add sanity check on keysize found with ECC point import

[JacobBarthelmeh]

No description provided.

[Copilot]

Pull request overview

Adds stricter validation when importing ECC points to reject malformed encodings (especially compressed points with missing coordinate bytes), and extends the ECC point test suite with new negative test cases.

Changes:

• Add negative tests for malformed compressed points and invalid point-type prefixes.
• Add a sanity check in wc_ecc_import_point_der_ex to ensure the derived coordinate length matches the curve’s expected size.

Reviewed changes

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

File	Description
wolfcrypt/test/test.c	Adds new negative tests to confirm malformed point encodings are rejected with the expected errors.
wolfcrypt/src/ecc.c	Adds a keysize-vs-curve-size sanity check during point import to prevent undersized coordinate parsing.

Comments suppressed due to low confidence (1)

wolfcrypt/test/test.c:1

• These negative import calls reuse point3 and then continue with subsequent imports. If the import routine partially mutates point3 before returning an error, this can make later assertions flaky or order-dependent. Consider reinitializing/clearing point3 (or using a fresh point instance) after each expected-failure import to keep the test isolated and deterministic.

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