mirror of
https://github.com/zeek/zeek.git
synced 2025-10-02 14:48:21 +00:00
64 lines
2.5 KiB
Text
64 lines
2.5 KiB
Text
##! Generate notices when X.509 certificates over SSL/TLS are expired or
|
|
##! going to expire soon based on the date and time values stored within the
|
|
##! certificate.
|
|
|
|
@load base/protocols/ssl
|
|
@load base/frameworks/notice
|
|
@load base/utils/directions-and-hosts
|
|
|
|
@load protocols/ssl/cert-hash
|
|
|
|
module SSL;
|
|
|
|
export {
|
|
redef enum Notice::Type += {
|
|
## Indicates that a certificate's NotValidAfter date has lapsed
|
|
## and the certificate is now invalid.
|
|
Certificate_Expired,
|
|
## Indicates that a certificate is going to expire within
|
|
## :bro:id:`SSL::notify_when_cert_expiring_in`.
|
|
Certificate_Expires_Soon,
|
|
## Indicates that a certificate's NotValidBefore date is future
|
|
## dated.
|
|
Certificate_Not_Valid_Yet,
|
|
};
|
|
|
|
## The category of hosts you would like to be notified about which have
|
|
## certificates that are going to be expiring soon. By default, these
|
|
## notices will be suppressed by the notice framework for 1 day after
|
|
## a particular certificate has had a notice generated.
|
|
## Choices are: LOCAL_HOSTS, REMOTE_HOSTS, ALL_HOSTS, NO_HOSTS
|
|
const notify_certs_expiration = LOCAL_HOSTS &redef;
|
|
|
|
## The time before a certificate is going to expire that you would like
|
|
## to start receiving :bro:enum:`SSL::Certificate_Expires_Soon` notices.
|
|
const notify_when_cert_expiring_in = 30days &redef;
|
|
}
|
|
|
|
event x509_certificate(c: connection, is_orig: bool, cert: X509, chain_idx: count, chain_len: count, der_cert: string) &priority=3
|
|
{
|
|
# If this isn't the host cert or we aren't interested in the server, just return.
|
|
if ( is_orig ||
|
|
chain_idx != 0 ||
|
|
! c$ssl?$cert_hash ||
|
|
! addr_matches_host(c$id$resp_h, notify_certs_expiration) )
|
|
return;
|
|
|
|
if ( cert$not_valid_before > network_time() )
|
|
NOTICE([$note=Certificate_Not_Valid_Yet,
|
|
$conn=c, $suppress_for=1day,
|
|
$msg=fmt("Certificate %s isn't valid until %T", cert$subject, cert$not_valid_before),
|
|
$identifier=cat(c$id$resp_h, c$id$resp_p, c$ssl$cert_hash)]);
|
|
|
|
else if ( cert$not_valid_after < network_time() )
|
|
NOTICE([$note=Certificate_Expired,
|
|
$conn=c, $suppress_for=1day,
|
|
$msg=fmt("Certificate %s expired at %T", cert$subject, cert$not_valid_after),
|
|
$identifier=cat(c$id$resp_h, c$id$resp_p, c$ssl$cert_hash)]);
|
|
|
|
else if ( cert$not_valid_after - notify_when_cert_expiring_in < network_time() )
|
|
NOTICE([$note=Certificate_Expires_Soon,
|
|
$msg=fmt("Certificate %s is going to expire at %T", cert$subject, cert$not_valid_after),
|
|
$conn=c, $suppress_for=1day,
|
|
$identifier=cat(c$id$resp_h, c$id$resp_p, c$ssl$cert_hash)]);
|
|
}
|