1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
use std::marker::Unpin;
use std::net;
use std::str::FromStr;
use crate::actors::v1_read::QueryServerReadV1;
use futures_util::sink::SinkExt;
use futures_util::stream::StreamExt;
use kanidmd_lib::idm::ldap::{LdapBoundToken, LdapResponseState};
use kanidmd_lib::prelude::*;
use ldap3_proto::proto::LdapMsg;
use ldap3_proto::LdapCodec;
use openssl::ssl::{Ssl, SslAcceptor, SslAcceptorBuilder};
use tokio::io::{AsyncRead, AsyncWrite};
use tokio::net::TcpListener;
use tokio_openssl::SslStream;
use tokio_util::codec::{FramedRead, FramedWrite};
use crate::CoreAction;
use tokio::sync::broadcast;
struct LdapSession {
uat: Option<LdapBoundToken>,
}
impl LdapSession {
fn new() -> Self {
LdapSession {
uat: None,
}
}
}
#[instrument(name = "ldap-request", skip(client_address, qe_r_ref))]
async fn client_process_msg(
uat: Option<LdapBoundToken>,
client_address: net::SocketAddr,
protomsg: LdapMsg,
qe_r_ref: &'static QueryServerReadV1,
) -> Option<LdapResponseState> {
let eventid = sketching::tracing_forest::id();
security_info!(
client_ip = %client_address.ip(),
client_port = %client_address.port(),
"LDAP client"
);
qe_r_ref.handle_ldaprequest(eventid, protomsg, uat).await
}
async fn client_process<W: AsyncWrite + Unpin, R: AsyncRead + Unpin>(
mut r: FramedRead<R, LdapCodec>,
mut w: FramedWrite<W, LdapCodec>,
client_address: net::SocketAddr,
qe_r_ref: &'static QueryServerReadV1,
) {
let mut session = LdapSession::new();
while let Some(Ok(protomsg)) = r.next().await {
let uat = session.uat.clone();
let caddr = client_address;
match client_process_msg(uat, caddr, protomsg, qe_r_ref).await {
Some(LdapResponseState::Unbind) => return,
Some(LdapResponseState::Disconnect(rmsg)) => {
if w.send(rmsg).await.is_err() {
break;
}
break;
}
Some(LdapResponseState::Bind(uat, rmsg)) => {
session.uat = Some(uat);
if w.send(rmsg).await.is_err() {
break;
}
}
Some(LdapResponseState::Respond(rmsg)) => {
if w.send(rmsg).await.is_err() {
break;
}
}
Some(LdapResponseState::MultiPartResponse(v)) => {
for rmsg in v.into_iter() {
if w.send(rmsg).await.is_err() {
break;
}
}
}
Some(LdapResponseState::BindMultiPartResponse(uat, v)) => {
session.uat = Some(uat);
for rmsg in v.into_iter() {
if w.send(rmsg).await.is_err() {
break;
}
}
}
None => {
error!("Internal server error");
break;
}
};
}
}
async fn tls_acceptor(
listener: TcpListener,
tls_parms: SslAcceptor,
qe_r_ref: &'static QueryServerReadV1,
mut rx: broadcast::Receiver<CoreAction>,
) {
loop {
tokio::select! {
Ok(action) = rx.recv() => {
match action {
CoreAction::Shutdown => break,
}
}
accept_result = listener.accept() => {
match accept_result {
Ok((tcpstream, client_socket_addr)) => {
let mut tlsstream = match Ssl::new(tls_parms.context())
.and_then(|tls_obj| SslStream::new(tls_obj, tcpstream))
{
Ok(ta) => ta,
Err(e) => {
error!("LDAP TLS setup error, continuing -> {:?}", e);
continue;
}
};
if let Err(e) = SslStream::accept(Pin::new(&mut tlsstream)).await {
error!("LDAP TLS accept error, continuing -> {:?}", e);
continue;
};
let (r, w) = tokio::io::split(tlsstream);
let r = FramedRead::new(r, LdapCodec);
let w = FramedWrite::new(w, LdapCodec);
tokio::spawn(client_process(r, w, client_socket_addr, qe_r_ref));
}
Err(e) => {
error!("LDAP acceptor error, continuing -> {:?}", e);
}
}
}
}
}
info!("Stopped LdapAcceptorActor");
}
pub(crate) async fn create_ldap_server(
address: &str,
opt_tls_params: Option<SslAcceptorBuilder>,
qe_r_ref: &'static QueryServerReadV1,
rx: broadcast::Receiver<CoreAction>,
) -> Result<tokio::task::JoinHandle<()>, ()> {
if address.starts_with(":::") {
let port = address.replacen(":::", "", 1);
error!("Address '{}' looks like an attempt to wildcard bind with IPv6 on port {} - please try using ldapbindaddress = '[::]:{}'", address, port, port);
};
let addr = net::SocketAddr::from_str(address).map_err(|e| {
error!("Could not parse LDAP server address {} -> {:?}", address, e);
})?;
let listener = TcpListener::bind(&addr).await.map_err(|e| {
error!(
"Could not bind to LDAP server address {} -> {:?}",
address, e
);
})?;
let ldap_acceptor_handle = match opt_tls_params {
Some(tls_params) => {
info!("Starting LDAPS interface ldaps://{} ...", address);
let tls_parms = tls_params.build();
tokio::spawn(tls_acceptor(listener, tls_parms, qe_r_ref, rx))
}
None => {
error!("The server won't run without TLS!");
return Err(());
}
};
info!("Created LDAP interface");
Ok(ldap_acceptor_handle)
}