Platform entropy sources only work on Unix and Windows, see MBEDTLS_NO_PLATFORM_ENTROPY in config.h

[AptusBE]

Hi,

I'm trying to include AES256 CTR in the ble_app_template project.

What i've done so far:

.c files:

- Included the files from /components/libraries/crypto

- Included the files from /components/libraries/crypto/backend/mbedtls

- Included the files from /external/mbedtls/library

User include directories:

components/libraries/stack_info

components/libraries/crypto/backend/cc310

components/libraries/crypto/backend/cc310_bl

components/libraries/crypto/backend/cifra

components/libraries/crypto/backend/mbedtls

components/libraries/crypto/backend/micro_ecc

components/libraries/crypto/backend/nrf_hw

components/libraries/crypto/backend/nrf_sw

components/libraries/crypto/backend/oberon

external/mbedtls/include

external/nrf_tls/mbedtls/nrf_crypto/config

The compilation error I have is in the file entropy_poll.c

#error "Platform entropy sources only work on Unix and Windows, see MBEDTLS_NO_PLATFORM_ENTROPY in config.h"

It's something to do with the MBEDTLS_CONFIG_FILE not being set I think? 

external/nrf_tls/mbedtls/nrf_crypto/config has been added as path

 

Anybody who could know what my problem is?

THX! 

Marvin

[Einar Thorsrud]

Hi,

You should use external\nrf_tls\mbedtls\nrf_crypto\config\nrf_crypto_mbedtls_config.h as the configuration file for mbed TLS. That is done by setting the project-wide define MBEDTLS_CONFIG_FILE to "nrf_crypto_mbedtls_config.h".

You should get this out of the box if you copy the configuration from an SDK example that uses nrf_crypto.

[AptusBE]

Hi how can I set the MBEDTLS_CONFIG_FILE myself? I tried searching for it in a crypto example project but this is nowhere defined in the whole project when i search over the whole solution in embedded studio?
Copying the configuration does that mean the sdk_config file?

[Einar Thorsrud]

Hi,

You set it as a preprocessor definition. In SES you select Project -> Options... and then find it as shown in this screenshot: