enum winbindd_result winbindd_priv_pipe_dir(struct winbindd_cli_state *state)
{
DEBUG(3, ("[%5lu]: request location of privileged pipe\n", (unsigned long)state->pid));
state->response.extra_data = SMB_STRDUP(get_winbind_priv_pipe_dir());
if (!state->response.extra_data)
return WINBINDD_ERROR;
/* must add one to length to copy the 0 for string termination */
state->response.length += strlen((char *)state->response.extra_data) + 1;
return WINBINDD_OK;
}
enum winbindd_result winbindd_pam_auth_crap(struct winbindd_cli_state *state)
{
NTSTATUS result;
unsigned char trust_passwd[16];
time_t last_change_time;
uint32 sec_channel_type;
NET_USER_INFO_3 info3;
struct cli_state *cli = NULL;
TALLOC_CTX *mem_ctx = NULL;
char *name_user = NULL;
const char *name_domain = NULL;
const char *workstation;
struct winbindd_domain *contact_domain;
DOM_CRED ret_creds;
int attempts = 0;
BOOL retry;
DATA_BLOB lm_resp, nt_resp;
if (!state->privileged) {
char *error_string = NULL;
DEBUG(2, ("winbindd_pam_auth_crap: non-privileged access denied. !\n"));
DEBUGADD(2, ("winbindd_pam_auth_crap: Ensure permissions on %s are set correctly.\n",
get_winbind_priv_pipe_dir()));
/* send a better message than ACCESS_DENIED */
asprintf(&error_string, "winbind client not authorized to use winbindd_pam_auth_crap. Ensure permissions on %s are set correctly.",
get_winbind_priv_pipe_dir());
push_utf8_fstring(state->response.data.auth.error_string, error_string);
SAFE_FREE(error_string);
result = NT_STATUS_ACCESS_DENIED;
goto done;
}
/* Ensure null termination */
state->request.data.auth_crap.user[sizeof(state->request.data.auth_crap.user)-1]=0;
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, &name_user, state->request.data.auth_crap.user) == (size_t)-1) {
DEBUG(0, ("winbindd_pam_auth_crap: pull_utf8_talloc failed!\n"));
result = NT_STATUS_UNSUCCESSFUL;
goto done;
}
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"));
result = NT_STATUS_UNSUCCESSFUL;
goto done;
}
name_domain = dom;
} else if (lp_winbind_use_default_domain()) {
name_domain = lp_workgroup();
} else {
DEBUG(5,("no domain specified with username (%s) - failing auth\n",
name_user));
result = NT_STATUS_NO_SUCH_USER;
goto done;
}
DEBUG(3, ("[%5lu]: pam auth crap domain: %s user: %s\n", (unsigned long)state->pid,
name_domain, name_user));
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"));
result = NT_STATUS_UNSUCCESSFUL;
goto done;
}
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);
/* what domain should we contact? */
if ( IS_DC ) {
if (!(contact_domain = find_domain_from_name(name_domain))) {
DEBUG(3, ("Authentication for domain for [%s] -> [%s]\\[%s] failed as %s is not a trusted domain\n",
state->request.data.auth_crap.user, name_domain, name_user, name_domain));
result = NT_STATUS_NO_SUCH_USER;
goto done;
}
} else {
if (is_myname(name_domain)) {
DEBUG(3, ("Authentication for domain %s (local domain to this server) not supported at this stage\n", name_domain));
result = NT_STATUS_NO_SUCH_USER;
goto done;
}
if (!(contact_domain = find_our_domain())) {
DEBUG(1, ("Authenticatoin for [%s] -> [%s]\\[%s] in our domain failed - we can't find our domain!\n",
state->request.data.auth_crap.user, name_domain, name_user));
result = NT_STATUS_NO_SUCH_USER;
goto done;
}
}
if ( !get_trust_pw(contact_domain->name, trust_passwd, &last_change_time, &sec_channel_type) ) {
result = NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
goto done;
}
do {
ZERO_STRUCT(info3);
ZERO_STRUCT(ret_creds);
retry = False;
/* Don't shut this down - it belongs to the connection cache code */
result = cm_get_netlogon_cli(contact_domain, trust_passwd, sec_channel_type, False, &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,
&ret_creds,
name_user, name_domain,
workstation,
state->request.data.auth_crap.chal,
lm_resp, nt_resp,
&info3);
attempts += 1;
/* We have to try a second time as cm_get_netlogon_cli
might not yet have noticed that the DC has killed
our connection. */
if ( cli->fd == -1 ) {
retry = True;
continue;
}
/* if we get access denied, a possible cause was that we had and open
connection to the DC, but someone changed our machine account password
out from underneath us using 'net rpc changetrustpw' */
if ( NT_STATUS_V(result) == NT_STATUS_V(NT_STATUS_ACCESS_DENIED) ) {
DEBUG(3,("winbindd_pam_auth_crap: sam_logon returned ACCESS_DENIED. Maybe the trust account "
"password was changed and we didn't know it. Killing connections to domain %s\n",
contact_domain->name));
winbindd_cm_flush();
retry = True;
cli = NULL;
}
} while ( (attempts < 2) && retry );
if (cli != NULL) {
/* We might have come out of the loop above with cli == NULL,
so don't dereference that. */
clnt_deal_with_creds(cli->sess_key, &(cli->clnt_cred), &ret_creds);
}
if (NT_STATUS_IS_OK(result)) {
netsamlogon_cache_store( cli->mem_ctx, &info3 );
wcache_invalidate_samlogon(find_domain_from_name(name_domain), &info3);
if (!NT_STATUS_IS_OK(result = check_info3_in_group(mem_ctx, &info3, state->request.data.auth_crap.required_membership_sid))) {
DEBUG(3, ("User %s is not in the required group (%s), so plaintext authentication is rejected\n",
state->request.data.auth_crap.user,
state->request.data.auth_crap.required_membership_sid));
goto done;
}
if (state->request.flags & WBFLAG_PAM_INFO3_NDR) {
result = append_info3_as_ndr(mem_ctx, state, &info3);
} else if (state->request.flags & WBFLAG_PAM_UNIX_NAME) {
/* ntlm_auth should return the unix username, per
'winbind use default domain' settings and the like */
fstring username_out;
const char *nt_username, *nt_domain;
if (!(nt_username = unistr2_tdup(mem_ctx, &(info3.uni_user_name)))) {
/* If the server didn't give us one, just use the one we sent them */
nt_username = name_user;
}
if (!(nt_domain = unistr2_tdup(mem_ctx, &(info3.uni_logon_dom)))) {
/* If the server didn't give us one, just use the one we sent them */
nt_domain = name_domain;
}
fill_domain_username(username_out, nt_domain, nt_username);
DEBUG(5, ("Setting unix username to [%s]\n", username_out));
/* this interface is in UTF8 */
if (push_utf8_allocate((char **)&state->response.extra_data, username_out) == -1) {
result = NT_STATUS_NO_MEMORY;
goto done;
}
state->response.length += strlen(state->response.extra_data)+1;
}
if (state->request.flags & WBFLAG_PAM_USER_SESSION_KEY) {
memcpy(state->response.data.auth.user_session_key, info3.user_sess_key, sizeof(state->response.data.auth.user_session_key) /* 16 */);
}
if (state->request.flags & WBFLAG_PAM_LMKEY) {
memcpy(state->response.data.auth.first_8_lm_hash, info3.padding, sizeof(state->response.data.auth.first_8_lm_hash) /* 8 */);
}
}
done:
/* give us a more useful (more correct?) error code */
if ((NT_STATUS_EQUAL(result, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND) || (NT_STATUS_EQUAL(result, NT_STATUS_UNSUCCESSFUL)))) {
result = NT_STATUS_NO_LOGON_SERVERS;
}
if (state->request.flags & WBFLAG_PAM_NT_STATUS_SQUASH) {
result = nt_status_squash(result);
}
state->response.data.auth.nt_status = NT_STATUS_V(result);
push_utf8_fstring(state->response.data.auth.nt_status_string, nt_errstr(result));
/* we might have given a more useful error above */
if (!*state->response.data.auth.error_string)
push_utf8_fstring(state->response.data.auth.error_string, get_friendly_nt_error_msg(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",
name_domain,
name_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;
}
