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metasploit-framework/external/source/pxesploit/regeditor/ntreg.c

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/*
* ntreg.c - NT Registry Hive access library
*
* 2010-jun: Patches from Frediano Ziglio adding support for wide characters
* and some bugfixes. Thank you!
* 2008-mar: Type QWORD (XP/Vista and newer) now recognized
* 2008-mar: Most functions accepting a path now also have a parameter specifying if
* the search should be exact or on first match basis
* 2008-mar: Fixed bug which skipped first indirect index table when deleting keys,
* usually leading to endless loop when recursive deleting.
* 2008-mar: Export to .reg file by Leo von Klenze, expanded a bit by me.
* 2008-mar: 64 bit compatible patch by Mike Doty, via Alon Bar-Lev
* http://bugs.gentoo.org/show_bug.cgi?id=185411
* 2007-sep: Verbosity/debug messages minor changes
* 2007-apr: LGPL license.
* 2004-aug: Deep indirect index support. NT351 support. Recursive delete.
* Debugged a lot in allocation routines. Still no expansion.
* 2004-jan: Verbosity updates
* 2003-jan: Allocation of new data, supports adding/deleting keys & stuff.
* Missing is expanding the file.
* 2003-jan: Seems there may be garbage pages at end of file, not zero pages
* now stops enumerating at first non 'hbin' page.
*
* NOTE: The API is not frozen. It can and will change every release.
*
*****
*
* NTREG - Window registry file reader / writer library
* Copyright (c) 1997-2010 Petter Nordahl-Hagen.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License.
*
* This library 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
* Lesser General Public License for more details.
* See file LGPL.txt for the full license.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include <inttypes.h>
#include "ntreg.h"
/* Set to abort() and debug on more critical errors */
#define DOCORE 1
#define ZEROFILL 1 /* Fill blocks with zeroes when allocating and deallocating */
#define ZEROFILLONLOAD 0 /* Fill blocks marked as unused/deallocated with zeroes on load. FOR DEBUG */
const char ntreg_version[] = "ntreg lib routines, v0.94.1 100627, (c) Petter N Hagen";
const char *val_types[REG_MAX+1] = {
"REG_NONE", "REG_SZ", "REG_EXPAND_SZ", "REG_BINARY", "REG_DWORD", /* 0 - 4 */
"REG_DWORD_BIG_ENDIAN", "REG_LINK", /* 5 - 6 */
"REG_MULTI_SZ", "REG_RESOUCE_LIST", "REG_FULL_RES_DESC", "REG_RES_REQ", /* 7 - 10 */
"REG_QWORD", /* 11 */
};
static char * string_regw2prog(void *string, int len);
static char * string_rega2prog(void *string, int len);
static char * string_prog2regw(void *string, int len, int* out_len);
static void string_prog2rega(char *string, int len);
/* Utility routines */
char *str_dup( const char *str )
{
char *str_new;
if (!str)
return 0 ;
CREATE( str_new, char, strlen(str) + 1 );
strcpy( str_new, str );
return str_new;
}
int fmyinput(char *prmpt, char *ibuf, int maxlen)
{
printf("%s",prmpt);
fgets(ibuf,maxlen+1,stdin);
ibuf[strlen(ibuf)-1] = 0;
return(strlen(ibuf));
}
/* Print len number of hexbytes */
void hexprnt(char *s, unsigned char *bytes, int len)
{
int i;
printf("%s",s);
for (i = 0; i < len; i++) {
printf("%02x ",bytes[i]);
}
printf("\n");
}
/* HexDump all or a part of some buffer */
void hexdump(char *hbuf, int start, int stop, int ascii)
{
char c;
int diff,i;
while (start < stop ) {
diff = stop - start;
if (diff > 16) diff = 16;
printf(":%05X ",start);
for (i = 0; i < diff; i++) {
printf("%02X ",(unsigned char)*(hbuf+start+i));
}
if (ascii) {
for (i = diff; i < 16; i++) printf(" ");
for (i = 0; i < diff; i++) {
c = *(hbuf+start+i);
printf("%c", isprint(c) ? c : '.');
}
}
printf("\n");
start += 16;
}
}
/* General search routine, find something in something else */
int find_in_buf(char *buf, char *what, int sz, int len, int start)
{
int i;
for (; start < sz; start++) {
for (i = 0; i < len; i++) {
if (*(buf+start+i) != *(what+i)) break;
}
if (i == len) return(start);
}
return(0);
}
/* Get INTEGER from memory. This is probably low-endian specific? */
int get_int( char *array )
{
return ((array[0]&0xff) + ((array[1]<<8)&0xff00) +
((array[2]<<16)&0xff0000) +
((array[3]<<24)&0xff000000));
}
/* Quick and dirty UNICODE to std. ascii */
void cheap_uni2ascii(char *src, char *dest, int l)
{
for (; l > 0; l -=2) {
*dest = *src;
dest++; src +=2;
}
*dest = 0;
}
/* Quick and dirty ascii to unicode */
void cheap_ascii2uni(char *src, char *dest, int l)
{
for (; l > 0; l--) {
*dest++ = *src++;
*dest++ = 0;
}
}
void skipspace(char **c)
{
while( **c == ' ' ) (*c)++;
}
int gethex(char **c)
{
int value;
skipspace(c);
if (!(**c)) return(0);
sscanf(*c,"%x",&value);
while( **c != ' ' && (**c)) (*c)++;
return(value);
}
/* Get a string of HEX bytes (space separated),
* or if first char is ' get an ASCII string instead.
*/
int gethexorstr(char **c, char *wb)
{
int l = 0;
skipspace(c);
if ( **c == '\'') {
(*c)++;
while ( **c ) {
*(wb++) = *((*c)++);
l++;
}
} else {
do {
*(wb++) = gethex(c);
l++;
skipspace(c);
} while ( **c );
}
return(l);
}
/* Simple buffer debugger, returns 1 if buffer dirty/edited */
int debugit(char *buf, int sz)
{
char inbuf[100],whatbuf[100],*bp;
int dirty=0,to,from,l,i,j,wlen,cofs = 0;
printf("Buffer debugger. '?' for help.\n");
while (1) {
l = fmyinput(".",inbuf,90);
bp = inbuf;
skipspace(&bp);
if (l > 0 && *bp) {
switch(*bp) {
case 'd' :
bp++;
if (*bp) {
from = gethex(&bp);
to = gethex(&bp);
} else {
from = cofs; to = 0;
}
if (to == 0) to = from + 0x100;
if (to > sz) to = sz;
hexdump(buf,from,to,1);
cofs = to;
break;
case 'a' :
bp++;
if (*bp) {
from = gethex(&bp);
to = gethex(&bp);
} else {
from = cofs; to = 0;
}
if (to == 0) to = from + 0x100;
if (to > sz) to = sz;
hexdump(buf,from,to,0);
cofs = to;
break;
#if 0
case 'k' :
bp++;
if (*bp) {
from = gethex(&bp);
} else {
from = cofs;
}
if (to > sz) to = sz;
parse_block(from,1);
cofs = to;
break;
#endif
#if 0
case 'l' :
bp++;
if (*bp) {
from = gethex(&bp);
} else {
from = cofs;
}
if (to > sz) to = sz;
nk_ls(from+4,0);
cofs = to;
break;
#endif
case 'q':
return(0);
break;
case 's':
if (!dirty) printf("Buffer has not changed, no need to write..\n");
return(dirty);
break;
case 'h':
bp++;
if (*bp == 'a') {
from = 0;
to = sz;
bp++;
} else {
from = gethex(&bp);
to = gethex(&bp);
}
wlen = gethexorstr(&bp,whatbuf);
if (to > sz) to = sz;
printf("from: %x, to: %x, wlen: %d\n",from,to,wlen);
for (i = from; i < to; i++) {
for (j = 0; j < wlen; j++) {
if ( *(buf+i+j) != *(whatbuf+j)) break;
}
if (j == wlen) printf("%06x ",i);
}
printf("\n");
break;
case ':':
bp++;
if (!*bp) break;
from = gethex(&bp);
wlen = gethexorstr(&bp,whatbuf);
printf("from: %x, wlen: %d\n",from,wlen);
memcpy(buf+from,whatbuf,wlen);
dirty = 1;
break;
#if 0
case 'p':
j = 0;
if (*(++bp) != 0) {
from = gethex(&bp);
}
if (*(++bp) != 0) {
j = gethex(&bp);
}
printf("from: %x, rid: %x\n",from,j);
seek_n_destroy(from,j,500,0);
break;
#endif
case '?':
printf("d [<from>] [<to>] - dump buffer within range\n");
printf("a [<from>] [<to>] - same as d, but without ascii-part (for cut'n'paste)\n");
printf(": <offset> <hexbyte> [<hexbyte> ...] - change bytes\n");
printf("h <from> <to> <hexbyte> [<hexbyte> ...] - hunt (search) for bytes\n");
printf("ha <hexbyte> [<hexbyte] - Hunt all (whole buffer)\n");
printf("s - save & quit\n");
printf("q - quit (no save)\n");
printf(" instead of <hexbyte> etc. you may give 'string to enter/search a string\n");
break;
default:
printf("?\n");
break;
}
}
}
}
/* ========================================================================= */
/* The following routines are mostly for debugging, I used it
* much during discovery. the -t command line option uses it,
* also the 'st' and 's' from the editor & hexdebugger.
* All offsets shown in these are unadjusted (ie you must add
* headerpage (most often 0x1000) to get file offset)
*/
/* Parse the nk datablock
* vofs = offset into struct (after size linkage)
*/
void parse_nk(struct hive *hdesc, int vofs, int blen)
{
struct nk_key *key;
int i;
printf("== nk at offset %0x\n",vofs);
/* #define D_OFFS2(o) ( (void *)&(key->o)-(void *)hdesc->buffer-vofs ) */
#define D_OFFS(o) ( (void *)&(key->o)-(void *)hdesc->buffer-vofs )
key = (struct nk_key *)(hdesc->buffer + vofs);
printf("%04lx type = 0x%02x %s\n", D_OFFS(type) ,key->type,
(key->type == KEY_ROOT ? "ROOT_KEY" : "") );
printf("%04lx timestamp skipped\n", D_OFFS(timestamp) );
printf("%04lx parent key offset = 0x%0x\n", D_OFFS(ofs_parent) ,key->ofs_parent);
printf("%04lx number of subkeys = %d\n", D_OFFS(no_subkeys),key->no_subkeys);
printf("%04lx lf-record offset = 0x%0x\n",D_OFFS(ofs_lf),key->ofs_lf);
printf("%04lx number of values = %d\n", D_OFFS(no_values),key->no_values);
printf("%04lx val-list offset = 0x%0x\n",D_OFFS(ofs_vallist),key->ofs_vallist);
printf("%04lx sk-record offset = 0x%0x\n",D_OFFS(ofs_sk),key->ofs_sk);
printf("%04lx classname offset = 0x%0x\n",D_OFFS(ofs_classnam),key->ofs_classnam);
printf("%04lx *unused?* = 0x%0x\n",D_OFFS(dummy4),key->dummy4);
printf("%04lx name length = %d\n", D_OFFS(len_name),key->len_name);
printf("%04lx classname length = %d\n", D_OFFS(len_classnam),key->len_classnam);
printf("%04lx Key name: <",D_OFFS(keyname) );
for(i = 0; i < key->len_name; i++) putchar(key->keyname[i]);
printf(">\n== End of key info.\n");
}
/* Parse the vk datablock
* vofs = offset into struct (after size linkage)
*/
void parse_vk(struct hive *hdesc, int vofs, int blen)
{
struct vk_key *key;
int i;
printf("== vk at offset %0x\n",vofs);
key = (struct vk_key *)(hdesc->buffer + vofs);
printf("%04lx name length = %d (0x%0x)\n", D_OFFS(len_name),
key->len_name, key->len_name );
printf("%04lx length of data = %d (0x%0x)\n", D_OFFS(len_data),
key->len_data, key->len_data );
printf("%04lx data offset = 0x%0x\n",D_OFFS(ofs_data),key->ofs_data);
printf("%04lx value type = 0x%0x %s\n", D_OFFS(val_type), key->val_type,
(key->val_type <= REG_MAX ? val_types[key->val_type] : "(unknown)") ) ;
printf("%04lx flag = 0x%0x\n",D_OFFS(flag),key->flag);
printf("%04lx *unused?* = 0x%0x\n",D_OFFS(dummy1),key->dummy1);
printf("%04lx Key name: <",D_OFFS(keyname) );
for(i = 0; i < key->len_name; i++) putchar(key->keyname[i]);
printf(">\n== End of key info.\n");
}
/* Parse the sk datablock
* Gee, this is the security info. Who cares? *evil grin*
* vofs = offset into struct (after size linkage)
*/
void parse_sk(struct hive *hdesc, int vofs, int blen)
{
struct sk_key *key;
/* int i; */
printf("== sk at offset %0x\n",vofs);
key = (struct sk_key *)(hdesc->buffer + vofs);
printf("%04lx *unused?* = %d\n" , D_OFFS(dummy1), key->dummy1 );
printf("%04lx Offset to prev sk = 0x%0x\n", D_OFFS(ofs_prevsk), key->ofs_prevsk);
printf("%04lx Offset to next sk = 0x%0x\n", D_OFFS(ofs_nextsk), key->ofs_nextsk);
printf("%04lx Usage counter = %d (0x%0x)\n", D_OFFS(no_usage),
key->no_usage,key->no_usage);
printf("%04lx Security data len = %d (0x%0x)\n", D_OFFS(len_sk),
key->len_sk,key->len_sk);
printf("== End of key info.\n");
}
/* Parse the lf datablock (>4.0 'nk' offsets lookuptable)
* vofs = offset into struct (after size linkage)
*/
void parse_lf(struct hive *hdesc, int vofs, int blen)
{
struct lf_key *key;
int i;
printf("== lf at offset %0x\n",vofs);
key = (struct lf_key *)(hdesc->buffer + vofs);
printf("%04lx number of keys = %d\n", D_OFFS(no_keys), key->no_keys );
for(i = 0; i < key->no_keys; i++) {
printf("%04lx %3d Offset: 0x%0x - <%c%c%c%c>\n",
D_OFFS(hash[i].ofs_nk), i,
key->hash[i].ofs_nk,
key->hash[i].name[0],
key->hash[i].name[1],
key->hash[i].name[2],
key->hash[i].name[3] );
}
printf("== End of key info.\n");
}
/* Parse the lh datablock (WinXP offsets lookuptable)
* vofs = offset into struct (after size linkage)
* The hash is most likely a base 37 conversion of the name string
*/
void parse_lh(struct hive *hdesc, int vofs, int blen)
{
struct lf_key *key;
int i;
printf("== lh at offset %0x\n",vofs);
key = (struct lf_key *)(hdesc->buffer + vofs);
printf("%04lx number of keys = %d\n", D_OFFS(no_keys), key->no_keys );
for(i = 0; i < key->no_keys; i++) {
printf("%04lx %3d Offset: 0x%0x - <hash: %08x>\n",
D_OFFS(lh_hash[i].ofs_nk), i,
key->lh_hash[i].ofs_nk,
key->lh_hash[i].hash );
}
printf("== End of key info.\n");
}
/* Parse the li datablock (3.x 'nk' offsets list)
* vofs = offset into struct (after size linkage)
*/
void parse_li(struct hive *hdesc, int vofs, int blen)
{
struct li_key *key;
int i;
printf("== li at offset %0x\n",vofs);
/* #define D_OFFS(o) ( (void *)&(key->o)-(void *)hdesc->buffer-vofs ) */
key = (struct li_key *)(hdesc->buffer + vofs);
printf("%04lx number of keys = %d\n", D_OFFS(no_keys), key->no_keys );
for(i = 0; i < key->no_keys; i++) {
printf("%04lx %3d Offset: 0x%0x\n",
D_OFFS(hash[i].ofs_nk), i,
key->hash[i].ofs_nk);
}
printf("== End of key info.\n");
}
/* Parse the ri subindex-datablock
* (Used to list li/lf/lh's when ~>500keys)
* vofs = offset into struct (after size linkage)
*/
void parse_ri(struct hive *hdesc, int vofs, int blen)
{
struct ri_key *key;
int i;
printf("== ri at offset %0x\n",vofs);
/* #define D_OFFS(o) ( (void *)&(key->o)-(void *)hdesc->buffer-vofs ) */
key = (struct ri_key *)(hdesc->buffer + vofs);
printf("%04lx number of subindices = %d\n", D_OFFS(no_lis), key->no_lis );
for(i = 0; i < key->no_lis; i++) {
printf("%04lx %3d Offset: 0x%0x\n",
D_OFFS(hash[i].ofs_li), i,
key->hash[i].ofs_li);
}
printf("== End of key info.\n");
}
/* Parse the datablock
* vofs = offset into struct (after size linkage)
*/
int parse_block(struct hive *hdesc, int vofs,int verbose)
{
unsigned short id;
int seglen;
seglen = get_int(hdesc->buffer+vofs);
if (verbose || seglen == 0) {
printf("** Block at offset %0x\n",vofs);
printf("seglen: %d, %u, 0x%0x\n",seglen,seglen,seglen);
}
if (seglen == 0) {
printf("Whoops! FATAL! Zero data block size! (not registry or corrupt file?)\n");
debugit(hdesc->buffer,hdesc->size);
return(0);
}
if (seglen < 0) {
seglen = -seglen;
hdesc->usetot += seglen;
hdesc->useblk++;
if (verbose) {
printf("USED BLOCK: %d, 0x%0x\n",seglen,seglen);
/* hexdump(hdesc->buffer,vofs,vofs+seglen+4,1); */
}
} else {
hdesc->unusetot += seglen;
hdesc->unuseblk++;
/* Useful to zero blocks we think are empty when debugging.. */
#if ZEROFILLONLOAD
bzero(hdesc->buffer+vofs+4,seglen-4);
#endif
if (verbose) {
printf("FREE BLOCK!\n");
/* hexdump(hdesc->buffer,vofs,vofs+seglen+4,1); */
}
}
/* printf("Seglen: 0x%02x\n",seglen & 0xff ); */
vofs += 4;
id = (*(hdesc->buffer + vofs)<<8) + *(hdesc->buffer+vofs+1);
if (verbose) {
switch (id) {
case 0x6e6b: /* nk */
parse_nk(hdesc, vofs, seglen);
break;
case 0x766b: /* vk */
parse_vk(hdesc, vofs, seglen);
break;
case 0x6c66: /* lf */
parse_lf(hdesc, vofs, seglen);
break;
case 0x6c68: /* lh */
parse_lh(hdesc, vofs, seglen);
break;
case 0x6c69: /* li */
parse_li(hdesc, vofs, seglen);
break;
case 0x736b: /* sk */
parse_sk(hdesc, vofs, seglen);
break;
case 0x7269: /* ri */
parse_ri(hdesc, vofs, seglen);
break;
default:
printf("value data, or not handeled yet!\n");
break;
}
}
return(seglen);
}
/* ================================================================ */
/* Scan and allocation routines */
/* Find start of page given a current pointer into the buffer
* hdesc = hive
* vofs = offset pointer into buffer
* returns: offset to start of page (and page header)
*/
int find_page_start(struct hive *hdesc, int vofs)
{
int r,prev;
struct hbin_page *h;
/* Again, assume start at 0x1000 */
r = 0x1000;
while (r < hdesc->size) {
prev = r;
h = (struct hbin_page *)(hdesc->buffer + r);
if (h->id != 0x6E696268) return(0);
if (h->ofs_next == 0) {
printf("find_page_start: zero len or ofs_next found in page at 0x%x\n",r);
return(0);
}
r += h->ofs_next;
if (r > vofs) return (prev);
}
return(0);
}
/* Find free space in page
* size = requested size in bytes
* pofs = offset to start of actual page header
* returns: offset to free block, or 0 for error
*/
#define FB_DEBUG 0
int find_free_blk(struct hive *hdesc, int pofs, int size)
{
int vofs = pofs + 0x20;
int seglen;
struct hbin_page *p;
p = (struct hbin_page *)(hdesc->buffer + pofs);
while (vofs-pofs < (p->ofs_next - HBIN_ENDFILL)) {
seglen = get_int(hdesc->buffer+vofs);
#if FB_DEBUG
printf("** Block at offset %0x\n",vofs);
printf("seglen: %d, %u, 0x%0x\n",seglen,seglen,seglen);
#endif
if (seglen == 0) {
printf("find_free_blk: FATAL! Zero data block size! (not registry or corrupt file?)\n");
debugit(hdesc->buffer,hdesc->size);
return(0);
}
if (seglen < 0) {
seglen = -seglen;
#if FB_DEBUG
printf("USED BLOCK: %d, 0x%0x\n",seglen,seglen);
#endif
/* hexdump(hdesc->buffer,vofs,vofs+seglen+4,1); */
} else {
#if FB_DEBUG
printf("FREE BLOCK!\n");
#endif
/* hexdump(hdesc->buffer,vofs,vofs+seglen+4,1); */
if (seglen >= size) {
#if FB_DEBUG
printf("find_free_blk: found size %d block at 0x%x\n",seglen,vofs);
#endif
#if 0
if (vofs == 0x19fb8) {
printf("find_free_blk: vofs = %x, seglen = %x\n",vofs,seglen);
debugit(hdesc->buffer,hdesc->size);
abort();
}
#endif
return(vofs);
}
}
vofs += seglen;
}
return(0);
}
#undef FB_DEBUG
/* Search pages from start to find free block
* hdesc - hive
* size - space requested, in bytes
* returns: offset to free block, 0 if not found or error
*/
int find_free(struct hive *hdesc, int size)
{
int r,blk;
struct hbin_page *h;
/* Align to 8 byte boundary */
if (size & 7) size += (8 - (size & 7));
/* Again, assume start at 0x1000 */
r = 0x1000;
while (r < hdesc->size) {
h = (struct hbin_page *)(hdesc->buffer + r);
if (h->id != 0x6E696268) return(0);
if (h->ofs_next == 0) {
printf("find_free: zero len or ofs_next found in page at 0x%x\n",r);
return(0);
}
blk = find_free_blk(hdesc,r,size);
if (blk) return (blk);
r += h->ofs_next;
}
return(0);
}
/* Allocate a block of requested size if possible
* hdesc - hive
* pofs - If >0 will try this page first (ptr may be inside page)
* size - number of bytes to allocate
* returns: 0 - failed, else pointer to allocated block.
* This function WILL CHANGE THE HIVE (change block linkage) if it
* succeeds.
*/
int alloc_block(struct hive *hdesc, int ofs, int size)
{
int pofs = 0;
int blk = 0;
int trail, trailsize, oldsz;
if (hdesc->state & HMODE_NOALLOC) {
printf("alloc_block: ERROR: Hive %s is in no allocation safe mode,"
"new space not allocated. Operation will fail!\n", hdesc->filename);
return(0);
}
size += 4; /* Add linkage */
if (size & 7) size += (8 - (size & 7));
/* Check current page first */
if (ofs) {
pofs = find_page_start(hdesc,ofs);
blk = find_free_blk(hdesc,pofs,size);
}
/* Then check whole hive */
if (!blk) {
blk = find_free(hdesc,size);
}
if (blk) { /* Got the space */
oldsz = get_int(hdesc->buffer+blk);
#if 0
printf("Block at : %x\n",blk);
printf("Old block size is: %x\n",oldsz);
printf("New block size is: %x\n",size);
#endif
trailsize = oldsz - size;
if (trailsize == 4) {
trailsize = 0;
size += 4;
}
#if 1
if (trailsize & 7) { /* Trail must be 8 aligned */
trailsize -= (8 - (trailsize & 7));
size += (8 - (trailsize & 7));
}
if (trailsize == 4) {
trailsize = 0;
size += 4;
}
#endif
#if 0
printf("trail after comp: %x\n",trailsize);
printf("size after comp: %x\n",size);
#endif
/* Now change pointers on this to reflect new size */
*(int *)((hdesc->buffer)+blk) = -(size);
/* If the fit was exact (unused block was same size as wee need)
* there is no need for more, else make free block after end
* of newly allocated one */
hdesc->useblk++;
hdesc->unuseblk--;
hdesc->usetot += size;
hdesc->unusetot -= size;
if (trailsize) {
trail = blk + size;
*(int *)((hdesc->buffer)+trail) = (int)trailsize;
hdesc->useblk++; /* This will keep blockcount */
hdesc->unuseblk--;
hdesc->usetot += 4; /* But account for more linkage bytes */
hdesc->unusetot -= 4;
}
/* Clear the block data, makes it easier to debug */
#if ZEROFILL
bzero( (void *)(hdesc->buffer+blk+4), size-4);
#endif
hdesc->state |= HMODE_DIRTY;
return(blk);
} else {
printf("alloc_block: failed to alloc %d bytes, and hive expansion not implemented yet!\n",size);
}
return(0);
}
/* Free a block in registry
* hdesc - hive
* blk - offset of block, MUST POINT TO THE LINKAGE!
* returns bytes freed (incl linkage bytes) or 0 if fail
* Will CHANGE HIVE IF SUCCESSFUL (changes linkage)
*/
#define FB_DEBUG 0
int free_block(struct hive *hdesc, int blk)
{
int pofs,vofs,seglen,prev,next,nextsz,prevsz,size;
struct hbin_page *p;
if (hdesc->state & HMODE_NOALLOC) {
printf("free_block: ERROR: Hive %s is in no allocation safe mode,"
"space not freed. Operation will fail!\n", hdesc->filename);
return(0);
}
size = get_int(hdesc->buffer+blk);
if (size >= 0) {
printf("free_block: trying to free already free block!\n");
#ifdef DOCORE
printf("blk = %x\n",blk);
debugit(hdesc->buffer,hdesc->size);
abort();
#endif
return(0);
}
size = -size;
/* So, we must find start of the block BEFORE us */
pofs = find_page_start(hdesc,blk);
if (!pofs) return(0);
p = (struct hbin_page *)(hdesc->buffer + pofs);
vofs = pofs + 0x20;
prevsz = -32;
if (vofs != blk) { /* Block is not at start of page? */
while (vofs-pofs < (p->ofs_next - HBIN_ENDFILL) ) {
seglen = get_int(hdesc->buffer+vofs);
if (seglen == 0) {
printf("free_block: EEEK! Zero data block size! (not registry or corrupt file?)\n");
debugit(hdesc->buffer,hdesc->size);
return(0);
}
if (seglen < 0) {
seglen = -seglen;
/* hexdump(hdesc->buffer,vofs,vofs+seglen+4,1); */
}
prev = vofs;
vofs += seglen;
if (vofs == blk) break;
}
if (vofs != blk) {
printf("free_block: ran off end of page!?!? Error in chains?\n");
#ifdef DOCORE
printf("vofs = %x, pofs = %x, blk = %x\n",vofs,pofs,blk);
debugit(hdesc->buffer,hdesc->size);
abort();
#endif
return(0);
}
prevsz = get_int(hdesc->buffer+prev);
}
/* We also need details on next block (unless at end of page) */
next = blk + size;
nextsz = 0;
if (next-pofs < (p->ofs_next - HBIN_ENDFILL) ) nextsz = get_int(hdesc->buffer+next);
#if 0
printf("offset prev : %x , blk: %x , next: %x\n",prev,blk,next);
printf("size prev : %x , blk: %x , next: %x\n",prevsz,size,nextsz);
#endif
/* Now check if next block is free, if so merge it with the one to be freed */
if ( nextsz > 0) {
#if 0
printf("Swallow next\n");
#endif
size += nextsz; /* Swallow it in current block */
hdesc->useblk--;
hdesc->usetot -= 4;
hdesc->unusetot -= 4; /* FIXME !??!?? */
}
/* Now free the block (possibly with ajusted size as above) */
#if ZEROFILL
bzero( (void *)(hdesc->buffer+blk), size);
#endif
*(int *)((hdesc->buffer)+blk) = (int)size;
hdesc->usetot -= size;
hdesc->unusetot -= size; /* FIXME !?!? */
hdesc->unuseblk--;
hdesc->state |= HMODE_DIRTY;
/* Check if previous block is also free, if so, merge.. */
if (prevsz > 0) {
#if 0
printf("Swallow prev\n");
#endif
hdesc->usetot -= prevsz;
hdesc->unusetot += prevsz;
prevsz += size;
/* And swallow current.. */
#if ZEROFILL
bzero( (void *)(hdesc->buffer+prev), prevsz);
#endif
*(int *)((hdesc->buffer)+prev) = (int)prevsz;
hdesc->useblk--;
return(prevsz);
}
return(size);
}
/* ================================================================ */
/* ** Registry manipulation routines ** */
/* "directory scan", return next name/pointer of a subkey on each call
* nkofs = offset to directory to scan
* lfofs = pointer to int to hold the current scan position,
* set position to 0 to start.
* sptr = pointer to struct to hold a single result
* returns: -1 = error. 0 = end of key. 1 = more subkeys to scan
* NOTE: caller must free the name-buffer (struct ex_data *name)
*/
int ex_next_n(struct hive *hdesc, int nkofs, int *count, int *countri, struct ex_data *sptr)
{
struct nk_key *key, *newnkkey;
int newnkofs;
struct lf_key *lfkey;
struct li_key *likey;
struct ri_key *rikey;
if (!nkofs) return(-1);
key = (struct nk_key *)(hdesc->buffer + nkofs);
if (key->id != 0x6b6e) {
printf("ex_next error: Not a 'nk' node at 0x%0x\n",nkofs);
return(-1);
}
#define EXNDEBUG 0
lfkey = (struct lf_key *)(hdesc->buffer + key->ofs_lf + 0x1004);
rikey = (struct ri_key *)(hdesc->buffer + key->ofs_lf + 0x1004);
if (rikey->id == 0x6972) { /* Is it extended 'ri'-block? */
#if EXNDEBUG
printf("%d , %d\n",*countri,*count);
#endif
if (*countri < 0 || *countri >= rikey->no_lis) { /* End of ri's? */
return(0);
}
/* Get the li of lf-struct that's current based on countri */
likey = (struct li_key *)( hdesc->buffer + rikey->hash[*countri].ofs_li + 0x1004 ) ;
if (likey->id == 0x696c) {
newnkofs = likey->hash[*count].ofs_nk + 0x1000;
} else {
lfkey = (struct lf_key *)( hdesc->buffer + rikey->hash[*countri].ofs_li + 0x1004 ) ;
newnkofs = lfkey->hash[*count].ofs_nk + 0x1000;
}
/* Check if current li/lf is exhausted */
#if EXNDEBUG
printf("likey->no_keys = %d\n",likey->no_keys);
#endif
if (*count >= likey->no_keys-1) { /* Last legal entry in li list? */
(*countri)++; /* Bump up ri count so we take next ri entry next time */
(*count) = -1; /* Reset li traverse counter for next round, not used later here */
}
} else { /* Plain handler */
if (key->no_subkeys <= 0 || *count >= key->no_subkeys) {
return(0);
}
if (lfkey->id == 0x696c) { /* Is it 3.x 'li' instead? */
likey = (struct li_key *)(hdesc->buffer + key->ofs_lf + 0x1004);
newnkofs = likey->hash[*count].ofs_nk + 0x1000;
} else {
newnkofs = lfkey->hash[*count].ofs_nk + 0x1000;
}
}
sptr->nkoffs = newnkofs;
newnkkey = (struct nk_key *)(hdesc->buffer + newnkofs + 4);
sptr->nk = newnkkey;
if (newnkkey->id != 0x6b6e) {
printf("ex_next: ERROR: not 'nk' node at 0x%0x\n",newnkofs);
return(-1);
} else {
if (newnkkey->len_name <= 0) {
printf("ex_next: nk at 0x%0x has no name!\n",newnkofs);
} else if (newnkkey->type & 0x20) {
#if 0
printf("dummy1 %x\n", *((int*)newnkkey->dummy1));
printf("dummy2 %x\n", *((int*)newnkkey->dummy2));
printf("type %x\n", newnkkey->type);
printf("timestamp+8 %x\n", *((int*)(newnkkey->timestamp+8)));
printf("dummy3+0 %x\n", *((int*)(newnkkey->dummy3+0)));
printf("dummy3+4 %x\n", *((int*)(newnkkey->dummy3+4)));
printf("dummy3+8 %x\n", *((int*)(newnkkey->dummy3+8)));
printf("dummy3+12 %x\n", *((int*)(newnkkey->dummy3+12)));
printf("dummy4 %x\n", *((int*)&newnkkey->dummy4));
printf("len %d\n", newnkkey->len_name);
printf("len class %d\n", newnkkey->len_classnam);
fflush(stdout);
#endif
sptr->name = string_rega2prog(newnkkey->keyname, newnkkey->len_name);
} else {
sptr->name = string_regw2prog(newnkkey->keyname, newnkkey->len_name);
}
} /* if */
(*count)++;
return(1);
/* return( *count <= key->no_subkeys); */
}
/* "directory scan" for VALUES, return next name/pointer of a value on each call
* nkofs = offset to directory to scan
* lfofs = pointer to int to hold the current scan position,
* set position to 0 to start.
* sptr = pointer to struct to hold a single result
* returns: -1 = error. 0 = end of key. 1 = more values to scan
* NOTE: caller must free the name-buffer (struct vex_data *name)
*/
int ex_next_v(struct hive *hdesc, int nkofs, int *count, struct vex_data *sptr)
{
struct nk_key *key /* , *newnkkey */ ;
int vkofs,vlistofs;
int *vlistkey;
struct vk_key *vkkey;
if (!nkofs) return(-1);
key = (struct nk_key *)(hdesc->buffer + nkofs);
if (key->id != 0x6b6e) {
printf("ex_next_v error: Not a 'nk' node at 0x%0x\n",nkofs);
return(-1);
}
if (key->no_values <= 0 || *count >= key->no_values) {
return(0);
}
vlistofs = key->ofs_vallist + 0x1004;
vlistkey = (int *)(hdesc->buffer + vlistofs);
vkofs = vlistkey[*count] + 0x1004;
vkkey = (struct vk_key *)(hdesc->buffer + vkofs);
if (vkkey->id != 0x6b76) {
printf("ex_next_v: hit non valuekey (vk) node during scan at offs 0x%0x\n",vkofs);
return(-1);
}
/* parse_vk(hdesc, vkofs, 4); */
sptr->vk = vkkey;
sptr->vkoffs = vkofs;
sptr->name = 0;
sptr->size = (vkkey->len_data & 0x7fffffff);
if (vkkey->len_name >0) {
if (vkkey->flag & 1) {
sptr->name = string_rega2prog(vkkey->keyname, vkkey->len_name);
} else {
sptr->name = string_regw2prog(vkkey->keyname, vkkey->len_name);
}
} else {
sptr->name = str_dup("");
}
sptr->type = vkkey->val_type;
if (sptr->size) {
if (vkkey->val_type == REG_DWORD) {
if (vkkey->len_data & 0x80000000) {
sptr->val = (int)(vkkey->ofs_data);
}
}
} else if (vkkey->len_data == 0x80000000) {
/* Data SIZE is 0, high bit set: special inline case, data is DWORD and in TYPE field!! */
/* Used a lot in SAM, and maybe in SECURITY I think */
sptr->val = (int)(vkkey->val_type);
sptr->size = 4;
sptr->type = REG_DWORD;
} else {
sptr->val = 0;
sptr->size = 0;
}
(*count)++;
return( *count <= key->no_values );
}
/* traceback - trace nk's back to root,
* building path string as we go.
* nkofs = offset to nk-node
* path = pointer to pathstring-buffer
* maxlen = max length of path-buffer
* return: length of path string
*/
int get_abs_path(struct hive *hdesc, int nkofs, char *path, int maxlen)
{
/* int newnkofs; */
struct nk_key *key;
char tmp[ABSPATHLEN+1];
char *keyname;
int len_name;
maxlen = (maxlen < ABSPATHLEN ? maxlen : ABSPATHLEN);
key = (struct nk_key *)(hdesc->buffer + nkofs);
if (key->id != 0x6b6e) {
printf("get_abs_path: Not a 'nk' node!\n");
return(0);
}
if (key->type == KEY_ROOT) { /* We're at the root */
return(strlen(path));
}
strncpy(tmp,path,ABSPATHLEN-1);
if (key->type & 0x20)
keyname = string_rega2prog(key->keyname, key->len_name);
else
keyname = string_regw2prog(key->keyname, key->len_name);
len_name = strlen(keyname);
if ( (strlen(path) + len_name) >= maxlen-6) {
free(keyname);
snprintf(path,maxlen,"(...)%s",tmp);
return(strlen(path)); /* Stop trace when string exhausted */
}
*path = '\\';
memcpy(path+1,keyname,len_name);
free(keyname);
strncpy(path+len_name+1,tmp,maxlen-6-len_name);
return(get_abs_path(hdesc, key->ofs_parent+0x1004, path, maxlen)); /* go back one more */
}
/* Value index table lookup
* hdesc - hive as usual
* vlistofs - offset of table
* name - value name to look for
* returns index into table or -1 if err
*/
int vlist_find(struct hive *hdesc, int vlistofs, int numval, char *name, int type)
{
struct vk_key *vkkey;
int i,vkofs,len;
int32_t *vlistkey;
len = strlen(name);
vlistkey = (int32_t *)(hdesc->buffer + vlistofs);
for (i = 0; i < numval; i++) {
vkofs = vlistkey[i] + 0x1004;
vkkey = (struct vk_key *)(hdesc->buffer + vkofs);
if (vkkey->len_name == 0 && *name == '@') { /* @ is alias for nameless value */
return(i);
}
if ( !(type & TPF_EXACT) || vkkey->len_name == len ) {
if (!strncmp(name, vkkey->keyname, len)) { /* name match? */
return(i);
}
}
}
return(-1);
}
/* Recursevely follow 'nk'-nodes based on a path-string,
* returning offset of last 'nk' or 'vk'
* vofs - offset to start node
* path - null-terminated pathname (relative to vofs, \ is separator)
* type - type to return TPF_??, see ntreg.h
* return: offset to nk or vk (or NULL if not found)
*/
int trav_path(struct hive *hdesc, int vofs, char *path, int type)
{
struct nk_key *key, *newnkkey;
struct lf_key *lfkey;
struct li_key *likey;
struct ri_key *rikey;
int32_t *vlistkey;
int newnkofs, plen, i, lfofs, vlistofs, adjust, r, ricnt, subs;
char *buf;
char part[ABSPATHLEN+1];
char *partptr;
if (!hdesc) return(0);
buf = hdesc->buffer;
if (!vofs) vofs = hdesc->rootofs+4; /* No current key given , so start at root */
if (*path == '\\' && *(path+1) != '\\') { /* Start from root if path starts with \ */
path++;
vofs = hdesc->rootofs+4;
}
key = (struct nk_key *)(buf + vofs);
/* printf("check of nk at offset: 0x%0x\n",vofs); */
if (key->id != 0x6b6e) {
printf("trav_path: Error: Not a 'nk' node!\n");
return(0);
}
/* Find \ delimiter or end of string, copying to name part buffer as we go,
rewriting double \\s */
partptr = part;
for(plen = 0; path[plen] && (path[plen] != '\\' || path[plen+1] == '\\'); plen++) {
if (path[plen] == '\\' && path[plen+1] == '\\') plen++; /* Skip one if double */
*partptr++ = path[plen];
}
*partptr = '\0';
/* printf("Name component: <%s>\n",part); */
adjust = (path[plen] == '\\' ) ? 1 : 0;
/* printf("Checking for <%s> with len %d\n",path,plen); */
if (!plen) return(vofs-4); /* Path has no lenght - we're there! */
if ( (plen == 1) && (*path == '.') && !(type & TPF_EXACT)) { /* Handle '.' current dir */
return(trav_path(hdesc,vofs,path+plen+adjust,type));
}
if ( !(type & TPF_EXACT) && (plen == 2) && !strncmp("..",path,2) ) { /* Get parent key */
newnkofs = key->ofs_parent + 0x1004;
/* Return parent (or only root if at the root) */
return(trav_path(hdesc, (key->type == KEY_ROOT ? vofs : newnkofs), path+plen+adjust, type));
}
/* at last name of path, and we want vk, and the nk has values */
if (!path[plen] && (type & TPF_VK) && key->no_values) {
/* printf("VK namematch for <%s>\n",part); */
vlistofs = key->ofs_vallist + 0x1004;
vlistkey = (int32_t *)(buf + vlistofs);
i = vlist_find(hdesc, vlistofs, key->no_values, part, type);
if (i != -1) {
return(vlistkey[i] + 0x1000);
}
}
if (key->no_subkeys > 0) { /* If it has subkeys, loop through the hash */
char *partw = NULL;
int partw_len, part_len;
lfofs = key->ofs_lf + 0x1004; /* lf (hash) record */
lfkey = (struct lf_key *)(buf + lfofs);
if (lfkey->id == 0x6972) { /* ri struct need special parsing */
/* Prime loop state */
rikey = (struct ri_key *)lfkey;
ricnt = rikey->no_lis;
r = 0;
likey = (struct li_key *)( hdesc->buffer + rikey->hash[r].ofs_li + 0x1004 ) ;
subs = likey->no_keys;
if (likey->id != 0x696c) { /* Bwah, not li anyway, XP uses lh usually which is actually smarter */
lfkey = (struct lf_key *)( hdesc->buffer + rikey->hash[r].ofs_li + 0x1004 ) ;
likey = NULL;
}
} else {
if (lfkey->id == 0x696c) { /* li? */
likey = (struct li_key *)(buf + lfofs);
} else {
likey = NULL;
}
rikey = NULL;
ricnt = 0; r = 0; subs = key->no_subkeys;
}
partw = string_prog2regw(part, partptr-part, &partw_len);
string_prog2rega(part, partptr-part);
part_len = strlen(part);
do {
for(i = 0; i < subs; i++) {
if (likey) newnkofs = likey->hash[i].ofs_nk + 0x1004;
else newnkofs = lfkey->hash[i].ofs_nk + 0x1004;
newnkkey = (struct nk_key *)(buf + newnkofs);
if (newnkkey->id != 0x6b6e) {
printf("ERROR: not 'nk' node! (strange?)\n");
} else {
if (newnkkey->len_name <= 0) {
printf("[No name]\n");
} else {
int cmp;
if (newnkkey->type & 0x20)
cmp = strncmp(part,newnkkey->keyname,part_len);
else
cmp = memcmp(partw, newnkkey->keyname, partw_len);
if (!cmp) {
/* printf("Key at 0x%0x matches! recursing!\n",newnkofs); */
free(partw);
return(trav_path(hdesc, newnkofs, path+plen+adjust, type));
}
}
} /* if id OK */
} /* hash loop */
r++;
if (ricnt && r < ricnt) {
newnkofs = rikey->hash[r].ofs_li;
likey = (struct li_key *)( hdesc->buffer + newnkofs + 0x1004 ) ;
subs = likey->no_keys;
if (likey->id != 0x696c) { /* Bwah, not li anyway, XP uses lh usually which is actually smarter */
lfkey = (struct lf_key *)( hdesc->buffer + rikey->hash[r].ofs_li + 0x1004 ) ;
likey = NULL;
}
}
} while (r < ricnt && ricnt);
free(partw);
} /* if subkeys */
/* Not found */
return(0);
}
/* ls - list a 'nk' nodes subkeys and values
* vofs - offset to start of data (skipping block linkage)
* type - 0 = full, 1 = keys only. 2 = values only
*/
void nk_ls(struct hive *hdesc, char *path, int vofs, int type)
{
struct nk_key *key;
int nkofs;
struct ex_data ex;
struct vex_data vex;
int count = 0, countri = 0;
nkofs = trav_path(hdesc, vofs, path, 0);
if(!nkofs) {
printf("nk_ls: Key <%s> not found\n",path);
return;
}
nkofs += 4;
key = (struct nk_key *)(hdesc->buffer + nkofs);
VERBF(hdesc,"ls of node at offset 0x%0x\n",nkofs);
if (key->id != 0x6b6e) {
printf("Error: Not a 'nk' node!\n");
debugit(hdesc->buffer,hdesc->size);
}
printf("Node has %d subkeys and %d values",key->no_subkeys,key->no_values);
if (key->len_classnam) printf(", and class-data of %d bytes",key->len_classnam);
printf("\n");
if (key->no_subkeys) {
printf(" key name\n");
while ((ex_next_n(hdesc, nkofs, &count, &countri, &ex) > 0)) {
if (!(hdesc->state & HMODE_VERBOSE)) printf("%c <%s>\n", (ex.nk->len_classnam)?'*':' ',ex.name);
else printf("[%6x] %c <%s>\n", ex.nkoffs, (ex.nk->len_classnam)?'*':' ',ex.name);
FREE(ex.name);
}
}
count = 0;
if (key->no_values) {
printf(" size type value name [value if type DWORD]\n");
while ((ex_next_v(hdesc, nkofs, &count, &vex) > 0)) {
if (hdesc->state & HMODE_VERBOSE) printf("[%6x] %6d %-16s <%s>", vex.vkoffs, vex.size,
(vex.type < REG_MAX ? val_types[vex.type] : "(unknown)"), vex.name);
else
printf("%6d %-16s <%s>", vex.size,
(vex.type < REG_MAX ? val_types[vex.type] : "(unknown)"), vex.name);
if (vex.type == REG_DWORD) printf(" %*d [0x%x]",25-(int)strlen(vex.name),vex.val , vex.val);
printf("\n");
FREE(vex.name);
}
}
}
/* Get the type of a value */
int get_val_type(struct hive *hdesc, int vofs, char *path, int exact)
{
struct vk_key *vkkey;
int vkofs;
vkofs = trav_path(hdesc, vofs,path,exact | TPF_VK);
if (!vkofs) {
return -1;
}
vkofs +=4;
vkkey = (struct vk_key *)(hdesc->buffer + vkofs);
#if 0
if (vkkey->len_data & 0x80000000) return(REG_DWORD); /* Special case of INLINE storage */
#endif
return(vkkey->val_type);
}
/* Get len of a value, given current key + path */
int get_val_len(struct hive *hdesc, int vofs, char *path, int exact)
{
struct vk_key *vkkey;
int vkofs;
int len;
vkofs = trav_path(hdesc, vofs,path,exact | TPF_VK);
if (!vkofs) {
return -1;
}
vkofs +=4;
vkkey = (struct vk_key *)(hdesc->buffer + vkofs);
len = vkkey->len_data & 0x7fffffff;
if ( vkkey->len_data == 0x80000000 ) { /* Special inline case, return size of 4 (dword) */
len = 4;
}
return(len);
}
/* Get void-pointer to value-data, also if inline.
* If val_type != 0 a check for correct value type is done
* Caller must keep track of value's length (call function above to get it)
*/
void *get_val_data(struct hive *hdesc, int vofs, char *path, int val_type, int exact)
{
struct vk_key *vkkey;
int vkofs;
vkofs = trav_path(hdesc,vofs,path,exact | TPF_VK);
if (!vkofs) {
return NULL;
}
vkofs +=4;
vkkey = (struct vk_key *)(hdesc->buffer + vkofs);
if (vkkey->len_data == 0) return NULL;
if (vkkey->len_data == 0x80000000) { /* Special inline case (len = 0x80000000) */
return(&vkkey->val_type); /* Data (4 bytes?) in type field */
}
if (val_type && vkkey->val_type && (vkkey->val_type) != val_type) {
printf("Value <%s> is not of correct type!\n",path);
#if DOCORE
abort();
#endif
return NULL;
}
/* Negative len is inline, return ptr to offset-field which in
* this case contains the data itself
*/
if (vkkey->len_data & 0x80000000) return(&vkkey->ofs_data);
/* Normal return, return data pointer */
return(hdesc->buffer + vkkey->ofs_data + 0x1004);
}
/* Get and copy key data (if any) to buffer
* if kv==NULL will allocate needed return struct & buffer
* else will use buffer allocated for it (if it fits)
* return len+data or NULL if not found (or other error)
* NOTE: caller must deallocate buffer! a simple free(keyval) will suffice.
*/
struct keyval *get_val2buf(struct hive *hdesc, struct keyval *kv,
int vofs, char *path, int type, int exact )
{
int l;
struct keyval *kr;
void *keydataptr;
l = get_val_len(hdesc, vofs, path, exact);
if (l == -1) return(NULL); /* error */
if (kv && (kv->len < l)) return(NULL); /* Check for overflow of supplied buffer */
keydataptr = get_val_data(hdesc, vofs, path, type, exact);
/* if (!keydataptr) return(NULL); error */
/* Allocate space for data + header, or use supplied buffer */
if (kv) {
kr = kv;
} else {
ALLOC(kr,1,l+sizeof(int)+4);
}
kr->len = l;
memcpy(&(kr->data), keydataptr, l);
return(kr);
}
/* DWORDs are so common that I make a small function to get it easily */
int get_dword(struct hive *hdesc, int vofs, char *path, int exact)
{
struct keyval *v;
int dword;
v = get_val2buf(hdesc, NULL, vofs, path, REG_DWORD, exact | TPF_VK);
if (!v) return(-1); /* well... -1 COULD BE THE STORED VALUE TOO */
dword = (int)v->data;
FREE(v);
return(dword);
}
/* Sanity checker when transferring data into a block
* ofs = offset to data block, point to start of actual datablock linkage
* data = data to copy
* size = size of data to copy
*/
int fill_block(struct hive *hdesc, int ofs, void *data, int size)
{
int blksize;
blksize = get_int(hdesc->buffer + ofs);
blksize = -blksize;
#if 0
printf("fill_block: ofs = %x - %x, size = %x, blksize = %x\n",ofs,ofs+size,size,blksize);
#endif
/* if (blksize < size || ( (ofs & 0xfffff000) != ((ofs+size) & 0xfffff000) )) { */
if (blksize < size) {
printf("fill_block: ERROR: block to small for data: ofs = %x, size = %x, blksize = %x\n",ofs,size,blksize);
debugit(hdesc->buffer,hdesc->size);
abort();
}
memcpy(hdesc->buffer + ofs + 4, data, size);
return(0);
}
/* Free actual data of a value, and update value descriptor
* hdesc - hive
* vofs - current key
* path - path to value
* we return offset of vk
*/
int free_val_data(struct hive *hdesc, int vofs, char *path, int exact)
{
struct vk_key *vkkey;
int vkofs, inl;
vkofs = trav_path(hdesc,vofs,path,1);
if (!vkofs) {
return 0;
}
vkofs +=4;
vkkey = (struct vk_key *)(hdesc->buffer + vkofs);
inl = (vkkey->len_data & 0x80000000);
if (!inl) {
free_block(hdesc, vkkey->ofs_data + 0x1000);
}
vkkey->len_data = 0;
vkkey->ofs_data = 0;
return(vkofs);
}
/* Allocate data for value, realloc if it already contains stuff
* hdesc - hive
* vofs - current key
* path - path to value
* size - size of data
* Returns: 0 - error, >0 pointer to actual dataspace
*/
int alloc_val_data(struct hive *hdesc, int vofs, char *path, int size,int exact)
{
struct vk_key *vkkey;
int vkofs, len;
int datablk;
vkofs = trav_path(hdesc,vofs,path,1);
if (!vkofs) {
return (0);
}
vkofs +=4;
vkkey = (struct vk_key *)(hdesc->buffer + vkofs);
/* Allocate space for new data */
datablk = alloc_block(hdesc, vkofs, size);
if (!datablk) return(0);
len = vkkey->len_data & 0x7fffffff;
/* Then we dealloc if something was there before */
if (len) free_val_data(hdesc,vofs,path,exact);
/* Link in new datablock */
vkkey->ofs_data = datablk - 0x1000;
vkkey->len_data = size;
return(datablk + 4);
}
/* Add a value to a key.
* Just add the metadata (empty value), to put data into it, use
* put_buf2val afterwards
* hdesc - hive
* nkofs - current key
* name - name of value
* type - type of value
* returns: 0 err, >0 offset to value metadata
*/
struct vk_key *add_value(struct hive *hdesc, int nkofs, char *name, int type)
{
struct nk_key *nk;
int oldvlist = 0, newvlist, newvkofs;
struct vk_key *newvkkey;
char *blank="";
if (!name || !*name) return(NULL);
nk = (struct nk_key *)(hdesc->buffer + nkofs);
if (nk->id != 0x6b6e) {
printf("add_value: Key pointer not to 'nk' node!\n");
return(NULL);
}
if (trav_path(hdesc, nkofs, name, 1)) {
printf("add_value: value %s already exists\n",name);
return(NULL);
}
if (!strcmp(name,"@")) name = blank;
if (nk->no_values) oldvlist = nk->ofs_vallist;
newvlist = alloc_block(hdesc, nkofs, nk->no_values * 4 + 4);
if (!newvlist) {
printf("add_value: failed to allocate new value list!\n");
return(NULL);
}
if (oldvlist) { /* Copy old data if any */
memcpy(hdesc->buffer + newvlist + 4, hdesc->buffer + oldvlist + 0x1004, nk->no_values * 4 + 4);
}
/* Allocate value descriptor including its name */
newvkofs = alloc_block(hdesc, newvlist, sizeof(struct vk_key) + strlen(name));
if (!newvkofs) {
printf("add_value: failed to allocate value descriptor\n");
free_block(hdesc, newvlist);
return(NULL);
}
/* Success, now fill in the metadata */
newvkkey = (struct vk_key *)(hdesc->buffer + newvkofs + 4);
/* Add pointer in value list */
*(int *)(hdesc->buffer + newvlist + 4 + (nk->no_values * 4)) = newvkofs - 0x1000;
/* Fill in vk struct */
newvkkey->id = 0x6b76;
newvkkey->len_name = strlen(name);
if (type == REG_DWORD || type == REG_DWORD_BIG_ENDIAN) {
newvkkey->len_data = 0x80000004; /* Prime the DWORD inline stuff */
} else {
newvkkey->len_data = 0x00000000;
}
newvkkey->ofs_data = 0;
newvkkey->val_type = type;
newvkkey->flag = 1; /* Don't really know what this is */
newvkkey->dummy1 = 0;
strcpy((char *)&newvkkey->keyname, name); /* And copy name */
/* Finally update the key and free the old valuelist */
nk->no_values++;
nk->ofs_vallist = newvlist - 0x1000;
if (oldvlist) free_block(hdesc,oldvlist + 0x1000);
return(newvkkey);
}
/* Remove a vk-struct incl dataspace if any
* Mostly for use by higher level stuff
* hdesc - hive
* vkofs - offset to vk
*/
void del_vk(struct hive *hdesc, int vkofs)
{
struct vk_key *vk;
vk = (struct vk_key *)(hdesc->buffer + vkofs);
if (vk->id != 0x6b76) {
printf("del_vk: Key pointer not to 'vk' node!\n");
return;
}
if ( !(vk->len_data & 0x80000000) && vk->ofs_data) {
free_block(hdesc, vk->ofs_data + 0x1000);
}
free_block(hdesc, vkofs - 4);
}
/* Delete all values from key (used in recursive delete)
* hdesc - yer usual hive
* nkofs - current keyoffset
*/
void del_allvalues(struct hive *hdesc, int nkofs)
{
int vlistofs, o, vkofs;
int32_t *vlistkey;
struct nk_key *nk;
nk = (struct nk_key *)(hdesc->buffer + nkofs);
if (nk->id != 0x6b6e) {
printf("del_allvalues: Key pointer not to 'nk' node!\n");
return;
}
if (!nk->no_values) {
/* printf("del_avalues: Key has no values!\n"); */
return;
}
vlistofs = nk->ofs_vallist + 0x1004;
vlistkey = (int32_t *)(hdesc->buffer + vlistofs);
/* Loop through index and delete all vk's */
for (o = 0; o < nk->no_values; o++) {
vkofs = vlistkey[o] + 0x1004;
del_vk(hdesc, vkofs);
}
/* Then zap the index, and update nk */
free_block(hdesc, vlistofs-4);
nk->ofs_vallist = -1;
nk->no_values = 0;
}
/* Delete single value from key
* hdesc - yer usual hive
* nkofs - current keyoffset
* name - name of value to delete
* exact - NKF_EXACT to do exact match, else first match
* returns: 0 - ok, 1 - failed
*/
int del_value(struct hive *hdesc, int nkofs, char *name, int exact)
{
int vlistofs, slot, o, n, vkofs, newlistofs;
int32_t *vlistkey, *tmplist, *newlistkey;
struct nk_key *nk;
char *blank="";
if (!name || !*name) return(1);
if (!strcmp(name,"@")) name = blank;
nk = (struct nk_key *)(hdesc->buffer + nkofs);
if (nk->id != 0x6b6e) {
printf("del_value: Key pointer not to 'nk' node!\n");
return(1);
}
if (!nk->no_values) {
printf("del_value: Key has no values!\n");
return(1);
}
vlistofs = nk->ofs_vallist + 0x1004;
vlistkey = (int32_t *)(hdesc->buffer + vlistofs);
slot = vlist_find(hdesc, vlistofs, nk->no_values, name, TPF_VK);
if (slot == -1) {
printf("del_value: value %s not found!\n",name);
return(1);
}
/* Delete vk and data */
vkofs = vlistkey[slot] + 0x1004;
del_vk(hdesc, vkofs);
/* Copy out old index list */
CREATE(tmplist,int32_t,nk->no_values);
memcpy(tmplist, vlistkey, nk->no_values * sizeof(int32_t));
free_block(hdesc,vlistofs-4); /* Get rid of old list */
nk->no_values--;
if (nk->no_values) {
newlistofs = alloc_block(hdesc, vlistofs, nk->no_values * sizeof(int32_t));
if (!newlistofs) {
printf("del_value: FATAL: Was not able to alloc new index list\n");
abort();
}
/* Now copy over, omitting deleted entry */
newlistkey = (int32_t *)(hdesc->buffer + newlistofs + 4);
for (n = 0, o = 0; o < nk->no_values+1; o++, n++) {
if (o == slot) o++;
newlistkey[n] = tmplist[o];
}
nk->ofs_vallist = newlistofs - 0x1000;
} else {
nk->ofs_vallist = -1;
}
return(0);
}
/* Add a subkey to a key
* hdesc - usual..
* nkofs - offset of current nk
* name - name of key to add
* return: ptr to new keystruct, or NULL
*/
#define AKDEBUG 1
struct nk_key *add_key(struct hive *hdesc, int nkofs, char *name)
{
int slot, newlfofs = 0, oldlfofs = 0, newliofs = 0;
int oldliofs = 0;
int o, n, i, onkofs, newnkofs, cmp;
int rimax, rislot, riofs, namlen;
struct ri_key *ri = NULL;
struct lf_key *newlf = NULL, *oldlf;
struct li_key *newli = NULL, *oldli;
struct nk_key *key, *newnk, *onk;
int32_t hash;
key = (struct nk_key *)(hdesc->buffer + nkofs);
if (key->id != 0x6b6e) {
printf("add_key: current ptr not 'nk'\n");
return(NULL);
}
namlen = strlen(name);
slot = -1;
if (key->no_subkeys) { /* It already has subkeys */
oldlfofs = key->ofs_lf;
oldliofs = key->ofs_lf;
oldlf = (struct lf_key *)(hdesc->buffer + oldlfofs + 0x1004);
if (oldlf->id != 0x666c && oldlf->id != 0x686c && oldlf->id != 0x696c && oldlf->id != 0x6972) {
printf("add_key: index type not supported: 0x%04x\n",oldlf->id);
return(NULL);
}
rimax = 0; ri = NULL; riofs = 0; rislot = -1;
if (oldlf->id == 0x6972) { /* Indirect index 'ri', init loop */
riofs = key->ofs_lf;
ri = (struct ri_key *)(hdesc->buffer + riofs + 0x1004);
rimax = ri->no_lis-1;
#ifdef AKDEBUG
printf("add_key: entering 'ri' traverse, rimax = %d\n",rimax);
#endif
oldliofs = ri->hash[rislot+1].ofs_li;
oldlfofs = ri->hash[rislot+1].ofs_li;
}
do { /* 'ri' loop, at least run once if no 'ri' deep index */
if (ri) { /* Do next 'ri' slot */
rislot++;
oldliofs = ri->hash[rislot].ofs_li;
oldlfofs = ri->hash[rislot].ofs_li;
oldli = (struct li_key *)(hdesc->buffer + oldliofs + 0x1004);
oldlf = (struct lf_key *)(hdesc->buffer + oldlfofs + 0x1004);
}
oldli = (struct li_key *)(hdesc->buffer + oldliofs + 0x1004);
oldlf = (struct lf_key *)(hdesc->buffer + oldlfofs + 0x1004);
#ifdef AKDEBUG
printf("add_key: top of ri-loop: rislot = %d, rimax = %d\n",rislot,rimax);
#endif
slot = -1;
if (oldli->id == 0x696c) { /* li */
#ifdef AKDEBUG
printf("add_key: li slot allocate\n");
#endif
FREE(newli);
ALLOC(newli, 8 + 4*oldli->no_keys + 4, 1);
newli->no_keys = oldli->no_keys;
newli->id = oldli->id;
/* Now copy old, checking where to insert (alphabetically) */
for (o = 0, n = 0; o < oldli->no_keys; o++,n++) {
onkofs = oldli->hash[o].ofs_nk;
onk = (struct nk_key *)(onkofs + hdesc->buffer + 0x1004);
if (slot == -1) {
#if 1
printf("add_key: cmp <%s> with <%s>\n",name,onk->keyname);
#endif
cmp = strncasecmp(name, onk->keyname, (namlen > onk->len_name) ? namlen : onk->len_name);
if (!cmp) {
printf("add_key: key %s already exists!\n",name);
FREE(newli);
return(NULL);
}
if ( cmp < 0) {
slot = o;
rimax = rislot; /* Cause end of 'ri' search, too */
n++;
#ifdef AKDEBUG
printf("add_key: li-match: slot = %d\n",o);
#endif
}
}
newli->hash[n].ofs_nk = oldli->hash[o].ofs_nk;
}
if (slot == -1) slot = oldli->no_keys;
} else { /* lf or lh */
oldlf = (struct lf_key *)(hdesc->buffer + oldlfofs + 0x1004);
FREE(newlf);
ALLOC(newlf, 8 + 8*oldlf->no_keys + 8, 1);
newlf->no_keys = oldlf->no_keys;
newlf->id = oldlf->id;
#ifdef AKDEBUG
printf("add_key: new lf/lh no_keys: %d\n",newlf->no_keys);
#endif
/* Now copy old, checking where to insert (alphabetically) */
for (o = 0, n = 0; o < oldlf->no_keys; o++,n++) {
onkofs = oldlf->hash[o].ofs_nk;
onk = (struct nk_key *)(onkofs + hdesc->buffer + 0x1004);
if (slot == -1) {
#if 0
printf("add_key: cmp <%s> with <%s>\n",name,onk->keyname);
#endif
cmp = strncasecmp(name, onk->keyname, (namlen > onk->len_name) ? namlen : onk->len_name);
if (!cmp) {
printf("add_key: key %s already exists!\n",name);
FREE(newlf);
return(NULL);
}
if ( cmp < 0 ) {
slot = o;
rimax = rislot; /* Cause end of 'ri' search, too */
n++;
#ifdef AKDEBUG
printf("add_key: lf-match: slot = %d\n",o);
#endif
}
}
newlf->hash[n].ofs_nk = oldlf->hash[o].ofs_nk;
newlf->hash[n].name[0] = oldlf->hash[o].name[0];
newlf->hash[n].name[1] = oldlf->hash[o].name[1];
newlf->hash[n].name[2] = oldlf->hash[o].name[2];
newlf->hash[n].name[3] = oldlf->hash[o].name[3];
}
if (slot == -1) slot = oldlf->no_keys;
} /* li else check */
} while ( (rislot < rimax) && (rimax > 0)); /* 'ri' wrapper loop */
} else { /* Parent was empty, make new index block */
#ifdef AKDEBUG
printf("add_key: new index!\n");
#endif
ALLOC(newlf, 8 + 8, 1);
newlf->no_keys = 1;
/* Use ID (lf, lh or li) we fetched from root node, so we use same as rest of hive */
newlf->id = hdesc->nkindextype;
slot = 0;
} /* if has keys before */
/* Make and fill in new nk */
newnkofs = alloc_block(hdesc, nkofs, sizeof(struct nk_key) + strlen(name));
if (!newnkofs) {
printf("add_key: unable to allocate space for new key descriptor for %s!\n",name);
FREE(newlf);
FREE(newli);
return(NULL);
}
newnk = (struct nk_key *)(hdesc->buffer + newnkofs + 4);
newnk->id = 0x6b6e;
newnk->type = KEY_NORMAL;
newnk->ofs_parent = nkofs - 0x1004;
newnk->no_subkeys = 0;
newnk->ofs_lf = 0;
newnk->no_values = 0;
newnk->ofs_vallist = -1;
newnk->ofs_sk = key->ofs_sk; /* Get parents for now. 0 or -1 here crashes XP */
newnk->ofs_classnam = -1;
newnk->len_name = strlen(name);
newnk->len_classnam = 0;
strcpy(newnk->keyname, name);
if (newli) { /* Handle li */
#if AKDEBUG
printf("add_key: li fill at slot: %d\n",slot);
#endif
/* And put its offset into parents index list */
newli->hash[slot].ofs_nk = newnkofs - 0x1000;
newli->no_keys++;
/* Allocate space for our new li list and copy it into reg */
newliofs = alloc_block(hdesc, nkofs, 8 + 4*newli->no_keys);
if (!newliofs) {
printf("add_key: unable to allocate space for new index table for %s!\n",name);
FREE(newli);
free_block(hdesc,newnkofs);
return(NULL);
}
/* memcpy(hdesc->buffer + newliofs + 4, newli, 8 + 4*newli->no_keys); */
fill_block(hdesc, newliofs, newli, 8 + 4*newli->no_keys);
} else { /* lh or lf */
#ifdef AKDEBUG
printf("add_key: lf/lh fill at slot: %d, rislot: %d\n",slot,rislot);
#endif
/* And put its offset into parents index list */
newlf->hash[slot].ofs_nk = newnkofs - 0x1000;
newlf->no_keys++;
if (newlf->id == 0x666c) { /* lf hash */
newlf->hash[slot].name[0] = 0;
newlf->hash[slot].name[1] = 0;
newlf->hash[slot].name[2] = 0;
newlf->hash[slot].name[3] = 0;
strncpy(newlf->hash[slot].name, name, 4);
} else if (newlf->id == 0x686c) { /* lh. XP uses this. hashes whole name */
for (i = 0,hash = 0; i < strlen(name); i++) {
hash *= 37;
hash += toupper(name[i]);
}
newlf->lh_hash[slot].hash = hash;
}
/* Allocate space for our new lf list and copy it into reg */
newlfofs = alloc_block(hdesc, nkofs, 8 + 8*newlf->no_keys);
if (!newlfofs) {
printf("add_key: unable to allocate space for new index table for %s!\n",name);
FREE(newlf);
free_block(hdesc,newnkofs);
return(NULL);
}
/* memcpy(hdesc->buffer + newlfofs + 4, newlf, 8 + 8*newlf->no_keys); */
fill_block(hdesc, newlfofs, newlf, 8 + 8*newlf->no_keys);
} /* li else */
/* Update parent, and free old lf list */
key->no_subkeys++;
if (ri) { /* ri index */
ri->hash[rislot].ofs_li = (newlf ? newlfofs : newliofs) - 0x1000;
} else { /* Parent key */
key->ofs_lf = (newlf ? newlfofs : newliofs) - 0x1000;
}
if (newlf && oldlfofs) free_block(hdesc,oldlfofs + 0x1000);
if (newli && oldliofs) free_block(hdesc,oldliofs + 0x1000);
FREE(newlf);
FREE(newli);
return(newnk);
}
/* Delete a subkey from a key
* hdesc - usual..
* nkofs - offset of current nk
* name - name of key to delete (must match exactly, also case)
* return: 1 - err, 0 - ok
*/
#undef DKDEBUG
int del_key(struct hive *hdesc, int nkofs, char *name)
{
int slot = 0, newlfofs = 0, oldlfofs = 0, o, n, onkofs, delnkofs;
int oldliofs = 0, no_keys = 0, newriofs = 0;
int namlen;
int rimax, riofs, rislot;
struct ri_key *ri, *newri = NULL;
struct lf_key *newlf = NULL, *oldlf = NULL;
struct li_key *newli = NULL, *oldli = NULL;
struct nk_key *key, *onk, *delnk;
char fullpath[501];
key = (struct nk_key *)(hdesc->buffer + nkofs);
namlen = strlen(name);
if (key->id != 0x6b6e) {
printf("add_key: current ptr not nk\n");
return(1);
}
slot = -1;
if (!key->no_subkeys) {
printf("del_key: key has no subkeys!\n");
return(1);
}
oldlfofs = key->ofs_lf;
oldliofs = key->ofs_lf;
oldlf = (struct lf_key *)(hdesc->buffer + oldlfofs + 0x1004);
if (oldlf->id != 0x666c && oldlf->id != 0x686c && oldlf->id != 0x696c && oldlf->id != 0x6972) {
printf("del_key: index other than 'lf', 'li' or 'lh' not supported yet. 0x%04x\n",oldlf->id);
return(1);
}
rimax = 0; ri = NULL; riofs = 0;
rislot = 0;
if (oldlf->id == 0x6972) { /* Indirect index 'ri', init loop */
riofs = key->ofs_lf;
ri = (struct ri_key *)(hdesc->buffer + riofs + 0x1004);
rimax = ri->no_lis-1;
#ifdef DKDEBUG
printf("del_key: entering 'ri' traverse, rimax = %d\n",rimax);
#endif
rislot = -1; /* Starts at slot 0 below */
}
do { /* 'ri' loop, at least run once if no 'ri' deep index */
if (ri) { /* Do next 'ri' slot */
rislot++;
oldliofs = ri->hash[rislot].ofs_li;
oldlfofs = ri->hash[rislot].ofs_li;
}
oldli = (struct li_key *)(hdesc->buffer + oldliofs + 0x1004);
oldlf = (struct lf_key *)(hdesc->buffer + oldlfofs + 0x1004);
#ifdef DKDEBUG
printf("del_key: top of ri-loop: rislot = %d\n",rislot);
#endif
slot = -1;
if (oldlf->id == 0x696c) { /* 'li' handler */
#ifdef DKDEBUG
printf("del_key: li handler\n");
#endif
FREE(newli);
ALLOC(newli, 8 + 4*oldli->no_keys - 4, 1);
newli->no_keys = oldli->no_keys - 1; no_keys = newli->no_keys;
newli->id = oldli->id;
/* Now copy old, checking where to delete */
for (o = 0, n = 0; o < oldli->no_keys; o++,n++) {
onkofs = oldli->hash[o].ofs_nk;
onk = (struct nk_key *)(onkofs + hdesc->buffer + 0x1004);
if (slot == -1 && onk->len_name == namlen && !strncmp(name, onk->keyname, (onk->len_name > namlen) ? onk->len_name : namlen)) {
slot = o;
delnkofs = onkofs; delnk = onk;
rimax = rislot;
o++;
}
newli->hash[n].ofs_nk = oldli->hash[o].ofs_nk;
}
} else { /* 'lf' or 'lh' are similar */
#ifdef DKDEBUG
printf("del_key: lf or lh handler\n");
#endif
FREE(newlf);
ALLOC(newlf, 8 + 8*oldlf->no_keys - 8, 1);
newlf->no_keys = oldlf->no_keys - 1; no_keys = newlf->no_keys;
newlf->id = oldlf->id;
/* Now copy old, checking where to delete */
for (o = 0, n = 0; o < oldlf->no_keys; o++,n++) {
onkofs = oldlf->hash[o].ofs_nk;
onk = (struct nk_key *)(onkofs + hdesc->buffer + 0x1004);
if (slot == -1 && (onk->len_name == namlen) && !strncmp(name, onk->keyname, onk->len_name)) {
slot = o;
delnkofs = onkofs; delnk = onk;
rimax = rislot;
o++;
}
newlf->hash[n].ofs_nk = oldlf->hash[o].ofs_nk;
newlf->hash[n].name[0] = oldlf->hash[o].name[0];
newlf->hash[n].name[1] = oldlf->hash[o].name[1];
newlf->hash[n].name[2] = oldlf->hash[o].name[2];
newlf->hash[n].name[3] = oldlf->hash[o].name[3];
}
} /* else lh or lf */
} while (rislot < rimax); /* ri traverse loop */
if (slot == -1) {
printf("del_key: subkey %s not found!\n",name);
FREE(newlf);
FREE(newli);
return(1);
}
#ifdef DKDEBUG
printf("del_key: key found at slot %d\n",slot);
#endif
if (delnk->no_values || delnk->no_subkeys) {
printf("del_key: subkey %s has subkeys or values. Not deleted.\n",name);
FREE(newlf);
FREE(newli);
return(1);
}
/* Allocate space for our new lf list and copy it into reg */
if ( no_keys && (newlf || newli) ) {
newlfofs = alloc_block(hdesc, nkofs, 8 + (newlf ? 8 : 4) * no_keys);
#ifdef DKDEBUG
printf("del_key: alloc_block for index returns: %x\n",newlfofs);
#endif
if (!newlfofs) {
printf("del_key: WARNING: unable to allocate space for new key descriptor for %s! Not deleted\n",name);
FREE(newlf);
return(1);
}
/* memcpy(hdesc->buffer + newlfofs + 4,
((void *)newlf ? (void *)newlf : (void *)newli), 8 + (newlf ? 8 : 4) * no_keys);
*/
fill_block(hdesc, newlfofs,
((void *)newlf ? (void *)newlf : (void *)newli), 8 + (newlf ? 8 : 4) * no_keys);
} else { /* Last deleted, will throw away index */
newlfofs = 0xfff; /* We subtract 0x1000 later */
}
if (newlfofs < 0xfff) {
printf("del_key: ERROR: newlfofs = %x\n",newlfofs);
#if DOCORE
debugit(hdesc->buffer,hdesc->size);
abort();
#endif
}
/* Check for CLASS data, if so, deallocate it too */
if (delnk->len_classnam) {
free_block(hdesc, delnk->ofs_classnam + 0x1000);
}
/* Now it's safe to zap the nk */
free_block(hdesc, delnkofs + 0x1000);
/* And the old index list */
free_block(hdesc, (oldlfofs ? oldlfofs : oldliofs) + 0x1000);
/* Update parent */
key->no_subkeys--;
if (ri) {
if (newlfofs == 0xfff) {
*fullpath = 0;
get_abs_path(hdesc, nkofs, fullpath, 480);
VERBF(hdesc,"del_key: need to delete ri-slot %d for %x - %s\n", rislot,nkofs,fullpath );
if (ri->no_lis > 1) { /* We have subindiceblocks left? */
/* Delete from array */
ALLOC(newri, 8 + 4*ri->no_lis - 4, 1);
newri->no_lis = ri->no_lis - 1;
newri->id = ri->id;
for (o = 0, n = 0; o < ri->no_lis; o++,n++) {
if (n == rislot) o++;
newri->hash[n].ofs_li = ri->hash[o].ofs_li;
}
newriofs = alloc_block(hdesc, nkofs, 8 + newri->no_lis*4 );
if (!newriofs) {
printf("del_key: WARNING: unable to allocate space for ri-index for %s! Not deleted\n",name);
FREE(newlf);
FREE(newri);
return(1);
}
fill_block(hdesc, newriofs, newri, 8 + newri->no_lis * 4);
free_block(hdesc, riofs + 0x1000);
key->ofs_lf = newriofs - 0x1000;
FREE(newri);
} else { /* Last entry in ri was deleted, get rid of it, key is empty */
VERB(hdesc,"del_key: .. and that was the last one. key now empty!\n");
free_block(hdesc, riofs + 0x1000);
key->ofs_lf = -1;
}
} else {
ri->hash[rislot].ofs_li = newlfofs - 0x1000;
}
} else {
key->ofs_lf = newlfofs - 0x1000;
}
FREE(newlf);
return(0);
}
/* Recursive delete keys
* hdesc - usual..
* nkofs - offset of current nk
* name - name of key to delete
* return: 0 - ok, 1 fail
*/
void rdel_keys(struct hive *hdesc, char *path, int vofs)
{
struct nk_key *key;
int nkofs;
struct ex_data ex;
int count = 0, countri = 0;
if (!path || !*path) return;
nkofs = trav_path(hdesc, vofs, path, TPF_NK_EXACT);
if(!nkofs) {
printf("rdel_keys: Key <%s> not found\n",path);
return;
}
nkofs += 4;
key = (struct nk_key *)(hdesc->buffer + nkofs);
/*
VERBF(hdesc,"rdel of node at offset 0x%0x\n",nkofs);
*/
if (key->id != 0x6b6e) {
printf("Error: Not a 'nk' node!\n");
debugit(hdesc->buffer,hdesc->size);
}
#if 0
printf("Node has %d subkeys and %d values\n",key->no_subkeys,key->no_values);
#endif
if (key->no_subkeys) {
while ((ex_next_n(hdesc, nkofs, &count, &countri, &ex) > 0)) {
#if 0
printf("%s\n",ex.name);
#endif
rdel_keys(hdesc, ex.name, nkofs);
count = 0;
countri = 0;
FREE(ex.name);
}
}
del_allvalues(hdesc, nkofs);
del_key(hdesc, key->ofs_parent+0x1004, path);
}
/* Get and copy keys CLASS-data (if any) to buffer
* Returns a buffer with the data (first int32_t is size). see ntreg.h
* NOTE: caller must deallocate buffer! a simple free(keyval) will suffice.
*/
struct keyval *get_class(struct hive *hdesc,
int curnk, char *path)
{
int clen = 0, dofs = 0, nkofs;
struct nk_key *key;
struct keyval *data;
void *classdata;
if (!path && !curnk) return(NULL);
nkofs = trav_path(hdesc, curnk, path, 0);
if(!nkofs) {
printf("get_class: Key <%s> not found\n",path);
return(NULL);
}
nkofs += 4;
key = (struct nk_key *)(hdesc->buffer + nkofs);
clen = key->len_classnam;
if (!clen) {
printf("get_class: Key has no class data.\n");
return(NULL);
}
dofs = key->ofs_classnam;
classdata = (void *)(hdesc->buffer + dofs + 0x1004);
#if 0
printf("get_class: len_classnam = %d\n",clen);
printf("get_class: ofs_classnam = 0x%x\n",dofs);
#endif
ALLOC(data, sizeof(struct keyval) + clen,1);
data->len = clen;
memcpy(&data->data, classdata, clen);
return(data);
}
/* Write to registry value.
* If same size as existing, copy back in place to avoid changing too much
* otherwise allocate new dataspace, then free the old
* Thus enough space to hold both new and old data is needed
* Pass inn buffer with data len as first DWORD (as routines above)
* returns: 0 - error, len - OK (len of data)
*/
int put_buf2val(struct hive *hdesc, struct keyval *kv,
int vofs, char *path, int type, int exact )
{
int l;
void *keydataptr;
if (!kv) return(0);
l = get_val_len(hdesc, vofs, path, exact);
if (l == -1) return(0); /* error */
if (kv->len != l) { /* Realloc data block if not same size as existing */
if (!alloc_val_data(hdesc, vofs, path, kv->len, exact)) {
printf("put_buf2val: %s : alloc_val_data failed!\n",path);
return(0);
}
}
keydataptr = get_val_data(hdesc, vofs, path, type, exact);
if (!keydataptr) return(0); /* error */
memcpy(keydataptr, &kv->data, kv->len);
hdesc->state |= HMODE_DIRTY;
return(kv->len);
}
/* And, yer basic DWORD write */
int put_dword(struct hive *hdesc, int vofs, char *path, int exact, int dword)
{
struct keyval *kr;
int r;
ALLOC(kr,1,sizeof(int)+sizeof(int));
kr->len = sizeof(int);
kr->data = dword;
r = put_buf2val(hdesc, kr, vofs, path, REG_DWORD, exact);
FREE(kr);
return(r);
}
/* ================================================================ */
/* Code to export registry entries to .reg file initiated by
* Leo von Klenze
* Then expanded a bit to handle more types etc.
*/
/*
* converts a value string from an registry entry into a c string. It does not
* use any encoding functions.
* It works very primitive by just taking every second char.
* The caller must free the resulting string, that was allocated with malloc.
*
* string: string where every second char is \0
* len: length of the string
* return: the converted string as char*
*/
static char *
string_regw2prog(void *string, int len)
{
int i, k;
char *cstring;
int out_len = 0;
for(i = 0; i < len; i += 2)
{
unsigned v = ((unsigned char *)string)[i] + ((unsigned char *)string)[i+1] * 256u;
if (v < 128)
out_len += 1;
else if(v < 0x800)
out_len += 2;
else
out_len += 3;
}
cstring = (char *) malloc(out_len+1);
if (!cstring) {
printf("FATAL! ex_next: malloc() failed! Out of memory?\n");
abort();
}
for(i = 0, k = 0; i < len; i += 2)
{
unsigned v = ((unsigned char *)string)[i] + ((unsigned char *)string)[i+1] * 256u;
if (v < 128)
cstring[k++] = v;
else if(v < 0x800) {
cstring[k++] = 0xc0 | (v >> 6);
cstring[k++] = 0x80 | (v & 0x3f);
} else {
cstring[k++] = 0xe0 | (v >> 12);
cstring[k++] = 0x80 | ((v >> 6) & 0x3f);
cstring[k++] = 0x80 | (v & 0x3f);
}
}
cstring[out_len] = '\0';
return cstring;
}
static char *
string_rega2prog(void *string, int len)
{
int i, k;
char *cstring;
int out_len = 0;
for(i = 0; i < len; ++i)
{
unsigned v = ((unsigned char *)string)[i];
if (v < 128)
out_len += 1;
else
out_len += 2;
}
cstring = (char *) malloc(out_len+1);
if (!cstring) {
printf("FATAL! ex_next: malloc() failed! Out of memory?\n");
abort();
}
for(i = 0, k = 0; i < len; ++i)
{
unsigned v = ((unsigned char *)string)[i];
if (v < 128)
cstring[k++] = v;
else {
cstring[k++] = 0xc0 | (v >> 6);
cstring[k++] = 0x80 | (v & 0x3f);
}
}
cstring[out_len] = '\0';
return cstring;
}
static void
string_prog2rega(char *string, int len)
{
char *out = string;
unsigned char *in = (unsigned char*) string;
for (;*in; ++in) {
if (!(*in & 0x80)) {
*out++ = *in;
} else if ((in[0] & 0xe0) == 0xc0 && in[1]) {
*out++ = (in[0] & 0x1f) << 6 | (in[1] & 0x3f);
++in;
} else if (in[1] && in[2]) {
/* assume 3 byte*/
*out++ = (in[1] & 0xf) << 6 | (in[2] & 0x3f);
in += 2;
}
}
*out = 0;
}
static char *
string_prog2regw(void *string, int len, int *out_len)
{
unsigned char *regw = (unsigned char*) malloc(len*2+2);
unsigned char *out = regw;
unsigned char *in = (unsigned char*) string;
for (;len>0; ++in, --len) {
if (!(in[0] & 0x80)) {
*out++ = *in;
*out++ = 0;
} else if ((in[0] & 0xe0) == 0xc0 && len >= 2) {
*out++ = (in[0] & 0x1f) << 6 | (in[1] & 0x3f);
*out++ = (in[0] & 0x1f) >> 2;
++in, --len;
} else if (len >= 3) {
/* assume 3 byte*/
*out++ = (in[1] & 0xf) << 6 | (in[2] & 0x3f);
*out++ = (in[0] & 0xf) << 4 | ((in[1] & 0x3f) >> 2);
in += 2;
len -= 2;
}
}
*out_len = out - regw;
out[0] = out[1] = 0;
return (char *) regw;
}
static char *
quote_string(const char *s)
{
int len = strlen(s);
const char *p;
char *dst, *out;
for (p = s; *p; ++p)
if (*p == '\\' || *p == '\"')
++len;
dst = out = (char*) malloc(len + 1);
for (p = s; *p; ++p) {
if (*p == '\\' || *p == '\"')
*dst++ = '\\';
*dst++ = *p;
}
*dst = 0;
return out;
}
static void
export_bin(int type, char *value, int len, int col, FILE* file)
{
int byte;
if (type == REG_BINARY) {
fprintf(file, "hex:");
col += 4;
} else {
fprintf(file, "hex(%x):", type);
col += 7;
}
byte = 0;
int start = (col - 2) / 3;
while (byte + 1 < len) { /* go byte by byte.. probably slow.. */
fprintf(file, "%02x,", (unsigned char)value[byte]);
byte++;
if (!((byte + start) % 25)) fprintf(file, "\\\r\n ");
}
if (len)
fprintf(file, "%02x\r\n", (unsigned char)value[len - 1]);
}
/*
* Exports the named subkey and its values to the given file.
*
* hdesc: registry hive
* nkofs: offset of parent node
* name: name of key to export
* prefix: prefix for each key. This prefix is prepended to the keyname
* file: file descriptor of destination file
*/
void export_subkey(struct hive *hdesc, int nkofs, char *name, char *prefix, FILE *file)
{
int newofs;
int count = 0;
int countri = 0;
int len;
char *path = (char*) malloc(1024);
char *value;
struct nk_key *key;
struct ex_data ex;
struct vex_data vex;
// switch to key
newofs = trav_path(hdesc, nkofs, name, TPF_NK_EXACT);
if(!newofs)
{
printf("Key '%s' not found!\n", name);
free(path);
return;
}
nkofs = newofs + 4;
// get the key
key = (struct nk_key *)(hdesc->buffer + nkofs);
printf("Exporting key '%.*s' with %d subkeys and %d values...\n",
key->len_name, key->keyname, key->no_subkeys, key->no_values);
*path = 0;
get_abs_path(hdesc, nkofs, path, 1024);
// export the key
fprintf(file, "\r\n");
fprintf(file, "[%s\%s]\r\n", prefix, path);
// export values
if(key->no_values)
{
while ((ex_next_v(hdesc, nkofs, &count, &vex) > 0))
{
int col = 0;
char *name = quote_string(vex.name);
/* print name */
if (!name[0]) {
fprintf(file, "@=");
free(name);
name = str_dup("@");
col += 2;
} else {
fprintf(file, "\"%s\"=", name);
col += strlen(name) + 3;
}
if(vex.type == REG_DWORD)
{
fprintf(file, "dword:%08x\r\n", vex.val);
}
else if(vex.type == REG_SZ)
{
char *val, *quoted;
value = (char *)get_val_data(hdesc, nkofs, name, vex.type, TPF_VK_EXACT);
len = get_val_len(hdesc, nkofs, name, TPF_VK_EXACT);
val = string_regw2prog(value, len);
/* dump as binary if invalid characters are embedded */
if (strchr(val, 0xa) || strchr(val, 0xd))
{
free(val);
//if (len >= 2 && value[len-2] == 0 && value[len-1] == 0) len -= 2;
export_bin(vex.type, value, len, col, file);
}
else
{
quoted = quote_string(val);
free(val);
fprintf(file, "\"%s\"", quoted);
free(quoted);
fprintf(file, "\r\n");
}
}
else
{
/* All other types seems to simply be hexdumped. Format is:
"valuename"=hex(typenum):xx,xx,xx,xx,xx...
for example:
"qword64"=hex(b):4e,03,51,db,fa,04,00,00
this is type = 0xb = 11 = REG_QWORD
"expandstring"=hex(2):46,00,6f,00,6f,00,62,00,61,00,72,00,20,00,25,00,73,00,20,\
00,42,00,61,00,7a,00,00,00
this is type 2 = REG_EXPAND_SZ and the line is continued with ,\<CR><LF><space><space>
don't know how many bytes for each line. Around 18-24 seems to be it?? depends on name lenght??
NOTE: Exception:
type = REG_BINARY starts like this: "valuename"=hex:xx,xx,xx...
*/
value = (char *)get_val_data(hdesc, nkofs, name, vex.type, TPF_VK_EXACT);
len = get_val_len(hdesc, nkofs, name, TPF_VK_EXACT);
export_bin(vex.type, value, len, col, file);
}
FREE(vex.name);
free(name);
}
}
// export subkeys
if (key->no_subkeys)
{
count = 0;
countri = 0;
while ((ex_next_n(hdesc, nkofs, &count, &countri, &ex) > 0))
{
export_subkey(hdesc, nkofs, ex.name, prefix, file);
FREE(ex.name);
}
}
free(path);
}
/*
* Exports the given key to a windows .reg file that can be imported to the
* windows registry.
* The prefix is used to determine the destination hive in the windows
* registry, set it to HKEY_CURRENT_USER or HKEY_LOCAL_MACHINE or whatever you
* want.
*
* hdesc: hive
* nkofs: offset of parent node
* name: name of subkey to export
* filename: name of destination .reg file (will be overridden)
* prefix: prefix for each exported key
*/
void export_key(struct hive *hdesc, int nkofs, char *name, char *filename, char *prefix)
{
FILE *file;
// open file
file = fopen(filename, "w");
if(!file)
{
printf("Cannot open file '%s'. %s (%d).\n", filename, strerror(errno),
errno);
return;
}
printf("Exporting to file '%s'...\n", filename);
fprintf(file, "Windows Registry Editor Version 5.00\r\n");
export_subkey(hdesc, nkofs, name, prefix, file);
fclose(file);
}
/* ================================================================ */
/* Hive control (load/save/close) etc */
void closeHive(struct hive *hdesc)
{
printf("closing hive %s\n",hdesc->filename);
if (hdesc->state & HMODE_OPEN) {
close(hdesc->filedesc);
}
FREE(hdesc->filename);
FREE(hdesc->buffer);
FREE(hdesc);
}
/* Write the hive back to disk (only if dirty & not readonly */
int writeHive(struct hive *hdesc)
{
int len, i;
struct regf_header *hdr;
int32_t checksum;
if (hdesc->state & HMODE_RO) return(0);
if ( !(hdesc->state & HMODE_DIRTY)) return(0);
if ( !(hdesc->state & HMODE_OPEN)) { /* File has been closed */
if (!(hdesc->filedesc = open(hdesc->filename,O_RDWR))) {
fprintf(stderr,"writeHive: open(%s) failed: %s, FILE NOT WRITTEN!\n",hdesc->filename,strerror(errno));
return(1);
}
hdesc->state |= HMODE_OPEN;
}
/* Seek back to begginning of file (in case it's already open) */
lseek(hdesc->filedesc, 0, SEEK_SET);
/* compute new checksum */
hdr = (struct regf_header *) hdesc->buffer;
checksum = 0;
for (i = 0; i < 0x1fc/4; ++i)
checksum ^= ((int32_t *) hdr)[i];
hdr->checksum = checksum;
len = write(hdesc->filedesc, hdesc->buffer, hdesc->size);
if (len != hdesc->size) {
fprintf(stderr,"writeHive: write of %s failed: %s.\n",hdesc->filename,strerror(errno));
return(1);
}
hdesc->state &= (~HMODE_DIRTY);
return(0);
}
struct hive *openHive(char *filename, int mode)
{
struct hive *hdesc;
int fmode,r,vofs;
struct stat sbuf;
uint32_t pofs;
/* off_t l; */
char *c;
struct hbin_page *p;
struct regf_header *hdr;
struct nk_key *nk;
struct ri_key *rikey;
int verbose = (mode & HMODE_VERBOSE);
int trace = (mode & HMODE_TRACE);
CREATE(hdesc,struct hive,1);
hdesc->filename = str_dup(filename);
hdesc->state = 0;
hdesc->size = 0;
hdesc->buffer = NULL;
if ( (mode & HMODE_RO) ) {
fmode = O_RDONLY;
} else {
fmode = O_RDWR;
}
hdesc->filedesc = open(hdesc->filename,fmode);
if (hdesc->filedesc < 0) {
fprintf(stderr,"openHive(%s) failed: %s, trying read-only\n",hdesc->filename,strerror(errno));
fmode = O_RDONLY;
mode |= HMODE_RO;
hdesc->filedesc = open(hdesc->filename,fmode);
if (hdesc->filedesc < 0) {
fprintf(stderr,"openHive(%s) in fallback RO-mode failed: %s\n",hdesc->filename,strerror(errno));
closeHive(hdesc);
return(NULL);
}
}
if ( fstat(hdesc->filedesc,&sbuf) ) {
perror("stat()");
exit(1);
}
hdesc->size = sbuf.st_size;
hdesc->state = mode | HMODE_OPEN;
/* fprintf(stderr,"hiveOpen(%s) successful\n",hdesc->filename); */
/* Read the whole file */
ALLOC(hdesc->buffer,1,hdesc->size);
r = read(hdesc->filedesc,hdesc->buffer,hdesc->size);
if (r < hdesc->size) {
fprintf(stderr,"Could not read file, got %d bytes while expecting %d\n",
r, hdesc->size);
closeHive(hdesc);
return(NULL);
}
/* Now run through file, tallying all pages */
/* NOTE/KLUDGE: Assume first page starts at offset 0x1000 */
pofs = 0x1000;
hdr = (struct regf_header *)hdesc->buffer;
if (hdr->id != 0x66676572) {
printf("openHive(%s): File does not seem to be a registry hive!\n",filename);
return(hdesc);
}
printf("Hive <%s> name (from header): <",filename);
for (c = hdr->name; *c && (c < hdr->name + 64); c += 2) putchar(*c);
hdesc->rootofs = hdr->ofs_rootkey + 0x1000;
printf(">\nROOT KEY at offset: 0x%06x * ",hdesc->rootofs);
/* Cache the roots subkey index type (li,lf,lh) so we can use the correct
* one when creating the first subkey in a key */
nk = (struct nk_key *)(hdesc->buffer + hdesc->rootofs + 4);
if (nk->id == 0x6b6e) {
rikey = (struct ri_key *)(hdesc->buffer + nk->ofs_lf + 0x1004);
hdesc->nkindextype = rikey->id;
if (hdesc->nkindextype == 0x6972) { /* Gee, big root, must check indirectly */
printf("load_hive: DEBUG: BIG ROOT!\n");
rikey = (struct ri_key *)(hdesc->buffer + rikey->hash[0].ofs_li + 0x1004);
hdesc->nkindextype = rikey->id;
}
if (hdesc->nkindextype != 0x666c &&
hdesc->nkindextype != 0x686c &&
hdesc->nkindextype != 0x696c) {
hdesc->nkindextype = 0x666c;
}
printf("Subkey indexing type is: %04x <%c%c>\n",
hdesc->nkindextype,
hdesc->nkindextype & 0xff,
hdesc->nkindextype >> 8);
} else {
printf("load_hive: WARNING: ROOT key does not seem to be a key! (not type == nk)\n");
}
while (pofs < hdesc->size) {
#ifdef LOAD_DEBUG
if (trace) hexdump(hdesc->buffer,pofs,pofs+0x20,1);
#endif
p = (struct hbin_page *)(hdesc->buffer + pofs);
if (p->id != 0x6E696268) {
printf("Page at 0x%x is not 'hbin', assuming file contains garbage at end\n",pofs);
break;
}
hdesc->pages++;
#ifdef LOAD_DEBUG
if (trace) printf("\n###### Page at 0x%0lx has size 0x%0lx, next at 0x%0lx ######\n",pofs,p->len_page,p->ofs_next);
#endif
if (p->ofs_next == 0) {
#ifdef LOAD_DEBUG
if (trace) printf("openhive debug: bailing out.. pagesize zero!\n");
#endif
return(hdesc);
}
#if 0
if (p->len_page != p->ofs_next) {
#ifdef LOAD_DEBUG
if (trace) printf("openhive debug: len & ofs not same. HASTA!\n");
#endif
exit(0);
}
#endif
vofs = pofs + 0x20; /* Skip page header */
#if 1
while (vofs-pofs < p->ofs_next && vofs < hdesc->size) {
vofs += parse_block(hdesc,vofs,trace);
}
#endif
pofs += p->ofs_next;
}
printf("File size %d [%x] bytes, containing %d pages (+ 1 headerpage)\n",hdesc->size,hdesc->size, hdesc->pages);
printf("Used for data: %d/%d blocks/bytes, unused: %d/%d blocks/bytes.\n\n",
hdesc->useblk,hdesc->usetot,hdesc->unuseblk,hdesc->unusetot);
/* So, let's guess what kind of hive this is, based on keys in its root */
hdesc->type = HTYPE_UNKNOWN;
if (trav_path(hdesc, 0, "\\SAM", 0)) hdesc->type = HTYPE_SAM;
else if (trav_path(hdesc, 0, "\\ControlSet", 0)) hdesc->type = HTYPE_SYSTEM;
else if (trav_path(hdesc, 0, "\\Policy", 0)) hdesc->type = HTYPE_SECURITY;
else if (trav_path(hdesc, 0, "\\Microsoft", 0)) hdesc->type = HTYPE_SOFTWARE;
if (verbose) printf("Type of hive guessed to be: %d\n",hdesc->type);
return(hdesc);
}
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