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