mirror of
https://github.com/samba-team/samba.git
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8bfbb81bcd
Reviewed-by: Alexander Bokovoy <ab@samba.org>
345 lines
9.3 KiB
C
345 lines
9.3 KiB
C
/*
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Unix SMB/CIFS implementation.
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fast routines for getting the wire size of security objects
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Copyright (C) Andrew Tridgell 2003
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Copyright (C) Stefan Metzmacher 2006-2008
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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 "../libcli/security/security.h"
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/*
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return the wire size of a security_ace
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*/
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size_t ndr_size_security_ace(const struct security_ace *ace, int flags)
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{
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size_t ret;
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if (!ace) return 0;
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ret = 8 + ndr_size_dom_sid(&ace->trustee, flags);
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switch (ace->type) {
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case SEC_ACE_TYPE_ACCESS_ALLOWED_OBJECT:
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case SEC_ACE_TYPE_ACCESS_DENIED_OBJECT:
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case SEC_ACE_TYPE_SYSTEM_AUDIT_OBJECT:
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case SEC_ACE_TYPE_SYSTEM_ALARM_OBJECT:
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ret += 4; /* uint32 bitmap ace->object.object.flags */
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if (ace->object.object.flags & SEC_ACE_OBJECT_TYPE_PRESENT) {
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ret += 16; /* GUID ace->object.object.type.type */
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}
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if (ace->object.object.flags & SEC_ACE_INHERITED_OBJECT_TYPE_PRESENT) {
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ret += 16; /* GUID ace->object.object.inherited_typeinherited_type */
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}
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break;
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default:
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break;
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}
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return ret;
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}
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enum ndr_err_code ndr_pull_security_ace(struct ndr_pull *ndr, int ndr_flags, struct security_ace *r)
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{
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if (ndr_flags & NDR_SCALARS) {
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uint32_t start_ofs = ndr->offset;
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uint32_t size = 0;
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uint32_t pad = 0;
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NDR_CHECK(ndr_pull_align(ndr, 4));
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NDR_CHECK(ndr_pull_security_ace_type(ndr, NDR_SCALARS, &r->type));
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NDR_CHECK(ndr_pull_security_ace_flags(ndr, NDR_SCALARS, &r->flags));
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NDR_CHECK(ndr_pull_uint16(ndr, NDR_SCALARS, &r->size));
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NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &r->access_mask));
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NDR_CHECK(ndr_pull_set_switch_value(ndr, &r->object, r->type));
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NDR_CHECK(ndr_pull_security_ace_object_ctr(ndr, NDR_SCALARS, &r->object));
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NDR_CHECK(ndr_pull_dom_sid(ndr, NDR_SCALARS, &r->trustee));
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size = ndr->offset - start_ofs;
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if (r->size < size) {
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return ndr_pull_error(ndr, NDR_ERR_BUFSIZE,
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"ndr_pull_security_ace: r->size %u < size %u",
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(unsigned)r->size, size);
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}
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pad = r->size - size;
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NDR_PULL_NEED_BYTES(ndr, pad);
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ndr->offset += pad;
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}
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if (ndr_flags & NDR_BUFFERS) {
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NDR_CHECK(ndr_pull_security_ace_object_ctr(ndr, NDR_BUFFERS, &r->object));
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}
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return NDR_ERR_SUCCESS;
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}
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/*
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return the wire size of a security_acl
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*/
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size_t ndr_size_security_acl(const struct security_acl *theacl, int flags)
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{
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size_t ret;
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int i;
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if (!theacl) return 0;
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ret = 8;
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for (i=0;i<theacl->num_aces;i++) {
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ret += ndr_size_security_ace(&theacl->aces[i], flags);
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}
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return ret;
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}
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/*
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return the wire size of a security descriptor
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*/
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size_t ndr_size_security_descriptor(const struct security_descriptor *sd, int flags)
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{
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size_t ret;
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if (!sd) return 0;
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ret = 20;
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ret += ndr_size_dom_sid(sd->owner_sid, flags);
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ret += ndr_size_dom_sid(sd->group_sid, flags);
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ret += ndr_size_security_acl(sd->dacl, flags);
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ret += ndr_size_security_acl(sd->sacl, flags);
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return ret;
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}
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/*
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return the wire size of a dom_sid
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*/
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size_t ndr_size_dom_sid(const struct dom_sid *sid, int flags)
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{
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if (!sid) return 0;
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return 8 + 4*sid->num_auths;
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}
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size_t ndr_size_dom_sid28(const struct dom_sid *sid, int flags)
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{
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struct dom_sid zero_sid;
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if (!sid) return 0;
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ZERO_STRUCT(zero_sid);
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if (memcmp(&zero_sid, sid, sizeof(zero_sid)) == 0) {
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return 0;
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}
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return 8 + 4*sid->num_auths;
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}
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size_t ndr_size_dom_sid0(const struct dom_sid *sid, int flags)
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{
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return ndr_size_dom_sid28(sid, flags);
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}
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/*
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print a dom_sid
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*/
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void ndr_print_dom_sid(struct ndr_print *ndr, const char *name, const struct dom_sid *sid)
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{
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ndr->print(ndr, "%-25s: %s", name, dom_sid_string(ndr, sid));
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}
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void ndr_print_dom_sid2(struct ndr_print *ndr, const char *name, const struct dom_sid *sid)
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{
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ndr_print_dom_sid(ndr, name, sid);
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}
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void ndr_print_dom_sid28(struct ndr_print *ndr, const char *name, const struct dom_sid *sid)
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{
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ndr_print_dom_sid(ndr, name, sid);
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}
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void ndr_print_dom_sid0(struct ndr_print *ndr, const char *name, const struct dom_sid *sid)
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{
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ndr_print_dom_sid(ndr, name, sid);
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}
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/*
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parse a dom_sid2 - this is a dom_sid but with an extra copy of the num_auths field
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*/
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enum ndr_err_code ndr_pull_dom_sid2(struct ndr_pull *ndr, int ndr_flags, struct dom_sid *sid)
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{
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uint32_t num_auths;
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if (!(ndr_flags & NDR_SCALARS)) {
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return NDR_ERR_SUCCESS;
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}
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NDR_CHECK(ndr_pull_uint3264(ndr, NDR_SCALARS, &num_auths));
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NDR_CHECK(ndr_pull_dom_sid(ndr, ndr_flags, sid));
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if (sid->num_auths != num_auths) {
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return ndr_pull_error(ndr, NDR_ERR_ARRAY_SIZE,
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"Bad array size %u should exceed %u",
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num_auths, sid->num_auths);
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}
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return NDR_ERR_SUCCESS;
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}
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/*
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parse a dom_sid2 - this is a dom_sid but with an extra copy of the num_auths field
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*/
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enum ndr_err_code ndr_push_dom_sid2(struct ndr_push *ndr, int ndr_flags, const struct dom_sid *sid)
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{
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if (!(ndr_flags & NDR_SCALARS)) {
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return NDR_ERR_SUCCESS;
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}
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NDR_CHECK(ndr_push_uint3264(ndr, NDR_SCALARS, sid->num_auths));
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return ndr_push_dom_sid(ndr, ndr_flags, sid);
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}
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/*
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parse a dom_sid28 - this is a dom_sid in a fixed 28 byte buffer, so we need to ensure there are only upto 5 sub_auth
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*/
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enum ndr_err_code ndr_pull_dom_sid28(struct ndr_pull *ndr, int ndr_flags, struct dom_sid *sid)
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{
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enum ndr_err_code status;
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struct ndr_pull *subndr;
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if (!(ndr_flags & NDR_SCALARS)) {
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return NDR_ERR_SUCCESS;
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}
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subndr = talloc_zero(ndr, struct ndr_pull);
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NDR_ERR_HAVE_NO_MEMORY(subndr);
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subndr->flags = ndr->flags;
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subndr->current_mem_ctx = ndr->current_mem_ctx;
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subndr->data = ndr->data + ndr->offset;
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subndr->data_size = 28;
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subndr->offset = 0;
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NDR_CHECK(ndr_pull_advance(ndr, 28));
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status = ndr_pull_dom_sid(subndr, ndr_flags, sid);
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if (!NDR_ERR_CODE_IS_SUCCESS(status)) {
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/* handle a w2k bug which send random data in the buffer */
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ZERO_STRUCTP(sid);
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} else if (sid->num_auths == 0) {
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ZERO_STRUCT(sid->sub_auths);
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}
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return NDR_ERR_SUCCESS;
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}
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/*
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push a dom_sid28 - this is a dom_sid in a 28 byte fixed buffer
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*/
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enum ndr_err_code ndr_push_dom_sid28(struct ndr_push *ndr, int ndr_flags, const struct dom_sid *sid)
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{
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uint32_t old_offset;
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uint32_t padding;
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if (!(ndr_flags & NDR_SCALARS)) {
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return NDR_ERR_SUCCESS;
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}
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if (sid->num_auths > 5) {
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return ndr_push_error(ndr, NDR_ERR_RANGE,
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"dom_sid28 allows only upto 5 sub auth [%u]",
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sid->num_auths);
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}
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old_offset = ndr->offset;
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NDR_CHECK(ndr_push_dom_sid(ndr, ndr_flags, sid));
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padding = 28 - (ndr->offset - old_offset);
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if (padding > 0) {
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NDR_CHECK(ndr_push_zero(ndr, padding));
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}
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return NDR_ERR_SUCCESS;
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}
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/*
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parse a dom_sid0 - this is a dom_sid in a variable byte buffer, which is maybe empty
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*/
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enum ndr_err_code ndr_pull_dom_sid0(struct ndr_pull *ndr, int ndr_flags, struct dom_sid *sid)
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{
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if (!(ndr_flags & NDR_SCALARS)) {
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return NDR_ERR_SUCCESS;
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}
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if (ndr->data_size == ndr->offset) {
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ZERO_STRUCTP(sid);
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return NDR_ERR_SUCCESS;
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}
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return ndr_pull_dom_sid(ndr, ndr_flags, sid);
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}
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/*
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push a dom_sid0 - this is a dom_sid in a variable byte buffer, which is maybe empty
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*/
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enum ndr_err_code ndr_push_dom_sid0(struct ndr_push *ndr, int ndr_flags, const struct dom_sid *sid)
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{
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struct dom_sid zero_sid;
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if (!(ndr_flags & NDR_SCALARS)) {
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return NDR_ERR_SUCCESS;
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}
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if (!sid) {
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return NDR_ERR_SUCCESS;
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}
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ZERO_STRUCT(zero_sid);
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if (memcmp(&zero_sid, sid, sizeof(zero_sid)) == 0) {
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return NDR_ERR_SUCCESS;
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}
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return ndr_push_dom_sid(ndr, ndr_flags, sid);
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}
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_PUBLIC_ enum ndr_err_code ndr_push_dom_sid(struct ndr_push *ndr, int ndr_flags, const struct dom_sid *r)
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{
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uint32_t cntr_sub_auths_0;
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if (ndr_flags & NDR_SCALARS) {
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NDR_CHECK(ndr_push_align(ndr, 4));
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NDR_CHECK(ndr_push_uint8(ndr, NDR_SCALARS, r->sid_rev_num));
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NDR_CHECK(ndr_push_int8(ndr, NDR_SCALARS, r->num_auths));
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NDR_CHECK(ndr_push_array_uint8(ndr, NDR_SCALARS, r->id_auth, 6));
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if (r->num_auths < 0 || r->num_auths > ARRAY_SIZE(r->sub_auths)) {
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return ndr_push_error(ndr, NDR_ERR_RANGE, "value out of range");
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}
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for (cntr_sub_auths_0 = 0; cntr_sub_auths_0 < r->num_auths; cntr_sub_auths_0++) {
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NDR_CHECK(ndr_push_uint32(ndr, NDR_SCALARS, r->sub_auths[cntr_sub_auths_0]));
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}
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}
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return NDR_ERR_SUCCESS;
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}
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_PUBLIC_ enum ndr_err_code ndr_pull_dom_sid(struct ndr_pull *ndr, int ndr_flags, struct dom_sid *r)
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{
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uint32_t cntr_sub_auths_0;
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if (ndr_flags & NDR_SCALARS) {
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NDR_CHECK(ndr_pull_align(ndr, 4));
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NDR_CHECK(ndr_pull_uint8(ndr, NDR_SCALARS, &r->sid_rev_num));
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NDR_CHECK(ndr_pull_int8(ndr, NDR_SCALARS, &r->num_auths));
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if (r->num_auths < 0 || r->num_auths > ARRAY_SIZE(r->sub_auths)) {
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return ndr_pull_error(ndr, NDR_ERR_RANGE, "value out of range");
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}
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NDR_CHECK(ndr_pull_array_uint8(ndr, NDR_SCALARS, r->id_auth, 6));
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ZERO_STRUCT(r->sub_auths);
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for (cntr_sub_auths_0 = 0; cntr_sub_auths_0 < r->num_auths; cntr_sub_auths_0++) {
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NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &r->sub_auths[cntr_sub_auths_0]));
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}
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}
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return NDR_ERR_SUCCESS;
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}
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