Add some API calling order documentation
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
diff --git a/include/mbedtls/ccm.h b/include/mbedtls/ccm.h
index f89ddc2..c4fc6b5 100644
--- a/include/mbedtls/ccm.h
+++ b/include/mbedtls/ccm.h
@@ -297,6 +297,11 @@
* \brief This function starts a CCM encryption or decryption
* operation.
*
+ * This function and mbedtls_ccm_set_lengths() must be called
+ * before calling mbedtls_ccm_update_ad() or
+ * mbedtls_ccm_update(). This function can be called before
+ * or after mbedtls_ccm_set_lengths().
+ *
* \note This function is not implemented in Mbed TLS yet.
*
* \param ctx The CCM context. This must be initialized.
@@ -325,6 +330,11 @@
* and additional data for a CCM encryption or decryption
* operation.
*
+ * This function and mbedtls_ccm_starts() must be called
+ * before calling mbedtls_ccm_update_ad() or
+ * mbedtls_ccm_update(). This function can be called before
+ * or after mbedtls_ccm_starts().
+ *
* \note This function is not implemented in Mbed TLS yet.
*
* \param ctx The CCM context. This must be initialized.