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/*
auth-rh-rsa.c
Author: Tatu Ylonen <ylo@cs.hut.fi>
Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
All rights reserved
Created: Sun May 7 03:08:06 1995 ylo
Rhosts or /etc/hosts.equiv authentication combined with RSA host
authentication.
*/
/*
* $Id: auth-rh-rsa.c,v 1.3 1998/03/27 16:53:36 kivinen Exp $
* $Log: auth-rh-rsa.c,v $
* Revision 1.3 1998/03/27 16:53:36 kivinen
* Added ignore_root_rhosts support.
*
* Revision 1.2 1996/10/29 22:34:10 kivinen
* log -> log_msg.
*
* Revision 1.1.1.1 1996/02/18 21:38:12 ylo
* Imported ssh-1.2.13.
*
* Revision 1.5 1995/09/21 17:06:50 ylo
* Added ignore_rhosts.
*
* Revision 1.4 1995/08/31 09:18:58 ylo
* Tilde-expand the name of user hostfile.
*
* Revision 1.3 1995/07/13 01:12:51 ylo
* Removed the "Last modified" header.
*
* $Endlog$
*/
#include "includes.h"
#include "packet.h"
#include "ssh.h"
#include "xmalloc.h"
/* Tries to authenticate the user using the .rhosts file and the host using
its host key. Returns true if authentication succeeds.
.rhosts and .shosts will be ignored if ignore_rhosts is non-zero,
unless the user is root and ignore_root_rhosts is zero. */
int auth_rhosts_rsa(RandomState *state,
struct passwd *pw, const char *client_user,
unsigned int client_host_key_bits,
MP_INT *client_host_key_e, MP_INT *client_host_key_n,
int ignore_rhosts, int ignore_root_rhosts,
int strict_modes)
{
char *user_hostfile;
const char *canonical_hostname;
debug("Trying rhosts with RSA host authentication for %.100s", client_user);
/* Check if we would accept it using rhosts authentication. */
if (!auth_rhosts(pw, client_user, ignore_rhosts, ignore_root_rhosts,
strict_modes))
return 0;
canonical_hostname = get_canonical_hostname();
debug("Rhosts RSA authentication: canonical host %.900s",
canonical_hostname);
/* Format the name of the file containing per-user known hosts. */
user_hostfile = tilde_expand_filename(SSH_USER_HOSTFILE, pw->pw_uid);
/* Check if we know the host and its host key. */
/* Check system-wide host file. */
if (check_host_in_hostfile(pw->pw_uid, SSH_SYSTEM_HOSTFILE,
canonical_hostname,
client_host_key_bits, client_host_key_e,
client_host_key_n) != HOST_OK)
{
/* Check per-user host file. Use the user's privileges. */
if (check_host_in_hostfile(pw->pw_uid, user_hostfile, canonical_hostname,
client_host_key_bits, client_host_key_e,
client_host_key_n) != HOST_OK)
{
/* The host key was not found. */
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.");
packet_send_debug("The host name used to check the key was '%.200s'.",
get_canonical_hostname());
packet_send_debug("Try logging back from the server machine with the canonical host name using ssh, and then try again.");
return 0;
}
/* The host key was found. */
}
/* 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(state, client_host_key_bits,
client_host_key_e, client_host_key_n))
{
log_msg("Client on %.800s failed to respond correctly to host authentication.",
canonical_hostname);
return 0;
}
/* We have authenticated the user using .rhosts or /etc/hosts.equiv, and
the host using RSA. We accept the authentication. */
log_msg("Rhosts with RSA host authentication accepted for %.100s, %.100s on %.700s.",
pw->pw_name, client_user, canonical_hostname);
packet_send_debug("Rhosts with RSA host authentication accepted.");
return 1;
}
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.