OpenSSL's ECDSA implementation does not use Dual_EC_DRBG. You can read about what is actually done to make ECDSA keys here. https://wiki.openssl.org/index.php

OpenSSL's ECDSA implementation does not use Dual_EC_DRBG. You can read about what is actually done to make ECDSA keys here. https://wiki.openssl.org/index.php/Creating_an_OpenSSL_Engine_to_use_indigenous_ECDH_ECDSA_and_HASH_Algorithms https://wiki.openssl.org/index.php/Creating_an_OpenSSL_Engin...