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 after the
  88  \'s are converted to /'s.  Key string is also normalized to UPPER
  89  case.
  90 **********************************************************************/
  91
  92 char *normalize_reg_path(TALLOC_CTX *ctx, const char *keyname )
  93 {
  94         char *nkeyname = talloc_string_sub(ctx, keyname, "\\", "/");
  95         if (!nkeyname) {
  96                 return NULL;
  97         }
  98         strupper_m(nkeyname);
  99         return nkeyname;
 100 }
 101
 102 /**
 103  * normalize ther registry path in place.
 104  */
 105 void normalize_dbkey(char *key)
 106 {
 107         size_t len = strlen(key);
 108         string_sub(key, "\\", "/", len+1);
 109         strupper_m(key);
 110 }
 111
 112 /**********************************************************************
 113  move to next non-delimter character
 114 *********************************************************************/
 115
 116 char *reg_remaining_path(TALLOC_CTX *ctx, const char *key)
 117 {
 118         char *new_path = NULL;
 119         char *p = NULL;
 120
 121         if (!key || !*key) {
 122                 return NULL;
 123         }
 124
 125         new_path = talloc_strdup(ctx, key);
 126         if (!new_path) {
 127                 return NULL;
 128         }
 129         /* normalize_reg_path( new_path ); */
 130         if (!(p = strchr(new_path, '\\')) ) {
 131                 if (!(p = strchr( new_path, '/'))) {
 132                         p = new_path;
 133                 } else {
 134                         p++;
 135                 }
 136         } else {
 137                 p++;
 138         }
 139
 140         return p;
 141 }
 142
 143 /**********************************************************************
 144 *********************************************************************/
 145
 146 int regval_convert_multi_sz( uint16 *multi_string, size_t byte_len, char ***values )
 147 {
 148         char **sz;
 149         int i;
 150         int num_strings = 0;
 151         fstring buffer;
 152         uint16 *wp;
 153         size_t multi_len = byte_len / 2;
 154
 155         if ( !multi_string || !values )
 156                 return 0;
 157
 158         *values = NULL;
 159
 160         /* just count the NULLs */
 161
 162         for ( i=0; (i<multi_len-1) && !(multi_string[i]==0x0 && multi_string[i+1]==0x0); i++ ) {
 163                 /* peek ahead */
 164                 if ( multi_string[i+1] == 0x0 )
 165                         num_strings++;
 166         }
 167
 168         if ( num_strings == 0 )
 169                 return 0;
 170
 171         if ( !(sz = TALLOC_ARRAY( NULL, char*, num_strings+1 )) ) {
 172                 DEBUG(0,("reg_convert_multi_sz: talloc() failed!\n"));
 173                 return -1;
 174         }
 175
 176         wp = multi_string;
 177
 178         for ( i=0; i<num_strings; i++ ) {
 179                 rpcstr_pull( buffer, wp, sizeof(buffer), -1, STR_TERMINATE );
 180                 sz[i] = talloc_strdup( sz, buffer );
 181
 182                 /* skip to the next string NULL and then one more */
 183                 while ( *wp )
 184                         wp++;
 185                 wp++;
 186         }
 187
 188         /* tag the array off with an empty string */
 189         sz[i] = '\0';
 190
 191         *values = sz;
 192
 193         return num_strings;
 194 }
 195
 196 /**********************************************************************
 197  Returns number of bytes, not number of unicode characters
 198 *********************************************************************/
 199
 200 size_t regval_build_multi_sz( char **values, uint16 **buffer )
 201 {
 202         int i;
 203         size_t buf_size = 0;
 204         uint16 *buf, *b;
 205         UNISTR2 sz;
 206
 207         if ( !values || !buffer )
 208                 return 0;
 209
 210         /* go ahead and alloc some space */
 211
 212         if ( !(buf = TALLOC_ARRAY( NULL, uint16, 2 )) ) {
 213                 DEBUG(0,("regval_build_multi_sz: talloc() failed!\n"));
 214                 return 0;
 215         }
 216
 217         for ( i=0; values[i]; i++ ) {
 218                 ZERO_STRUCT( sz );
 219                 /* DEBUG(0,("regval_build_multi_sz: building [%s]\n",values[i])); */
 220                 init_unistr2( &sz, values[i], UNI_STR_TERMINATE );
 221
 222                 /* Alloc some more memory.  Always add one one to account for the
 223                    double NULL termination */
 224
 225                 b = TALLOC_REALLOC_ARRAY( NULL, buf, uint16, buf_size+sz.uni_str_len+1 );
 226                 if ( !b ) {
 227                         DEBUG(0,("regval_build_multi_sz: talloc() reallocation error!\n"));
 228                         TALLOC_FREE( buffer );
 229                         return 0;
 230                 }
 231                 buf = b;
 232
 233                 /* copy the unistring2 buffer and increment the size */
 234                 /* dump_data(1,sz.buffer,sz.uni_str_len*2); */
 235                 memcpy( buf+buf_size, sz.buffer, sz.uni_str_len*2 );
 236                 buf_size += sz.uni_str_len;
 237
 238                 /* cleanup rather than leaving memory hanging around */
 239                 TALLOC_FREE( sz.buffer );
 240         }
 241
 242         buf[buf_size++] = 0x0;
 243
 244         *buffer = buf;
 245
 246         /* return number of bytes */
 247         return buf_size*2;
 248 }