+
+void blake2s_param_init(BLAKE2S_PARAM *P);
+void blake2s_param_set_digest_length(BLAKE2S_PARAM *P, uint8_t outlen);
+void blake2s_param_set_key_length(BLAKE2S_PARAM *P, uint8_t keylen);
+void blake2s_param_set_personal(BLAKE2S_PARAM *P, const uint8_t *personal, size_t length);
+void blake2s_param_set_salt(BLAKE2S_PARAM *P, const uint8_t *salt, size_t length);