+#ifdef TLSEXT_TYPE_opaque_prf_input
+struct cb_info_st { void *input; size_t len; int ret; };
+struct cb_info_st co1 = { "C", 1, 1 }; /* try to negotiate oqaque PRF input */
+struct cb_info_st co2 = { "C", 1, 2 }; /* insist on oqaque PRF input */
+struct cb_info_st so1 = { "S", 1, 1 }; /* try to negotiate oqaque PRF input */
+struct cb_info_st so2 = { "S", 1, 2 }; /* insist on oqaque PRF input */
+
+int opaque_prf_input_cb(SSL *ssl, void *peerinput, size_t len, void *arg_)
+ {
+ struct cb_info_st *arg = arg_;
+
+ if (arg == NULL)
+ return 1;
+
+ if (!SSL_set_tlsext_opaque_prf_input(ssl, arg->input, arg->len))
+ return 0;
+ return arg->ret;
+ }
+#endif