diff options
Diffstat (limited to 'source4/lib/registry/reg_backend_w95')
-rw-r--r-- | source4/lib/registry/reg_backend_w95/reg_backend_w95.c | 225 |
1 files changed, 183 insertions, 42 deletions
diff --git a/source4/lib/registry/reg_backend_w95/reg_backend_w95.c b/source4/lib/registry/reg_backend_w95/reg_backend_w95.c index 8b20b830e1..0b6b6db358 100644 --- a/source4/lib/registry/reg_backend_w95/reg_backend_w95.c +++ b/source4/lib/registry/reg_backend_w95/reg_backend_w95.c @@ -26,7 +26,19 @@ * 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; @@ -54,17 +66,22 @@ typedef struct rgkn_block { 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; @@ -79,21 +96,19 @@ typedef struct rgdb_block { } 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 { @@ -103,9 +118,16 @@ 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; @@ -115,7 +137,86 @@ static DWORD str_to_dword(const char *a) { 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) { @@ -124,7 +225,7 @@ static WERROR w95_open_reg (REG_HANDLE *h, const char *location, const char *cre 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; @@ -149,7 +250,7 @@ static WERROR w95_open_reg (REG_HANDLE *h, const char *location, const char *cre 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", @@ -157,38 +258,39 @@ static WERROR w95_open_reg (REG_HANDLE *h, const char *location, const char *cre 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; } @@ -205,10 +307,49 @@ static WERROR w95_close_reg(REG_HANDLE *h) 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) |