Getting -0x34 while calling "mbedtls_ctr_drbg_seed" function for RSA Encryption.

[Sakshi_0806]

Hello,

I am facing issue while initialising seed by calling "mbedtls_ctr_drbg_seed" function I am getting -0x34 error and when I analysis this I got to know that I have to enable entropy source.

How can i enable entropy source and is nordic supports RSA-2048 encryption? 

I am using ncs-2.6.0 version

Board: nrf52832

[Einar Thorsrud]

Hi,

How can i enable entropy source

On the nRF52 series devices other than nRF52840 you need to add CONFIG_ENTROPY_GENERATOR=y.

is nordic supports RSA-2048 encryption? 

Yes. On the nRF52832 there is no HW accelleration, but it is supported via software libraries. See the Crypto: RSA sample for an RSA example.

[Sakshi_0806]

In RSA library PSA functions has been used If I want to use mbedtls functions then what I need to do?

[Einar Thorsrud]

Hi,

It is also possible to use mbeed TLS directly if you eable legacy crypto support. You also need to enable RSA specificaly for legacy, as described under RSA configurations.