source/librpc/ndr/ndr_sec_helper.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    fast routines for getting the wire size of security objects
   5
   6    Copyright (C) Andrew Tridgell 2003
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22
  23 #include "includes.h"
  24
  25 /*
  26   return the wire size of a dom_sid
  27 */
  28 size_t ndr_size_dom_sid(const struct dom_sid *sid, int flags)
  29 {
  30         if (!sid) return 0;
  31         return 8 + 4*sid->num_auths;
  32 }
  33
  34 size_t ndr_size_dom_sid28(const struct dom_sid *sid, int flags)
  35 {
  36         struct dom_sid zero_sid;
  37
  38         if (!sid) return 0;
  39
  40         ZERO_STRUCT(zero_sid);
  41
  42         if (memcmp(&zero_sid, sid, sizeof(zero_sid)) == 0) {
  43                 return 0;
  44         }
  45
  46         return 8 + 4*sid->num_auths;
  47 }
  48
  49 size_t ndr_size_dom_sid0(const struct dom_sid *sid, int flags)
  50 {
  51         return ndr_size_dom_sid28(sid, flags);
  52 }
  53
  54 enum ndr_err_code ndr_pull_security_ace(struct ndr_pull *ndr, int ndr_flags, struct security_ace *r)
  55 {
  56         if (ndr_flags & NDR_SCALARS) {
  57                 uint32_t start_ofs = ndr->offset;
  58                 uint32_t size = 0;
  59                 uint32_t pad = 0;
  60                 NDR_CHECK(ndr_pull_align(ndr, 4));
  61                 NDR_CHECK(ndr_pull_security_ace_type(ndr, NDR_SCALARS, &r->type));
  62                 NDR_CHECK(ndr_pull_security_ace_flags(ndr, NDR_SCALARS, &r->flags));
  63                 NDR_CHECK(ndr_pull_uint16(ndr, NDR_SCALARS, &r->size));
  64                 NDR_CHECK(ndr_pull_uint32(ndr, NDR_SCALARS, &r->access_mask));
  65                 NDR_CHECK(ndr_pull_set_switch_value(ndr, &r->object, r->type));
  66                 NDR_CHECK(ndr_pull_security_ace_object_ctr(ndr, NDR_SCALARS, &r->object));
  67                 NDR_CHECK(ndr_pull_dom_sid(ndr, NDR_SCALARS, &r->trustee));
  68                 size = ndr->offset - start_ofs;
  69                 if (r->size < size) {
  70                         return ndr_pull_error(ndr, NDR_ERR_BUFSIZE,
  71                                               "ndr_pull_security_ace: r->size %u < size %u",
  72                                               (unsigned)r->size, size);
  73                 }
  74                 pad = r->size - size;
  75                 NDR_PULL_NEED_BYTES(ndr, pad);
  76                 ndr->offset += pad;
  77         }
  78         if (ndr_flags & NDR_BUFFERS) {
  79                 NDR_CHECK(ndr_pull_security_ace_object_ctr(ndr, NDR_BUFFERS, &r->object));
  80         }
  81         return NDR_ERR_SUCCESS;
  82 }
  83
  84 /*
  85   return the wire size of a security_ace
  86 */
  87 size_t ndr_size_security_ace(const struct security_ace *ace, int flags)
  88 {
  89         if (!ace) return 0;
  90         return 8 + ndr_size_dom_sid(&ace->trustee, flags);
  91 }
  92
  93
  94 /*
  95   return the wire size of a security_acl
  96 */
  97 size_t ndr_size_security_acl(const struct security_acl *acl, int flags)
  98 {
  99         size_t ret;
 100         int i;
 101         if (!acl) return 0;
 102         ret = 8;
 103         for (i=0;i<acl->num_aces;i++) {
 104                 ret += ndr_size_security_ace(&acl->aces[i], flags);
 105         }
 106         return ret;
 107 }
 108
 109 /*
 110   return the wire size of a security descriptor
 111 */
 112 size_t ndr_size_security_descriptor(const struct security_descriptor *sd, int flags)
 113 {
 114         size_t ret;
 115         if (!sd) return 0;
 116
 117         ret = 20;
 118         ret += ndr_size_dom_sid(sd->owner_sid, flags);
 119         ret += ndr_size_dom_sid(sd->group_sid, flags);
 120         ret += ndr_size_security_acl(sd->dacl, flags);
 121         ret += ndr_size_security_acl(sd->sacl, flags);
 122         return ret;
 123 }
 124
 125 /*
 126   print a dom_sid
 127 */
 128 void ndr_print_dom_sid(struct ndr_print *ndr, const char *name, const struct dom_sid *sid)
 129 {
 130         ndr->print(ndr, "%-25s: %s", name, dom_sid_string(ndr, sid));
 131 }
 132
 133 void ndr_print_dom_sid2(struct ndr_print *ndr, const char *name, const struct dom_sid *sid)
 134 {
 135         ndr_print_dom_sid(ndr, name, sid);
 136 }
 137
 138 void ndr_print_dom_sid28(struct ndr_print *ndr, const char *name, const struct dom_sid *sid)
 139 {
 140         ndr_print_dom_sid(ndr, name, sid);
 141 }
 142
 143 void ndr_print_dom_sid0(struct ndr_print *ndr, const char *name, const struct dom_sid *sid)
 144 {
 145         ndr_print_dom_sid(ndr, name, sid);
 146 }
 147