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9195792a38
This reverts commit ae6a779bf9.
Bug 9125 analysis from Volker:
The problem is that there are no network calls possible at all that
would do what the samlogon cache does for us. There is just no way to
retrieve the group membership in a complex trusted environment. If you
have just a single domain with Samba as domain controller it might be
possible, but even within a single domain it is not possible to
correctly retrieve all group memberships using LDAP calls due to ACLs on
directory objects. The call to get that is called NetSamLogon on the
NETLOGON pipe. But this call requires user credentials and might trigger
updating counts on the server. So to correctly implement wbinfo -r after
a user has logged in, you have two alternatives: Save the info3 struct
or the PAC in the netsamlogon cache. If you insist on doing network
calls, you need to cache the user credentials somewhere to re-do the
NetSamLogon call every time the wbinfo -r is requested.
Reviewed-by: Andreas Schneider <asn@samba.org>
146 lines
3.4 KiB
C
146 lines
3.4 KiB
C
/*
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Unix SMB/CIFS implementation.
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Winbind daemon - cached credentials funcions
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Copyright (C) Guenther Deschner 2005
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "includes.h"
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#include "winbindd.h"
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#include "../libcli/auth/libcli_auth.h"
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#include "../libcli/security/security.h"
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#undef DBGC_CLASS
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#define DBGC_CLASS DBGC_WINBIND
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#define MAX_CACHED_LOGINS 10
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NTSTATUS winbindd_get_creds(struct winbindd_domain *domain,
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TALLOC_CTX *mem_ctx,
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const struct dom_sid *sid,
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struct netr_SamInfo3 **info3,
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const uint8 *cached_nt_pass[NT_HASH_LEN],
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const uint8 *cred_salt[NT_HASH_LEN])
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{
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struct netr_SamInfo3 *info;
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NTSTATUS status;
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status = wcache_get_creds(domain, mem_ctx, sid, cached_nt_pass, cred_salt);
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if (!NT_STATUS_IS_OK(status)) {
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return status;
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}
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info = netsamlogon_cache_get(mem_ctx, sid);
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if (info == NULL) {
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return NT_STATUS_OBJECT_NAME_NOT_FOUND;
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}
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*info3 = info;
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return NT_STATUS_OK;
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}
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NTSTATUS winbindd_store_creds(struct winbindd_domain *domain,
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const char *user,
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const char *pass,
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struct netr_SamInfo3 *info3)
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{
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NTSTATUS status;
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uchar nt_pass[NT_HASH_LEN];
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struct dom_sid cred_sid;
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if (info3 != NULL) {
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sid_compose(&cred_sid, info3->base.domain_sid,
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info3->base.rid);
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info3->base.user_flags |= NETLOGON_CACHED_ACCOUNT;
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} else if (user != NULL) {
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/* do lookup ourself */
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enum lsa_SidType type;
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if (!lookup_cached_name(domain->name,
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user,
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&cred_sid,
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&type)) {
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return NT_STATUS_NO_SUCH_USER;
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}
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} else {
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return NT_STATUS_INVALID_PARAMETER;
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}
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if (pass) {
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int count = 0;
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status = wcache_count_cached_creds(domain, &count);
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if (!NT_STATUS_IS_OK(status)) {
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return status;
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}
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DEBUG(11,("we have %d cached creds\n", count));
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if (count + 1 > MAX_CACHED_LOGINS) {
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DEBUG(10,("need to delete the oldest cached login\n"));
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status = wcache_remove_oldest_cached_creds(domain, &cred_sid);
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if (!NT_STATUS_IS_OK(status)) {
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DEBUG(10,("failed to remove oldest cached cred: %s\n",
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nt_errstr(status)));
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return status;
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}
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}
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E_md4hash(pass, nt_pass);
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dump_data_pw("nt_pass", nt_pass, NT_HASH_LEN);
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status = wcache_save_creds(domain, &cred_sid, nt_pass);
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if (!NT_STATUS_IS_OK(status)) {
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return status;
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}
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}
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if (info3 != NULL && user != NULL) {
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if (!netsamlogon_cache_store(user, info3)) {
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return NT_STATUS_ACCESS_DENIED;
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}
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}
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return NT_STATUS_OK;
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}
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NTSTATUS winbindd_update_creds_by_info3(struct winbindd_domain *domain,
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const char *user,
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const char *pass,
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struct netr_SamInfo3 *info3)
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{
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return winbindd_store_creds(domain, user, pass, info3);
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}
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NTSTATUS winbindd_update_creds_by_name(struct winbindd_domain *domain,
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const char *user,
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const char *pass)
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{
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return winbindd_store_creds(domain, user, pass, NULL);
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}
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