A User Centric Security Model for Tamper-Resistant Devices

C.8 Application Binding Protocol - Distributed
240 i f ( apduBuffer [ ISO7816 .OFFSET_INS] == I n i t i a t i o n P r o t o c o l ) {
241 this . i n i t i a l i s e P r o t o c o l ( ) ;
242 return ;
243 }
244 r e c e i v i n g B u f f e r = null ;
245 b y t e s L e f t = 0 ;
246 b y t e s L e f t = apdu . getIncomingLength ( ) ;
247 r e c e i v i n g B u f f e r = JCSystem . makeTransientByteArray ( bytesLeft ,
248 JCSystem .MEMORY_TYPE_TRANSIENT_DESELECT) ;
249 readCount = ( short ) ( ( short ) apdu . setIncomingAndReceive ( ) ) ;
250 rCount = 0 ;
251 i f ( b y t e s L e f t > 0) {
252 rCount = U t i l . arrayCopyNonAtomic ( apduBuffer ,
253 ISO7816 .OFFSET_EXT_CDATA, r e c e i v i n g B u f f e r , rCount , readCount ) ;
254 b y t e s L e f t −= readCount ;
255 }
256 while ( b y t e s L e f t > 0) {
257 try {
258 readCount = apdu . r e c e i v e B y t e s ( ( short ) 0) ;
259 rCount = U t i l . arrayCopyNonAtomic ( apduBuffer , ( short ) 0 ,
260 r e c e i v i n g B u f f e r , rCount , readCount ) ;
261 b y t e s L e f t −= readCount ;
262 } catch ( Exception aE) {
263 ISOException . throwIt ( ( short ) 0x7AAA) ;
264 }
265 }
266 try {
267 parseMessage ( r e c e i v i n g B u f f e r ) ;
268 } catch ( Exception cE ) {
269 ISOException . throwIt ( ( short ) 0xA112 ) ;
270 }
271 i f ( this . r e c e i v i n g B u f f e r [ 3 ] == this . MessageHandlerTagOne [ 3 ] ) {
272 r e c e i v i n g B u f f e r = JCSystem . makeTransientByteArray ( ( short ) 568 ,
273 JCSystem .MEMORY_TYPE_TRANSIENT_DESELECT) ;
274 generateResponse ( ( short ) 1) ;
275 } else i f ( this . r e c e i v i n g B u f f e r [ 3 ] ==
276 this . MessageHandlerTagTwo [ 3 ] ) {
277 processSecondMsg ( r e c e i v i n g B u f f e r ) ;
278 r e c e i v i n g B u f f e r = JCSystem . makeTransientByteArray ( ( short ) 568 ,
279 JCSystem .MEMORY_TYPE_TRANSIENT_DESELECT) ;
280 generateResponse ( ( short ) 2) ;
281 } else {
282 ISOException . throwIt ( ProtocolHandler .SW_ERROR_INS) ;
283 }
284 JCSystem . r e q u e s t O b j e c t D e l e t i o n ( ) ;
285 apdu . setOutgoing ( ) ;
286 apdu . setOutgoingLength ( ( short ) copyPointer ) ;
287 apdu . sendBytesLong ( r e c e i v i n g B u f f e r , ( short ) 0 , ( short ) copyPointer ) ;
288 JCSystem . r e q u e s t O b j e c t D e l e t i o n ( ) ;
289 }
290 private void generateResponse ( short msgNumber) {
383