--- google_boringssl/include/openssl/tls1.h	2021-02-03 18:29:04.000000000 -0800
+++ boringssl/include/openssl/tls1.h	2021-02-03 20:24:49.000000000 -0800
@@ -146,6 +146,25 @@
  * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR
  * OTHERWISE.
  */
+/* ====================================================================
+ * Copyright 2020 Apple Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the “Software”),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom
+ * the Software is furnished to do so, subject to the following conditions:
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ * THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
 
 #ifndef OPENSSL_HEADER_TLS1_H
 #define OPENSSL_HEADER_TLS1_H
@@ -197,6 +216,9 @@
 // ExtensionType value from RFC 7301
 #define TLSEXT_TYPE_application_layer_protocol_negotiation 16
 
+// ExtensionType value from RFC 7250
+#define TLSEXT_TYPE_server_certificate_type 20
+
 // ExtensionType value from RFC 7685
 #define TLSEXT_TYPE_padding 21