Create MBEDTLS_SSL_KEYING_MATERIAL_EXPORT option
Add the option MBEDTLS_SSL_KEYING_MATERIAL_EXPORT to mbedtls_config.h
to control if the function mbedtls_ssl_export_keying_material() should
be available. By default, the option is disabled.
This is because the exporter for TLS 1.2 requires client_random and
server_random need to be stored after the handshake is complete.
Signed-off-by: Max Fillinger <max@max-fillinger.net>
diff --git a/include/mbedtls/mbedtls_config.h b/include/mbedtls/mbedtls_config.h
index 2dc475b..ca1486d 100644
--- a/include/mbedtls/mbedtls_config.h
+++ b/include/mbedtls/mbedtls_config.h
@@ -737,6 +737,20 @@
*/
//#define MBEDTLS_SSL_RECORD_SIZE_LIMIT
+/*
+ * \def MBEDTLS_SSL_KEYING_MATERIAL_EXPORT
+ *
+ * When this option is enabled, the client and server can extract additional
+ * shared symmetric keys after an SSL handshake using the function
+ * mbedtls_ssl_export_keying_material().
+ *
+ * The process for deriving the keys is specified in RFC 5705 for TLS 1.2 and
+ * in RFC 8446, Section 7.5, for TLS 1.3.
+ *
+ * Uncomment this macro to enable mbedtls_ssl_export_keying_material().
+ */
+//#define MBEDTLS_SSL_KEYING_MATERIAL_EXPORT
+
/**
* \def MBEDTLS_SSL_RENEGOTIATION
*