Graduate School of Information Security MIN CHUL, KIM HACKING – THE ART OF EXPLOITATION Ox28O BUILDING ON BASIC - ANALYSIS SOURCE CODE

CONTENTS Simplenote.c Bitwise.c Functioncontrol_flags.c UserID_demo.c Notetaker.c Notesearch.c Time_example.c Functionponter_example.c Rand_example.c Game_of_chance.c

SIMPLENOTE.C Permission part

IMPLEMENT SIMPLENOTE.C

BUFFER OVERFLOW memory File save location Buffer destination Buffer start

IMPLEMENT SIMPLENOTE.C

BITWISE.C i12a=i&2b=i&

IMPLEMENT BITWISE.C

FUNCTIONCONTROL_FLAGS. C ♧ mask shift ♧ value=0

IMPLEMENT FCNTL_FLAGS.C

FILE PERMISSIONS -rw-r-r--1nare :57simplenote.c permissionlinkusergroupfile sizedatetimefile name Detail

FILE PERMISSIONS ownershipgroupothers r read w write x operate rwxrwx Change ownership  chown [ownership][.group] [file name] Change permission  chmod [number or symbol] [file name] -rw-r-r--1nare :57simplenote.c permissionlinkusergroupfile sizedatetimefile name Symbol uownership+add permission ggroup-del permission oothers=only permission aallsfile owned user

USER IDs Change shell  user login shell

USER IDs Locked

HACKING.h Making header file Easy to use function

NOTETAKER.c

IMPLEMENT NOTETAKER.c User id

NOTESEARCH.c

IMPLEMENT NOTESEARCH.c Independent

TIME_EXAMPLE.C

TIME_EXAMPLE2.C

IMPLEMENT TIME_EXAMPLE2.C

FUNCTION POINTER.C

RAND_EXAMPLE.C

Different

GAME OF CHANCE.C

PLAY‘GAME OF CHANCE’ I didn’t win the game. T_T