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/*
Unix SMB/CIFS implementation.
Authenticate a user to a domain controller
Copyright (C) Andrew Bartlett <abartlet@samba.org> 2004-2005
Copyright (C) Andrew Tridgell 2004
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 2 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
#include "librpc/gen_ndr/ndr_netlogon.h"
#include "include/secrets.h"
#include "lib/ldb/include/ldb.h"
#include "auth/auth.h"
/* Authenticate a user with a challenge/response */
static NTSTATUS domain_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 status;
struct dcerpc_pipe *p;
struct dcerpc_binding *b;
struct netr_LogonSamLogon r;
struct netr_Authenticator auth, auth2;
struct netr_NetworkInfo ninfo;
const char *machine_account;
const char *password;
struct ldb_context *ldb;
int ldb_ret;
struct ldb_message **msgs;
const char *base_dn = SECRETS_PRIMARY_DOMAIN_DN;
const char *attrs[] = {
"secret",
"samAccountName",
NULL
};
struct creds_CredentialState *creds;
struct cli_credentials *credentials;
const char **bindings = lp_passwordserver();
const char *binding;
if (bindings && bindings[0]) {
binding = bindings[0];
}
credentials = cli_credentials_init(mem_ctx);
/* Fetch join password */
/* Local secrets are stored in secrets.ldb */
ldb = secrets_db_connect(mem_ctx);
if (!ldb) {
return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
}
/* search for the secret record */
ldb_ret = samdb_search(ldb,
mem_ctx, base_dn, &msgs, attrs,
"(&(flatname=%s)(objectclass=primaryDomain))",
lp_workgroup());
if (ldb_ret == 0) {
DEBUG(1, ("Could not find join record to domain: %s\n",
lp_workgroup()));
return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
} else if (ldb_ret != 1) {
DEBUG(1, ("Found %d records matching flatname=%s under DN %s\n", ldb_ret,
lp_workgroup(), base_dn));
return NT_STATUS_INTERNAL_ERROR;
}
password = ldb_msg_find_string(msgs[0], "secret", NULL);
if (!password) {
DEBUG(1, ("Could not find 'secret' in join record to domain: %s\n",
lp_workgroup()));
return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
}
machine_account = ldb_msg_find_string(msgs[0], "samAccountName", NULL);
if (!machine_account) {
DEBUG(1, ("Could not find 'samAccountName' in join record to domain: %s\n",
lp_workgroup()));
return NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
}
cli_credentials_set_domain(credentials, lp_workgroup(), CRED_SPECIFIED);
cli_credentials_set_username(credentials, machine_account, CRED_SPECIFIED);
cli_credentials_set_password(credentials, password, CRED_SPECIFIED);
cli_credentials_guess(credentials);
/* Connect to DC (take a binding string for now) */
status = dcerpc_parse_binding(mem_ctx, binding, &b);
if (!NT_STATUS_IS_OK(status)) {
printf("Bad binding string %s\n", binding);
return NT_STATUS_INVALID_PARAMETER;
}
/* We like schannel */
b->flags &= ~DCERPC_AUTH_OPTIONS;
b->flags |= DCERPC_SCHANNEL_WORKSTATION | DCERPC_SEAL | DCERPC_SCHANNEL_128;
/* Setup schannel */
status = dcerpc_pipe_connect_b(mem_ctx, &p, b,
DCERPC_NETLOGON_UUID,
DCERPC_NETLOGON_VERSION,
credentials);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
/* call domain logon */
status = dcerpc_schannel_creds(p->conn->security_state.generic_state, mem_ctx, &creds);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
ninfo.identity_info.domain_name.string = user_info->domain_name;
ninfo.identity_info.parameter_control = 0;
ninfo.identity_info.logon_id_low = 0;
ninfo.identity_info.logon_id_high = 0;
ninfo.identity_info.account_name.string = user_info->account_name;
ninfo.identity_info.workstation.string = user_info->workstation_name;
memcpy(ninfo.challenge, ctx->auth_ctx->challenge.data.data, sizeof(ninfo.challenge));
ninfo.nt.length = user_info->nt_resp.length;
ninfo.nt.data = user_info->nt_resp.data;
ninfo.lm.length = user_info->lm_resp.length;
ninfo.lm.data = user_info->lm_resp.data;
r.in.server_name = talloc_asprintf(mem_ctx, "\\\\%s", dcerpc_server_name(p));
r.in.workstation = creds->computer_name;
r.in.credential = &auth;
r.in.return_authenticator = &auth2;
r.in.logon_level = 2;
r.in.logon.network = &ninfo;
r.in.validation_level = 3;
ZERO_STRUCT(auth2);
creds_client_authenticator(creds, &auth);
status = dcerpc_netr_LogonSamLogon(p, mem_ctx, &r);
if (!creds_client_check(creds, &r.out.return_authenticator->cred)) {
DEBUG(1, ("Credential chaining failed\n"));
return NT_STATUS_ACCESS_DENIED;
}
/* make server info */
if (!NT_STATUS_IS_OK(status)) {
return status;
}
status = make_server_info_netlogon_validation(mem_ctx,
user_info->account_name,
r.in.validation_level, &r.out.validation,
server_info);
return status;
}
static const struct auth_operations domain_ops = {
.name = "domain",
.get_challenge = auth_get_challenge_not_implemented,
.check_password = domain_check_password
};
NTSTATUS auth_domain_init(void)
{
NTSTATUS ret;
ret = auth_register(&domain_ops);
if (!NT_STATUS_IS_OK(ret)) {
DEBUG(0,("Failed to register 'domain' auth backend!\n"));
return ret;
}
return ret;
}
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