A User Centric Security Model for Tamper-Resistant Devices

C.8 Application Binding Protocol - Distributed
190 }
191 public void p r o c e s s (APDU apdu )throws ISOException {
192 byte [ ] apduBuffer = apdu . g e t B u f f e r ( ) ;
193 i f ( s e l e c t i n g A p p l e t ( ) ) {
194 this . i n i t i a l i s e P r o t o c o l ( ) ;
195 return ;
196 }
197 i f ( apduBuffer [ ISO7816 .OFFSET_CLA] != CLA) {
198 ISOException . throwIt (SW_CLASSNOTSUPPORTED) ;
199 }
200 i f ( apduBuffer [ ISO7816 .OFFSET_INS] == I n i t i a t i o n P r o t o c o l ) {
201 r e c e i v i n g B u f f e r = JCSystem . makeTransientByteArray ( ( short ) 64 ,
202 JCSystem .MEMORY_TYPE_TRANSIENT_DESELECT) ;
203 generateResponse ( ( short ) 1) ;
204 apdu . setOutgoing ( ) ;
205 apdu . setOutgoingLength ( ( short ) copyPointer ) ;
206 apdu . sendBytesLong ( r e c e i v i n g B u f f e r , ( short ) 0 , ( short )
207 copyPointer ) ;
208 return ;
209 }
210 r e c e i v i n g B u f f e r = null ;
211 b y t e s L e f t = 0 ;
212 b y t e s L e f t = apdu . getIncomingLength ( ) ;
213 r e c e i v i n g B u f f e r = JCSystem . makeTransientByteArray ( bytesLeft ,
214 JCSystem .MEMORY_TYPE_TRANSIENT_DESELECT) ;
215 readCount = ( short ) ( ( short ) apdu . setIncomingAndReceive ( ) ) ;
216 rCount = 0 ;
217 i f ( b y t e s L e f t > 0) {
218 rCount = U t i l . arrayCopyNonAtomic ( apduBuffer ,
219 ISO7816 .OFFSET_EXT_CDATA, r e c e i v i n g B u f f e r , rCount , readCount ) ;
220 b y t e s L e f t −= readCount ;
221 }
222 while ( b y t e s L e f t > 0) {
223 try {
224 readCount = apdu . r e c e i v e B y t e s ( ( short ) 0) ;
225 rCount = U t i l . arrayCopyNonAtomic ( apduBuffer , ( short ) 0 ,
226 r e c e i v i n g B u f f e r , rCount , readCount ) ;
227 b y t e s L e f t −= readCount ;
228 } catch ( Exception aE) {
229 ISOException . throwIt ( ( short ) 0x7AAA) ;
230 }
231 }
232 i f ( this . r e c e i v i n g B u f f e r [ 3 ] == this . MessageHandlerTagOne [ 3 ] ) {
233 try {
234 parseMessage ( r e c e i v i n g B u f f e r ) ;
235 } catch ( Exception cE ) {
236 ISOException . throwIt ( ( short ) 0xA112 ) ;
237 }
238 r e c e i v i n g B u f f e r = JCSystem . makeTransientByteArray ( ( short ) 600 ,
239 JCSystem .MEMORY_TYPE_TRANSIENT_DESELECT) ;
240 generateResponse ( ( short ) 2) ;
396