500 lines
17 KiB
Perl
Executable File
500 lines
17 KiB
Perl
Executable File
#!/usr/bin/perl -w
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# ***************************************************************************
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# * _ _ ____ _
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# * Project ___| | | | _ \| |
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# * / __| | | | |_) | |
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# * | (__| |_| | _ <| |___
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# * \___|\___/|_| \_\_____|
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# *
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# * Copyright (C) 1998 - 2014, Daniel Stenberg, <daniel@haxx.se>, et al.
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# *
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# * This software is licensed as described in the file COPYING, which
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# * you should have received as part of this distribution. The terms
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# * are also available at http://curl.haxx.se/docs/copyright.html.
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# *
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# * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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# * copies of the Software, and permit persons to whom the Software is
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# * furnished to do so, under the terms of the COPYING file.
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# *
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# * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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# * KIND, either express or implied.
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# *
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# ***************************************************************************
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# This Perl script creates a fresh ca-bundle.crt file for use with libcurl.
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# It downloads certdata.txt from Mozilla's source tree (see URL below),
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# then parses certdata.txt and extracts CA Root Certificates into PEM format.
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# These are then processed with the OpenSSL commandline tool to produce the
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# final ca-bundle.crt file.
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# The script is based on the parse-certs script written by Roland Krikava.
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# This Perl script works on almost any platform since its only external
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# dependency is the OpenSSL commandline tool for optional text listing.
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# Hacked by Guenter Knauf.
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#
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use Getopt::Std;
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use MIME::Base64;
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use LWP::UserAgent;
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use strict;
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use vars qw($opt_b $opt_d $opt_f $opt_h $opt_i $opt_l $opt_n $opt_p $opt_q $opt_s $opt_t $opt_u $opt_v $opt_w);
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use List::Util;
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use Text::Wrap;
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my $MOD_SHA = "Digest::SHA";
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eval "require $MOD_SHA";
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if ($@) {
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$MOD_SHA = "Digest::SHA::PurePerl";
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eval "require $MOD_SHA";
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}
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my %urls = (
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'nss' =>
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'http://hg.mozilla.org/projects/nss/raw-file/tip/lib/ckfw/builtins/certdata.txt',
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'central' =>
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'http://hg.mozilla.org/mozilla-central/raw-file/default/security/nss/lib/ckfw/builtins/certdata.txt',
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'aurora' =>
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'http://hg.mozilla.org/releases/mozilla-aurora/raw-file/default/security/nss/lib/ckfw/builtins/certdata.txt',
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'beta' =>
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'http://hg.mozilla.org/releases/mozilla-beta/raw-file/default/security/nss/lib/ckfw/builtins/certdata.txt',
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'release' =>
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'http://hg.mozilla.org/releases/mozilla-release/raw-file/default/security/nss/lib/ckfw/builtins/certdata.txt',
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);
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$opt_d = 'release';
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# If the OpenSSL commandline is not in search path you can configure it here!
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my $openssl = 'openssl';
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my $version = '1.25';
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$opt_w = 76; # default base64 encoded lines length
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# default cert types to include in the output (default is to include CAs which may issue SSL server certs)
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my $default_mozilla_trust_purposes = "SERVER_AUTH";
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my $default_mozilla_trust_levels = "TRUSTED_DELEGATOR";
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$opt_p = $default_mozilla_trust_purposes . ":" . $default_mozilla_trust_levels;
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my @valid_mozilla_trust_purposes = (
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"DIGITAL_SIGNATURE",
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"NON_REPUDIATION",
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"KEY_ENCIPHERMENT",
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"DATA_ENCIPHERMENT",
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"KEY_AGREEMENT",
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"KEY_CERT_SIGN",
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"CRL_SIGN",
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"SERVER_AUTH",
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"CLIENT_AUTH",
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"CODE_SIGNING",
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"EMAIL_PROTECTION",
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"IPSEC_END_SYSTEM",
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"IPSEC_TUNNEL",
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"IPSEC_USER",
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"TIME_STAMPING",
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"STEP_UP_APPROVED"
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);
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my @valid_mozilla_trust_levels = (
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"TRUSTED_DELEGATOR", # CAs
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"NOT_TRUSTED", # Don't trust these certs.
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"MUST_VERIFY_TRUST", # This explicitly tells us that it ISN'T a CA but is otherwise ok. In other words, this should tell the app to ignore any other sources that claim this is a CA.
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"TRUSTED" # This cert is trusted, but only for itself and not for delegates (i.e. it is not a CA).
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);
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my $default_signature_algorithms = $opt_s = "MD5";
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my @valid_signature_algorithms = (
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"MD5",
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"SHA1",
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"SHA256",
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"SHA384",
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"SHA512"
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);
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$0 =~ s@.*(/|\\)@@;
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$Getopt::Std::STANDARD_HELP_VERSION = 1;
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getopts('bd:fhilnp:qs:tuvw:');
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if(!defined($opt_d)) {
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# to make plain "-d" use not cause warnings, and actually still work
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$opt_d = 'release';
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}
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# Use predefined URL or else custom URL specified on command line.
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my $url = ( defined( $urls{$opt_d} ) ) ? $urls{$opt_d} : $opt_d;
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my $curl = `curl -V`;
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if ($opt_i) {
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print ("=" x 78 . "\n");
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print "Script Version : $version\n";
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print "Perl Version : $]\n";
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print "Operating System Name : $^O\n";
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print "Getopt::Std.pm Version : ${Getopt::Std::VERSION}\n";
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print "MIME::Base64.pm Version : ${MIME::Base64::VERSION}\n";
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print "LWP::UserAgent.pm Version : ${LWP::UserAgent::VERSION}\n";
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print "LWP.pm Version : ${LWP::VERSION}\n";
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print "Digest::SHA.pm Version : ${Digest::SHA::VERSION}\n" if ($Digest::SHA::VERSION);
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print "Digest::SHA::PurePerl.pm Version : ${Digest::SHA::PurePerl::VERSION}\n" if ($Digest::SHA::PurePerl::VERSION);
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print ("=" x 78 . "\n");
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}
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sub warning_message() {
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if ( $opt_d =~ m/^risk$/i ) { # Long Form Warning and Exit
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print "Warning: Use of this script may pose some risk:\n";
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print "\n";
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print " 1) Using http is subject to man in the middle attack of certdata content\n";
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print " 2) Default to 'release', but more recent updates may be found in other trees\n";
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print " 3) certdata.txt file format may change, lag time to update this script\n";
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print " 4) Generally unwise to blindly trust CAs without manual review & verification\n";
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print " 5) Mozilla apps use additional security checks aren't represented in certdata\n";
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print " 6) Use of this script will make a security engineer grind his teeth and\n";
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print " swear at you. ;)\n";
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exit;
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} else { # Short Form Warning
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print "Warning: Use of this script may pose some risk, -d risk for more details.\n";
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}
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}
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sub HELP_MESSAGE() {
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print "Usage:\t${0} [-b] [-d<certdata>] [-f] [-i] [-l] [-n] [-p<purposes:levels>] [-q] [-s<algorithms>] [-t] [-u] [-v] [-w<l>] [<outputfile>]\n";
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print "\t-b\tbackup an existing version of ca-bundle.crt\n";
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print "\t-d\tspecify Mozilla tree to pull certdata.txt or custom URL\n";
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print "\t\t Valid names are:\n";
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print "\t\t ", join( ", ", map { ( $_ =~ m/$opt_d/ ) ? "$_ (default)" : "$_" } sort keys %urls ), "\n";
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print "\t-f\tforce rebuild even if certdata.txt is current\n";
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print "\t-i\tprint version info about used modules\n";
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print "\t-l\tprint license info about certdata.txt\n";
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print "\t-n\tno download of certdata.txt (to use existing)\n";
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print wrap("\t","\t\t", "-p\tlist of Mozilla trust purposes and levels for certificates to include in output. Takes the form of a comma separated list of purposes, a colon, and a comma separated list of levels. (default: $default_mozilla_trust_purposes:$default_mozilla_trust_levels)"), "\n";
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print "\t\t Valid purposes are:\n";
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print wrap("\t\t ","\t\t ", join( ", ", "ALL", @valid_mozilla_trust_purposes ) ), "\n";
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print "\t\t Valid levels are:\n";
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print wrap("\t\t ","\t\t ", join( ", ", "ALL", @valid_mozilla_trust_levels ) ), "\n";
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print "\t-q\tbe really quiet (no progress output at all)\n";
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print wrap("\t","\t\t", "-s\tcomma separated list of certificate signatures/hashes to output in plain text mode. (default: $default_signature_algorithms)\n");
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print "\t\t Valid signature algorithms are:\n";
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print wrap("\t\t ","\t\t ", join( ", ", "ALL", @valid_signature_algorithms ) ), "\n";
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print "\t-t\tinclude plain text listing of certificates\n";
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print "\t-u\tunlink (remove) certdata.txt after processing\n";
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print "\t-v\tbe verbose and print out processed CAs\n";
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print "\t-w <l>\twrap base64 output lines after <l> chars (default: ${opt_w})\n";
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exit;
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}
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sub VERSION_MESSAGE() {
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print "${0} version ${version} running Perl ${]} on ${^O}\n";
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}
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warning_message() unless ($opt_q || $url =~ m/^(ht|f)tps:/i );
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HELP_MESSAGE() if ($opt_h);
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sub report($@) {
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my $output = shift;
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print STDERR $output . "\n" unless $opt_q;
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}
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sub is_in_list($@) {
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my $target = shift;
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return defined(List::Util::first { $target eq $_ } @_);
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}
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# Parses $param_string as a case insensitive comma separated list with optional whitespace
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# validates that only allowed parameters are supplied
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sub parse_csv_param($$@) {
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my $description = shift;
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my $param_string = shift;
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my @valid_values = @_;
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my @values = map {
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s/^\s+//; # strip leading spaces
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s/\s+$//; # strip trailing spaces
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uc $_ # return the modified string as upper case
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} split( ',', $param_string );
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# Find all values which are not in the list of valid values or "ALL"
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my @invalid = grep { !is_in_list($_,"ALL",@valid_values) } @values;
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if ( scalar(@invalid) > 0 ) {
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# Tell the user which parameters were invalid and print the standard help message which will exit
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print "Error: Invalid ", $description, scalar(@invalid) == 1 ? ": " : "s: ", join( ", ", map { "\"$_\"" } @invalid ), "\n";
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HELP_MESSAGE();
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}
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@values = @valid_values if ( is_in_list("ALL",@values) );
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return @values;
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}
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sub sha1 {
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my $result;
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if ($Digest::SHA::VERSION || $Digest::SHA::PurePerl::VERSION) {
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open(FILE, $_[0]) or die "Can't open '$_[0]': $!";
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binmode(FILE);
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$result = $MOD_SHA->new(1)->addfile(*FILE)->hexdigest;
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close(FILE);
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} else {
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# Use OpenSSL command if Perl Digest::SHA modules not available
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$result = (split(/ |\r|\n/,`$openssl dgst -sha1 $_[0]`))[1];
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}
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return $result;
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}
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sub oldsha1 {
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my $sha1 = "";
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open(C, "<$_[0]") || return 0;
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while(<C>) {
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chomp;
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if($_ =~ /^\#\# SHA1: (.*)/) {
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$sha1 = $1;
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last;
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}
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}
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close(C);
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return $sha1;
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}
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if ( $opt_p !~ m/:/ ) {
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print "Error: Mozilla trust identifier list must include both purposes and levels\n";
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HELP_MESSAGE();
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}
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(my $included_mozilla_trust_purposes_string, my $included_mozilla_trust_levels_string) = split( ':', $opt_p );
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my @included_mozilla_trust_purposes = parse_csv_param( "trust purpose", $included_mozilla_trust_purposes_string, @valid_mozilla_trust_purposes );
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my @included_mozilla_trust_levels = parse_csv_param( "trust level", $included_mozilla_trust_levels_string, @valid_mozilla_trust_levels );
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my @included_signature_algorithms = parse_csv_param( "signature algorithm", $opt_s, @valid_signature_algorithms );
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sub should_output_cert(%) {
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my %trust_purposes_by_level = @_;
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foreach my $level (@included_mozilla_trust_levels) {
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# for each level we want to output, see if any of our desired purposes are included
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return 1 if ( defined( List::Util::first { is_in_list( $_, @included_mozilla_trust_purposes ) } @{$trust_purposes_by_level{$level}} ) );
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}
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return 0;
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}
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my $crt = $ARGV[0] || 'ca-bundle.crt';
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(my $txt = $url) =~ s@(.*/|\?.*)@@g;
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my $stdout = $crt eq '-';
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my $resp;
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my $fetched;
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my $oldsha1 = oldsha1($crt);
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report "SHA1 of old file: $oldsha1";
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report "Downloading '$txt' ...";
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if($curl && !$opt_n) {
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my $https = $url;
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$https =~ s/^http:/https:/;
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report "Get certdata over HTTPS with curl!";
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my $quiet = $opt_q ? "-s" : "";
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my @out = `curl -w %{response_code} $quiet -O $https`;
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if(@out && $out[0] == 200) {
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$fetched = 1;
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} else {
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report "Failed downloading HTTPS with curl, trying HTTP with LWP";
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}
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}
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unless ($fetched || ($opt_n and -e $txt)) {
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my $ua = new LWP::UserAgent(agent => "$0/$version");
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$ua->env_proxy();
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$resp = $ua->mirror($url, $txt);
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if ($resp && $resp->code eq '304') {
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report "Not modified";
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exit 0 if -e $crt && !$opt_f;
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} else {
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$fetched = 1;
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}
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if( !$resp || $resp->code !~ /^(?:200|304)$/ ) {
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report "Unable to download latest data: "
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. ($resp? $resp->code . ' - ' . $resp->message : "LWP failed");
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exit 1 if -e $crt || ! -r $txt;
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}
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}
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my $filedate = $resp ? $resp->last_modified : (stat($txt))[9];
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my $datesrc = "as of";
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if(!$filedate) {
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# mxr.mozilla.org gave us a time, hg.mozilla.org does not!
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$filedate = time();
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$datesrc="downloaded on";
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}
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# get the hash from the download file
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my $newsha1= sha1($txt);
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if(!$opt_f && $oldsha1 eq $newsha1) {
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report "Downloaded file identical to previous run\'s source file. Exiting";
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exit;
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}
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report "SHA1 of new file: $newsha1";
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my $currentdate = scalar gmtime($filedate);
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my $format = $opt_t ? "plain text and " : "";
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if( $stdout ) {
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open(CRT, '> -') or die "Couldn't open STDOUT: $!\n";
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} else {
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open(CRT,">$crt.~") or die "Couldn't open $crt.~: $!\n";
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}
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print CRT <<EOT;
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##
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## Bundle of CA Root Certificates
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##
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## Certificate data from Mozilla ${datesrc}: ${currentdate}
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##
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## This is a bundle of X.509 certificates of public Certificate Authorities
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## (CA). These were automatically extracted from Mozilla's root certificates
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## file (certdata.txt). This file can be found in the mozilla source tree:
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## ${url}
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##
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## It contains the certificates in ${format}PEM format and therefore
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## can be directly used with curl / libcurl / php_curl, or with
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## an Apache+mod_ssl webserver for SSL client authentication.
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## Just configure this file as the SSLCACertificateFile.
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##
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## Conversion done with mk-ca-bundle.pl version $version.
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## SHA1: $newsha1
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##
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EOT
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report "Processing '$txt' ...";
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my $caname;
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my $certnum = 0;
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my $skipnum = 0;
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my $start_of_cert = 0;
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open(TXT,"$txt") or die "Couldn't open $txt: $!\n";
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while (<TXT>) {
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if (/\*\*\*\*\* BEGIN LICENSE BLOCK \*\*\*\*\*/) {
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print CRT;
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print if ($opt_l);
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while (<TXT>) {
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print CRT;
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print if ($opt_l);
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last if (/\*\*\*\*\* END LICENSE BLOCK \*\*\*\*\*/);
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}
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}
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next if /^#|^\s*$/;
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chomp;
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if (/^CVS_ID\s+\"(.*)\"/) {
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print CRT "# $1\n";
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}
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# this is a match for the start of a certificate
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if (/^CKA_CLASS CK_OBJECT_CLASS CKO_CERTIFICATE/) {
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$start_of_cert = 1
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}
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if ($start_of_cert && /^CKA_LABEL UTF8 \"(.*)\"/) {
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$caname = $1;
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}
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my %trust_purposes_by_level;
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if ($start_of_cert && /^CKA_VALUE MULTILINE_OCTAL/) {
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my $data;
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while (<TXT>) {
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last if (/^END/);
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chomp;
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my @octets = split(/\\/);
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shift @octets;
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for (@octets) {
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$data .= chr(oct);
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}
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}
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# scan forwards until the trust part
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while (<TXT>) {
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last if (/^CKA_CLASS CK_OBJECT_CLASS CKO_NSS_TRUST/);
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chomp;
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}
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# now scan the trust part to determine how we should trust this cert
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while (<TXT>) {
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last if (/^#/);
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if (/^CKA_TRUST_([A-Z_]+)\s+CK_TRUST\s+CKT_NSS_([A-Z_]+)\s*$/) {
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if ( !is_in_list($1,@valid_mozilla_trust_purposes) ) {
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report "Warning: Unrecognized trust purpose for cert: $caname. Trust purpose: $1. Trust Level: $2";
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} elsif ( !is_in_list($2,@valid_mozilla_trust_levels) ) {
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report "Warning: Unrecognized trust level for cert: $caname. Trust purpose: $1. Trust Level: $2";
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} else {
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push @{$trust_purposes_by_level{$2}}, $1;
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}
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}
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}
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if ( !should_output_cert(%trust_purposes_by_level) ) {
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$skipnum ++;
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} else {
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my $encoded = MIME::Base64::encode_base64($data, '');
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$encoded =~ s/(.{1,${opt_w}})/$1\n/g;
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my $pem = "-----BEGIN CERTIFICATE-----\n"
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. $encoded
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. "-----END CERTIFICATE-----\n";
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print CRT "\n$caname\n";
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my $maxStringLength = length($caname);
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if ($opt_t) {
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foreach my $key (keys %trust_purposes_by_level) {
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my $string = $key . ": " . join(", ", @{$trust_purposes_by_level{$key}});
|
|
$maxStringLength = List::Util::max( length($string), $maxStringLength );
|
|
print CRT $string . "\n";
|
|
}
|
|
}
|
|
print CRT ("=" x $maxStringLength . "\n");
|
|
if (!$opt_t) {
|
|
print CRT $pem;
|
|
} else {
|
|
my $pipe = "";
|
|
foreach my $hash (@included_signature_algorithms) {
|
|
$pipe = "|$openssl x509 -" . $hash . " -fingerprint -noout -inform PEM";
|
|
if (!$stdout) {
|
|
$pipe .= " >> $crt.~";
|
|
close(CRT) or die "Couldn't close $crt.~: $!";
|
|
}
|
|
open(TMP, $pipe) or die "Couldn't open openssl pipe: $!";
|
|
print TMP $pem;
|
|
close(TMP) or die "Couldn't close openssl pipe: $!";
|
|
if (!$stdout) {
|
|
open(CRT, ">>$crt.~") or die "Couldn't open $crt.~: $!";
|
|
}
|
|
}
|
|
$pipe = "|$openssl x509 -text -inform PEM";
|
|
if (!$stdout) {
|
|
$pipe .= " >> $crt.~";
|
|
close(CRT) or die "Couldn't close $crt.~: $!";
|
|
}
|
|
open(TMP, $pipe) or die "Couldn't open openssl pipe: $!";
|
|
print TMP $pem;
|
|
close(TMP) or die "Couldn't close openssl pipe: $!";
|
|
if (!$stdout) {
|
|
open(CRT, ">>$crt.~") or die "Couldn't open $crt.~: $!";
|
|
}
|
|
}
|
|
report "Parsing: $caname" if ($opt_v);
|
|
$certnum ++;
|
|
$start_of_cert = 0;
|
|
}
|
|
}
|
|
}
|
|
close(TXT) or die "Couldn't close $txt: $!\n";
|
|
close(CRT) or die "Couldn't close $crt.~: $!\n";
|
|
unless( $stdout ) {
|
|
if ($opt_b && -e $crt) {
|
|
my $bk = 1;
|
|
while (-e "$crt.~${bk}~") {
|
|
$bk++;
|
|
}
|
|
rename $crt, "$crt.~${bk}~" or die "Failed to create backup $crt.~$bk}~: $!\n";
|
|
} elsif( -e $crt ) {
|
|
unlink( $crt ) or die "Failed to remove $crt: $!\n";
|
|
}
|
|
rename "$crt.~", $crt or die "Failed to rename $crt.~ to $crt: $!\n";
|
|
}
|
|
unlink $txt if ($opt_u);
|
|
report "Done ($certnum CA certs processed, $skipnum skipped).";
|