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revoke_or_add_an_ip.bro
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revoke_or_add_an_ip.bro
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@load base/protocols/krb/
@load base/files/x509/
@load base/protocols/conn/
@load base/protocols/ssl/main.bro
const broker_port: port = 9999/tcp &redef;
redef exit_only_after_terminate = T;
redef Broker::endpoint_name = "manualremover";
global msg_count = 0;
global h: opaque of Broker::Handle;
global a: string;
global waitforme: bool=F;
global my_event: event(msg: string, c: count);
global centraladdremote: event(ip: addr, reasonin: string, expire: time);
global centralremoveremote: event(ip: addr, reasonin: string, expire: time);
type mytest: record{
a: string &default = "doll";
b: string &default= "T";
};
type com: record{
status: string &default = "U";
status_code: int &optional;
not_valid_before: time &optional;
not_valid_after: time &optional;
key_length: int &optional;
serial: string &optional;
sig_alg: string &optional;
issuer: string &optional;
seen: time &optional;
};
type lbl: record{
ip_src: addr &default= to_addr("0.0.0.0");
ip_krb: addr &default= to_addr("0.0.0.0");
status: string &default = "U";
reason: string &optional;
status_expires: time &optional;
uid: string &optional;
as_req: com &default = com($status="U");
as_res: com &default = com($status="U");
tgt_req: com &default = com($status="U");
tgt_res: com &default = com($status="U");
};
type myrecordset: set[mytest];
global lbltable: table[addr] of lbl;
#global lblvar: lbltable; #([["1"]] =$status="W",[["2"]]=$status="x");
global my_event2: event(msg: mytest);
global my_event3: event(msg: myrecordset);
global my_event4: event(msg: lbl);
global centralautoadd: event(msg: lbl);
global mytable: table[string] of mytest;
event new_connection(c: connection ){
#print c$id$resp_p;
}
event connection_first_ACK(c: connection){
#event connection_established(c: connection ){ #when syn and ack packet recieved in a TCP connection
local anyerror=0;
local srcerror="OK";
local dsterror="OK";
if(c$id$resp_p==102/tcp){
print "a new connection on port 102 has been established \n";
print c;
if (c$id$orig_h in lbltable){
if(lbltable[(c$id$orig_h)]$status!= "OK"){
# if(lbltable[(c$id$orig_h)]$status_expires>c$start_time){
# print "Keberos ID of source expired before connection began.";
# anyerror=1;
#
# }
# else {
# print "source ok";
# }
}
else {
print "source has no valid key";
anyerror=1;
}
}
else {
print "source",c$id$orig_h,"did never contact KRB";
anyerror=1;
}
if (c$id$resp_h in lbltable){
if(lbltable[(c$id$resp_h)]$status!= "OK"){
# if(lbltable[(c$id$resp_h)]$status_expires>c$start_time){
# print "Keberos ID of destination expired before connection began.";
# anyerror=1;
#
# }
# else {
# print "desination ok";
# }
}
else {
print "destination has no valid key";
anyerror=1;
}
}
else{
print "destination", c$id$resp_h,"did never contact KRB sucessfully";
anyerror=1;
}
if (anyerror==1){
print "we have found an error";
#todo send out to rabbit
}
else {
print "new connection on port 102 fully ok!!!!!";
}
}
}
function do_lookup(key: string)
{
# when ( local res = Broker::lookup(h, Broker::data(key)) )
# {
# print "lookup",key,res, Broker::refine_to_string(res$result);
# a= Broker::refine_to_string(res$result);
# return;
# }
# timeout 10000sec
# { print "timeout", key; }
}
event krb_error(c: connection, msg: KRB::Error_Msg) &priority=5{
# print " ";
print "KRB_ERROR";
print msg;
if (lbltable[(c$id$orig_h)]$uid!=c$uid){
print "connection uid dont match";
return;
}
if (lbltable[(c$id$orig_h)]?$as_res){
lbltable[(c$id$orig_h)]$as_res$status_code=msg$error_code;
lbltable[(c$id$orig_h)]$as_res$status=KRB::error_msg[msg$error_code];
lbltable[(c$id$orig_h)]$as_res$seen=network_time();
lbltable[(c$id$orig_h)]$status= "FAILED";
if (!lbltable[(c$id$orig_h)]?$reason){
lbltable[(c$id$orig_h)]$reason=KRB::error_msg[msg$error_code];
}
}
# print "next is the connection info";
# print c;
}
event x509_certificate(f: fa_file, cert_ref: opaque of x509, cert: X509::Certificate){
#We get this if the test was successful
#print " ";
#print "x509 certificate sucessfull";
#print cert;
#print "";
#print "cert ref";
#print cert_ref;
}
event x509_ext_basic_constraints(f: fa_file, ext: X509::BasicConstraints){
#print "x509 test";
}
event centraladd(ip: addr, reasonin: string, expire: time){
#if (ip in lbltable[(ip)]){
# print "already saw user";
#}
#else{
print "Manually added the following ip";
print ip;
lbltable[(ip)] = lbl($ip_src=(ip));
#}
lbltable[(ip)]$as_res$status_code= 0;
lbltable[(ip)]$as_res$status= "ok";
lbltable[(ip)]$as_req$status_code= 0;
lbltable[(ip)]$as_req$status= "ok";
lbltable[(ip)]$tgt_res$status_code= 0;
lbltable[(ip)]$tgt_res$status= "ok";
lbltable[(ip)]$tgt_req$status_code= 0;
lbltable[(ip)]$tgt_req$status= "ok";
lbltable[(ip)]$tgt_req$status_code= 0;
lbltable[(ip)]$status= "ok";
lbltable[(ip)]$reason= reasonin;
lbltable[(ip)]$status_expires= expire;
}
event krb_as_request(c: connection, msg: KRB::KDC_Request) &priority=-20
{
# print " ";
print "got as req_marked";
# if (c$id$orig_h in lbltable[(c$id$orig_h)]){
# print "already saw user";
# }
# else{
lbltable[(c$id$orig_h)] = lbl($ip_src=(c$id$orig_h));
# }
local info: KRB::Info;
if ( c?$krb && c$krb$logged )
return;
if ( !c?$krb )
{
info$ts = network_time();
info$uid = c$uid;
info$id = c$id;
}
else
info = c$krb;
info$request_type = "AS";
info$client = fmt("%s/%s", msg$client_name, msg$service_realm);
info$service = msg$service_name;
if ( msg?$from )
info$from = msg$from;
info$till = msg$till;
info$forwardable = msg$kdc_options$forwardable;
info$renewable = msg$kdc_options$renewable;
lbltable[(c$id$orig_h)]$ip_krb=c$id$resp_h;
lbltable[(c$id$orig_h)]$as_req$status="reqested";
lbltable[(c$id$orig_h)]$as_req$seen=network_time();
lbltable[(c$id$orig_h)]$uid=c$uid;
# print "INFO";
# print info;
if (info?$client_cert){
if(info$client_cert?$x509){
lbltable[(c$id$orig_h)]$as_req$not_valid_before=info$client_cert$x509$certificate$not_valid_before;
lbltable[(c$id$orig_h)]$as_req$not_valid_after=info$client_cert$x509$certificate$not_valid_after;
lbltable[(c$id$orig_h)]$as_req$key_length=info$client_cert$x509$certificate$key_length;
lbltable[(c$id$orig_h)]$as_req$serial=info$client_cert$x509$certificate$serial;
lbltable[(c$id$orig_h)]$as_req$sig_alg=info$client_cert$x509$certificate$sig_alg;
lbltable[(c$id$orig_h)]$as_req$issuer=info$client_cert$x509$certificate$subject;
lbltable[(c$id$orig_h)]$as_req$status="ok";
}
}
else{
lbltable[(c$id$orig_h)]$as_req$status="CERT FAILED";
lbltable[(c$id$orig_h)]$status="FAILED";
lbltable[(c$id$orig_h)]$reason="as-req cert FAILED";
}
#print lbltable;
Broker::send_event("bro/events/my_central", Broker::event_args(centralautoadd,lbltable[(c$id$orig_h)]));
#print info;
#print "connection";
#print c;
}
event krb_tgs_request(c: connection, msg: KRB::KDC_Request) &priority=5
{
#print " ";
print "got KRB TGS request";
if ( c?$krb && c$krb$logged )
return;
local info: KRB::Info;
info$ts = network_time();
info$uid = c$uid;
info$id = c$id;
info$request_type = "TGS";
info$service = msg$service_name;
if ( msg?$from ) info$from = msg$from;
info$till = msg$till;
info$forwardable = msg$kdc_options$forwardable;
info$renewable = msg$kdc_options$renewable;
lbltable[(c$id$orig_h)]$status="tgsrequest";
lbltable[(c$id$orig_h)]$tgt_req$seen=network_time();
lbltable[(c$id$orig_h)]$tgt_req$status="ok";
lbltable[(c$id$orig_h)]$tgt_req$status_code=0;
Broker::send_event("bro/events/my_central", Broker::event_args(centralautoadd,lbltable[(c$id$orig_h)]));
print "TGS req processed";
#print info;
}
event krb_as_response(c: connection, msg: KRB::KDC_Response) &priority=5
{
print "";
print "got KRB as response";
local info: KRB::Info;
if ( c?$krb && c$krb$logged )
return;
if ( c?$krb )
info = c$krb;
if ( ! info?$ts )
{
info$ts = network_time();
info$uid = c$uid;
info$id = c$id;
}
if ( ! info?$client )
info$client = fmt("%s/%s", msg$client_name, msg$client_realm);
info$service = msg$ticket$service_name;
info$cipher = KRB::cipher_name[msg$ticket$cipher];
info$success = T;
if (lbltable[(c$id$orig_h)]$uid!=c$uid){
print "connection uid dont match is as response";
return;
}
lbltable[(c$id$orig_h)]$as_res$status="response";
lbltable[(c$id$orig_h)]$as_res$seen=network_time();
if (info$success == T){
if (info?$server_cert){
if(info$server_cert?$x509){
lbltable[(c$id$orig_h)]$as_res$not_valid_before=info$server_cert$x509$certificate$not_valid_before;
lbltable[(c$id$orig_h)]$as_res$not_valid_after=info$server_cert$x509$certificate$not_valid_after;
lbltable[(c$id$orig_h)]$as_res$key_length=info$server_cert$x509$certificate$key_length;
lbltable[(c$id$orig_h)]$as_res$serial=info$server_cert$x509$certificate$serial;
lbltable[(c$id$orig_h)]$as_res$sig_alg=info$server_cert$x509$certificate$sig_alg;
lbltable[(c$id$orig_h)]$as_res$issuer=info$server_cert$x509$certificate$subject;
lbltable[(c$id$orig_h)]$as_res$status="ok";
lbltable[(c$id$orig_h)]$as_res$not_valid_before=info$server_cert$x509$certificate$not_valid_before;
}
}
else{
# lbltable[(c$id$orig_h)]$as_res$status="CERT FAILED";
# lbltable[(c$id$orig_h)]$status="FAILED";
# lbltable[(c$id$orig_h)]$reason="as-res cert FAILED";
lbltable[(c$id$orig_h)]$as_res$status="ok";
lbltable[(c$id$orig_h)]$status="ok";
lbltable[(c$id$orig_h)]$reason="no server cert in stream but successfull";
}
}
else{
#no success
lbltable[(c$id$orig_h)]$as_res$status="No success FAILED";
lbltable[(c$id$orig_h)]$status="FAILED";
lbltable[(c$id$orig_h)]$reason="as-res no success FAILED";
}
# Broker::send_print("bro/events/test", "AS result true");
# Broker::send_print("bro/events/test", "AS response OK from hostname " +addr_to_ptr_name(c$id$orig_h));
#print info;
#print "";
#print "now the connection info";
#print c;
Broker::send_event("bro/events/my_central", Broker::event_args(centralautoadd,lbltable[(c$id$orig_h)]));
}
event krb_tgs_response(c: connection, msg: KRB::KDC_Response) &priority=5
{
# print "";
print "got krb tgs response";
local info: KRB::Info;
if ( c?$krb && c$krb$logged )
return;
if ( c?$krb )
info = c$krb;
if ( ! info?$ts )
{
info$ts = network_time();
info$uid = c$uid;
info$id = c$id;
}
if ( ! info?$client )
info$client = fmt("%s/%s", msg$client_name, msg$client_realm);
info$service = msg$ticket$service_name;
info$cipher = KRB::cipher_name[msg$ticket$cipher];
info$success = T;
# print "INFO";
# print info;
# print "INFO DONE";
# if (lbltable[(c$id$orig_h)]$uid!=c$uid){
# print "connection uid dont match in tgs response"; #this is normal as TGT is a seperate connection
# return;
#}
lbltable[(c$id$orig_h)]$status="tgsresponse";
lbltable[(c$id$orig_h)]$tgt_res$seen=network_time();
lbltable[(c$id$orig_h)]$tgt_res$status="ok";
lbltable[(c$id$orig_h)]$tgt_res$status_code=0;
lbltable[(c$id$orig_h)]$status="ok";
lbltable[(c$id$orig_h)]$reason="TGT_granted";
if (!lbltable[(c$id$orig_h)]$as_req?$not_valid_after){
lbltable[(c$id$orig_h)]$status_expires=lbltable[(c$id$orig_h)]$as_req$not_valid_after;
}
else{
}
# if (info?$server_cert){
# if(info$server_cert?$x509){
# lbltable[(c$id$orig_h)]$tgt_res$not_valid_before=info$server_cert$x509$certificate$not_valid_before;
# lbltable[(c$id$orig_h)]$tgt_res$key_length=info$server_cert$x509$certificate$key_length;
# lbltable[(c$id$orig_h)]$tgt_res$serial=info$server_cert$x509$certificate$serial;
# lbltable[(c$id$orig_h)]$tgt_res$sig_alg=info$server_cert$x509$certificate$sig_alg;
# lbltable[(c$id$orig_h)]$tgt_res$issuer=info$server_cert$x509$certificate$subject;
# lbltable[(c$id$orig_h)]$tgt_res$status="ok";
# }
# }
# else{
# lbltable[(c$id$orig_h)]$tgt_res$status="CERT FAILED";
# lbltable[(c$id$orig_h)]$status="FAILED";
# lbltable[(c$id$orig_h)]$reason="tgt-res cert FAILED";
#
# }
# lbltable[(c$id$orig_h)]$tgt_res$not_valid_before=info$server_cert$x509$certificate$not_valid_before;
Broker::send_event("bro/events/my_central", Broker::event_args(centralautoadd,lbltable[(c$id$orig_h)]));
print "tgs resp sucessful processed";
# print info;
# print "PRINT COMPLETE";
}
event bro_init(){
print "startup";
print "enableing broker";
Broker::enable();
Broker::subscribe_to_prints("bro/print/");
#Broker::listen(broker_port, "127.0.0.1"); #uncomment this to make bro the server
Broker::connect("127.0.0.1", broker_port, 1sec);
h = Broker::create_master("central");
Broker::insert(h, Broker::data("1"), Broker::data(123));
local myset: set[string] = {"a", "b", "c"};
local myvec: vector of string = {"alpha", "beta", "gamma"};
local myrecord2 = myrecordset([$b="1"],[$b="2"]);
add myrecord2[mytest ($b="t")];
#local myvec2: vector of field = {field: string: "a", field: string: "b"};
Broker::insert(h, Broker::data("myset"), Broker::data(myset));
#Broker::insert(h, Broker::data("myvec"), Broker::data(myvec));
local myrecord: mytest = record($a="12");
Broker::insert(h, Broker::data("myvec"), Broker::data(myvec));
Broker::insert(h, Broker::data("fun"),Broker::data(myrecord2));
#mytable["1"] = mytest($b="1");
#print mytable;
#lbltable[to_addr("192.168.2.1")] = lbl($status="ok");
#lbltable[to_addr("192.168.2.1")]$as_req=com($status_code="test");
#lbltable[to_addr("192.168.2.1")]$as_req$status_code="test3";
#print lbltable[to_addr("192.168.2.1")]$as_res$status_code;
#print lbltable;
}
event Broker::incoming_connection_established(peer_name: string)
{
if (peer_name != "central"){
print "Broker::incoming_connection_established", peer_name;
print "sending all current connections";
# Broker::send_print("bro/events/test", "1");
# Broker::send_print("bro/events/test", "myset");
# Broker::send_print("bro/events/test", "myvec");
# Broker::send_event("bro/events/my_central", Broker::event_args(my_event, "hi", 0));
# Broker::send_print("bro/events/test", "fun");
local mytest2 = mytest($b="1");
local myrecord2 = myrecordset([$b="1"],[$b="2"]);
#print myrecord2;
for (d in myrecord2){
#print d;
#print d$b;
#print "stop";
}
# print myrecord2[mytest($b="1")]$a;
# Broker::send_event("bro/events/my_event", Broker::event_args(my_event3,myrecord2[mytest($b="1")]));
for (t in lbltable){
#print "table";
#print t;
Broker::send_event("bro/events/my_event", Broker::event_args(centralautoadd,lbltable[t]));
print lbltable[t];
}
# Broker::send_event("bro/events/my_event", Broker::event_args(centralautoadd,lbltable[to_addr("192.168.2.1")]));
# Broker::send_event("bro/events/my_event", Broker::event_args(my_event2,mytest2));
}
}
event Broker::print_handler(msg: string)
{
++msg_count;
print "got print message", msg;
if ( msg_count == 3 )
#terminate();
print "sending back hello world";
Broker::send_print("bro/events/test", "hello world");
}
event Broker::incoming_connection_broken(peer_name: string)
{
print "Broker::incoming_connection_broken", peer_name;
#terminate();
}
event bro_done(){
print "finished";
}
event krb_tgs_response(c: connection, msg: KRB::KDC_Response){
# print "krb_tgs_resp";
#print msg;
}
event krb_safe(c: connection, is_orig: bool, msg: KRB::SAFE_Msg){
#A Kerberos 5 Safe Message as defined in RFC 4120. This is a safe (checksummed) application message
print "krb_save_msg__ap";
#print msg;
}
event nonexist(){
print "a";
}
event Broker::outgoing_connection_established(peer_address: string,
peer_port: port,
peer_name: string)
{
print "OUTGOING ESTABLISHED";
print "Broker::outgoing_connection_established",
peer_address, peer_port, peer_name;
# h = Broker::create_frontend("rabbitmaster");
when ( local res = Broker::keys(h) )
{
print "remote keys", res;
do_lookup(Broker::refine_to_string(Broker::vector_lookup(res$result, 0)));
}
timeout 10min #seems that the sec actually stands for ms
{ print "timeout"; }
print "sending removeevent";
Broker::send_event("bro/central/my_event", Broker::event_args(centraladdremote,to_addr("123.123.123.123"),"manual_add_from_central",network_time()));
Broker::send_event("bro/central/my_event", Broker::event_args(centralremoveremote,to_addr("12.12.12.12"),"manual_revoke_from_central",network_time()));
# event do_write();
}
event Broker::outgoing_connection_broken(peer_address: string,
peer_port: port)
{
# terminate();
}
event rdp_connect_request(c: connection, cookie: string)
{
print "rdp req";
#print fmt("%s.%d-%s.%d: %s: %s", c$id$orig_h, c$id$orig_p, c$id$resp_h, c$id$resp_p, "Username:", cookie);
}
event rdp_negotiation_response(c: connection, security_protocol: count)
{
print "rdp resp";
#print fmt("%s.%d-%s.%d: %s: %s", c$id$resp_h, c$id$resp_p, c$id$orig_h, c$id$orig_p, "Security Protocol:", c$rdp$security_protocol);
}