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bb3ea36e10
Bug: https://bugzilla.samba.org/show_bug.cgi?id=15361 Signed-off-by: Volker Lendecke <vl@samba.org> Reviewed-by: Stefan Metzmacher <metze@samba.org>
207 lines
6.0 KiB
C
207 lines
6.0 KiB
C
/*
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Unix SMB/CIFS implementation.
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Samba utility functions
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Copyright (C) Andrew Tridgell 1992-1998
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Copyright (C) Luke Kenneth Caseson Leighton 1998-1999
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Copyright (C) Jeremy Allison 1999
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Copyright (C) Stefan (metze) Metzmacher 2002
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Copyright (C) Simo Sorce 2002
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Copyright (C) Jim McDonough <jmcd@us.ibm.com> 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 "../librpc/gen_ndr/ndr_security.h"
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#include "../librpc/gen_ndr/netlogon.h"
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#include "../libcli/security/security.h"
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#include "lib/util/string_wrappers.h"
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#include "source3/lib/util_specialsids.h"
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/*****************************************************************
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Convert a SID to an ascii string.
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*****************************************************************/
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char *sid_to_fstring(fstring sidstr_out, const struct dom_sid *sid)
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{
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struct dom_sid_buf buf;
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fstrcpy(sidstr_out, dom_sid_str_buf(sid, &buf));
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return sidstr_out;
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}
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/*****************************************************************
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Write a sid out into on-the-wire format.
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*****************************************************************/
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bool sid_linearize(uint8_t *outbuf, size_t len, const struct dom_sid *sid)
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{
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struct ndr_push ndr = {
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.data = outbuf, .alloc_size = len, .fixed_buf_size = true,
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};
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enum ndr_err_code ndr_err;
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ndr_err = ndr_push_dom_sid(&ndr, NDR_SCALARS|NDR_BUFFERS, sid);
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return NDR_ERR_CODE_IS_SUCCESS(ndr_err);
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}
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/*****************************************************************
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Returns true if SID is internal (and non-mappable).
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*****************************************************************/
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bool non_mappable_sid(struct dom_sid *sid)
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{
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struct dom_sid dom;
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sid_copy(&dom, sid);
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sid_split_rid(&dom, NULL);
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if (dom_sid_equal(&dom, &global_sid_Builtin))
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return True;
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if (dom_sid_equal(&dom, &global_sid_NT_Authority))
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return True;
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return False;
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}
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/*****************************************************************
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Return the binary string representation of a struct dom_sid.
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Caller must free.
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*****************************************************************/
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char *sid_binstring_hex_talloc(TALLOC_CTX *mem_ctx, const struct dom_sid *sid)
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{
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int len = ndr_size_dom_sid(sid, 0);
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uint8_t buf[len];
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sid_linearize(buf, len, sid);
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return hex_encode_talloc(mem_ctx, buf, len);
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}
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NTSTATUS sid_array_from_info3(TALLOC_CTX *mem_ctx,
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const struct netr_SamInfo3 *info3,
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struct dom_sid **user_sids,
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uint32_t *num_user_sids,
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bool include_user_group_rid)
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{
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NTSTATUS status;
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struct dom_sid sid;
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struct dom_sid *sid_array = NULL;
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uint32_t num_sids = 0;
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uint32_t i;
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if (include_user_group_rid) {
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if (!sid_compose(&sid, info3->base.domain_sid, info3->base.rid)) {
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DEBUG(3, ("could not compose user SID from rid 0x%x\n",
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info3->base.rid));
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return NT_STATUS_INVALID_PARAMETER;
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}
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status = add_sid_to_array(mem_ctx, &sid, &sid_array, &num_sids);
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if (!NT_STATUS_IS_OK(status)) {
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DEBUG(3, ("could not append user SID from rid 0x%x\n",
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info3->base.rid));
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return status;
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}
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}
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if (!sid_compose(&sid, info3->base.domain_sid, info3->base.primary_gid)) {
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DEBUG(3, ("could not compose group SID from rid 0x%x\n",
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info3->base.primary_gid));
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return NT_STATUS_INVALID_PARAMETER;
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}
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status = add_sid_to_array(mem_ctx, &sid, &sid_array, &num_sids);
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if (!NT_STATUS_IS_OK(status)) {
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DEBUG(3, ("could not append group SID from rid 0x%x\n",
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info3->base.rid));
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return status;
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}
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for (i = 0; i < info3->base.groups.count; i++) {
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/* Don't add the primary group sid twice. */
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if (!sid_compose(&sid, info3->base.domain_sid,
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info3->base.groups.rids[i].rid)) {
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DEBUG(3, ("could not compose SID from additional group "
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"rid 0x%x\n", info3->base.groups.rids[i].rid));
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return NT_STATUS_INVALID_PARAMETER;
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}
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status = add_sid_to_array(mem_ctx, &sid, &sid_array, &num_sids);
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if (!NT_STATUS_IS_OK(status)) {
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DEBUG(3, ("could not append SID from additional group "
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"rid 0x%x\n", info3->base.groups.rids[i].rid));
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return status;
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}
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}
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/* Copy 'other' sids. We need to do sid filtering here to
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prevent possible elevation of privileges. See:
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http://www.microsoft.com/windows2000/techinfo/administration/security/sidfilter.asp
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*/
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for (i = 0; i < info3->sidcount; i++) {
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if (sid_check_is_in_asserted_identity(info3->sids[i].sid)) {
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continue;
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}
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status = add_sid_to_array(mem_ctx, info3->sids[i].sid,
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&sid_array, &num_sids);
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if (!NT_STATUS_IS_OK(status)) {
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struct dom_sid_buf buf;
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DEBUG(3, ("could not add SID to array: %s\n",
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dom_sid_str_buf(info3->sids[i].sid, &buf)));
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return status;
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}
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}
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*user_sids = sid_array;
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*num_user_sids = num_sids;
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return NT_STATUS_OK;
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}
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bool security_token_find_npa_flags(const struct security_token *token,
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uint32_t *_flags)
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{
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const struct dom_sid *npa_flags_sid = NULL;
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size_t num_npa_sids;
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num_npa_sids =
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security_token_count_flag_sids(token,
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&global_sid_Samba_NPA_Flags,
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1,
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&npa_flags_sid);
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if (num_npa_sids != 1) {
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return false;
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}
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sid_peek_rid(npa_flags_sid, _flags);
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return true;
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}
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void security_token_del_npa_flags(struct security_token *token)
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{
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const struct dom_sid *npa_flags_sid = NULL;
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size_t num_npa_sids;
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num_npa_sids =
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security_token_count_flag_sids(token,
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&global_sid_Samba_NPA_Flags,
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1,
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&npa_flags_sid);
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SMB_ASSERT(num_npa_sids == 1);
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del_sid_from_array(npa_flags_sid, &token->sids, &token->num_sids);
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}
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