HACKABLE SECURITY MODULES

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MEMORY ORGANIZATION 32 bit, byte addressable address space On-chip memory: Organized in data and program spaces Two 64 bit internal ports to access data memory One 256 bit internal port to access program memory Off-chip memory: Data and program spaces are unified via the External Memory InterFace (EMIF) EMIF is 32 bit
ABI - CALLING CONVENTIONS No stack exists (stack as in x86 stack) To call a function you need to calculate the return address by adding PC to the relative offset of the return address using a special assembly instruction (ADDKPC) To return you need to jump to the register where the previous value has been saved ABI specifies this register should be B3 The displacement at a branch instruction is a 21 bit word offset. If the destination is unreachable, the linker must generate a trampoline
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HACKABLE SECURITY MODULES: REVERSIN
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OUTLINE What is an HSM and HSM secu
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USAGE Securely store cryptographic
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BIG PLAYERS Gemalto Bought Safenet,
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BIG PLAYERS Utimaco Primary target
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WHERE ARE THEY USED?
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DNSSEC Root Zone operators store ke
Page 15 and 16: ONE DOES NOT SIMPLY Implement serio
Page 17 and 18: GENERAL INFORMATION As HSMs are use
Page 19 and 20: FIPS 140-2 Defines 4 different secu
Page 21 and 22: FIPS 140-2 FIPS 140-2 validation ha
Page 23 and 24: COMMON CRITERIA Interesting fact: I
Page 25 and 26: VARIOUS MODELS OF THE CRYPTOSERVER
Page 27 and 28: THE HARDWARE Network HSMs are Linux
Page 29 and 30: DEVICE KEY A single key created whe
Page 31 and 32: TOOLS csadm: Command line tool to m
Page 33 and 34: USERS Every user has: An authentica
Page 35 and 36: COMMUNICATION PROTOCOL Custom commu
Page 37 and 38: FORMAT A single blob in a custom .m
Page 39 and 40: MTC FILES Individual firmware modul
Page 41 and 42: MTC FILES $ binwalk adm_3.0.18.1_c5
Page 43 and 44: MTC FILES $ hexdump -C adm_3.0.18.1
Page 45 and 46: MTC FILES $ strings csadm | grep CO
Page 47 and 48: MTC FILES Now what???
Page 49 and 50: MTC FILES We can now extract the CO
Page 51 and 52: MTC FILES
Page 53 and 54: MTC FILES (Insert multiple slides w
Page 55 and 56: THE TMS320C64X DSP Steps to write o
Page 57 and 58: BLOCK DIAGRAM
Page 59 and 60: PARALLEL EXECUTION 8 execution unit
Page 61 and 62: REGISTERS A0-A2,B0-B2 are also cond
Page 63 and 64: DELAY SLOTS Most instructions are e
Page 65: REVERSING TOOLS Still wondering why
Page 69 and 70: ABI - REGISTERS 12 callee-saved reg
Page 71 and 72: IMPLEMENTING THE DISASSEMBLER We kn
Page 73 and 74: THE CAPSTONE DISASSEMBLY FRAMEWORK
Page 75 and 76: WHERE DO WE START? Clone the projec
Page 77 and 78: THE TABLEGEN FILE Let's first gener
Page 79 and 80: WHAT'S ACTUALLY NEEDED? In our case
Page 81 and 82: HOW DO WE DEFINE REGISTERS? Simple,
Page 83 and 84: HOW DO WE DEFINE OPERANDS? def memo
Page 85 and 86: HOW DO WE DEFINE INSTRUCTION CLASSE
Page 87 and 88: HOW DO WE DEFINE INSTRUCTION CLASSE
Page 89 and 90: HOW DO WE DEFINE INSTRUCTIONS? defm
Page 91 and 92: LETS FINISH THIS THING!
Page 93 and 94: PROBLEMS FACED Instructions that us
Page 95 and 96: CONGRATULATIONS! We have a disassem
Page 97 and 98: REVERSING THE FIRMWARE Let's check
Page 99 and 100: REVERSING THE FIRMWARE We've got sy
Page 101 and 102: CAN WE PROFIT? These products are m
Page 103 and 104: EXTRACTION OF MBK DATABASE BACKUP S
Page 105 and 106: WHAT ABOUT OTHER BUGS? All the code
Page 107 and 108: DOWNLOADS Reversing tools: https://
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