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I cannot find anything on this. I'm getting error:

Traceback (most recent call last):
  File "/path/to/pwdb.py", line 265, in <module>
    password_db()
  File "/path/to/pwdb.py", line 73, in __init__
    self.cipher = AES.new(key,AES.MODE_ECB)
  File "/home/STACKOVERFLOW/.local/lib/python3.10/site-packages/Crypto/Cipher/AES.py", line 95, in new
    return AESCipher(key, *args, **kwargs)
  File "/home/STACKOVERFLOW/.local/lib/python3.10/site-packages/Crypto/Cipher/AES.py", line 59, in __init__
    blockalgo.BlockAlgo.__init__(self, _AES, key, *args, **kwargs)
  File "/home/STACKOVERFLOW/.local/lib/python3.10/site-packages/Crypto/Cipher/blockalgo.py", line 141, in __init__
    self._cipher = factory.new(key, *args, **kwargs)
SystemError: PY_SSIZE_T_CLEAN macro must be defined for '#' formats

I'm pretty sure the line it's getting the error from is:

self.cipher = AES.new(key,AES.MODE_ECB)

The script was working not too long ago. Did PyCrypto update its formatting or something ? And does anyone have any idea on how to fix this ? I can provide more of the code if need be.

WaXxX333
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4 Answers4

14

uninstall pycryto and install pycryptodome

pip uninstall pycrypto
pip install pycryptodome
Pradeep Kumar
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    Your answer could be improved with additional supporting information. Please [edit] to add further details, such as citations or documentation, so that others can confirm that your answer is correct. You can find more information on how to write good answers [in the help center](/help/how-to-answer). – Community Sep 17 '22 at 21:33
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    pycrypto is no longer maintained: see https://www.pycrypto.org/ pycryptodome is the modern maintained replacement for pycrypto – John Allsup Jan 18 '23 at 16:35
  • Downvoted because: No explanation and didn’t change anything on my system. – Torsten Bronger Jul 07 '23 at 15:45
  • ERROR: Cannot uninstall 'pycrypto'. It is a distutils installed project and thus we cannot accurately determine which files belong to it which would lead to only a partial uninstall. – Fermi-4 Jul 12 '23 at 03:03
12

It sounds like the extension was not updated for python 3.10.

On 3.10 any module(s) that use the # variant when parsing arguments need to have a #define PY_SSIZE_T_CLEAN before including Python.h.

From the docs:

For all # variants of formats (s#, y#, etc.), the macro PY_SSIZE_T_CLEAN must be defined before including Python.h. On Python 3.9 and older, the type of the length argument is Py_ssize_t if the PY_SSIZE_T_CLEAN macro is defined, or int otherwise.

See https://docs.python.org/3/c-api/arg.html#strings-and-buffers

frmdstryr
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4

You can use pycryptodome python package instead of pycrypto. Pycryptodome seems to have replaced the currently not maintained pycrypto package and works as is with the python 3.10 related changes as well.

Community
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user1969176
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    As it’s currently written, your answer is unclear. Please [edit] to add additional details that will help others understand how this addresses the question asked. You can find more information on how to write good answers [in the help center](/help/how-to-answer). – Community May 17 '22 at 14:01
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    While this link may answer the question, it is better to include the essential parts of the answer here and provide the link for reference. Link-only answers can become invalid if the linked page changes. - [From Review](/review/late-answers/31793428) – Emi OB May 19 '22 at 10:05
1

I might have fixed it for AES, pretty sure I fixed it for RIPEMD160, as my slotmachine code is now running on termux, and it wasn't before. The code changes are at https://github.com/jcomeauictx/pycrypto/commit/38e5ebbf98fea96cf67b354e13fef7d1959ec34a, and you can install it using pip install git+https://github.com/jcomeauictx/pycrypto. Note that I haven't made any attempt to fix any security issues in the pycrypto code, I only addressed this PY_SSIZE_T_CLEAN problem.

jcomeau_ictx
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