psa: use static key slot buffers to store key material #64
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Checked the diff with the upstream PR.
This commit takes only relevant changes of PR Mbed-TLS/mbedtls#9448 that was merged in upstream Mbed TLS in the LTS branch "mbedtls-3.6". Since the original PR was made of several commits, but most of them were only affecting tests cases (not used in Zephyr), only changes belonging to the "include" and "library" folders were included here. == IMPORTANT == Changes introduced in this commit will be automatically part of Mbed TLS release 3.6.3, so by the time Zephyr's Mbed TLS fork repo is bumbed to that official release, this commit MUST be discarded. This commit introduces the possibility to use static key slot buffers in the PSA core instead of dynamically allocating them when needed. This helps reducing heap memory usage as well as potentially removing heap management ROM code if heap is not used anywhere else in the Zephyr application. Signed-off-by: Valerio Setti <[email protected]>
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As discussed in the Release meeting today, we want to consider the deprecation of Tinycrypt a release blocker item for 4.0. That would mean Part1, Part2, and the mbedTLS changes would all need to be merged in. @tomi-font @ithinuel any objection to this course of action? The point was raised that Tinycrypt has been "just about to be deprecated" for 5 years now, but never seems to make it. We'd like to make it happen now. |
No objection. I'm happy we proceed this way. |
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Since 4.0 is out, can we please wmerge this? In this way I can move zephyrproject-rtos/zephyr#80368 (and zephyrproject-rtos/zephyr#79931 consequently) forward. |
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This PR is the relevant part of the PR 9448 that was merged in mainline Mbed TLS in LTS branch "mbedtls-3.6". Changes included in this PR will be automatically included in 3.6.3, so by the time Zephyr's Mbed TLS fork repo is bumbed to that official release, this commit MUST be discarded.
This PR introduces the possibility to use static key slot buffers in the PSA core instead of dynamically allocating them when needed. This helps reducing heap memory usage as well as potentially removing heap management ROM code if heap is not used anywhere else in the Zephyr application.