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fix #3789: allow disabling TLS v1.2/v1.3

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SSL 2 and 3 are already disabled by default by us, and TLS 1.1 and below
are disabled by default on Debian systems.

requires corresponding patch in pve-manager to have an effect.

Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
Tested-by: Stoiko Ivanov <s.ivanov@proxmox.com>
Reviewed-by: Stoiko Ivanov <s.ivanov@proxmox.com>
This commit is contained in:
Fabian Grünbichler 2021-12-17 13:57:29 +01:00 committed by Thomas Lamprecht
parent d93700f182
commit e902248507
2 changed files with 15 additions and 1 deletions
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5
src/PVE/APIServer/AnyEvent.pm
View File

@ -1908,6 +1908,11 @@ sub new {
if (delete $self->{ssl}->{honor_cipher_order}) {
$tls_ctx_flags |= &Net::SSLeay::OP_CIPHER_SERVER_PREFERENCE;
}
# workaround until anyevent supports disabling TLS 1.3 directly
if (exists($self->{ssl}->{tlsv1_3}) && !$self->{ssl}->{tlsv1_3}) {
$tls_ctx_flags |= &Net::SSLeay::OP_NO_TLSv1_3;
}
$self->{tls_ctx} = AnyEvent::TLS->new(%{$self->{ssl}});
Net::SSLeay::CTX_set_options($self->{tls_ctx}->{ctx}, $tls_ctx_flags);

11
src/PVE/APIServer/Utils.pm
View File

@ -24,11 +24,20 @@ sub read_proxy_config {
$shcmd .= 'echo \"TLS_KEY_FILE:\$TLS_KEY_FILE\";';
$shcmd .= 'echo \"HONOR_CIPHER_ORDER:\$HONOR_CIPHER_ORDER\";';
$shcmd .= 'echo \"COMPRESSION:\$COMPRESSION\";';
$shcmd .= 'echo \"DISABLE_TLS_1_2:\$DISABLE_TLS_1_2\";';
$shcmd .= 'echo \"DISABLE_TLS_1_3:\$DISABLE_TLS_1_3\";';
my $data = -f $conffile ? `bash -c "$shcmd"` : '';
my $res = {};
my $boolean_options = [
'HONOR_CIPHER_ORDER',
'COMPRESSION',
'DISABLE_TLS_1_2',
'DISABLE_TLS_1_3',
];
while ($data =~ s/^(.*)\n//) {
my ($key, $value) = split(/:/, $1, 2);
next if !defined($value) || $value eq '';
@ -56,7 +65,7 @@ sub read_proxy_config {
$res->{$key} = $value;
} elsif ($key eq 'TLS_KEY_FILE') {
$res->{$key} = $value;
} elsif ($key eq 'HONOR_CIPHER_ORDER' || $key eq 'COMPRESSION') {
} elsif (grep { $key eq $_ } @$boolean_options) {
die "unknown value '$value' - use 0 or 1\n" if $value !~ m/^(0|1)$/;
$res->{$key} = $value;
} else {