sslrelay 0.6.2

A TCP relay library for relaying/modifying/spoofing TCP traffic by implementing callback code.
Documentation 
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

//! SSLRelay

use crate::{
    SSLRelay,
    HandlerCallbacks,
    InnerHandlers,
    TCPDataType,
    TcpListener,
    thread,
    FullDuplexTcp,
    DataStreamType,
    RelayConfig,
    Arc,
    SslAcceptor,
    Path,
    SslMethod,
    SslFiletype,
    TLSConfig,
    PKey,
    X509,
};

impl<H: HandlerCallbacks + std::marker::Sync + std::marker::Send + Clone + 'static> SSLRelay<H> {
    /// Creates new SSLRelay instance.
    pub fn new(handlers: H, config: RelayConfig) -> Self {

        SSLRelay {
            config,
            handlers: Some(InnerHandlers{cb: handlers}),
        }
    }
    /// Starts the SSLRelay connection handling.
    pub fn start(&mut self) {

        let rhost = self.config.remote_host.clone();
        let rport = self.config.remote_port.clone();
        let upstream_data_stream_type = self.config.upstream_data_type;

        let listener = TcpListener::bind(format!("{}:{}", self.config.bind_host.clone(), self.config.bind_port.clone())).unwrap();

        match self.config.downstream_data_type {

            TCPDataType::TLS => {
    
                let acceptor = self.setup_ssl_config(self.config.tls_config.clone());

                for stream in listener.incoming() {
        
                    match stream {
                        Ok(stream) => {
        
                            let acceptor = acceptor.clone();
                            let handler_clone = self.handlers.as_ref().unwrap().clone();
        
                            let r_host = rhost.clone();
                            let r_port = rport.clone();
        
                            thread::spawn(move || {
        
                                match acceptor.accept(stream) {
                                    Ok(stream) => {
                                        // FULL DUPLEX OBJECT CREATION HERE
                                       match FullDuplexTcp::new(DataStreamType::TLS(stream), upstream_data_stream_type, r_host, r_port, handler_clone) {
                                           Ok(mut fdtcp) => fdtcp.handle(),
                                           Err(_ec) => {println!("[SSLRelay Error] Failed to handle TCP(TLS) connection: {}", _ec)}
                                       }
                                    },
                                    Err(e) => {
        
                                        println!("[Error] {}", e);
                                    }
                                }
                            });
                        },
                        Err(e) => {println!("[Error] Tcp Connection Failed: {}", e)}
                    }
                }
            },

            TCPDataType::RAW => {

                for stream in listener.incoming() {
        
                    match stream {
                        Ok(stream) => {
        
                            let handler_clone = self.handlers.as_ref().unwrap().clone();
        
                            let r_host = rhost.clone();
                            let r_port = rport.clone();
        
                            thread::spawn(move || {
    
                                // FULL DUPLEX OBJECT CREATION HERE
                                match FullDuplexTcp::new(DataStreamType::RAW(stream), upstream_data_stream_type, r_host, r_port, handler_clone) {
                                    Ok(mut fdtcp) => fdtcp.handle(),
                                    Err(_ec) => println!("[SSLRelay Error] Failed to handle TCP connection: {}", _ec),
                                }
                            });
                        },
                        Err(e) => {println!("[Error] Tcp Connection Failed: {}", e)}
                    }
                }
            }
        }
    }

    fn setup_ssl_config(&self, tls_config: TLSConfig) -> Arc<SslAcceptor> {

        let mut acceptor = SslAcceptor::mozilla_intermediate(SslMethod::tls()).unwrap();

        match tls_config {
            TLSConfig::FILE{certificate_path, private_key_path} => {

                if !Path::new(&private_key_path).exists() {
                    panic!("[-] [{}] does not exist!", private_key_path);
                }
                if !Path::new(&certificate_path).exists() {
                    panic!("[-] [{}] does not exist!", certificate_path);
                }
                acceptor.set_private_key_file(private_key_path, SslFiletype::PEM).unwrap();
                acceptor.set_certificate_chain_file(certificate_path).unwrap();
                acceptor.check_private_key().unwrap();
            },
            TLSConfig::DATA{certificate, private_key} => {
                let x_509_certificate = X509::from_pem(certificate.as_slice()).unwrap();
                let private_key = PKey::private_key_from_pem(private_key.as_slice()).unwrap();
                acceptor.set_certificate(x_509_certificate.as_ref()).unwrap();
                acceptor.set_private_key(private_key.as_ref()).unwrap();
            },
            TLSConfig::NONE => {
                panic!("[SSLRelay Error] Specified NONE for TLSConfig and downstream_data_type as TLS.");
            }
        }
        Arc::new(acceptor.build())
    }
}// SSLRelay