I am trying to write and code of aes encryption and decryption using ccm mode for my application on nrf52832 controller. I have went through some example on Github for the same and took the function from there the git link is "https://github.com/NordicPlayground/nrf52-esb-ccm-example.git" form this in the common folder took files og ccm_crypt.c and ccm_crypt.h and integrated with my project my project code is.
int main(void)
{
/* Initialise the system clock */
InitSysClock();
/* Initialise the Gpios */
InitSysGpios();
// Initialize the CCM
ccm_crypt_init();
// Prepare the pair request
ccm_pair_request_packet_t request_out;
ccm_passkey_t passkey = {0}; // Replace with your passkey
uint32_t result = ccm_crypt_pair_request_prepare(passkey, &request_out);
if (result != CCM_CRYPT_SUCCESS)
{
printf("Error preparing pair request\n");
while(1);
}
// Accept the pair request
result = ccm_crypt_pair_request_accept(passkey, &request_out);
if (result != CCM_CRYPT_SUCCESS)
{
printf("Error accepting pair request\n");
while(1);
}
uint8_t plaintext[16] = "This is a test!"; // Your 16-byte plaintext
uint8_t encrypted_text[20]; // Encrypted text (16-byte ciphertext + 4-byte MAC)
uint8_t decrypted_text[16]; // Decrypted text (16-byte plaintext)
// Encrypt a packet
result = ccm_crypt_packet_encrypt(plaintext, sizeof(plaintext), encrypted_text);
if (result != CCM_CRYPT_SUCCESS)
{
printf("Error encrypting packet\n");
while(1);
}
// Print the plaintext and the encrypted text
print_data("Plaintext", plaintext, sizeof(plaintext));
print_data("Encrypted text", encrypted_text, sizeof(encrypted_text));
// Now let's decrypt the encrypted text
result = ccm_crypt_packet_decrypt(encrypted_text, sizeof(encrypted_text) - 1, decrypted_text);
if (result == CCM_CRYPT_SUCCESS)
{
// Print the decrypted text
print_data("Decrypted text", decrypted_text, sizeof(decrypted_text));
}
else
{
while(1);
}
return 0;
}
Now when I amtrying to execute the code it is getting stuck ccm_crypt_pair_request_prepare(passkey, &request_out); my preduction it is not able to generate the key. Can you Help me with this?
