xtest: Add Application Secrets TA testsuite#815
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The suite covers seal/unseal round-trips at 1-byte and maximum plaintext sizes, randomized sealing (IV uniqueness), rejection of malformed and tampered ciphertext, and binding to the caller's login identity. Sealing overhead is measured at runtime via a one-byte probe seal instead of being hardcoded, so the max-plaintext subcase remains valid across changes to TA-side overhead. The same probe also detects TA absence: TEEC_ERROR_ITEM_NOT_FOUND from the probe skips the suite, any other probe error fails it. A subcase that seals under one uid and unseals under another uid is not included because that would require external orchestration outside this test case. The analogous gid subcase is present, but skipped at runtime when the caller is member of only one group. The login-method-mismatch subcase still verifies that login type is part of the binding. Signed-off-by: Tuomas Salokanto <tuomas.salokanto@vaisala.com>
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Related optee_os PR: OP-TEE/optee_os#7769
Addresses issue: OP-TEE/optee_os#7768