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/*
Unix SMB/CIFS implementation.
Winbind daemon - pam auth funcions
Copyright (C) Andrew Tridgell 2000
Copyright (C) Tim Potter 2001
Copyright (C) Andrew Bartlett 2001-2002
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"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_WINBIND
static NTSTATUS append_info3_as_ndr(TALLOC_CTX *mem_ctx,
struct winbindd_cli_state *state,
NET_USER_INFO_3 *info3)
{
prs_struct ps;
uint32 size;
if (!prs_init(&ps, 256 /* Random, non-zero number */, mem_ctx, MARSHALL)) {
return NT_STATUS_NO_MEMORY;
}
if (!net_io_user_info3("", info3, &ps, 1, 3)) {
prs_mem_free(&ps);
return NT_STATUS_UNSUCCESSFUL;
}
size = prs_data_size(&ps);
state->response.extra_data = memdup(prs_data_p(&ps), size);
if (!state->response.extra_data) {
prs_mem_free(&ps);
return NT_STATUS_NO_MEMORY;
}
state->response.length += size;
prs_mem_free(&ps);
return NT_STATUS_OK;
}
/* 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;
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 = NULL;
DATA_BLOB lm_resp;
DATA_BLOB nt_resp;
/* Ensure null termination */
state->request.data.auth.user[sizeof(state->request.data.auth.user)-1]='\0';
/* Ensure null termination */
state->request.data.auth.pass[sizeof(state->request.data.auth.pass)-1]='\0';
DEBUG(3, ("[%5d]: pam auth %s\n", state->pid,
state->request.data.auth.user));
if (!(mem_ctx = talloc_init("winbind pam auth for %s", state->request.data.auth.user))) {
DEBUG(0, ("winbindd_pam_auth: could not talloc_init()!\n"));
result = NT_STATUS_NO_MEMORY;
goto done;
}
/* Parse domain and username */
if (!parse_domain_user(state->request.data.auth.user, name_domain,
name_user)) {
DEBUG(5,("no domain separator (%s) in username (%s) - failing auth\n", lp_winbind_separator(), state->request.data.auth.user));
result = NT_STATUS_INVALID_PARAMETER;
goto done;
}
{
unsigned char local_lm_response[24];
unsigned char local_nt_response[24];
generate_random_buffer(chal, 8, False);
SMBencrypt(state->request.data.auth.pass, chal, local_lm_response);
SMBNTencrypt(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()));
result = NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
goto done;
}
/* We really don't care what LUID we give the user. */
generate_random_buffer( (unsigned char *)&smb_uid_low, 4, False);
ZERO_STRUCT(info3);
/* Don't shut this down - it belongs to the connection cache code */
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:
state->response.data.auth.nt_status = NT_STATUS_V(result);
fstrcpy(state->response.data.auth.nt_status_string, nt_errstr(result));
fstrcpy(state->response.data.auth.error_string, nt_errstr(result));
state->response.data.auth.pam_error = nt_status_to_pam(result);
DEBUG(NT_STATUS_IS_OK(result) ? 5 : 2, ("Plain-text authentication for user %s returned %s (PAM: %d)\n",
state->request.data.auth.user,
state->response.data.auth.nt_status_string,
state->response.data.auth.pam_error));
if (mem_ctx)
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 = NULL;
char *user = NULL;
const char *domain = NULL;
const char *contact_domain;
const char *workstation;
DATA_BLOB lm_resp, nt_resp;
/* Ensure null termination */
state->request.data.auth_crap.user[sizeof(state->request.data.auth_crap.user)-1]='\0';
/* Ensure null termination */
state->request.data.auth_crap.domain[sizeof(state->request.data.auth_crap.domain)-1]='\0';
if (!(mem_ctx = talloc_init("winbind pam auth crap for (utf8) %s", state->request.data.auth_crap.user))) {
DEBUG(0, ("winbindd_pam_auth_crap: could not talloc_init()!\n"));
result = NT_STATUS_NO_MEMORY;
goto done;
}
if (pull_utf8_talloc(mem_ctx, &user, state->request.data.auth_crap.user) == (size_t)-1) {
DEBUG(0, ("winbindd_pam_auth_crap: pull_utf8_talloc failed!\n"));
}
if (*state->request.data.auth_crap.domain) {
char *dom = NULL;
if (pull_utf8_talloc(mem_ctx, &dom, state->request.data.auth_crap.domain) (size_t)-1) {
DEBUG(0, ("winbindd_pam_auth_crap: pull_utf8_talloc failed!\n"));
}
domain = dom;
} else if (lp_winbind_use_default_domain()) {
domain = lp_workgroup();
} else {
DEBUG(5,("no domain specified with username (%s) - failing auth\n",
user));
result = NT_STATUS_INVALID_PARAMETER;
goto done;
}
DEBUG(3, ("[%5d]: pam auth crap domain: %s user: %s\n", state->pid,
domain, user));
if (lp_allow_trusted_domains() && (state->request.data.auth_crap.flags & WINBIND_PAM_CONTACT_TRUSTDOM)) {
contact_domain = domain;
} else {
contact_domain = lp_workgroup();
}
if (*state->request.data.auth_crap.workstation) {
char *wrk = NULL;
if (pull_utf8_talloc(mem_ctx, &wrk, state->request.data.auth_crap.workstation) == (size_t)-1) {
DEBUG(0, ("winbindd_pam_auth_crap: pull_utf8_talloc failed!\n"));
}
workstation = wrk;
} else {
workstation = global_myname();
}
if (state->request.data.auth_crap.lm_resp_len > sizeof(state->request.data.auth_crap.lm_resp)
|| state->request.data.auth_crap.nt_resp_len > sizeof(state->request.data.auth_crap.nt_resp)) {
DEBUG(0, ("winbindd_pam_auth_crap: invalid password length %u/%u\n",
state->request.data.auth_crap.lm_resp_len,
state->request.data.auth_crap.nt_resp_len));
result = NT_STATUS_INVALID_PARAMETER;
goto done;
}
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 the domain to contact.
* This is either our own domain for a workstation, or possibly
* any domain for a PDC with trusted domains.
*/
if (!secrets_fetch_trust_account_password (
contact_domain, trust_passwd, &last_change_time)) {
DEBUG(0, ("winbindd_pam_auth: could not fetch trust account "
"password for domain %s\n", contact_domain));
result = NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
goto done;
}
ZERO_STRUCT(info3);
/* Don't shut this down - it belongs to the connection cache code */
result = cm_get_netlogon_cli(contact_domain, trust_passwd, &cli);
if (!NT_STATUS_IS_OK(result)) {
DEBUG(3, ("could not open handle to NETLOGON pipe (error: %s)\n", nt_errstr(result)));
goto done;
}
result = cli_netlogon_sam_network_logon(cli, mem_ctx,
user, domain,
workstation, state->request.data.auth_crap.chal,
lm_resp, nt_resp,
&info3);
if (NT_STATUS_IS_OK(result)) {
uni_group_cache_store_netlogon(mem_ctx, &info3);
if (state->request.data.auth_crap.flags & WINBIND_PAM_INFO3_NDR) {
result = append_info3_as_ndr(mem_ctx, state, &info3);
}
#if 0
/* we don't currently do this stuff right */
if (state->request.data.auth_crap.flags & WINBIND_PAM_NTKEY) {
SMB_ASSERT(sizeof(state->response.data.auth.nt_session_key) == sizeof(info3.user_sess_key));
memcpy(state->response.data.auth.nt_session_key, info3.user_sess_key, sizeof(state->response.data.auth.nt_session_key) /* 16 */);
}
if (state->request.data.auth_crap.flags & WINBIND_PAM_LMKEY) {
SMB_ASSERT(sizeof(state->response.data.auth.nt_session_key) <= sizeof(info3.user_sess_key));
memcpy(state->response.data.auth.first_8_lm_hash, info3.padding, sizeof(state->response.data.auth.nt_session_key) /* 16 */);
}
#endif
}
done:
state->response.data.auth.nt_status = NT_STATUS_V(result);
push_utf8_fstring(state->response.data.auth.nt_status_string, nt_errstr(result));
push_utf8_fstring(state->response.data.auth.error_string, nt_errstr(result));
state->response.data.auth.pam_error = nt_status_to_pam(result);
DEBUG(NT_STATUS_IS_OK(result) ? 5 : 2,
("NTLM CRAP authentication for user [%s]\\[%s] returned %s (PAM: %d)\n",
domain,
user,
state->response.data.auth.nt_status_string,
state->response.data.auth.pam_error));
if (mem_ctx)
talloc_destroy(mem_ctx);
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)
{
NTSTATUS result;
char *oldpass, *newpass;
fstring domain, user;
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)) {
result = NT_STATUS_INVALID_PARAMETER;
goto done;
}
/* Change password */
oldpass = state->request.data.chauthtok.oldpass;
newpass = state->request.data.chauthtok.newpass;
/* Get sam handle */
if (!(hnd = cm_get_sam_handle(domain))) {
DEBUG(1, ("could not get SAM handle on DC for %s\n", domain));
result = NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
goto done;
}
if (!cli_oem_change_password(hnd->cli, user, newpass, oldpass)) {
DEBUG(1, ("password change failed for user %s/%s\n", domain,
user));
result = NT_STATUS_WRONG_PASSWORD;
} else {
result = NT_STATUS_OK;
}
done:
state->response.data.auth.nt_status = NT_STATUS_V(result);
fstrcpy(state->response.data.auth.nt_status_string, nt_errstr(result));
fstrcpy(state->response.data.auth.error_string, nt_errstr(result));
state->response.data.auth.pam_error = nt_status_to_pam(result);
DEBUG(NT_STATUS_IS_OK(result) ? 5 : 2,
("Password change for user [%s]\\[%s] returned %s (PAM: %d)\n",
domain,
user,
state->response.data.auth.nt_status_string,
state->response.data.auth.pam_error));
return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
}
|