mirror of
git://anongit.mindrot.org/openssh.git
synced 2024-11-28 16:23:23 +08:00
0dc1bef12d
[auth-rh-rsa.c auth-rhosts.c auth2-chall.c auth2-gss.c channels.c]
[cipher-ctr.c gss-genr.c gss-serv.c kex.c moduli.c readconf.c]
[serverloop.c session.c sftp-client.c sftp.c ssh-add.c ssh-keygen.c]
[sshconnect.c sshconnect2.c]
knf says that a 2nd level indent is four (not three or five) spaces
93 lines
2.8 KiB
C
93 lines
2.8 KiB
C
/*
|
|
* Author: Tatu Ylonen <ylo@cs.hut.fi>
|
|
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
|
|
* All rights reserved
|
|
* Rhosts or /etc/hosts.equiv authentication combined with RSA host
|
|
* authentication.
|
|
*
|
|
* As far as I am concerned, the code I have written for this software
|
|
* can be used freely for any purpose. Any derived versions of this
|
|
* software must be clearly marked as such, and if the derived work is
|
|
* incompatible with the protocol description in the RFC file, it must be
|
|
* called by a name other than "ssh" or "Secure Shell".
|
|
*/
|
|
|
|
#include "includes.h"
|
|
RCSID("$OpenBSD: auth-rh-rsa.c,v 1.38 2005/07/17 07:17:54 djm Exp $");
|
|
|
|
#include "packet.h"
|
|
#include "uidswap.h"
|
|
#include "log.h"
|
|
#include "servconf.h"
|
|
#include "key.h"
|
|
#include "hostfile.h"
|
|
#include "pathnames.h"
|
|
#include "auth.h"
|
|
#include "canohost.h"
|
|
|
|
#include "monitor_wrap.h"
|
|
|
|
/* import */
|
|
extern ServerOptions options;
|
|
|
|
int
|
|
auth_rhosts_rsa_key_allowed(struct passwd *pw, char *cuser, char *chost,
|
|
Key *client_host_key)
|
|
{
|
|
HostStatus host_status;
|
|
|
|
/* Check if we would accept it using rhosts authentication. */
|
|
if (!auth_rhosts(pw, cuser))
|
|
return 0;
|
|
|
|
host_status = check_key_in_hostfiles(pw, client_host_key,
|
|
chost, _PATH_SSH_SYSTEM_HOSTFILE,
|
|
options.ignore_user_known_hosts ? NULL : _PATH_SSH_USER_HOSTFILE);
|
|
|
|
return (host_status == HOST_OK);
|
|
}
|
|
|
|
/*
|
|
* Tries to authenticate the user using the .rhosts file and the host using
|
|
* its host key. Returns true if authentication succeeds.
|
|
*/
|
|
int
|
|
auth_rhosts_rsa(Authctxt *authctxt, char *cuser, Key *client_host_key)
|
|
{
|
|
char *chost;
|
|
struct passwd *pw = authctxt->pw;
|
|
|
|
debug("Trying rhosts with RSA host authentication for client user %.100s",
|
|
cuser);
|
|
|
|
if (!authctxt->valid || client_host_key == NULL ||
|
|
client_host_key->rsa == NULL)
|
|
return 0;
|
|
|
|
chost = (char *)get_canonical_hostname(options.use_dns);
|
|
debug("Rhosts RSA authentication: canonical host %.900s", chost);
|
|
|
|
if (!PRIVSEP(auth_rhosts_rsa_key_allowed(pw, cuser, chost, client_host_key))) {
|
|
debug("Rhosts with RSA host authentication denied: unknown or invalid host key");
|
|
packet_send_debug("Your host key cannot be verified: unknown or invalid host key.");
|
|
return 0;
|
|
}
|
|
/* A matching host key was found and is known. */
|
|
|
|
/* Perform the challenge-response dialog with the client for the host key. */
|
|
if (!auth_rsa_challenge_dialog(client_host_key)) {
|
|
logit("Client on %.800s failed to respond correctly to host authentication.",
|
|
chost);
|
|
return 0;
|
|
}
|
|
/*
|
|
* We have authenticated the user using .rhosts or /etc/hosts.equiv,
|
|
* and the host using RSA. We accept the authentication.
|
|
*/
|
|
|
|
verbose("Rhosts with RSA host authentication accepted for %.100s, %.100s on %.700s.",
|
|
pw->pw_name, cuser, chost);
|
|
packet_send_debug("Rhosts with RSA host authentication accepted.");
|
|
return 1;
|
|
}
|