ECDH- NID_X9_62_prime256v1 - EVP_RAND_generate()

Hi, I am implementing ECDH- Group19 (NID_X9_62_prime256v1). I followed the below sequence. 1. ecdh_group = EC_GROUP_new_by_curve_name(NID_X9_62_prime256v1); // NID_X9_62_prime256v1 or NID_secp256k1 2. ecdh_keys = EC_KEY_new(); 3. ret = EC_KEY_set_group(ecdh_keys, ecdh_group); 4. re

ECDH- NID_X9_62_prime256v1 - EVP_RAND_instantiate()

Hi, I am implementing ECDH- Group19 (NID_X9_62_prime256v1). I followed the below sequence. 1. ecdh_group = EC_GROUP_new_by_curve_name(NID_X9_62_prime256v1); // NID_X9_62_prime256v1 or NID_secp256k1 2. ecdh_keys = EC_KEY_new(); 3. ret = EC_KEY_set_group(ecdh_keys, ecdh_group); 4. re