SE051 Plug n Trust Click demo application is developed using the NECTO Studio, ensuring compatibility with mikroSDK's open-source libraries and tools. Designed for plug-and-play implementation and testing, the demo is fully compatible with all development, starter, and mikromedia boards featuring a mikroBUS™ socket.
- Author : Stefan Filipovic
- Date : Aug 2022.
- Type : I2C type
This application is showcasing basic functionality of SE051 Plug&Trust Click board. It gets identify data from device, selects card manager and applet. Then checks free memory, reads all objects and deletes not reserved ones. After that showcases a few of functionality: Generating random data, Creating, reading and deleting binary objects, Creating AES symmetrical key and cipher with it; In the end it is showcasing funcionality in the endless loop.
- MikroSDK.Board
- MikroSDK.Log
- Click.SE051PlugnTrust
se051plugntrust_cfg_setupConfig Object Initialization function.
void se051plugntrust_cfg_setup ( se051plugntrust_cfg_t *cfg );se051plugntrust_initInitialization function.
err_t se051plugntrust_init ( se051plugntrust_t *ctx, se051plugntrust_cfg_t *cfg );se051plugntrust_apdu_writeThis function writes a @b frame_data to device.
err_t se051plugntrust_apdu_write ( se051plugntrust_t *ctx, se051plugntrust_frame_data_t *frame_data );se051plugntrust_apdu_readThis function reads a @b frame_data from device.
err_t se051plugntrust_apdu_read ( se051plugntrust_t *ctx, se051plugntrust_frame_data_t *frame_data );se051plugntrust_apdu_transferThis function writes a @b frame_data and then reads return data from device and stores it in @b frame_data.
err_t se051plugntrust_apdu_transfer ( se051plugntrust_t *ctx, se051plugntrust_frame_data_t *frame_data );At the start it sets comunication interface to I2C and resets the chip, reads identifying data from device, and then selects card manager and applet. After that it reads free persistent memory, reads all objects and deletes objects that are not reserved by the Applet. Then it generates 2 byte of random data, and gets the version information from the Applet. That's followed up with creating binary object with 'MikroE' data inside. Then it checks if object is created and reads data back. After that, the object is deleted and it's checked if it still exists. Finally it creates 128AES key (16bytes), encrypts it and then decrypts data with that key, and in the end it deletes that key object.
void application_init ( void )
{
log_cfg_t log_cfg; /**< Logger config object. */
se051plugntrust_cfg_t se051plugntrust_cfg; /**< Click config object. */
/**
* Logger initialization.
* Default baud rate: 115200
* Default log level: LOG_LEVEL_DEBUG
* @note If USB_UART_RX and USB_UART_TX
* are defined as HAL_PIN_NC, you will
* need to define them manually for log to work.
* See @b LOG_MAP_USB_UART macro definition for detailed explanation.
*/
LOG_MAP_USB_UART( log_cfg );
log_init( &logger, &log_cfg );
log_info( &logger, " Application Init " );
// Click initialization.
se051plugntrust_cfg_setup( &se051plugntrust_cfg );
SE051PLUGNTRUST_MAP_MIKROBUS( se051plugntrust_cfg, MIKROBUS_1 );
if ( I2C_MASTER_ERROR == se051plugntrust_init( &se051plugntrust, &se051plugntrust_cfg ) )
{
log_error( &logger, " Communication init." );
for ( ; ; );
}
frame_data.apdu = &apdu_data;
se051plugntrust.interface = SE051PLUGNTRUST_INTERFACE_I2C;
se051plugntrust_reset( &se051plugntrust );
if ( SE051PLUGNTRUST_INTERFACE_ISO14443 == se051plugntrust.interface )
{
log_info( &logger, " ISO14443 Interface active..." );
for ( ; ; );
}
soft_reset( );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
get_data_identify( );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
select_card_manger( );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
select_applet( );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
check_free_memory( );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
list_and_delete_objects( );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
get_random( );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
read_uid_object( );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
get_version( );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
create_check_delete( );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
aes_cipher( );
log_info( &logger, " Application Task " );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
}It generates 16bytes of data, writes it in binary object and then reads it back and displays on the USB UART. Then creates AES key and encrypts that generated data with it, and then decrypts it. In the end it deletes both AES key object and binary object that's created at the start of the task.
void application_task ( void )
{
#define DATA_LEN 16
static uint8_t aes_value[ DATA_LEN ] = { 0x40, 0x41, 0x42, 0x43,0x44, 0x45, 0x46, 0x47,
0x48, 0x49, 0x4A, 0x4B,0x4C, 0x4D, 0x4E, 0x4F };
static uint32_t binary_id = 0xBBBBBBBB;
static uint32_t aes_id = 0xCCCCCCCC;
uint8_t random_data[ DATA_LEN ] = { 0 };
uint8_t read_data[ DATA_LEN ] = { 0 };
uint8_t encrypted_data[ DATA_LEN ] = { 0 };
uint32_t read_len = DATA_LEN;
if ( SE051PLUGNTRUST_OK == se051plugntrust_get_random_numbers( &se051plugntrust, random_data, DATA_LEN ) )
{
log_printf( &logger, " > Generated random data: 0x" );
log_buf_hex( random_data, DATA_LEN );
log_printf( &logger, "\r\n" );
}
else
{
log_error( &logger, " Random" );
}
Delay_ms ( 1000 );
Delay_ms ( 1000 );
if ( SE051PLUGNTRUST_OBJECT_DOESNT_EXIST == se051plugntrust_check_object_exist( &se051plugntrust, binary_id ) )
{
log_printf( &logger, " Write random data to binary object...\r\n" );
if ( SE051PLUGNTRUST_OK != se051plugntrust_write_binary_object( &se051plugntrust, binary_id,
0, DATA_LEN, random_data ) )
{
log_error( &logger, " Write Binary" );
}
else
{
log_info( &logger, " Status OK" );
}
}
else
{
log_error( &logger, " Binary object already exist" );
}
Delay_ms ( 1000 );
Delay_ms ( 1000 );
if ( SE051PLUGNTRUST_OBJECT_DOES_EXISTS == se051plugntrust_check_object_exist( &se051plugntrust, binary_id ) )
{
if ( SE051PLUGNTRUST_OK == se051plugntrust_read_object( &se051plugntrust, binary_id, 0, 0,
read_data, &read_len ) )
{
log_printf( &logger, " > Read data from binary object: 0x" );
log_buf_hex( read_data, read_len );
log_printf( &logger, "\r\n" );
}
else
{
log_error( &logger, " Read binray object" );
}
}
else
{
log_error( &logger, " Binary object doesn't exist" );
}
Delay_ms ( 1000 );
Delay_ms ( 1000 );
log_printf( &logger, " Create AES key...\r\n" );
create_128_aes_key( aes_id, aes_value );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
if ( SE051PLUGNTRUST_OK == cipher_data_with_aes_key( aes_id, SE051PLUGNTRUST_P2_ENCRYPT_ONESHOT,
read_data, encrypted_data ) )
{
log_printf( &logger, " > Encrypted data: 0x" );
log_buf_hex( encrypted_data, DATA_LEN );
log_printf( &logger, "\r\n" );
}
else
{
log_error( &logger, " Encrypting data" );
}
Delay_ms ( 1000 );
Delay_ms ( 1000 );
if ( SE051PLUGNTRUST_OK == cipher_data_with_aes_key( aes_id, SE051PLUGNTRUST_P2_DECRYPT_ONESHOT,
encrypted_data, read_data ) )
{
log_printf( &logger, " > Decrypted data: 0x" );
log_buf_hex( read_data, DATA_LEN );
log_printf( &logger, "\r\n" );
}
else
{
log_error( &logger, " Decrypting data" );
}
Delay_ms ( 1000 );
Delay_ms ( 1000 );
log_printf( &logger, " Delete Binary and AES object...\r\n" );
if ( ( SE051PLUGNTRUST_OK != se051plugntrust_delete_object( &se051plugntrust, binary_id ) ) ||
( SE051PLUGNTRUST_OK != se051plugntrust_delete_object( &se051plugntrust, aes_id ) ) )
{
log_error( &logger, " Deleting objects" );
}
log_printf( &logger, "*****************************************************************************\r\n" );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
Delay_ms ( 1000 );
}For more information refer to documents from NXP: AN12413 and UM11225.
This Click board can be interfaced and monitored in two ways:
- Application Output - Use the "Application Output" window in Debug mode for real-time data monitoring. Set it up properly by following this tutorial.
- UART Terminal - Monitor data via the UART Terminal using a USB to UART converter. For detailed instructions, check out this tutorial.
The complete application code and a ready-to-use project are available through the NECTO Studio Package Manager for direct installation in the NECTO Studio. The application code can also be found on the MIKROE GitHub account.