Hi, thanks for making this tool, I thought I wouldn't be able to analyze react native apps anymore ! Anyway, I don't know if I should create another issue, but could you also add support for version 62 please ? Used by: com.canaltp.ametis

Thank you

• I recently tried to decompile the index.android.bundle file with hbctool
• But when tried I faced with this issue

# error
(hbctool) dnoscp@arupadaiveedu:~/Desktop/data/PATCH2$ hbctool disasm apktool/assets/index.android.bundle decompiled
[*] Disassemble 'apktool/assets/index.android.bundle' to 'decompiled' path
Traceback (most recent call last):
  File "/opt/tools/hbctool/bin/hbctool", line 8, in <module>
    sys.exit(main())
  File "/opt/tools/hbctool/lib/python3.10/site-packages/hbctool/__init__.py", line 61, in main
    disasm(args['<HBC_FILE>'], args['<HASM_PATH>'])
  File "/opt/tools/hbctool/lib/python3.10/site-packages/hbctool/__init__.py", line 33, in disasm
    hbco = hbc.load(f)
  File "/opt/tools/hbctool/lib/python3.10/site-packages/hbctool/hbc/__init__.py", line 29, in load
    assert version in HBC, f"The HBC version ({version}) is not supported."
AssertionError: The HBC version (84) is not supported.

• The information of the file

# file info
(hbctool) dnoscp@arupadaiveedu:~/Desktop/data/PATCH2$ file apktool/assets/index.android.bundle 
apktool/assets/index.android.bundle: Hermes JavaScript bytecode, version 84

• Someone please help to solve this issue.

Hi,

First thank you for the support of Version 59. It works well for me.

I am trying to understand the bytecode in the instruction file and have a hard time knowing the offset of the jump.

I looked at the source code of Hermes, they mentioned clearly that : "The address is relative to the offset of the instruction."

In the instruction file, I don't see the addresses of instructions.

Here is my question let's say the code says: Line 100 JmpFalse Addr8:18, Reg8:0 my understanding is if Reg8:0 is false, then the instruction will jump to a relative address to the JumpFalse instruction by 18. Is that means it will jump to line 118?

The number 18 in Addr8:18 is what I don't understand. How I will know where the code will jump if Reg8:0 is False? If it is True, I imagine the next instruction will be executed, but if it is false, I can't see the addresses to knows what will be the next executed instruction.

I know it is Hermes question, but I hope you can make it clear for me.

Thank you.

[*] Disassemble 'index.android.bundle' to 'hbctool' path Traceback (most recent call last): File "/usr/local/bin/hbctool", line 8, in sys.exit(main()) File "/usr/local/lib/python3.9/site-packages/hbctool/init.py", line 61, in main disasm(args['<HBC_FILE>'], args['<HASM_PATH>']) File "/usr/local/lib/python3.9/site-packages/hbctool/init.py", line 33, in disasm hbco = hbc.load(f) File "/usr/local/lib/python3.9/site-packages/hbctool/hbc/init.py", line 29, in load assert version in HBC, f"The HBC version ({version}) is not supported." AssertionError: The HBC version (84) is not supported.

• Version support added 84 (via niosega), 85,89,83
• Test cases are now running some fixing was needed
• Added a readme on how to add new versions.

Very thank for @cyfinoid @anantshri

Hey there, this is a pull request based on the work of https://github.com/niosega/hbctool/tree/draft/hbc-v84/hbctool, to add support for hermes bytecode v85 I'm not super sure how stable it is, as I know practically nothing about React Native, all I know, is that I was able to disassemble a react native app with hbc v85 with this. Feel free to let me if there are any other requirements to getting this merged, other than running tests, which ran successfully

When execute this command poetry install，terminal says "Installing the current project: hbctool (0.1.3)", but where is the output, or where did it installed?

======================================================================
FAIL: test_get_function (hbctool.hbc.hbc76.test.TestHBC76)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/media/x/all/hack_tools/android_pentest/hbctool/hbctool/hbc/hbc76/test.py", line 22, in test_get_function
    self.assertEqual(functionCount, len(target_offsets))
AssertionError: 31666 != 3946

======================================================================
FAIL: test_get_string (hbctool.hbc.hbc76.test.TestHBC76)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/media/x/all/hack_tools/android_pentest/hbctool/hbctool/hbc/hbc76/test.py", line 43, in test_get_string
    self.assertEqual(stringCount, len(target_strings))
AssertionError: 57366 != 4656

----------------------------------------------------------------------
Ran 23 tests in 43.542s

I recieved error when try to disasm hermes 76. Please! Help me :(

C:\Users\Max\feeld\co.feeld\assets>hbctool disasm index.android.bundle test_hasm
[*] Disassemble 'index.android.bundle' to 'test_hasm' path
Traceback (most recent call last):
  File "C:\Users\Max\AppData\Local\Programs\Python\Python310\lib\runpy.py", line 196, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "C:\Users\Max\AppData\Local\Programs\Python\Python310\lib\runpy.py", line 86, in _run_code
    exec(code, run_globals)
  File "C:\Users\Max\AppData\Local\Programs\Python\Python310\Scripts\hbctool.exe\__main__.py", line 7, in <module>
  File "C:\Users\Max\AppData\Local\Programs\Python\Python310\lib\site-packages\hbctool\__init__.py", line 61, in main
    disasm(args['<HBC_FILE>'], args['<HASM_PATH>'])
  File "C:\Users\Max\AppData\Local\Programs\Python\Python310\lib\site-packages\hbctool\__init__.py", line 33, in disasm
    hbco = hbc.load(f)
  File "C:\Users\Max\AppData\Local\Programs\Python\Python310\lib\site-packages\hbctool\hbc\__init__.py", line 29, in load
    assert version in HBC, f"The HBC version ({version}) is not supported."
AssertionError: The HBC version (84) is not supported.

I get the following error when trying to disassemble an android bundle using hermes bytecode version 84:

[*] Disassemble 'index.android.bundle' to 'out' path
[*] Hermes Bytecode [ Source Hash: d47dd92ea0ad2ab0ad46438a7f6f4a2ee383dbf5, HBC Version: 84 ]
Traceback (most recent call last):
  File "hbctool\.venv\Scripts\\hbctool", line 6, in <module>
    sys.exit(main())
             ^^^^^^
  File "hbctool\hbctool\__init__.py", line 61, in main
    disasm(args['<HBC_FILE>'], args['<HASM_PATH>'])
  File "hbctool\hbctool\__init__.py", line 41, in disasm
    hasm.dump(hbco, hasmpath)
  File "hbctool\hbctool\hasm.py", line 67, in dump
    write_func(f, hbc.getFunction(i), i, hbc)
                  ^^^^^^^^^^^^^^^^^^
  File "hbctool\hbctool\hbc\hbc84\__init__.py", line 59, in getFunction
    insts = disassemble(bc)
            ^^^^^^^^^^^^^^^
  File "hbctool\hbctool\hbc\hbc84\translator.py", line 33, in disassemble
    opcode = opcode_mapper[bc[i]]
             ~~~~~~~~~~~~~^^^^^^^
IndexError: list index out of range

• Version support added 84 (via niosega), 85,89,83
• Test cases are now running some fixing was needed
• Added a readme on how to add new versions.

Very thank for https://github.com/cyfinoid @anantshri

Hi @bongtrop Thanks for the nice tool.

I have been working on updating few things here : https://github.com/cyfinoid/hbctool

I see 84,85 support got merged recently hence cant open a clear pull request. Following changes are available in my branch if you want to cherrypick

1. Version support added 84 (via niosega), 85,89,83
2. Test cases are now running some fixing was needed
3. Added a readme on how to add new versions.

Feel free to pick and choose

The example index.android.bundle file is version 74 and not 76

00000000: c61f bc03 c103 191f 4a00 0000 d031 0a88  ........J....1..

byte 0x9 should be 4c and not 4a

Hi, i got error with command "hbctool disasm index.android.bundle test_hasm". Please help: [*] Disassemble 'index.android.bundle' to 'test_hasm' path Traceback (most recent call last): File "C:\Program Files\Python310\lib\runpy.py", line 196, in run_module_as_main return run_code(code, main_globals, None, File "C:\Program Files\Python310\lib\runpy.py", line 86, in run_code exec(code, run_globals) File "C:\Program Files\Python310\Scripts\hbctool.exe_main.py", line 7, in File "C:\Program Files\Python310\lib\site-packages\hbctool_init.py", line 61, in main disasm(args['<HBC_FILE>'], args['<HASM_PATH>']) File "C:\Program Files\Python310\lib\site-packages\hbctool_init.py", line 33, in disasm hbco = hbc.load(f) File "C:\Program Files\Python310\lib\site-packages\hbctool\hbc_init_.py", line 28, in load assert magic == MAGIC, f"The magic ({hex(magic)}) is invalid. (must be {hex(MAGIC)})" AssertionError: The magic (0x55425f5f20726176) is invalid. (must be 0x1f1903c103bc1fc6)