Fix bug in exercise_mac_key that almost always broke the SIGN case
That case isn't used in the test suite yet.
diff --git a/tests/suites/test_suite_psa_crypto.function b/tests/suites/test_suite_psa_crypto.function
index e9efb3a..37d6aca 100644
--- a/tests/suites/test_suite_psa_crypto.function
+++ b/tests/suites/test_suite_psa_crypto.function
@@ -143,7 +143,7 @@
TEST_ASSERT( psa_mac_update( &operation,
input, sizeof( input ) ) == PSA_SUCCESS );
TEST_ASSERT( psa_mac_sign_finish( &operation,
- mac, sizeof( input ),
+ mac, sizeof( mac ),
&mac_length ) == PSA_SUCCESS );
}