#include "includes.h"
#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 , 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 = SMB_MALLOC(size);
if (!state->response.extra_data) {
prs_mem_free(&ps);
return NT_STATUS_NO_MEMORY;
}
memset( state->response.extra_data, '\0', size );
prs_copy_all_data_out(state->response.extra_data, &ps);
state->response.length += size;
prs_mem_free(&ps);
return NT_STATUS_OK;
}
static NTSTATUS check_info3_in_group(TALLOC_CTX *mem_ctx,
NET_USER_INFO_3 *info3,
const char *group_sid)
{
DOM_SID require_membership_of_sid;
DOM_SID *all_sids;
size_t num_all_sids = (2 + info3->num_groups2 + info3->num_other_sids);
size_t i, j = 0;
if (!group_sid || !group_sid[0]) {
return NT_STATUS_OK;
}
if (!string_to_sid(&require_membership_of_sid, group_sid)) {
DEBUG(0, ("check_info3_in_group: could not parse %s as a SID!",
group_sid));
return NT_STATUS_INVALID_PARAMETER;
}
all_sids = TALLOC_ARRAY(mem_ctx, DOM_SID, num_all_sids);
if (!all_sids)
return NT_STATUS_NO_MEMORY;
sid_copy(&all_sids[0], &(info3->dom_sid.sid));
if (!sid_append_rid(&all_sids[0], info3->user_rid)) {
DEBUG(3,("could not append user's primary RID 0x%x\n",
info3->user_rid));
return NT_STATUS_INVALID_PARAMETER;
}
j++;
sid_copy(&all_sids[1], &(info3->dom_sid.sid));
if (!sid_append_rid(&all_sids[1], info3->group_rid)) {
DEBUG(3,("could not append additional group rid 0x%x\n",
info3->group_rid));
return NT_STATUS_INVALID_PARAMETER;
}
j++;
for (i = 0; i < info3->num_groups2; i++) {
sid_copy(&all_sids[j], &(info3->dom_sid.sid));
if (!sid_append_rid(&all_sids[j], info3->gids[i].g_rid)) {
DEBUG(3,("could not append additional group rid 0x%x\n",
info3->gids[i].g_rid));
return NT_STATUS_INVALID_PARAMETER;
}
j++;
}
for (i = 0; i < info3->num_other_sids; i++) {
sid_copy(&all_sids[info3->num_groups2 + i + 2],
&info3->other_sids[i].sid);
j++;
}
for (i = 0; i < j; i++) {
fstring sid1, sid2;
DEBUG(10, ("User has SID: %s\n",
sid_to_string(sid1, &all_sids[i])));
if (sid_equal(&require_membership_of_sid, &all_sids[i])) {
DEBUG(10, ("SID %s matches %s - user permitted to authenticate!\n",
sid_to_string(sid1, &require_membership_of_sid), sid_to_string(sid2, &all_sids[i])));
return NT_STATUS_OK;
}
}
return NT_STATUS_LOGON_FAILURE;
}
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 sec_channel_type;
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;
DOM_CRED ret_creds;
int attempts = 0;
unsigned char local_lm_response[24];
unsigned char local_nt_response[24];
struct winbindd_domain *contact_domain;
BOOL retry;
state->request.data.auth.user[sizeof(state->request.data.auth.user)-1]='\0';
state->request.data.auth.pass[sizeof(state->request.data.auth.pass)-1]='\0';
DEBUG(3, ("[%5lu]: pam auth %s\n", (unsigned long)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_user(state->request.data.auth.user, name_domain, name_user);
generate_random_buffer(chal, 8);
if (lp_client_ntlmv2_auth()) {
DATA_BLOB server_chal;
DATA_BLOB names_blob;
DATA_BLOB nt_response;
DATA_BLOB lm_response;
server_chal = data_blob_talloc(mem_ctx, chal, 8);
names_blob = NTLMv2_generate_names_blob(global_myname(), lp_workgroup());
if (!SMBNTLMv2encrypt(name_user, name_domain,
state->request.data.auth.pass,
&server_chal,
&names_blob,
&lm_response, &nt_response, NULL)) {
data_blob_free(&names_blob);
data_blob_free(&server_chal);
DEBUG(0, ("winbindd_pam_auth: SMBNTLMv2encrypt() failed!\n"));
result = NT_STATUS_NO_MEMORY;
goto done;
}
data_blob_free(&names_blob);
data_blob_free(&server_chal);
lm_resp = data_blob_talloc(mem_ctx, lm_response.data, lm_response.length);
nt_resp = data_blob_talloc(mem_ctx, nt_response.data, nt_response.length);
data_blob_free(&lm_response);
data_blob_free(&nt_response);
} else {
if (lp_client_lanman_auth()
&& SMBencrypt(state->request.data.auth.pass,
chal,
local_lm_response)) {
lm_resp = data_blob_talloc(mem_ctx,
local_lm_response,
sizeof(local_lm_response));
} else {
lm_resp = data_blob(NULL, 0);
}
SMBNTencrypt(state->request.data.auth.pass,
chal,
local_nt_response);
nt_resp = data_blob_talloc(mem_ctx,
local_nt_response,
sizeof(local_nt_response));
}
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.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, ("Authentication for [%s] -> [%s]\\[%s] in our domain failed - we can't find our domain!\n",
state->request.data.auth.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;
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\n"));
goto done;
}
result = cli_netlogon_sam_network_logon(cli, mem_ctx,
&ret_creds,
name_user, name_domain,
global_myname(), chal,
lm_resp, nt_resp,
&info3);
attempts += 1;
if ( cli->fd == -1 ) {
retry = True;
continue;
}
if ( NT_STATUS_V(result) == NT_STATUS_V(NT_STATUS_ACCESS_DENIED) ) {
DEBUG(3,("winbindd_pam_auth: sam_logon returned ACCESS_DENIED. Maybe the trust account "
"password was changed and we didn't know it. Killing connections to domain %s\n",
name_domain));
winbindd_cm_flush();
retry = True;
cli = NULL;
}
} while ( (attempts < 2) && retry );
if (cli != NULL) {
clnt_deal_with_creds(cli->sess_key, &(cli->clnt_cred), &ret_creds);
}
if (NT_STATUS_IS_OK(result)) {
netsamlogon_cache_store( cli->mem_ctx, name_user, &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.require_membership_of_sid))) {
DEBUG(3, ("User %s is not in the required group (%s), so plaintext authentication is rejected\n",
state->request.data.auth.user,
state->request.data.auth.require_membership_of_sid));
}
}
done:
if ((NT_STATUS_EQUAL(result, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND) || (NT_STATUS_EQUAL(result, NT_STATUS_UNSUCCESSFUL)))) {
result = NT_STATUS_NO_LOGON_SERVERS;
}
state->response.data.auth.nt_status = NT_STATUS_V(result);
fstrcpy(state->response.data.auth.nt_status_string, nt_errstr(result));
if (!*state->response.data.auth.error_string)
fstrcpy(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, ("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 ( NT_STATUS_IS_OK(result) &&
(state->request.flags & WBFLAG_PAM_AFS_TOKEN) ) {
char *afsname = SMB_STRDUP(lp_afs_username_map());
char *cell;
if (afsname == NULL) goto no_token;
afsname = realloc_string_sub(afsname, "%D", name_domain);
afsname = realloc_string_sub(afsname, "%u", name_user);
afsname = realloc_string_sub(afsname, "%U", name_user);
if (afsname == NULL) goto no_token;
strlower_m(afsname);
cell = strchr(afsname, '@');
if (cell == NULL) goto no_token;
*cell = '\0';
cell += 1;
state->response.extra_data =
afs_createtoken_str(afsname, cell);
if (state->response.extra_data != NULL)
state->response.length +=
strlen(state->response.extra_data)+1;
no_token:
SAFE_FREE(afsname);
}
if (mem_ctx)
talloc_destroy(mem_ctx);
return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
}
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;
const 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()));
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());
fstrcpy(state->response.data.auth.error_string, error_string);
SAFE_FREE(error_string);
result = NT_STATUS_ACCESS_DENIED;
goto done;
}
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 %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;
}
name_user = state->request.data.auth_crap.user;
if (*state->request.data.auth_crap.domain) {
name_domain = state->request.data.auth_crap.domain;
} 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) {
workstation = state->request.data.auth_crap.workstation;
} 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);
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;
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;
if ( cli->fd == -1 ) {
retry = True;
continue;
}
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) {
clnt_deal_with_creds(cli->sess_key, &(cli->clnt_cred), &ret_creds);
}
if (NT_STATUS_IS_OK(result)) {
netsamlogon_cache_store( cli->mem_ctx, name_user, &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.require_membership_of_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.require_membership_of_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) {
fstring username_out;
const char *nt_username, *nt_domain;
if (!(nt_username = unistr2_tdup(mem_ctx, &(info3.uni_user_name)))) {
nt_username = name_user;
}
if (!(nt_domain = unistr2_tdup(mem_ctx, &(info3.uni_logon_dom)))) {
nt_domain = name_domain;
}
fill_domain_username(username_out, nt_domain, nt_username);
DEBUG(5, ("Setting unix username to [%s]\n", username_out));
state->response.extra_data = SMB_STRDUP(username_out);
if (!state->response.extra_data) {
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) );
}
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) );
}
}
done:
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);
fstrcpy(state->response.data.auth.nt_status_string, nt_errstr(result));
if (!*state->response.data.auth.error_string)
fstrcpy(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;
}
enum winbindd_result winbindd_pam_chauthtok(struct winbindd_cli_state *state)
{
NTSTATUS result;
char *oldpass, *newpass;
fstring domain, user;
CLI_POLICY_HND *hnd;
TALLOC_CTX *mem_ctx;
struct winbindd_domain *contact_domain;
DEBUG(3, ("[%5lu]: pam chauthtok %s\n", (unsigned long)state->pid,
state->request.data.chauthtok.user));
if (!(mem_ctx = talloc_init("winbind password change for %s",
state->request.data.chauthtok.user))) {
DEBUG(0, ("winbindd_pam_auth_crap: could not talloc_init()!\n"));
result = NT_STATUS_NO_MEMORY;
goto done;
}
if (state == NULL)
return WINBINDD_ERROR;
parse_domain_user(state->request.data.chauthtok.user, domain, user);
if (!(contact_domain = find_domain_from_name(domain))) {
DEBUG(3, ("Cannot change password for [%s] -> [%s]\\[%s] as %s is not a trusted domain\n",
state->request.data.chauthtok.user, domain, user, domain));
result = NT_STATUS_NO_SUCH_USER;
goto done;
}
oldpass = state->request.data.chauthtok.oldpass;
newpass = state->request.data.chauthtok.newpass;
if (!NT_STATUS_IS_OK(result = cm_get_sam_handle(contact_domain, &hnd)) ) {
DEBUG(1, ("could not get SAM handle on DC for %s\n", domain));
goto done;
}
result = cli_samr_chgpasswd_user(hnd->cli, mem_ctx, user, newpass, oldpass);
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));
if (mem_ctx)
talloc_destroy(mem_ctx);
return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
}