 this . MessageHandlerTagTwo . l e n g t h ) ;
285 copyPointer = U t i l . arrayCopyNonAtomic ( this . SCDHData , ( short ) 0 ,
286 this . r e c e i v i n g B u f f e r , ( short ) copyPointer , ( short )
287 this . SCDHData . l e n g t h ) ;
318