-EC_GROUP *secp256k1 = NULL;
-EC_GROUP *secp384r1 = NULL;
-EC_GROUP *secp521r1 = NULL;
-
-// TODO: proper KDF
-static void *kdf(const void *in, size_t inlen, void *out, size_t *outlen) {
- memcpy(out, in, inlen);
- *outlen = inlen;
- return out;
-}
-