version 1.13.2.4, 2001/03/21 18:52:33 |
version 1.14, 2000/06/20 01:39:38 |
|
|
/* |
/* |
|
* |
|
* auth-rh-rsa.c |
|
* |
* Author: Tatu Ylonen <ylo@cs.hut.fi> |
* Author: Tatu Ylonen <ylo@cs.hut.fi> |
|
* |
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
* All rights reserved |
* All rights reserved |
|
* |
|
* Created: Sun May 7 03:08:06 1995 ylo |
|
* |
* Rhosts or /etc/hosts.equiv authentication combined with RSA host |
* Rhosts or /etc/hosts.equiv authentication combined with RSA host |
* authentication. |
* 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" |
#include "includes.h" |
RCSID("$OpenBSD$"); |
RCSID("$OpenBSD$"); |
|
|
#include "packet.h" |
#include "packet.h" |
|
#include "ssh.h" |
#include "xmalloc.h" |
#include "xmalloc.h" |
#include "uidswap.h" |
#include "uidswap.h" |
#include "log.h" |
|
#include "servconf.h" |
#include "servconf.h" |
|
|
|
#include <openssl/rsa.h> |
|
#include <openssl/dsa.h> |
#include "key.h" |
#include "key.h" |
#include "hostfile.h" |
#include "hostfile.h" |
#include "pathnames.h" |
|
#include "auth.h" |
|
#include "tildexpand.h" |
|
#include "canohost.h" |
|
|
|
/* |
/* |
* Tries to authenticate the user using the .rhosts file and the host using |
* Tries to authenticate the user using the .rhosts file and the host using |
|
|
HostStatus host_status; |
HostStatus host_status; |
Key *client_key, *found; |
Key *client_key, *found; |
|
|
debug("Trying rhosts with RSA host authentication for client user %.100s", client_user); |
debug("Trying rhosts with RSA host authentication for %.100s", client_user); |
|
|
if (pw == NULL || client_host_key == NULL) |
if (client_host_key == NULL) |
return 0; |
return 0; |
|
|
/* Check if we would accept it using rhosts authentication. */ |
/* Check if we would accept it using rhosts authentication. */ |
if (!auth_rhosts(pw, client_user)) |
if (!auth_rhosts(pw, client_user)) |
return 0; |
return 0; |
|
|
canonical_hostname = get_canonical_hostname( |
canonical_hostname = get_canonical_hostname(); |
options.reverse_mapping_check); |
|
|
|
debug("Rhosts RSA authentication: canonical host %.900s", canonical_hostname); |
debug("Rhosts RSA authentication: canonical host %.900s", canonical_hostname); |
|
|
/* wrap the RSA key into a 'generic' key */ |
/* wrap the RSA key into a 'generic' key */ |
client_key = key_new(KEY_RSA1); |
client_key = key_new(KEY_RSA); |
BN_copy(client_key->rsa->e, client_host_key->e); |
BN_copy(client_key->rsa->e, client_host_key->e); |
BN_copy(client_key->rsa->n, client_host_key->n); |
BN_copy(client_key->rsa->n, client_host_key->n); |
found = key_new(KEY_RSA1); |
found = key_new(KEY_RSA); |
|
|
/* Check if we know the host and its host key. */ |
/* Check if we know the host and its host key. */ |
host_status = check_host_in_hostfile(_PATH_SSH_SYSTEM_HOSTFILE, canonical_hostname, |
host_status = check_host_in_hostfile(SSH_SYSTEM_HOSTFILE, canonical_hostname, |
client_key, found, NULL); |
client_key, found); |
|
|
/* Check user host file unless ignored. */ |
/* Check user host file unless ignored. */ |
if (host_status != HOST_OK && !options.ignore_user_known_hosts) { |
if (host_status != HOST_OK && !options.ignore_user_known_hosts) { |
struct stat st; |
struct stat st; |
char *user_hostfile = tilde_expand_filename(_PATH_SSH_USER_HOSTFILE, pw->pw_uid); |
char *user_hostfile = tilde_expand_filename(SSH_USER_HOSTFILE, pw->pw_uid); |
/* |
/* |
* Check file permissions of _PATH_SSH_USER_HOSTFILE, auth_rsa() |
* Check file permissions of SSH_USER_HOSTFILE, auth_rsa() |
* did already check pw->pw_dir, but there is a race XXX |
* did already check pw->pw_dir, but there is a race XXX |
*/ |
*/ |
if (options.strict_modes && |
if (options.strict_modes && |
|
|
/* XXX race between stat and the following open() */ |
/* XXX race between stat and the following open() */ |
temporarily_use_uid(pw->pw_uid); |
temporarily_use_uid(pw->pw_uid); |
host_status = check_host_in_hostfile(user_hostfile, canonical_hostname, |
host_status = check_host_in_hostfile(user_hostfile, canonical_hostname, |
client_key, found, NULL); |
client_key, found); |
restore_uid(); |
restore_uid(); |
} |
} |
xfree(user_hostfile); |
xfree(user_hostfile); |