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https://github.com/samba-team/samba.git
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aa7f406317
Found by coverity.
1980 lines
52 KiB
C
1980 lines
52 KiB
C
/*
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* Unix SMB/CIFS implementation.
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* Windows NT registry I/O library
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* Copyright (c) Gerald (Jerry) Carter 2005
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "includes.h"
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#include "system/filesys.h"
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#include "regfio.h"
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#include "../librpc/gen_ndr/ndr_security.h"
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#include "../libcli/security/security_descriptor.h"
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#include "../libcli/security/secdesc.h"
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#undef DBGC_CLASS
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#define DBGC_CLASS DBGC_REGISTRY
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/*******************************************************************
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*
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* TODO : Right now this code basically ignores classnames.
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*
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******************************************************************/
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#if defined(PARANOID_MALLOC_CHECKER)
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#define PRS_ALLOC_MEM(ps, type, count) (type *)prs_alloc_mem_((ps),sizeof(type),(count))
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#else
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#define PRS_ALLOC_MEM(ps, type, count) (type *)prs_alloc_mem((ps),sizeof(type),(count))
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#endif
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/*******************************************************************
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Reads or writes an NTTIME structure.
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********************************************************************/
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static bool smb_io_time(const char *desc, NTTIME *nttime, prs_struct *ps, int depth)
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{
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uint32 low, high;
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if (nttime == NULL)
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return False;
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prs_debug(ps, depth, desc, "smb_io_time");
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depth++;
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if(!prs_align(ps))
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return False;
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if (MARSHALLING(ps)) {
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low = *nttime & 0xFFFFFFFF;
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high = *nttime >> 32;
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}
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if(!prs_uint32("low ", ps, depth, &low)) /* low part */
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return False;
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if(!prs_uint32("high", ps, depth, &high)) /* high part */
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return False;
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if (UNMARSHALLING(ps)) {
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*nttime = (((uint64_t)high << 32) + low);
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}
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return True;
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}
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/*******************************************************************
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*******************************************************************/
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static int write_block( REGF_FILE *file, prs_struct *ps, uint32 offset )
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{
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int bytes_written, returned;
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char *buffer = prs_data_p( ps );
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uint32 buffer_size = prs_data_size( ps );
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SMB_STRUCT_STAT sbuf;
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if ( file->fd == -1 )
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return -1;
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/* check for end of file */
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if (sys_fstat(file->fd, &sbuf, false)) {
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DEBUG(0,("write_block: stat() failed! (%s)\n", strerror(errno)));
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return -1;
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}
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if ( lseek( file->fd, offset, SEEK_SET ) == -1 ) {
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DEBUG(0,("write_block: lseek() failed! (%s)\n", strerror(errno) ));
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return -1;
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}
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bytes_written = returned = 0;
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while ( bytes_written < buffer_size ) {
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if ( (returned = write( file->fd, buffer+bytes_written, buffer_size-bytes_written )) == -1 ) {
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DEBUG(0,("write_block: write() failed! (%s)\n", strerror(errno) ));
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return False;
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}
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bytes_written += returned;
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}
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return bytes_written;
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}
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/*******************************************************************
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*******************************************************************/
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static int read_block( REGF_FILE *file, prs_struct *ps, uint32 file_offset, uint32 block_size )
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{
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int bytes_read, returned;
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char *buffer;
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SMB_STRUCT_STAT sbuf;
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/* check for end of file */
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if (sys_fstat(file->fd, &sbuf, false)) {
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DEBUG(0,("read_block: stat() failed! (%s)\n", strerror(errno)));
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return -1;
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}
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if ( (size_t)file_offset >= sbuf.st_ex_size )
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return -1;
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/* if block_size == 0, we are parsing HBIN records and need
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to read some of the header to get the block_size from there */
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if ( block_size == 0 ) {
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char hdr[0x20];
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if ( lseek( file->fd, file_offset, SEEK_SET ) == -1 ) {
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DEBUG(0,("read_block: lseek() failed! (%s)\n", strerror(errno) ));
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return -1;
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}
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returned = read( file->fd, hdr, 0x20 );
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if ( (returned == -1) || (returned < 0x20) ) {
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DEBUG(0,("read_block: failed to read in HBIN header. Is the file corrupt?\n"));
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return -1;
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}
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/* make sure this is an hbin header */
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if ( strncmp( hdr, "hbin", HBIN_HDR_SIZE ) != 0 ) {
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DEBUG(0,("read_block: invalid block header!\n"));
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return -1;
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}
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block_size = IVAL( hdr, 0x08 );
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}
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DEBUG(10,("read_block: block_size == 0x%x\n", block_size ));
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/* set the offset, initialize the buffer, and read the block from disk */
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if ( lseek( file->fd, file_offset, SEEK_SET ) == -1 ) {
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DEBUG(0,("read_block: lseek() failed! (%s)\n", strerror(errno) ));
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return -1;
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}
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if (!prs_init( ps, block_size, file->mem_ctx, UNMARSHALL )) {
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DEBUG(0,("read_block: prs_init() failed! (%s)\n", strerror(errno) ));
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return -1;
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}
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buffer = prs_data_p( ps );
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bytes_read = returned = 0;
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while ( bytes_read < block_size ) {
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if ( (returned = read( file->fd, buffer+bytes_read, block_size-bytes_read )) == -1 ) {
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DEBUG(0,("read_block: read() failed (%s)\n", strerror(errno) ));
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return False;
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}
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if ( (returned == 0) && (bytes_read < block_size) ) {
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DEBUG(0,("read_block: not a vald registry file ?\n" ));
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return False;
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}
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bytes_read += returned;
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}
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return bytes_read;
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}
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/*******************************************************************
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*******************************************************************/
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static bool write_hbin_block( REGF_FILE *file, REGF_HBIN *hbin )
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{
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if ( !hbin->dirty )
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return True;
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/* write free space record if any is available */
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if ( hbin->free_off != REGF_OFFSET_NONE ) {
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uint32 header = 0xffffffff;
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if ( !prs_set_offset( &hbin->ps, hbin->free_off-sizeof(uint32) ) )
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return False;
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if ( !prs_uint32( "free_size", &hbin->ps, 0, &hbin->free_size ) )
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return False;
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if ( !prs_uint32( "free_header", &hbin->ps, 0, &header ) )
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return False;
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}
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hbin->dirty = (write_block( file, &hbin->ps, hbin->file_off ) != -1);
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return hbin->dirty;
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}
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/*******************************************************************
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*******************************************************************/
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static bool hbin_block_close( REGF_FILE *file, REGF_HBIN *hbin )
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{
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REGF_HBIN *p;
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/* remove the block from the open list and flush it to disk */
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for ( p=file->block_list; p && p!=hbin; p=p->next )
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;;
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if ( p == hbin ) {
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DLIST_REMOVE( file->block_list, hbin );
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}
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else
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DEBUG(0,("hbin_block_close: block not in open list!\n"));
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if ( !write_hbin_block( file, hbin ) )
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return False;
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return True;
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}
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/*******************************************************************
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*******************************************************************/
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static bool prs_regf_block( const char *desc, prs_struct *ps, int depth, REGF_FILE *file )
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{
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prs_debug(ps, depth, desc, "prs_regf_block");
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depth++;
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if ( !prs_uint8s( True, "header", ps, depth, (uint8*)file->header, sizeof( file->header )) )
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return False;
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/* yes, these values are always identical so store them only once */
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if ( !prs_uint32( "unknown1", ps, depth, &file->unknown1 ))
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return False;
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if ( !prs_uint32( "unknown1 (again)", ps, depth, &file->unknown1 ))
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return False;
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/* get the modtime */
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if ( !prs_set_offset( ps, 0x0c ) )
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return False;
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if ( !smb_io_time( "modtime", &file->mtime, ps, depth ) )
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return False;
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/* constants */
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if ( !prs_uint32( "unknown2", ps, depth, &file->unknown2 ))
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return False;
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if ( !prs_uint32( "unknown3", ps, depth, &file->unknown3 ))
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return False;
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if ( !prs_uint32( "unknown4", ps, depth, &file->unknown4 ))
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return False;
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if ( !prs_uint32( "unknown5", ps, depth, &file->unknown5 ))
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return False;
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/* get file offsets */
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if ( !prs_set_offset( ps, 0x24 ) )
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return False;
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if ( !prs_uint32( "data_offset", ps, depth, &file->data_offset ))
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return False;
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if ( !prs_uint32( "last_block", ps, depth, &file->last_block ))
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return False;
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/* one more constant */
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if ( !prs_uint32( "unknown6", ps, depth, &file->unknown6 ))
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return False;
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/* get the checksum */
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if ( !prs_set_offset( ps, 0x01fc ) )
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return False;
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if ( !prs_uint32( "checksum", ps, depth, &file->checksum ))
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return False;
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return True;
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}
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/*******************************************************************
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*******************************************************************/
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static bool prs_hbin_block( const char *desc, prs_struct *ps, int depth, REGF_HBIN *hbin )
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{
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uint32 block_size2;
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prs_debug(ps, depth, desc, "prs_regf_block");
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depth++;
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if ( !prs_uint8s( True, "header", ps, depth, (uint8*)hbin->header, sizeof( hbin->header )) )
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return False;
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if ( !prs_uint32( "first_hbin_off", ps, depth, &hbin->first_hbin_off ))
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return False;
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/* The dosreg.cpp comments say that the block size is at 0x1c.
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According to a WINXP NTUSER.dat file, this is wrong. The block_size
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is at 0x08 */
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if ( !prs_uint32( "block_size", ps, depth, &hbin->block_size ))
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return False;
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block_size2 = hbin->block_size;
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prs_set_offset( ps, 0x1c );
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if ( !prs_uint32( "block_size2", ps, depth, &block_size2 ))
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return False;
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if ( MARSHALLING(ps) )
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hbin->dirty = True;
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return True;
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}
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/*******************************************************************
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*******************************************************************/
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static bool prs_nk_rec( const char *desc, prs_struct *ps, int depth, REGF_NK_REC *nk )
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{
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uint16 class_length, name_length;
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uint32 start;
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uint32 data_size, start_off, end_off;
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uint32 unknown_off = REGF_OFFSET_NONE;
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nk->hbin_off = prs_offset( ps );
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start = nk->hbin_off;
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prs_debug(ps, depth, desc, "prs_nk_rec");
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depth++;
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/* back up and get the data_size */
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if ( !prs_set_offset( ps, prs_offset(ps)-sizeof(uint32)) )
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return False;
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start_off = prs_offset( ps );
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if ( !prs_uint32( "rec_size", ps, depth, &nk->rec_size ))
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return False;
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if ( !prs_uint8s( True, "header", ps, depth, (uint8*)nk->header, sizeof( nk->header )) )
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return False;
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if ( !prs_uint16( "key_type", ps, depth, &nk->key_type ))
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return False;
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if ( !smb_io_time( "mtime", &nk->mtime, ps, depth ))
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return False;
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if ( !prs_set_offset( ps, start+0x0010 ) )
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return False;
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if ( !prs_uint32( "parent_off", ps, depth, &nk->parent_off ))
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return False;
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if ( !prs_uint32( "num_subkeys", ps, depth, &nk->num_subkeys ))
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return False;
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if ( !prs_set_offset( ps, start+0x001c ) )
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return False;
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if ( !prs_uint32( "subkeys_off", ps, depth, &nk->subkeys_off ))
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return False;
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if ( !prs_uint32( "unknown_off", ps, depth, &unknown_off) )
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return False;
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if ( !prs_set_offset( ps, start+0x0024 ) )
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return False;
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if ( !prs_uint32( "num_values", ps, depth, &nk->num_values ))
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return False;
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if ( !prs_uint32( "values_off", ps, depth, &nk->values_off ))
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return False;
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if ( !prs_uint32( "sk_off", ps, depth, &nk->sk_off ))
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return False;
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if ( !prs_uint32( "classname_off", ps, depth, &nk->classname_off ))
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return False;
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if ( !prs_uint32( "max_bytes_subkeyname", ps, depth, &nk->max_bytes_subkeyname))
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return False;
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if ( !prs_uint32( "max_bytes_subkeyclassname", ps, depth, &nk->max_bytes_subkeyclassname))
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return False;
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if ( !prs_uint32( "max_bytes_valuename", ps, depth, &nk->max_bytes_valuename))
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return False;
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if ( !prs_uint32( "max_bytes_value", ps, depth, &nk->max_bytes_value))
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return False;
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if ( !prs_uint32( "unknown index", ps, depth, &nk->unk_index))
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return False;
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name_length = nk->keyname ? strlen(nk->keyname) : 0 ;
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class_length = nk->classname ? strlen(nk->classname) : 0 ;
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if ( !prs_uint16( "name_length", ps, depth, &name_length ))
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return False;
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if ( !prs_uint16( "class_length", ps, depth, &class_length ))
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return False;
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if ( class_length ) {
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;;
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}
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if ( name_length ) {
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if ( UNMARSHALLING(ps) ) {
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if ( !(nk->keyname = PRS_ALLOC_MEM( ps, char, name_length+1 )) )
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return False;
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}
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if ( !prs_uint8s( True, "name", ps, depth, (uint8*)nk->keyname, name_length) )
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return False;
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if ( UNMARSHALLING(ps) )
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nk->keyname[name_length] = '\0';
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}
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end_off = prs_offset( ps );
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/* data_size must be divisible by 8 and large enough to hold the original record */
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data_size = ((start_off - end_off) & 0xfffffff8 );
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if ( data_size > nk->rec_size )
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DEBUG(10,("Encountered reused record (0x%x < 0x%x)\n", data_size, nk->rec_size));
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if ( MARSHALLING(ps) )
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nk->hbin->dirty = True;
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return True;
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}
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/*******************************************************************
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*******************************************************************/
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static uint32 regf_block_checksum( prs_struct *ps )
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{
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char *buffer = prs_data_p( ps );
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uint32 checksum, x;
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int i;
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/* XOR of all bytes 0x0000 - 0x01FB */
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checksum = x = 0;
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for ( i=0; i<0x01FB; i+=4 ) {
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x = IVAL(buffer, i );
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checksum ^= x;
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}
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return checksum;
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}
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/*******************************************************************
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*******************************************************************/
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static bool read_regf_block( REGF_FILE *file )
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{
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prs_struct ps;
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uint32 checksum;
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/* grab the first block from the file */
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if ( read_block( file, &ps, 0, REGF_BLOCKSIZE ) == -1 )
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return False;
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/* parse the block and verify the checksum */
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if ( !prs_regf_block( "regf_header", &ps, 0, file ) )
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return False;
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checksum = regf_block_checksum( &ps );
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prs_mem_free( &ps );
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if ( file->checksum != checksum ) {
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DEBUG(0,("read_regf_block: invalid checksum\n" ));
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return False;
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}
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return True;
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}
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/*******************************************************************
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*******************************************************************/
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static REGF_HBIN* read_hbin_block( REGF_FILE *file, off_t offset )
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{
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REGF_HBIN *hbin;
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uint32 record_size, curr_off, block_size, header;
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if ( !(hbin = talloc_zero(file->mem_ctx, REGF_HBIN)) )
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return NULL;
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hbin->file_off = offset;
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hbin->free_off = -1;
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if ( read_block( file, &hbin->ps, offset, 0 ) == -1 )
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return NULL;
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if ( !prs_hbin_block( "hbin", &hbin->ps, 0, hbin ) )
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return NULL;
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/* this should be the same thing as hbin->block_size but just in case */
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|
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 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;
|
|
|
|
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 NULL;
|
|
|
|
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->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 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;
|
|
|
|
{
|
|
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_data_size(&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 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, 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, "", "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_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 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->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 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 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( 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( 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);
|
|
|
|
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 NULL;
|
|
|
|
update_free_space( hbin, size );
|
|
|
|
return hbin;
|
|
}
|
|
|
|
/*******************************************************************
|
|
*******************************************************************/
|
|
|
|
static uint32 sk_record_data_size( struct security_descriptor * sd )
|
|
{
|
|
uint32 size, size_mod8;
|
|
|
|
size_mod8 = 0;
|
|
|
|
/* the record size is sizeof(hdr) + name + static members + data_size_field */
|
|
|
|
size = sizeof(uint32)*5 + ndr_size_security_descriptor(sd, 0) + 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,
|
|
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) ) {
|
|
uint32 data_size = ( (vk->data_size+sizeof(uint32)) & 0xfffffff8 ) + 8;
|
|
|
|
vk->data = (uint8 *)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), 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_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 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, sizeof(uint32) );
|
|
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 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);
|
|
|
|
DLIST_ADD_END( file->sec_desc_list, nk->sec_desc, REGF_SK_REC *);
|
|
|
|
/* 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 lf_size = lf_record_data_size( nk->num_subkeys );
|
|
uint32 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 vlist_size = ( ( nk->num_values * sizeof(uint32) ) & 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 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;
|
|
}
|
|
|