* The registry starts with a header that contains pointers to
* the rgdb.
*
- * After the main header follows the RGKN header (key index table) */
+ * After the main header follows the RGKN header (key index table).
+ * The RGKN keys are listed after each other. They are put into
+ * blocks, the first having a length of 0x2000 bytes, the others
+ * being 0x1000 bytes long.
+ *
+ * After the RGKN header follow one or more RGDB blocks. These blocks
+ * contain keys. A key is followed by its name and its values.
+ *
+ * Values are followed by their name and then their data.
+ *
+ * Basically the idea is that the RGKN contains the associations between
+ * the keys and the RGDB contains the actual data.
+ */
typedef unsigned int DWORD;
typedef unsigned short WORD;
DWORD uk2;
} RGKN_HDR;
-typedef struct rgkn_key {
- DWORD type;
- DWORD hash;
- DWORD next_free;
- DWORD parent;
- DWORD child;
- DWORD next;
+typedef struct reg_id {
WORD id;
WORD rgdb;
+} REG_ID;
+
+typedef struct rgkn_key {
+ DWORD type; /* 0x00000000 = normal key, 0x80000000 = free block */
+ DWORD hash; /* Contains either hash or size of free blocks that follows */
+ DWORD next_free;
+ DWORD parent_offset;
+ DWORD first_child_offset;
+ DWORD next_offset;
+ REG_ID id;
} RGKN_KEY;
+
typedef struct rgdb_block {
DWORD RGDB_ID; /* RGDB */
DWORD size;
} RGDB_HDR;
typedef struct rgdb_key {
- DWORD type;
- DWORD hash;
- DWORD next_free;
- DWORD parent;
- DWORD child;
- DWORD next;
- WORD id;
- WORD rgdb;
+ DWORD size;
+ REG_ID id;
+ DWORD used_size;
+ WORD name_len;
+ WORD num_values;
+ DWORD uk1;
} RGDB_KEY;
typedef struct rgdb_value {
DWORD type;
DWORD uk1;
- DWORD name_len;
- DWORD data_len;
+ WORD name_len;
+ WORD data_len;
} RGDB_VALUE;
typedef struct creg_struct_s {
struct stat sbuf;
CREG_HDR *creg_hdr;
RGKN_HDR *rgkn_hdr;
- char *rgkn;
+ RGDB_KEY ***rgdb_keys;
} CREG;
+#define RGKN_START_SIZE 0x2000
+#define RGKN_INC_SIZE 0x1000
+
+#define LOCN_RGKN(creg, o) ((RGKN_KEY *)((creg)->base + sizeof(CREG_HDR) + o))
+#define LOCN_RGDB_BLOCK(creg, o) (((creg)->base + (creg)->creg_hdr->rgdb_offset + o))
+#define LOCN_RGDB_KEY(creg, rgdb, id) ((RGDB_KEY *)((creg)->rgdb_keys[(rgdb)][(id)]))
+
static DWORD str_to_dword(const char *a) {
int i;
unsigned long ret = 0;
return ret;
}
-#define LOCN(creg, o) (((creg)->base + sizeof(CREG_HDR) + o))
+static DWORD calc_hash(const char *str) {
+ DWORD ret = 0;
+ int i;
+ for(i = 0; str[i] && str[i] != '\\'; i++) {
+ ret+=toupper(str[i]);
+ }
+ return ret;
+}
+
+static void parse_rgkn_block(CREG *creg, off_t start_off, off_t end_off)
+{
+ off_t i;
+ for(i = start_off; end_off - i > sizeof(RGKN_KEY); i+= sizeof(RGKN_KEY)) {
+ RGKN_KEY *key = (RGKN_KEY *)LOCN_RGKN(creg, i);
+ if(key->type == 0) {
+ DEBUG(4,("Regular, id: %d, %d, parent: %x, firstchild: %x, next: %x hash: %lX\n", key->id.id, key->id.rgdb, key->parent_offset, key->first_child_offset, key->next_offset, key->hash));
+ } else if(key->type == 0x80000000) {
+ DEBUG(3,("free\n"));
+ i += key->hash;
+ } else {
+ DEBUG(0,("Invalid key type in RGKN: %0X\n", key->type));
+ }
+ }
+}
+
+static void parse_rgdb_block(CREG *creg, RGDB_HDR *rgdb_hdr)
+{
+ DWORD used_size = rgdb_hdr->size - rgdb_hdr->unused_size;
+ DWORD offset = 0;
+
+ while(offset < used_size) {
+ RGDB_KEY *key = (RGDB_KEY *)(((char *)rgdb_hdr) + sizeof(RGDB_HDR) + offset);
+
+ if(!(key->id.id == 0xFFFF && key->id.rgdb == 0xFFFF))creg->rgdb_keys[key->id.rgdb][key->id.id] = key;
+ offset += key->size;
+ }
+}
+
+static WERROR w95_open_root (REG_HANDLE *h, REG_KEY **key)
+{
+ CREG *creg = h->backend_data;
+
+ /* First element in rgkn should be root key */
+ *key = reg_key_new_abs("\\", h, LOCN_RGKN(creg, sizeof(RGKN_HDR)));
+
+ return WERR_OK;
+}
+
+static WERROR w95_get_subkey_by_index (REG_KEY *parent, int n, REG_KEY **key)
+{
+ CREG *creg = parent->handle->backend_data;
+ RGKN_KEY *rgkn_key = parent->backend_data;
+ RGKN_KEY *child;
+ DWORD child_offset;
+ DWORD cur = 0;
+
+ /* Get id of first child */
+ child_offset = rgkn_key->first_child_offset;
+
+ while(child_offset != 0xFFFFFFFF) {
+ child = LOCN_RGKN(creg, child_offset);
+
+ /* n == cur ? return! */
+ if(cur == n) {
+ RGDB_KEY *rgdb_key;
+ char *name;
+ rgdb_key = LOCN_RGDB_KEY(creg, child->id.rgdb, child->id.id);
+ name = strndup((char *)rgdb_key + sizeof(RGDB_KEY), rgdb_key->name_len);
+ *key = reg_key_new_rel(name, parent, child);
+ SAFE_FREE(name);
+ return WERR_OK;
+ }
+
+ cur++;
+
+ child_offset = child->next_offset;
+ }
+
+ return WERR_NO_MORE_ITEMS;
+}
static WERROR w95_open_reg (REG_HANDLE *h, const char *location, const char *credentials)
{
memset(creg, 0, sizeof(CREG));
h->backend_data = creg;
DWORD i, nfree = 0;
- DWORD offset;
+ DWORD offset, end_offset;
if((creg->fd = open(location, O_RDONLY, 0000)) < 0) {
return WERR_FOOBAR;
return WERR_FOOBAR;
}
- creg->rgkn_hdr = (RGKN_HDR *)LOCN(creg, 0);
+ creg->rgkn_hdr = (RGKN_HDR *)LOCN_RGKN(creg, 0);
if ((rgkn_id = IVAL(&creg->rgkn_hdr->RGKN_ID,0)) != str_to_dword("RGKN")) {
DEBUG(0, ("Unrecognized Windows 95 registry key index id: 0x%0X, %s\n",
return WERR_FOOBAR;
}
-#if 0
- for(i = 0; i < creg->rgkn_hdr->size; i+=sizeof(RGKN_KEY)) {
- RGKN_KEY *key = (RGKN_KEY *)LOCN(creg, sizeof(RGKN_HDR) + i);
- if(nfree > 0) {
- nfree--;
- } else if(key->type == 0) {
- DEBUG(0,("Not used\n"));
- /* Not used */
- } else if(key->type == 0x80000000) {
- DEBUG(0,("Regular key\n"));
- /* Regular key */
- } else {
- DEBUG(0,("Invalid key type in RGKN: %0X\n", key->type));
- }
- }
+#if 0
+ /* If'ed out because we only need to parse this stuff when allocating new
+ * entries (which we don't do at the moment */
+ /* First parse the 0x2000 long block */
+ parse_rgkn_block(creg, sizeof(RGKN_HDR), 0x2000);
- curpos += creg->rgkn_hdr->size + sizeof(RGKN_HDR);
+ /* Then parse the other 0x1000 length blocks */
+ for(offset = 0x2000; offset < creg->rgkn_hdr->size; offset+=0x1000) {
+ parse_rgkn_block(creg, offset, offset+0x1000);
+ }
#endif
- offset = creg->rgkn_hdr->size;
- DEBUG(0, ("Reading %d rgdb entries\n", creg->creg_hdr->num_rgdb));
+ creg->rgdb_keys = talloc_array_p(h->mem_ctx, RGDB_KEY **, creg->creg_hdr->num_rgdb);
+
+ offset = 0;
+ DEBUG(3, ("Reading %d rgdb entries\n", creg->creg_hdr->num_rgdb));
for(i = 0; i < creg->creg_hdr->num_rgdb; i++) {
- RGDB_HDR *rgdb_hdr = (RGDB_HDR *)LOCN(creg, offset);
+ RGDB_HDR *rgdb_hdr = (RGDB_HDR *)LOCN_RGDB_BLOCK(creg, offset);
if(strncmp((char *)&(rgdb_hdr->RGDB_ID), "RGDB", 4)) {
DEBUG(0, ("unrecognized rgdb entry: %4s, %s\n",
&rgdb_hdr->RGDB_ID, location));
return WERR_FOOBAR;
} else {
- DEBUG(0, ("Valid rgdb entry\n"));
+ DEBUG(3, ("Valid rgdb entry, first free id: %d, max id: %d\n", rgdb_hdr->first_free_id, rgdb_hdr->max_id));
}
+
+ creg->rgdb_keys[i] = talloc_array_p(h->mem_ctx, RGDB_KEY *, rgdb_hdr->max_id+1);
+ memset(creg->rgdb_keys[i], 0, sizeof(RGDB_KEY *) * (rgdb_hdr->max_id+1));
+
+ parse_rgdb_block(creg, rgdb_hdr);
+
offset+=rgdb_hdr->size;
}
return WERR_OK;
}
+
+static WERROR w95_fetch_values(REG_KEY *k, int *count, REG_VAL ***values)
+{
+ RGKN_KEY *rgkn_key = k->backend_data;
+ RGDB_VALUE *val;
+ DWORD i;
+ DWORD offset = 0;
+ RGDB_KEY *rgdb_key = LOCN_RGDB_KEY((CREG *)k->handle->backend_data, rgkn_key->id.rgdb, rgkn_key->id.id);
+
+ if(!rgdb_key) return WERR_FOOBAR;
+
+ *count = rgdb_key->num_values;
+
+ if((*count) == 0) return WERR_OK;
+
+ (*values) = talloc_array_p(k->mem_ctx, REG_VAL *, (*count)+1);
+ for(i = 0; i < rgdb_key->num_values; i++) {
+ RGDB_VALUE *val = (RGDB_VALUE *)(((char *)rgdb_key) + sizeof(RGDB_KEY) + rgdb_key->name_len + offset);
+ (*values)[i] = reg_val_new(k, val);
+
+ /* Name */
+ (*values)[i]->name = talloc_strndup(k->mem_ctx, (char *)val+sizeof(RGDB_VALUE), val->name_len);
+
+ /* Value */
+ (*values)[i]->data_len = val->data_len;
+ (*values)[i]->data_blk = talloc_memdup((*values)[i]->mem_ctx, (char *)val+sizeof(RGDB_VALUE)+val->name_len, val->data_len);
+
+ /* Type */
+ (*values)[i]->data_type = val->type;
+
+ offset+=sizeof(RGDB_VALUE) + val->name_len + val->data_len;
+ }
+
+ return WERR_OK;
+}
+
static struct registry_ops reg_backend_w95 = {
.name = "w95",
.open_registry = w95_open_reg,
.close_registry = w95_close_reg,
+ .open_root_key = w95_open_root,
+ .fetch_values = w95_fetch_values,
+ .get_subkey_by_index = w95_get_subkey_by_index,
};
NTSTATUS reg_w95_init(void)
git.samba.org / kai / samba.git / commitdiff