Use ConstantCompare in EchCheckAcceptance#9900
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Pull request overview
This PR switches ECH acceptance confirmation comparison to a constant-time routine to reduce timing side-channels in TLS 1.3 ECH processing.
Changes:
- Replaced
XMEMCMPwithConstantCompareinEchCheckAcceptancewhen validating the last 8 bytes of the accept confirmation.
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douzzer
approved these changes
Mar 7, 2026
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