source/registry/reg_util.c

   1 /*
   2  *  Unix SMB/CIFS implementation.
   3  *  Virtual Windows Registry Layer (utility functions)
   4  *  Copyright (C) Gerald Carter                     2002-2005
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 3 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 /* Implementation of registry frontend view functions. */
  21
  22 #include "includes.h"
  23
  24 #undef DBGC_CLASS
  25 #define DBGC_CLASS DBGC_REGISTRY
  26
  27 /***********************************************************************
  28  Utility function for splitting the base path of a registry path off
  29  by setting base and new_path to the apprapriate offsets withing the
  30  path.
  31
  32  WARNING!!  Does modify the original string!
  33  ***********************************************************************/
  34
  35 bool reg_split_path(char *path, char **base, char **new_path)
  36 {
  37         char *p;
  38
  39         *new_path = *base = NULL;
  40
  41         if (!path) {
  42                 return false;
  43         }
  44         *base = path;
  45
  46         p = strchr(path, '\\');
  47
  48         if ( p ) {
  49                 *p = '\0';
  50                 *new_path = p+1;
  51         }
  52
  53         return true;
  54 }
  55
  56 /***********************************************************************
  57  Utility function for splitting the base path of a registry path off
  58  by setting base and new_path to the appropriate offsets withing the
  59  path.
  60
  61  WARNING!!  Does modify the original string!
  62  ***********************************************************************/
  63
  64 bool reg_split_key(char *path, char **base, char **key)
  65 {
  66         char *p;
  67
  68         *key = *base = NULL;
  69
  70         if (!path) {
  71                 return false;
  72         }
  73
  74         *base = path;
  75
  76         p = strrchr(path, '\\');
  77
  78         if (p) {
  79                 *p = '\0';
  80                 *key = p+1;
  81         }
  82
  83         return true;
  84 }
  85
  86 /**
  87  * The full path to the registry key is used as database key
  88  * after the \'s are converted to /'s.
  89  * Leading and trailing '/' and '\' characters are stripped.
  90  * Key string is also normalized to UPPER case.
  91  */
  92
  93 char *normalize_reg_path(TALLOC_CTX *ctx, const char *keyname )
  94 {
  95         char *p;
  96         char *nkeyname;
  97
  98         /* skip leading '/' and '\' chars */
  99         p = (char *)keyname;
 100         while ((*p == '/') || (*p == '\\')) {
 101                 p++;
 102         }
 103
 104         nkeyname = talloc_string_sub(ctx, p, "\\", "/");
 105         if (nkeyname == NULL) {
 106                 return NULL;
 107         }
 108
 109         /* strip trailing '/' chars */
 110         p = strrchr(nkeyname, '/');
 111         while ((p != NULL) && (p[1] == '\0')) {
 112                 *p = '\0';
 113                 p = strrchr(nkeyname, '/');
 114         }
 115
 116         strupper_m(nkeyname);
 117
 118         return nkeyname;
 119 }
 120
 121 /**
 122  * normalize ther registry path in place.
 123  */
 124 void normalize_dbkey(char *key)
 125 {
 126         size_t len = strlen(key);
 127         string_sub(key, "\\", "/", len+1);
 128         strupper_m(key);
 129 }
 130
 131 /**********************************************************************
 132  move to next non-delimter character
 133 *********************************************************************/
 134
 135 char *reg_remaining_path(TALLOC_CTX *ctx, const char *key)
 136 {
 137         char *new_path = NULL;
 138         char *p = NULL;
 139
 140         if (!key || !*key) {
 141                 return NULL;
 142         }
 143
 144         new_path = talloc_strdup(ctx, key);
 145         if (!new_path) {
 146                 return NULL;
 147         }
 148         /* normalize_reg_path( new_path ); */
 149         if (!(p = strchr(new_path, '\\')) ) {
 150                 if (!(p = strchr( new_path, '/'))) {
 151                         p = new_path;
 152                 } else {
 153                         p++;
 154                 }
 155         } else {
 156                 p++;
 157         }
 158
 159         return p;
 160 }
 161
 162 /**********************************************************************
 163 *********************************************************************/
 164
 165 int regval_convert_multi_sz( uint16 *multi_string, size_t byte_len, char ***values )
 166 {
 167         char **sz;
 168         int i;
 169         int num_strings = 0;
 170         fstring buffer;
 171         uint16 *wp;
 172         size_t multi_len = byte_len / 2;
 173
 174         if ( !multi_string || !values )
 175                 return 0;
 176
 177         *values = NULL;
 178
 179         /* just count the NULLs */
 180
 181         for ( i=0; (i<multi_len-1) && !(multi_string[i]==0x0 && multi_string[i+1]==0x0); i++ ) {
 182                 /* peek ahead */
 183                 if ( multi_string[i+1] == 0x0 )
 184                         num_strings++;
 185         }
 186
 187         if ( num_strings == 0 )
 188                 return 0;
 189
 190         if ( !(sz = TALLOC_ARRAY( NULL, char*, num_strings+1 )) ) {
 191                 DEBUG(0,("reg_convert_multi_sz: talloc() failed!\n"));
 192                 return -1;
 193         }
 194
 195         wp = multi_string;
 196
 197         for ( i=0; i<num_strings; i++ ) {
 198                 rpcstr_pull( buffer, wp, sizeof(buffer), -1, STR_TERMINATE );
 199                 sz[i] = talloc_strdup( sz, buffer );
 200
 201                 /* skip to the next string NULL and then one more */
 202                 while ( *wp )
 203                         wp++;
 204                 wp++;
 205         }
 206
 207         /* tag the array off with an empty string */
 208         sz[i] = '\0';
 209
 210         *values = sz;
 211
 212         return num_strings;
 213 }
 214
 215 /**********************************************************************
 216  Returns number of bytes, not number of unicode characters
 217 *********************************************************************/
 218
 219 size_t regval_build_multi_sz( char **values, uint16 **buffer )
 220 {
 221         int i;
 222         size_t buf_size = 0;
 223         uint16 *buf, *b;
 224         UNISTR2 sz;
 225
 226         if ( !values || !buffer )
 227                 return 0;
 228
 229         /* go ahead and alloc some space */
 230
 231         if ( !(buf = TALLOC_ARRAY( NULL, uint16, 2 )) ) {
 232                 DEBUG(0,("regval_build_multi_sz: talloc() failed!\n"));
 233                 return 0;
 234         }
 235
 236         for ( i=0; values[i]; i++ ) {
 237                 ZERO_STRUCT( sz );
 238                 /* DEBUG(0,("regval_build_multi_sz: building [%s]\n",values[i])); */
 239                 init_unistr2( &sz, values[i], UNI_STR_TERMINATE );
 240
 241                 /* Alloc some more memory.  Always add one one to account for the
 242                    double NULL termination */
 243
 244                 b = TALLOC_REALLOC_ARRAY( NULL, buf, uint16, buf_size+sz.uni_str_len+1 );
 245                 if ( !b ) {
 246                         DEBUG(0,("regval_build_multi_sz: talloc() reallocation error!\n"));
 247                         TALLOC_FREE( buffer );
 248                         return 0;
 249                 }
 250                 buf = b;
 251
 252                 /* copy the unistring2 buffer and increment the size */
 253                 /* dump_data(1,sz.buffer,sz.uni_str_len*2); */
 254                 memcpy( buf+buf_size, sz.buffer, sz.uni_str_len*2 );
 255                 buf_size += sz.uni_str_len;
 256
 257                 /* cleanup rather than leaving memory hanging around */
 258                 TALLOC_FREE( sz.buffer );
 259         }
 260
 261         buf[buf_size++] = 0x0;
 262
 263         *buffer = buf;
 264
 265         /* return number of bytes */
 266         return buf_size*2;
 267 }