release/src/router/samba3/source/include/regfio.h

   1 /*
   2  * Unix SMB/CIFS implementation.
   3  * Windows NT registry I/O library
   4  * Copyright (c) Gerald (Jerry) Carter               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 2 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, write to the Free Software
  18  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19  */
  20
  21 /************************************************************
  22  * Most of this information was obtained from
  23  * http://www.wednesday.demon.co.uk/dosreg.html
  24  * Thanks Nigel!
  25  ***********************************************************/
  26
  27
  28 #ifndef _REGFIO_H
  29 #define _REGFIO_H
  30
  31 /* Macros */
  32
  33 #define REGF_BLOCKSIZE          0x1000
  34 #define REGF_ALLOC_BLOCK        0x1000
  35
  36 /* header sizes for various records */
  37
  38 #define REGF_HDR_SIZE           4
  39 #define HBIN_HDR_SIZE           4
  40 #define HBIN_HEADER_REC_SIZE    0x24
  41 #define REC_HDR_SIZE            2
  42
  43 #define REGF_OFFSET_NONE        0xffffffff
  44
  45 /* Flags for the vk records */
  46
  47 #define VK_FLAG_NAME_PRESENT    0x0001
  48 #define VK_DATA_IN_OFFSET       0x80000000
  49
  50 /* NK record macros */
  51
  52 #define NK_TYPE_LINKKEY         0x0010
  53 #define NK_TYPE_NORMALKEY       0x0020
  54 #define NK_TYPE_ROOTKEY         0x002c
  55
  56 #define HBIN_STORE_REF(x, y)    { x->hbin = y; y->ref_count++ };
  57 #define HBIN_REMOVE_REF(x, y)   { x->hbin = NULL; y->ref_count-- /* if the count == 0; we can clean up */ };
  58
  59
  60 /* HBIN block */
  61 struct regf_hbin;
  62 typedef struct regf_hbin {
  63         struct regf_hbin *prev, *next;
  64         uint32 file_off;                /* my offset in the registry file */
  65         uint32 free_off;                /* offset to free space within the hbin record */
  66         uint32 free_size;               /* amount of data left in the block */
  67         int ref_count;                  /* how many active records are pointing to this block (not used currently) */
  68
  69         char   header[HBIN_HDR_SIZE];   /* "hbin" */
  70         uint32 first_hbin_off;          /* offset from first hbin block */
  71         uint32 block_size;              /* block size of this blockually a multiple of 4096Kb) */
  72
  73         prs_struct ps;                  /* data */
  74
  75         BOOL dirty;                     /* has this hbin block been modified? */
  76 } REGF_HBIN;
  77
  78 /* ??? List -- list of key offsets and hashed names for consistency */
  79
  80 typedef struct {
  81         uint32 nk_off;
  82         uint8 keycheck[sizeof(uint32)];
  83         char *fullname;
  84 } REGF_HASH_REC;
  85
  86 typedef struct {
  87         REGF_HBIN *hbin;        /* pointer to HBIN record (in memory) containing this nk record */
  88         uint32 hbin_off;        /* offset from beginning of this hbin block */
  89         uint32 rec_size;        /* ((start_offset - end_offset) & 0xfffffff8) */
  90
  91         char header[REC_HDR_SIZE];
  92         uint16 num_keys;
  93         REGF_HASH_REC *hashes;
  94 } REGF_LF_REC;
  95
  96 /* Key Value */
  97
  98 typedef struct {
  99         REGF_HBIN *hbin;        /* pointer to HBIN record (in memory) containing this nk record */
 100         uint32 hbin_off;        /* offset from beginning of this hbin block */
 101         uint32 rec_size;        /* ((start_offset - end_offset) & 0xfffffff8) */
 102         uint32 rec_off;         /* offset stored in the value list */
 103
 104         char header[REC_HDR_SIZE];
 105         char *valuename;
 106         uint32 data_size;
 107         uint32 data_off;
 108         uint8  *data;
 109         uint32 type;
 110         uint16 flag;
 111 } REGF_VK_REC;
 112
 113
 114 /* Key Security */
 115 struct _regf_sk_rec;
 116
 117 typedef struct _regf_sk_rec {
 118         struct _regf_sk_rec *next, *prev;
 119         REGF_HBIN *hbin;        /* pointer to HBIN record (in memory) containing this nk record */
 120         uint32 hbin_off;        /* offset from beginning of this hbin block */
 121         uint32 rec_size;        /* ((start_offset - end_offset) & 0xfffffff8) */
 122
 123         uint32 sk_off;          /* offset parsed from NK record used as a key
 124                                    to lookup reference to this SK record */
 125
 126         char header[REC_HDR_SIZE];
 127         uint32 prev_sk_off;
 128         uint32 next_sk_off;
 129         uint32 ref_count;
 130         uint32 size;
 131         SEC_DESC *sec_desc;
 132 } REGF_SK_REC;
 133
 134 /* Key Name */
 135
 136 typedef struct {
 137         REGF_HBIN *hbin;        /* pointer to HBIN record (in memory) containing this nk record */
 138         uint32 hbin_off;        /* offset from beginning of this hbin block */
 139         uint32 subkey_index;    /* index to next subkey record to return */
 140         uint32 rec_size;        /* ((start_offset - end_offset) & 0xfffffff8) */
 141
 142         /* header information */
 143
 144         char header[REC_HDR_SIZE];
 145         uint16 key_type;
 146         NTTIME mtime;
 147         uint32 parent_off;      /* back pointer in registry hive */
 148         uint32 classname_off;
 149         char *classname;
 150         char *keyname;
 151
 152         /* max lengths */
 153
 154         uint32 max_bytes_subkeyname;            /* max subkey name * 2 */
 155         uint32 max_bytes_subkeyclassname;       /* max subkey classname length (as if) */
 156         uint32 max_bytes_valuename;             /* max valuename * 2 */
 157         uint32 max_bytes_value;                 /* max value data size */
 158
 159         /* unknowns */
 160
 161         uint32 unk_index;                       /* nigel says run time index ? */
 162
 163         /* children */
 164
 165         uint32 num_subkeys;
 166         uint32 subkeys_off;     /* hash records that point to NK records */
 167         uint32 num_values;
 168         uint32 values_off;      /* value lists which point to VK records */
 169         uint32 sk_off;          /* offset to SK record */
 170
 171         /* link in the other records here */
 172
 173         REGF_LF_REC subkeys;
 174         REGF_VK_REC *values;
 175         REGF_SK_REC *sec_desc;
 176
 177 } REGF_NK_REC;
 178
 179 /* REGF block */
 180
 181 typedef struct {
 182         /* run time information */
 183
 184         int fd;                         /* file descriptor */
 185         int open_flags;                 /* flags passed to the open() call */
 186         TALLOC_CTX *mem_ctx;            /* memory context for run-time file access information */
 187         REGF_HBIN *block_list;          /* list of open hbin blocks */
 188
 189         /* file format information */
 190
 191         char   header[REGF_HDR_SIZE];   /* "regf" */
 192         uint32 data_offset;             /* offset to record in the first (or any?) hbin block */
 193         uint32 last_block;              /* offset to last hbin block in file */
 194         uint32 checksum;                /* XOR of bytes 0x0000 - 0x01FB */
 195         NTTIME mtime;
 196
 197         REGF_SK_REC *sec_desc_list;     /* list of security descriptors referenced by NK records */
 198
 199         /* unknowns used to simply writing */
 200
 201         uint32 unknown1;
 202         uint32 unknown2;
 203         uint32 unknown3;
 204         uint32 unknown4;
 205         uint32 unknown5;
 206         uint32 unknown6;
 207
 208 } REGF_FILE;
 209
 210 /* Function Declarations */
 211
 212 REGF_FILE*    regfio_open( const char *filename, int flags, int mode );
 213 int           regfio_close( REGF_FILE *r );
 214
 215 REGF_NK_REC*  regfio_rootkey( REGF_FILE *file );
 216 REGF_NK_REC*  regfio_fetch_subkey( REGF_FILE *file, REGF_NK_REC *nk );
 217 REGF_NK_REC*  regfio_write_key ( REGF_FILE *file, const char *name,
 218                                  REGVAL_CTR *values, REGSUBKEY_CTR *subkeys,
 219                                  SEC_DESC *sec_desc, REGF_NK_REC *parent );
 220
 221
 222 #endif  /* _REGFIO_H */
 223