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samba-mirror/source3/auth/server_info.c
Volker Lendecke 097be4b101 s3: Make proper use of sid_check_is_in_xx routines
Autobuild-User: Volker Lendecke <vlendec@samba.org>
Autobuild-Date: Fri Nov  5 15:35:59 UTC 2010 on sn-devel-104
2010-11-05 15:35:59 +00:00

706 lines
20 KiB
C

/*
Unix SMB/CIFS implementation.
Authentication utility functions
Copyright (C) Volker Lendecke 2010
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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "../lib/crypto/arcfour.h"
#include "../librpc/gen_ndr/netlogon.h"
#include "../libcli/security/security.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_AUTH
/* FIXME: do we really still need this ? */
static int server_info_dtor(struct auth_serversupplied_info *server_info)
{
TALLOC_FREE(server_info->info3);
ZERO_STRUCTP(server_info);
return 0;
}
/***************************************************************************
Make a server_info struct. Free with TALLOC_FREE().
***************************************************************************/
struct auth_serversupplied_info *make_server_info(TALLOC_CTX *mem_ctx)
{
struct auth_serversupplied_info *result;
result = TALLOC_ZERO_P(mem_ctx, struct auth_serversupplied_info);
if (result == NULL) {
DEBUG(0, ("talloc failed\n"));
return NULL;
}
talloc_set_destructor(result, server_info_dtor);
/* Initialise the uid and gid values to something non-zero
which may save us from giving away root access if there
is a bug in allocating these fields. */
result->utok.uid = -1;
result->utok.gid = -1;
return result;
}
/****************************************************************************
inits a netr_SamInfo2 structure from an auth_serversupplied_info. sam2 must
already be initialized and is used as the talloc parent for its members.
*****************************************************************************/
NTSTATUS serverinfo_to_SamInfo2(struct auth_serversupplied_info *server_info,
uint8_t *pipe_session_key,
size_t pipe_session_key_len,
struct netr_SamInfo2 *sam2)
{
struct netr_SamInfo3 *info3;
info3 = copy_netr_SamInfo3(sam2, server_info->info3);
if (!info3) {
return NT_STATUS_NO_MEMORY;
}
if (server_info->user_session_key.length) {
memcpy(info3->base.key.key,
server_info->user_session_key.data,
MIN(sizeof(info3->base.key.key),
server_info->user_session_key.length));
if (pipe_session_key) {
arcfour_crypt(info3->base.key.key,
pipe_session_key, 16);
}
}
if (server_info->lm_session_key.length) {
memcpy(info3->base.LMSessKey.key,
server_info->lm_session_key.data,
MIN(sizeof(info3->base.LMSessKey.key),
server_info->lm_session_key.length));
if (pipe_session_key) {
arcfour_crypt(info3->base.LMSessKey.key,
pipe_session_key, 8);
}
}
sam2->base = info3->base;
return NT_STATUS_OK;
}
/****************************************************************************
inits a netr_SamInfo3 structure from an auth_serversupplied_info. sam3 must
already be initialized and is used as the talloc parent for its members.
*****************************************************************************/
NTSTATUS serverinfo_to_SamInfo3(const struct auth_serversupplied_info *server_info,
uint8_t *pipe_session_key,
size_t pipe_session_key_len,
struct netr_SamInfo3 *sam3)
{
struct netr_SamInfo3 *info3;
info3 = copy_netr_SamInfo3(sam3, server_info->info3);
if (!info3) {
return NT_STATUS_NO_MEMORY;
}
if (server_info->user_session_key.length) {
memcpy(info3->base.key.key,
server_info->user_session_key.data,
MIN(sizeof(info3->base.key.key),
server_info->user_session_key.length));
if (pipe_session_key) {
arcfour_crypt(info3->base.key.key,
pipe_session_key, 16);
}
}
if (server_info->lm_session_key.length) {
memcpy(info3->base.LMSessKey.key,
server_info->lm_session_key.data,
MIN(sizeof(info3->base.LMSessKey.key),
server_info->lm_session_key.length));
if (pipe_session_key) {
arcfour_crypt(info3->base.LMSessKey.key,
pipe_session_key, 8);
}
}
sam3->base = info3->base;
sam3->sidcount = 0;
sam3->sids = NULL;
return NT_STATUS_OK;
}
/****************************************************************************
inits a netr_SamInfo6 structure from an auth_serversupplied_info. sam6 must
already be initialized and is used as the talloc parent for its members.
*****************************************************************************/
NTSTATUS serverinfo_to_SamInfo6(struct auth_serversupplied_info *server_info,
uint8_t *pipe_session_key,
size_t pipe_session_key_len,
struct netr_SamInfo6 *sam6)
{
struct pdb_domain_info *dominfo;
struct netr_SamInfo3 *info3;
if ((pdb_capabilities() & PDB_CAP_ADS) == 0) {
DEBUG(10,("Not adding validation info level 6 "
"without ADS passdb backend\n"));
return NT_STATUS_INVALID_INFO_CLASS;
}
dominfo = pdb_get_domain_info(sam6);
if (dominfo == NULL) {
return NT_STATUS_NO_MEMORY;
}
info3 = copy_netr_SamInfo3(sam6, server_info->info3);
if (!info3) {
return NT_STATUS_NO_MEMORY;
}
if (server_info->user_session_key.length) {
memcpy(info3->base.key.key,
server_info->user_session_key.data,
MIN(sizeof(info3->base.key.key),
server_info->user_session_key.length));
if (pipe_session_key) {
arcfour_crypt(info3->base.key.key,
pipe_session_key, 16);
}
}
if (server_info->lm_session_key.length) {
memcpy(info3->base.LMSessKey.key,
server_info->lm_session_key.data,
MIN(sizeof(info3->base.LMSessKey.key),
server_info->lm_session_key.length));
if (pipe_session_key) {
arcfour_crypt(info3->base.LMSessKey.key,
pipe_session_key, 8);
}
}
sam6->base = info3->base;
sam6->sidcount = 0;
sam6->sids = NULL;
sam6->dns_domainname.string = talloc_strdup(sam6, dominfo->dns_domain);
if (sam6->dns_domainname.string == NULL) {
return NT_STATUS_NO_MEMORY;
}
sam6->principle.string = talloc_asprintf(sam6, "%s@%s",
sam6->base.account_name.string,
sam6->dns_domainname.string);
if (sam6->principle.string == NULL) {
return NT_STATUS_NO_MEMORY;
}
return NT_STATUS_OK;
}
static NTSTATUS append_netr_SidAttr(TALLOC_CTX *mem_ctx,
struct netr_SidAttr **sids,
uint32_t *count,
const struct dom_sid2 *asid,
uint32_t attributes)
{
uint32_t t = *count;
*sids = talloc_realloc(mem_ctx, *sids, struct netr_SidAttr, t + 1);
if (*sids == NULL) {
return NT_STATUS_NO_MEMORY;
}
(*sids)[t].sid = dom_sid_dup(*sids, asid);
if ((*sids)[t].sid == NULL) {
return NT_STATUS_NO_MEMORY;
}
(*sids)[t].attributes = attributes;
*count = t + 1;
return NT_STATUS_OK;
}
/* Fills the samr_RidWithAttributeArray with the provided sids.
* If it happens that we have additional groups that do not belong
* to the domain, add their sids as extra sids */
static NTSTATUS group_sids_to_info3(struct netr_SamInfo3 *info3,
const struct dom_sid *sids,
size_t num_sids)
{
uint32_t attributes = SE_GROUP_MANDATORY |
SE_GROUP_ENABLED_BY_DEFAULT |
SE_GROUP_ENABLED;
struct samr_RidWithAttributeArray *groups;
struct dom_sid *domain_sid;
unsigned int i;
NTSTATUS status;
uint32_t rid;
bool ok;
domain_sid = info3->base.domain_sid;
groups = &info3->base.groups;
groups->rids = talloc_array(info3,
struct samr_RidWithAttribute, num_sids);
if (!groups->rids) {
return NT_STATUS_NO_MEMORY;
}
for (i = 0; i < num_sids; i++) {
ok = sid_peek_check_rid(domain_sid, &sids[i], &rid);
if (ok) {
/* if it is the primary gid, skip it, we
* obviously already have it */
if (info3->base.primary_gid == rid) continue;
/* store domain group rid */
groups->rids[i].rid = rid;
groups->rids[i].attributes = attributes;
groups->count++;
continue;
}
/* if this wasn't a domain sid, add it as extra sid */
status = append_netr_SidAttr(info3, &info3->sids,
&info3->sidcount,
&sids[i], attributes);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
}
return NT_STATUS_OK;
}
#define RET_NOMEM(ptr) do { \
if (!ptr) { \
TALLOC_FREE(info3); \
return NT_STATUS_NO_MEMORY; \
} } while(0)
NTSTATUS samu_to_SamInfo3(TALLOC_CTX *mem_ctx,
struct samu *samu,
const char *login_server,
struct netr_SamInfo3 **_info3,
struct extra_auth_info *extra)
{
struct netr_SamInfo3 *info3;
const struct dom_sid *user_sid;
const struct dom_sid *group_sid;
struct dom_sid domain_sid;
struct dom_sid *group_sids;
size_t num_group_sids = 0;
const char *tmp;
gid_t *gids;
NTSTATUS status;
bool ok;
user_sid = pdb_get_user_sid(samu);
group_sid = pdb_get_group_sid(samu);
if (!user_sid || !group_sid) {
DEBUG(1, ("Sam account is missing sids!\n"));
return NT_STATUS_UNSUCCESSFUL;
}
info3 = talloc_zero(mem_ctx, struct netr_SamInfo3);
if (!info3) {
return NT_STATUS_NO_MEMORY;
}
ZERO_STRUCT(domain_sid);
/* check if this is a "Unix Users" domain user,
* we need to handle it in a special way if that's the case */
if (sid_check_is_in_unix_users(user_sid)) {
/* in info3 you can only set rids for the user and the
* primary group, and the domain sid must be that of
* the sam domain.
*
* Store a completely bogus value here.
* The real SID is stored in the extra sids.
* Other code will know to look there if (-1) is found
*/
info3->base.rid = (uint32_t)(-1);
sid_copy(&extra->user_sid, user_sid);
DEBUG(10, ("Unix User found in struct samu. Rid marked as "
"special and sid (%s) saved as extra sid\n",
sid_string_dbg(user_sid)));
} else {
sid_copy(&domain_sid, user_sid);
sid_split_rid(&domain_sid, &info3->base.rid);
}
if (is_null_sid(&domain_sid)) {
sid_copy(&domain_sid, get_global_sam_sid());
}
/* check if this is a "Unix Groups" domain group,
* if so we need special handling */
if (sid_check_is_in_unix_groups(group_sid)) {
/* in info3 you can only set rids for the user and the
* primary group, and the domain sid must be that of
* the sam domain.
*
* Store a completely bogus value here.
* The real SID is stored in the extra sids.
* Other code will know to look there if (-1) is found
*/
info3->base.primary_gid = (uint32_t)(-1);
sid_copy(&extra->pgid_sid, group_sid);
DEBUG(10, ("Unix Group found in struct samu. Rid marked as "
"special and sid (%s) saved as extra sid\n",
sid_string_dbg(group_sid)));
} else {
ok = sid_peek_check_rid(&domain_sid, group_sid,
&info3->base.primary_gid);
if (!ok) {
DEBUG(1, ("The primary group domain sid(%s) does not "
"match the domain sid(%s) for %s(%s)\n",
sid_string_dbg(group_sid),
sid_string_dbg(&domain_sid),
pdb_get_username(samu),
sid_string_dbg(user_sid)));
TALLOC_FREE(info3);
return NT_STATUS_UNSUCCESSFUL;
}
}
unix_to_nt_time(&info3->base.last_logon, pdb_get_logon_time(samu));
unix_to_nt_time(&info3->base.last_logoff, get_time_t_max());
unix_to_nt_time(&info3->base.acct_expiry, get_time_t_max());
unix_to_nt_time(&info3->base.last_password_change,
pdb_get_pass_last_set_time(samu));
unix_to_nt_time(&info3->base.allow_password_change,
pdb_get_pass_can_change_time(samu));
unix_to_nt_time(&info3->base.force_password_change,
pdb_get_pass_must_change_time(samu));
tmp = pdb_get_username(samu);
if (tmp) {
info3->base.account_name.string = talloc_strdup(info3, tmp);
RET_NOMEM(info3->base.account_name.string);
}
tmp = pdb_get_fullname(samu);
if (tmp) {
info3->base.full_name.string = talloc_strdup(info3, tmp);
RET_NOMEM(info3->base.full_name.string);
}
tmp = pdb_get_logon_script(samu);
if (tmp) {
info3->base.logon_script.string = talloc_strdup(info3, tmp);
RET_NOMEM(info3->base.logon_script.string);
}
tmp = pdb_get_profile_path(samu);
if (tmp) {
info3->base.profile_path.string = talloc_strdup(info3, tmp);
RET_NOMEM(info3->base.profile_path.string);
}
tmp = pdb_get_homedir(samu);
if (tmp) {
info3->base.home_directory.string = talloc_strdup(info3, tmp);
RET_NOMEM(info3->base.home_directory.string);
}
tmp = pdb_get_dir_drive(samu);
if (tmp) {
info3->base.home_drive.string = talloc_strdup(info3, tmp);
RET_NOMEM(info3->base.home_drive.string);
}
info3->base.logon_count = pdb_get_logon_count(samu);
info3->base.bad_password_count = pdb_get_bad_password_count(samu);
status = pdb_enum_group_memberships(mem_ctx, samu,
&group_sids, &gids,
&num_group_sids);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(1, ("Failed to get groups from sam account.\n"));
TALLOC_FREE(info3);
return status;
}
if (num_group_sids) {
status = group_sids_to_info3(info3, group_sids, num_group_sids);
if (!NT_STATUS_IS_OK(status)) {
TALLOC_FREE(info3);
return status;
}
}
/* We don't need sids and gids after the conversion */
TALLOC_FREE(group_sids);
TALLOC_FREE(gids);
num_group_sids = 0;
/* FIXME: should we add other flags ? */
info3->base.user_flags = NETLOGON_EXTRA_SIDS;
if (login_server) {
info3->base.logon_server.string = talloc_strdup(info3, login_server);
RET_NOMEM(info3->base.logon_server.string);
}
info3->base.domain.string = talloc_strdup(info3,
pdb_get_domain(samu));
RET_NOMEM(info3->base.domain.string);
info3->base.domain_sid = dom_sid_dup(info3, &domain_sid);
RET_NOMEM(info3->base.domain_sid);
info3->base.acct_flags = pdb_get_acct_ctrl(samu);
*_info3 = info3;
return NT_STATUS_OK;
}
#undef RET_NOMEM
#define RET_NOMEM(ptr) do { \
if (!ptr) { \
TALLOC_FREE(info3); \
return NULL; \
} } while(0)
struct netr_SamInfo3 *copy_netr_SamInfo3(TALLOC_CTX *mem_ctx,
struct netr_SamInfo3 *orig)
{
struct netr_SamInfo3 *info3;
unsigned int i;
info3 = talloc_zero(mem_ctx, struct netr_SamInfo3);
if (!info3) return NULL;
/* first copy all, then realloc pointers */
info3->base = orig->base;
if (orig->base.account_name.string) {
info3->base.account_name.string =
talloc_strdup(info3, orig->base.account_name.string);
RET_NOMEM(info3->base.account_name.string);
}
if (orig->base.full_name.string) {
info3->base.full_name.string =
talloc_strdup(info3, orig->base.full_name.string);
RET_NOMEM(info3->base.full_name.string);
}
if (orig->base.logon_script.string) {
info3->base.logon_script.string =
talloc_strdup(info3, orig->base.logon_script.string);
RET_NOMEM(info3->base.logon_script.string);
}
if (orig->base.profile_path.string) {
info3->base.profile_path.string =
talloc_strdup(info3, orig->base.profile_path.string);
RET_NOMEM(info3->base.profile_path.string);
}
if (orig->base.home_directory.string) {
info3->base.home_directory.string =
talloc_strdup(info3, orig->base.home_directory.string);
RET_NOMEM(info3->base.home_directory.string);
}
if (orig->base.home_drive.string) {
info3->base.home_drive.string =
talloc_strdup(info3, orig->base.home_drive.string);
RET_NOMEM(info3->base.home_drive.string);
}
if (orig->base.groups.count) {
info3->base.groups.rids = (struct samr_RidWithAttribute *)
talloc_memdup(info3, orig->base.groups.rids,
(sizeof(struct samr_RidWithAttribute) *
orig->base.groups.count));
RET_NOMEM(info3->base.groups.rids);
}
if (orig->base.logon_server.string) {
info3->base.logon_server.string =
talloc_strdup(info3, orig->base.logon_server.string);
RET_NOMEM(info3->base.logon_server.string);
}
if (orig->base.domain.string) {
info3->base.domain.string =
talloc_strdup(info3, orig->base.domain.string);
RET_NOMEM(info3->base.domain.string);
}
if (orig->base.domain_sid) {
info3->base.domain_sid = dom_sid_dup(info3, orig->base.domain_sid);
RET_NOMEM(info3->base.domain_sid);
}
if (orig->sidcount) {
info3->sidcount = orig->sidcount;
info3->sids = talloc_array(info3, struct netr_SidAttr,
orig->sidcount);
RET_NOMEM(info3->sids);
for (i = 0; i < orig->sidcount; i++) {
info3->sids[i].sid = dom_sid_dup(info3->sids,
orig->sids[i].sid);
RET_NOMEM(info3->sids[i].sid);
info3->sids[i].attributes =
orig->sids[i].attributes;
}
}
return info3;
}
static NTSTATUS wbcsids_to_samr_RidWithAttributeArray(
TALLOC_CTX *mem_ctx,
struct samr_RidWithAttributeArray *groups,
const struct dom_sid *domain_sid,
const struct wbcSidWithAttr *sids,
size_t num_sids)
{
unsigned int i;
bool ok;
groups->rids = talloc_array(mem_ctx,
struct samr_RidWithAttribute, num_sids);
if (!groups->rids) {
return NT_STATUS_NO_MEMORY;
}
/* a wbcDomainSid is the same as a dom_sid */
for (i = 0; i < num_sids; i++) {
ok = sid_peek_check_rid(domain_sid,
(const struct dom_sid *)&sids[i].sid,
&groups->rids[i].rid);
if (!ok) continue;
groups->rids[i].attributes = SE_GROUP_MANDATORY |
SE_GROUP_ENABLED_BY_DEFAULT |
SE_GROUP_ENABLED;
groups->count++;
}
return NT_STATUS_OK;
}
struct netr_SamInfo3 *wbcAuthUserInfo_to_netr_SamInfo3(TALLOC_CTX *mem_ctx,
const struct wbcAuthUserInfo *info)
{
struct netr_SamInfo3 *info3;
struct dom_sid user_sid;
struct dom_sid group_sid;
struct dom_sid domain_sid;
NTSTATUS status;
bool ok;
memcpy(&user_sid, &info->sids[0].sid, sizeof(user_sid));
memcpy(&group_sid, &info->sids[1].sid, sizeof(group_sid));
info3 = talloc_zero(mem_ctx, struct netr_SamInfo3);
if (!info3) return NULL;
info3->base.last_logon = info->logon_time;
info3->base.last_logoff = info->logoff_time;
info3->base.acct_expiry = info->kickoff_time;
info3->base.last_password_change = info->pass_last_set_time;
info3->base.allow_password_change = info->pass_can_change_time;
info3->base.force_password_change = info->pass_must_change_time;
if (info->account_name) {
info3->base.account_name.string =
talloc_strdup(info3, info->account_name);
RET_NOMEM(info3->base.account_name.string);
}
if (info->full_name) {
info3->base.full_name.string =
talloc_strdup(info3, info->full_name);
RET_NOMEM(info3->base.full_name.string);
}
if (info->logon_script) {
info3->base.logon_script.string =
talloc_strdup(info3, info->logon_script);
RET_NOMEM(info3->base.logon_script.string);
}
if (info->profile_path) {
info3->base.profile_path.string =
talloc_strdup(info3, info->profile_path);
RET_NOMEM(info3->base.profile_path.string);
}
if (info->home_directory) {
info3->base.home_directory.string =
talloc_strdup(info3, info->home_directory);
RET_NOMEM(info3->base.home_directory.string);
}
if (info->home_drive) {
info3->base.home_drive.string =
talloc_strdup(info3, info->home_drive);
RET_NOMEM(info3->base.home_drive.string);
}
info3->base.logon_count = info->logon_count;
info3->base.bad_password_count = info->bad_password_count;
sid_copy(&domain_sid, &user_sid);
sid_split_rid(&domain_sid, &info3->base.rid);
ok = sid_peek_check_rid(&domain_sid, &group_sid,
&info3->base.primary_gid);
if (!ok) {
DEBUG(1, ("The primary group sid domain does not"
"match user sid domain for user: %s\n",
info->account_name));
TALLOC_FREE(info3);
return NULL;
}
status = wbcsids_to_samr_RidWithAttributeArray(info3,
&info3->base.groups,
&domain_sid,
&info->sids[1],
info->num_sids - 1);
if (!NT_STATUS_IS_OK(status)) {
TALLOC_FREE(info3);
return NULL;
}
info3->base.user_flags = info->user_flags;
memcpy(info3->base.key.key, info->user_session_key, 16);
if (info->logon_server) {
info3->base.logon_server.string =
talloc_strdup(info3, info->logon_server);
RET_NOMEM(info3->base.logon_server.string);
}
if (info->domain_name) {
info3->base.domain.string =
talloc_strdup(info3, info->domain_name);
RET_NOMEM(info3->base.domain.string);
}
info3->base.domain_sid = dom_sid_dup(info3, &domain_sid);
RET_NOMEM(info3->base.domain_sid);
memcpy(info3->base.LMSessKey.key, info->lm_session_key, 8);
info3->base.acct_flags = info->acct_flags;
return info3;
}