keycache tweaks

[bigbrett]

• Increase default keycache size for SHE mode to accomodate all SHE keys
• Increase default big cache size to facilitate new RSA test
• Adds missing key eviction to RSA test

[Copilot]

Pull request overview

Adjusts wolfHSM’s server key-cache defaults to better support SHE mode and expanded RSA async testing, and updates the RSA async test to proactively free cache resources when intermediate keys are no longer needed.

Changes:

• Increase default WOLFHSM_CFG_SERVER_KEYCACHE_COUNT to 16 when WOLFHSM_CFG_SHE_EXTENSION is enabled (matching SHE’s 0–15 key slots).
• Increase default WOLFHSM_CFG_SERVER_KEYCACHE_BIG_COUNT from 1 to 3 to accommodate larger-key workflows/tests.
• Evict the cached RSA key earlier in whTest_CryptoRsaAsync() after sign/verify to free cache space for subsequent steps.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
wolfhsm/wh_settings.h	Raises default key-cache sizes (conditional for SHE, and larger “big key” cache) to support expected key slot usage and RSA testing needs.
test/wh_test_crypto.c	Adds an explicit mid-test key eviction in the RSA async test to avoid cache pressure before export-key steps.

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[wolfSSL-Fenrir-bot]

Fenrir Automated Review — PR #400

Scan targets checked: wolfhsm-core-bugs, wolfhsm-crypto-bugs, wolfhsm-src

No new issues found in the changed files. ✅