-int ECDH_compute_key(void *out, size_t outlen, const EC_POINT *pub_key, EC_KEY *eckey,
- void *(*KDF)(void *in, size_t inlen, void *out, size_t outlen))
+int ECDH_compute_key(void *out, size_t outlen, const EC_POINT *pub_key,
+ EC_KEY *eckey,
+ void *(*KDF) (const void *in, size_t inlen, void *out,
+ size_t *outlen))