Address Warnings, Remove Redundant Python setup/requirements

[ryanohoro]

Describe the change

Updates build/python/backend/Dockerfile too use src/python/setup.py and src/python/requirements.txt

Removes build/python/backend/setup.py and build/python/backend/requirements.txt

Removes a user-defined setuptools option that was throwing:

/usr/lib/python3.10/distutils/dist.py:274: UserWarning: Unknown distribution option: 'namespace'

Forces the logging level of the msoffcrypto module to INFO to prevent passwords from being logged.

backend_1      | 2023-02-18 01:33:37 - [DEBUG] msoffcrypto.format.ooxml [ooxml.__init__]: OOXMLFile.type: standard
backend_1      | 2023-02-18 01:33:38 - [DEBUG] msoffcrypto.method.ecma376_standard [ecma376_standard.makekey_from_password]: ['aaa', '0x660e', '0x8004', '0x18', 128, 16, b'\x93\x8b\x91"\xb9\xed^\x12s\x885q\xed\x8b6\xfb']
backend_1      | 2023-02-18 01:33:38 - [DEBUG] msoffcrypto.method.ecma376_standard [ecma376_standard.makekey_from_password]: b'V\x126\xb8JK\x86\x8fR\xe0\x8e\xe8\xa3\x01\\\xdf'
backend_1      | 2023-02-18 01:33:38 - [DEBUG] msoffcrypto.method.ecma376_standard [ecma376_standard.decrypt]: totalSize: 32042

Disables caching module in Dockerfile pytest to remove warnings (cache isn't useful in a container anyway, pytest is running unprivileged):

../../usr/local/lib/python3.10/dist-packages/_pytest/cacheprovider.py:433
  /usr/local/lib/python3.10/dist-packages/_pytest/cacheprovider.py:433: PytestCacheWarning: cache could not write path /strelka/.pytest_cache/v/cache/nodeids
    config.cache.set("cache/nodeids", sorted(self.cached_nodeids))

Replaces fromstring() with frombuffer() in scan_lsb.py and scan_nf.py to remove warnings:

backend_1      | /usr/local/lib/python3.10/dist-packages/strelka-0.0.0-py3.10.egg/strelka/scanners/scan_lsb.py:12: DeprecationWarning: The binary mode of fromstring is deprecated, as it behaves surprisingly on unicode inputs. Use frombuffer instead
backend_1      | /usr/local/lib/python3.10/dist-packages/strelka-0.0.0-py3.10.egg/strelka/scanners/scan_nf.py:25: DeprecationWarning: The binary mode of fromstring is deprecated, as it behaves surprisingly on unicode inputs. Use frombuffer instead

Describe testing procedures

docker-compose -f build/docker-compose.yaml build

...

============================= test session starts ==============================
platform linux -- Python 3.10.6, pytest-7.2.0, pluggy-1.0.0
rootdir: /strelka
plugins: mock-3.10.0, unordered-0.5.2
collected 122 items

tests/test_required_for_scanner.py .
tests/test_scan_base64.py .
tests/test_scan_base64_pe.py .
tests/test_scan_batch.py .
tests/test_scan_bmp_eof.py .
tests/test_scan_bzip2.py .
tests/test_scan_capa.py ...
tests/test_scan_ccn.py .
tests/test_scan_delay.py .
tests/test_scan_dmg.py ...
tests/test_scan_docx.py .
tests/test_scan_elf.py .
tests/test_scan_email.py .
tests/test_scan_encrypted_doc.py ....
tests/test_scan_encrypted_zip.py ..
tests/test_scan_entropy.py .
tests/test_scan_exception.py .
tests/test_scan_exiftool.py ..
tests/test_scan_footer.py ..
tests/test_scan_gif.py .
tests/test_scan_gzip.py .
tests/test_scan_hash.py .
tests/test_scan_header.py ..
tests/test_scan_html.py ..
tests/test_scan_ini.py .
tests/test_scan_iso.py .
tests/test_scan_javascript.py ..
tests/test_scan_jpeg.py ..
tests/test_scan_json.py .
tests/test_scan_libarchive.py ......
tests/test_scan_lnk.py .
tests/test_scan_lzma.py .
tests/test_scan_macho.py .
tests/test_scan_manifest.py .
tests/test_scan_msi.py .
tests/test_scan_nf.py ....
tests/test_scan_ocr.py ...
tests/test_scan_ole.py ....
tests/test_scan_onenote.py ..
tests/test_scan_pcap.py ..
tests/test_scan_pdf.py .
tests/test_scan_pe.py .
tests/test_scan_pgp.py ....
tests/test_scan_plist.py .
tests/test_scan_png_eof.py ...
tests/test_scan_qr.py ...
tests/test_scan_rar.py .
tests/test_scan_seven_zip.py .....
tests/test_scan_strings.py .
tests/test_scan_tar.py .
tests/test_scan_tlsh.py .
tests/test_scan_transcode.py ...................
tests/test_scan_upx.py .
tests/test_scan_url.py ..
tests/test_scan_vhd.py ..
tests/test_scan_x509.py ..
tests/test_scan_xl4ma.py .
tests/test_scan_xml.py .
tests/test_scan_yara.py .
tests/test_scan_zip.py ..

====================== 122 passed, 24 warnings in 43.55s =======================

./strelka-oneshot -l - -f src/python/strelka/tests/fixtures/test.png

{"file":{"depth":0,"flavors":{"mime":["image/png"],"yara":["png_file"]},"name":"test.png","scanners":["ScanEntropy","ScanExiftool","ScanFooter","ScanHash","ScanHeader","ScanLsb","ScanNf","ScanOcr","ScanPngEof","ScanQr","ScanTlsh","ScanYara"],"size":539355,"tree":{"node":"9caf4c19-b2d9-416c-b4ef-9515a5eef139","root":"9caf4c19-b2d9-416c-b4ef-9515a5eef139"}},"request":{"attributes":{"filename":"test.png"},"client":"go-oneshot","id":"9caf4c19-b2d9-416c-b4ef-9515a5eef139","source":"ubuntu","time":1676695140},"scan":{"entropy":{"elapsed":0.000409,"entropy":7.941353347991658},"exiftool":{"elapsed":0.122625,"keys":[{"key":"ImageWidth","value":1236},{"key":"ImageHeight","value":891}]},"footer":{"backslash":"K\\x00\\xba\\x80\\x86\\xb1A33\\x93\\x1c\\x00\\x00@\\xa0\\x1b\\xc1\\xf2\\x06A\\xd2\\x0c-IF\\x81`\\x03\\xf8\\x7f\\xd0\\x9aA\\xba\\x9b'F\\x97\\x00\\x00\\x00\\x00IEND\\xaeB`\\x82","elapsed":0.000058,"footer":"K\u0000����A33�\u001c\u0000\u0000@�\u001b��\u0006A�\u000c-IF�`\u0003��КA��'F�\u0000\u0000\u0000\u0000IEND�B`�"},"hash":{"elapsed":0.013075,"md5":"8d39d685063ed37f21bc13a91276c2ca","sha1":"7c65103b65df7c3669569332c5a4a089cbadf792","sha256":"fbc5d27a8839e5d3298bb0c04ba2c92bf91d08912409fc69f06363ce8c1f1afa","ssdeep":"12288:837ZtoNwdQCzsLhGxMO1QdbKhGtiNEqdXIHy:27ZeKdQCw9GxX15miaqMy","tlsh":"T19EB42376E3871A85F09A989F8C1C0B14ADD795201B4C0CE5F4FEB92E3DE4D45CE0A9B6"},"header":{"backslash":"\\x89PNG\\r\\n\\x1a\\n\\x00\\x00\\x00\\rIHDR\\x00\\x00\\x04\\xd4\\x00\\x00\\x03{\\x08\\x00\\x00\\x00\\x00\\xa8\\xce\\x98\\xe0\\x00\\x00\\x00\\tpHYs\\x00\\x00\\x0b6\\x00\\x00\\x0b6\\x01","elapsed":0.000036,"header":"�PNG\r\n\u001a\n\u0000\u0000\u0000\rIHDR\u0000\u0000\u0004�\u0000\u0000\u0003{\u0008\u0000\u0000\u0000\u0000�Θ�\u0000\u0000\u0000\tpHYs\u0000\u0000\u000b6\u0000\u0000\u000b6\u0001"},"lsb":{"elapsed":0.015532,"lsb":true},"nf":{"elapsed":0.015968,"noise_floor":true,"percentage":0,"threshold":0.25},"ocr":{"elapsed":0.167427},"png_eof":{"elapsed":0.000041,"flags":["no_trailer"]},"qr":{"elapsed":0.088679},"tlsh":{"elapsed":0.00479},"yara":{"elapsed":0.002191,"matches":["test"]}}}

Sample output

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of and tested my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings

[phutelmyer]

LGTM