--- /dev/null
+/*
+ * 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 2 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, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include "includes.h"
+#include "regfio.h"
+
+/*******************************************************************
+ *
+ * TODO : Right now this code basically ignores classnames.
+ *
+ ******************************************************************/
+
+
+/*******************************************************************
+*******************************************************************/
+
+static int write_block( REGF_FILE *file, prs_struct *ps, uint32 offset )
+{
+ int bytes_written, returned;
+ char *buffer = prs_data_p( ps );
+ uint32 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 ) ) {
+ 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 file_offset, uint32 block_size )
+{
+ int bytes_read, returned;
+ char *buffer;
+ SMB_STRUCT_STAT sbuf;
+
+ /* check for end of file */
+
+ if ( sys_fstat( file->fd, &sbuf ) ) {
+ DEBUG(0,("read_block: stat() failed! (%s)\n", strerror(errno)));
+ return -1;
+ }
+
+ if ( (size_t)file_offset >= sbuf.st_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;
+ }
+
+ prs_init( ps, block_size, file->mem_ctx, UNMARSHALL );
+ 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 vald registry file ?\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 header = 0xffffffff;
+
+ if ( !prs_set_offset( &hbin->ps, hbin->free_off-sizeof(uint32) ) )
+ 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*)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 block_size2;
+
+ prs_debug(ps, depth, desc, "prs_regf_block");
+ depth++;
+
+ if ( !prs_uint8s( True, "header", ps, depth, (uint8*)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 class_length, name_length;
+ uint32 start;
+ uint32 data_size, start_off, end_off;
+ uint32 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)) )
+ 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*)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*)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 regf_block_checksum( prs_struct *ps )
+{
+ char *buffer = prs_data_p( ps );
+ uint32 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 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 ) {
+ 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 record_size, curr_off, block_size, header;
+
+ if ( !(hbin = TALLOC_ZERO_P(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 preceeding the record itself */
+
+ if ( !prs_set_offset( &hbin->ps, file->data_offset+HBIN_HDR_SIZE-sizeof(uint32) ) )
+ return False;
+
+ 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 False;
+
+ if ( !prs_uint32( "rec_size", &hbin->ps, 0, &record_size ) )
+ return False;
+ if ( !prs_uint32( "header", &hbin->ps, 0, &header ) )
+ return False;
+
+ SMB_ASSERT( record_size != 0 );
+
+ 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);
+ 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 False;
+
+ return hbin;
+}
+
+/*******************************************************************
+ Input a random offset and receive the corresponding HBIN
+ block for it
+*******************************************************************/
+
+static BOOL hbin_contains_offset( REGF_HBIN *hbin, uint32 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 offset )
+{
+ REGF_HBIN *hbin = NULL;
+ uint32 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 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)) )
+ 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*)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->hashes = PRS_ALLOC_MEM( &hbin->ps, REGF_HASH_REC, lf->num_keys )) )
+ return False;
+ }
+
+ 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 tag = 0xFFFF;
+ uint32 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)) )
+ 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*)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;
+
+ if ( !sec_io_desc( "sec_desc", &sk->sec_desc, ps, depth ))
+ 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 > 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 offset;
+ uint16 name_length;
+ prs_struct *ps = &hbin->ps;
+ uint32 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)) )
+ 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*)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*)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 data_rec_size;
+
+ if ( UNMARSHALLING(&hbin->ps) ) {
+ if ( !(vk->data = PRS_ALLOC_MEM( ps, uint8, 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) )) )
+ return False;
+
+ if ( MARSHALLING(&hblock->ps) ) {
+ data_rec_size = ( (vk->data_size+sizeof(uint32)) & 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, 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 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)) )
+ return False;
+
+ if ( MARSHALLING( &hbin->ps) ) {
+ record_size = ( ( nk->num_values * sizeof(uint32) ) & 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 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 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, SEC_DESC *sd )
+{
+ REGF_SK_REC *p;
+
+ for ( p=file->sec_desc_list; p; p=p->next ) {
+ if ( sec_desc_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, "", "fetch_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_offset [0x%x]\n",
+ nk->subkeys_off));
+ return False;
+ }
+ }
+
+ if ( !(nk->sec_desc = TALLOC_ZERO_P( 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 header[REC_HDR_SIZE];
+ uint32 record_size;
+ uint32 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);
+
+ block_size = prs_data_size( ps );
+ record_size = 0;
+ memset( header, 0x0, sizeof(uint8)*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 ( memcmp( header, hdr, REC_HDR_SIZE ) == 0 ) {
+ found = True;
+ curr_off += sizeof(uint32);
+ }
+ }
+
+ /* 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;
+}
+
+/*******************************************************************
+ Intialize 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 diea 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;
+
+ if ( !(rb->mem_ctx = talloc_init( "read_regf_block" )) ) {
+ 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->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 || (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 offset = REGF_BLOCKSIZE;
+ BOOL found = False;
+ BOOL eob;
+
+ if ( !file )
+ return NULL;
+
+ if ( !(nk = TALLOC_ZERO_P( 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 interator 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 nk_offset;
+
+ /* see if there is anything left to report */
+
+ if ( !nk || (nk->subkeys_off==REGF_OFFSET_NONE) || (nk->subkey_index >= nk->num_subkeys) )
+ return NULL;
+
+ /* find the HBIN block which should contain the nk record */
+
+ if ( !(hbin = lookup_hbin_block( file, nk->subkeys.hashes[nk->subkey_index].nk_off )) ) {
+ 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_P( 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 block_size )
+{
+ REGF_HBIN *hbin;
+ SMB_STRUCT_STAT sbuf;
+
+ if ( !(hbin = TALLOC_ZERO_P( file->mem_ctx, REGF_HBIN )) )
+ return NULL;
+
+ memcpy( hbin->header, "hbin", sizeof(HBIN_HDR_SIZE) );
+
+
+ if ( sys_fstat( file->fd, &sbuf ) ) {
+ DEBUG(0,("regf_hbin_allocate: stat() failed! (%s)\n", strerror(errno)));
+ return NULL;
+ }
+
+ hbin->file_off = sbuf.st_size;
+
+ hbin->free_off = HBIN_HEADER_REC_SIZE;
+ hbin->free_size = block_size - hbin->free_off + sizeof(uint32);;
+
+ 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 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 size )
+{
+ REGF_HBIN *hbin, *p_hbin;
+ uint32 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 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) ) )
+ 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 False;
+
+ update_free_space( hbin, size );
+
+ return hbin;
+}
+
+/*******************************************************************
+*******************************************************************/
+
+static uint32 sk_record_data_size( SEC_DESC * sd )
+{
+ uint32 size, size_mod8;
+
+ size_mod8 = 0;
+
+ /* the record size is sizeof(hdr) + name + static members + data_size_field */
+
+ size = sizeof(uint32)*5 + sec_desc_size( sd ) + sizeof(uint32);
+
+ /* multiple of 8 */
+ size_mod8 = size & 0xfffffff8;
+ if ( size_mod8 < size )
+ size_mod8 += 8;
+
+ return size_mod8;
+}
+
+/*******************************************************************
+*******************************************************************/
+
+static uint32 vk_record_data_size( REGF_VK_REC *vk )
+{
+ uint32 size, size_mod8;
+
+ size_mod8 = 0;
+
+ /* the record size is sizeof(hdr) + name + static members + data_size_field */
+
+ size = REC_HDR_SIZE + (sizeof(uint16)*3) + (sizeof(uint32)*3) + sizeof(uint32);
+
+ 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 lf_record_data_size( uint32 num_keys )
+{
+ uint32 size, size_mod8;
+
+ size_mod8 = 0;
+
+ /* the record size is sizeof(hdr) + num_keys + sizeof of hash_array + data_size_uint32 */
+
+ size = REC_HDR_SIZE + sizeof(uint16) + (sizeof(REGF_HASH_REC) * num_keys) + sizeof(uint32);
+
+ /* multiple of 8 */
+ size_mod8 = size & 0xfffffff8;
+ if ( size_mod8 < size )
+ size_mod8 += 8;
+
+ return size_mod8;
+}
+
+/*******************************************************************
+*******************************************************************/
+
+static uint32 nk_record_data_size( REGF_NK_REC *nk )
+{
+ uint32 size, size_mod8;
+
+ size_mod8 = 0;
+
+ /* the record size is static + length_of_keyname + length_of_classname + data_size_uint32 */
+
+ size = 0x4c + strlen(nk->keyname) + sizeof(uint32);
+
+ 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, REGISTRY_VALUE *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) ) {
+ uint32 data_size = ( (vk->data_size+sizeof(uint32)) & 0xfffffff8 ) + 8;
+
+ vk->data = TALLOC_MEMDUP( file->mem_ctx, regval_data_p(value), vk->data_size );
+
+ /* go ahead and store the offset....we'll pick this hbin block back up when
+ we stream the data */
+
+ data_hbin = find_free_space(file, data_size );
+ 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), sizeof(uint32) );
+ vk->data_size |= VK_DATA_IN_OFFSET;
+ }
+
+ return True;
+}
+
+/*******************************************************************
+*******************************************************************/
+
+static int hashrec_cmp( REGF_HASH_REC *h1, REGF_HASH_REC *h2 )
+{
+ return StrCaseCmp( h1->fullname, h2->fullname );
+}
+
+/*******************************************************************
+*******************************************************************/
+
+ REGF_NK_REC* regfio_write_key( REGF_FILE *file, const char *name,
+ REGVAL_CTR *values, REGSUBKEY_CTR *subkeys,
+ SEC_DESC *sec_desc, REGF_NK_REC *parent )
+{
+ REGF_NK_REC *nk;
+ REGF_HBIN *vlist_hbin = NULL;
+ uint32 size;
+
+ if ( !(nk = TALLOC_ZERO_P( 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;
+ nk->hbin = find_free_space( file, size );
+ 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, sizeof(uint32) );
+ hash->fullname = talloc_strdup( file->mem_ctx, name );
+ parent->subkey_index++;
+
+ /* sort the list by keyname */
+
+ qsort( parent->subkeys.hashes, parent->subkey_index, sizeof(REGF_HASH_REC), QSORT_CAST hashrec_cmp );
+
+ if ( !hbin_prs_lf_records( "lf_rec", parent->subkeys.hbin, 0, parent ) )
+ return False;
+ }
+
+ /* write the security descriptor */
+
+ nk->sk_off = REGF_OFFSET_NONE;
+ if ( sec_desc ) {
+ uint32 sk_size = sk_record_data_size( sec_desc );
+ REGF_HBIN *sk_hbin;
+ REGF_SK_REC *tmp = NULL;
+
+ /* 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 */
+
+ sk_hbin = find_free_space( file, sk_size );
+
+ if ( !(nk->sec_desc = TALLOC_ZERO_P( 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 = sec_desc_size(sec_desc) + sizeof(uint32);
+
+ DLIST_ADD_END( file->sec_desc_list, nk->sec_desc, tmp );
+
+ /* 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 ( nk->sec_desc->prev ) {
+ REGF_SK_REC *prev = nk->sec_desc->prev;
+
+ 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 lf_size = lf_record_data_size( nk->num_subkeys );
+ uint32 namelen;
+ int i;
+
+ nk->subkeys.hbin = find_free_space( file, lf_size );
+ 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.hashes = TALLOC_ZERO_ARRAY( file->mem_ctx, REGF_HASH_REC, nk->subkeys.num_keys )) )
+ return 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 vlist_size = ( ( nk->num_values * sizeof(uint32) ) & 0xfffffff8 ) + 8;
+ int i;
+
+ vlist_hbin = find_free_space( file, vlist_size );
+ nk->values_off = prs_offset( &vlist_hbin->ps ) + vlist_hbin->first_hbin_off - HBIN_HDR_SIZE;
+
+ if ( !(nk->values = TALLOC_ARRAY( file->mem_ctx, REGF_VK_REC, nk->num_values )) )
+ return NULL;
+
+ /* create the vk records */
+
+ for ( i=0; i<nk->num_values; i++ ) {
+ uint32 vk_size, namelen, datalen;
+ REGISTRY_VALUE *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 False;
+
+ if ( nk->num_values ) {
+ if ( !hbin_prs_vk_records( "vk_records", vlist_hbin, 0, nk, file ) )
+ return False;
+ }
+
+
+ regfio_flush( file );
+
+ return nk;
+}
+
projects / samba / blobdiff