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Fix HKDF on big-endian#5478

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goatgoose merged 1 commit intoaws:mainfrom
sertonix:big-endian
Aug 26, 2025
Merged

Fix HKDF on big-endian#5478
goatgoose merged 1 commit intoaws:mainfrom
sertonix:big-endian

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@sertonix sertonix commented Aug 23, 2025

Release Summary:

Resolved issues:

resolves #4097

Description of changes:

Using the "first" byte of a uint32_t is endian dependent. Casting curr_round to a single byte type fist makes sure endianes doesn't have any affect.

Call-outs:

I am not entirely sure if there should may be a & 0xff before the cast.

Testing:

This has been tested on alpine linux s390x and ppc by running the unit tests.

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

Using the "first" byte of a uint32_t is endian dependent.

Fixes 004b05e Add support for HKDF
Fixes aws#4097
@lrstewart lrstewart requested a review from goatgoose August 25, 2025 21:34
@goatgoose goatgoose added this pull request to the merge queue Aug 26, 2025
Merged via the queue into aws:main with commit a214bcb Aug 26, 2025
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@sertonix sertonix deleted the big-endian branch January 7, 2026 17:31
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Some tests errors on Darwin PowerPC: 95% tests passed, 12 tests failed out of 239

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