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/*
Unix SMB/Netbios implementation.
Version 3.0
Winbind daemon - pam auth funcions
Copyright (C) Andrew Tridgell 2000
Copyright (C) Tim Potter 2001
Copyright (C) Andrew Bartlett 2001
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 "winbindd.h"
/* Return a password structure from a username. */
enum winbindd_result winbindd_pam_auth(struct winbindd_cli_state *state)
{
NTSTATUS result;
fstring name_domain, name_user;
int passlen;
unsigned char trust_passwd[16];
time_t last_change_time;
uint32 smb_uid_low;
NET_USER_INFO_3 info3;
struct cli_state *cli = NULL;
uchar chal[8];
TALLOC_CTX *mem_ctx;
DATA_BLOB lm_resp;
DATA_BLOB nt_resp;
extern pstring global_myname;
DEBUG(3, ("[%5d]: pam auth %s\n", state->pid,
state->request.data.auth.user));
if (!(mem_ctx = talloc_init_named("winbind pam auth for %s", state->request.data.auth.user))) {
DEBUG(0, ("winbindd_pam_auth: could not talloc_init()!\n"));
return WINBINDD_ERROR;
}
/* Parse domain and username */
if (!parse_domain_user(state->request.data.auth.user, name_domain,
name_user)) {
DEBUG(5,("no domain seperator (%s) in username (%s) - failing auth\n", lp_winbind_separator(), state->request.data.auth.user));
talloc_destroy(mem_ctx);
return WINBINDD_ERROR;
}
passlen = strlen(state->request.data.auth.pass);
if (!*state->request.data.auth.pass) {
return WINBINDD_ERROR;
talloc_destroy(mem_ctx);
} else {
unsigned char local_lm_response[24];
unsigned char local_nt_response[24];
generate_random_buffer(chal, 8, False);
SMBencrypt( (const uchar *)state->request.data.auth.pass, chal, local_lm_response);
SMBNTencrypt((const uchar *)state->request.data.auth.pass, chal, local_nt_response);
lm_resp = data_blob_talloc(mem_ctx, local_lm_response, sizeof(local_lm_response));
nt_resp = data_blob_talloc(mem_ctx, local_nt_response, sizeof(local_nt_response));
}
/*
* Get the machine account password for our primary domain
*/
if (!secrets_fetch_trust_account_password(
lp_workgroup(), trust_passwd, &last_change_time)) {
DEBUG(0, ("winbindd_pam_auth: could not fetch trust account "
"password for domain %s\n", lp_workgroup()));
talloc_destroy(mem_ctx);
return WINBINDD_ERROR;
}
/* We really don't care what LUID we give the user. */
generate_random_buffer( (unsigned char *)&smb_uid_low, 4, False);
ZERO_STRUCT(info3);
result = cm_get_netlogon_cli(lp_workgroup(), trust_passwd, &cli);
if (!NT_STATUS_IS_OK(result)) {
DEBUG(3, ("could not open handle to NETLOGON pipe\n"));
goto done;
}
result = cli_netlogon_sam_network_logon(cli, mem_ctx,
name_user, name_domain,
global_myname, chal,
lm_resp, nt_resp,
&info3);
uni_group_cache_store_netlogon(mem_ctx, &info3);
done:
if (cli)
cli_shutdown(cli);
talloc_destroy(mem_ctx);
return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
}
/* Challenge Response Authentication Protocol */
enum winbindd_result winbindd_pam_auth_crap(struct winbindd_cli_state *state)
{
NTSTATUS result;
unsigned char trust_passwd[16];
time_t last_change_time;
NET_USER_INFO_3 info3;
struct cli_state *cli = NULL;
TALLOC_CTX *mem_ctx;
const char *domain = NULL;
DATA_BLOB lm_resp, nt_resp;
extern pstring global_myname;
DEBUG(3, ("[%5d]: pam auth crap domain: %s user: %s\n", state->pid,
state->request.data.auth_crap.user, state->request.data.auth_crap.user));
if (!(mem_ctx = talloc_init_named("winbind pam auth crap for %s", state->request.data.auth.user))) {
DEBUG(0, ("winbindd_pam_auth_crap: could not talloc_init()!\n"));
return WINBINDD_ERROR;
}
if (*state->request.data.auth_crap.domain) {
domain = talloc_strdup(mem_ctx, state->request.data.auth_crap.domain);
} else if (lp_winbind_use_default_domain()) {
domain = talloc_strdup(mem_ctx, lp_workgroup());
} else {
DEBUG(5,("no domain specified with username (%s) - failing auth\n", state->request.data.auth.user));
talloc_destroy(mem_ctx);
return WINBINDD_ERROR;
}
if (!domain) {
DEBUG(0,("winbindd_pam_auth_crap: talloc_strdup failed!\n"));
talloc_destroy(mem_ctx);
return WINBINDD_ERROR;
}
lm_resp = data_blob_talloc(mem_ctx, state->request.data.auth_crap.lm_resp, state->request.data.auth_crap.lm_resp_len);
nt_resp = data_blob_talloc(mem_ctx, state->request.data.auth_crap.nt_resp, state->request.data.auth_crap.nt_resp_len);
/*
* Get the machine account password for our primary domain
*/
if (!secrets_fetch_trust_account_password(
lp_workgroup(), trust_passwd, &last_change_time)) {
DEBUG(0, ("winbindd_pam_auth: could not fetch trust account "
"password for domain %s\n", lp_workgroup()));
talloc_destroy(mem_ctx);
return WINBINDD_ERROR;
}
ZERO_STRUCT(info3);
result = cm_get_netlogon_cli(lp_workgroup(), trust_passwd, &cli);
if (!NT_STATUS_IS_OK(result)) {
DEBUG(3, ("could not open handle to NETLOGON pipe\n"));
goto done;
}
result = cli_netlogon_sam_network_logon(cli, mem_ctx,
state->request.data.auth_crap.user, domain,
global_myname, state->request.data.auth_crap.chal,
lm_resp, nt_resp,
&info3);
uni_group_cache_store_netlogon(mem_ctx, &info3);
done:
talloc_destroy(mem_ctx);
if (cli)
cli_shutdown(cli);
return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
}
/* Change a user password */
enum winbindd_result winbindd_pam_chauthtok(struct winbindd_cli_state *state)
{
char *oldpass, *newpass;
fstring domain, user;
uchar nt_oldhash[16];
uchar lm_oldhash[16];
CLI_POLICY_HND *hnd;
DEBUG(3, ("[%5d]: pam chauthtok %s\n", state->pid,
state->request.data.chauthtok.user));
/* Setup crap */
if (state == NULL)
return WINBINDD_ERROR;
if (!parse_domain_user(state->request.data.chauthtok.user, domain,
user))
return WINBINDD_ERROR;
/* Change password */
oldpass = state->request.data.chauthtok.oldpass;
newpass = state->request.data.chauthtok.newpass;
/* Get sam handle */
if (!(hnd = cm_get_sam_handle(domain)))
return WINBINDD_ERROR;
if (!cli_oem_change_password(hnd->cli, user, newpass, oldpass)) {
DEBUG(0, ("password change failed for user %s/%s\n", domain,
user));
return WINBINDD_ERROR;
}
return WINBINDD_OK;
}
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