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monitor.h
1 /* $OpenBSD: monitor.h,v 1.23 2019/01/19 21:43:56 djm Exp $ */
2 
3 /*
4  * Copyright 2002 Niels Provos <[email protected]>
5  * All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  * notice, this list of conditions and the following disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  * notice, this list of conditions and the following disclaimer in the
14  * documentation and/or other materials provided with the distribution.
15  *
16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26  */
27 
28 #ifndef _MONITOR_H_
29 #define _MONITOR_H_
30 
31 /* Please keep *_REQ_* values on even numbers and *_ANS_* on odd numbers */
32 enum monitor_reqtype {
33  MONITOR_REQ_MODULI = 0, MONITOR_ANS_MODULI = 1,
34  MONITOR_REQ_FREE = 2,
35  MONITOR_REQ_AUTHSERV = 4,
36  MONITOR_REQ_SIGN = 6, MONITOR_ANS_SIGN = 7,
37  MONITOR_REQ_PWNAM = 8, MONITOR_ANS_PWNAM = 9,
38  MONITOR_REQ_AUTH2_READ_BANNER = 10, MONITOR_ANS_AUTH2_READ_BANNER = 11,
39  MONITOR_REQ_AUTHPASSWORD = 12, MONITOR_ANS_AUTHPASSWORD = 13,
40  MONITOR_REQ_BSDAUTHQUERY = 14, MONITOR_ANS_BSDAUTHQUERY = 15,
41  MONITOR_REQ_BSDAUTHRESPOND = 16, MONITOR_ANS_BSDAUTHRESPOND = 17,
42  MONITOR_REQ_KEYALLOWED = 22, MONITOR_ANS_KEYALLOWED = 23,
43  MONITOR_REQ_KEYVERIFY = 24, MONITOR_ANS_KEYVERIFY = 25,
44  MONITOR_REQ_KEYEXPORT = 26,
45  MONITOR_REQ_PTY = 28, MONITOR_ANS_PTY = 29,
46  MONITOR_REQ_PTYCLEANUP = 30,
47  MONITOR_REQ_SESSKEY = 32, MONITOR_ANS_SESSKEY = 33,
48  MONITOR_REQ_SESSID = 34,
49  MONITOR_REQ_RSAKEYALLOWED = 36, MONITOR_ANS_RSAKEYALLOWED = 37,
50  MONITOR_REQ_RSACHALLENGE = 38, MONITOR_ANS_RSACHALLENGE = 39,
51  MONITOR_REQ_RSARESPONSE = 40, MONITOR_ANS_RSARESPONSE = 41,
52  MONITOR_REQ_GSSSETUP = 42, MONITOR_ANS_GSSSETUP = 43,
53  MONITOR_REQ_GSSSTEP = 44, MONITOR_ANS_GSSSTEP = 45,
54  MONITOR_REQ_GSSUSEROK = 46, MONITOR_ANS_GSSUSEROK = 47,
55  MONITOR_REQ_GSSCHECKMIC = 48, MONITOR_ANS_GSSCHECKMIC = 49,
56  MONITOR_REQ_TERM = 50,
57 
58 #ifdef WITH_SELINUX
59  MONITOR_REQ_AUTHROLE = 80,
60 #endif
61 
62  MONITOR_REQ_PAM_START = 100,
63  MONITOR_REQ_PAM_ACCOUNT = 102, MONITOR_ANS_PAM_ACCOUNT = 103,
64  MONITOR_REQ_PAM_INIT_CTX = 104, MONITOR_ANS_PAM_INIT_CTX = 105,
65  MONITOR_REQ_PAM_QUERY = 106, MONITOR_ANS_PAM_QUERY = 107,
66  MONITOR_REQ_PAM_RESPOND = 108, MONITOR_ANS_PAM_RESPOND = 109,
67  MONITOR_REQ_PAM_FREE_CTX = 110, MONITOR_ANS_PAM_FREE_CTX = 111,
68  MONITOR_REQ_AUDIT_EVENT = 112,
69  MONITOR_REQ_AUDIT_COMMAND = 114, MONITOR_ANS_AUDIT_COMMAND = 115,
70  MONITOR_REQ_AUDIT_END_COMMAND = 116,
71  MONITOR_REQ_AUDIT_UNSUPPORTED = 118, MONITOR_ANS_AUDIT_UNSUPPORTED = 119,
72  MONITOR_REQ_AUDIT_KEX = 120, MONITOR_ANS_AUDIT_KEX = 121,
73  MONITOR_REQ_AUDIT_SESSION_KEY_FREE = 122, MONITOR_ANS_AUDIT_SESSION_KEY_FREE = 123,
74  MONITOR_REQ_AUDIT_SERVER_KEY_FREE = 124,
75 
76  MONITOR_REQ_GSSSIGN = 150, MONITOR_ANS_GSSSIGN = 151,
77  MONITOR_REQ_GSSUPCREDS = 152, MONITOR_ANS_GSSUPCREDS = 153,
78 
79  MONITOR_REQ_GSSMECHS = 200, MONITOR_ANS_GSSMECHS = 201,
80  MONITOR_REQ_GSSLOCALNAME = 202, MONITOR_ANS_GSSLOCALNAME = 203,
81  MONITOR_REQ_GSSERR = 204, MONITOR_ANS_GSSERR = 205
82 };
83 
84 struct ssh;
85 
86 struct monitor {
87  int m_recvfd;
88  int m_sendfd;
89  int m_log_recvfd;
90  int m_log_sendfd;
91  struct kex **m_pkex;
92  pid_t m_pid;
93  char *m_state;
94 };
95 
96 struct monitor *monitor_init(void);
97 void monitor_reinit(struct monitor *, const char *);
98 
99 struct Authctxt;
100 void monitor_child_preauth(struct ssh *, struct monitor *);
101 void monitor_child_postauth(struct ssh *, struct monitor *);
102 
103 void monitor_clear_keystate(struct ssh *, struct monitor *);
104 void monitor_apply_keystate(struct ssh *, struct monitor *);
105 
106 /* Prototypes for request sending and receiving */
107 void mm_request_send(int, enum monitor_reqtype, struct sshbuf *);
108 void mm_request_receive(int, struct sshbuf *);
109 void mm_request_receive_expect(int, enum monitor_reqtype, struct sshbuf *);
110 void mm_get_keystate(struct ssh *, struct monitor *);
111 
112 #endif /* _MONITOR_H_ */
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