source3/registry/reg_util_marshalling.c

   1 /*
   2  * Unix SMB/CIFS implementation.
   3  * Registry helper routines
   4  * Copyright (C) Volker Lendecke 2006
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the Free
   8  * Software Foundation; either version 3 of the License, or (at your option)
   9  * any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  14  * more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along with
  17  * this program; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include "includes.h"
  21 #include "registry.h"
  22
  23 #undef DBGC_CLASS
  24 #define DBGC_CLASS DBGC_REGISTRY
  25
  26 WERROR registry_pull_value(TALLOC_CTX *mem_ctx,
  27                            struct registry_value **pvalue,
  28                            enum winreg_Type type, uint8 *data,
  29                            uint32 size, uint32 length)
  30 {
  31         struct registry_value *value;
  32         WERROR err;
  33
  34         if (!(value = TALLOC_ZERO_P(mem_ctx, struct registry_value))) {
  35                 return WERR_NOMEM;
  36         }
  37
  38         value->type = type;
  39
  40         switch (type) {
  41         case REG_DWORD:
  42         case REG_DWORD_BIG_ENDIAN:
  43                 if ((size != 4) || (length != 4)) {
  44                         err = WERR_INVALID_PARAM;
  45                         goto error;
  46                 }
  47                 value->v.dword = IVAL(data, 0);
  48                 break;
  49         case REG_QWORD:
  50                 if ((size != 8) || (length != 8)) {
  51                         err = WERR_INVALID_PARAM;
  52                         goto error;
  53                 }
  54                 value->v.qword = BVAL(data, 0);
  55                 break;
  56         case REG_SZ:
  57         case REG_EXPAND_SZ:
  58         {
  59                 /*
  60                  * Make sure we get a NULL terminated string for
  61                  * convert_string_talloc().
  62                  */
  63
  64                 smb_ucs2_t *tmp;
  65
  66                 if (length == 1) {
  67                         /* win2k regedit gives us a string of 1 byte when
  68                          * creating a new value of type REG_SZ. this workaround
  69                          * replaces the input by using the same string as
  70                          * winxp delivers. */
  71                         length = 2;
  72                         if (!(tmp = SMB_MALLOC_ARRAY(smb_ucs2_t, 2))) {
  73                                 err = WERR_NOMEM;
  74                                 goto error;
  75                         }
  76                         tmp[0] = 0;
  77                         tmp[1] = 0;
  78                         DEBUG(10, ("got REG_SZ value of length 1 - workaround "
  79                                    "activated.\n"));
  80                 }
  81                 else if ((length % 2) != 0) {
  82                         err = WERR_INVALID_PARAM;
  83                         goto error;
  84                 }
  85                 else {
  86                         uint32 num_ucs2 = length / 2;
  87                         if (!(tmp = SMB_MALLOC_ARRAY(smb_ucs2_t, num_ucs2+1))) {
  88                                 err = WERR_NOMEM;
  89                                 goto error;
  90                         }
  91
  92                         memcpy((void *)tmp, (const void *)data, length);
  93                         tmp[num_ucs2] = 0;
  94                 }
  95                 if (length + 2 < length) {
  96                         /* Integer wrap. */
  97                         SAFE_FREE(tmp);
  98                         err = WERR_INVALID_PARAM;
  99                         goto error;
 100                 }
 101
 102                 if (!convert_string_talloc(value, CH_UTF16LE, CH_UNIX, tmp,
 103                                            length+2, (void *)&value->v.sz.str,
 104                                            &value->v.sz.len, False)) {
 105                         SAFE_FREE(tmp);
 106                         err = WERR_INVALID_PARAM;
 107                         goto error;
 108                 }
 109
 110                 SAFE_FREE(tmp);
 111                 break;
 112         }
 113         case REG_MULTI_SZ: {
 114                 int i;
 115                 const char **vals;
 116                 DATA_BLOB blob;
 117
 118                 blob = data_blob_const(data, length);
 119
 120                 if (!pull_reg_multi_sz(mem_ctx, &blob, &vals)) {
 121                         err = WERR_NOMEM;
 122                         goto error;
 123                 }
 124
 125                 for (i=0; vals[i]; i++) {
 126                         ;;
 127                 }
 128
 129                 value->v.multi_sz.num_strings = i;
 130                 value->v.multi_sz.strings = (char **)vals;
 131
 132                 break;
 133         }
 134         case REG_BINARY:
 135                 value->v.binary = data_blob_talloc(mem_ctx, data, length);
 136                 break;
 137         default:
 138                 err = WERR_INVALID_PARAM;
 139                 goto error;
 140         }
 141
 142         *pvalue = value;
 143         return WERR_OK;
 144
 145  error:
 146         TALLOC_FREE(value);
 147         return err;
 148 }
 149
 150 WERROR registry_push_value(TALLOC_CTX *mem_ctx,
 151                            const struct registry_value *value,
 152                            DATA_BLOB *presult)
 153 {
 154         switch (value->type) {
 155         case REG_DWORD:
 156         case REG_DWORD_BIG_ENDIAN: {
 157                 char buf[4];
 158                 SIVAL(buf, 0, value->v.dword);
 159                 *presult = data_blob_talloc(mem_ctx, (void *)buf, 4);
 160                 if (presult->data == NULL) {
 161                         return WERR_NOMEM;
 162                 }
 163                 break;
 164         }
 165         case REG_QWORD: {
 166                 char buf[8];
 167                 SBVAL(buf, 0, value->v.qword);
 168                 *presult = data_blob_talloc(mem_ctx, (void *)buf, 8);
 169                 if (presult->data == NULL) {
 170                         return WERR_NOMEM;
 171                 }
 172                 break;
 173         }
 174         case REG_SZ:
 175         case REG_EXPAND_SZ: {
 176                 if (!push_reg_sz(mem_ctx, presult, value->v.sz.str))
 177                 {
 178                         return WERR_NOMEM;
 179                 }
 180                 break;
 181         }
 182         case REG_MULTI_SZ: {
 183                 /* handle the case where we don't get a NULL terminated array */
 184                 const char **array;
 185                 int i;
 186
 187                 array = talloc_array(mem_ctx, const char *,
 188                                      value->v.multi_sz.num_strings + 1);
 189                 if (!array) {
 190                         return WERR_NOMEM;
 191                 }
 192
 193                 for (i=0; i < value->v.multi_sz.num_strings; i++) {
 194                         array[i] = value->v.multi_sz.strings[i];
 195                 }
 196                 array[i] = NULL;
 197
 198                 if (!push_reg_multi_sz(mem_ctx, presult, array)) {
 199                         talloc_free(array);
 200                         return WERR_NOMEM;
 201                 }
 202                 talloc_free(array);
 203                 break;
 204         }
 205         case REG_BINARY:
 206                 *presult = data_blob_talloc(mem_ctx,
 207                                             value->v.binary.data,
 208                                             value->v.binary.length);
 209                 break;
 210         default:
 211                 return WERR_INVALID_PARAM;
 212         }
 213
 214         return WERR_OK;
 215 }