error in mbedtls_ecp_gen_keypair()

[Vishwas Jain]

Hello,

I am using nRF52840, SDK16 & SoftDevice140.

I am integrating pm_init()(Peer Manager) into my project and I am getting error 0xFFFFB180 from mbedtls_ecp_gen_keypair(). I looked out for the problem and find this thread which says there may be a problem of mbed libraries.

I am already using AES-ECB-256 encryption (mbedtls library) in my code. I don't think so but to be sure, can that be a cause of this error?

Kindly help me out!

[Einar Thorsrud]

The reason for mbedtls_ecp_gen_keypair() returning 0xFFFFB180 (= -20096 = -0x4E80 = MBEDTLS_ERR_ECP_FEATURE_UNAVAILABLE) was that no entropy source (RNG) was enabled.