1/*	$NetBSD: monitor.h,v 1.13 2023/07/28 04:37:37 rin Exp $	*/
2/* $OpenBSD: monitor.h,v 1.23 2019/01/19 21:43:56 djm Exp $ */
3
4/*
5 * Copyright 2002 Niels Provos <provos@citi.umich.edu>
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#ifndef _MONITOR_H_
30#define _MONITOR_H_
31
32/* Please keep *_REQ_* values on even numbers and *_ANS_* on odd numbers */
33enum monitor_reqtype {
34	MONITOR_REQ_MODULI = 0, MONITOR_ANS_MODULI = 1,
35	MONITOR_REQ_FREE = 2,
36	MONITOR_REQ_AUTHSERV = 4,
37	MONITOR_REQ_SIGN = 6, MONITOR_ANS_SIGN = 7,
38	MONITOR_REQ_PWNAM = 8, MONITOR_ANS_PWNAM = 9,
39	MONITOR_REQ_AUTH2_READ_BANNER = 10, MONITOR_ANS_AUTH2_READ_BANNER = 11,
40	MONITOR_REQ_AUTHPASSWORD = 12, MONITOR_ANS_AUTHPASSWORD = 13,
41	MONITOR_REQ_BSDAUTHQUERY = 14, MONITOR_ANS_BSDAUTHQUERY = 15,
42	MONITOR_REQ_BSDAUTHRESPOND = 16, MONITOR_ANS_BSDAUTHRESPOND = 17,
43	MONITOR_REQ_SKEYQUERY = 18, MONITOR_ANS_SKEYQUERY = 19,
44	MONITOR_REQ_SKEYRESPOND = 20, MONITOR_ANS_SKEYRESPOND = 21,
45	MONITOR_REQ_KEYALLOWED = 22, MONITOR_ANS_KEYALLOWED = 23,
46	MONITOR_REQ_KEYVERIFY = 24, MONITOR_ANS_KEYVERIFY = 25,
47	MONITOR_REQ_KEYEXPORT = 26,
48	MONITOR_REQ_PTY = 28, MONITOR_ANS_PTY = 29,
49	MONITOR_REQ_PTYCLEANUP = 30,
50	MONITOR_REQ_SESSKEY = 32, MONITOR_ANS_SESSKEY = 33,
51	MONITOR_REQ_SESSID = 34,
52	MONITOR_REQ_RSAKEYALLOWED = 36, MONITOR_ANS_RSAKEYALLOWED = 37,
53	MONITOR_REQ_RSACHALLENGE = 38, MONITOR_ANS_RSACHALLENGE = 39,
54	MONITOR_REQ_RSARESPONSE = 40, MONITOR_ANS_RSARESPONSE = 41,
55	MONITOR_REQ_GSSSETUP = 42, MONITOR_ANS_GSSSETUP = 43,
56	MONITOR_REQ_GSSSTEP = 44, MONITOR_ANS_GSSSTEP = 45,
57	MONITOR_REQ_GSSUSEROK = 46, MONITOR_ANS_GSSUSEROK = 47,
58	MONITOR_REQ_GSSCHECKMIC = 48, MONITOR_ANS_GSSCHECKMIC = 49,
59	MONITOR_REQ_TERM = 50,
60	MONITOR_REQ_JPAKE_STEP1 = 52, MONITOR_ANS_JPAKE_STEP1 = 53,
61	MONITOR_REQ_JPAKE_GET_PWDATA = 54, MONITOR_ANS_JPAKE_GET_PWDATA = 55,
62	MONITOR_REQ_JPAKE_STEP2 = 56, MONITOR_ANS_JPAKE_STEP2 = 57,
63	MONITOR_REQ_JPAKE_KEY_CONFIRM = 58, MONITOR_ANS_JPAKE_KEY_CONFIRM = 59,
64	MONITOR_REQ_JPAKE_CHECK_CONFIRM = 60, MONITOR_ANS_JPAKE_CHECK_CONFIRM = 61,
65
66	MONITOR_REQ_PAM_START = 100,
67	MONITOR_REQ_PAM_ACCOUNT = 102, MONITOR_ANS_PAM_ACCOUNT = 103,
68	MONITOR_REQ_PAM_INIT_CTX = 104, MONITOR_ANS_PAM_INIT_CTX = 105,
69	MONITOR_REQ_PAM_QUERY = 106, MONITOR_ANS_PAM_QUERY = 107,
70	MONITOR_REQ_PAM_RESPOND = 108, MONITOR_ANS_PAM_RESPOND = 109,
71	MONITOR_REQ_PAM_FREE_CTX = 110, MONITOR_ANS_PAM_FREE_CTX = 111,
72	MONITOR_REQ_AUDIT_EVENT = 112, MONITOR_REQ_AUDIT_COMMAND = 113,
73
74	MONITOR_REQ_KRB4 = 200, MONITOR_ANS_KRB4 = 201,
75	MONITOR_REQ_KRB5 = 202, MONITOR_ANS_KRB5 = 203,
76
77};
78
79struct ssh;
80
81struct monitor {
82	int			 m_recvfd;
83	int			 m_sendfd;
84	int			 m_log_recvfd;
85	int			 m_log_sendfd;
86	struct kex		**m_pkex;
87	pid_t			 m_pid;
88};
89
90struct monitor *monitor_init(void);
91void monitor_reinit(struct monitor *);
92
93struct Authctxt;
94void monitor_child_preauth(struct ssh *, struct monitor *);
95void monitor_child_postauth(struct ssh *, struct monitor *)
96    __attribute__((__noreturn__));
97
98void monitor_clear_keystate(struct ssh *, struct monitor *);
99void monitor_apply_keystate(struct ssh *, struct monitor *);
100
101/* Prototypes for request sending and receiving */
102void mm_request_send(int, enum monitor_reqtype, struct sshbuf *);
103void mm_request_receive(int, struct sshbuf *);
104void mm_request_receive_expect(int, enum monitor_reqtype, struct sshbuf *);
105void mm_get_keystate(struct ssh *, struct monitor *);
106
107#endif /* _MONITOR_H_ */
108