[3.10] gh-61460: Stronger HMAC in multiprocessing (GH-20380) #31
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bpo-17258: `multiprocessing` now supports stronger HMAC algorithms for inter-process connection authentication rather than only HMAC-MD5. Signed-off-by: Christian Heimes <christian@python.org> gpshead: I Reworked to be more robust while keeping the idea. The protocol modification idea remains, but we now take advantage of the message length as an indicator of legacy vs modern protocol version. No more regular expression usage. We now default to HMAC-SHA256, but do so in a way that will be compatible when communicating with older clients or older servers. No protocol transition period is needed. More integration tests to verify these claims remain true are required. I'm unaware of anyone depending on multiprocessing connections between different Python versions. --------- (cherry picked from commit 3ed57e4) Co-authored-by: Christian Heimes <christian@python.org> Signed-off-by: Christian Heimes <christian@python.org> Co-authored-by: Gregory P. Smith [Google] <greg@krypto.org>
joneshf-dd
approved these changes
Dec 18, 2024
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Seems like a pretty straight-forward cherry-pick.
(cherry picked from commit 3ed57e4)
👏 praise: Thanks for linking to the original commit! Made it easier to compare.
Thanks! I cheated and used the cpython cherry-picker tool. |
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bpo-17258:
multiprocessingnow supports stronger HMAC algorithms for inter-process connection authentication rather than only HMAC-MD5.gpshead: I Reworked to be more robust while keeping the idea.
The protocol modification idea remains, but we now take advantage of the message length as an indicator of legacy vs modern protocol version. No more regular expression usage. We now default to HMAC-SHA256, but do so in a way that will be compatible when communicating with older clients or older servers. No protocol transition period is needed.
More integration tests to verify these claims remain true are required. I'm unaware of anyone depending on multiprocessing connections between different Python versions.
(cherry picked from commit 3ed57e4)