mirror of
https://github.com/samba-team/samba.git
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dccf3f99e4
(This used to be commit 5085c53fcf
)
299 lines
6.5 KiB
C
299 lines
6.5 KiB
C
/*
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Unix SMB/CIFS implementation.
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Samba utility functions
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Copyright (C) Stefan (metze) Metzmacher 2002-2004
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Copyright (C) Andrew Tridgell 1992-2004
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Copyright (C) Jeremy Allison 1999
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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/security.h"
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#include "libcli/security/security.h"
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/*****************************************************************
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Compare the auth portion of two sids.
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*****************************************************************/
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static int dom_sid_compare_auth(const struct dom_sid *sid1, const struct dom_sid *sid2)
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{
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int i;
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if (sid1 == sid2)
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return 0;
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if (!sid1)
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return -1;
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if (!sid2)
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return 1;
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if (sid1->sid_rev_num != sid2->sid_rev_num)
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return sid1->sid_rev_num - sid2->sid_rev_num;
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for (i = 0; i < 6; i++)
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if (sid1->id_auth[i] != sid2->id_auth[i])
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return sid1->id_auth[i] - sid2->id_auth[i];
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return 0;
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}
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/*****************************************************************
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Compare two sids.
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*****************************************************************/
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static int dom_sid_compare(const struct dom_sid *sid1, const struct dom_sid *sid2)
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{
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int i;
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if (sid1 == sid2)
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return 0;
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if (!sid1)
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return -1;
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if (!sid2)
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return 1;
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/* Compare most likely different rids, first: i.e start at end */
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if (sid1->num_auths != sid2->num_auths)
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return sid1->num_auths - sid2->num_auths;
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for (i = sid1->num_auths-1; i >= 0; --i)
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if (sid1->sub_auths[i] != sid2->sub_auths[i])
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return sid1->sub_auths[i] - sid2->sub_auths[i];
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return dom_sid_compare_auth(sid1, sid2);
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}
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/*****************************************************************
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Compare two sids.
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*****************************************************************/
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bool dom_sid_equal(const struct dom_sid *sid1, const struct dom_sid *sid2)
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{
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return dom_sid_compare(sid1, sid2) == 0;
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}
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/*
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convert a string to a dom_sid, returning a talloc'd dom_sid
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*/
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struct dom_sid *dom_sid_parse_talloc(TALLOC_CTX *mem_ctx, const char *sidstr)
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{
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struct dom_sid *ret;
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uint_t rev, ia, num_sub_auths, i;
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char *p;
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if (strncasecmp(sidstr, "S-", 2)) {
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return NULL;
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}
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sidstr += 2;
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rev = strtol(sidstr, &p, 10);
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if (*p != '-') {
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return NULL;
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}
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sidstr = p+1;
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ia = strtol(sidstr, &p, 10);
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if (p == sidstr) {
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return NULL;
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}
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sidstr = p;
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num_sub_auths = 0;
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for (i=0;sidstr[i];i++) {
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if (sidstr[i] == '-') num_sub_auths++;
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}
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ret = talloc(mem_ctx, struct dom_sid);
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if (!ret) {
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return NULL;
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}
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ret->sub_auths = talloc_array(ret, uint32_t, num_sub_auths);
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if (!ret->sub_auths) {
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return NULL;
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}
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ret->sid_rev_num = rev;
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ret->id_auth[0] = 0;
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ret->id_auth[1] = 0;
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ret->id_auth[2] = ia >> 24;
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ret->id_auth[3] = ia >> 16;
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ret->id_auth[4] = ia >> 8;
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ret->id_auth[5] = ia;
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ret->num_auths = num_sub_auths;
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for (i=0;i<num_sub_auths;i++) {
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if (sidstr[0] != '-') {
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return NULL;
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}
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sidstr++;
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ret->sub_auths[i] = strtoul(sidstr, &p, 10);
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if (p == sidstr) {
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return NULL;
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}
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sidstr = p;
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}
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return ret;
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}
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/*
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copy a dom_sid structure
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*/
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struct dom_sid *dom_sid_dup(TALLOC_CTX *mem_ctx, const struct dom_sid *dom_sid)
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{
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struct dom_sid *ret;
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int i;
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if (!dom_sid) {
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return NULL;
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}
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ret = talloc(mem_ctx, struct dom_sid);
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if (!ret) {
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return NULL;
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}
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ret->sub_auths = talloc_array(ret, uint32_t, dom_sid->num_auths);
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if (!ret->sub_auths) {
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return NULL;
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}
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ret->sid_rev_num = dom_sid->sid_rev_num;
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ret->id_auth[0] = dom_sid->id_auth[0];
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ret->id_auth[1] = dom_sid->id_auth[1];
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ret->id_auth[2] = dom_sid->id_auth[2];
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ret->id_auth[3] = dom_sid->id_auth[3];
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ret->id_auth[4] = dom_sid->id_auth[4];
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ret->id_auth[5] = dom_sid->id_auth[5];
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ret->num_auths = dom_sid->num_auths;
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for (i=0;i<dom_sid->num_auths;i++) {
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ret->sub_auths[i] = dom_sid->sub_auths[i];
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}
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return ret;
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}
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/*
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add a rid to a domain dom_sid to make a full dom_sid. This function
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returns a new sid in the suppplied memory context
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*/
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struct dom_sid *dom_sid_add_rid(TALLOC_CTX *mem_ctx,
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const struct dom_sid *domain_sid,
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uint32_t rid)
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{
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struct dom_sid *sid;
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sid = talloc(mem_ctx, struct dom_sid);
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if (!sid) return NULL;
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*sid = *domain_sid;
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sid->sub_auths = talloc_array(sid, uint32_t, sid->num_auths+1);
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if (!sid->sub_auths) {
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return NULL;
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}
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memcpy(sid->sub_auths, domain_sid->sub_auths, sid->num_auths*sizeof(uint32_t));
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sid->sub_auths[sid->num_auths] = rid;
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sid->num_auths++;
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return sid;
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}
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/*
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Split up a SID into its domain and RID part
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*/
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NTSTATUS dom_sid_split_rid(TALLOC_CTX *mem_ctx, const struct dom_sid *sid,
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struct dom_sid **domain, uint32_t *rid)
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{
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if (sid->num_auths == 0) {
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return NT_STATUS_INVALID_PARAMETER;
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}
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if (domain) {
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if (!(*domain = dom_sid_dup(mem_ctx, sid))) {
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return NT_STATUS_NO_MEMORY;
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}
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(*domain)->num_auths -= 1;
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}
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if (rid) {
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*rid = sid->sub_auths[sid->num_auths - 1];
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}
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return NT_STATUS_OK;
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}
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/*
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return True if the 2nd sid is in the domain given by the first sid
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*/
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BOOL dom_sid_in_domain(const struct dom_sid *domain_sid,
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const struct dom_sid *sid)
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{
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int i;
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if (!domain_sid || !sid) {
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return False;
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}
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if (domain_sid->num_auths > sid->num_auths) {
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return False;
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}
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for (i = domain_sid->num_auths-1; i >= 0; --i) {
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if (domain_sid->sub_auths[i] != sid->sub_auths[i]) {
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return False;
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}
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}
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return dom_sid_compare_auth(domain_sid, sid) == 0;
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}
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/*
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convert a dom_sid to a string
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*/
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char *dom_sid_string(TALLOC_CTX *mem_ctx, const struct dom_sid *sid)
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{
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int i, ofs, maxlen;
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uint32_t ia;
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char *ret;
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if (!sid) {
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return talloc_strdup(mem_ctx, "(NULL SID)");
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}
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maxlen = sid->num_auths * 11 + 25;
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ret = talloc_array(mem_ctx, char, maxlen);
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if (!ret) return talloc_strdup(mem_ctx, "(SID ERR)");
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ia = (sid->id_auth[5]) +
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(sid->id_auth[4] << 8 ) +
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(sid->id_auth[3] << 16) +
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(sid->id_auth[2] << 24);
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ofs = snprintf(ret, maxlen, "S-%u-%lu",
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(unsigned int)sid->sid_rev_num, (unsigned long)ia);
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for (i = 0; i < sid->num_auths; i++) {
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ofs += snprintf(ret + ofs, maxlen - ofs, "-%lu", (unsigned long)sid->sub_auths[i]);
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}
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return ret;
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}
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