+/*
+ * Switch to ChaCha20+Poly1305 decryption for incoming records.
+ * cc the engine context
+ * is_client non-zero for a client, zero for a server
+ * prf_id id of hash function for PRF
+ */
+void br_ssl_engine_switch_chapol_in(br_ssl_engine_context *cc,
+ int is_client, int prf_id);
+
+/*
+ * Switch to ChaCha20+Poly1305 encryption for outgoing records.
+ * cc the engine context
+ * is_client non-zero for a client, zero for a server
+ * prf_id id of hash function for PRF
+ */
+void br_ssl_engine_switch_chapol_out(br_ssl_engine_context *cc,
+ int is_client, int prf_id);
+