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use distro-info-data and debootstrap to help with suite name and keyring discovery

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This commit is contained in:
Johannes 'josch' Schauer 2020-08-24 16:20:04 +02:00
parent 7c532d5572
commit dd64e8220d
Signed by: josch
GPG key ID: F2CBA5C78FBD83E1
1 changed files with 277 additions and 124 deletions
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mmdebstrap
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@ -37,7 +37,7 @@ use Cwd qw(abs_path);
require "syscall.ph"; ## no critic (Modules::RequireBarewordIncludes)
use Fcntl qw(S_IFCHR S_IFBLK FD_CLOEXEC F_GETFD F_SETFD);
use List::Util qw(any none);
use POSIX qw(SIGINT SIGHUP SIGPIPE SIGTERM SIG_BLOCK SIG_UNBLOCK);
use POSIX qw(SIGINT SIGHUP SIGPIPE SIGTERM SIG_BLOCK SIG_UNBLOCK strftime);
use Carp;
use Term::ANSIColor;
use Socket;
@ -3322,6 +3322,275 @@ sub hooklistener {
return;
}
# parse files of the format found in /usr/share/distro-info/ and return two
# lists: the first contains codenames of end-of-life distros and the second
# list contains codenames of currently active distros
sub parse_distro_info {
my $file = shift;
my @eol = ();
my @current = ();
my $today = POSIX::strftime "%Y-%m-%d", localtime;
open my $fh, '<', $file or error "cannot open $file: $!";
my $i = 0;
while (my $line = <$fh>) {
chomp($line);
$i++;
my @cells = split /,/, $line;
if (scalar @cells < 4) {
error "cannot parse line $i of $file";
}
if (
$i == 1
and ( scalar @cells < 6
or $cells[0] ne 'version'
or $cells[1] ne 'codename'
or $cells[2] ne 'series'
or $cells[3] ne 'created'
or $cells[4] ne 'release'
or $cells[5] ne 'eol')
) {
error "cannot find correct header in $file";
}
if ($i == 1) {
next;
}
if (scalar @cells == 6) {
if ($cells[5] !~ m/^\d\d\d\d-\d\d-\d\d$/) {
error "invalid eof date format in $file:$i: $cells[5]";
}
# since the date format is iso8601, we can use lexicographic string
# comparison to compare dates
if ($cells[5] lt $today) {
push @eol, $cells[2];
} else {
push @current, $cells[2];
}
} else {
push @current, $cells[2];
}
}
close $fh;
return ([@eol], [@current]);
}
sub get_suite_by_vendor {
my %suite_by_vendor = (
'debian' => {},
'ubuntu' => {},
'tanglu' => {},
'kali' => {},
);
# pre-fill with some known values
foreach my $suite (
'potato', 'woody', 'sarge', 'etch',
'lenny', 'squeeze', 'wheezy', 'jessie'
) {
$suite_by_vendor{'debian'}->{$suite} = 1;
}
foreach my $suite (
'unstable', 'stable', 'oldstable', 'stretch',
'buster', 'bullseye', 'bookworm'
) {
$suite_by_vendor{'debian'}->{$suite} = 0;
}
foreach my $suite ('aequorea', 'bartholomea', 'chromodoris', 'dasyatis') {
$suite_by_vendor{'tanglu'}->{$suite} = 0;
}
foreach my $suite ('kali-dev', 'kali-rolling', 'kali-bleeding-edge') {
$suite_by_vendor{'kali'}->{$suite} = 0;
}
foreach
my $suite ('trusty', 'xenial', 'zesty', 'artful', 'bionic', 'cosmic') {
$suite_by_vendor{'ubuntu'}->{$suite} = 0;
}
# if the Debian package distro-info-data is installed, then we can use it,
# to get better data about new distros or EOL distros
if (-e '/usr/share/distro-info/debian.csv') {
my ($eol, $current)
= parse_distro_info('/usr/share/distro-info/debian.csv');
foreach my $suite (@{$eol}) {
$suite_by_vendor{'debian'}->{$suite} = 1;
}
foreach my $suite (@{$current}) {
$suite_by_vendor{'debian'}->{$suite} = 0;
}
}
if (-e '/usr/share/distro-info/ubuntu.csv') {
my ($eol, $current)
= parse_distro_info('/usr/share/distro-info/ubuntu.csv');
foreach my $suite (@{$eol}, @{$current}) {
$suite_by_vendor{'ubuntu'}->{$suite} = 0;
}
}
# if debootstrap is installed we infer distro names from the symlink
# targets of the scripts in /usr/share/debootstrap/scripts/
my $debootstrap_scripts = '/usr/share/debootstrap/scripts/';
if (-d $debootstrap_scripts) {
opendir(my $dh, $debootstrap_scripts)
or error "Can't opendir($debootstrap_scripts): $!";
while (my $suite = readdir $dh) {
# this is only a heuristic -- don't overwrite anything but instead
# just update anything that was missing
if (!-l "$debootstrap_scripts/$suite") {
next;
}
my $target = readlink "$debootstrap_scripts/$suite";
if ($target eq "sid"
and not exists $suite_by_vendor{'debian'}->{$suite}) {
$suite_by_vendor{'debian'}->{$suite} = 0;
} elsif ($target eq "gutsy"
and not exists $suite_by_vendor{'ubuntu'}->{$suite}) {
$suite_by_vendor{'ubuntu'}->{$suite} = 0;
} elsif ($target eq "aequorea"
and not exists $suite_by_vendor{'tanglu'}->{$suite}) {
$suite_by_vendor{'tanglu'}->{$suite} = 0;
} elsif ($target eq "kali"
and not exists $suite_by_vendor{'kali'}->{$suite}) {
$suite_by_vendor{'kali'}->{$suite} = 0;
}
}
closedir($dh);
}
return %suite_by_vendor;
}
# try to guess the right keyring path for the given suite
sub get_keyring_by_suite {
my $query = shift;
my $suite_by_vendor = shift;
my $debianvendor;
my $ubuntuvendor;
eval {
require Dpkg::Vendor::Debian;
require Dpkg::Vendor::Ubuntu;
$debianvendor = Dpkg::Vendor::Debian->new();
$ubuntuvendor = Dpkg::Vendor::Ubuntu->new();
};
my $keyring_by_vendor = sub {
my $vendor = shift;
my $eol = shift;
if ($vendor eq 'debian') {
if ($eol) {
if (defined $debianvendor) {
return $debianvendor->run_hook(
'archive-keyrings-historic');
} else {
return
'/usr/share/keyrings/debian-archive-removed-keys.gpg';
}
} else {
if (defined $debianvendor) {
return $debianvendor->run_hook('archive-keyrings');
} else {
return '/usr/share/keyrings/debian-archive-keyring.gpg';
}
}
} elsif ($vendor eq 'ubuntu') {
if (defined $ubuntuvendor) {
return $ubuntuvendor->run_hook('archive-keyrings');
} else {
return '/usr/share/keyrings/ubuntu-archive-keyring.gpg';
}
} elsif ($vendor eq 'tanglu') {
return '/usr/share/keyrings/tanglu-archive-keyring.gpg';
} elsif ($vendor eq 'kali') {
return '/usr/share/keyrings/kali-archive-keyring.gpg';
} else {
error "unknown vendor: $vendor";
}
};
my %keyrings = ();
foreach my $vendor (keys %{$suite_by_vendor}) {
foreach my $suite (keys %{ $suite_by_vendor->{$vendor} }) {
my $keyring = $keyring_by_vendor->(
$vendor, $suite_by_vendor->{$vendor}->{$suite});
debug "suite $suite with keyring $keyring";
$keyrings{$suite} = $keyring;
}
}
if (exists $keyrings{$query}) {
return $keyrings{$query};
} else {
return;
}
}
sub get_sourceslist_by_suite {
my $suite = shift;
my $arch = shift;
my $signedby = shift;
my $compstr = shift;
my $suite_by_vendor = shift;
my @debstable = keys %{ $suite_by_vendor->{'debian'} };
my @ubuntustable = keys %{ $suite_by_vendor->{'ubuntu'} };
my @tanglustable = keys %{ $suite_by_vendor->{'tanglu'} };
my @kali = keys %{ $suite_by_vendor->{'kali'} };
my $mirror = 'http://deb.debian.org/debian';
my $secmirror = 'http://security.debian.org/debian-security';
if (any { $_ eq $suite } @ubuntustable) {
if (any { $_ eq $arch } ('amd64', 'i386')) {
$mirror = 'http://archive.ubuntu.com/ubuntu';
$secmirror = 'http://security.ubuntu.com/ubuntu';
} else {
$mirror = 'http://ports.ubuntu.com/ubuntu-ports';
$secmirror = 'http://ports.ubuntu.com/ubuntu-ports';
}
if (-e '/usr/share/debootstrap/scripts/gutsy') {
# try running the debootstrap script but ignore errors
my $script = 'set -eu;
default_mirror() { echo $1; };
mirror_style() { :; };
download_style() { :; };
finddebs_style() { :; };
variants() { :; };
keyring() { :; };
doing_variant() { false; };
. /usr/share/debootstrap/scripts/gutsy;';
open my $fh, '-|', 'env', "ARCH=$arch", "SUITE=$suite",
'sh', '-c', $script // last;
chomp(
my $output = do { local $/; <$fh> }
);
close $fh;
if ($? == 0 && $output ne '') {
$mirror = $output;
}
}
} elsif (any { $_ eq $suite } @tanglustable) {
$mirror = 'http://archive.tanglu.org/tanglu';
} elsif (any { $_ eq $suite } @kali) {
$mirror = 'https://http.kali.org/kali';
}
my $sourceslist = '';
$sourceslist .= "deb$signedby $mirror $suite $compstr\n";
if (any { $_ eq $suite } @ubuntustable) {
$sourceslist .= "deb$signedby $mirror $suite-updates $compstr\n";
$sourceslist .= "deb$signedby $secmirror $suite-security $compstr\n";
} elsif (any { $_ eq $suite } @tanglustable) {
$sourceslist .= "deb$signedby $secmirror $suite-updates $compstr\n";
} elsif (any { $_ eq $suite } @debstable
and none { $_ eq $suite } ('testing', 'unstable', 'sid')) {
$sourceslist .= "deb$signedby $mirror $suite-updates $compstr\n";
if (any { $_ eq $suite } ('bullseye')) {
# starting from bullseye use
# https://lists.debian.org/87r26wqr2a.fsf@43-1.org
$sourceslist
.= "deb$signedby $secmirror $suite-security" . " $compstr\n";
} else {
$sourceslist
.= "deb$signedby $secmirror $suite/updates" . " $compstr\n";
}
}
return $sourceslist;
}
sub guess_sources_format {
my $content = shift;
my $is_deb822 = 0;
@ -3989,70 +4258,11 @@ sub main() {
# if the currently selected apt keyrings do not contain the
# necessary key material for the chosen suite, then attempt adding
# a signed-by option
my $signedby = '';
my $signedby = '';
my %suite_by_vendor = get_suite_by_vendor();
{
# try to guess the right keyring path for the given suite
my $debianvendor;
my $ubuntuvendor;
eval {
require Dpkg::Vendor::Debian;
require Dpkg::Vendor::Ubuntu;
$debianvendor = Dpkg::Vendor::Debian->new();
$ubuntuvendor = Dpkg::Vendor::Ubuntu->new();
};
my $keyring;
if (
any { $_ eq $suite } (
'potato', 'woody', 'sarge', 'etch',
'lenny', 'squeeze', 'wheezy'
)
) {
if (defined $debianvendor) {
$keyring = $debianvendor->run_hook(
'archive-keyrings-historic');
} else {
$keyring
= '/usr/share/keyrings/'
. 'debian-archive-removed-keys.gpg';
}
} elsif (
any { $_ eq $suite }
('aequorea', 'bartholomea', 'chromodoris', 'dasyatis')
) {
$keyring
= '/usr/share/keyrings/tanglu-archive-keyring.gpg';
} elsif (
any { $_ eq $suite }
('kali-dev', 'kali-rolling', 'kali-bleeding-edge')
) {
$keyring = '/usr/share/keyrings/kali-archive-keyring.gpg';
} elsif (
any { $_ eq $suite } (
'trusty', 'xenial', 'zesty', 'artful', 'bionic',
'cosmic'
)
) {
if (defined $ubuntuvendor) {
$keyring = $ubuntuvendor->run_hook('archive-keyrings');
} else {
$keyring
= '/usr/share/keyrings/'
. 'ubuntu-archive-keyring.gpg';
}
} elsif (
any { $_ eq $suite } (
'unstable', 'stable', 'oldstable', 'jessie',
'stretch', 'buster', 'bullseye', 'bookworm'
)
) {
if (defined $debianvendor) {
$keyring = $debianvendor->run_hook('archive-keyrings');
} else {
$keyring
= '/usr/share/keyrings/'
. 'debian-archive-keyring.gpg';
}
} else {
my $keyring = get_keyring_by_suite($suite, \%suite_by_vendor);
if (!defined $keyring) {
last;
}
@ -4248,66 +4458,9 @@ sub main() {
}
}
} else {
my @debstable = (
'oldoldstable', 'oldstable', 'stable', 'jessie',
'stretch', 'buster', 'bullseye', 'bookworm'
);
my @ubuntustable
= ('trusty', 'xenial', 'zesty', 'artful', 'bionic',
'cosmic');
my @tanglustable
= ('aequorea', 'bartholomea', 'chromodoris', 'dasyatis');
my @kali = ('kali-dev', 'kali-rolling', 'kali-bleeding-edge');
my $mirror = 'http://deb.debian.org/debian';
my $secmirror = 'http://security.debian.org/debian-security';
if (any { $_ eq $suite } @ubuntustable) {
if (
any { $_ eq $options->{nativearch} }
('amd64', 'i386')
) {
$mirror = 'http://archive.ubuntu.com/ubuntu';
$secmirror = 'http://security.ubuntu.com/ubuntu';
} else {
$mirror = 'http://ports.ubuntu.com/ubuntu-ports';
$secmirror = 'http://ports.ubuntu.com/ubuntu-ports';
}
} elsif (any { $_ eq $suite } @tanglustable) {
$mirror = 'http://archive.tanglu.org/tanglu';
} elsif (any { $_ eq $suite } @kali) {
$mirror = 'https://http.kali.org/kali';
}
my $sourceslist = '';
$sourceslist .= "deb$signedby $mirror $suite $compstr\n";
if (any { $_ eq $suite } @ubuntustable) {
$sourceslist
.= "deb$signedby $mirror $suite-updates $compstr\n";
$sourceslist
.= "deb$signedby $secmirror $suite-security $compstr\n";
} elsif (any { $_ eq $suite } @tanglustable) {
$sourceslist
.= "deb$signedby $secmirror $suite-updates $compstr\n";
} elsif (any { $_ eq $suite } @debstable) {
$sourceslist
.= "deb$signedby $mirror $suite-updates $compstr\n";
if (
any { $_ eq $suite } (
'oldoldstable', 'oldstable',
'stable', 'jessie',
'stretch', 'buster'
)
) {
$sourceslist
.= "deb$signedby $secmirror $suite/updates"
. " $compstr\n";
} else {
# starting from bullseye use
# https://lists.debian.org/87r26wqr2a.fsf@43-1.org
$sourceslist
.= "deb$signedby $secmirror $suite-security"
. " $compstr\n";
}
}
my $sourceslist
= get_sourceslist_by_suite($suite, $options->{nativearch},
$signedby, $compstr, \%suite_by_vendor);
push @{$sourceslists},
{
type => 'one-line',