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sa-update.raw
executable file
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sa-update.raw
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#!/usr/bin/perl -w -T
# <@LICENSE>
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to you under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at:
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# </@LICENSE>
use strict;
use warnings;
use re 'taint';
my $VERSION = 'svnunknown';
if ('$Id$' =~ ':') {
# Subversion keyword "$Id$" has been successfully expanded.
# Doesn't happen with automated launchpad builds:
# https://bugs.launchpad.net/launchpad/+bug/780916
$VERSION = &Mail::SpamAssassin::Version . ' / svn' . (split(/\s+/, '$Id$'))[2];
}
my $PREFIX = '@@PREFIX@@'; # substituted at 'make' time
my $DEF_RULES_DIR = '@@DEF_RULES_DIR@@'; # substituted at 'make' time
my $LOCAL_RULES_DIR = '@@LOCAL_RULES_DIR@@'; # substituted at 'make' time
my $LOCAL_STATE_DIR = '@@LOCAL_STATE_DIR@@'; # substituted at 'make' time
use lib '@@INSTALLSITELIB@@'; # substituted at 'make' time
# We want to do a small amount of macro processing during channel installs,
# based on the values as passed in via 'make'
my %MACRO_VALUES = (
'VERSION' => '@@VERSION@@',
'CONTACT_ADDRESS' => '@@CONTACT_ADDRESS@@',
'PREFIX' => '@@PREFIX@@',
'DEF_RULES_DIR' => '@@DEF_RULES_DIR@@',
'LOCAL_RULES_DIR' => '@@LOCAL_RULES_DIR@@',
'LOCAL_STATE_DIR' => '@@LOCAL_STATE_DIR@@',
'INSTALLSITELIB' => '@@INSTALLSITELIB@@',
);
# Standard perl modules
use Errno qw(ENOENT EACCES);
use IO::File qw(O_RDONLY O_WRONLY O_RDWR O_CREAT O_EXCL);
use File::Spec;
use File::Path;
use Getopt::Long;
use Pod::Usage;
use Config;
use POSIX qw(locale_h setsid sigprocmask _exit);
POSIX::setlocale(LC_TIME,'C');
BEGIN { # see comments in "spamassassin.raw" for doco
my @bin = File::Spec->splitpath($0);
my $bin = ($bin[0] ? File::Spec->catpath(@bin[0..1], '') : $bin[1])
|| File::Spec->curdir;
if (-e $bin.'/lib/Mail/SpamAssassin.pm'
|| !-e '@@INSTALLSITELIB@@/Mail/SpamAssassin.pm' )
{
my $searchrelative;
$searchrelative = 1; # disabled during "make install": REMOVEFORINST
if ($searchrelative && $bin eq '../' && -e '../blib/lib/Mail/SpamAssassin.pm')
{
unshift ( @INC, '../blib/lib' );
} else {
foreach ( qw(lib ../lib/site_perl
../lib/spamassassin ../share/spamassassin/lib))
{
my $dir = File::Spec->catdir( $bin, split ( '/', $_ ) );
if ( -f File::Spec->catfile( $dir, "Mail", "SpamAssassin.pm" ) )
{ unshift ( @INC, $dir ); last; }
}
}
}
}
# These are the non-standard required modules
use Net::DNS;
use Archive::Tar 1.23;
use IO::Zlib 1.04;
use Mail::SpamAssassin::Logger qw(:DEFAULT info log_message);
our ($have_lwp, $io_socket_module_name, $have_inet4, $use_inet4, $have_inet6, $use_inet6, $have_sha256, $have_sha512);
BEGIN {
# Deal with optional modules
eval { require Digest::SHA; Digest::SHA->import(qw(sha256_hex sha512_hex)); 1 } and do { $have_sha256=1; $have_sha512=1 }
or die "Unable to verify file hashes! You must install a modern version of Digest::SHA.";
$have_lwp = eval {
require LWP::UserAgent;
};
if (eval { require IO::Socket::IP }) { # handles IPv6 and IPv4
$io_socket_module_name = 'IO::Socket::IP';
} elsif (eval { require IO::Socket::INET6 }) { # handles IPv6 and IPv4
$io_socket_module_name = 'IO::Socket::INET6';
} elsif (eval { require IO::Socket::INET }) { # IPv4 only
$io_socket_module_name = 'IO::Socket::INET';
}
$have_inet4 = # can we create a PF_INET socket?
defined $io_socket_module_name && eval {
my $sock =
$io_socket_module_name->new(LocalAddr => '0.0.0.0', Proto => 'tcp');
$sock->close or die "error closing socket: $!" if $sock;
$sock ? 1 : undef;
};
$have_inet6 = # can we create a PF_INET6 socket?
defined $io_socket_module_name &&
$io_socket_module_name ne 'IO::Socket::INET' &&
eval {
my $sock =
$io_socket_module_name->new(LocalAddr => '::', Proto => 'tcp');
$sock->close or die "error closing socket: $!" if $sock;
$sock ? 1 : undef;
};
}
# These should already be available
use Mail::SpamAssassin;
use Mail::SpamAssassin::Util qw(untaint_var untaint_file_path
proc_status_ok exit_status_str am_running_on_windows
secure_tmpfile secure_tmpdir);
# Make the main dbg() accessible in our package w/o an extra function
*dbg=\&Mail::SpamAssassin::dbg;
sub dbg;
$| = 1; # autoflushing STDOUT makes verbose output consistent with warnings
# Clean up PATH appropriately
Mail::SpamAssassin::Util::clean_path_in_taint_mode();
##############################################################################
# Default list of GPG keys allowed to sign update releases
#
# pub 4096R/5244EC45 2005-12-20
# Key fingerprint = 5E54 1DC9 59CB 8BAC 7C78 DFDC 4056 A61A 5244 EC45
# uid updates.spamassassin.org Signing Key <release@spamassassin.org>
# sub 4096R/24F434CE 2005-12-20
#
# note for gpg newbs: these are "long" gpg keyids. It's common to also
# use the last 8 hex digits as a shorter keyid string.
#
my %valid_GPG = (
'0C2B1D7175B852C64B3CDC716C55397824F434CE' => 1,
'5E541DC959CB8BAC7C78DFDC4056A61A5244EC45' => 1,
);
# Default list of channels to update against
#
my @channels = ( 'updates.spamassassin.org' );
my $IGNORE_MIRBY_OLDER_THAN = (24 * 60 * 60 * 7); # 1 week
##############################################################################
my %opt;
@{$opt{'gpgkey'}} = ();
@{$opt{'channel'}} = ();
my $GPG_ENABLED = 1;
$opt{'gpghomedir'} = File::Spec->catfile($LOCAL_RULES_DIR, 'sa-update-keys');
Getopt::Long::Configure(
qw(bundling no_getopt_compat no_auto_abbrev no_ignore_case));
GetOptions(
'debug|D:s' => \$opt{'debug'},
'version|V' => \$opt{'version'},
'help|h|?' => \$opt{'help'},
'verbose|v+' => \$opt{'verbose'},
'checkonly' => \$opt{'checkonly'},
'allowplugins' => \$opt{'allowplugins'},
'reallyallowplugins' => \$opt{'reallyallowplugins'},
'refreshmirrors' => \$opt{'refreshmirrors'},
'forcemirror=s' => \$opt{'forcemirror'},
'httputil=s' => \$opt{'httputil'},
'score-multiplier=s' => \$opt{'score-multiplier'},
'score-limit=s' => \$opt{'score-limit'},
# allow multiple of these on the commandline
'gpgkey=s' => $opt{'gpgkey'},
'gpghomedir=s' => \$opt{'gpghomedir'},
'channel=s' => $opt{'channel'},
'install=s' => \$opt{'install'},
'import=s' => \$opt{'import'},
'gpgkeyfile=s' => \$opt{'gpgkeyfile'},
'channelfile=s' => \$opt{'channelfile'},
'updatedir=s' => \$opt{'updatedir'},
'gpg!' => \$GPG_ENABLED,
'4' => sub { $opt{'force_pf'} = 'inet' },
'6' => sub { $opt{'force_pf'} = 'inet6' },
# backward compatibility
'usegpg' => \$GPG_ENABLED,
) or print_usage_and_exit();
if ( defined $opt{'help'} ) {
print_usage_and_exit("For more information read the sa-update man page.\n", 0);
}
if ( defined $opt{'version'} ) {
print_version();
exit(0);
}
if ( $opt{'allowplugins'} && !$opt{'reallyallowplugins'} ) {
warn "Security warning: dangerous option --allowplugins used:\n".
"- there should never be need to use this option, see man sa-update(1)\n".
"- specify --reallyallowplugins to allow activating plugins\n";
exit 2;
}
$use_inet4 = $have_inet4 && ( !$opt{'force_pf'} || $opt{'force_pf'} eq 'inet' );
$use_inet6 = $have_inet6 && ( !$opt{'force_pf'} || $opt{'force_pf'} eq 'inet6' );
if ( $opt{'force_pf'} && $opt{'force_pf'} eq 'inet' && !$have_inet4 ) {
warn "Option -4 specified but support for the ".
"INET protocol family is not available.\n";
}
if ( $opt{'force_pf'} && $opt{'force_pf'} eq 'inet6' && !$have_inet6 ) {
warn "Option -6 specified but support for the ".
"INET6 protocol family is not available.\n";
}
if ( defined $opt{'httputil'} && $opt{'httputil'} !~ /^(curl|wget|fetch|lwp)$/ ) {
warn "Invalid parameter for --httputil, curl|wget|fetch|lwp wanted\n";
}
if ( defined $opt{'score-multiplier'} && $opt{'score-multiplier'} !~ /^\d+(?:\.\d+)?$/ ) {
die "Invalid parameter for --score-multiplier, integer or float expected.\n";
}
if ( defined $opt{'score-limit'} && $opt{'score-limit'} !~ /^\d+(?:\.\d+)?$/ ) {
die "Invalid parameter for --score-limit, integer or float expected.\n";
}
# Figure out what version of SpamAssassin we're using, and also figure out the
# reverse of it for the DNS query. Handle x.yyyzzz as well as x.yz.
my $SAVersion = $Mail::SpamAssassin::VERSION;
if ($SAVersion =~ /^(\d+)\.(\d{3})(\d{3})$/) {
$SAVersion = join(".", $1+0, $2+0, $3+0);
}
elsif ($SAVersion =~ /^(\d)\.(\d)(\d)$/) {
$SAVersion = "$1.$2.$3";
}
else {
die "fatal: SpamAssassin version number '$SAVersion' is in an unknown format!\n";
}
my $RevSAVersion = join(".", reverse split(/\./, $SAVersion));
# set debug areas, if any specified (only useful for command-line tools)
$SAVersion =~ /^(\d+\.\d+)/;
if ($1+0 > 3.0) {
$opt{'debug'} ||= 'all' if (defined $opt{'debug'});
}
else {
$opt{'debug'} = defined $opt{'debug'};
}
# Find the default site rule directory, also setup debugging and other M::SA bits
my $SA = Mail::SpamAssassin->new({
debug => $opt{'debug'},
local_tests_only => 1,
dont_copy_prefs => 1,
PREFIX => $PREFIX,
DEF_RULES_DIR => $DEF_RULES_DIR,
LOCAL_RULES_DIR => $LOCAL_RULES_DIR,
LOCAL_STATE_DIR => $LOCAL_STATE_DIR,
});
if (defined $opt{'updatedir'}) {
$opt{'updatedir'} = untaint_file_path($opt{'updatedir'});
}
else {
$opt{'updatedir'} = $SA->sed_path('__local_state_dir__/__version__');
}
# check only disabled gpg
# https://issues.apache.org/SpamAssassin/show_bug.cgi?id=5854
if ( defined $opt{'checkonly'}) {
$GPG_ENABLED=0;
dbg("gpg: Disabling gpg requirement due to checkonly flag.");
}
dbg("generic: sa-update version $VERSION");
dbg("generic: using update directory: $opt{'updatedir'}");
# doesn't really display useful things for this script, but we do want
# a module/version listing, etc. sa-update may be used for older versions
# of SA that don't include this function, so eval around it.
eval { $SA->debug_diagnostics(); 1; };
$SA->finish();
# untaint the command-line args; since the root user supplied these, and
# we're not a setuid script, we trust them
foreach my $optkey (keys %opt) {
next if ref $opt{$optkey};
untaint_var(\$opt{$optkey});
}
##############################################################################
# Deal with gpg-related options
if (@{$opt{'gpgkey'}}) {
$GPG_ENABLED = 1;
foreach my $key (@{$opt{'gpgkey'}}) {
unless (is_valid_gpg_key_id($key)) {
dbg("gpg: invalid gpgkey parameter $key");
next;
}
$key = uc $key;
dbg("gpg: adding key id $key");
$valid_GPG{$key} = 1;
}
}
if (defined $opt{'gpgkeyfile'}) {
$GPG_ENABLED = 1;
open(GPG, $opt{'gpgkeyfile'})
or die "cannot open $opt{'gpgkeyfile'} for reading: $!\n";
dbg("gpg: reading in gpgfile ".$opt{'gpgkeyfile'});
while(my $key = <GPG>) {
chomp $key;
$key =~ s/#.*$//; # remove comments
$key =~ s/^\s+//; # remove leading whitespace
$key =~ s/\s+$//; # remove tailing whitespace
next if $key eq ''; # skip empty lines
unless (is_valid_gpg_key_id($key)) {
dbg("gpg: invalid key id $key");
next;
}
$key = uc $key;
dbg("gpg: adding key id $key");
$valid_GPG{$key} = 1;
}
close(GPG) or die "cannot close $opt{'gpgkeyfile'}: $!";
}
# At this point, we need to know where GPG is ...
my $GPGPath;
if ($GPG_ENABLED || $opt{'import'}) {
# find GPG in the PATH
# bug 4958: for *NIX it's "gpg", in Windows it's "gpg.exe"
$GPGPath = 'gpg' . $Config{_exe};
dbg("gpg: Searching for '$GPGPath'");
if ($GPGPath = Mail::SpamAssassin::Util::find_executable_in_env_path($GPGPath)) {
dbg("gpg: found $GPGPath");
# bug 5030: if GPGPath has a space, put it in quotes
if ($GPGPath =~ / /) {
$GPGPath =~ s/"/\\"/g;
$GPGPath = qq/"$GPGPath"/;
dbg("gpg: path changed to $GPGPath");
}
}
else {
die "error: gpg required but not found! It is not recommended, but you can use \"sa-update\" with the --no-gpg to skip the verification. \n";
}
# GPG was found, and we've been asked to import a key only
if ( $opt{'import'} ) {
my $ex = import_gpg_key($opt{'import'});
exit $ex;
}
# does the sa-update keyring exist? if not, import it
if(!-f File::Spec->catfile($opt{'gpghomedir'}, "trustdb.gpg")) {
import_default_keyring();
# attempt to continue even if this fails, anyway
}
# specify which keys are trusted
dbg("gpg: release trusted key id list: ".join(" ", keys %valid_GPG));
# convert fingerprint gpg ids to keyids
foreach (keys %valid_GPG) {
my $id = substr $_, -8;
$valid_GPG{$id} = 1;
}
}
##############################################################################
# Deal with channel-related options
if (defined $opt{'channel'} && scalar @{$opt{'channel'}} > 0) {
@channels = @{$opt{'channel'}};
}
if (defined $opt{'channelfile'}) {
open(CHAN, $opt{'channelfile'})
or die "cannot open $opt{'channelfile'} for reading: $!\n";
dbg("channel: reading in channelfile ".$opt{'channelfile'});
@channels = ();
while(my $chan = <CHAN>) {
chomp $chan;
$chan =~ s/#.*$//; # remove comments
$chan =~ s/^\s+//; # remove leading whitespace
$chan =~ s/\s+$//; # remove tailing whitespace
next if $chan eq ''; # skip empty lines
$chan = lc $chan;
dbg("channel: adding $chan");
push(@channels, $chan);
}
close(CHAN) or die "cannot close $opt{'channelfile'}: $!";
}
# untaint the channel listing
for(my $ind = 0; $ind < @channels; $ind++) {
local($1); # bug 5061: prevent random taint flagging of $1
if ($channels[$ind] =~ /^([a-zA-Z0-9._-]+)$/) {
untaint_var(\$channels[$ind]);
}
else {
dbg("channel: skipping invalid channel: $channels[$ind]");
splice @channels, $ind, 1;
$ind--; # the next element takes the place of the deleted one
}
}
my ($res, $ua);
if ($opt{'install'}) {
if (scalar @channels > 1) {
die "fatal: --install cannot be used with multiple --channel switches.\n";
}
} else {
$res = Net::DNS::Resolver->new();
$res->force_v4(1) if $have_inet4 &&
$opt{'force_pf'} && $opt{'force_pf'} eq 'inet';
}
# Generate a temporary file to put channel content in for later use ...
my ($content_file, $tfh) = secure_tmpfile();
$tfh
or die "fatal: could not create temporary channel content file: $!\n";
close $tfh
or die "cannot close temporary channel content file $content_file: $!";
undef $tfh;
my $lint_failures = 0;
my $channel_failures = 0;
my $channel_successes = 0;
# Use a temporary directory for all update channels
my $UPDTmp;
# we only need to lint the site pre files once
my $site_pre_linted = 0;
# Go ahead and loop through all of the channels
foreach my $channel (@channels) {
dbg("channel: attempting channel $channel");
my %preserve_files;
# Convert the channel to a nice-for-filesystem version
my $nicechannel = $channel;
$nicechannel =~ tr/A-Za-z0-9-/_/cs;
my $UPDDir = File::Spec->catfile($opt{'updatedir'}, $nicechannel);
my $CFFile = "$UPDDir.cf";
my $PREFile = "$UPDDir.pre";
if (-d $UPDDir) {
dbg("channel: using existing directory $UPDDir");
} else {
# create the dir, if it doesn't exist
dbg("channel: creating directory $UPDDir");
mkpath([$UPDDir], 0, 0777)
or die "channel: cannot create channel directory $UPDDir: $!\n";
}
dbg("channel: channel cf file $CFFile");
dbg("channel: channel pre file $PREFile");
my $instfile;
if ($opt{'install'}) {
$instfile = $opt{'install'};
dbg("channel: installing from file $instfile");
}
my($mirby, $mirby_force_reload, $mirby_file_is_ok);
my $mirby_path = File::Spec->catfile($UPDDir, "MIRRORED.BY");
# try to read metadata from channel.cf file
my $currentV = -1;
if (!open(CF, $CFFile)) {
dbg("channel: error opening file %s: %s",
$CFFile, $!) unless $! == ENOENT;
} else {
while(<CF>) {
local($1,$2);
last unless /^# UPDATE\s+([A-Za-z]+)\s+(\S+)/;
my($type, $value) = (lc $1,$2);
dbg("channel: metadata $type = $value, from file $CFFile");
if ($type eq 'version') {
$value =~ /^(\d+)/;
$currentV = $1;
}
}
close(CF) or die "cannot close $CFFile: $!";
}
# obtain a version number which should be installed
my $newV;
if ($instfile) {
# the /.*/ ensures we use the 3-digit string nearest to the end of string,
# otherwise we might pick up something from the middle of the directory path
local($1);
if ($instfile !~ /(?:.*\D|^)(\d{3,})/) {
# this is a requirement
die "channel: $channel: --install file $instfile does not contain a 3-digit version number!\n";
}
$newV = $1;
if ( defined $opt{'checkonly'} ) {
dbg("channel: $channel: --install and --checkonly, claiming update available");
$channel_successes++;
next;
}
} else { # not an install file, get the latest version number from network
# Setup the channel version DNS query
my $DNSQ = "$RevSAVersion.$channel";
my $dnsV = join(' ', do_dns_query($DNSQ));
local($1);
if (defined $dnsV && $dnsV =~ /^(\d+)/) {
$newV = untaint_var($1) if (!defined $newV || $1 > $newV);
dbg("dns: $DNSQ => $dnsV, parsed as $1");
}
# Not getting a response isn't a failure, there may just not be any updates
# for this SA version yet.
if (!defined $newV) {
my @mirs = do_dns_query("mirrors.$channel");
if (defined shift @mirs) {
dbg("channel: no updates available, skipping channel");
} else {
channel_failed("channel '$channel': no 'mirrors.$channel' record found");
}
next;
}
# If this channel hasn't been installed before, or it's out of date,
# keep going. Otherwise, skip it.
if ($currentV >= $newV) {
dbg("channel: current version is $currentV, new version is $newV, ".
"skipping channel");
next;
}
print "Update available for channel $channel: $currentV -> $newV\n" if $opt{'verbose'};
# If we are only checking for update availability, exit now
if ( defined $opt{'checkonly'} ) {
dbg("channel: $channel: update available, not downloading ".
"in checkonly mode");
$channel_successes++;
next;
}
}
# we need a directory we control that we can use to avoid loading any rules
# when we lint the site pre files, we might as well use the channel temp dir
dbg("channel: preparing temp directory for new channel");
if (!$UPDTmp) {
$UPDTmp = secure_tmpdir();
dbg("channel: created tmp directory $UPDTmp");
}
else {
dbg("channel: using existing tmp directory $UPDTmp");
if (!clean_update_dir($UPDTmp)) {
die "channel: attempt to clean update temp dir failed, aborting";
}
}
# lint the site pre files (that will be used when lint checking the channel)
# before downloading the channel update
unless ($site_pre_linted) {
dbg("generic: lint checking site pre files once before attempting channel updates");
unless (lint_check_dir(File::Spec->catfile($UPDTmp, "doesnotexist"))) {
dbg("generic: lint of site pre files failed, cannot continue");
print "Lint of site pre files failed, cannot continue\n" if $opt{'verbose'};
$lint_failures++;
last;
}
dbg("generic: lint check of site pre files succeeded, continuing with channel updates");
$site_pre_linted = 1;
}
my $content;
my $SHA512;
my $SHA256;
my $GPG;
if ($instfile) {
dbg("channel: using --install files $instfile\{,.sha256,.sha512,.asc\}");
$content = read_install_file($instfile);
if ( -s "$instfile.sha512" ) { $SHA512 = read_install_file($instfile.".sha512"); }
if ( -s "$instfile.sha256" ) { $SHA256 = read_install_file($instfile.".sha256"); }
$GPG = read_install_file($instfile.".asc") if $GPG_ENABLED;
} else { # not an install file, obtain fresh rules from network
dbg("channel: protocol family available: %s%s",
join(',', $have_inet4 ? 'inet' : (),
$have_inet6 ? 'inet6' : ()),
$opt{'force_pf'} ? '; force '.$opt{'force_pf'} : '' );
# test if the MIRRORED.BY file for this channel exists,
# is nonempty, and is reasonably fresh
my(@mirr_stat_list) = stat($mirby_path);
if (!@mirr_stat_list) {
if ($! == ENOENT) {
dbg("channel: no mirror file %s, will fetch it", $mirby_path);
} else {
# protection error, misconfiguration, file system error, ...
warn "error: error accessing mirrors file $mirby_path: $!\n";
channel_failed("channel '$channel': error accessing mirrors file $mirby_path: $!");
next;
}
} elsif (-z _) {
dbg("channel: file %s is empty, refreshing mirrors file", $mirby_path);
$mirby_force_reload = 1;
} elsif ($opt{'refreshmirrors'}) {
dbg("channel: --refreshmirrors used, forcing mirrors file refresh ".
"on channel $channel");
$mirby_force_reload = 1;
} elsif (time - $mirr_stat_list[9] > $IGNORE_MIRBY_OLDER_THAN) {
dbg("channel: file %s is too old, refreshing mirrors file", $mirby_path);
$mirby_file_is_ok = 1; # mirrors file seems fine, but is old
$mirby_force_reload = 1;
} else {
# mirror file $mirby_path exists, is nonempty, and is reasonably fresh
$mirby_file_is_ok = 1;
}
if (!$mirby_file_is_ok || $mirby_force_reload) {
# fetch a fresh list of mirrors
dbg("channel: DNS lookup on mirrors.$channel");
my @mirrors = do_dns_query("mirrors.$channel");
unless (@mirrors) {
warn "error: no mirror data available for channel $channel\n";
channel_failed("channel '$channel': MIRRORED.BY file URL was not in DNS");
next;
}
foreach my $mirror (@mirrors) {
my ($result_fname, $http_ok) =
http_get($mirror, $UPDDir, $mirby_path, $mirby_force_reload);
if (!$http_ok) {
dbg("channel: no mirror data available for channel %s from %s",
$channel, $mirror);
next;
}
$mirby = read_content($result_fname, 0);
if ($mirby) {
dbg("channel: MIRRORED.BY file for channel %s retrieved", $channel);
$mirby_file_is_ok = 1;
$mirby_force_reload = 0;
$preserve_files{$mirby_path} = 1;
# set file creation time to now, otherwise we'll keep refreshing
# (N.B.: curl preserves time of a downloaded file)
my $now = time;
utime($now, $now, $mirby_path)
or warn "error: error setting creation time of $mirby_path: $!\n";
last;
}
}
if ($mirby_force_reload) { # not refreshed?
warn "error: unable to refresh mirrors file for channel $channel, ".
"using old file\n";
}
}
if (!$mirby_file_is_ok) {
warn "error: no mirror data available for channel $channel\n";
channel_failed("channel '$channel': MIRRORED.BY file contents were missing");
next;
} elsif ($mirby) {
# file contents already in memory, no need to read it from a file
} elsif (!open(MIRBY, $mirby_path)) {
warn "error: error opening mirrors file $mirby_path: $!\n";
channel_failed("channel '$channel': error opening mirrors file $mirby_path: $!");
next;
} else {
dbg("channel: reading MIRRORED.BY file %s", $mirby_path);
{ local $/ = undef; $mirby = <MIRBY> }
close(MIRBY) or die "cannot close $mirby_path: $!";
$preserve_files{$mirby_path} = 1;
}
# Parse the list of mirrors
dbg("channel: parsing MIRRORED.BY file for channel %s", $channel);
my %mirrors;
my @mirrors = split(/^/, $mirby);
while(my $mirror = shift @mirrors) {
chomp $mirror;
if ( defined $opt{'forcemirror'} ) {
$mirror = $opt{'forcemirror'};
$mirrors{$mirror}->{"weight"} = 1;
dbg("channel: found mirror $mirror (forced)");
last;
}
$mirror =~ s/#.*$//; # remove comments
$mirror =~ s/^\s+//; # remove leading whitespace
$mirror =~ s/\s+$//; # remove tailing whitespace
next if $mirror eq ''; # skip empty lines
# We only support HTTP (and HTTPS) right now
if ($mirror !~ m{^https?://}i) {
dbg("channel: skipping non-HTTP mirror: $mirror");
next;
}
dbg("channel: found mirror $mirror");
my @data;
($mirror,@data) = split(/\s+/, $mirror);
$mirror =~ s{/+\z}{}; # http://example.com/updates/ -> .../updates
$mirrors{$mirror}->{weight} = 1;
foreach (@data) {
my($k,$v) = split(/=/, $_, 2);
$mirrors{$mirror}->{$k} = $v;
}
}
unless (%mirrors) {
warn "error: no mirrors available for channel $channel\n";
channel_failed("channel '$channel': no mirrors available");
next;
}
# Now that we've laid the foundation, go grab the appropriate files
#
my $path_content = File::Spec->catfile($UPDDir, "$newV.tar.gz");
my $path_sha512 = File::Spec->catfile($UPDDir, "$newV.tar.gz.sha512");
my $path_sha256 = File::Spec->catfile($UPDDir, "$newV.tar.gz.sha256");
my $path_asc = File::Spec->catfile($UPDDir, "$newV.tar.gz.asc");
# Loop through all available mirrors, choose from them randomly
# if any get fails, choose another mirror to retry _all_ files again
# sleep few seconds on retries
my $download_ok = 0;
while (my $mirror = choose_mirror(\%mirrors)) {
my ($result_fname, $http_ok);
# Grab the data hash for this mirror, then remove it from the list
my $mirror_info = $mirrors{$mirror};
delete $mirrors{$mirror};
# Make sure we start without files from existing tries
unlink($path_content);
unlink($path_sha512);
unlink($path_sha256);
unlink($path_asc);
my $sleep_sec = 2;
if (!check_mirror_af($mirror)) {
my @my_af;
push(@my_af, "IPv4") if $use_inet4;
push(@my_af, "IPv6") if $use_inet6;
push(@my_af, "no IP service") if !@my_af;
dbg("reject mirror %s: no common address family (%s), %s",
$mirror, join(" ", @my_af),
%mirrors ? "sleeping $sleep_sec sec and trying next" : 'no mirrors left');
sleep($sleep_sec) if %mirrors;
next;
}
dbg("channel: selected mirror $mirror");
# Actual archive file
($result_fname, $http_ok) = http_get("$mirror/$newV.tar.gz", $UPDDir);
if (!$http_ok || !-s $result_fname) {
dbg("channel: failed to get $newV.tar.gz from mirror $mirror, %s",
%mirrors ? "sleeping $sleep_sec sec and trying next" : 'no mirrors left');
sleep($sleep_sec) if %mirrors;
next;
}
# SHA512 of the archive file
($result_fname, $http_ok) = http_get("$mirror/$newV.tar.gz.sha512", $UPDDir);
if (!$http_ok || !-s $result_fname) {
# If not found, try SHA256 instead
($result_fname, $http_ok) = http_get("$mirror/$newV.tar.gz.sha256", $UPDDir);
if (!$http_ok || !-s $result_fname) {
dbg("channel: No sha512 or sha256 file available from $mirror, %s",
%mirrors ? "sleeping $sleep_sec sec and trying next" : 'no mirrors left');
sleep($sleep_sec) if %mirrors;
next;
}
}
# if GPG is enabled, the GPG detached signature of the archive file
if ($GPG_ENABLED) {
($result_fname, $http_ok) = http_get("$mirror/$newV.tar.gz.asc", $UPDDir);
if (!$http_ok || !-s $result_fname) {
dbg("channel: No GPG/asc file available from $mirror, %s",
%mirrors ? "sleeping $sleep_sec sec and trying next" : 'no mirrors left');
sleep($sleep_sec) if %mirrors;
next;
}
}
$download_ok = 1;
last;
}
if ($download_ok) {
if (-s $path_content) {
$content = read_content($path_content, 1); # binary
$preserve_files{$path_content} = 1;
}
if (-s $path_sha512) {
$SHA512 = read_content($path_sha512, 0); # ascii
$preserve_files{$path_sha512} = 1;
}
if (-s $path_sha256) {
$SHA256 = read_content($path_sha256, 0); # ascii
$preserve_files{$path_sha256} = 1;
}
if (-s $path_asc) {
$GPG = read_content($path_asc, 0); # ascii
$preserve_files{$path_asc} = 1;
}
}
}
unless ($content && ( $SHA512 || $SHA256 ) && (!$GPG_ENABLED || $GPG)) {
channel_failed("channel '$channel': could not find working mirror");
next;
}
if ( $SHA512 ) {
# Validate the SHA512 signature
{ local($1);
$SHA512 =~ /^([a-fA-F0-9]{128})\b/;
$SHA512 = defined $1 ? lc($1) : 'INVALID';
}
my $digest = sha512_hex($content);
dbg("sha512: verification wanted: $SHA512");
dbg("sha512: verification result: $digest");
unless ($digest eq $SHA512) {
channel_failed("channel '$channel': SHA512 verification failed");
next;
}
}
if ( $SHA256 ) {
# Validate the SHA256 signature
{ local($1);
$SHA256 =~ /^([a-fA-F0-9]{64})\b/;
$SHA256 = defined $1 ? lc($1) : 'INVALID';
}
my $digest = sha256_hex($content);
dbg("sha256: verification wanted: $SHA256");
dbg("sha256: verification result: $digest");
unless ($digest eq $SHA256) {
channel_failed("channel '$channel': SHA256 verification failed");
next;
}
}
# Write the content out to a temp file for GPG/Archive::Tar interaction
dbg("channel: populating temp content file %s", $content_file);
open(TMP, ">$content_file")
or die "fatal: cannot create content temp file $content_file: $!\n";
binmode TMP
or die "fatal: cannot set binmode on content temp file $content_file: $!\n";
print TMP $content
or die "fatal: cannot write to content temp file $content_file: $!\n";
close TMP
or die "fatal: cannot close content temp file $content_file: $!\n";
# to sign : gpg -bas file
# to verify: gpg --verify --batch --no-tty --status-fd=1 -q --logger-fd=1 file.asc file
# look for : [GNUPG:] GOODSIG 6C55397824F434CE updates.spamassassin.org [...]
# [GNUPG:] VALIDSIG 0C2B1D7175B852C64B3CDC716C55397824F434CE [...]
# [GNUPG:] NO_PUBKEY 6C55397824F434CE
if ($GPG) {
dbg("gpg: populating temp signature file");
my $sig_file;
($sig_file, $tfh) = secure_tmpfile();
$tfh
or die "fatal: couldn't create temp file for GPG signature: $!\n";
binmode $tfh
or die "fatal: cannot set binmode on temp file for GPG signature: $!\n";
print $tfh $GPG
or die "fatal: cannot write temp file for GPG signature: $!\n";
close $tfh
or die "fatal: cannot close temp file for GPG signature: $!\n";
undef $tfh;
dbg("gpg: calling gpg");
my $gpghome = interpolate_gpghomedir();
# TODO: we could also use "--keyserver pgp.mit.edu" or similar,
# to autodownload missing keys...
my $CMD = "$GPGPath $gpghome --verify --batch ".
"--no-tty --status-fd=1 -q --logger-fd=1";
unless (open(CMD, "$CMD $sig_file $content_file|")) {
unlink $sig_file or warn "error: cannot unlink $sig_file: $!\n";
die "fatal: couldn't execute $GPGPath: $!\n";
}
# Determine the fate of the signature
my $signer = '';
my $missingkeys = '';
while(my $GNUPG = <CMD>) {
chop $GNUPG;
dbg ("gpg: $GNUPG");
if ($GNUPG =~ /^gpg: fatal:/) {
warn $GNUPG."\n"; # report bad news
}
local($1);
if ($GNUPG =~ /^\Q[GNUPG:]\E NO_PUBKEY \S+(\S{8})$/) {
$missingkeys .= $1." ";
}
next unless ($GNUPG =~ /^\Q[GNUPG:]\E (?:VALID|GOOD)SIG (\S{8,40})/);
my $key = $1;
# we want either a keyid (8) or a fingerprint (40)
if (length $key > 8 && length $key < 40) {
substr($key, 8) = '';
}
# use the longest match we can find
$signer = $key if length $key > length $signer;
}
my $errno = 0; close CMD or $errno = $!;
proc_status_ok($?,$errno)
or warn("gpg: process '$GPGPath' finished: ".
exit_status_str($?,$errno)."\n");
unlink $sig_file or warn "cannot unlink $sig_file: $!\n";
if ($signer) {
my $keyid = substr $signer, -8;
dbg("gpg: found signature made by key $signer");
if (exists $valid_GPG{$signer}) {
dbg("gpg: key id $signer is release trusted");
}
elsif (exists $valid_GPG{$keyid}) {
dbg("gpg: key id $keyid is release trusted");
}
else {
dbg("gpg: key id $keyid is not release trusted");
$signer = undef;
}
}
unless ($signer) {
warn "error: GPG validation failed!\n";
if ($missingkeys) {
warn <<ENDOFVALIDATIONERR;
The update downloaded successfully, but it was not signed with a trusted GPG
key. Instead, it was signed with the following keys: