crypto/openssh/monitor.h

   1 /* $OpenBSD: monitor.h,v 1.23 2019/01/19 21:43:56 djm Exp $ */
   2
   3 /*
   4  * Copyright 2002 Niels Provos <provos@citi.umich.edu>
   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         MONITOR_REQ_PAM_START = 100,
  59         MONITOR_REQ_PAM_ACCOUNT = 102, MONITOR_ANS_PAM_ACCOUNT = 103,
  60         MONITOR_REQ_PAM_INIT_CTX = 104, MONITOR_ANS_PAM_INIT_CTX = 105,
  61         MONITOR_REQ_PAM_QUERY = 106, MONITOR_ANS_PAM_QUERY = 107,
  62         MONITOR_REQ_PAM_RESPOND = 108, MONITOR_ANS_PAM_RESPOND = 109,
  63         MONITOR_REQ_PAM_FREE_CTX = 110, MONITOR_ANS_PAM_FREE_CTX = 111,
  64         MONITOR_REQ_AUDIT_EVENT = 112, MONITOR_REQ_AUDIT_COMMAND = 113,
  65
  66 };
  67
  68 struct ssh;
  69
  70 struct monitor {
  71         int                      m_recvfd;
  72         int                      m_sendfd;
  73         int                      m_log_recvfd;
  74         int                      m_log_sendfd;
  75         struct kex              **m_pkex;
  76         pid_t                    m_pid;
  77 };
  78
  79 struct monitor *monitor_init(void);
  80 void monitor_reinit(struct monitor *);
  81
  82 struct Authctxt;
  83 void monitor_child_preauth(struct ssh *, struct monitor *);
  84 void monitor_child_postauth(struct ssh *, struct monitor *);
  85
  86 void monitor_clear_keystate(struct ssh *, struct monitor *);
  87 void monitor_apply_keystate(struct ssh *, struct monitor *);
  88
  89 /* Prototypes for request sending and receiving */
  90 void mm_request_send(int, enum monitor_reqtype, struct sshbuf *);
  91 void mm_request_receive(int, struct sshbuf *);
  92 void mm_request_receive_expect(int, enum monitor_reqtype, struct sshbuf *);
  93 void mm_get_keystate(struct ssh *, struct monitor *);
  94
  95 #endif /* _MONITOR_H_ */