[bug]: "Exception: cryptography>=3.1 is required for AES algorithm"

[ga-it]

PDF imports fail with "Exception: cryptography>=3.1 is required for AES algorithm"

processing source: files__default: 7999370
Traceback (most recent call last):
File "/app/context_chat_backend/chain/ingest/doc_loader.py", line 133, in decode_source
result = _loader_mapmimetype
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/app/context_chat_backend/chain/ingest/doc_loader.py", line 43, in _load_pdf
return '\n\n'.join([page.extract_text().strip() for page in pdf_reader.pages])
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/app/context_chat_backend/chain/ingest/doc_loader.py", line 43, in
return '\n\n'.join([page.extract_text().strip() for page in pdf_reader.pages])
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.11/dist-packages/pypdf/_page.py", line 2595, in iter
for i in range(len(self)):
^^^^^^^^^
File "/usr/local/lib/python3.11/dist-packages/pypdf/_page.py", line 2520, in len
return self.length_function()
^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.11/dist-packages/pypdf/_doc_common.py", line 351, in get_num_pages
return self.root_object["/Pages"]["/Count"] # type: ignore
~~~~~~~~~~~~~~~~^^^^^^^^^^
File "/usr/local/lib/python3.11/dist-packages/pypdf/generic/_data_structures.py", line 477, in getitem
return dict.getitem(self, key).get_object()
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.11/dist-packages/pypdf/generic/_base.py", line 371, in get_object
return self.pdf.get_object(self)
^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.11/dist-packages/pypdf/_reader.py", line 418, in get_object
retval = self._get_object_from_stream(indirect_reference) # type: ignore
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.11/dist-packages/pypdf/_reader.py", line 354, in _get_object_from_stream
obj_stm: EncodedStreamObject = IndirectObject(stmnum, 0, self).get_object() # type: ignore
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.11/dist-packages/pypdf/generic/_base.py", line 371, in get_object
return self.pdf.get_object(self)
^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.11/dist-packages/pypdf/_reader.py", line 488, in get_object
retval = self._encryption.decrypt_object(
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.11/dist-packages/pypdf/_encryption.py", line 863, in decrypt_object
return cf.decrypt_object(obj)
^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.11/dist-packages/pypdf/_encryption.py", line 99, in decrypt_object
obj._data = self.stm_crypt.decrypt(obj._data)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.11/dist-packages/pypdf/_crypt_providers/_fallback.py", line 69, in decrypt
raise DependencyError(_DEPENDENCY_ERROR_STR)
pypdf.errors.DependencyError: cryptography>=3.1 is required for AES algorithm
ERROR:root:Error decoding source file (files__default: 7999370)

[Nextcloud Hub 9] (30.0.1)
Nextcloud Assistant Context Chat 4.0.1
context_chat_backend 4.0.1
Remote AppAPI server

[kyteinsky]

hello, thanks for trying it out again!
Is 7999370 file id a password protected pdf? If yes, we don't support that and probably won't in the future too.

[DaphneMuller]

maybe drop a line in the AI documentation about password protected pdf's not supported :)