Apply pubkey and signature constraints in vici plugin

src/libstrongswan/credentials/auth_cfg.h

@@ -181,6 +181,13 @@ struct auth_cfg_t {
 	 */
 	void (*add)(auth_cfg_t *this, auth_rule_t rule, ...);
 
+	/**
+	 * Add public key and signature scheme constraints to the set.
+	 *
+	 * @param constraints	constraints string (e.g. "rsa-sha384")
+	 */
+	void (*add_pubkey_constraints)(auth_cfg_t *this, char *constraints);
+
 	/**
 	 * Get a rule value.
 	 *