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Add build-time option to opt-out of CPU Jitter Entropy #2733
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Add build-time option to opt-out of CPU Jitter Entropy #2733
torben-hansen
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aws:main
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torben-hansen:opt_out_cpu_jitter_entropy
Oct 13, 2025
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Codecov Report❌ Patch coverage is Additional details and impacted files@@ Coverage Diff @@
## main #2733 +/- ##
==========================================
- Coverage 78.93% 78.93% -0.01%
==========================================
Files 675 675
Lines 115273 115283 +10
Branches 16210 16213 +3
==========================================
+ Hits 90994 91001 +7
- Misses 23489 23493 +4
+ Partials 790 789 -1 ☔ View full report in Codecov by Sentry. 🚀 New features to boost your workflow:
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### Description of changes: Prepare v1.62.0 release #### What's Changed * nginx now supports AWS-LC by @samuel40791765 in #2714 * Fix tests that assume X25519 will be negotiated by @alexw91 in #2682 * Fixing a bug in ML-DSA poly_uniform function by @dkostic in #2721 * Migrate integration omnibus by @skmcgrail in #2715 * Delete util/bot directory by @justsmth in #2723 * Don't ignore CMAKE_C_FLAGS w/ MSVC by @justsmth in #2722 * Bump urllib3 from 2.2.3 to 2.5.0 in /tests/ci by @dependabot[bot] in #2551 * Type fix in mldsa by @manastasova in #2308 * Centralize password handling tool-openssl by @kingstjo in #2555 * crypto/pem: replace strncmp with CRYPTO_memcmp to fix -Wstring-compare error by @R3hankhan123 in #2724 * Implement dgst CLI command by @nhatnghiho in #2638 * Add ASN.1 decoding for ML-KEM private keys as seeds by @jakemas in #2707 * Implement genrsa command by @kingstjo in #2535 * Move udiv and sencond tweak calculations to when needed by @nebeid in #2726 * Add null check on RSA key checks by @samuel40791765 in #2727 * Implement workaround for FORTIFY_SOURCE warning with jitterentropy by @skmcgrail in #2728 * Implement coverity suggestions by @skmcgrail in #2730 * Add minimal EC CLI tool implementation by @kingstjo in #2640 * Adding pkeyutl tool to the CLI by @smittals2 in #2575 * Add CI dimensions for legacy AVX512 flags by @smittals2 in #2732 * Fix Libwebsockets CI by @smittals2 in #2737 * Add option ENABLE_SOURCE_MODIFICATION by @justsmth in #2739 * Simple script to build/run tests by @justsmth in #2736 * Add build-time option to opt-out of CPU Jitter Entropy by @torben-hansen in #2733 By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license and the ISC license.
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Issues:
D315146529
Description of changes:
Adds a build-time option
DISABLE_USAGE_OF_CPU_JITTER_ENTROPY
to opt-out of CPU Jitter Entropy. That is, with this option CPU Jitter Entropy will never be configured, the tree-DRBG will not be used. Furthermore, CPU Jitter Entropy will not even be included in any compilation units.When using
DISABLE_USAGE_OF_CPU_JITTER_ENTROPY
we can no longer guarantee two entropy sources because only the Operating System type will be required to be available. rdrand and rndr will be used if supported in any given run-time, but it's not a guarantee.Testing:
New stanza in build script executes a complete build and test with the option.
By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license and the ISC license.