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/*
Unix SMB/CIFS implementation.
security descriptror utility functions
Copyright (C) Andrew Tridgell 2004
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 2 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
#include "librpc/gen_ndr/ndr_security.h"
/*
return a blank security descriptor (no owners, dacl or sacl)
*/
struct security_descriptor *security_descriptor_initialise(TALLOC_CTX *mem_ctx)
{
struct security_descriptor *sd;
sd = talloc_p(mem_ctx, struct security_descriptor);
if (!sd) {
return NULL;
}
sd->revision = SD_REVISION;
/* we mark as self relative, even though it isn't while it remains
a pointer in memory because this simplifies the ndr code later.
All SDs that we store/emit are in fact SELF_RELATIVE
*/
sd->type = SEC_DESC_SELF_RELATIVE;
sd->owner_sid = NULL;
sd->group_sid = NULL;
sd->sacl = NULL;
sd->dacl = NULL;
return sd;
}
/*
talloc and copy a security descriptor
*/
struct security_descriptor *security_descriptor_copy(TALLOC_CTX *mem_ctx,
const struct security_descriptor *osd)
{
struct security_descriptor *nsd;
/* FIXME */
DEBUG(1, ("security_descriptor_copy(): sorry unimplemented yet\n"));
nsd = NULL;
return nsd;
}
/*
add an ACE to the DACL of a security_descriptor
*/
NTSTATUS security_descriptor_dacl_add(struct security_descriptor *sd,
const struct security_ace *ace)
{
if (sd->dacl == NULL) {
sd->dacl = talloc_p(sd, struct security_acl);
if (sd->dacl == NULL) {
return NT_STATUS_NO_MEMORY;
}
sd->dacl->revision = NT4_ACL_REVISION;
sd->dacl->size = 0;
sd->dacl->num_aces = 0;
sd->dacl->aces = NULL;
}
sd->dacl->aces = talloc_realloc_p(sd->dacl, sd->dacl->aces,
struct security_ace, sd->dacl->num_aces+1);
if (sd->dacl->aces == NULL) {
return NT_STATUS_NO_MEMORY;
}
sd->dacl->aces[sd->dacl->num_aces] = *ace;
sd->dacl->aces[sd->dacl->num_aces].trustee.sub_auths =
talloc_memdup(sd->dacl->aces,
sd->dacl->aces[sd->dacl->num_aces].trustee.sub_auths,
sizeof(uint32_t) *
sd->dacl->aces[sd->dacl->num_aces].trustee.num_auths);
if (sd->dacl->aces[sd->dacl->num_aces].trustee.sub_auths == NULL) {
return NT_STATUS_NO_MEMORY;
}
sd->dacl->num_aces++;
return NT_STATUS_OK;
}
/*
delete the ACE corresponding to the given trustee in the DACL of a security_descriptor
*/
NTSTATUS security_descriptor_dacl_del(struct security_descriptor *sd,
struct dom_sid *trustee)
{
int i;
if (sd->dacl == NULL) {
return NT_STATUS_OBJECT_NAME_NOT_FOUND;
}
for (i=0;i<sd->dacl->num_aces;i++) {
if (dom_sid_equal(trustee, &sd->dacl->aces[i].trustee)) {
memmove(&sd->dacl->aces[i], &sd->dacl->aces[i+1],
sizeof(sd->dacl->aces[i]) * (sd->dacl->num_aces - (i+1)));
sd->dacl->num_aces--;
if (sd->dacl->num_aces == 0) {
sd->dacl->aces = NULL;
}
return NT_STATUS_OK;
}
}
return NT_STATUS_OBJECT_NAME_NOT_FOUND;
}
/*
compare two security ace structures
*/
BOOL security_ace_equal(const struct security_ace *ace1,
const struct security_ace *ace2)
{
if (ace1 == ace2) return True;
if (!ace1 || !ace2) return False;
if (ace1->type != ace2->type) return False;
if (ace1->flags != ace2->flags) return False;
if (ace1->access_mask != ace2->access_mask) return False;
if (!dom_sid_equal(&ace1->trustee, &ace2->trustee)) return False;
return True;
}
/*
compare two security acl structures
*/
BOOL security_acl_equal(const struct security_acl *acl1,
const struct security_acl *acl2)
{
int i;
if (acl1 == acl2) return True;
if (!acl1 || !acl2) return False;
if (acl1->revision != acl2->revision) return False;
if (acl1->num_aces != acl2->num_aces) return False;
for (i=0;i<acl1->num_aces;i++) {
if (!security_ace_equal(&acl1->aces[i], &acl2->aces[i])) return False;
}
return True;
}
/*
compare two security descriptors.
*/
BOOL security_descriptor_equal(const struct security_descriptor *sd1,
const struct security_descriptor *sd2)
{
if (sd1 == sd2) return True;
if (!sd1 || !sd2) return False;
if (sd1->revision != sd2->revision) return False;
if (sd1->type != sd2->type) return False;
if (!dom_sid_equal(sd1->owner_sid, sd2->owner_sid)) return False;
if (!dom_sid_equal(sd1->group_sid, sd2->group_sid)) return False;
if (!security_acl_equal(sd1->sacl, sd2->sacl)) return False;
if (!security_acl_equal(sd1->dacl, sd2->dacl)) return False;
return True;
}
/*
compare two security descriptors, but allow certain (missing) parts
to be masked out of the comparison
*/
BOOL security_descriptor_mask_equal(const struct security_descriptor *sd1,
const struct security_descriptor *sd2,
uint32 mask)
{
if (sd1 == sd2) return True;
if (!sd1 || !sd2) return False;
if (sd1->revision != sd2->revision) return False;
if ((sd1->type & mask) != (sd2->type & mask)) return False;
if (!dom_sid_equal(sd1->owner_sid, sd2->owner_sid)) return False;
if (!dom_sid_equal(sd1->group_sid, sd2->group_sid)) return False;
if ((mask & SEC_DESC_DACL_PRESENT) && !security_acl_equal(sd1->dacl, sd2->dacl)) return False;
if ((mask & SEC_DESC_SACL_PRESENT) && !security_acl_equal(sd1->sacl, sd2->sacl)) return False;
return True;
}
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