nodejs/doc/guides/maintaining-openssl.md

Maintaining OpenSSL

This document describes how to update deps/openssl/.

If you need to provide updates across all active release lines you will currently need to generate three PRs as follows:

• a PR for master which is generated following the instructions below.
• a PR for 14.x following the instructions in the v14.x-staging version of this guide.
• a PR which uses the same commit from the second PR to apply the updates to the openssl source code, with a new commit generated by following steps 2 onwards on the 12.x line. This is necessary because the configuration files have embedded timestamps which lead to merge conflicts if cherry-picked from the second PR.

Use of the quictls/openssl fork

Node.js currently uses the quictls/openssl fork, which closely tracks the main openssl/openssl releases with the addition of APIs to support the QUIC protocol.

Details on the fork, as well as the latest sources, can be found at https://github.com/quictls/openssl.

Branches are used per OpenSSL version (for instance, https://github.com/quictls/openssl/tree/OpenSSL_1_1_1j+quic).

Requirements

• Linux environment.
• perl Only Perl version 5 is tested.
• nasm (https://www.nasm.us/) Version 2.11 or higher is needed.
• GNU as in binutils. Version 2.26 or higher is needed.

0. Check requirements

% perl -v

This is perl 5, version 22, subversion 1 (v5.22.1) built for
x86_64-linux-gnu-thread-multi
(with 60 registered patches, see perl -V for more detail)

% as --version
GNU assembler (GNU Binutils for Ubuntu) 2.26.1
Copyright (C) 2015 Free Software Foundation, Inc.
...
% nasm -v
NASM version 2.11.08

1. Obtain and extract new OpenSSL sources

Get a new source from https://github.com/quictls/openssl/tree/OpenSSL_1_1_1j+quic and copy all files into deps/openssl/openssl. Then add all files and commit them. (The link above, and the branch, will change with each new OpenSSL release).

% git clone https://github.com/quictls/openssl
% cd openssl
% git checkout OpenSSL_1_1_1j+quic
% cd ../node/deps/openssl
% rm -rf openssl
% cp -R ../../../openssl openssl
% rm -rf openssl/.git* openssl/.travis*
% git add --all openssl
% git commit openssl

The commit message can be written as (with the openssl version set to the relevant value):

deps: upgrade openssl sources to OpenSSL_1_1_1j

This updates all sources in deps/openssl/openssl by:
    $ git clone https://github.com/quictls/openssl
    $ cd openssl
    $ git checkout OpenSSL_1_1_1j+quic
    $ cd ../node/deps/openssl
    $ rm -rf openssl
    $ cp -R ../openssl openssl
    $ rm -rf openssl/.git* openssl/.travis*
    $ git add --all openssl
    $ git commit openssl

2. Execute make in deps/openssl/config directory

Use make to regenerate all platform dependent files in deps/openssl/config/archs/:

# On non-Linux machines
% make gen-openssl

# On Linux machines
% make -C deps/openssl/config

3. Check diffs

Check diffs to ensure updates are right. Even if there are no updates in openssl sources, buildinf.h files will be updated because they have timestamp data in them.

% git diff -- deps/openssl

Note: On Windows, OpenSSL Configure generates a makefile that can be used for the nmake command. The make command in step 2 (above) uses Makefile_VC-WIN64A and Makefile_VC-WIN32 that are manually created. When source files or build options are updated in Windows, it needs to change these two Makefiles by hand. If you are not sure, please ask @shigeki for details.

4. Commit and make test

Update all architecture dependent files. Do not forget to git add or remove files if they are changed before committing:

% git add deps/openssl/config/archs
% git add deps/openssl/openssl/include/crypto/bn_conf.h
% git add deps/openssl/openssl/include/crypto/dso_conf.h
% git add deps/openssl/openssl/include/openssl/opensslconf.h
% git commit

The commit message can be written as (with the openssl version set to the relevant value):

 deps: update archs files for OpenSSL-1.1.1

 After an OpenSSL source update, all the config files need to be
 regenerated and committed by:
    $ make -C deps/openssl/config
    $ git add deps/openssl/config/archs
    $ git add deps/openssl/openssl/include/crypto/bn_conf.h
    $ git add deps/openssl/openssl/include/crypto/dso_conf.h
    $ git add deps/openssl/openssl/include/openssl/opensslconf.h
    $ git commit

Finally, build Node.js and run the tests.