A User Centric Security Model for Tamper-Resistant Devices

C.3 Attestation Protocol
163 apdu . setOutgoing ( ) ;
164 apdu . setOutgoingLength ( ( short ) copyPointer ) ;
165 apdu . sendBytesLong ( r e c e i v i n g B u f f e r , ( short ) 0 , ( short ) copyPointer ) ;
166 return ;
167 }
168 r e c e i v i n g B u f f e r = null ;
169 b y t e s L e f t = 0 ;
170 b y t e s L e f t = apdu . getIncomingLength ( ) ;
171 r e c e i v i n g B u f f e r = JCSystem . makeTransientByteArray ( bytesLeft ,
172 JCSystem .MEMORY_TYPE_TRANSIENT_DESELECT) ;
173 readCount = ( short ) ( ( short ) apdu . setIncomingAndReceive ( ) ) ;
174 rCount = 0 ;
175 i f ( b y t e s L e f t > 0) {
176 rCount = U t i l . arrayCopyNonAtomic ( apduBuffer ,
177 ISO7816 .OFFSET_EXT_CDATA, r e c e i v i n g B u f f e r , rCount , readCount ) ;
178 b y t e s L e f t −= readCount ;
179 }
180 while ( b y t e s L e f t > 0) {
181 try {
182 readCount = apdu . r e c e i v e B y t e s ( ( short ) 0) ;
183 rCount = U t i l . arrayCopyNonAtomic ( apduBuffer , ( short ) 0 ,
184 r e c e i v i n g B u f f e r , rCount , readCount ) ;
185 b y t e s L e f t −= readCount ;
186 } catch ( Exception aE) {
187 ISOException . throwIt ( ( short ) 0x7AAA) ;
188 }
189 }
190 i f ( this . r e c e i v i n g B u f f e r [ 3 ] == this . MessageHandlerTagOne [ 3 ] ) {
191 try {
192 parseMessage ( r e c e i v i n g B u f f e r ) ;
193 } catch ( Exception cE ) {
194 ISOException . throwIt ( ( short ) 0xA112 ) ;
195 }
196 r e c e i v i n g B u f f e r = JCSystem . makeTransientByteArray ( ( short ) 600 ,
197 JCSystem .MEMORY_TYPE_TRANSIENT_DESELECT) ;
198 generateResponse ( ( short ) 2) ;
199 JCSystem . r e q u e s t O b j e c t D e l e t i o n ( ) ;
200 apdu . setOutgoing ( ) ;
201 apdu . setOutgoingLength ( ( short ) copyPointer ) ;
202 apdu . sendBytesLong ( r e c e i v i n g B u f f e r , ( short ) 0 , ( short ) copyPointer ) ;
203 } else i f ( this . r e c e i v i n g B u f f e r [ 3 ] == this . MessageHandlerTagTwo [ 3 ] ) {
204 i f ( processSecondMsg ( r e c e i v i n g B u f f e r ) ) {
205 return ;
206 } else {
207 ISOException . throwIt ( ( short ) 0xFA17) ;
208 }
209 return ;
210 } else {
211 ISOException . throwIt ( ProtocolHandler .SW_ERROR_INS) ;
212 }
213 JCSystem . r e q u e s t O b j e c t D e l e t i o n ( ) ;
276