replace python script with perl script

we need ca-certificates when bootstrapping new architectures. Avoid use
of python to reduce number of dependencies when bootstrapping.

So use mk-ca-bundle.pl script from curl, and add a small shell script
that splits the bundle to separate .crt files, similar way that the
python script did.

5 files changed, 642 insertions, 159 deletions

diff --git a/.gitignore b/.gitignore
index 8878f38..6f5e9fe 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,4 @@ update-ca-certificates
 c_rehash
 certdata.stamp
 *.crt
+*.pem
diff --git a/Makefile b/Makefile
index 3eb6672..c688d73 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-PYTHON := python3
+PERL := perl
 
 all: update-ca-certificates c_rehash certdata.stamp
 
@@ -8,8 +8,11 @@ update-ca-certificates: update-ca.c
 c_rehash: c_rehash.c
 	${CC} ${CFLAGS} -o $@ c_rehash.c -lcrypto ${LDFLAGS}
 
-certdata.stamp:
-	${PYTHON} certdata2pem.py
+cert.pem: mk-ca-bundle.pl
+	${PERL} mk-ca-bundle.pl -n -w 64 $@
+
+certdata.stamp: cert.pem split-ca-bundle.sh
+	${SHELL} split-ca-bundle.sh < cert.pem
 	touch $@
 
 install: all
@@ -29,7 +32,7 @@ install: all
 	install -m755 c_rehash ${DESTDIR}/usr/bin
 
 clean:
-	rm -rf update-ca-certificates c_rehash certdata.stamp *.crt
+	rm -rf update-ca-certificates c_rehash certdata.stamp *.crt cert.pem
 
 # https://hg.mozilla.org/mozilla-central/file/tip/security/nss/lib/ckfw/builtins/certdata.txt
 update:
diff --git a/certdata2pem.py b/certdata2pem.py
deleted file mode 100644
index f91422b..0000000
--- a/certdata2pem.py
+++ /dev/null
@@ -1,155 +0,0 @@
-#!/usr/bin/python
-# vim:set et sw=4:
-#
-# certdata2pem.py - splits certdata.txt into multiple files
-#
-# Copyright (C) 2009 Philipp Kern <pkern@debian.org>
-#
-# 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 2 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, write to the Free Software
-# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301,
-# USA.
-
-import base64
-import os.path
-import re
-import sys
-import textwrap
-import io
-
-objects = []
-
-# Dirty file parser.
-in_data, in_multiline, in_obj = False, False, False
-field, type, value, obj = None, None, None, dict()
-
-# Python 3 will not let us decode non-ascii characters if we
-# have not specified an encoding, but Python 2's open does not
-# have an option to set the encoding. Python 3's open is io.open
-# and io.open has been backported to Python 2.6 and 2.7, so use io.open.
-for line in io.open('certdata.txt', 'rt', encoding='utf8'):
-    # Ignore the file header.
-    if not in_data:
-        if line.startswith('BEGINDATA'):
-            in_data = True
-        continue
-    # Ignore comment lines.
-    if line.startswith('#'):
-        continue
-    # Empty lines are significant if we are inside an object.
-    if in_obj and len(line.strip()) == 0:
-        objects.append(obj)
-        obj = dict()
-        in_obj = False
-        continue
-    if len(line.strip()) == 0:
-        continue
-    if in_multiline:
-        if not line.startswith('END'):
-            if type == 'MULTILINE_OCTAL':
-                line = line.strip()
-                for i in re.finditer(r'\\([0-3][0-7][0-7])', line):
-                    value.append(int(i.group(1), 8))
-            else:
-                value += line
-            continue
-        obj[field] = value
-        in_multiline = False
-        continue
-    if line.startswith('CKA_CLASS'):
-        in_obj = True
-    line_parts = line.strip().split(' ', 2)
-    if len(line_parts) > 2:
-        field, type = line_parts[0:2]
-        value = ' '.join(line_parts[2:])
-    elif len(line_parts) == 2:
-        field, type = line_parts
-        value = None
-    else:
-        raise NotImplementedError('line_parts < 2 not supported.')
-    if type == 'MULTILINE_OCTAL':
-        in_multiline = True
-        value = bytearray()
-        continue
-    obj[field] = value
-if len(obj) > 0:
-    objects.append(obj)
-
-# Read blacklist.
-blacklist = []
-if os.path.exists('blacklist.txt'):
-    for line in open('blacklist.txt', 'r'):
-        line = line.strip()
-        if line.startswith('#') or len(line) == 0:
-            continue
-        item = line.split('#', 1)[0].strip()
-        blacklist.append(item)
-
-# Build up trust database.
-trust = dict()
-for obj in objects:
-    if obj['CKA_CLASS'] != 'CKO_NSS_TRUST':
-        continue
-    if obj['CKA_LABEL'] in blacklist:
-        print("Certificate %s blacklisted, ignoring." % obj['CKA_LABEL'])
-    elif obj['CKA_TRUST_SERVER_AUTH'] == 'CKT_NSS_TRUSTED_DELEGATOR':
-        trust[obj['CKA_LABEL']] = True
-    elif obj['CKA_TRUST_EMAIL_PROTECTION'] == 'CKT_NSS_TRUSTED_DELEGATOR':
-        trust[obj['CKA_LABEL']] = True
-    elif obj['CKA_TRUST_SERVER_AUTH'] == 'CKT_NSS_NOT_TRUSTED':
-        print('!'*74)
-        print("UNTRUSTED BUT NOT BLACKLISTED CERTIFICATE FOUND: %s" % obj['CKA_LABEL'])
-        print('!'*74)
-    else:
-        print("Ignoring certificate %s.  SAUTH=%s, EPROT=%s" % \
-              (obj['CKA_LABEL'], obj['CKA_TRUST_SERVER_AUTH'],
-               obj['CKA_TRUST_EMAIL_PROTECTION']))
-
-for obj in objects:
-    if obj['CKA_CLASS'] == 'CKO_CERTIFICATE':
-        if not obj['CKA_LABEL'] in trust or not trust[obj['CKA_LABEL']]:
-            continue
-        bname = obj['CKA_LABEL'][1:-1].replace('/', '_')\
-                                      .replace(' ', '_')\
-                                      .replace('(', '=')\
-                                      .replace(')', '=')\
-                                      .replace(',', '_')
-
-        # this is the only way to decode the way NSS stores multi-byte UTF-8
-        # and we need an escaped string for checking existence of things
-        # otherwise we're dependant on the user's current locale.
-        if bytes != str:
-            # We're in python 3, convert the utf-8 string to a
-            # sequence of bytes that represents this utf-8 string
-            # then encode the byte-sequence as an escaped string that
-            # can be passed to open() and os.path.exists()
-            bname = bname.encode('utf-8').decode('unicode_escape').encode('latin-1')
-        else:
-            # Python 2
-            # Convert the unicode string back to its original byte form
-            # (contents of files returned by io.open are returned as
-            #  unicode strings)
-            # then to an escaped string that can be passed to open()
-            # and os.path.exists()
-            bname = bname.encode('utf-8').decode('string_escape')
-
-        fname = bname + b'.crt'
-        if os.path.exists(fname):
-            print("Found duplicate certificate name %s, renaming." % bname)
-            fname = bname + b'_2.crt'
-        f = open(fname, 'w')
-        f.write("-----BEGIN CERTIFICATE-----\n")
-        encoded = base64.b64encode(obj['CKA_VALUE']).decode('utf-8')
-        f.write("\n".join(textwrap.wrap(encoded, 64)))
-        f.write("\n-----END CERTIFICATE-----\n")
-
diff --git a/mk-ca-bundle.pl b/mk-ca-bundle.pl
new file mode 100644
index 0000000..09e8e5b
--- /dev/null
+++ b/mk-ca-bundle.pl
@@ -0,0 +1,604 @@
+#!/usr/bin/env perl
+# ***************************************************************************
+# *                                  _   _ ____  _
+# *  Project                     ___| | | |  _ \| |
+# *                             / __| | | | |_) | |
+# *                            | (__| |_| |  _ <| |___
+# *                             \___|\___/|_| \_\_____|
+# *
+# * Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al.
+# *
+# * This software is licensed as described in the file COPYING, which
+# * you should have received as part of this distribution. The terms
+# * are also available at https://curl.haxx.se/docs/copyright.html.
+# *
+# * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+# * copies of the Software, and permit persons to whom the Software is
+# * furnished to do so, under the terms of the COPYING file.
+# *
+# * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+# * KIND, either express or implied.
+# *
+# ***************************************************************************
+# This Perl script creates a fresh ca-bundle.crt file for use with libcurl.
+# It downloads certdata.txt from Mozilla's source tree (see URL below),
+# then parses certdata.txt and extracts CA Root Certificates into PEM format.
+# These are then processed with the OpenSSL commandline tool to produce the
+# final ca-bundle.crt file.
+# The script is based on the parse-certs script written by Roland Krikava.
+# This Perl script works on almost any platform since its only external
+# dependency is the OpenSSL commandline tool for optional text listing.
+# Hacked by Guenter Knauf.
+#
+use Encode;
+use Getopt::Std;
+use MIME::Base64;
+use strict;
+use warnings;
+use vars qw($opt_b $opt_d $opt_f $opt_h $opt_i $opt_k $opt_l $opt_m $opt_n $opt_p $opt_q $opt_s $opt_t $opt_u $opt_v $opt_w);
+use List::Util;
+use Text::Wrap;
+use Time::Local;
+my $MOD_SHA = "Digest::SHA";
+eval "require $MOD_SHA";
+if ($@) {
+  $MOD_SHA = "Digest::SHA::PurePerl";
+  eval "require $MOD_SHA";
+}
+eval "require LWP::UserAgent";
+
+my %urls = (
+  'nss' =>
+    'https://hg.mozilla.org/projects/nss/raw-file/default/lib/ckfw/builtins/certdata.txt',
+  'central' =>
+    'https://hg.mozilla.org/mozilla-central/raw-file/default/security/nss/lib/ckfw/builtins/certdata.txt',
+  'beta' =>
+    'https://hg.mozilla.org/releases/mozilla-beta/raw-file/default/security/nss/lib/ckfw/builtins/certdata.txt',
+  'release' =>
+    'https://hg.mozilla.org/releases/mozilla-release/raw-file/default/security/nss/lib/ckfw/builtins/certdata.txt',
+);
+
+$opt_d = 'release';
+
+# If the OpenSSL commandline is not in search path you can configure it here!
+my $openssl = 'openssl';
+
+my $version = '1.27';
+
+$opt_w = 76; # default base64 encoded lines length
+
+# default cert types to include in the output (default is to include CAs which may issue SSL server certs)
+my $default_mozilla_trust_purposes = "SERVER_AUTH";
+my $default_mozilla_trust_levels = "TRUSTED_DELEGATOR";
+$opt_p = $default_mozilla_trust_purposes . ":" . $default_mozilla_trust_levels;
+
+my @valid_mozilla_trust_purposes = (
+  "DIGITAL_SIGNATURE",
+  "NON_REPUDIATION",
+  "KEY_ENCIPHERMENT",
+  "DATA_ENCIPHERMENT",
+  "KEY_AGREEMENT",
+  "KEY_CERT_SIGN",
+  "CRL_SIGN",
+  "SERVER_AUTH",
+  "CLIENT_AUTH",
+  "CODE_SIGNING",
+  "EMAIL_PROTECTION",
+  "IPSEC_END_SYSTEM",
+  "IPSEC_TUNNEL",
+  "IPSEC_USER",
+  "TIME_STAMPING",
+  "STEP_UP_APPROVED"
+);
+
+my @valid_mozilla_trust_levels = (
+  "TRUSTED_DELEGATOR",    # CAs
+  "NOT_TRUSTED",          # Don't trust these certs.
+  "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.
+  "TRUSTED"               # This cert is trusted, but only for itself and not for delegates (i.e. it is not a CA).
+);
+
+my $default_signature_algorithms = $opt_s = "MD5";
+
+my @valid_signature_algorithms = (
+  "MD5",
+  "SHA1",
+  "SHA256",
+  "SHA384",
+  "SHA512"
+);
+
+$0 =~ s@.*(/|\\)@@;
+$Getopt::Std::STANDARD_HELP_VERSION = 1;
+getopts('bd:fhiklmnp:qs:tuvw:');
+
+if(!defined($opt_d)) {
+    # to make plain "-d" use not cause warnings, and actually still work
+    $opt_d = 'release';
+}
+
+# Use predefined URL or else custom URL specified on command line.
+my $url;
+if(defined($urls{$opt_d})) {
+  $url = $urls{$opt_d};
+  if(!$opt_k && $url !~ /^https:\/\//i) {
+    die "The URL for '$opt_d' is not HTTPS. Use -k to override (insecure).\n";
+  }
+}
+else {
+  $url = $opt_d;
+}
+
+my $curl = `curl -V`;
+
+if ($opt_i) {
+  print ("=" x 78 . "\n");
+  print "Script Version                   : $version\n";
+  print "Perl Version                     : $]\n";
+  print "Operating System Name            : $^O\n";
+  print "Getopt::Std.pm Version           : ${Getopt::Std::VERSION}\n";
+  print "Encode::Encoding.pm Version      : ${Encode::Encoding::VERSION}\n";
+  print "MIME::Base64.pm Version          : ${MIME::Base64::VERSION}\n";
+  print "LWP::UserAgent.pm Version        : ${LWP::UserAgent::VERSION}\n" if($LWP::UserAgent::VERSION);
+  print "LWP.pm Version                   : ${LWP::VERSION}\n" if($LWP::VERSION);
+  print "Digest::SHA.pm Version           : ${Digest::SHA::VERSION}\n" if ($Digest::SHA::VERSION);
+  print "Digest::SHA::PurePerl.pm Version : ${Digest::SHA::PurePerl::VERSION}\n" if ($Digest::SHA::PurePerl::VERSION);
+  print ("=" x 78 . "\n");
+}
+
+sub warning_message() {
+  if ( $opt_d =~ m/^risk$/i ) { # Long Form Warning and Exit
+    print "Warning: Use of this script may pose some risk:\n";
+    print "\n";
+    print "  1) If you use HTTP URLs they are subject to a man in the middle attack\n";
+    print "  2) Default to 'release', but more recent updates may be found in other trees\n";
+    print "  3) certdata.txt file format may change, lag time to update this script\n";
+    print "  4) Generally unwise to blindly trust CAs without manual review & verification\n";
+    print "  5) Mozilla apps use additional security checks aren't represented in certdata\n";
+    print "  6) Use of this script will make a security engineer grind his teeth and\n";
+    print "     swear at you.  ;)\n";
+    exit;
+  } else { # Short Form Warning
+    print "Warning: Use of this script may pose some risk, -d risk for more details.\n";
+  }
+}
+
+sub HELP_MESSAGE() {
+  print "Usage:\t${0} [-b] [-d<certdata>] [-f] [-i] [-k] [-l] [-n] [-p<purposes:levels>] [-q] [-s<algorithms>] [-t] [-u] [-v] [-w<l>] [<outputfile>]\n";
+  print "\t-b\tbackup an existing version of ca-bundle.crt\n";
+  print "\t-d\tspecify Mozilla tree to pull certdata.txt or custom URL\n";
+  print "\t\t  Valid names are:\n";
+  print "\t\t    ", join( ", ", map { ( $_ =~ m/$opt_d/ ) ? "$_ (default)" : "$_" } sort keys %urls ), "\n";
+  print "\t-f\tforce rebuild even if certdata.txt is current\n";
+  print "\t-i\tprint version info about used modules\n";
+  print "\t-k\tallow URLs other than HTTPS, enable HTTP fallback (insecure)\n";
+  print "\t-l\tprint license info about certdata.txt\n";
+  print "\t-m\tinclude meta data in output\n";
+  print "\t-n\tno download of certdata.txt (to use existing)\n";
+  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";
+  print "\t\t  Valid purposes are:\n";
+  print wrap("\t\t    ","\t\t    ", join( ", ", "ALL", @valid_mozilla_trust_purposes ) ), "\n";
+  print "\t\t  Valid levels are:\n";
+  print wrap("\t\t    ","\t\t    ", join( ", ", "ALL", @valid_mozilla_trust_levels ) ), "\n";
+  print "\t-q\tbe really quiet (no progress output at all)\n";
+  print wrap("\t","\t\t", "-s\tcomma separated list of certificate signatures/hashes to output in plain text mode. (default: $default_signature_algorithms)\n");
+  print "\t\t  Valid signature algorithms are:\n";
+  print wrap("\t\t    ","\t\t    ", join( ", ", "ALL", @valid_signature_algorithms ) ), "\n";
+  print "\t-t\tinclude plain text listing of certificates\n";
+  print "\t-u\tunlink (remove) certdata.txt after processing\n";
+  print "\t-v\tbe verbose and print out processed CAs\n";
+  print "\t-w <l>\twrap base64 output lines after <l> chars (default: ${opt_w})\n";
+  exit;
+}
+
+sub VERSION_MESSAGE() {
+  print "${0} version ${version} running Perl ${]} on ${^O}\n";
+}
+
+warning_message() unless ($opt_q || $url =~ m/^(ht|f)tps:/i );
+HELP_MESSAGE() if ($opt_h);
+
+sub report($@) {
+  my $output = shift;
+
+  print STDERR $output . "\n" unless $opt_q;
+}
+
+sub is_in_list($@) {
+  my $target = shift;
+
+  return defined(List::Util::first { $target eq $_ } @_);
+}
+
+# Parses $param_string as a case insensitive comma separated list with optional whitespace
+# validates that only allowed parameters are supplied
+sub parse_csv_param($$@) {
+  my $description = shift;
+  my $param_string = shift;
+  my @valid_values = @_;
+
+  my @values = map {
+    s/^\s+//;  # strip leading spaces
+    s/\s+$//;  # strip trailing spaces
+    uc $_      # return the modified string as upper case
+  } split( ',', $param_string );
+
+  # Find all values which are not in the list of valid values or "ALL"
+  my @invalid = grep { !is_in_list($_,"ALL",@valid_values) } @values;
+
+  if ( scalar(@invalid) > 0 ) {
+    # Tell the user which parameters were invalid and print the standard help message which will exit
+    print "Error: Invalid ", $description, scalar(@invalid) == 1 ? ": " : "s: ", join( ", ", map { "\"$_\"" } @invalid ), "\n";
+    HELP_MESSAGE();
+  }
+
+  @values = @valid_values if ( is_in_list("ALL",@values) );
+
+  return @values;
+}
+
+sub sha256 {
+  my $result;
+  if ($Digest::SHA::VERSION || $Digest::SHA::PurePerl::VERSION) {
+    open(FILE, $_[0]) or die "Can't open '$_[0]': $!";
+    binmode(FILE);
+    $result = $MOD_SHA->new(256)->addfile(*FILE)->hexdigest;
+    close(FILE);
+  } else {
+    # Use OpenSSL command if Perl Digest::SHA modules not available
+    $result = `"$openssl" dgst -r -sha256 "$_[0]"`;
+    $result =~ s/^([0-9a-f]{64}) .+/$1/is;
+  }
+  return $result;
+}
+
+
+sub oldhash {
+  my $hash = "";
+  open(C, "<$_[0]") || return 0;
+  while(<C>) {
+    chomp;
+    if($_ =~ /^\#\# SHA256: (.*)/) {
+      $hash = $1;
+      last;
+    }
+  }
+  close(C);
+  return $hash;
+}
+
+if ( $opt_p !~ m/:/ ) {
+  print "Error: Mozilla trust identifier list must include both purposes and levels\n";
+  HELP_MESSAGE();
+}
+
+(my $included_mozilla_trust_purposes_string, my $included_mozilla_trust_levels_string) = split( ':', $opt_p );
+my @included_mozilla_trust_purposes = parse_csv_param( "trust purpose", $included_mozilla_trust_purposes_string, @valid_mozilla_trust_purposes );
+my @included_mozilla_trust_levels = parse_csv_param( "trust level", $included_mozilla_trust_levels_string, @valid_mozilla_trust_levels );
+
+my @included_signature_algorithms = parse_csv_param( "signature algorithm", $opt_s, @valid_signature_algorithms );
+
+sub should_output_cert(%) {
+  my %trust_purposes_by_level = @_;
+
+  foreach my $level (@included_mozilla_trust_levels) {
+    # for each level we want to output, see if any of our desired purposes are included
+    return 1 if ( defined( List::Util::first { is_in_list( $_, @included_mozilla_trust_purposes ) } @{$trust_purposes_by_level{$level}} ) );
+  }
+
+  return 0;
+}
+
+my $crt = $ARGV[0] || 'ca-bundle.crt';
+(my $txt = $url) =~ s@(.*/|\?.*)@@g;
+
+my $stdout = $crt eq '-';
+my $resp;
+my $fetched;
+
+my $oldhash = oldhash($crt);
+
+report "SHA256 of old file: $oldhash";
+
+if(!$opt_n) {
+  report "Downloading $txt ...";
+
+  # If we have an HTTPS URL then use curl
+  if($url =~ /^https:\/\//i) {
+    if($curl) {
+      if($curl =~ /^Protocols:.* https( |$)/m) {
+        report "Get certdata with curl!";
+        my $proto = !$opt_k ? "--proto =https" : "";
+        my $quiet = $opt_q ? "-s" : "";
+        my @out = `curl -w %{response_code} $proto $quiet -o "$txt" "$url"`;
+        if(!$? && @out && $out[0] == 200) {
+          $fetched = 1;
+          report "Downloaded $txt";
+        }
+        else {
+          report "Failed downloading via HTTPS with curl";
+          if(-e $txt && !unlink($txt)) {
+            report "Failed to remove '$txt': $!";
+          }
+        }
+      }
+      else {
+        report "curl lacks https support";
+      }
+    }
+    else {
+      report "curl not found";
+    }
+  }
+
+  # If nothing was fetched then use LWP
+  if(!$fetched) {
+    if($url =~ /^https:\/\//i) {
+      report "Falling back to HTTP";
+      $url =~ s/^https:\/\//http:\/\//i;
+    }
+    if(!$opt_k) {
+      report "URLs other than HTTPS are disabled by default, to enable use -k";
+      exit 1;
+    }
+    report "Get certdata with LWP!";
+    if(!defined(${LWP::UserAgent::VERSION})) {
+      report "LWP is not available (LWP::UserAgent not found)";
+      exit 1;
+    }
+    my $ua  = new LWP::UserAgent(agent => "$0/$version");
+    $ua->env_proxy();
+    $resp = $ua->mirror($url, $txt);
+    if($resp && $resp->code eq '304') {
+      report "Not modified";
+      exit 0 if -e $crt && !$opt_f;
+    }
+    else {
+      $fetched = 1;
+      report "Downloaded $txt";
+    }
+    if(!$resp || $resp->code !~ /^(?:200|304)$/) {
+      report "Unable to download latest data: "
+        . ($resp? $resp->code . ' - ' . $resp->message : "LWP failed");
+      exit 1 if -e $crt || ! -r $txt;
+    }
+  }
+}
+
+my $filedate = $resp ? $resp->last_modified : (stat($txt))[9];
+my $datesrc = "as of";
+if(!$filedate) {
+    # mxr.mozilla.org gave us a time, hg.mozilla.org does not!
+    $filedate = time();
+    $datesrc="downloaded on";
+}
+
+# get the hash from the download file
+my $newhash= sha256($txt);
+
+if(!$opt_f && $oldhash eq $newhash) {
+    report "Downloaded file identical to previous run\'s source file. Exiting";
+    if($opt_u && -e $txt && !unlink($txt)) {
+        report "Failed to remove $txt: $!\n";
+    }
+    exit;
+}
+
+report "SHA256 of new file: $newhash";
+
+my $currentdate = scalar gmtime($filedate);
+
+my $format = $opt_t ? "plain text and " : "";
+if( $stdout ) {
+    open(CRT, '> -') or die "Couldn't open STDOUT: $!\n";
+} else {
+    open(CRT,">$crt.~") or die "Couldn't open $crt.~: $!\n";
+}
+print CRT <<EOT;
+##
+## Bundle of CA Root Certificates
+##
+## Certificate data from Mozilla ${datesrc}: ${currentdate} GMT
+##
+## This is a bundle of X.509 certificates of public Certificate Authorities
+## (CA). These were automatically extracted from Mozilla's root certificates
+## file (certdata.txt).  This file can be found in the mozilla source tree:
+## ${url}
+##
+## It contains the certificates in ${format}PEM format and therefore
+## can be directly used with curl / libcurl / php_curl, or with
+## an Apache+mod_ssl webserver for SSL client authentication.
+## Just configure this file as the SSLCACertificateFile.
+##
+## Conversion done with mk-ca-bundle.pl version $version.
+## SHA256: $newhash
+##
+
+EOT
+
+report "Processing  '$txt' ...";
+my $caname;
+my $certnum = 0;
+my $skipnum = 0;
+my $start_of_cert = 0;
+my @precert;
+my $cka_value;
+my $valid = 1;
+
+open(TXT,"$txt") or die "Couldn't open $txt: $!\n";
+while (<TXT>) {
+  if (/\*\*\*\*\* BEGIN LICENSE BLOCK \*\*\*\*\*/) {
+    print CRT;
+    print if ($opt_l);
+    while (<TXT>) {
+      print CRT;
+      print if ($opt_l);
+      last if (/\*\*\*\*\* END LICENSE BLOCK \*\*\*\*\*/);
+    }
+  }
+  elsif(/^# (Issuer|Serial Number|Subject|Not Valid Before|Not Valid After |Fingerprint \(MD5\)|Fingerprint \(SHA1\)):/) {
+      push @precert, $_;
+      $valid = 1;
+      next;
+  }
+  elsif(/^#|^\s*$/) {
+      undef @precert;
+      next;
+  }
+  chomp;
+
+  # Example:
+  # CKA_NSS_SERVER_DISTRUST_AFTER MULTILINE_OCTAL
+  # \062\060\060\066\061\067\060\060\060\060\060\060\132
+  # END
+
+  if (/^CKA_NSS_SERVER_DISTRUST_AFTER (CK_BBOOL CK_FALSE|MULTILINE_OCTAL)/) {
+      if($1 eq "MULTILINE_OCTAL") {
+          my @timestamp;
+          while (<TXT>) {
+              last if (/^END/);
+              chomp;
+              my @octets = split(/\\/);
+              shift @octets;
+              for (@octets) {
+                  push @timestamp, chr(oct);
+              }
+          }
+          # A trailing Z in the timestamp signifies UTC
+          if($timestamp[12] ne "Z") {
+              report "distrust date stamp is not using UTC";
+          }
+          # Example date: 200617000000Z
+          # Means 2020-06-17 00:00:00 UTC
+          my $distrustat =
+            timegm($timestamp[10] . $timestamp[11], # second
+                   $timestamp[8] . $timestamp[9],   # minute
+                   $timestamp[6] . $timestamp[7],   # hour
+                   $timestamp[4] . $timestamp[5],   # day
+                   ($timestamp[2] . $timestamp[3]) - 1, # month
+                   "20" . $timestamp[0] . $timestamp[1]); # year
+          if(time >= $distrustat) {
+              # not trusted anymore
+              $skipnum++;
+              report "Skipping: $caname is not trusted anymore" if ($opt_v);
+              $valid = 0;
+          }
+          else {
+              # still trusted
+          }
+      }
+      next;
+  }
+
+  # this is a match for the start of a certificate
+  if (/^CKA_CLASS CK_OBJECT_CLASS CKO_CERTIFICATE/) {
+    $start_of_cert = 1
+  }
+  if ($start_of_cert && /^CKA_LABEL UTF8 \"(.*)\"/) {
+    $caname = $1;
+  }
+  my %trust_purposes_by_level;
+  if ($start_of_cert && /^CKA_VALUE MULTILINE_OCTAL/) {
+    $cka_value="";
+    while (<TXT>) {
+      last if (/^END/);
+      chomp;
+      my @octets = split(/\\/);
+      shift @octets;
+      for (@octets) {
+        $cka_value .= chr(oct);
+      }
+    }
+  }
+  if(/^CKA_CLASS CK_OBJECT_CLASS CKO_NSS_TRUST/ && $valid) {
+    # now scan the trust part to determine how we should trust this cert
+    while (<TXT>) {
+      last if (/^#/);
+      if (/^CKA_TRUST_([A-Z_]+)\s+CK_TRUST\s+CKT_NSS_([A-Z_]+)\s*$/) {
+        if ( !is_in_list($1,@valid_mozilla_trust_purposes) ) {
+          report "Warning: Unrecognized trust purpose for cert: $caname. Trust purpose: $1. Trust Level: $2";
+        } elsif ( !is_in_list($2,@valid_mozilla_trust_levels) ) {
+          report "Warning: Unrecognized trust level for cert: $caname. Trust purpose: $1. Trust Level: $2";
+        } else {
+          push @{$trust_purposes_by_level{$2}}, $1;
+        }
+      }
+    }
+
+    if ( !should_output_cert(%trust_purposes_by_level) ) {
+      $skipnum ++;
+      report "Skipping: $caname" if ($opt_v);
+    } else {
+      my $data = $cka_value;
+      $cka_value = "";
+      my $encoded = MIME::Base64::encode_base64($data, '');
+      $encoded =~ s/(.{1,${opt_w}})/$1\n/g;
+      my $pem = "-----BEGIN CERTIFICATE-----\n"
+              . $encoded
+              . "-----END CERTIFICATE-----\n";
+      print CRT "\n$caname\n";
+      print CRT @precert if($opt_m);
+      my $maxStringLength = length(decode('UTF-8', $caname, Encode::FB_CROAK | Encode::LEAVE_SRC));
+      if ($opt_t) {
+        foreach my $key (keys %trust_purposes_by_level) {
+           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;
+    }
+    undef @precert;
+  }
+
+}
+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: $!\n";
+}
+if($opt_u && -e $txt && !unlink($txt)) {
+  report "Failed to remove $txt: $!\n";
+}
+report "Done ($certnum CA certs processed, $skipnum skipped).";
diff --git a/split-ca-bundle.sh b/split-ca-bundle.sh
new file mode 100644
index 0000000..d0f39a8
--- /dev/null
+++ b/split-ca-bundle.sh
@@ -0,0 +1,30 @@
+#!/bin/sh
+
+mkcert() {
+	local name="$1"
+	local line
+	rm -f "$name"
+	while read line; do
+		printf "%s\n" "$line" >> "$name"
+		if [ "$line" = "-----END CERTIFICATE-----" ]; then
+			break;
+		fi
+	done
+}
+
+prev=
+while read line; do
+	case "$line" in
+	=*=)
+		fname="$(printf "%s" "$prev" | tr '/ (),' '__==_').crt"
+		while read cline; do
+			printf "%s\n" "$cline"
+			if [ "$cline" = "-----END CERTIFICATE-----" ]; then
+				break;
+			fi
+		done > "$fname"
+		;;
+	esac
+	prev="$line"
+done
+