crypto/openssh/sshconnect.h

   1 /* $OpenBSD: sshconnect.h,v 1.29 2015/11/15 22:26:49 jcs Exp $ */
   2
   3 /*
   4  * Copyright (c) 2000 Markus Friedl.  All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25  */
  26
  27 typedef struct Sensitive Sensitive;
  28 struct Sensitive {
  29         Key     **keys;
  30         int     nkeys;
  31         int     external_keysign;
  32 };
  33
  34 struct addrinfo;
  35 int      ssh_connect(const char *, struct addrinfo *, struct sockaddr_storage *,
  36     u_short, int, int, int *, int, int);
  37 void     ssh_kill_proxy_command(void);
  38
  39 void     ssh_login(Sensitive *, const char *, struct sockaddr *, u_short,
  40     struct passwd *, int);
  41
  42 void     ssh_exchange_identification(int);
  43
  44 int      verify_host_key(char *, struct sockaddr *, Key *);
  45
  46 void     get_hostfile_hostname_ipaddr(char *, struct sockaddr *, u_short,
  47     char **, char **);
  48
  49 void     ssh_kex(char *, struct sockaddr *);
  50 void     ssh_kex2(char *, struct sockaddr *, u_short);
  51
  52 void     ssh_userauth1(const char *, const char *, char *, Sensitive *);
  53 void     ssh_userauth2(const char *, const char *, char *, Sensitive *);
  54
  55 void     ssh_put_password(char *);
  56 int      ssh_local_cmd(const char *);
  57
  58 void     maybe_add_key_to_agent(char *, Key *, char *, char *);
  59
  60 /*
  61  * Macros to raise/lower permissions.
  62  */
  63 #define PRIV_START do {                                 \
  64         int save_errno = errno;                         \
  65         if (seteuid(original_effective_uid) != 0)       \
  66                 fatal("PRIV_START: seteuid: %s",        \
  67                     strerror(errno));                   \
  68         errno = save_errno;                             \
  69 } while (0)
  70
  71 #define PRIV_END do {                                   \
  72         int save_errno = errno;                         \
  73         if (seteuid(original_real_uid) != 0)            \
  74                 fatal("PRIV_END: seteuid: %s",          \
  75                     strerror(errno));                   \
  76         errno = save_errno;                             \
  77 } while (0)