File: [local] / src / usr.bin / ssh / Attic / auth-rh-rsa.c (download)
Revision 1.1, Tue Sep 28 04:45:35 1999 UTC (24 years, 8 months ago) by provos
Branch: MAIN
convert all uses of gmp to SSL bignum
convert all used of rsa to SSL rsa functions
remove all use of randomstate to OpenBSD arc4random() and arc4_stir()
all this done at a long long night in Canada.
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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.
*/
#include "includes.h"
RCSID("$Id: auth-rh-rsa.c,v 1.1 1999/09/28 04:45:35 provos Exp $");
#include "packet.h"
#include "ssh.h"
#include "xmalloc.h"
#include "uidswap.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. */
int auth_rhosts_rsa(struct passwd *pw, const char *client_user,
unsigned int client_host_key_bits,
BIGNUM *client_host_key_e, BIGNUM *client_host_key_n,
int ignore_rhosts, int strict_modes)
{
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, strict_modes))
return 0;
canonical_hostname = get_canonical_hostname();
debug("Rhosts RSA authentication: canonical host %.900s",
canonical_hostname);
/* Check if we know the host and its host key. */
/* Check system-wide host file. */
if (check_host_in_hostfile(SSH_SYSTEM_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.");
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_bits,
client_host_key_e, client_host_key_n))
{
log("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("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;
}