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/*
Unix SMB/CIFS implementation.
Authenticate by using a remote server
Copyright (C) Andrew Bartlett 2001-2002, 2008
Copyright (C) Jelmer Vernooij 2002
Copyright (C) Stefan Metzmacher 2005
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "auth/auth.h"
#include "auth/credentials/credentials.h"
#include "libcli/security/security.h"
#include "libcli/smb_composite/smb_composite.h"
#include "param/param.h"
#include "libcli/resolve/resolve.h"
/* This version of 'security=server' rewirtten from scratch for Samba4
* libraries in 2008 */
static NTSTATUS server_want_check(struct auth_method_context *ctx,
TALLOC_CTX *mem_ctx,
const struct auth_usersupplied_info *user_info)
{
return NT_STATUS_OK;
}
/**
* The challenge from the target server, when operating in security=server
**/
static NTSTATUS server_get_challenge(struct auth_method_context *ctx, TALLOC_CTX *mem_ctx, uint8_t chal[8])
{
struct smb_composite_connect io;
struct smbcli_options smb_options;
const char **host_list;
NTSTATUS status;
/* Make a connection to the target server, found by 'password server' in smb.conf */
lpcfg_smbcli_options(ctx->auth_ctx->lp_ctx, &smb_options);
/* Make a negprot, WITHOUT SPNEGO, so we get a challenge nice an easy */
io.in.options.use_spnego = false;
/* Hope we don't get * (the default), as this won't work... */
host_list = lpcfg_passwordserver(ctx->auth_ctx->lp_ctx);
if (!host_list) {
return NT_STATUS_INTERNAL_ERROR;
}
io.in.dest_host = host_list[0];
if (strequal(io.in.dest_host, "*")) {
return NT_STATUS_INTERNAL_ERROR;
}
io.in.dest_ports = lpcfg_smb_ports(ctx->auth_ctx->lp_ctx);
io.in.socket_options = lpcfg_socket_options(ctx->auth_ctx->lp_ctx);
io.in.gensec_settings = lpcfg_gensec_settings(mem_ctx, ctx->auth_ctx->lp_ctx);
io.in.called_name = strupper_talloc(mem_ctx, io.in.dest_host);
/* We don't want to get as far as the session setup */
io.in.credentials = cli_credentials_init_anon(mem_ctx);
cli_credentials_set_workstation(io.in.credentials,
lpcfg_netbios_name(ctx->auth_ctx->lp_ctx),
CRED_SPECIFIED);
io.in.service = NULL;
io.in.workgroup = ""; /* only used with SPNEGO, disabled above */
io.in.options = smb_options;
lpcfg_smbcli_session_options(ctx->auth_ctx->lp_ctx, &io.in.session_options);
status = smb_composite_connect(&io, mem_ctx, lpcfg_resolve_context(ctx->auth_ctx->lp_ctx),
ctx->auth_ctx->event_ctx);
NT_STATUS_NOT_OK_RETURN(status);
if (io.out.tree->session->transport->negotiate.secblob.length != 8) {
return NT_STATUS_INTERNAL_ERROR;
}
memcpy(chal, io.out.tree->session->transport->negotiate.secblob.data, 8);
ctx->private_data = talloc_steal(ctx, io.out.tree->session);
return NT_STATUS_OK;
}
/**
* Return an error based on username
*
* This function allows the testing of obsure errors, as well as the generation
* of NT_STATUS -> DOS error mapping tables.
*
* This module is of no value to end-users.
*
* The password is ignored.
*
* @return An NTSTATUS value based on the username
**/
static NTSTATUS server_check_password(struct auth_method_context *ctx,
TALLOC_CTX *mem_ctx,
const struct auth_usersupplied_info *user_info,
struct auth_serversupplied_info **_server_info)
{
NTSTATUS nt_status;
struct auth_serversupplied_info *server_info;
struct cli_credentials *creds;
struct smb_composite_sesssetup session_setup;
struct smbcli_session *session = talloc_get_type(ctx->private_data, struct smbcli_session);
creds = cli_credentials_init(mem_ctx);
NT_STATUS_HAVE_NO_MEMORY(creds);
cli_credentials_set_username(creds, user_info->client.account_name, CRED_SPECIFIED);
cli_credentials_set_domain(creds, user_info->client.domain_name, CRED_SPECIFIED);
switch (user_info->password_state) {
case AUTH_PASSWORD_PLAIN:
cli_credentials_set_password(creds, user_info->password.plaintext,
CRED_SPECIFIED);
break;
case AUTH_PASSWORD_HASH:
cli_credentials_set_nt_hash(creds, user_info->password.hash.nt,
CRED_SPECIFIED);
break;
case AUTH_PASSWORD_RESPONSE:
cli_credentials_set_ntlm_response(creds, &user_info->password.response.lanman, &user_info->password.response.nt, CRED_SPECIFIED);
break;
}
session_setup.in.sesskey = session->transport->negotiate.sesskey;
session_setup.in.capabilities = session->transport->negotiate.capabilities;
session_setup.in.credentials = creds;
session_setup.in.workgroup = ""; /* Only used with SPNEGO, which we are not doing */
session_setup.in.gensec_settings = lpcfg_gensec_settings(session, ctx->auth_ctx->lp_ctx);
/* Check password with remove server - this should be async some day */
nt_status = smb_composite_sesssetup(session, &session_setup);
if (!NT_STATUS_IS_OK(nt_status)) {
return nt_status;
}
server_info = talloc(mem_ctx, struct auth_serversupplied_info);
NT_STATUS_HAVE_NO_MEMORY(server_info);
server_info->num_sids = 1;
/* This returns a pointer to a struct dom_sid, which is the
* same as a 1 element list of struct dom_sid */
server_info->sids = dom_sid_parse_talloc(server_info, SID_NT_ANONYMOUS);
NT_STATUS_HAVE_NO_MEMORY(server_info->sids);
/* annoying, but the Anonymous really does have a session key,
and it is all zeros! */
server_info->user_session_key = data_blob(NULL, 0);
server_info->lm_session_key = data_blob(NULL, 0);
server_info->account_name = talloc_strdup(server_info, user_info->client.account_name);
NT_STATUS_HAVE_NO_MEMORY(server_info->account_name);
server_info->domain_name = talloc_strdup(server_info, user_info->client.domain_name);
NT_STATUS_HAVE_NO_MEMORY(server_info->domain_name);
server_info->full_name = NULL;
server_info->logon_script = talloc_strdup(server_info, "");
NT_STATUS_HAVE_NO_MEMORY(server_info->logon_script);
server_info->profile_path = talloc_strdup(server_info, "");
NT_STATUS_HAVE_NO_MEMORY(server_info->profile_path);
server_info->home_directory = talloc_strdup(server_info, "");
NT_STATUS_HAVE_NO_MEMORY(server_info->home_directory);
server_info->home_drive = talloc_strdup(server_info, "");
NT_STATUS_HAVE_NO_MEMORY(server_info->home_drive);
server_info->last_logon = 0;
server_info->last_logoff = 0;
server_info->acct_expiry = 0;
server_info->last_password_change = 0;
server_info->allow_password_change = 0;
server_info->force_password_change = 0;
server_info->logon_count = 0;
server_info->bad_password_count = 0;
server_info->acct_flags = ACB_NORMAL;
server_info->authenticated = false;
*_server_info = server_info;
return nt_status;
}
static const struct auth_operations server_auth_ops = {
.name = "server",
.get_challenge = server_get_challenge,
.want_check = server_want_check,
.check_password = server_check_password
};
_PUBLIC_ NTSTATUS auth_server_init(void)
{
NTSTATUS ret;
ret = auth_register(&server_auth_ops);
if (!NT_STATUS_IS_OK(ret)) {
DEBUG(0,("Failed to register 'server' auth backend!\n"));
return ret;
}
return ret;
}
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