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=============================================================================
Introduction
=============================================================================
OpenSSL is a well-known open source implementation of SSL/TLS protocols.
The core library implements the cryptographic and SSL/TLS functions and
also provides various utility functions. The OpenSSL library is widely used
in variety of security products development as base crypto provider.
(See http://www.openssl.org/ for more information about OpenSSL).
UEFI (Unified Extensible Firmware Interface) is a specification detailing
the interfaces between OS and platform firmware. Several security features
were introduced (e.g. Authenticated Variable Service, Driver Signing, etc)
from UEFI 2.2 (http://www.uefi.org/). These security features highly depend
on the cryptography.
This HOWTO documents OpenSSL building under UEFI/EDKII environment.
=============================================================================
OpenSSL-Version
=============================================================================
EDKII supports building with the latest release of OpenSSL.
The latest official release is OpenSSL-1.1.0g (Released at 2017-Nov-02).
NOTE: Only latest release version was fully validated.
And no guarantees on build & functionality if using other versions.
=============================================================================
HOW to Install OpenSSL for UEFI Building
=============================================================================
OpenSSL repository was added as one submodule of EDKII project.
The user can use the following commands to clone both main EDKII repo and
openssl submodule:
1) Add the "--recursive" flag to the git clone command:
$ git clone --recursive https://github.com/tianocore/edk2
or
2) Manually initialize and update the submodules after the clone operation
on main project:
$ git clone https://github.com/tianocore/edk2
$ git submodule update --init --recursive
And use the following combined commands to pull the remote submodule updates
(e.g. Updating the new supported OpenSSL release tag):
$ git pull --recurse-submodules && \
git submodule update --recursive
=============================================================================
About process_files.pl
=============================================================================
"process_files.pl" is one Perl script which runs the OpenSSL Configure,
then processes the resulting file list into our local OpensslLib.inf and
OpensslLibCrypto.inf.
This only needs to be done once by the maintainer / developer when
updating to a new version of OpenSSL (or changing options, etc.).
Normal users do not need do this, since the results are already stored in
the EDKII git repository for them.
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