+
+u_char *
+kex_dh_hash(char *, char *, char *, int, char *, int, u_char *, int,
+ BIGNUM *, BIGNUM *, BIGNUM *);
+u_char *
+kexgex_hash(char *, char *, char *, int, char *, int, u_char *, int,
+ int, int, int, BIGNUM *, BIGNUM *, BIGNUM *, BIGNUM *, BIGNUM *);