ESP32: RSA, SHA fixes

[bugadani]

Fixes #5584 and applies #5443 for ESP32 as well

Changelog

esp-hal/SHA

• Fixed: ESP32 implementation no longer powers down the SHA accelerator while in use
• Fixed: ESP32 no longer tries to use the hardware accelerator when it's held by another SHA operation.

esp-hal/RSA

• Fixed: ESP32 now correctly disables its interrups before disabling the RSA accelerator

[bugadani]

/hil full --test crypto

[bugadani]

I will reorganize the tests in a later PR to prevent similar issues, this PR is minimal for backporting reasons.

[github-actions]

Triggered full HIL run for #5592.

Run: https://github.com/esp-rs/esp-hal/actions/runs/26277245978

Status update: ❌ HIL (full) run failed (conclusion: failure).

[Copilot]

Pull request overview

This PR addresses incorrect multi-block SHA digests on ESP32 by ensuring the SHA peripheral is not powered down between work-queue operations when a digest context relies on the hardware’s internal state (since ESP32 can’t restore saved hash state). It also adjusts the SHA HIL test to avoid holding the SHA peripheral resources in a way that could mask the bug.

Changes:

• ESP32: introduce an Esp32Hasher wrapper so a hardware-backed context holds a GenericPeripheralGuard to keep SHA powered while the context is alive.
• ESP32: update ShaContext to use Esp32Hasher (hardware vs software fallback) and gate update/finalize accordingly.
• HIL test: drop the Sha driver from the test Context before starting a ShaBackend, allowing the backend to manage peripheral resources.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
esp-hal/src/sha.rs	Adds an ESP32-specific hasher wrapper that keeps the SHA peripheral clock enabled for hardware-backed contexts to preserve internal hash state across operations.
hil-test/src/bin/crypto/sha.rs	Drops the Sha driver in the interleaving test to ensure the backend can release/acquire SHA resources as intended during the test.

[Copilot]

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

[Copilot]

Pull request overview

Copilot reviewed 3 out of 3 changed files in this pull request and generated 3 comments.

[bugadani]

/hil esp32 --test crypto

[github-actions]

Triggered HIL run for #5592 (chips: esp32).

Run: https://github.com/esp-rs/esp-hal/actions/runs/26443574290

Status update: ✅ HIL (per-chip) run succeeded.

[MabezDev]

Thanks!

[github-actions]

Created backport PR for esp-hal-1.1.x:

• [Backport esp-hal-1.1.x] ESP32: RSA, SHA fixes #5607 with remaining conflicts!

Please cherry-pick the changes locally and resolve any conflicts.

git fetch origin backport-5592-to-esp-hal-1.1.x
git worktree add --checkout .worktree/backport-5592-to-esp-hal-1.1.x backport-5592-to-esp-hal-1.1.x
cd .worktree/backport-5592-to-esp-hal-1.1.x
git reset --hard HEAD^
git cherry-pick -x 72d44d0721677f07b35bcdcb716943f56e7b66f6
git push --force-with-lease