docs(security): update info on use of OpenSSL 3.0
OpenSSL 3.0 is a pre-requisite since v2.7 and can be installed
on the operating system by updating the previous version.
However, this may not be convenient for everyone, as some may
want to keep their previous versions of OpenSSL.
This update on the docs shows that there is an alternative to
install OpenSSL on the system by using a local build of
OpenSSL 3.0 and pointing both the build and run commands to
that build.
Signed-off-by: Juan Pablo Conde <juanpablo.conde@arm.com>
Change-Id: Ib9ad9ee5c333f7b04e2747ae02433aa66e6397f3
diff --git a/docs/getting_started/tools-build.rst b/docs/getting_started/tools-build.rst
index c050f58..daf7e06 100644
--- a/docs/getting_started/tools-build.rst
+++ b/docs/getting_started/tools-build.rst
@@ -1,6 +1,16 @@
Building Supporting Tools
=========================
+.. note::
+
+ OpenSSL 3.0 is needed in order to build the tools. A custom installation
+ can be used if not updating the OpenSSL version on the OS. In order to do
+ this, use the ``OPENSSL_DIR`` variable after the ``make`` command to
+ indicate the location of the custom OpenSSL build. Then, to run the tools,
+ use the ``LD_LIBRARY_PATH`` to indicate the location of the built
+ libraries. More info about ``OPENSSL_DIR`` can be found at
+ :ref:`Build Options`.
+
Building and using the FIP tool
-------------------------------
@@ -164,4 +174,4 @@
--------------
-*Copyright (c) 2019, Arm Limited. All rights reserved.*
+*Copyright (c) 2019-2022, Arm Limited. All rights reserved.*