..
    Copyright 2020 NXP


.. highlight::shell

.. _desfireCRC:

==========================================================
Test non deletion of desfire CRC module without Features
==========================================================

This tool is used to verify that desfire CRC module cannot be deleted without auth with FEATURE ID
The tool should be compiled with ECKey encryption, and optionally PlatfSCP03 encryption also.
You would need to provide a command line parameter for ECKey key to be used, and an environment variable for your
own Platform SCP03 keys, if required.


.. _configure-eckey-file:

Configuring ECKey key for command line
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

This example takes as a command-line input, the filename in which ECDSA key is stored.
The key should be stored in *.der* (binary) format only. If the available key is in *.pem* format,
it can be converted into binary format using OpenSSL command-line utility. Refer to `OpenSSL Commands
<https://wiki.openssl.org/index.php/Command_Line_Elliptic_Curve_Operations#EC_Private_Key_File_Formats/>`_
for more information on how to convert *.pem* formatted file to *.der* formatted file.


.. _configure-env-for-platfscp:

Configuring Environment for PlatfSCP03 Keys
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

**If you do not wish to use Platform SCP03 encryption, skip to the next step**.

To use your own platform SCP03 keys, refer to :numref:`platfscp-file` :ref:`platfscp-file`
on details on setting up your environment.


Using with PC as host
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

1)  Flash the VCOM binary present in :file:`binaries` directory on to the target board.
#)  Note the VCOM *COMPORT* from device manager.
#)  Build the project ``se05x_setAppletFearures``. Configure the tool with ``SE050_A``, ``SE050_B`` or ``SE050_C``,
    to enable the applet specific features.
#)  Run the executable for desired variant as::

        cd tools
        set EX_SSS_BOOT_SCP03_PATH_ENV=\path\to\platfscp03\keys
        desfire_CRC.exe -file <filename> <COMPORT>

    Where ``EX_SSS_BOOT_SCP03_PATH_ENV`` is set to the path of file containing Platform SCP03 keys as described in :ref:`configure-env-for-platfscp`.

    *COMPORT* is the port obtained from step 2.

    *filename* is the path to file containing ECDSA keypair provisioned at **RESERVED_ID_FEATURE** in binary format as described in :ref:`configure-eckey-file`


Using with iMX-6 as host
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

1)  Build the project ``se05x_setAppletFearures``. Configure the tool with ``SE050_A``, ``SE050_B`` or ``SE050_C``,
    to enable the applet specific features.
#)  Run the executable for desired variant as::

        cd tools
        export EX_SSS_BOOT_SCP03_PATH_ENV=\path\to\platfscp03\keys
        ./desfire_CRC -file <filename>

    Where ``EX_SSS_BOOT_SCP03_PATH_ENV`` is set to the path of file containing Platform SCP03 keys as described in :ref:`configure-env-for-platfscp`.

    *filename* is the path to file containing ECDSA keypair provisioned at **RESERVED_ID_FEATURE** in binary format as described in :ref:`configure-eckey-file`