mirror of
git://git.gnupg.org/gnupg.git
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122 lines
2.9 KiB
Bash
122 lines
2.9 KiB
Bash
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#!/bin/sh
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# Get the online version of the GnuPG software version database
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# Copyright (C) 2014 Werner Koch
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#
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# This file is free software; as a special exception the author gives
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# unlimited permission to copy and/or distribute it, with or without
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# modifications, as long as this notice is preserved.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY, to the extent permitted by law; without even the
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# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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# The URL of the file to retrieve.
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urlbase="https://www.gnupg.org/"
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WGET=wget
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GPGV=gpgv
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srcdir=$(dirname "$0")
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distsigkey="$srcdir/../g10/distsigkey.gpg"
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# Convert a 3 part version number it a numeric value.
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cvtver () {
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awk 'NR==1 {split($NF,A,".");X=1000000*A[1]+1000*A[2]+A[3];print X;exit 0}'
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}
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# Prints usage information.
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usage()
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{
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cat <<EOF
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Usage: $(basename $0) [OPTIONS]
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Get the online version of the GnuPG software version database
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Options:
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--skip-download Assume download has already been done.
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--help Print this help.
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EOF
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exit $1
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}
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#
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# Parse options
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#
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skip_download=no
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while test $# -gt 0; do
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case "$1" in
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# Set up `optarg'.
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--*=*)
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optarg=`echo "$1" | sed 's/[-_a-zA-Z0-9]*=//'`
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;;
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*)
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optarg=""
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;;
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esac
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case $1 in
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--help|-h)
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usage 0
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;;
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--skip-download)
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skip_download=yes
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;;
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*)
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usage 1 1>&2
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;;
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esac
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shift
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done
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# Get GnuPG version from VERSIOn file. For a GIT checkout this means
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# that ./autogen.sh must have been run first. For a regular tarball
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# VERSION is always available.
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if [ ! -f "$srcdir/../VERSION" ]; then
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echo "VERSION file missing - run autogen.sh first." >&2
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exit 1
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fi
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version=$(cat "$srcdir/../VERSION")
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version_num=$(echo "$version" | cvtver)
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#
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# Download the list and verify.
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#
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if [ $skip_download = yes ]; then
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if [ ! -f swdb.lst ]; then
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echo "swdb.lst is missing." >&2
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exit 1
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fi
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if [ ! -f swdb.lst.sig ]; then
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echo "swdb.lst.sig is missing." >&2
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exit 1
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fi
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else
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if ! $WGET -q -O swdb.lst "$urlbase/swdb.lst" ; then
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echo "download of swdb.lst failed." >&2
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exit 1
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fi
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if ! $WGET -q -O swdb.lst.sig "$urlbase/swdb.lst.sig" ; then
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echo "download of swdb.lst.sig failed." >&2
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exit 1
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fi
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fi
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if ! $GPGV --keyring "$distsigkey" swdb.lst.sig swdb.lst; then
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echo "list of software versions is not valid!" >&2
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exit 1
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fi
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#
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# Check that the online version of GnuPG is not less than this version
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# to help detect rollback attacks.
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#
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gnupg_ver=$(awk '$1=="gnupg21_ver" {print $2;exit}' swdb.lst)
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if [ -z "$gnupg_ver" ]; then
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echo "GnuPG 2.1 version missing in swdb.lst!" >&2
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exit 1
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fi
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gnupg_ver_num=$(echo "$gnupg_ver" | cvtver)
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if [ $(( $gnupg_ver_num >= $version_num )) = 0 ]; then
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echo "GnuPG version in swdb.lst is less than this version!" >&2
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echo " This version: $version" >&2
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echo " SWDB version: $gnupg_ver" >&2
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exit 1
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fi
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