A User Centric Security Model for Tamper-Resistant Devices

C.4 Secure and Trusted Channel Protocol Service Provider
197 }
198 } else {
199 System . out . p r i n t l n (
200 " P r o t o c o l Stoped : I l l e g a l Message Value
( ProtocolHanlder . inMessageProcessing ( ) " ) ;
201 }
202 return this . MessageHandler . getBytesTlvRepresentation ( ) ;
203 }
204 public boolean inMessageProcessing ( byte [ ] inMessage , int Counter ) {
205 try {
206 i f ( Counter == 1) {
207 MessageHandler . s e t B y t e s T l v R e p r e s e n t a t i o n ( inMessage , 0 ,
208 ( inMessage . l e n g t h − 2) ) ;
209 childExtractionFromCTLV ( MessageHandler ) ;
210 GenerateKeys ( this . SCDHChallenge . getValueBytes ( ) ) ;
211 byte [ ] temp = new byte [ 1 6 ] ;
212 this . myProtocolHelperObject . GenerateMac
213 ( this . EncryptedData . getValueBytes ( ) , 0 ,
214 this . EncryptedData . getValueBytes ( ) . length , temp , 0 ,
215 this . mySessionMacKey ) ;
216 i f ( Arrays . e q u a l s ( this . MACedData . getValueBytes ( ) , temp ) ) {}
217 else {
218 System . out . p r i n t l n (
219 " I n t e g r i t y Check F a i l u r e : ERROR at
ProtocolHandler . inMessageProcessing \n" ) ;
220 System . e x i t ( 0 ) ;
221 }
222 this . myProtocolHelperObject . GenerateDecryption
223 ( this . EncryptedData . getValueBytes ( ) , 0 ,
224 this . EncryptedData . getValueBytes ( ) . length ,
225 this . EncryptedData . getBytesTlvRepresentation ( ) , 7 ,
226 this . mySessionEncryptionKey ) ;
227 childExtractionFromCTLV ( this . EncryptedData ) ;
228 childExtractionFromCTLV ( this . S C U s e r C e r t i f i c a t e ) ;
229 B i g I n t e g e r publicExponent = new B i g I n t e g e r ( byteToString
230 ( this . PublicExponent . getValueBytes ( ) ) , 16) ;
231 B i g I n t e g e r publicModulus = new B i g I n t e g e r ( byteToString
232 ( this . PublicModulus . getValueBytes ( ) ) , 16) ;
233 KeyFactory f a c t o r y = KeyFactory . g e t I n s t a n c e ( "RSA" ) ;
234 SCUserVerificationKey = ( PublicKey ) f a c t o r y . g e n e r a t e P u b l i c (new
235 RSAPublicKeySpec ( publicModulus ,
236 publicExponent ) ) ;
237 temp = new byte [ ( this . SCIdentity . getTagLength ( ) +
238 this . SCRandomNumber . getTagLength ( ) +
239 this . SPRandomNumber . getTagLength ( ) ) ] ;
240 System . arraycopy ( this . EncryptedData . getBytesTlvRepresentation
241 ( ) , 7 , temp , 0 , temp . l e n g t h ) ;
242 i f ( this . myProtocolHelperObject . SignatureMethod ( temp , 0 ,
243 temp . length , this . SignedData . getValueBytes ( ) , 0 ,
244 SCUserVerificationKey ,
245 P r o t o c o l H e l p e r C l a s s .SIGN_MODE_VERIFICATION) ) {}
308