Method generateValidKeyPair

src/modules/ble/fastpair_crypto.cpp:32–48

}

bool FastPairCrypto::generateValidKeyPair(uint8_t *public_key, size_t *pub_len) {
    int ret = mbedtls_ecdh_gen_public(&grp, &d, &Q, mbedtls_ctr_drbg_random, &ctr_drbg);
    if (ret != 0) { return false; }

    if (*pub_len >= 65) {
        size_t olen;
        ret = mbedtls_ecp_point_write_binary(
            &grp, &Q, MBEDTLS_ECP_PF_UNCOMPRESSED, &olen, public_key, *pub_len
        );
        if (ret == 0 && olen == 65) {
            *pub_len = 65;
            return true;
        }
    }

    return false;
}

bool FastPairCrypto::generateEphemeralKeyPair(uint8_t *public_key, uint8_t *private_key) {
    mbedtls_mpi priv;