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
|
#![no_main]
#[macro_use]
extern crate libfuzzer_sys;
extern crate rustls;
use std::io;
use std::sync::Arc;
use rustls::server::{Accepted, Acceptor};
use rustls::{ServerConfig, ServerConnection};
fuzz_target!(|data: &[u8]| {
let _ = env_logger::try_init();
match data.split_first() {
Some((0x00, rest)) => fuzz_buffered_api(rest),
Some((0x01, rest)) => fuzz_acceptor_api(rest),
Some((_, _)) | None => {}
}
});
fn fuzz_buffered_api(data: &[u8]) {
let config = Arc::new(
ServerConfig::builder_with_provider(rustls_fuzzing_provider::provider().into())
.with_safe_default_protocol_versions()
.unwrap()
.with_no_client_auth()
.with_cert_resolver(rustls_fuzzing_provider::server_cert_resolver()),
);
let mut stream = io::Cursor::new(data);
let mut server = ServerConnection::new(config).unwrap();
service_connection(&mut stream, &mut server);
}
fn fuzz_acceptor_api(data: &[u8]) {
let mut server = Acceptor::default();
let mut stream = io::Cursor::new(data);
loop {
let rd = server
.read_tls(&mut stream)
.unwrap_or(0);
match server.accept() {
Ok(Some(accepted)) => {
fuzz_accepted(&mut stream, accepted);
break;
}
Err(_) => {
break;
}
Ok(None) => {}
}
if rd == 0 {
break;
}
}
}
fn fuzz_accepted(stream: &mut dyn io::Read, accepted: Accepted) {
let mut maybe_server = accepted.into_connection(Arc::new(
ServerConfig::builder_with_provider(rustls_fuzzing_provider::provider().into())
.with_safe_default_protocol_versions()
.unwrap()
.with_no_client_auth()
.with_cert_resolver(rustls_fuzzing_provider::server_cert_resolver()),
));
if let Ok(conn) = &mut maybe_server {
service_connection(stream, conn);
}
}
fn service_connection(stream: &mut dyn io::Read, server: &mut ServerConnection) {
loop {
let rd = server.read_tls(stream);
if server.process_new_packets().is_err() {
break;
}
if matches!(rd, Ok(0) | Err(_)) {
break;
}
// gather and discard written data
let mut wr = vec![];
server.write_tls(&mut &mut wr).unwrap();
}
}
|
