/* functions moved from auth/auth_util.c to minimize linker deps */
#include "includes.h"
+#include "system/passwd.h"
#include "auth.h"
#include "secrets.h"
-#include "memcache.h"
+#include "../lib/util/memcache.h"
#include "../librpc/gen_ndr/netlogon.h"
#include "../libcli/security/security.h"
#include "../lib/util/util_pw.h"
cache_data, struct security_token);
}
- if ( !(pw = sys_getpwuid(0)) ) {
- if ( !(pw = sys_getpwnam("root")) ) {
- DEBUG(0,("get_root_nt_token: both sys_getpwuid(0) "
- "and sys_getpwnam(\"root\") failed!\n"));
+ if ( !(pw = getpwuid(0)) ) {
+ if ( !(pw = getpwnam("root")) ) {
+ DEBUG(0,("get_root_nt_token: both getpwuid(0) "
+ "and getpwnam(\"root\") failed!\n"));
return NULL;
}
}
return result;
}
+/***************************************************
+ Merge in any groups from /etc/group.
+***************************************************/
+
+static NTSTATUS add_local_groups(struct security_token *result,
+ bool is_guest)
+{
+ gid_t *gids = NULL;
+ uint32_t getgroups_num_group_sids = 0;
+ struct passwd *pass = NULL;
+ TALLOC_CTX *tmp_ctx = talloc_stackframe();
+ int i;
+
+ if (is_guest) {
+ /*
+ * Guest is a special case. It's always
+ * a user that can be looked up, but
+ * result->sids[0] is set to DOMAIN\Guest.
+ * Lookup by account name instead.
+ */
+ pass = Get_Pwnam_alloc(tmp_ctx, lp_guest_account());
+ } else {
+ uid_t uid;
+
+ /* For non-guest result->sids[0] is always the user sid. */
+ if (!sid_to_uid(&result->sids[0], &uid)) {
+ /*
+ * Non-mappable SID like SYSTEM.
+ * Can't be in any /etc/group groups.
+ */
+ TALLOC_FREE(tmp_ctx);
+ return NT_STATUS_OK;
+ }
+
+ pass = getpwuid_alloc(tmp_ctx, uid);
+ if (pass == NULL) {
+ DEBUG(1, ("SID %s -> getpwuid(%u) failed\n",
+ sid_string_dbg(&result->sids[0]),
+ (unsigned int)uid));
+ }
+ }
+
+ if (!pass) {
+ TALLOC_FREE(tmp_ctx);
+ return NT_STATUS_UNSUCCESSFUL;
+ }
+
+ /*
+ * Now we must get any groups this user has been
+ * added to in /etc/group and merge them in.
+ * This has to be done in every code path
+ * that creates an NT token, as remote users
+ * may have been added to the local /etc/group
+ * database. Tokens created merely from the
+ * info3 structs (via the DC or via the krb5 PAC)
+ * won't have these local groups. Note the
+ * groups added here will only be UNIX groups
+ * (S-1-22-2-XXXX groups) as getgroups_unix_user()
+ * turns off winbindd before calling getgroups().
+ *
+ * NB. This is duplicating work already
+ * done in the 'unix_user:' case of
+ * create_token_from_sid() but won't
+ * do anything other than be inefficient
+ * in that case.
+ */
+
+ if (!getgroups_unix_user(tmp_ctx, pass->pw_name, pass->pw_gid,
+ &gids, &getgroups_num_group_sids)) {
+ DEBUG(1, ("getgroups_unix_user for user %s failed\n",
+ pass->pw_name));
+ TALLOC_FREE(tmp_ctx);
+ return NT_STATUS_UNSUCCESSFUL;
+ }
+
+ for (i=0; i<getgroups_num_group_sids; i++) {
+ NTSTATUS status;
+ struct dom_sid grp_sid;
+ gid_to_sid(&grp_sid, gids[i]);
+
+ status = add_sid_to_array_unique(result,
+ &grp_sid,
+ &result->sids,
+ &result->num_sids);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(3, ("Failed to add UNIX SID to nt token\n"));
+ TALLOC_FREE(tmp_ctx);
+ return status;
+ }
+ }
+ TALLOC_FREE(tmp_ctx);
+ return NT_STATUS_OK;
+}
+
static NTSTATUS finalize_local_nt_token(struct security_token *result,
bool is_guest)
{
struct dom_sid dom_sid;
- gid_t gid;
NTSTATUS status;
+ struct acct_info *info;
+
+ /* Add any local groups. */
+
+ status = add_local_groups(result, is_guest);
+ if (!NT_STATUS_IS_OK(status)) {
+ return status;
+ }
/* Add in BUILTIN sids */
}
}
+ info = talloc_zero(talloc_tos(), struct acct_info);
+ if (info == NULL) {
+ DEBUG(0, ("talloc failed!\n"));
+ return NT_STATUS_NO_MEMORY;
+ }
+
/* Deal with the BUILTIN\Administrators group. If the SID can
be resolved then assume that the add_aliasmem( S-1-5-32 )
handled it. */
- if (!sid_to_gid(&global_sid_Builtin_Administrators, &gid)) {
+ status = pdb_get_aliasinfo(&global_sid_Builtin_Administrators, info);
+ if (!NT_STATUS_IS_OK(status)) {
become_root();
if (!secrets_fetch_domain_sid(lp_workgroup(), &dom_sid)) {
be resolved then assume that the add_aliasmem( S-1-5-32 )
handled it. */
- if (!sid_to_gid(&global_sid_Builtin_Users, &gid)) {
+ status = pdb_get_aliasinfo(&global_sid_Builtin_Users, info);
+ if (!NT_STATUS_IS_OK(status)) {
become_root();
if (!secrets_fetch_domain_sid(lp_workgroup(), &dom_sid)) {
}
}
+ TALLOC_FREE(info);
+
/* Deal with local groups */
if (lp_winbind_nested_groups()) {
}
/*
- * Create an artificial NT token given just a username. (Initially intended
- * for force user)
- *
- * We go through lookup_name() to avoid problems we had with 'winbind use
- * default domain'.
+ * Create an artificial NT token given just a domain SID.
*
* We have 3 cases:
*
* http://lists.samba.org/archive/samba-technical/2006-January/044803.html.
*/
-NTSTATUS create_token_from_username(TALLOC_CTX *mem_ctx, const char *username,
- bool is_guest,
- uid_t *uid, gid_t *gid,
- char **found_username,
- struct security_token **token)
+static NTSTATUS create_token_from_sid(TALLOC_CTX *mem_ctx,
+ const struct dom_sid *user_sid,
+ bool is_guest,
+ uid_t *uid, gid_t *gid,
+ char **found_username,
+ struct security_token **token)
{
NTSTATUS result = NT_STATUS_NO_SUCH_USER;
TALLOC_CTX *tmp_ctx = talloc_stackframe();
- struct dom_sid user_sid;
- enum lsa_SidType type;
gid_t *gids;
struct dom_sid *group_sids;
struct dom_sid unix_group_sid;
+ struct dom_sid tmp_sid;
uint32_t num_group_sids;
uint32_t num_gids;
uint32_t i;
+ uint32_t high, low;
+ bool range_ok;
- if (!lookup_name_smbconf(tmp_ctx, username, LOOKUP_NAME_ALL,
- NULL, NULL, &user_sid, &type)) {
- DEBUG(1, ("lookup_name_smbconf for %s failed\n", username));
- goto done;
- }
-
- if (type != SID_NAME_USER) {
- DEBUG(1, ("%s is a %s, not a user\n", username,
- sid_type_lookup(type)));
- goto done;
- }
-
- if (sid_check_is_in_our_domain(&user_sid)) {
+ if (sid_check_is_in_our_sam(user_sid)) {
bool ret;
uint32_t pdb_num_group_sids;
/* This is a passdb user, so ask passdb */
}
become_root();
- ret = pdb_getsampwsid(sam_acct, &user_sid);
+ ret = pdb_getsampwsid(sam_acct, user_sid);
unbecome_root();
if (!ret) {
- DEBUG(1, ("pdb_getsampwsid(%s) for user %s failed\n",
- sid_string_dbg(&user_sid), username));
- DEBUGADD(1, ("Fall back to unix user %s\n", username));
+ DEBUG(1, ("pdb_getsampwsid(%s) failed\n",
+ sid_string_dbg(user_sid)));
+ DEBUGADD(1, ("Fall back to unix user\n"));
goto unix_user;
}
&group_sids, &gids,
&pdb_num_group_sids);
if (!NT_STATUS_IS_OK(result)) {
- DEBUG(1, ("enum_group_memberships failed for %s (%s): "
- "%s\n", username, sid_string_dbg(&user_sid),
+ DEBUG(1, ("enum_group_memberships failed for %s: "
+ "%s\n", sid_string_dbg(user_sid),
nt_errstr(result)));
- DEBUGADD(1, ("Fall back to unix user %s\n", username));
+ DEBUGADD(1, ("Fall back to unix uid lookup\n"));
goto unix_user;
}
num_group_sids = pdb_num_group_sids;
*found_username = talloc_strdup(mem_ctx,
pdb_get_username(sam_acct));
+ if (*found_username == NULL) {
+ result = NT_STATUS_NO_MEMORY;
+ goto done;
+ }
+
/*
* If the SID from lookup_name() was the guest sid, passdb knows
- * about the mapping of guest sid to lp_guestaccount()
+ * about the mapping of guest sid to lp_guest_account()
* username and will return the unix_pw info for a guest
* user. Use it if it's there, else lookup the *uid details
* using Get_Pwnam_alloc(). See bug #6291 for details. JRA.
}
*uid = sam_acct->unix_pw->pw_uid;
- } else if (sid_check_is_in_unix_users(&user_sid)) {
+ } else if (sid_check_is_in_unix_users(user_sid)) {
uint32_t getgroups_num_group_sids;
/* This is a unix user not in passdb. We need to ask nss
* directly, without consulting passdb */
unix_user:
- if (!sid_to_uid(&user_sid, uid)) {
- DEBUG(1, ("unix_user case, sid_to_uid for %s (%s) failed\n",
- username, sid_string_dbg(&user_sid)));
+ if (!sid_to_uid(user_sid, uid)) {
+ DEBUG(1, ("unix_user case, sid_to_uid for %s failed\n",
+ sid_string_dbg(user_sid)));
result = NT_STATUS_NO_SUCH_USER;
goto done;
}
- uid_to_unix_users_sid(*uid, &user_sid);
+ uid_to_unix_users_sid(*uid, &tmp_sid);
+ user_sid = &tmp_sid;
pass = getpwuid_alloc(tmp_ctx, *uid);
if (pass == NULL) {
- DEBUG(1, ("getpwuid(%u) for user %s failed\n",
- (unsigned int)*uid, username));
+ DEBUG(1, ("getpwuid(%u) failed\n",
+ (unsigned int)*uid));
goto done;
}
- if (!getgroups_unix_user(tmp_ctx, username, pass->pw_gid,
+ if (!getgroups_unix_user(tmp_ctx, pass->pw_name, pass->pw_gid,
&gids, &getgroups_num_group_sids)) {
DEBUG(1, ("getgroups_unix_user for user %s failed\n",
- username));
+ pass->pw_name));
goto done;
}
num_group_sids = getgroups_num_group_sids;
/* Ensure we're returning the found_username on the right context. */
*found_username = talloc_strdup(mem_ctx, pass->pw_name);
+ if (*found_username == NULL) {
+ result = NT_STATUS_NO_MEMORY;
+ goto done;
+ }
} else {
/* This user is from winbind, force the primary gid to the
* information. */
/* We must always assign the *uid. */
- if (!sid_to_uid(&user_sid, uid)) {
- DEBUG(1, ("winbindd case, sid_to_uid for %s (%s) failed\n",
- username, sid_string_dbg(&user_sid)));
+ if (!sid_to_uid(user_sid, uid)) {
+ DEBUG(1, ("winbindd case, sid_to_uid for %s failed\n",
+ sid_string_dbg(user_sid)));
result = NT_STATUS_NO_SUCH_USER;
goto done;
}
goto done;
}
- sid_copy(&group_sids[0], &user_sid);
+ sid_copy(&group_sids[0], user_sid);
sid_split_rid(&group_sids[0], NULL);
sid_append_rid(&group_sids[0], DOMAIN_RID_USERS);
gids = gid;
- /* Ensure we're returning the found_username on the right context. */
- *found_username = talloc_strdup(mem_ctx, username);
+ *found_username = NULL;
}
/* Add the "Unix Group" SID for each gid to catch mapped groups
to 'valid user = "Domain Admins"'. --jerry */
num_gids = num_group_sids;
+ range_ok = lp_idmap_default_range(&low, &high);
for ( i=0; i<num_gids; i++ ) {
- gid_t high, low;
/* don't pickup anything managed by Winbind */
-
- if ( lp_idmap_gid(&low, &high) && (gids[i] >= low) && (gids[i] <= high) )
+ if (range_ok && (gids[i] >= low) && (gids[i] <= high)) {
continue;
+ }
gid_to_unix_groups_sid(gids[i], &unix_group_sid);
}
/* Ensure we're creating the nt_token on the right context. */
- *token = create_local_nt_token(mem_ctx, &user_sid,
+ *token = create_local_nt_token(mem_ctx, user_sid,
is_guest, num_group_sids, group_sids);
- if ((*token == NULL) || (*found_username == NULL)) {
+ if (*token == NULL) {
result = NT_STATUS_NO_MEMORY;
goto done;
}
return result;
}
+/*
+ * Create an artificial NT token given just a username. (Initially intended
+ * for force user)
+ *
+ * We go through lookup_name() to avoid problems we had with 'winbind use
+ * default domain'.
+ *
+ * We have 3 cases:
+ *
+ * unmapped unix users: Go directly to nss to find the user's group.
+ *
+ * A passdb user: The list of groups is provided by pdb_enum_group_memberships.
+ *
+ * If the user is provided by winbind, the primary gid is set to "domain
+ * users" of the user's domain. For an explanation why this is necessary, see
+ * the thread starting at
+ * http://lists.samba.org/archive/samba-technical/2006-January/044803.html.
+ */
+
+NTSTATUS create_token_from_username(TALLOC_CTX *mem_ctx, const char *username,
+ bool is_guest,
+ uid_t *uid, gid_t *gid,
+ char **found_username,
+ struct security_token **token)
+{
+ NTSTATUS result = NT_STATUS_NO_SUCH_USER;
+ TALLOC_CTX *tmp_ctx = talloc_stackframe();
+ struct dom_sid user_sid;
+ enum lsa_SidType type;
+
+ if (!lookup_name_smbconf(tmp_ctx, username, LOOKUP_NAME_ALL,
+ NULL, NULL, &user_sid, &type)) {
+ DEBUG(1, ("lookup_name_smbconf for %s failed\n", username));
+ goto done;
+ }
+
+ if (type != SID_NAME_USER) {
+ DEBUG(1, ("%s is a %s, not a user\n", username,
+ sid_type_lookup(type)));
+ goto done;
+ }
+
+ result = create_token_from_sid(mem_ctx, &user_sid, is_guest, uid, gid, found_username, token);
+
+ if (!NT_STATUS_IS_OK(result)) {
+ goto done;
+ }
+
+ /*
+ * If result == NT_STATUS_OK then
+ * we know we have a valid token. Ensure
+ * we also have a valid username to match.
+ */
+
+ if (*found_username == NULL) {
+ *found_username = talloc_strdup(mem_ctx, username);
+ if (*found_username == NULL) {
+ result = NT_STATUS_NO_MEMORY;
+ }
+ }
+
+done:
+ TALLOC_FREE(tmp_ctx);
+ return result;
+}
+
+/***************************************************************************
+ Build upon create_token_from_sid:
+
+ Expensive helper function to figure out whether a user given its sid is
+ member of a particular group.
+***************************************************************************/
+
+bool user_sid_in_group_sid(const struct dom_sid *sid, const struct dom_sid *group_sid)
+{
+ NTSTATUS status;
+ uid_t uid;
+ gid_t gid;
+ char *found_username;
+ struct security_token *token;
+ bool result = false;
+ enum lsa_SidType type;
+ TALLOC_CTX *mem_ctx = talloc_stackframe();
+
+ if (!lookup_sid(mem_ctx, sid,
+ NULL, NULL, &type)) {
+ DEBUG(1, ("lookup_sid for %s failed\n", dom_sid_string(mem_ctx, sid)));
+ goto done;
+ }
+
+ if (type != SID_NAME_USER) {
+ DEBUG(5, ("%s is a %s, not a user\n", dom_sid_string(mem_ctx, sid),
+ sid_type_lookup(type)));
+ goto done;
+ }
+
+ status = create_token_from_sid(mem_ctx, sid, False,
+ &uid, &gid, &found_username,
+ &token);
+
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(10, ("could not create token for %s\n", dom_sid_string(mem_ctx, sid)));
+ goto done;
+ }
+
+ result = security_token_has_sid(token, group_sid);
+
+done:
+ TALLOC_FREE(mem_ctx);
+ return result;
+}
+
/***************************************************************************
Build upon create_token_from_username:
git.samba.org / samba.git / blobdiff