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#!/usr/bin/perl
# Script to dump weak RSA certs (Exponent 3 or Modulus size < 1024) according to https://bugs.cacert.org/view.php?id=918
# and https://wiki.cacert.org/Arbitrations/a20110312.1
use strict;
use warnings;
use DBI;
my $dbh = DBI->connect('DBI:mysql:database=cacert;host=127.0.0.1', 'cacert', 'FKj54eZQsZIW', { RaiseError => 1 } ) || die "Cannot connect database: $DBI::errstr";
my $sth_certs;
my $sth_userdata;
my $cert_domid;
my $cert_userid;
my $cert_CN;
my $cert_expire;
my $cert_filename;
my $user_email;
my $user_firstname;
my @row;
sub IsWeak($) {
my ($CertFileName) = @_;
my $ModulusSize = 0;
my $Exponent = 0;
my $result = 0;
open(CERTTEXT, '-|', "openssl x509 -in $CertFileName -noout -text") || die "Cannot start openssl";
while (<CERTTEXT>) {
if (/^ +([^ ]+) Public Key:/) {
last if ($1 ne "RSA");
}
if (/^ +Modulus \((\d+) bit\)/) {
$ModulusSize = $1;
}
if (/^ +Exponent: (\d+)/) {
$Exponent = $1;
last;
}
}
close(CERTTEXT);
if ($ModulusSize > 0 && $Exponent > 0) {
if ($ModulusSize < 1024 || $Exponent==3) {
$result = 1;
}
}
}
# Select only certificates expiring in more than two weeks, since two weeks will probably be needed as turnaround time
# Get all domain certificates
$sth_certs = $dbh->prepare(
"SELECT dc.domid, dc.CN, dc.expire, dc.crt_name ".
" FROM domaincerts AS dc ".
" WHERE dc.expire > DATE_ADD(NOW(), INTERVAL 14 DAY)");
$sth_certs->execute();
$sth_userdata = $dbh->prepare(
"SELECT u.email, u.fname ".
" FROM domains AS d, users AS u ".
" WHERE d.memid=u.id AND d.id=?");
while(($cert_domid, $cert_CN, $cert_expire, $cert_filename) = $sth_certs->fetchrow_array) {
if (-f $cert_filename) {
if (IsWeak($cert_filename)) {
$sth_userdata->execute($cert_domid);
($user_email, $user_firstname) = $sth_userdata->fetchrow_array();
print join("\t", ('DomainCert', $user_email, $user_firstname, $cert_expire, $cert_CN)). "\n";
$sth_userdata->finish();
}
}
}
$sth_certs->finish();
# Get all email certificates
$sth_certs = $dbh->prepare(
"SELECT ec.memid, ec.CN, ec.expire, ec.crt_name ".
" FROM emailcerts AS ec ".
" WHERE ec.expire > DATE_ADD(NOW(), INTERVAL 14 DAY)");
$sth_certs->execute();
$sth_userdata = $dbh->prepare(
"SELECT u.email, u.fname ".
" FROM users AS u ".
" WHERE u.id=?");
while(($cert_userid, $cert_CN, $cert_expire, $cert_filename) = $sth_certs->fetchrow_array) {
if (-f $cert_filename) {
if (IsWeak($cert_filename)) {
$sth_userdata->execute($cert_userid);
($user_email, $user_firstname) = $sth_userdata->fetchrow_array();
print join("\t", ('EmailCert', $user_email, $user_firstname, $cert_expire, $cert_CN)). "\n";
$sth_userdata->finish();
}
}
}
$sth_certs->finish();
# Get all Org Server certificates, notify all admins of the Org!
$sth_certs = $dbh->prepare(
"SELECT dc.orgid, dc.CN, dc.expire, dc.crt_name ".
" FROM orgdomaincerts AS dc ".
" WHERE dc.expire > DATE_ADD(NOW(), INTERVAL 14 DAY)");
$sth_certs->execute();
$sth_userdata = $dbh->prepare(
"SELECT u.email, u.fname ".
" FROM users AS u, org ".
" WHERE u.id=org.memid and org.orgid=?");
while(($cert_userid, $cert_CN, $cert_expire, $cert_filename) = $sth_certs->fetchrow_array) {
if (-f $cert_filename) {
if (IsWeak($cert_filename)) {
$sth_userdata->execute($cert_userid);
while(($user_email, $user_firstname) = $sth_userdata->fetchrow_array()) {
print join("\t", ('OrgServerCert', $user_email, $user_firstname, $cert_expire, $cert_CN)). "\n";
}
$sth_userdata->finish();
}
}
}
$sth_certs->finish();
# Get all Org Email certificates, notify all admins of the Org!
$sth_certs = $dbh->prepare(
"SELECT ec.orgid, ec.CN, ec.expire, ec.crt_name ".
" FROM orgemailcerts AS ec ".
" WHERE ec.expire > DATE_ADD(NOW(), INTERVAL 14 DAY)");
$sth_certs->execute();
$sth_userdata = $dbh->prepare(
"SELECT u.email, u.fname ".
" FROM users AS u, org ".
" WHERE u.id=org.memid and org.orgid=?");
while(($cert_userid, $cert_CN, $cert_expire, $cert_filename) = $sth_certs->fetchrow_array) {
if (-f $cert_filename) {
if (IsWeak($cert_filename)) {
$sth_userdata->execute($cert_userid);
while(($user_email, $user_firstname) = $sth_userdata->fetchrow_array()) {
print join("\t", ('OrgEmailCert', $user_email, $user_firstname, $cert_expire, $cert_CN)). "\n";
}
$sth_userdata->finish();
}
}
}
$sth_certs->finish();
$dbh->disconnect();
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