PN7642 mbedtls_demo – Crash on APP_ECDSA() (mbedtls_ecdsa_sign)

[pberveiller]

Hello,

I'm encountering an issue with the mbedtls_demo project. The program crashes when calling the APP_ECDSA() function, specifically during the mbedtls_ecdsa_sign call.

I am not using the key store, and I'm calling APP_InitMbedCrypto() at the begin (cf FAQ AN13936)

All other functions in the demo are working perfectly.

Do you have any idea what could be causing this?

Best regards,

[pberveiller]

Hello, thank you for you reply.  

I just want to run the example from the PN7642 SDK.

In second time, I will use the keystore .

I share you the init function.

[jimmychan]

What key you are using for ECDSA signing?

[pberveiller]

Hello, I user the demo project included in the SDK of PN7642.

The program crashes  for all keys: 

static const struct

{

mbedtls_ecp_group_id id;

const char *name;

uint16_t keySize;

} ecpInfo[] = {

{

MBEDTLS_ECP_DP_SECP256R1,

"SECP256R1",

256 / 8,

},

{

MBEDTLS_ECP_DP_SECP384R1,

"SECP384R1",

384 / 8,

},

{

MBEDTLS_ECP_DP_BP256R1,

"BP256R1",

256 / 8,

},

{

MBEDTLS_ECP_DP_BP384R1,

"BP384R1",

384 / 8,

}

};

Regards.

[jimmychan]

Please try the key store first.  If you want to use cryptographic operations with the key store you have to initialize it first. Please have a look at PN76_Sys_KeyStore_Init in our mbedTls demo application.