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 : Luka Filipovic
- Date : Feb 2021.
- Type : I2C type
This application is showcasing basic functionality of 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 deleteing 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.PlugnTrust
plugntrust_cfg_setupConfig Object Initialization function.
void plugntrust_cfg_setup ( plugntrust_cfg_t *cfg );plugntrust_initInitialization function.
err_t plugntrust_init ( plugntrust_t *ctx, plugntrust_cfg_t *cfg );plugntrust_default_cfgClick Default Configuration function.
err_t plugntrust_default_cfg ( plugntrust_t *ctx );plugntrust_apdu_transferWrite-Read frame data function.
err_t plugntrust_apdu_transfer ( plugntrust_t *ctx, plugntrust_frame_data_t *frame_data );plugntrust_select_card_managerSelect card manager.
err_t plugntrust_select_card_manager ( plugntrust_t *ctx, uint8_t rsp, uint8_t *cardmanager_rsp, uint8_t *cardmanager_rsp_len );plugntrust_select_appletSelects Clicks Applet and returns info that device sends back to host.
err_t plugntrust_select_applet ( plugntrust_t *ctx, uint8_t ns_encode, plugntrust_version_info_t *ver_info );At the start it sets comunication interface from default configuration[I2C]. Reads indetifing data from device, and then selects Card manager and applet. After that it reads free presistant 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. Thtas followed up with creating binary object and 'MikroE' data is wrriten in it. Then its checked it object is created, and reads data back, in the end its deleted and checked if it still exists. Finally it creates 128AES key (16bytes), and then it encrypts 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. */
plugntrust_cfg_t plugntrust_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.
plugntrust_cfg_setup( &plugntrust_cfg );
PLUGNTRUST_MAP_MIKROBUS( plugntrust_cfg, MIKROBUS_1 );
err_t init_flag = plugntrust_init( &plugntrust, &plugntrust_cfg );
if ( init_flag == I2C_MASTER_ERROR )
{
log_error( &logger, " Application Init Error. " );
log_info( &logger, " Please, run program again... " );
for ( ; ; );
}
frame_data.apdu = &apdu_data;
plugntrust_default_cfg ( &plugntrust );
if ( PLUGNTRUST_INTERFACE_ISO14443 == plugntrust.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 and logs it. Then creates AES key and encrypts that random data with it, and then decrypts it. In the end it deletes both AES key object and binary object thats created at the start of 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 = 0xBBBBBBBBul;
static uint32_t aes_id = 0xCCCCCCCCul;
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 ( PLUGNTRUST_OK == plugntrust_get_random_numbers( &plugntrust, 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 ( PLUGNTRUST_OBJECT_DOESNT_EXIST == plugntrust_check_object_exist( &plugntrust, binary_id ) )
{
log_printf( &logger, " Write random data to binary object...\r\n" );
if ( PLUGNTRUST_OK != plugntrust_write_binary_object( &plugntrust, 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 ( PLUGNTRUST_OBJECT_DOES_EXISTS == plugntrust_check_object_exist( &plugntrust, binary_id ) )
{
if ( PLUGNTRUST_OK == plugntrust_read_object( &plugntrust, 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 ( PLUGNTRUST_OK == cipher_data_with_aes_key( aes_id, PLUGNTRUST_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 ( PLUGNTRUST_OK == cipher_data_with_aes_key( aes_id, PLUGNTRUST_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 ( ( PLUGNTRUST_OK != plugntrust_delete_object( &plugntrust, binary_id ) ) || ( PLUGNTRUST_OK != plugntrust_delete_object( &plugntrust, 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 informations and explanations 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.