[CP] Fix hostname validation with OpenSSL/QuicTLS (#6274) - #6275
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Guillaume Hetier (guhetier) merged 1 commit intoAug 28, 2026
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## Description Addresses https://microsoft.visualstudio.com/OS/_workitems/edit/62840655 When using the OpenSSL or QuicTLS backends, the target hostname was not properly validated against the server certificate. `X509_VERIFY_PARAM_set1_host` and `X509_VERIFY_PARAM_set1_ip_asc` are now properly called. The server name provided to `ConnectionStart` is used for the validation, if it isn't provided, the target IP address is used instead. ## Testing CI. Manual testing validating a connection succeeds and fail as expected against various certificate matching or not the hostname and/or IP. New automated test cases will be added in a follow up. ## Documentation N/A --------- Copilot-Session: 25e9a5bc-61c1-44b4-9221-b75067ecca54
Guillaume Hetier (guhetier)
marked this pull request as ready for review
August 28, 2026 20:08
Anthony Rossi (anrossi)
approved these changes
Aug 28, 2026
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I reviewed the core, inc, and platform changes, excluding test code. Looks good to me
Codecov Report❌ Patch coverage is
❌ Your patch check has failed because the patch coverage (50.00%) is below the target coverage (80.00%). You can increase the patch coverage or adjust the target coverage. Additional details and impacted files@@ Coverage Diff @@
## release/2.6 #6275 +/- ##
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+ Coverage 85.25% 85.39% +0.14%
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Files 60 60
Lines 18972 18984 +12
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+ Hits 16175 16212 +37
+ Misses 2797 2772 -25 ☔ View full report in Codecov by Harness. 🚀 New features to boost your workflow:
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Guillaume Hetier (guhetier)
merged commit Aug 28, 2026
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491 of 492 checks passed
Guillaume Hetier (guhetier)
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August 28, 2026 21:19
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Description
Addresses https://microsoft.visualstudio.com/OS/_workitems/edit/62840655
When using the OpenSSL or QuicTLS backends, the target hostname was not properly validated against the server certificate.
X509_VERIFY_PARAM_set1_hostandX509_VERIFY_PARAM_set1_ip_ascare now properly called.The server name provided to
ConnectionStartis used for the validation, if it isn't provided, the target IP address is used instead.Testing
CI. Manual testing validating a connection succeeds and fail as expected against various certificate matching or not the hostname and/or IP.
New automated test cases will be added in a follow up.
Documentation
N/A