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[3.15] gh-114905: Test that ssl._create_stdlib_context() rejects check_hostname with CERT_NONE (GH-155509) - #155672
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serhiy-storchaka merged 3 commits intoOct 10, 2026
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…_hostname with CERT_NONE (pythonGH-155509) With PROTOCOL_TLS_CLIENT, which became the default protocol in 3.10, this is an error. With an explicitly specified legacy protocol it used to succeed, silently raising verify_mode to CERT_REQUIRED and ignoring the requested CERT_NONE. No caller of ssl._create_stdlib_context() in the standard library passes check_hostname, so no public API reaches it. (cherry picked from commit 726e485) Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
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With PROTOCOL_TLS_CLIENT, which became the default protocol in 3.10, this is
an error. With an explicitly specified legacy protocol it used to succeed,
silently raising verify_mode to CERT_REQUIRED and ignoring the requested
CERT_NONE.
No caller of ssl._create_stdlib_context() in the standard library passes
check_hostname, so no public API reaches it.
(cherry picked from commit 726e485)
Co-authored-by: Serhiy Storchaka storchaka@gmail.com