1 /* $OpenBSD: sshconnect.h,v 1.31 2017/09/12 06:32:07 djm 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 struct sshkey **keys; 30 int nkeys; 31 int external_keysign; 32 }; 33 34 struct addrinfo; 35 struct ssh; 36 37 int ssh_connect(struct ssh *, const char *, struct addrinfo *, 38 struct sockaddr_storage *, u_short, int, int, int *, int, int); 39 void ssh_kill_proxy_command(void); 40 41 void ssh_login(Sensitive *, const char *, struct sockaddr *, u_short, 42 struct passwd *, int); 43 44 void ssh_exchange_identification(int); 45 46 int verify_host_key(char *, struct sockaddr *, struct sshkey *); 47 48 void get_hostfile_hostname_ipaddr(char *, struct sockaddr *, u_short, 49 char **, char **); 50 51 void ssh_kex(char *, struct sockaddr *); 52 void ssh_kex2(char *, struct sockaddr *, u_short); 53 54 void ssh_userauth1(const char *, const char *, char *, Sensitive *); 55 void ssh_userauth2(const char *, const char *, char *, Sensitive *); 56 57 void ssh_put_password(char *); 58 int ssh_local_cmd(const char *); 59 60 void maybe_add_key_to_agent(char *, struct sshkey *, char *, char *); 61 62 /* 63 * Macros to raise/lower permissions. 64 */ 65 #define PRIV_START do { \ 66 int save_errno = errno; \ 67 if (seteuid(original_effective_uid) != 0) \ 68 fatal("PRIV_START: seteuid: %s", \ 69 strerror(errno)); \ 70 errno = save_errno; \ 71 } while (0) 72 73 #define PRIV_END do { \ 74 int save_errno = errno; \ 75 if (seteuid(original_real_uid) != 0) \ 76 fatal("PRIV_END: seteuid: %s", \ 77 strerror(errno)); \ 78 errno = save_errno; \ 79 } while (0) 80