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samba-mirror/source3/registry/regfio.c
Andreas Schneider 8abda0a134 s3:registry: Use correct integer sizes
Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
2024-07-08 07:36:32 +00:00

1998 lines
53 KiB
C

/*
* Unix SMB/CIFS implementation.
* Windows NT registry I/O library
* Copyright (c) Gerald (Jerry) Carter 2005
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "system/filesys.h"
#include "regfio.h"
#include "../librpc/gen_ndr/ndr_security.h"
#include "../libcli/security/security_descriptor.h"
#include "../libcli/security/secdesc.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_REGISTRY
/*******************************************************************
*
* TODO : Right now this code basically ignores classnames.
*
******************************************************************/
#if defined(PARANOID_MALLOC_CHECKER)
#define PRS_ALLOC_MEM(ps, type, count) (type *)prs_alloc_mem_((ps),sizeof(type),(count))
#else
#define PRS_ALLOC_MEM(ps, type, count) (type *)prs_alloc_mem((ps),sizeof(type),(count))
#endif
/*******************************************************************
Reads or writes an NTTIME structure.
********************************************************************/
static bool smb_io_time(const char *desc, NTTIME *nttime, prs_struct *ps, int depth)
{
uint32_t low, high;
if (nttime == NULL)
return False;
prs_debug(ps, depth, desc, "smb_io_time");
depth++;
if(!prs_align(ps))
return False;
if (MARSHALLING(ps)) {
low = *nttime & 0xFFFFFFFF;
high = *nttime >> 32;
}
if(!prs_uint32("low ", ps, depth, &low)) /* low part */
return False;
if(!prs_uint32("high", ps, depth, &high)) /* high part */
return False;
if (UNMARSHALLING(ps)) {
*nttime = (((uint64_t)high << 32) + low);
}
return True;
}
/*******************************************************************
*******************************************************************/
static int write_block( REGF_FILE *file, prs_struct *ps, uint32_t offset )
{
int bytes_written, returned;
char *buffer = prs_data_p( ps );
uint32_t buffer_size = prs_data_size( ps );
SMB_STRUCT_STAT sbuf;
if ( file->fd == -1 )
return -1;
/* check for end of file */
if (sys_fstat(file->fd, &sbuf, false)) {
DEBUG(0,("write_block: stat() failed! (%s)\n", strerror(errno)));
return -1;
}
if ( lseek( file->fd, offset, SEEK_SET ) == -1 ) {
DEBUG(0,("write_block: lseek() failed! (%s)\n", strerror(errno) ));
return -1;
}
bytes_written = returned = 0;
while ( bytes_written < buffer_size ) {
if ( (returned = write( file->fd, buffer+bytes_written, buffer_size-bytes_written )) == -1 ) {
DEBUG(0,("write_block: write() failed! (%s)\n", strerror(errno) ));
return False;
}
bytes_written += returned;
}
return bytes_written;
}
/*******************************************************************
*******************************************************************/
static int read_block( REGF_FILE *file, prs_struct *ps, uint32_t file_offset, uint32_t block_size )
{
ssize_t bytes_read, returned;
char *buffer;
SMB_STRUCT_STAT sbuf;
/* check for end of file */
if (sys_fstat(file->fd, &sbuf, false)) {
DEBUG(0,("read_block: stat() failed! (%s)\n", strerror(errno)));
return -1;
}
if ( (size_t)file_offset >= sbuf.st_ex_size )
return -1;
/* if block_size == 0, we are parsing HBIN records and need
to read some of the header to get the block_size from there */
if ( block_size == 0 ) {
char hdr[0x20];
if ( lseek( file->fd, file_offset, SEEK_SET ) == -1 ) {
DEBUG(0,("read_block: lseek() failed! (%s)\n", strerror(errno) ));
return -1;
}
returned = read( file->fd, hdr, 0x20 );
if ( (returned == -1) || (returned < 0x20) ) {
DEBUG(0,("read_block: failed to read in HBIN header. Is the file corrupt?\n"));
return -1;
}
/* make sure this is an hbin header */
if ( strncmp( hdr, "hbin", HBIN_HDR_SIZE ) != 0 ) {
DEBUG(0,("read_block: invalid block header!\n"));
return -1;
}
block_size = IVAL( hdr, 0x08 );
}
DEBUG(10,("read_block: block_size == 0x%x\n", block_size ));
/* set the offset, initialize the buffer, and read the block from disk */
if ( lseek( file->fd, file_offset, SEEK_SET ) == -1 ) {
DEBUG(0,("read_block: lseek() failed! (%s)\n", strerror(errno) ));
return -1;
}
if (!prs_init( ps, block_size, file->mem_ctx, UNMARSHALL )) {
DEBUG(0,("read_block: prs_init() failed! (%s)\n", strerror(errno) ));
return -1;
}
buffer = prs_data_p( ps );
bytes_read = returned = 0;
while ( bytes_read < block_size ) {
if ( (returned = read( file->fd, buffer+bytes_read, block_size-bytes_read )) == -1 ) {
DEBUG(0,("read_block: read() failed (%s)\n", strerror(errno) ));
return False;
}
if ( (returned == 0) && (bytes_read < block_size) ) {
DEBUG(0,("read_block: not a valid registry file ?\n" ));
return False;
}
if (returned < 0 || bytes_read > SSIZE_MAX - returned) {
DBG_ERR("Integer overflow\n");
return false;
}
bytes_read += returned;
}
return bytes_read;
}
/*******************************************************************
*******************************************************************/
static bool write_hbin_block( REGF_FILE *file, REGF_HBIN *hbin )
{
if ( !hbin->dirty )
return True;
/* write free space record if any is available */
if ( hbin->free_off != REGF_OFFSET_NONE ) {
uint32_t header = 0xffffffff;
if ( !prs_set_offset( &hbin->ps, hbin->free_off-sizeof(uint32_t) ) )
return False;
if ( !prs_uint32( "free_size", &hbin->ps, 0, &hbin->free_size ) )
return False;
if ( !prs_uint32( "free_header", &hbin->ps, 0, &header ) )
return False;
}
hbin->dirty = (write_block( file, &hbin->ps, hbin->file_off ) != -1);
return hbin->dirty;
}
/*******************************************************************
*******************************************************************/
static bool hbin_block_close( REGF_FILE *file, REGF_HBIN *hbin )
{
REGF_HBIN *p;
/* remove the block from the open list and flush it to disk */
for ( p=file->block_list; p && p!=hbin; p=p->next )
;
if ( p == hbin ) {
DLIST_REMOVE( file->block_list, hbin );
}
else
DEBUG(0,("hbin_block_close: block not in open list!\n"));
if ( !write_hbin_block( file, hbin ) )
return False;
return True;
}
/*******************************************************************
*******************************************************************/
static bool prs_regf_block( const char *desc, prs_struct *ps, int depth, REGF_FILE *file )
{
prs_debug(ps, depth, desc, "prs_regf_block");
depth++;
if ( !prs_uint8s( True, "header", ps, depth, (uint8_t *)file->header, sizeof( file->header )) )
return False;
/* yes, these values are always identical so store them only once */
if ( !prs_uint32( "unknown1", ps, depth, &file->unknown1 ))
return False;
if ( !prs_uint32( "unknown1 (again)", ps, depth, &file->unknown1 ))
return False;
/* get the modtime */
if ( !prs_set_offset( ps, 0x0c ) )
return False;
if ( !smb_io_time( "modtime", &file->mtime, ps, depth ) )
return False;
/* constants */
if ( !prs_uint32( "unknown2", ps, depth, &file->unknown2 ))
return False;
if ( !prs_uint32( "unknown3", ps, depth, &file->unknown3 ))
return False;
if ( !prs_uint32( "unknown4", ps, depth, &file->unknown4 ))
return False;
if ( !prs_uint32( "unknown5", ps, depth, &file->unknown5 ))
return False;
/* get file offsets */
if ( !prs_set_offset( ps, 0x24 ) )
return False;
if ( !prs_uint32( "data_offset", ps, depth, &file->data_offset ))
return False;
if ( !prs_uint32( "last_block", ps, depth, &file->last_block ))
return False;
/* one more constant */
if ( !prs_uint32( "unknown6", ps, depth, &file->unknown6 ))
return False;
/* get the checksum */
if ( !prs_set_offset( ps, 0x01fc ) )
return False;
if ( !prs_uint32( "checksum", ps, depth, &file->checksum ))
return False;
return True;
}
/*******************************************************************
*******************************************************************/
static bool prs_hbin_block( const char *desc, prs_struct *ps, int depth, REGF_HBIN *hbin )
{
uint32_t block_size2;
prs_debug(ps, depth, desc, "prs_hbin_block");
depth++;
if ( !prs_uint8s( True, "header", ps, depth, (uint8_t*)hbin->header, sizeof( hbin->header )) )
return False;
if ( !prs_uint32( "first_hbin_off", ps, depth, &hbin->first_hbin_off ))
return False;
/* The dosreg.cpp comments say that the block size is at 0x1c.
According to a WINXP NTUSER.dat file, this is wrong. The block_size
is at 0x08 */
if ( !prs_uint32( "block_size", ps, depth, &hbin->block_size ))
return False;
block_size2 = hbin->block_size;
prs_set_offset( ps, 0x1c );
if ( !prs_uint32( "block_size2", ps, depth, &block_size2 ))
return False;
if ( MARSHALLING(ps) )
hbin->dirty = True;
return True;
}
/*******************************************************************
*******************************************************************/
static bool prs_nk_rec( const char *desc, prs_struct *ps, int depth, REGF_NK_REC *nk )
{
uint16_t class_length, name_length;
uint32_t start;
uint32_t data_size, start_off, end_off;
uint32_t unknown_off = REGF_OFFSET_NONE;
nk->hbin_off = prs_offset( ps );
start = nk->hbin_off;
prs_debug(ps, depth, desc, "prs_nk_rec");
depth++;
/* back up and get the data_size */
if ( !prs_set_offset( ps, prs_offset(ps)-sizeof(uint32_t)) )
return False;
start_off = prs_offset( ps );
if ( !prs_uint32( "rec_size", ps, depth, &nk->rec_size ))
return False;
if ( !prs_uint8s( True, "header", ps, depth, (uint8_t *)nk->header, sizeof( nk->header )) )
return False;
if ( !prs_uint16( "key_type", ps, depth, &nk->key_type ))
return False;
if ( !smb_io_time( "mtime", &nk->mtime, ps, depth ))
return False;
if ( !prs_set_offset( ps, start+0x0010 ) )
return False;
if ( !prs_uint32( "parent_off", ps, depth, &nk->parent_off ))
return False;
if ( !prs_uint32( "num_subkeys", ps, depth, &nk->num_subkeys ))
return False;
if ( !prs_set_offset( ps, start+0x001c ) )
return False;
if ( !prs_uint32( "subkeys_off", ps, depth, &nk->subkeys_off ))
return False;
if ( !prs_uint32( "unknown_off", ps, depth, &unknown_off) )
return False;
if ( !prs_set_offset( ps, start+0x0024 ) )
return False;
if ( !prs_uint32( "num_values", ps, depth, &nk->num_values ))
return False;
if ( !prs_uint32( "values_off", ps, depth, &nk->values_off ))
return False;
if ( !prs_uint32( "sk_off", ps, depth, &nk->sk_off ))
return False;
if ( !prs_uint32( "classname_off", ps, depth, &nk->classname_off ))
return False;
if ( !prs_uint32( "max_bytes_subkeyname", ps, depth, &nk->max_bytes_subkeyname))
return False;
if ( !prs_uint32( "max_bytes_subkeyclassname", ps, depth, &nk->max_bytes_subkeyclassname))
return False;
if ( !prs_uint32( "max_bytes_valuename", ps, depth, &nk->max_bytes_valuename))
return False;
if ( !prs_uint32( "max_bytes_value", ps, depth, &nk->max_bytes_value))
return False;
if ( !prs_uint32( "unknown index", ps, depth, &nk->unk_index))
return False;
name_length = nk->keyname ? strlen(nk->keyname) : 0 ;
class_length = nk->classname ? strlen(nk->classname) : 0 ;
if ( !prs_uint16( "name_length", ps, depth, &name_length ))
return False;
if ( !prs_uint16( "class_length", ps, depth, &class_length ))
return False;
if ( class_length ) {
;;
}
if ( name_length ) {
if ( UNMARSHALLING(ps) ) {
if ( !(nk->keyname = PRS_ALLOC_MEM( ps, char, name_length+1 )) )
return False;
}
if ( !prs_uint8s( True, "name", ps, depth, (uint8_t *)nk->keyname, name_length) )
return False;
if ( UNMARSHALLING(ps) )
nk->keyname[name_length] = '\0';
}
end_off = prs_offset( ps );
/* data_size must be divisible by 8 and large enough to hold the original record */
data_size = ((start_off - end_off) & 0xfffffff8 );
if ( data_size > nk->rec_size )
DEBUG(10,("Encountered reused record (0x%x < 0x%x)\n", data_size, nk->rec_size));
if ( MARSHALLING(ps) )
nk->hbin->dirty = True;
return True;
}
/*******************************************************************
*******************************************************************/
static uint32_t regf_block_checksum( prs_struct *ps )
{
char *buffer = prs_data_p( ps );
uint32_t checksum, x;
int i;
/* XOR of all bytes 0x0000 - 0x01FB */
checksum = x = 0;
for ( i=0; i<0x01FB; i+=4 ) {
x = IVAL(buffer, i );
checksum ^= x;
}
return checksum;
}
/*******************************************************************
*******************************************************************/
static bool read_regf_block( REGF_FILE *file )
{
prs_struct ps;
uint32_t checksum;
/* grab the first block from the file */
if ( read_block( file, &ps, 0, REGF_BLOCKSIZE ) == -1 )
return False;
/* parse the block and verify the checksum */
if ( !prs_regf_block( "regf_header", &ps, 0, file ) )
return False;
checksum = regf_block_checksum( &ps );
prs_mem_free( &ps );
if ( file->checksum != checksum && !file->ignore_checksums) {
DEBUG(0,("read_regf_block: invalid checksum\n" ));
return False;
}
return True;
}
/*******************************************************************
*******************************************************************/
static REGF_HBIN* read_hbin_block( REGF_FILE *file, off_t offset )
{
REGF_HBIN *hbin;
uint32_t record_size, curr_off, block_size, header;
if ( !(hbin = talloc_zero(file->mem_ctx, REGF_HBIN)) )
return NULL;
hbin->file_off = offset;
hbin->free_off = -1;
if ( read_block( file, &hbin->ps, offset, 0 ) == -1 )
return NULL;
if ( !prs_hbin_block( "hbin", &hbin->ps, 0, hbin ) )
return NULL;
/* this should be the same thing as hbin->block_size but just in case */
block_size = prs_data_size( &hbin->ps );
/* Find the available free space offset. Always at the end,
so walk the record list and stop when you get to the end.
The end is defined by a record header of 0xffffffff. The
previous 4 bytes contains the amount of free space remaining
in the hbin block. */
/* remember that the record_size is in the 4 bytes preceding the record itself */
if ( !prs_set_offset( &hbin->ps, file->data_offset+HBIN_HDR_SIZE-sizeof(uint32_t) ) )
return NULL;
record_size = 0;
header = 0;
curr_off = prs_offset( &hbin->ps );
while ( header != 0xffffffff ) {
/* not done yet so reset the current offset to the
next record_size field */
curr_off = curr_off+record_size;
/* for some reason the record_size of the last record in
an hbin block can extend past the end of the block
even though the record fits within the remaining
space....aaarrrgggghhhhhh */
if ( curr_off >= block_size ) {
record_size = -1;
curr_off = -1;
break;
}
if ( !prs_set_offset( &hbin->ps, curr_off) )
return NULL;
if ( !prs_uint32( "rec_size", &hbin->ps, 0, &record_size ) )
return NULL;
if ( !prs_uint32( "header", &hbin->ps, 0, &header ) )
return NULL;
if (record_size == 0)
return NULL;
if ( record_size & 0x80000000 ) {
/* absolute_value(record_size) */
record_size = (record_size ^ 0xffffffff) + 1;
}
}
/* save the free space offset */
if ( header == 0xffffffff ) {
/* account for the fact that the curr_off is 4 bytes behind the actual
record header */
hbin->free_off = curr_off + sizeof(uint32_t);
hbin->free_size = record_size;
}
DEBUG(10,("read_hbin_block: free space offset == 0x%x\n", hbin->free_off));
if ( !prs_set_offset( &hbin->ps, file->data_offset+HBIN_HDR_SIZE ) )
return NULL;
return hbin;
}
/*******************************************************************
Input a random offset and receive the corresponding HBIN
block for it
*******************************************************************/
static bool hbin_contains_offset( REGF_HBIN *hbin, uint32_t offset )
{
if ( !hbin )
return False;
if ( (offset > hbin->first_hbin_off) && (offset < (hbin->first_hbin_off+hbin->block_size)) )
return True;
return False;
}
/*******************************************************************
Input a random offset and receive the corresponding HBIN
block for it
*******************************************************************/
static REGF_HBIN* lookup_hbin_block( REGF_FILE *file, uint32_t offset )
{
REGF_HBIN *hbin = NULL;
uint32_t block_off;
/* start with the open list */
for ( hbin=file->block_list; hbin; hbin=hbin->next ) {
DEBUG(10,("lookup_hbin_block: address = 0x%x [0x%lx]\n", hbin->file_off, (unsigned long)hbin ));
if ( hbin_contains_offset( hbin, offset ) )
return hbin;
}
if ( !hbin ) {
/* start at the beginning */
block_off = REGF_BLOCKSIZE;
do {
/* cleanup before the next round */
if ( hbin )
prs_mem_free( &hbin->ps );
hbin = read_hbin_block( file, block_off );
if ( hbin )
block_off = hbin->file_off + hbin->block_size;
} while ( hbin && !hbin_contains_offset( hbin, offset ) );
}
if ( hbin )
DLIST_ADD( file->block_list, hbin );
return hbin;
}
/*******************************************************************
*******************************************************************/
static bool prs_hash_rec( const char *desc, prs_struct *ps, int depth, REGF_HASH_REC *hash )
{
prs_debug(ps, depth, desc, "prs_hash_rec");
depth++;
if ( !prs_uint32( "nk_off", ps, depth, &hash->nk_off ))
return False;
if ( !prs_uint8s( True, "keycheck", ps, depth, hash->keycheck, sizeof( hash->keycheck )) )
return False;
return True;
}
/*******************************************************************
*******************************************************************/
static bool hbin_prs_lf_records( const char *desc, REGF_HBIN *hbin, int depth, REGF_NK_REC *nk )
{
int i;
REGF_LF_REC *lf = &nk->subkeys;
uint32_t data_size, start_off, end_off;
prs_debug(&hbin->ps, depth, desc, "prs_lf_records");
depth++;
/* check if we have anything to do first */
if ( nk->num_subkeys == 0 )
return True;
/* move to the LF record */
if ( !prs_set_offset( &hbin->ps, nk->subkeys_off + HBIN_HDR_SIZE - hbin->first_hbin_off ) )
return False;
/* backup and get the data_size */
if ( !prs_set_offset( &hbin->ps, prs_offset(&hbin->ps)-sizeof(uint32_t)) )
return False;
start_off = prs_offset( &hbin->ps );
if ( !prs_uint32( "rec_size", &hbin->ps, depth, &lf->rec_size ))
return False;
if ( !prs_uint8s( True, "header", &hbin->ps, depth, (uint8_t *)lf->header, sizeof( lf->header )) )
return False;
if ( !prs_uint16( "num_keys", &hbin->ps, depth, &lf->num_keys))
return False;
if ( UNMARSHALLING(&hbin->ps) ) {
if (lf->num_keys) {
if ( !(lf->hashes = PRS_ALLOC_MEM( &hbin->ps, REGF_HASH_REC, lf->num_keys )) )
return False;
} else {
lf->hashes = NULL;
}
}
for ( i=0; i<lf->num_keys; i++ ) {
if ( !prs_hash_rec( "hash_rec", &hbin->ps, depth, &lf->hashes[i] ) )
return False;
}
end_off = prs_offset( &hbin->ps );
/* data_size must be divisible by 8 and large enough to hold the original record */
data_size = ((start_off - end_off) & 0xfffffff8 );
if ( data_size > lf->rec_size )
DEBUG(10,("Encountered reused record (0x%x < 0x%x)\n", data_size, lf->rec_size));
if ( MARSHALLING(&hbin->ps) )
hbin->dirty = True;
return True;
}
/*******************************************************************
*******************************************************************/
static bool hbin_prs_sk_rec( const char *desc, REGF_HBIN *hbin, int depth, REGF_SK_REC *sk )
{
prs_struct *ps = &hbin->ps;
uint16_t tag = 0xFFFF;
uint32_t data_size, start_off, end_off;
prs_debug(ps, depth, desc, "hbin_prs_sk_rec");
depth++;
if ( !prs_set_offset( &hbin->ps, sk->sk_off + HBIN_HDR_SIZE - hbin->first_hbin_off ) )
return False;
/* backup and get the data_size */
if ( !prs_set_offset( &hbin->ps, prs_offset(&hbin->ps)-sizeof(uint32_t)) )
return False;
start_off = prs_offset( &hbin->ps );
if ( !prs_uint32( "rec_size", &hbin->ps, depth, &sk->rec_size ))
return False;
if ( !prs_uint8s( True, "header", ps, depth, (uint8_t *)sk->header, sizeof( sk->header )) )
return False;
if ( !prs_uint16( "tag", ps, depth, &tag))
return False;
if ( !prs_uint32( "prev_sk_off", ps, depth, &sk->prev_sk_off))
return False;
if ( !prs_uint32( "next_sk_off", ps, depth, &sk->next_sk_off))
return False;
if ( !prs_uint32( "ref_count", ps, depth, &sk->ref_count))
return False;
if ( !prs_uint32( "size", ps, depth, &sk->size))
return False;
{
NTSTATUS status;
TALLOC_CTX *mem_ctx = prs_get_mem_context(&hbin->ps);
DATA_BLOB blob;
if (MARSHALLING(&hbin->ps)) {
status = marshall_sec_desc(mem_ctx,
sk->sec_desc,
&blob.data, &blob.length);
if (!NT_STATUS_IS_OK(status))
return False;
if (!prs_copy_data_in(&hbin->ps, (const char *)blob.data, blob.length))
return False;
} else {
blob = data_blob_const(
prs_data_p(&hbin->ps) + prs_offset(&hbin->ps),
prs_data_size(&hbin->ps) - prs_offset(&hbin->ps)
);
status = unmarshall_sec_desc(mem_ctx,
blob.data, blob.length,
&sk->sec_desc);
if (!NT_STATUS_IS_OK(status))
return False;
prs_set_offset(&hbin->ps, blob.length);
}
}
end_off = prs_offset( &hbin->ps );
/* data_size must be divisible by 8 and large enough to hold the original record */
data_size = ((start_off - end_off) & 0xfffffff8 );
if ( data_size > sk->rec_size )
DEBUG(10,("Encountered reused record (0x%x < 0x%x)\n", data_size, sk->rec_size));
if ( MARSHALLING(&hbin->ps) )
hbin->dirty = True;
return True;
}
/*******************************************************************
*******************************************************************/
static bool hbin_prs_vk_rec( const char *desc, REGF_HBIN *hbin, int depth, REGF_VK_REC *vk, REGF_FILE *file )
{
uint32_t offset;
uint16_t name_length;
prs_struct *ps = &hbin->ps;
uint32_t data_size, start_off, end_off;
prs_debug(ps, depth, desc, "prs_vk_rec");
depth++;
/* backup and get the data_size */
if ( !prs_set_offset( &hbin->ps, prs_offset(&hbin->ps)-sizeof(uint32_t)) )
return False;
start_off = prs_offset( &hbin->ps );
if ( !prs_uint32( "rec_size", &hbin->ps, depth, &vk->rec_size ))
return False;
if ( !prs_uint8s( True, "header", ps, depth, (uint8_t *)vk->header, sizeof( vk->header )) )
return False;
if ( MARSHALLING(&hbin->ps) )
name_length = strlen(vk->valuename);
if ( !prs_uint16( "name_length", ps, depth, &name_length ))
return False;
if ( !prs_uint32( "data_size", ps, depth, &vk->data_size ))
return False;
if ( !prs_uint32( "data_off", ps, depth, &vk->data_off ))
return False;
if ( !prs_uint32( "type", ps, depth, &vk->type))
return False;
if ( !prs_uint16( "flag", ps, depth, &vk->flag))
return False;
offset = prs_offset( ps );
offset += 2; /* skip 2 bytes */
prs_set_offset( ps, offset );
/* get the name */
if ( vk->flag&VK_FLAG_NAME_PRESENT ) {
if ( UNMARSHALLING(&hbin->ps) ) {
if ( !(vk->valuename = PRS_ALLOC_MEM( ps, char, name_length+1 )))
return False;
}
if ( !prs_uint8s( True, "name", ps, depth, (uint8_t *)vk->valuename, name_length ) )
return False;
}
end_off = prs_offset( &hbin->ps );
/* get the data if necessary */
if ( vk->data_size != 0 ) {
bool charmode = False;
if ( (vk->type == REG_SZ) || (vk->type == REG_MULTI_SZ) )
charmode = True;
/* the data is stored in the offset if the size <= 4 */
if ( !(vk->data_size & VK_DATA_IN_OFFSET) ) {
REGF_HBIN *hblock = hbin;
uint32_t data_rec_size;
if ( UNMARSHALLING(&hbin->ps) ) {
if ( !(vk->data = PRS_ALLOC_MEM( ps, uint8_t, vk->data_size) ) )
return False;
}
/* this data can be in another hbin */
if ( !hbin_contains_offset( hbin, vk->data_off ) ) {
if ( !(hblock = lookup_hbin_block( file, vk->data_off )) )
return False;
}
if ( !(prs_set_offset( &hblock->ps, (vk->data_off+HBIN_HDR_SIZE-hblock->first_hbin_off)-sizeof(uint32_t) )) )
return False;
if ( MARSHALLING(&hblock->ps) ) {
data_rec_size = ( (vk->data_size+sizeof(uint32_t)) & 0xfffffff8 ) + 8;
data_rec_size = ( data_rec_size - 1 ) ^ 0xFFFFFFFF;
}
if ( !prs_uint32( "data_rec_size", &hblock->ps, depth, &data_rec_size ))
return False;
if ( !prs_uint8s( charmode, "data", &hblock->ps, depth, vk->data, vk->data_size) )
return False;
if ( MARSHALLING(&hblock->ps) )
hblock->dirty = True;
}
else {
if ( !(vk->data = PRS_ALLOC_MEM( ps, uint8_t, 4 ) ) )
return False;
SIVAL( vk->data, 0, vk->data_off );
}
}
/* data_size must be divisible by 8 and large enough to hold the original record */
data_size = ((start_off - end_off ) & 0xfffffff8 );
if ( data_size != vk->rec_size )
DEBUG(10,("prs_vk_rec: data_size check failed (0x%x < 0x%x)\n", data_size, vk->rec_size));
if ( MARSHALLING(&hbin->ps) )
hbin->dirty = True;
return True;
}
/*******************************************************************
read a VK record which is contained in the HBIN block stored
in the prs_struct *ps.
*******************************************************************/
static bool hbin_prs_vk_records( const char *desc, REGF_HBIN *hbin, int depth, REGF_NK_REC *nk, REGF_FILE *file )
{
int i;
uint32_t record_size;
prs_debug(&hbin->ps, depth, desc, "prs_vk_records");
depth++;
/* check if we have anything to do first */
if ( nk->num_values == 0 )
return True;
if ( UNMARSHALLING(&hbin->ps) ) {
if ( !(nk->values = PRS_ALLOC_MEM( &hbin->ps, REGF_VK_REC, nk->num_values ) ) )
return False;
}
/* convert the offset to something relative to this HBIN block */
if ( !prs_set_offset( &hbin->ps, nk->values_off+HBIN_HDR_SIZE-hbin->first_hbin_off-sizeof(uint32_t)) )
return False;
if ( MARSHALLING( &hbin->ps) ) {
record_size = ( ( nk->num_values * sizeof(uint32_t) ) & 0xfffffff8 ) + 8;
record_size = (record_size - 1) ^ 0xFFFFFFFF;
}
if ( !prs_uint32( "record_size", &hbin->ps, depth, &record_size ) )
return False;
for ( i=0; i<nk->num_values; i++ ) {
if ( !prs_uint32( "vk_off", &hbin->ps, depth, &nk->values[i].rec_off ) )
return False;
}
for ( i=0; i<nk->num_values; i++ ) {
REGF_HBIN *sub_hbin = hbin;
uint32_t new_offset;
if ( !hbin_contains_offset( hbin, nk->values[i].rec_off ) ) {
sub_hbin = lookup_hbin_block( file, nk->values[i].rec_off );
if ( !sub_hbin ) {
DEBUG(0,("hbin_prs_vk_records: Failed to find HBIN block containing offset [0x%x]\n",
nk->values[i].hbin_off));
return False;
}
}
new_offset = nk->values[i].rec_off + HBIN_HDR_SIZE - sub_hbin->first_hbin_off;
if ( !prs_set_offset( &sub_hbin->ps, new_offset ) )
return False;
if ( !hbin_prs_vk_rec( "vk_rec", sub_hbin, depth, &nk->values[i], file ) )
return False;
}
if ( MARSHALLING(&hbin->ps) )
hbin->dirty = True;
return True;
}
/*******************************************************************
*******************************************************************/
static REGF_SK_REC* find_sk_record_by_offset( REGF_FILE *file, uint32_t offset )
{
REGF_SK_REC *p_sk;
for ( p_sk=file->sec_desc_list; p_sk; p_sk=p_sk->next ) {
if ( p_sk->sk_off == offset )
return p_sk;
}
return NULL;
}
/*******************************************************************
*******************************************************************/
static REGF_SK_REC* find_sk_record_by_sec_desc( REGF_FILE *file, struct security_descriptor *sd )
{
REGF_SK_REC *p;
for ( p=file->sec_desc_list; p; p=p->next ) {
if ( security_descriptor_equal( p->sec_desc, sd ) )
return p;
}
/* failure */
return NULL;
}
/*******************************************************************
*******************************************************************/
static bool hbin_prs_key( REGF_FILE *file, REGF_HBIN *hbin, REGF_NK_REC *nk )
{
int depth = 0;
REGF_HBIN *sub_hbin;
prs_debug(&hbin->ps, depth, "", "prs_key");
depth++;
/* get the initial nk record */
if ( !prs_nk_rec( "nk_rec", &hbin->ps, depth, nk ))
return False;
/* fill in values */
if ( nk->num_values && (nk->values_off!=REGF_OFFSET_NONE) ) {
sub_hbin = hbin;
if ( !hbin_contains_offset( hbin, nk->values_off ) ) {
sub_hbin = lookup_hbin_block( file, nk->values_off );
if ( !sub_hbin ) {
DEBUG(0,("hbin_prs_key: Failed to find HBIN block containing value_list_offset [0x%x]\n",
nk->values_off));
return False;
}
}
if ( !hbin_prs_vk_records( "vk_rec", sub_hbin, depth, nk, file ))
return False;
}
/* now get subkeys */
if ( nk->num_subkeys && (nk->subkeys_off!=REGF_OFFSET_NONE) ) {
sub_hbin = hbin;
if ( !hbin_contains_offset( hbin, nk->subkeys_off ) ) {
sub_hbin = lookup_hbin_block( file, nk->subkeys_off );
if ( !sub_hbin ) {
DEBUG(0,("hbin_prs_key: Failed to find HBIN block containing subkey_offset [0x%x]\n",
nk->subkeys_off));
return False;
}
}
if ( !hbin_prs_lf_records( "lf_rec", sub_hbin, depth, nk ))
return False;
}
/* get the to the security descriptor. First look if we have already parsed it */
if ( (nk->sk_off!=REGF_OFFSET_NONE) && !( nk->sec_desc = find_sk_record_by_offset( file, nk->sk_off )) ) {
sub_hbin = hbin;
if ( !hbin_contains_offset( hbin, nk->sk_off ) ) {
sub_hbin = lookup_hbin_block( file, nk->sk_off );
if ( !sub_hbin ) {
DEBUG(0,("hbin_prs_key: Failed to find HBIN block containing sk_off [0x%x]\n",
nk->sk_off));
return False;
}
}
if ( !(nk->sec_desc = talloc_zero( file->mem_ctx, REGF_SK_REC )) )
return False;
nk->sec_desc->sk_off = nk->sk_off;
if ( !hbin_prs_sk_rec( "sk_rec", sub_hbin, depth, nk->sec_desc ))
return False;
/* add to the list of security descriptors (ref_count has been read from the files) */
nk->sec_desc->sk_off = nk->sk_off;
DLIST_ADD( file->sec_desc_list, nk->sec_desc );
}
return True;
}
/*******************************************************************
*******************************************************************/
static bool next_record( REGF_HBIN *hbin, const char *hdr, bool *eob )
{
uint8_t header[REC_HDR_SIZE];
uint32_t record_size;
uint32_t curr_off, block_size;
bool found = False;
prs_struct *ps = &hbin->ps;
curr_off = prs_offset( ps );
if ( curr_off == 0 )
prs_set_offset( ps, HBIN_HEADER_REC_SIZE );
/* assume that the current offset is at the record header
and we need to backup to read the record size */
curr_off -= sizeof(uint32_t);
block_size = prs_data_size( ps );
record_size = 0;
memset( header, 0x0, sizeof(uint8_t)*REC_HDR_SIZE );
while ( !found ) {
curr_off = curr_off+record_size;
if ( curr_off >= block_size )
break;
if ( !prs_set_offset( &hbin->ps, curr_off) )
return False;
if ( !prs_uint32( "record_size", ps, 0, &record_size ) )
return False;
if ( !prs_uint8s( True, "header", ps, 0, header, REC_HDR_SIZE ) )
return False;
if (record_size & 0x80000000) {
/* absolute_value(record_size) */
record_size = (record_size ^ 0xffffffff) + 1;
}
if (record_size < sizeof(REC_HDR_SIZE)) {
return false;
}
if (memcmp(header, hdr, REC_HDR_SIZE) == 0) {
found = True;
curr_off += sizeof(uint32_t);
}
}
/* mark prs_struct as done ( at end ) if no more SK records */
/* mark end-of-block as True */
if ( !found ) {
prs_set_offset( &hbin->ps, prs_data_size(&hbin->ps) );
*eob = True;
return False;
}
if ( !prs_set_offset( ps, curr_off ) )
return False;
return True;
}
/*******************************************************************
*******************************************************************/
static bool next_nk_record( REGF_FILE *file, REGF_HBIN *hbin, REGF_NK_REC *nk, bool *eob )
{
if ( next_record( hbin, "nk", eob ) && hbin_prs_key( file, hbin, nk ) )
return True;
return False;
}
/*******************************************************************
Initialize the newly created REGF_BLOCK in *file and write the
block header to disk
*******************************************************************/
static bool init_regf_block( REGF_FILE *file )
{
prs_struct ps;
bool result = True;
if ( !prs_init( &ps, REGF_BLOCKSIZE, file->mem_ctx, MARSHALL ) )
return False;
memcpy( file->header, "regf", REGF_HDR_SIZE );
file->data_offset = 0x20;
file->last_block = 0x1000;
/* set mod time */
unix_to_nt_time( &file->mtime, time(NULL) );
/* hard coded values...no idea what these are ... maybe in time */
file->unknown1 = 0x2;
file->unknown2 = 0x1;
file->unknown3 = 0x3;
file->unknown4 = 0x0;
file->unknown5 = 0x1;
file->unknown6 = 0x1;
/* write header to the buffer */
if ( !prs_regf_block( "regf_header", &ps, 0, file ) ) {
result = False;
goto out;
}
/* calculate the checksum, re-marshall data (to include the checksum)
and write to disk */
file->checksum = regf_block_checksum( &ps );
prs_set_offset( &ps, 0 );
if ( !prs_regf_block( "regf_header", &ps, 0, file ) ) {
result = False;
goto out;
}
if ( write_block( file, &ps, 0 ) == -1 ) {
DEBUG(0,("init_regf_block: Failed to initialize registry header block!\n"));
result = False;
goto out;
}
out:
prs_mem_free( &ps );
return result;
}
/*******************************************************************
Open the registry file and then read in the REGF block to get the
first hbin offset.
*******************************************************************/
REGF_FILE* regfio_open( const char *filename, int flags, int mode )
{
REGF_FILE *rb;
if ( !(rb = SMB_MALLOC_P(REGF_FILE)) ) {
DEBUG(0,("ERROR allocating memory\n"));
return NULL;
}
ZERO_STRUCTP( rb );
rb->fd = -1;
rb->ignore_checksums = false;
if ( !(rb->mem_ctx = talloc_init( "regfio_open" )) ) {
regfio_close( rb );
return NULL;
}
rb->open_flags = flags;
/* open and existing file */
if ( (rb->fd = open(filename, flags, mode)) == -1 ) {
DEBUG(0,("regfio_open: failure to open %s (%s)\n", filename, strerror(errno)));
regfio_close( rb );
return NULL;
}
/* check if we are creating a new file or overwriting an existing one */
if ( flags & (O_CREAT|O_TRUNC) ) {
if ( !init_regf_block( rb ) ) {
DEBUG(0,("regfio_open: Failed to read initial REGF block\n"));
regfio_close( rb );
return NULL;
}
/* success */
return rb;
}
/* read in an existing file */
if ( !read_regf_block( rb ) ) {
DEBUG(0,("regfio_open: Failed to read initial REGF block\n"));
regfio_close( rb );
return NULL;
}
/* success */
return rb;
}
/*******************************************************************
*******************************************************************/
static void regfio_mem_free( REGF_FILE *file )
{
/* free any talloc()'d memory */
if ( file && file->mem_ctx )
talloc_destroy( file->mem_ctx );
}
/*******************************************************************
*******************************************************************/
int regfio_close( REGF_FILE *file )
{
int fd;
/* cleanup for a file opened for write */
if ((file->fd != -1) && (file->open_flags & (O_WRONLY|O_RDWR))) {
prs_struct ps;
REGF_SK_REC *sk;
/* write of sd list */
for ( sk=file->sec_desc_list; sk; sk=sk->next ) {
hbin_prs_sk_rec( "sk_rec", sk->hbin, 0, sk );
}
/* flush any dirty blocks */
while ( file->block_list ) {
hbin_block_close( file, file->block_list );
}
ZERO_STRUCT( ps );
unix_to_nt_time( &file->mtime, time(NULL) );
if ( read_block( file, &ps, 0, REGF_BLOCKSIZE ) != -1 ) {
/* now use for writing */
prs_switch_type( &ps, MARSHALL );
/* stream the block once, generate the checksum,
and stream it again */
prs_set_offset( &ps, 0 );
prs_regf_block( "regf_blocK", &ps, 0, file );
file->checksum = regf_block_checksum( &ps );
prs_set_offset( &ps, 0 );
prs_regf_block( "regf_blocK", &ps, 0, file );
/* now we are ready to write it to disk */
if ( write_block( file, &ps, 0 ) == -1 )
DEBUG(0,("regfio_close: failed to update the regf header block!\n"));
}
prs_mem_free( &ps );
}
regfio_mem_free( file );
/* nothing tdo do if there is no open file */
if (file->fd == -1)
return 0;
fd = file->fd;
file->fd = -1;
SAFE_FREE( file );
return close( fd );
}
/*******************************************************************
*******************************************************************/
static void regfio_flush( REGF_FILE *file )
{
REGF_HBIN *hbin;
for ( hbin=file->block_list; hbin; hbin=hbin->next ) {
write_hbin_block( file, hbin );
}
}
/*******************************************************************
There should be only *one* root key in the registry file based
on my experience. --jerry
*******************************************************************/
REGF_NK_REC* regfio_rootkey( REGF_FILE *file )
{
REGF_NK_REC *nk;
REGF_HBIN *hbin;
uint32_t offset = REGF_BLOCKSIZE;
bool found = False;
bool eob;
if ( !file )
return NULL;
if ( !(nk = talloc_zero( file->mem_ctx, REGF_NK_REC )) ) {
DEBUG(0,("regfio_rootkey: talloc() failed!\n"));
return NULL;
}
/* scan through the file on HBIN block at a time looking
for an NK record with a type == 0x002c.
Normally this is the first nk record in the first hbin
block (but I'm not assuming that for now) */
while ( (hbin = read_hbin_block( file, offset )) ) {
eob = False;
while ( !eob) {
if ( next_nk_record( file, hbin, nk, &eob ) ) {
if ( nk->key_type == NK_TYPE_ROOTKEY ) {
found = True;
break;
}
}
prs_mem_free( &hbin->ps );
}
if ( found )
break;
offset += hbin->block_size;
}
if ( !found ) {
DEBUG(0,("regfio_rootkey: corrupt registry file ? No root key record located\n"));
return NULL;
}
DLIST_ADD( file->block_list, hbin );
return nk;
}
/*******************************************************************
This acts as an iterator over the subkeys defined for a given
NK record. Remember that offsets are from the *first* HBIN block.
*******************************************************************/
REGF_NK_REC* regfio_fetch_subkey( REGF_FILE *file, REGF_NK_REC *nk )
{
REGF_NK_REC *subkey;
REGF_HBIN *hbin;
uint32_t nk_offset;
/* see if there is anything left to report */
if (nk == NULL ||
nk->subkeys.hashes == NULL ||
nk->subkey_index >= nk->subkeys.num_keys ||
(nk->subkeys_off == REGF_OFFSET_NONE) ||
(nk->subkey_index >= nk->num_subkeys)) {
return NULL;
}
/* find the HBIN block which should contain the nk record */
hbin = lookup_hbin_block(file,
nk->subkeys.hashes[nk->subkey_index].nk_off);
if (hbin == NULL) {
DEBUG(0,("hbin_prs_key: Failed to find HBIN block containing offset [0x%x]\n",
nk->subkeys.hashes[nk->subkey_index].nk_off));
return NULL;
}
nk_offset = nk->subkeys.hashes[nk->subkey_index].nk_off;
if ( !prs_set_offset( &hbin->ps, (HBIN_HDR_SIZE + nk_offset - hbin->first_hbin_off) ) )
return NULL;
nk->subkey_index++;
if ( !(subkey = talloc_zero( file->mem_ctx, REGF_NK_REC )) )
return NULL;
if ( !hbin_prs_key( file, hbin, subkey ) )
return NULL;
return subkey;
}
/*******************************************************************
*******************************************************************/
static REGF_HBIN* regf_hbin_allocate( REGF_FILE *file, uint32_t block_size )
{
REGF_HBIN *hbin;
SMB_STRUCT_STAT sbuf;
if ( !(hbin = talloc_zero( file->mem_ctx, REGF_HBIN )) )
return NULL;
memcpy( hbin->header, "hbin", HBIN_HDR_SIZE);
if (sys_fstat(file->fd, &sbuf, false)) {
DEBUG(0,("regf_hbin_allocate: stat() failed! (%s)\n", strerror(errno)));
return NULL;
}
hbin->file_off = sbuf.st_ex_size;
hbin->free_off = HBIN_HEADER_REC_SIZE;
hbin->free_size = block_size - hbin->free_off + sizeof(uint32_t);
hbin->block_size = block_size;
hbin->first_hbin_off = hbin->file_off - REGF_BLOCKSIZE;
if ( !prs_init( &hbin->ps, block_size, file->mem_ctx, MARSHALL ) )
return NULL;
if ( !prs_hbin_block( "new_hbin", &hbin->ps, 0, hbin ) )
return NULL;
if ( !write_hbin_block( file, hbin ) )
return NULL;
file->last_block = hbin->file_off;
return hbin;
}
/*******************************************************************
*******************************************************************/
static void update_free_space( REGF_HBIN *hbin, uint32_t size_used )
{
hbin->free_off += size_used;
hbin->free_size -= size_used;
if ( hbin->free_off >= hbin->block_size ) {
hbin->free_off = REGF_OFFSET_NONE;
}
return;
}
/*******************************************************************
*******************************************************************/
static REGF_HBIN* find_free_space( REGF_FILE *file, uint32_t size )
{
REGF_HBIN *hbin, *p_hbin;
uint32_t block_off;
bool cached;
/* check open block list */
for ( hbin=file->block_list; hbin!=NULL; hbin=hbin->next ) {
/* only check blocks that actually have available space */
if ( hbin->free_off == REGF_OFFSET_NONE )
continue;
/* check for a large enough available chunk */
if ( (hbin->block_size - hbin->free_off) >= size ) {
DLIST_PROMOTE( file->block_list, hbin );
goto done;
}
}
/* parse the file until we find a block with
enough free space; save the last non-filled hbin */
block_off = REGF_BLOCKSIZE;
do {
/* cleanup before the next round */
cached = False;
if ( hbin )
prs_mem_free( &hbin->ps );
hbin = read_hbin_block( file, block_off );
if ( hbin ) {
/* make sure that we don't already have this block in memory */
for ( p_hbin=file->block_list; p_hbin!=NULL; p_hbin=p_hbin->next ) {
if ( p_hbin->file_off == hbin->file_off ) {
cached = True;
break;
}
}
block_off = hbin->file_off + hbin->block_size;
if ( cached ) {
prs_mem_free( &hbin->ps );
hbin = NULL;
continue;
}
}
/* if (cached block or (new block and not enough free space)) then continue looping */
} while ( cached || (hbin && (hbin->free_size < size)) );
/* no free space; allocate a new one */
if ( !hbin ) {
uint32_t alloc_size;
/* allocate in multiples of REGF_ALLOC_BLOCK; make sure (size + hbin_header) fits */
alloc_size = (((size+HBIN_HEADER_REC_SIZE) / REGF_ALLOC_BLOCK ) + 1 ) * REGF_ALLOC_BLOCK;
if ( !(hbin = regf_hbin_allocate( file, alloc_size )) ) {
DEBUG(0,("find_free_space: regf_hbin_allocate() failed!\n"));
return NULL;
}
DLIST_ADD( file->block_list, hbin );
}
done:
/* set the offset to be ready to write */
if ( !prs_set_offset( &hbin->ps, hbin->free_off-sizeof(uint32_t) ) )
return NULL;
/* write the record size as a placeholder for now, it should be
probably updated by the caller once it all of the data necessary
for the record */
if ( !prs_uint32("allocated_size", &hbin->ps, 0, &size) )
return NULL;
update_free_space( hbin, size );
return hbin;
}
/*******************************************************************
*******************************************************************/
static uint32_t sk_record_data_size( struct security_descriptor * sd )
{
uint32_t size, size_mod8;
size_mod8 = 0;
/* the record size is sizeof(hdr) + name + static members + data_size_field */
size = sizeof(uint32_t)*5 + ndr_size_security_descriptor(sd, 0) + sizeof(uint32_t);
/* multiple of 8 */
size_mod8 = size & 0xfffffff8;
if ( size_mod8 < size )
size_mod8 += 8;
return size_mod8;
}
/*******************************************************************
*******************************************************************/
static uint32_t vk_record_data_size( REGF_VK_REC *vk )
{
uint32_t size, size_mod8;
size_mod8 = 0;
/* the record size is sizeof(hdr) + name + static members + data_size_field */
size = REC_HDR_SIZE + (sizeof(uint16_t)*3) + (sizeof(uint32_t)*3) + sizeof(uint32_t);
if ( vk->valuename )
size += strlen(vk->valuename);
/* multiple of 8 */
size_mod8 = size & 0xfffffff8;
if ( size_mod8 < size )
size_mod8 += 8;
return size_mod8;
}
/*******************************************************************
*******************************************************************/
static uint32_t lf_record_data_size( uint32_t num_keys )
{
uint32_t size, size_mod8;
size_mod8 = 0;
/* the record size is sizeof(hdr) + num_keys + sizeof of hash_array + data_size_uint32_t */
size = REC_HDR_SIZE + sizeof(uint16_t) + (sizeof(REGF_HASH_REC) * num_keys) + sizeof(uint32_t);
/* multiple of 8 */
size_mod8 = size & 0xfffffff8;
if ( size_mod8 < size )
size_mod8 += 8;
return size_mod8;
}
/*******************************************************************
*******************************************************************/
static uint32_t nk_record_data_size( REGF_NK_REC *nk )
{
uint32_t size, size_mod8;
size_mod8 = 0;
/* the record size is static + length_of_keyname + length_of_classname + data_size_uint32_t */
size = 0x4c + strlen(nk->keyname) + sizeof(uint32_t);
if ( nk->classname )
size += strlen( nk->classname );
/* multiple of 8 */
size_mod8 = size & 0xfffffff8;
if ( size_mod8 < size )
size_mod8 += 8;
return size_mod8;
}
/*******************************************************************
*******************************************************************/
static bool create_vk_record(REGF_FILE *file, REGF_VK_REC *vk,
struct regval_blob *value)
{
char *name = regval_name(value);
REGF_HBIN *data_hbin;
ZERO_STRUCTP( vk );
memcpy( vk->header, "vk", REC_HDR_SIZE );
if ( name ) {
vk->valuename = talloc_strdup( file->mem_ctx, regval_name(value) );
vk->flag = VK_FLAG_NAME_PRESENT;
}
vk->data_size = regval_size( value );
vk->type = regval_type( value );
if ( vk->data_size > sizeof(uint32_t) ) {
uint32_t data_size = ( (vk->data_size+sizeof(uint32_t)) & 0xfffffff8 ) + 8;
vk->data = (uint8_t *)talloc_memdup( file->mem_ctx,
regval_data_p(value),
vk->data_size );
if (vk->data == NULL) {
return False;
}
/* go ahead and store the offset....we'll pick this hbin block back up when
we stream the data */
if ((data_hbin = find_free_space(file, data_size )) == NULL) {
return False;
}
vk->data_off = prs_offset( &data_hbin->ps ) + data_hbin->first_hbin_off - HBIN_HDR_SIZE;
}
else {
/* make sure we don't try to copy from a NULL value pointer */
if ( vk->data_size != 0 )
memcpy( &vk->data_off, regval_data_p(value), vk->data_size);
vk->data_size |= VK_DATA_IN_OFFSET;
}
return True;
}
/*******************************************************************
*******************************************************************/
static int hashrec_cmp( REGF_HASH_REC *h1, REGF_HASH_REC *h2 )
{
return strcasecmp_m( h1->fullname, h2->fullname );
}
/*******************************************************************
*******************************************************************/
REGF_NK_REC* regfio_write_key( REGF_FILE *file, const char *name,
struct regval_ctr *values, struct regsubkey_ctr *subkeys,
struct security_descriptor *sec_desc, REGF_NK_REC *parent )
{
REGF_NK_REC *nk;
REGF_HBIN *vlist_hbin = NULL;
uint32_t size;
if ( !(nk = talloc_zero( file->mem_ctx, REGF_NK_REC )) )
return NULL;
memcpy( nk->header, "nk", REC_HDR_SIZE );
if ( !parent )
nk->key_type = NK_TYPE_ROOTKEY;
else
nk->key_type = NK_TYPE_NORMALKEY;
/* store the parent offset (or -1 if a the root key */
nk->parent_off = parent ? (parent->hbin_off + parent->hbin->file_off - REGF_BLOCKSIZE - HBIN_HDR_SIZE ) : REGF_OFFSET_NONE;
/* no classname currently */
nk->classname_off = REGF_OFFSET_NONE;
nk->classname = NULL;
nk->keyname = talloc_strdup( file->mem_ctx, name );
/* current modification time */
unix_to_nt_time( &nk->mtime, time(NULL) );
/* allocate the record on disk */
size = nk_record_data_size( nk );
nk->rec_size = ( size - 1 ) ^ 0XFFFFFFFF;
if ((nk->hbin = find_free_space( file, size )) == NULL) {
return NULL;
}
nk->hbin_off = prs_offset( &nk->hbin->ps );
/* Update the hash record in the parent */
if ( parent ) {
REGF_HASH_REC *hash = &parent->subkeys.hashes[parent->subkey_index];
hash->nk_off = prs_offset( &nk->hbin->ps ) + nk->hbin->first_hbin_off - HBIN_HDR_SIZE;
memcpy(hash->keycheck, name, MIN(strlen(name),sizeof(uint32_t)));
hash->fullname = talloc_strdup( file->mem_ctx, name );
parent->subkey_index++;
/* sort the list by keyname */
TYPESAFE_QSORT(parent->subkeys.hashes, parent->subkey_index, hashrec_cmp);
if ( !hbin_prs_lf_records( "lf_rec", parent->subkeys.hbin, 0, parent ) )
return NULL;
}
/* write the security descriptor */
nk->sk_off = REGF_OFFSET_NONE;
if ( sec_desc ) {
uint32_t sk_size = sk_record_data_size( sec_desc );
REGF_HBIN *sk_hbin;
/* search for it in the existing list of sd's */
if ( (nk->sec_desc = find_sk_record_by_sec_desc( file, sec_desc )) == NULL ) {
/* not found so add it to the list */
if (!(sk_hbin = find_free_space( file, sk_size ))) {
return NULL;
}
if ( !(nk->sec_desc = talloc_zero( file->mem_ctx, REGF_SK_REC )) )
return NULL;
/* now we have to store the security descriptor in the list and
update the offsets */
memcpy( nk->sec_desc->header, "sk", REC_HDR_SIZE );
nk->sec_desc->hbin = sk_hbin;
nk->sec_desc->hbin_off = prs_offset( &sk_hbin->ps );
nk->sec_desc->sk_off = prs_offset( &sk_hbin->ps ) + sk_hbin->first_hbin_off - HBIN_HDR_SIZE;
nk->sec_desc->rec_size = (sk_size-1) ^ 0xFFFFFFFF;
nk->sec_desc->sec_desc = sec_desc;
nk->sec_desc->ref_count = 0;
/* size value must be self-inclusive */
nk->sec_desc->size = ndr_size_security_descriptor(sec_desc, 0)
+ sizeof(uint32_t);
DLIST_ADD_END( file->sec_desc_list, nk->sec_desc);
/* update the offsets for us and the previous sd in the list.
if this is the first record, then just set the next and prev
offsets to ourself. */
if ( DLIST_PREV(nk->sec_desc) ) {
REGF_SK_REC *prev = DLIST_PREV(nk->sec_desc);
nk->sec_desc->prev_sk_off = prev->hbin_off + prev->hbin->first_hbin_off - HBIN_HDR_SIZE;
prev->next_sk_off = nk->sec_desc->sk_off;
/* the end must loop around to the front */
nk->sec_desc->next_sk_off = file->sec_desc_list->sk_off;
/* and first must loop around to the tail */
file->sec_desc_list->prev_sk_off = nk->sec_desc->sk_off;
} else {
nk->sec_desc->prev_sk_off = nk->sec_desc->sk_off;
nk->sec_desc->next_sk_off = nk->sec_desc->sk_off;
}
}
/* bump the reference count +1 */
nk->sk_off = nk->sec_desc->sk_off;
nk->sec_desc->ref_count++;
}
/* write the subkeys */
nk->subkeys_off = REGF_OFFSET_NONE;
if ( (nk->num_subkeys = regsubkey_ctr_numkeys( subkeys )) != 0 ) {
uint32_t lf_size = lf_record_data_size( nk->num_subkeys );
uint32_t namelen;
int i;
if (!(nk->subkeys.hbin = find_free_space( file, lf_size ))) {
return NULL;
}
nk->subkeys.hbin_off = prs_offset( &nk->subkeys.hbin->ps );
nk->subkeys.rec_size = (lf_size-1) ^ 0xFFFFFFFF;
nk->subkeys_off = prs_offset( &nk->subkeys.hbin->ps ) + nk->subkeys.hbin->first_hbin_off - HBIN_HDR_SIZE;
memcpy( nk->subkeys.header, "lf", REC_HDR_SIZE );
nk->subkeys.num_keys = nk->num_subkeys;
if (nk->subkeys.num_keys) {
if ( !(nk->subkeys.hashes = talloc_zero_array( file->mem_ctx, REGF_HASH_REC, nk->subkeys.num_keys )) )
return NULL;
} else {
nk->subkeys.hashes = NULL;
}
nk->subkey_index = 0;
/* update the max_bytes_subkey{name,classname} fields */
for ( i=0; i<nk->num_subkeys; i++ ) {
namelen = strlen( regsubkey_ctr_specific_key(subkeys, i) );
if ( namelen*2 > nk->max_bytes_subkeyname )
nk->max_bytes_subkeyname = namelen * 2;
}
}
/* write the values */
nk->values_off = REGF_OFFSET_NONE;
if ( (nk->num_values = regval_ctr_numvals( values )) != 0 ) {
uint32_t vlist_size = ( ( nk->num_values * sizeof(uint32_t) ) & 0xfffffff8 ) + 8;
int i;
if (!(vlist_hbin = find_free_space( file, vlist_size ))) {
return NULL;
}
nk->values_off = prs_offset( &vlist_hbin->ps ) + vlist_hbin->first_hbin_off - HBIN_HDR_SIZE;
if (nk->num_values) {
if ( !(nk->values = talloc_array( file->mem_ctx, REGF_VK_REC, nk->num_values )) )
return NULL;
} else {
nk->values = NULL;
}
/* create the vk records */
for ( i=0; i<nk->num_values; i++ ) {
uint32_t vk_size, namelen, datalen;
struct regval_blob *r;
r = regval_ctr_specific_value( values, i );
create_vk_record( file, &nk->values[i], r );
vk_size = vk_record_data_size( &nk->values[i] );
nk->values[i].hbin = find_free_space( file, vk_size );
nk->values[i].hbin_off = prs_offset( &nk->values[i].hbin->ps );
nk->values[i].rec_size = ( vk_size - 1 ) ^ 0xFFFFFFFF;
nk->values[i].rec_off = prs_offset( &nk->values[i].hbin->ps )
+ nk->values[i].hbin->first_hbin_off
- HBIN_HDR_SIZE;
/* update the max bytes fields if necessary */
namelen = strlen( regval_name(r) );
if ( namelen*2 > nk->max_bytes_valuename )
nk->max_bytes_valuename = namelen * 2;
datalen = regval_size( r );
if ( datalen > nk->max_bytes_value )
nk->max_bytes_value = datalen;
}
}
/* stream the records */
prs_set_offset( &nk->hbin->ps, nk->hbin_off );
if ( !prs_nk_rec( "nk_rec", &nk->hbin->ps, 0, nk ) )
return NULL;
if ( nk->num_values ) {
if ( !hbin_prs_vk_records( "vk_records", vlist_hbin, 0, nk, file ) )
return NULL;
}
regfio_flush( file );
return nk;
}