data encryption

[Trialblazer47]

I wanted to encrypt data to be sent over ble. I am trying to reuse the security file provided with blufi example.

I think the two API blufi_aes_encrypt & blufi_aes_decrypt are to be used to encrypt and decrypt. I tried to make a test code.

first I initalized

Code: Select all

void app_main()
{
  char *input="hello";
  char *out;
  if( security_init() == ESP_FAIL  )
    {
      ESP_LOGI(TAG,"Security init failed.\n");
    }
ESP_LOGI(TAG,"Security done.\n");
aes_encrypt(10, input,5);                       <---- but this keeps crashing  I don't understand its input. 
ESP_LOGI(TAG,"Encrypted : %s \n",input); 
}

I am also thinking where the encryption key set?

I want simple way to encrypt and decrypt data. so please any example would be helpful.

[blekyo]

Hi,
I'm getting the same issue you. Did you you find out how to make it work?

[Trialblazer47]

no than I gave up that idea.

[chegewara]

I dont know why this is not answered yet, since its a simple answer. This is wrong usage:

Code: Select all

aes_encrypt(10, input,5); 

Check this https://github.com/espressif/esp-idf/bl ... /aes.h#L21
and this https://github.com/espressif/esp-idf/bl ... .h#L49-L52

and you will have answers why it crash and where to set encryption key.

[blekyo]

OK thanks, after a time spent looking on the code, I managed to understand how to use the mbedtls aes encryption/decryption