From 08d9f95505bb11c3d1b6a8c649362ede7dab4138 Mon Sep 17 00:00:00 2001 From: Guilhem Moulin Date: Mon, 13 Jun 2016 23:14:00 +0200 Subject: =?UTF-8?q?Rename=20=E2=80=98letsencrypt-tiny=E2=80=99=20to=20?= =?UTF-8?q?=E2=80=98lacme=E2=80=99.?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- lacme | 705 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 705 insertions(+) create mode 100755 lacme (limited to 'lacme') diff --git a/lacme b/lacme new file mode 100755 index 0000000..12fb181 --- /dev/null +++ b/lacme @@ -0,0 +1,705 @@ +#!/usr/bin/perl -T + +#---------------------------------------------------------------------- +# ACME client +# Copyright © 2016 Guilhem Moulin +# +# This program is free software: you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation, either version 3 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see . +#---------------------------------------------------------------------- + +use strict; +use warnings; + +our $VERSION = '0.0.1'; +my $NAME = 'lacme'; + +use Errno qw/EADDRINUSE EINTR/; +use Fcntl qw/F_GETFD F_SETFD FD_CLOEXEC SEEK_SET/; +use File::Temp (); +use Getopt::Long qw/:config posix_default no_ignore_case gnu_getopt auto_version/; +use List::Util 'first'; +use POSIX (); +use Socket qw/PF_INET PF_INET6 PF_UNIX INADDR_ANY IN6ADDR_ANY + SOCK_STREAM SOL_SOCKET SO_REUSEADDR SHUT_RDWR/; + +use Config::Tiny (); +use Net::SSLeay (); + +# Clean up PATH +$ENV{PATH} = join ':', qw{/usr/bin /bin}; +delete @ENV{qw/IFS CDPATH ENV BASH_ENV/}; + +my ($COMMAND, %OPTS, $CONFFILE, $CONFIG, @CLEANUP); +$SIG{$_} = sub() { exit 1 } foreach qw/INT TERM/; # run the END block upon SIGINT/SIGTERM + + +############################################################################# +# Parse and validate configuration +# +sub usage(;$$) { + my $rv = shift // 0; + if ($rv) { + my $msg = shift; + print STDERR $msg."\n" if defined $msg; + print STDERR "Try '$NAME --help' or consult the manpage for more information.\n"; + } + else { + print STDERR "Usage: $NAME [--config=FILE] [--socket=PATH] [OPTIONS] COMMAND [ARGUMENT ..]\n" + ."Consult the manpage for more information.\n"; + } + exit $rv; +} +usage(1) unless GetOptions(\%OPTS, qw/config=s config-certs=s socket=s agreement-uri=s debug help|h/); +usage(0) if $OPTS{help}; + +$COMMAND = shift(@ARGV) // usage(1, "Missing command"); +$COMMAND = $COMMAND =~ /\A(new-reg|reg=\p{Print}*|new-cert|revoke-cert)\z/ ? $1 + : usage(1, "Invalid command: $COMMAND"); # validate and untaint $COMMAND +@ARGV = map { /\A(\p{Print}*)\z/ ? $1 : die } @ARGV; # untaint @ARGV + +do { + my $conffile = $OPTS{config} // first { -f $_ } + ( "./$NAME.conf" + , ($ENV{XDG_CONFIG_HOME} // "$ENV{HOME}/.config")."/lacme/$NAME.conf" + , "/etc/lacme/$NAME.conf" + ); + die "Error: Can't find configuration file\n" unless defined $conffile; + print STDERR "Using configuration file: $conffile\n" if $OPTS{debug}; + open $CONFFILE, '<', $conffile or die "Can't open $conffile: $!\n"; + my $conf = do { local $/ = undef, <$CONFFILE> }; + # don't close $CONFFILE so we can pass it to the client + + my $h = Config::Tiny::->read_string($conf) or die Config::Tiny::->errstr()."\n"; + my $defaults = delete $h->{_} // {}; + my %valid = ( + client => { + socket => (defined $ENV{XDG_RUNTIME_DIR} ? "$ENV{XDG_RUNTIME_DIR}/S.lacme" : undef), + user => 'nobody', + group => 'nogroup', + command => '/usr/lib/lacme/client', + # the rest is for the ACME client + map {$_ => undef} qw/server timeout SSL_verify SSL_version SSL_cipher_list/ + }, + webserver => { + listen => ':80', + 'challenge-directory' => '/var/www/acme-challenge', + user => 'www-data', + group => 'www-data', + command => '/usr/lib/lacme/webserver', + iptables => 'Yes' + + } + ); + foreach my $s (keys %valid) { + my $h = delete $h->{$s} // {}; + my %v = map { $_ => delete $h->{$_} // $valid{$s}->{$_} } keys %{$valid{$s}}; + die "Unknown option(s) in [$s]: ".join(', ', keys %$h)."\n" if %$h; + $h->{$_} //= $defaults->{$_} foreach keys %$defaults; + $CONFIG->{$s} = \%v; + } + die "Invalid section(s): ".join(', ', keys %$h)."\n" if %$h; + $CONFIG->{_} = $defaults; +}; + +# Regular expressions for domain validation +my $RE_LABEL = qr/[0-9a-z](?:[0-9a-z\x2D]{0,61}[0-9a-z])?/aai; +my $RE_DOMAIN = qr/$RE_LABEL(?:\.$RE_LABEL)+/; + + +############################################################################# +# Generate a Certificate Signing Request (in DER format) +# +sub gen_csr(%) { + my %args = @_; + return unless defined $args{'certificate-key'} and defined $args{subject}; + return if defined $args{hash} and !grep { $args{hash} eq $_ } qw/md5 rmd160 sha1 sha224 sha256 sha384 sha512/; + + my $config = File::Temp::->new(SUFFIX => '.conf', TMPDIR => 1) // die; + $config->print( + "[ req ]\n", + "distinguished_name = req_distinguished_name\n", + "req_extensions = v3_req\n", + + "[ req_distinguished_name ]\n", + + "[ v3_req ]\n", + # XXX Golang errors on extensions marked critical + # https://github.com/letsencrypt/boulder/issues/565 + #"basicConstraints = critical, CA:FALSE\n", + "basicConstraints = CA:FALSE\n", + "subjectKeyIdentifier = hash\n" + ); + #$config->print("keyUsage = critical, $args{keyUsage}\n") if defined $args{keyUsage}; + $config->print("keyUsage = $args{keyUsage}\n") if defined $args{keyUsage}; + $config->print("subjectAltName = $args{subjectAltName}\n") if defined $args{subjectAltName}; + $config->close() or die "Can't close: $!"; + + my @args = (qw/-new -batch -key/, $args{'certificate-key'}); + push @args, "-$args{hash}" if defined $args{hash}; + push @args, '-subj', $args{subject}, '-config', $config->filename(), qw/-reqexts v3_req/; + + open my $fh, '-|', qw/openssl req -outform DER/, @args or die "fork: $!"; + my $csr = do { local $/ = undef; <$fh> }; + close $fh or $! ? die "Can't close: $!" : return; + + if ($OPTS{debug}) { + # print out the CSR in text form + pipe my $rd, my $wd or die "pipe: $!"; + my $pid = fork // die "fork: $!"; + unless ($pid) { + open STDIN, '<&', $rd or die "Can't dup: $!"; + open STDOUT, '>&', \*STDERR or die "Can't dup: $!"; + exec qw/openssl req -noout -text -inform DER/ or die; + } + $rd->close() or die "Can't close: $!"; + $wd->print($csr); + $wd->close() or die "Can't close: $!"; + + waitpid $pid => 0; + die $? if $? > 0; + } + + return $csr; +} + + +############################################################################# +# Get the timestamp of the given cert's expiration date. +# Internally the expiration date is stored as a RFC3339 string (such as +# yyyy-mm-ddThh:mm:ssZ); we convert it to a timestamp manually. +# +sub x509_enddate($) { + my $filename = shift; + my ($bio, $x509, $time, $dt); + + $bio = Net::SSLeay::BIO_new_file($filename, 'r'); + $x509 = Net::SSLeay::PEM_read_bio_X509($bio) if defined $bio; + $time = Net::SSLeay::X509_get_notAfter($x509) if defined $x509; + $dt = Net::SSLeay::P_ASN1_TIME_get_isotime($time) if defined $time; + + my $t; + if (defined $dt and $dt =~ s/\A(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2})//) { + # RFC3339 datetime strings; assume epoch is on January 1 of $epoch_year + my ($y, $m, $d, $h, $min, $s) = ($1, $2, $3, $4, $5, $6); + my (undef,undef,undef,undef,undef,$epoch_year,undef,undef,undef) = gmtime(0); + $t = 0; + foreach (($epoch_year+1900) .. $y-1) { + $t += 365*86400; + $t += 86400 if ($_ % 4 == 0 and $_ % 100 != 0) or ($_ % 400 == 0); # leap + } + + if ($m > 1) { + my @m = (31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31); + $m[1]++ if ($y % 4 == 0 and $y % 100 != 0) or ($y % 400 == 0); # leap + $t += 86400*$m[$_] for (0 .. $m-2); + } + + $t += 86400*($d-1); + $t += $s + 60*($min + 60*$h); + + $dt =~ s/\A\.(\d{1,9})\d*//; # ignore nanosecs + + if ($dt =~ /\A([+-])(\d{2}):(\d{2})\z/) { + my $tz = 60*($3 + 60*$2); + $t = $1 eq '-' ? ($t+$tz) : ($t-$tz); + } + } + + Net::SSLeay::X509_free($x509) if defined $x509; + Net::SSLeay::BIO_free($bio) if defined $bio; + return $t; +} + + +############################################################################# +# Drop privileges and chdir afterwards +# +sub drop_privileges($$$) { + my ($user, $group, $dir) = @_; + + # set effective and real gid; also set the list of supplementary gids to that single gid + if ($group ne '') { + my $gid = getgrnam($group) // die "Can't getgrnam($group): $!"; + $) = "$gid $gid"; + die "Can't setgroups: $!" if $@; + POSIX::setgid($gid) or die "Can't setgid: $!"; + die "Couldn't setgid/setguid" unless $( eq "$gid $gid" and $) eq "$gid $gid"; # safety check + } + + # set effective and real uid + if ($user ne '') { + my $uid = getpwnam($user) // die "Can't getpwnam($user): $!"; + POSIX::setuid($uid) or die "Can't setuid: $!"; + die "Couldn't setuid/seteuid" unless $< == $uid and $> == $uid; # safety check + } + + chdir $dir or die "Can't chdir to $dir: $!"; +} + + +############################################################################# +# Ensure the FD_CLOEXEC bit is $set on $fd +# +sub set_FD_CLOEXEC($$) { + my ($fd, $set) = @_; + my $flags = fcntl($fd, F_GETFD, 0) or die "Can't fcntl F_GETFD: $!"; + my $flags2 = $set ? ($flags | FD_CLOEXEC) : ($flags & ~FD_CLOEXEC); + return if $flags == $flags2; + fcntl($fd, F_SETFD, $flags2) or die "Can't fcntl F_SETFD: $!"; +} + + +############################################################################# +# Try to spawn a webserver to serve ACME challenges, and return the +# temporary challenge directory. +# If a webserver is already listening, symlink the 'challenge-directory' +# configuration option to the temporary challenge directory. +# Otherwise, bind(2) a socket, pass its fileno to the webserver +# component, and optionally install iptables rules. +# +sub spawn_webserver() { + # create a temporary directory; give write access to the ACME client + # and read access to the webserver + my $tmpdir = File::Temp::->newdir(CLEANUP => 1, TMPDIR => 1) // die; + chmod 0755, $tmpdir or die "Can't chmod: $!"; + if ((my $username = $CONFIG->{client}->{user}) ne '') { + my $uid = getpwnam($username) // die "Can't getgrnam($username): $!"; + chown($uid, -1, $tmpdir) or die "Can't chown: $!"; + } + + my $conf = $CONFIG->{webserver}; + my ($fam, $addr, $port) = (PF_INET, $conf->{listen}, 80); + $port = $1 if $addr =~ s/:(\d+)$//; + $addr = Socket::inet_ntop(PF_INET, INADDR_ANY) if $addr eq ''; + $fam = PF_INET6 if $addr =~ s/^\[(.+)\]$/$1/; + + my $proto = getprotobyname("tcp") // die; + socket(my $srv, $fam, SOCK_STREAM, $proto) or die "socket: $!"; + setsockopt($srv, SOL_SOCKET, SO_REUSEADDR, pack("l", 1)) or die "setsockopt: $!"; + $addr = Socket::inet_pton($fam, $addr) // die "Invalid address $conf->{listen}\n"; + my $sockaddr = $fam == PF_INET ? Socket::pack_sockaddr_in($port, $addr) + : $fam == PF_INET6 ? Socket::pack_sockaddr_in6($port, $addr) + : die; + + # try to bind aginst the specified address:port + bind($srv, $sockaddr) or do { + die "Can't bind to $conf->{listen}: $!" if $! != EADDRINUSE; + print STDERR "[$$] Using existing webserver on $conf->{listen}\n" if $OPTS{debug}; + my $dir = $conf->{'challenge-directory'}; + symlink $tmpdir, $dir or die "Can't symlink $dir -> $tmpdir: $!"; + push @CLEANUP, sub() { + print STDERR "Unlinking $dir\n" if $OPTS{debug}; + unlink $dir or warn "Warning: Can't unlink $dir: $!"; + }; + return $tmpdir; + }; + listen($srv, 5) or die "listen: $!"; + + # spawn the webserver component + my $pid = fork() // "fork: $!"; + unless ($pid) { + drop_privileges($conf->{user}, $conf->{group}, $tmpdir); + set_FD_CLOEXEC($srv, 0); + $ENV{DEBUG} = $OPTS{debug}; + # use execve(2) rather than a Perl pseudo-process to ensure that + # the child doesn't have access to the parent's memory + exec $conf->{command}, fileno($srv) or die; + } + + print STDERR "[$$] Forking ACME webserver, child PID $pid\n" if $OPTS{debug}; + set_FD_CLOEXEC($srv, 1); + push @CLEANUP, sub() { + print STDERR "[$$] Shutting down ACME webserver\n" if $OPTS{debug}; + shutdown($srv, SHUT_RDWR) or warn "shutdown: $!"; + kill 15 => $pid; + waitpid $pid => 0; + }; + + return $tmpdir if lc ($conf->{iptables} // 'Yes') eq 'no'; + + # install iptables + my $iptables_bin = $fam == PF_INET ? 'iptables' : $fam == PF_INET6 ? 'ip6tables' : die; + my $iptables_tmp = File::Temp::->new(TMPDIR => 1) // die; + set_FD_CLOEXEC($iptables_tmp, 1); + + my $pid2 = fork() // die "fork: $!"; + unless ($pid2) { + open STDIN, '<', '/dev/null' or die "Can't open /dev/null: $!"; + open STDOUT, '>&', $iptables_tmp or die "Can't dup: $!"; + $| = 1; # turn off buffering for STDOUT + exec "/sbin/$iptables_bin-save", "-c" or die; + } + waitpid $pid2 => 0; + die "Error: /sbin/$iptables_bin-save exited with value ".($? >> 8) if $? > 0; + + # seek back to the begining, as we'll restore directly from the + # handle and not from the file. XXX if there was a way in Perl to + # use open(2) with the O_TMPFILE flag we would use that to avoid + # creating a file to start with + seek($iptables_tmp, SEEK_SET, 0) or die "Can't seek: $!"; + + push @CLEANUP, sub() { + print STDERR "[$$] Restoring iptables\n" if $OPTS{debug}; + my $pid2 = fork() // die "fork: $!"; + unless ($pid2) { + open STDIN, '<&', $iptables_tmp or die "Can't dup: $!"; + open STDOUT, '>', '/dev/null' or die "Can't open /dev/null: $!"; + exec "/sbin/$iptables_bin-restore", "-c" or die; + } + waitpid $pid2 => 0; + warn "Warning: /sbin/$iptables_bin-restore exited with value ".($? >> 8) if $? > 0; + }; + + # it's safe to install the new iptables to open $port now that the + # restore hook is in place + my $mask = $fam == PF_INET ? ($addr eq INADDR_ANY ? '0' : '32') + : $fam == PF_INET6 ? ($addr eq IN6ADDR_ANY ? '0' : '128') + : die; + my $dest = Socket::inet_ntop($fam, $addr) .'/'. $mask; + + system ("/sbin/$iptables_bin", qw/-I INPUT -p tcp -m tcp -m state/, + '-d', $dest, '--dport', $port, + '--state', 'NEW,ESTABLISHED', '-j', 'ACCEPT') == 0 or die; + system ("/sbin/$iptables_bin", qw/-I OUTPUT -p tcp -m tcp -m state/, + '-s', $dest, '--sport', $port, + '--state', 'ESTABLISHED', '-j', 'ACCEPT') == 0 or die; + + return $tmpdir; +} + + +############################################################################# +# Spawn the client component, and wait for it to return. +# If $args->{in} is defined, the data is written to the client's STDIN. +# If $args->{out} is defined, its value is set to client's STDOUT data. +# +sub acme_client($@) { + my $args = shift; + my @args = @_; + + my @stat; + my $conf = $CONFIG->{client}; + my $sockname = $OPTS{socket} // $conf->{socket} // die "Missing socket option\n"; + $sockname = $sockname =~ /\A(\p{Print}+)\z/ ? $1 : die "Invalid socket name\n"; # untaint $sockname + + # ensure we're the only user with write access to the parent dir + my $dirname = $sockname =~ s/[^\/]+$//r; + @stat = stat($dirname) or die "Can't stat $dirname: $!"; + die "Error: insecure permissions on $dirname\n" if ($stat[2] & 0022) != 0; + + # ensure we're the only user with read/write access to the socket + @stat = stat($sockname) or die "Can't stat $sockname: $! (Is lacme-accountd running?)\n"; + die "Error: insecure permissions on $sockname\n" if ($stat[2] & 0066) != 0; + + # connect(2) to the socket + socket(my $client, PF_UNIX, SOCK_STREAM, 0) or die "socket: $!"; + my $sockaddr = Socket::sockaddr_un($sockname) // die "Invalid address $sockname\n"; + until (connect($client, $sockaddr)) { + next if $! == EINTR; # try again if connect(2) was interrupted by a signal + die "connect: $!"; + } + + # use execve(2) rather than a Perl pseudo-process to ensure that the + # child doesn't have access to the parent's memory + my @fileno = map { fileno($_) =~ /^(\d+)$/ ? $1 : die } ($CONFFILE, $client); # untaint fileno + spawn({%$args{qw/in out/}, child => sub() { + drop_privileges($conf->{user}, $conf->{group}, $args->{chdir} // '/'); + set_FD_CLOEXEC($_, 0) foreach ($CONFFILE, $client); + seek($CONFFILE, SEEK_SET, 0) or die "Can't seek: $!"; + $ENV{DEBUG} = $OPTS{debug}; + }}, $conf->{command}, $COMMAND, @fileno, @args); +} + +sub spawn($@) { + my $args = shift; + my @exec = @_; + + # create communication pipes if needed + my ($in_rd, $in_wd, $out_rd, $out_wd); + if (defined $args->{in}) { + pipe $in_rd, $in_wd or die "pipe: $!"; + } + if (defined $args->{out}) { + pipe $out_rd, $out_wd or die "pipe: $!"; + } + + my $pid = fork() // "fork: $!"; + unless ($pid) { + # child + $args->{child}->() if defined $args->{child}; + if (defined $args->{in}) { + close $in_wd or die "Can't close: $!"; + open STDIN, '<&', $in_rd or die "Can't dup: $!"; + } else { + open STDIN, '<', '/dev/null' or die "Can't open /dev/null: $!"; + } + if (defined $args->{out}) { + close $out_rd or die "Can't close: $!"; + open STDOUT, '>&', $out_wd or die "Can't dup: $!"; + } else { + open STDOUT, '>', '/dev/null' or die "Can't open /dev/null: $!"; + } + exec { $exec[0] } @exec or die; + } + push @CLEANUP, sub() { + kill 15 => $pid; + waitpid $pid => 0; + }; + + # parent + print STDERR "[$$] Forking $exec[0], child PID $pid\n" if $OPTS{debug}; + if (defined $args->{in}) { + $in_rd->close() or die "Can't close: $!"; + $in_wd->print($args->{in}); + $in_wd->close() or die "Can't close: $!"; + } + if (defined $args->{out}) { + $out_wd->close() or die "Can't close: $!"; + ${$args->{out}} = do { local $/ = undef; $out_rd->getline() }; + $out_rd->close() or die "Can't close: $!"; + } + waitpid $pid => 0; + pop @CLEANUP; + undef ${$args->{out}} if defined $args->{out} and $? > 0; + return $? > 255 ? ($? >> 8) : $? > 0 ? 1 : 0; +} + + +############################################################################# +# Install the certificate +# +sub install_cert($$@) { + my $filename = shift; + my $x509 = shift; + + open my $fh, '>', $filename or die "Can't open $filename: $!"; + print $fh $x509; + foreach (@_) { # append the chain + open my $fh2, '<', $_ or die "Can't open $_: $!"; + my $ca = do { local $/ = undef; $fh2->getline() }; + print $fh $ca; + close $fh2 or die "Can't close: $!"; + } + close $fh or die "Can't close: $!"; +} + + +############################################################################# +# new-reg [--agreement-uri=URI] [CONTACT ..] +# reg=URI [--agreement-uri=URI] [CONTACT ..] +# +if ($COMMAND eq 'new-reg' or $COMMAND =~ /^reg=/) { + die "Invalid registration URI (use the 'new-reg' command to determine the URI)\n" + if $COMMAND eq 'reg='; + $OPTS{'agreement-uri'} = $OPTS{'agreement-uri'} =~ /\A(\p{Print}+)\z/ ? $1 + : die "Invalid value for --agreement-uri\n" + if defined $OPTS{'agreement-uri'}; + + unshift @ARGV, ($OPTS{'agreement-uri'} // ''); + exit acme_client({}, @ARGV); +} + + +############################################################################# +# new-cert [SECTION ..] +# TODO: renewal without the account key, see +# https://github.com/letsencrypt/acme-spec/pull/168 +# https://github.com/letsencrypt/acme-spec/issues/191 +# +elsif ($COMMAND eq 'new-cert') { + my $conf; + do { + my $conffile = $OPTS{'config-certs'} // $CONFIG->{_}->{'config-certs'} // first { -f $_ } + ( "./$NAME-certs.conf" + , ($ENV{XDG_CONFIG_HOME} // "$ENV{HOME}/.config")."/lacme/$NAME-certs.conf" + , "/etc/lacme/$NAME-certs.conf" + ); + die "Error: Can't find certificate configuration file\n" unless defined $conffile; + my $h = Config::Tiny::->read($conffile) or die Config::Tiny::->errstr()."\n"; + my $defaults = delete $h->{_} // {}; + my @valid = qw/certificate certificate-chain certificate-key min-days CAfile + hash keyUsage subject subjectAltName chown chmod notify/; + foreach my $s (keys %$h) { + $conf->{$s} = { map { $_ => delete $h->{$s}->{$_} } @valid }; + die "Unknown option(s) in [$s]: ".join(', ', keys %{$h->{$s}})."\n" if %{$h->{$s}}; + $conf->{$s}->{$_} //= $defaults->{$_} foreach keys %$defaults; + } + }; + + my $challenge_dir; + my $rv = 0; + foreach my $s (@ARGV ? @ARGV : keys %$conf) { + my $conf = $conf->{$s} // do { + print STDERR "Warning: No such section $s, skipping\n"; + $rv = 1; + next; + }; + + my $certtype = first { defined $conf->{$_} } qw/certificate certificate-chain/; + unless (defined $certtype) { + print STDERR "[$s] Warning: Missing 'certificate' and 'certificate-chain', skipping\n"; + $rv = 1; + next; + } + + # skip certificates that expire at least $conf->{'min-days'} days in the future + if (-f $conf->{$certtype} and defined (my $t = x509_enddate($conf->{$certtype}))) { + my $d = $conf->{'min-days'} // 10; + if ($d > 0 and $t - time > $d*86400) { + my $d = POSIX::strftime('%Y-%m-%d %H:%M:%S UTC', gmtime($t)); + print STDERR "[$s] Valid until $d, skipping\n"; + next; + } + } + + # generate the CSR + my $csr = gen_csr(%$conf{qw/certificate-key subject subjectAltName keyUsage hash/}) // do { + print STDERR "[$s] Warning: Couldn't generate CSR, skipping\n"; + $rv = 1; + next; + }; + + # spawn the webserver if not done already + $challenge_dir //= spawn_webserver(); + + # list all authorization domains to request + my @authz; + push @authz, $1 if defined $conf->{subject} =~ /\A.*\/CN=($RE_DOMAIN)\z/o; + if (defined $conf->{subjectAltName}) { + foreach my $d (split /,/, $conf->{subjectAltName}) { + next unless $d =~ s/\A\s*DNS://; + if ($d =~ /\A$RE_DOMAIN\z/o) { + push @authz, $d unless grep {$_ eq $d} @authz; + } else { + print STDERR "[$s] Warning: Ignoring invalid domain $d\n"; + } + } + } + + my ($x509, $csr_pubkey, $x509_pubkey); + print STDERR "[$s] Will request authorization for: ".join(", ", @authz), "\n" if $OPTS{debug}; + if (acme_client({chdir => $challenge_dir, in => $csr, out => \$x509}, @authz)) { + print STDERR "[$s] Error: Couldn't issue X.509 certificate!\n"; + $rv = 1; + next; + } + + # extract pubkeys from CSR and cert, and ensure they match + spawn({in => $csr, out => \$csr_pubkey }, qw/openssl req -inform DER -noout -pubkey/); + spawn({in => $x509, out => \$x509_pubkey}, qw/openssl x509 -inform PEM -noout -pubkey/); + unless (defined $x509_pubkey and defined $csr_pubkey and $x509_pubkey eq $csr_pubkey) { + print STDERR "[$s] Error: Received bogus X.509 certificate from ACME server!\n"; + $rv = 1; + next; + }; + + # verify certificate validity against the CA + $conf->{CAfile} //= '/usr/share/lacme/lets-encrypt-x3-cross-signed.pem'; + if ($conf->{CAfile} ne '' and spawn({in => $x509}, 'openssl', 'verify', '-CAfile', $conf->{CAfile}, + qw/-purpose sslserver -x509_strict/)) { + print STDERR "[$s] Error: Received invalid X.509 certificate from ACME server!\n"; + $rv = 1; + next; + } + + # install certificate + if (defined $conf->{'certificate'}) { + print STDERR "Installing X.509 certificate $conf->{'certificate'}\n"; + install_cert($conf->{'certificate'}, $x509); + } + if (defined $conf->{'certificate-chain'}) { + print STDERR "Installing X.509 certificate chain $conf->{'certificate-chain'}\n"; + install_cert($conf->{'certificate-chain'}, $x509, $conf->{CAfile}); + } + + if (defined $conf->{chown}) { + my ($user, $group) = split /:/, $conf->{chown}, 2; + my $uid = getpwnam($user) // die "Can't getpwnam($user): $!"; + my $gid = defined $group ? (getgrnam($group) // die "Can't getgrnam($group): $!") : -1; + foreach (grep defined, @$conf{qw/certificate certificate-chain/}) { + chown($uid, $gid, $_) or die "Can't chown: $!"; + } + } + if (defined $conf->{chmod}) { + my $mode = oct($conf->{chmod}) // die; + foreach (grep defined, @$conf{qw/certificate certificate-chain/}) { + chmod($mode, $_) or die "Can't chown: $!"; + } + } + + my @certopts = join ',', qw/no_header no_version no_pubkey no_sigdump/; + open my $fh, '|-', qw/openssl x509 -noout -fingerprint -sha256 -text -certopt/, @certopts + or die "fork: $!"; + print $fh $x509; + close $fh or die $! ? + "Can't close: $!" : + "Error: x509(1ssl) exited with value ".($? >> 8)."\n"; + + if (defined $conf->{notify}) { + print STDERR "Running notification command `$conf->{notify}`\n"; + if (system($conf->{notify}) != 0) { + print STDERR "Warning: notification command exited with value ".($? >> 8)."\n"; + $rv = 1; + } + } + } + undef $challenge_dir; + exit $rv; +} + + +############################################################################# +# revoke-cert FILE [FILE ..] +# +elsif ($COMMAND eq 'revoke-cert') { + die "Nothing to revoke\n" unless @ARGV; + my $rv = 0; + foreach my $filename (@ARGV) { + print STDERR "Revoking $filename\n"; + + # conversion PEM -> DER + open my $fh, '-|', qw/openssl x509 -outform DER -in/, $filename or die "fork: $!"; + my $der = do { local $/ = undef; <$fh> }; + close $fh or die $! ? + "Can't close: $!" : + "Error: x509(1ssl) exited with value ".($? >> 8)."\n"; + + my @certopts = join ',', qw/no_header no_version no_pubkey no_sigdump no_extensions/; + open my $fh2, '|-', qw/openssl x509 -inform DER -noout -fingerprint -sha256 -text -certopt/, @certopts + or die "fork: $!"; + print $fh2 $der; + close $fh2 or die $! ? + "Can't close: $!" : + "Error: x509(1ssl) exited with value ".($? >> 8)."\n"; + + if (acme_client({in => $der})) { + print STDERR "Warning: Couldn't revoke $filename\n"; + $rv = 1; + } + } + exit $rv; +} + + +############################################################################# +# +else { + die "Unknown command $COMMAND" +} + + +END { + local $?; + $_->() foreach reverse @CLEANUP; +} -- cgit v1.2.3