From c0c334e88bffc74a97b1316d0c55cedd4b041ccb Mon Sep 17 00:00:00 2001
From: daurnimator <quae@daurnimator.com>
Date: Tue, 30 Oct 2018 18:09:13 +1100
Subject: Add openssl.extensionSupported()

---
 doc/luaossl.tex |  4 ++++
 src/openssl.c   | 19 +++++++++++++++++++
 2 files changed, 23 insertions(+)

diff --git a/doc/luaossl.tex b/doc/luaossl.tex
index ddfde04..c3e4463 100644
--- a/doc/luaossl.tex
+++ b/doc/luaossl.tex
@@ -250,6 +250,10 @@ name & description \\\hline
 \small{\texttt{SSLEAY\_DIR}} & OpenSSL installation directory description as a string. \\
 \end{ctabular}
 
+\subsubsection[\fn{openssl.extensionSupported}]{\fn{openssl.extensionSupported($ext\_type$)}}
+
+Returns a boolean indicating if the extension $ext\_type$ is handled internally by OpenSSL.
+
 \end{Module}
 
 
diff --git a/src/openssl.c b/src/openssl.c
index d8d9e01..6b6d5cd 100644
--- a/src/openssl.c
+++ b/src/openssl.c
@@ -351,6 +351,10 @@
 #define HAVE_SSL_CTX_USE_SERVERINFO_FILE OPENSSL_PREREQ(1,0,2)
 #endif
 
+#ifndef HAVE_SSL_EXTENSION_SUPPORTED
+#define HAVE_SSL_EXTENSION_SUPPORTED OPENSSL_PREREQ(1,0,2)
+#endif
+
 #ifndef HAVE_SSL_GET0_ALPN_SELECTED
 #define HAVE_SSL_GET0_ALPN_SELECTED HAVE_SSL_CTX_SET_ALPN_PROTOS
 #endif
@@ -2456,8 +2460,23 @@ static int ossl_version(lua_State *L) {
 	return 1;
 } /* ossl_version() */
 
+
+#if HAVE_SSL_EXTENSION_SUPPORTED
+static int ossl_extensionSupported(lua_State *L) {
+	unsigned int ext_type = auxL_checkunsigned(L, 1);
+
+	lua_pushboolean(L, SSL_extension_supported(ext_type));
+
+	return 1;
+} /* ossl_extensionSupported() */
+#endif
+
+
 static const auxL_Reg ossl_globals[] = {
 	{ "version", &ossl_version },
+#if HAVE_SSL_EXTENSION_SUPPORTED
+	{ "extensionSupported", &ossl_extensionSupported },
+#endif
 	{ NULL,      NULL },
 };
 
-- 
cgit v1.2.3-59-g8ed1b