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/*
Unix SMB/Netbios implementation.
Version 3.0
handle NLTMSSP, server side
Copyright (C) Andrew Tridgell 2001
Copyright (C) Andrew Bartlett 2001-2005,2011
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.h"
#include "libcli/security/security.h"
NTSTATUS auth3_generate_session_info(struct auth4_context *auth_context,
TALLOC_CTX *mem_ctx,
void *server_returned_info,
const char *original_user_name,
uint32_t session_info_flags,
struct auth_session_info **session_info)
{
struct auth_user_info_dc *user_info = NULL;
struct auth_serversupplied_info *server_info = NULL;
NTSTATUS nt_status;
/*
* This is a hack, some callers...
*
* Some callers pass auth_user_info_dc, the SCHANNEL and
* NCALRPC_AS_SYSTEM gensec modules.
*
* While the reset passes auth3_check_password() returned.
*/
user_info = talloc_get_type(server_returned_info,
struct auth_user_info_dc);
if (user_info != NULL) {
const struct dom_sid *sid;
int cmp;
/*
* This should only be called from SCHANNEL or NCALRPC_AS_SYSTEM
*/
if (user_info->num_sids != 1) {
return NT_STATUS_INTERNAL_ERROR;
}
sid = &user_info->sids[PRIMARY_USER_SID_INDEX];
cmp = dom_sid_compare(sid, &global_sid_System);
if (cmp == 0) {
return make_session_info_system(mem_ctx, session_info);
}
cmp = dom_sid_compare(sid, &global_sid_Anonymous);
if (cmp == 0) {
/*
* TODO: use auth_anonymous_session_info() here?
*/
return make_session_info_guest(mem_ctx, session_info);
}
return NT_STATUS_INTERNAL_ERROR;
}
server_info = talloc_get_type_abort(server_returned_info,
struct auth_serversupplied_info);
nt_status = create_local_token(mem_ctx,
server_info,
NULL,
original_user_name,
session_info);
if (!NT_STATUS_IS_OK(nt_status)) {
DEBUG(10, ("create_local_token failed: %s\n",
nt_errstr(nt_status)));
return nt_status;
}
return NT_STATUS_OK;
}
/**
* Return the challenge as determined by the authentication subsystem
* @return an 8 byte random challenge
*/
NTSTATUS auth3_get_challenge(struct auth4_context *auth4_context,
uint8_t chal[8])
{
struct auth_context *auth_context = talloc_get_type_abort(auth4_context->private_data,
struct auth_context);
auth_get_ntlm_challenge(auth_context, chal);
return NT_STATUS_OK;
}
/**
* NTLM2 authentication modifies the effective challenge,
* @param challenge The new challenge value
*/
NTSTATUS auth3_set_challenge(struct auth4_context *auth4_context, const uint8_t *chal,
const char *challenge_set_by)
{
struct auth_context *auth_context = talloc_get_type_abort(auth4_context->private_data,
struct auth_context);
auth_context->challenge = data_blob_talloc(auth_context,
chal, 8);
NT_STATUS_HAVE_NO_MEMORY(auth_context->challenge.data);
auth_context->challenge_set_by = talloc_strdup(auth_context, challenge_set_by);
NT_STATUS_HAVE_NO_MEMORY(auth_context->challenge_set_by);
DEBUG(5, ("auth_context challenge set by %s\n", auth_context->challenge_set_by));
DEBUG(5, ("challenge is: \n"));
dump_data(5, auth_context->challenge.data, auth_context->challenge.length);
return NT_STATUS_OK;
}
/**
* Check the password on an NTLMSSP login.
*
* Return the session keys used on the connection.
*/
NTSTATUS auth3_check_password(struct auth4_context *auth4_context,
TALLOC_CTX *mem_ctx,
const struct auth_usersupplied_info *user_info,
uint8_t *pauthoritative,
void **server_returned_info,
DATA_BLOB *session_key, DATA_BLOB *lm_session_key)
{
struct auth_context *auth_context = talloc_get_type_abort(auth4_context->private_data,
struct auth_context);
struct auth_usersupplied_info *mapped_user_info = NULL;
struct auth_serversupplied_info *server_info;
NTSTATUS nt_status;
bool username_was_mapped;
/*
* Be authoritative by default.
*/
*pauthoritative = 1;
/* The client has given us its machine name (which we only get over NBT transport).
We need to possibly reload smb.conf if smb.conf includes depend on the machine name. */
set_remote_machine_name(user_info->workstation_name, True);
/* setup the string used by %U */
/* sub_set_smb_name checks for weird internally */
sub_set_smb_name(user_info->client.account_name);
lp_load_with_shares(get_dyn_CONFIGFILE());
nt_status = make_user_info_map(talloc_tos(),
&mapped_user_info,
user_info->client.account_name,
user_info->client.domain_name,
user_info->workstation_name,
user_info->remote_host,
user_info->service_description,
user_info->password.response.lanman.data ? &user_info->password.response.lanman : NULL,
user_info->password.response.nt.data ? &user_info->password.response.nt : NULL,
NULL, NULL, NULL,
AUTH_PASSWORD_RESPONSE);
if (!NT_STATUS_IS_OK(nt_status)) {
return nt_status;
}
mapped_user_info->logon_parameters = user_info->logon_parameters;
mapped_user_info->flags = user_info->flags;
nt_status = auth_check_ntlm_password(mem_ctx,
auth_context,
mapped_user_info,
&server_info,
pauthoritative);
if (!NT_STATUS_IS_OK(nt_status)) {
DEBUG(5,("Checking NTLMSSP password for %s\\%s failed: "
"%s, authoritative=%u\n",
user_info->client.domain_name,
user_info->client.account_name,
nt_errstr(nt_status),
*pauthoritative));
}
username_was_mapped = mapped_user_info->was_mapped;
TALLOC_FREE(mapped_user_info);
if (!NT_STATUS_IS_OK(nt_status)) {
nt_status = do_map_to_guest_server_info(mem_ctx,
nt_status,
user_info->client.account_name,
user_info->client.domain_name,
&server_info);
if (NT_STATUS_IS_OK(nt_status)) {
*pauthoritative = 1;
*server_returned_info = talloc_steal(mem_ctx, server_info);
}
return nt_status;
}
server_info->nss_token |= username_was_mapped;
/* Clear out the session keys, and pass them to the caller.
* They will not be used in this form again - instead the
* NTLMSSP code will decide on the final correct session key,
* and supply it to create_local_token() */
if (session_key) {
DEBUG(10, ("Got NT session key of length %u\n",
(unsigned int)server_info->session_key.length));
*session_key = server_info->session_key;
talloc_steal(mem_ctx, server_info->session_key.data);
server_info->session_key = data_blob_null;
}
if (lm_session_key) {
DEBUG(10, ("Got LM session key of length %u\n",
(unsigned int)server_info->lm_session_key.length));
*lm_session_key = server_info->lm_session_key;
talloc_steal(mem_ctx, server_info->lm_session_key.data);
server_info->lm_session_key = data_blob_null;
}
*server_returned_info = talloc_steal(mem_ctx, server_info);
return nt_status;
}
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