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caroot: update CA bundle processor

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Our current processor was identified as trusting cert not explicitly
marked for SERVER_AUTH, as well as certs that were tagged with
DISTRUST_AFTER.

Update the script to handle both scenarios. This patch was originally
authored by mandree@ for ports, and it was subsequently ported to base
caroot.

MFC after:	3 days
This commit is contained in:
Kyle Evans 2021-03-29 22:05:38 -05:00
parent 446169e0b6
commit c3510c941c
1 changed files with 43 additions and 12 deletions
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55
secure/caroot/MAca-bundle.pl
View file

@ -76,6 +76,8 @@ sub print_header($$)
## Authority (CA). It was automatically extracted from Mozilla's
## root CA list (the file `certdata.txt' in security/nss).
##
## It contains a certificate trusted for server authentication.
##
## Extracted from nss
## with $VERSION
##
@ -91,6 +93,8 @@ EOFH
## Authorities (CA). These were automatically extracted from Mozilla's
## root CA list (the file `certdata.txt').
##
## It contains certificates trusted for server authentication.
##
## Extracted from nss
## with $VERSION
##
@ -100,6 +104,13 @@ EOH
}
}
# returns a string like YYMMDDhhmmssZ of current time in GMT zone
sub timenow()
{
my ($sec,$min,$hour,$mday,$mon,$year,undef,undef,undef) = gmtime(time);
return sprintf "%02d%02d%02d%02d%02d%02dZ", $year-100, $mon+1, $mday, $hour, $min, $sec;
}
sub printcert($$$)
{
my ($fh, $label, $certdata) = @_;
@ -110,6 +121,8 @@ sub printcert($$$)
close(OUT) or die "openssl x509 failed with exit code $?";
}
# converts a datastream that is to be \177-style octal constants
# from <> to a (binary) string and returns it
sub graboct($)
{
my $ifh = shift;
@ -125,13 +138,13 @@ sub graboct($)
return $data;
}
sub grabcert($)
{
my $ifh = shift;
my $certdata;
my $cka_label;
my $serial;
my $cka_label = '';
my $serial = 0;
my $distrust = 0;
while (<$ifh>) {
chomp;
@ -148,6 +161,19 @@ sub grabcert($)
if (/^CKA_SERIAL_NUMBER MULTILINE_OCTAL/) {
$serial = graboct($ifh);
}
if (/^CKA_NSS_SERVER_DISTRUST_AFTER MULTILINE_OCTAL/)
{
my $distrust_after = graboct($ifh);
my $time_now = timenow();
if ($time_now >= $distrust_after) { $distrust = 1; }
if ($debug) {
printf STDERR "line $.: $cka_label ser #%d: distrust after %s, now: %s -> distrust $distrust\n", $serial, $distrust_after, timenow();
}
if ($distrust) {
return undef;
}
}
}
return ($serial, $cka_label, $certdata);
}
@ -171,13 +197,13 @@ sub grabtrust($) {
$serial = graboct($ifh);
}
if (/^CKA_TRUST_(SERVER_AUTH|EMAIL_PROTECTION|CODE_SIGNING) CK_TRUST (\S+)$/)
if (/^CKA_TRUST_SERVER_AUTH CK_TRUST (\S+)$/)
{
if ($2 eq 'CKT_NSS_NOT_TRUSTED') {
if ($1 eq 'CKT_NSS_NOT_TRUSTED') {
$distrust = 1;
} elsif ($2 eq 'CKT_NSS_TRUSTED_DELEGATOR') {
} elsif ($1 eq 'CKT_NSS_TRUSTED_DELEGATOR') {
$maytrust = 1;
} elsif ($2 ne 'CKT_NSS_MUST_VERIFY_TRUST') {
} elsif ($1 ne 'CKT_NSS_MUST_VERIFY_TRUST') {
confess "Unknown trust setting on line $.:\n"
. "$_\n"
. "Script must be updated:";
@ -197,16 +223,22 @@ if (!$outputdir) {
print_header(*STDOUT, "");
}
my $untrusted = 0;
while (<$inputfh>) {
if (/^CKA_CLASS CK_OBJECT_CLASS CKO_CERTIFICATE/) {
my ($serial, $label, $certdata) = grabcert($inputfh);
if (defined $certs{$label."\0".$serial}) {
warn "Certificate $label duplicated!\n";
}
$certs{$label."\0".$serial} = $certdata;
# We store the label in a separate hash because truncating the key
# with \0 was causing garbage data after the end of the text.
$labels{$label."\0".$serial} = $label;
if (defined $certdata) {
$certs{$label."\0".$serial} = $certdata;
# We store the label in a separate hash because truncating the key
# with \0 was causing garbage data after the end of the text.
$labels{$label."\0".$serial} = $label;
} else { # $certdata undefined? distrust_after in effect
$untrusted ++;
}
} elsif (/^CKA_CLASS CK_OBJECT_CLASS CKO_NSS_TRUST/) {
my ($serial, $label, $trust) = grabtrust($inputfh);
if (defined $trusts{$label."\0".$serial}) {
@ -226,7 +258,6 @@ sub label_to_filename(@) {
}
# weed out untrusted certificates
my $untrusted = 0;
foreach my $it (keys %trusts) {
if (!$trusts{$it}) {
if (!exists($certs{$it})) {