static NTSTATUS make_new_session_info_guest(struct auth_session_info **session_info, struct auth_serversupplied_info **server_info)
{
static const char zeros[16] = {0};
const char *guest_account = lp_guest_account();
const char *domain = lp_netbios_name();
struct netr_SamInfo3 info3;
TALLOC_CTX *tmp_ctx;
NTSTATUS status;
tmp_ctx = talloc_stackframe();
if (tmp_ctx == NULL) {
return NT_STATUS_NO_MEMORY;
}
ZERO_STRUCT(info3);
status = get_guest_info3(tmp_ctx, &info3);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("get_guest_info3 failed with %s\n",
nt_errstr(status)));
goto done;
}
status = make_server_info_info3(tmp_ctx,
guest_account,
domain,
server_info,
&info3);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("make_server_info_info3 failed with %s\n",
nt_errstr(status)));
goto done;
}
(*server_info)->guest = true;
/* This should not be done here (we should produce a server
* info, and later construct a session info from it), but for
* now this does not change the previous behavior */
status = create_local_token(tmp_ctx, *server_info, NULL,
(*server_info)->info3->base.account_name.string,
session_info);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("create_local_token failed: %s\n",
nt_errstr(status)));
goto done;
}
talloc_steal(NULL, *session_info);
talloc_steal(NULL, *server_info);
/* annoying, but the Guest really does have a session key, and it is
all zeros! */
(*session_info)->session_key = data_blob(zeros, sizeof(zeros));
status = NT_STATUS_OK;
done:
TALLOC_FREE(tmp_ctx);
return status;
}
static NTSTATUS get_guest_info3(TALLOC_CTX *mem_ctx,
struct netr_SamInfo3 *info3)
{
const char *guest_account = lp_guest_account();
struct dom_sid domain_sid;
struct passwd *pwd;
const char *tmp;
pwd = Get_Pwnam_alloc(mem_ctx, guest_account);
if (pwd == NULL) {
DEBUG(0,("SamInfo3_for_guest: Unable to locate guest "
"account [%s]!\n", guest_account));
return NT_STATUS_NO_SUCH_USER;
}
/* Set account name */
tmp = talloc_strdup(mem_ctx, pwd->pw_name);
if (tmp == NULL) {
return NT_STATUS_NO_MEMORY;
}
init_lsa_String(&info3->base.account_name, tmp);
/* Set domain name */
tmp = talloc_strdup(mem_ctx, get_global_sam_name());
if (tmp == NULL) {
return NT_STATUS_NO_MEMORY;
}
init_lsa_StringLarge(&info3->base.logon_domain, tmp);
/* Domain sid */
sid_copy(&domain_sid, get_global_sam_sid());
info3->base.domain_sid = dom_sid_dup(mem_ctx, &domain_sid);
if (info3->base.domain_sid == NULL) {
return NT_STATUS_NO_MEMORY;
}
/* Guest rid */
info3->base.rid = DOMAIN_RID_GUEST;
/* Primary gid */
info3->base.primary_gid = DOMAIN_RID_GUESTS;
/* Set as guest */
info3->base.user_flags = NETLOGON_GUEST;
TALLOC_FREE(pwd);
return NT_STATUS_OK;
}
NTSTATUS get_user_from_kerberos_info(TALLOC_CTX *mem_ctx,
const char *cli_name,
const char *princ_name,
struct PAC_LOGON_INFO *logon_info,
bool *is_mapped,
bool *mapped_to_guest,
char **ntuser,
char **ntdomain,
char **username,
struct passwd **_pw)
{
NTSTATUS status;
char *domain = NULL;
char *realm = NULL;
char *user = NULL;
char *p;
char *fuser = NULL;
char *unixuser = NULL;
struct passwd *pw = NULL;
DEBUG(3, ("Kerberos ticket principal name is [%s]\n", princ_name));
p = strchr_m(princ_name, '@');
if (!p) {
DEBUG(3, ("[%s] Doesn't look like a valid principal\n",
princ_name));
return NT_STATUS_LOGON_FAILURE;
}
user = talloc_strndup(mem_ctx, princ_name, p - princ_name);
if (!user) {
return NT_STATUS_NO_MEMORY;
}
realm = talloc_strdup(talloc_tos(), p + 1);
if (!realm) {
return NT_STATUS_NO_MEMORY;
}
if (!strequal(realm, lp_realm())) {
DEBUG(3, ("Ticket for foreign realm %s@%s\n", user, realm));
if (!lp_allow_trusted_domains()) {
return NT_STATUS_LOGON_FAILURE;
}
}
if (logon_info && logon_info->info3.base.logon_domain.string) {
domain = talloc_strdup(mem_ctx,
logon_info->info3.base.logon_domain.string);
if (!domain) {
return NT_STATUS_NO_MEMORY;
}
DEBUG(10, ("Domain is [%s] (using PAC)\n", domain));
} else {
/* If we have winbind running, we can (and must) shorten the
username by using the short netbios name. Otherwise we will
have inconsistent user names. With Kerberos, we get the
fully qualified realm, with ntlmssp we get the short
name. And even w2k3 does use ntlmssp if you for example
connect to an ip address. */
wbcErr wbc_status;
struct wbcDomainInfo *info = NULL;
DEBUG(10, ("Mapping [%s] to short name using winbindd\n",
realm));
wbc_status = wbcDomainInfo(realm, &info);
if (WBC_ERROR_IS_OK(wbc_status)) {
domain = talloc_strdup(mem_ctx,
info->short_name);
wbcFreeMemory(info);
} else {
DEBUG(3, ("Could not find short name: %s\n",
wbcErrorString(wbc_status)));
domain = talloc_strdup(mem_ctx, realm);
}
if (!domain) {
return NT_STATUS_NO_MEMORY;
}
DEBUG(10, ("Domain is [%s] (using Winbind)\n", domain));
}
fuser = talloc_asprintf(mem_ctx,
"%s%c%s",
domain,
*lp_winbind_separator(),
user);
if (!fuser) {
return NT_STATUS_NO_MEMORY;
}
*is_mapped = map_username(mem_ctx, fuser, &fuser);
if (!fuser) {
return NT_STATUS_NO_MEMORY;
}
*mapped_to_guest = false;
pw = smb_getpwnam(mem_ctx, fuser, &unixuser, true);
if (pw) {
if (!unixuser) {
return NT_STATUS_NO_MEMORY;
}
/* if a real user check pam account restrictions */
/* only really perfomed if "obey pam restriction" is true */
/* do this before an eventual mapping to guest occurs */
status = smb_pam_accountcheck(pw->pw_name, cli_name);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(1, ("PAM account restrictions prevent user "
"[%s] login\n", unixuser));
return status;
}
}
if (!pw) {
/* this was originally the behavior of Samba 2.2, if a user
did not have a local uid but has been authenticated, then
map them to a guest account */
if (lp_map_to_guest() == MAP_TO_GUEST_ON_BAD_UID) {
*mapped_to_guest = true;
fuser = talloc_strdup(mem_ctx, lp_guest_account());
if (!fuser) {
return NT_STATUS_NO_MEMORY;
}
pw = smb_getpwnam(mem_ctx, fuser, &unixuser, true);
}
/* extra sanity check that the guest account is valid */
if (!pw) {
DEBUG(1, ("Username %s is invalid on this system\n",
fuser));
return NT_STATUS_LOGON_FAILURE;
}
}
if (!unixuser) {
return NT_STATUS_NO_MEMORY;
}
*username = talloc_strdup(mem_ctx, unixuser);
if (!*username) {
return NT_STATUS_NO_MEMORY;
}
*ntuser = user;
*ntdomain = domain;
*_pw = pw;
return NT_STATUS_OK;
}
