FreeBSD maintainer's guide to OpenSSL
	    =====================================

    These instructions assume you have a clone of the FreeBSD git repo
    main branch in src/freebsd/main, and will store vendor trees under
    src/freebsd/vendor/. In addition, this assumes there is a "freebsd"
    origin pointing to git(repo).freebsd.org/src.git.

01) Switch to the vendor branch:

    $ cd src/freebsd/main
    $ git worktree add ../vendor/openssl-X.Y freebsd/vendor/openssl-X.Y
    $ cd ../vendor/openssl-X.Y

02) Download the latest OpenSSL tarball and signature from the official
    website (https://www.openssl.org/source/).

    $ (cd .. && fetch https://openssl.org/source/openssl-X.Y.Z.tar.gz)
    $ (cd .. && fetch https://openssl.org/source/openssl-X.Y.Z.tar.gz.asc)

03) Verify the signature:

    $ gpg --verify ../openssl-X.Y.Z.tar.gz.asc ../openssl-X.Y.Z.tar.gz

04) Unpack the OpenSSL tarball to the parent directory:

    $ tar -x -X FREEBSD-Xlist -f ../openssl-X.Y.Z.tar.gz -C ..

05) Copy to the vendor branch:

    $ rsync --exclude FREEBSD.* --delete -av ../openssl-X.Y.Z/* .

06) Take care of added / deleted files:

    $ git add -A

07) Commit:

    $ git commit -m "openssl: Vendor import of OpenSSL X.Y.Z"

08) Tag:

    $ git tag -a -m "Tag OpenSSL X.Y.Z" vendor/openssl/X.Y.Z

    At this point the vendor branch can be pushed to the FreeBSD repo via:

    $ git push freebsd vendor/openssl-X.Y
    $ git push freebsd vendor/openssl/X.Y.Z

    Note the second "git push" command is used to push the tag, which is
    not pushed by default.

    It is also possible to push the branch and tag together, but use
    --dry-run first to ensure that no undesired tags will be pushed:

    $ git push --dry-run --follow-tags freebsd vendor/openssl-X.Y
    $ git push --follow-tags freebsd vendor/openssl-X.Y

    The update and tag could instead be pushed later, along with the merge
    to main, but pushing now allows others to collaborate.

09) Merge from the vendor branch:

    $ git subtree merge -P crypto/openssl vendor/openssl-X.Y

    A number of files have been deleted from FreeBSD's copy of OpenSSL.
    If git prompts for these deleted files during the merge, choose 'd'
    (leaving them deleted).

10) Resolve conflicts. Remember to bump the version and date in
    secure/lib/libcrypto/Makefile.inc and
    crypto/openssl/include/openssl/opensslv.h.

11) Diff against the vendor branch:

    $ git diff --diff-filter=M vendor/openssl/X.Y.Z HEAD:crypto/openssl

    Review the diff for any unexpected changes.

12) Re-generate the assembly files:

    $ cd secure/lib/libcrypto
    $ make cleanasm buildasm

13) Update the appropriate makefiles to reflect changes in the vendor's
    build.info files. This is especially important if source files have
    been added or removed. Keep in mind that the assembly files generated
    belong to sys/crypto/openssl, and will therefore affect the kernel as
    well.

14) If symbols have been added or removed, update the appropriate
    Version.map to reflect these changes.

15) Compare compilation flags, the list of files built and included, the
    list of symbols generated with the corresponding port if available.

16) Re-generate the manual files:

    $ tar xzf openssl-X.Y.Z.tar.gz
    $ (cd openssl-X.Y.Z && ./Configure --prefix=/usr --openssldir=/etc/ssl &&
       make build_man_docs)
    [...]
    $ find openssl-X.Y.Z/doc/man/man1 -name '*.1' -exec cp {} secure/usr.bin/openssl/man/ \;
    $ find openssl-X.Y.Z/doc/man/man3 -name '*.3' -exec cp {} secure/lib/libcrypto/man/man3/ \;
    $ find openssl-X.Y.Z/doc/man/man5 -name '*.5' -exec cp {} secure/lib/libcrypto/man/man5/ \;
    $ find openssl-X.Y.Z/doc/man/man7 -name '*.7' -exec cp {} secure/lib/libcrypto/man/man7/ \;
    $ grep -nrF usr/local secure/lib/libcrypto/man secure/usr.bin/openssl/man
    [correct the references to the prefix and OpenSSL directories]
    $ git commit --amend secure/lib/libcrypto/man secure/usr.bin/openssl/man

    Review the diff and tree status for anything requiring attention.

16) Build and install world, reboot, test.

17) Test the legacy and fips providers as well: (here with "test" as the password)

    $ echo test | openssl rc4 -provider legacy -e -a -pbkdf2
    enter RC4 encryption password:
    Verifying - enter RC4 encryption password:
    U2FsdGVkX1+JvhqxLMOvlxvTi1/h

    # openssl fipsinstall -out /etc/ssl/fipsmodule.cnf -module /usr/lib/ossl-modules/fips.so
    INSTALL PASSED
    # vi /etc/ssl/openssl.cnf
    [enable the FIPS module]
    # echo test | openssl aes-256-cbc -provider fips -e -a -pbkdf2
    U2FsdGVkX19lTexiYsnMX83ZLSojBOFwv7GB0Plhgmw=

18) Commit and hope you did not miss anything.