$Id: tl-key-extension.txt 73493 2025-01-17 22:28:29Z karl $
(Public domain.)
How to update TeX Live distribution signing key
===============================================
This must be done every year! It's not optional.
shut down networking service
cp gpg directory from USB stick to computer
export GNUPGHOME=...<COPY OF USBSTICK gpg directory>
export KEYID=0xC78B82D8C79512F79CC0D7C80D5E5D9106BAB6BC
gpg --edit-key $KEYID
> key 2
# selects the expiring key, check!
> expire
> 16m
# choose something after the release of the next TL
> save
# export public key for import into svn and TUG account
gpg -a --export $KEYID > texlive.asc
# update USB drive with new stuff, remove from home,
rm -rf $GNUPGHOME
unset GNUPGHOME
# send keys
# make sure that .gnupg/dirmngr.conf does NOT contain hkp-cacert lines!!!
# upload to keyservers. No other good key servers currently known.
keyservers=(
"hkps://keys.openpgp.org/"
"hkps://keyserver.ubuntu.com/"
)
for ks in ${keyservers[@]} ; do
gpg --send-key --keyserver $ks $KEYID
done
## upload to keys.openpgp.org:
#gpg --export $KEYID | curl -T -
https://keys.openpgp.org
## this will give an URL to associate key with email, visit it!
# to check if it's there:
gpg --list-key --keyserver hkp://keyserver.ubuntu.com:80 tex-live
# The new GPG servers strip signatures due to signature poisoning
# attacks, so we tell people to download the key from our web site.
# update TeX Live repository
export GNUPGHOME=/home/texlive/Master/tlpkg/gpg # wherever svn checkout
# use gpg version 1 here!!!
gpg1 --import texlive.asc
svn commit
#
# On the TUG server. Get the exported public key in
# texlive.asc, see above how to export it.
# This needs to be done with the owner of the .gnupg directory,
# since group access is disallowed by gpg.
gpg --homedir /home/texlive/.gnupg --import texlive.asc
# can view that .asc with:
gpg --homedir /home/texlive/.gnupg texlive.asc
# update web-accessible public key, keeping old files but updating symlink:
cp texlive.asc ~www/texlive/files/texlive`date +%Y`.asc
ln -s texlive`date +%Y`.asc ~www/texlive/files/texlive.asc
# update key example on web page, as in:
cd /home/httpd/html/texlive/
co -l verify.html
$EDITOR !$
ci -u -m"`date +%Y` key update"
General info:
tlgpg runs a gpg command with the above TL .gnupg directory, etc.
tl-sign-file (uses tlgpg) is used to sign texlive.tlpdb.sha512.
tlgpg-verify foo[.asc] will check for expired key, per below.
tl-sign-file uses this to make sure it is not signing with an expired key.
(tl)gpg foo.asc will sometimes report expiration info.
given files updated in Master/tlpkg/gpg, can export into asc:
gpg --homedir ..../Master/tlpkg/gpg --export -a $KEYID >tl.asc
gpg --verify --verbose foo.asc reports some info.
but exit status is zero even with expired keys; to check,
use --status-file and inspect:
gpg --verify --verbose --status-file=/tmp/st foo.asc
see tlgpg, tlgpg-verify, tl-sign-file, TLCrypto.pm for full implementation.
