Test consistency of cipher max-size macros

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
diff --git a/tests/suites/test_suite_cipher.function b/tests/suites/test_suite_cipher.function
index f842045..01b3f2c 100644
--- a/tests/suites/test_suite_cipher.function
+++ b/tests/suites/test_suite_cipher.function
@@ -63,6 +63,9 @@
                     key_bitlen == 192 ||
                     key_bitlen == 256);
     }
+    TEST_LE_U(key_bitlen, MBEDTLS_MAX_KEY_LENGTH * 8);
+    TEST_LE_U(block_size, MBEDTLS_MAX_BLOCK_LENGTH);
+    TEST_LE_U(iv_size, MBEDTLS_MAX_IV_LENGTH);
 
     if (strstr(info->name, "-ECB") != NULL) {
         TEST_ASSERT(iv_size == 0);