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chntpw-before.c
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chntpw-before.c
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/*
* chntpw.c - Offline Password Edit Utility for NT 3.51 4.0 5.0 5.1 6.0 SAM database.
*
* This program uses the "ntreg" library to load and access the registry, it's purpose
* is to reset password based information.
* There is also a simple commandline based registry editor included.
*
* 2008-mar: 64 bit compatible patch set by NN
* 2007-sep: Group handling extended, promotion now public
* 2007-sep: User edit menu, some changes to user info edit
* 2007-apr-may: Get and display users group memberships
* 2007-apr: GNU license. Some bugfixes. Cleaned up some output.
* 2004-aug: More stuff in regedit. Stringinput bugfixes.
* 2004-jan: Changed some of the verbose/debug stuff
* 2003-jan: Changed to use more of struct based V + some small stuff
* 2003-jan: Support in ntreg for adding keys etc. Editor updated.
* 2002-dec: New option: Specify user using RID
* 2002-dec: New option: blank the pass (zero hash lengths).
* 2001-jul: extra blank password logic (when NT or LANMAN hash missing)
* 2001-jan: patched & changed to use OpenSSL. Thanks to Denis Ducamp
* 2000-jun: changing passwords regardless of syskey.
* 2000-jun: syskey disable works on NT4. Not properly on NT5.
* 2000-jan: Attempt to detect and disable syskey
* 1999-feb: Now able to browse registry hives. (write support to come)
* See HISTORY.txt for more detailed info on history.
*
*****
*
* Copyright (c) 1997-2007 Petter Nordahl-Hagen.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* See file GPL.txt for the full license.
*
*****
*
* Information and ideas taken from pwdump by Jeremy Allison.
*
* More info from NTCrack by Jonathan Wilkins.
*
*/
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <inttypes.h>
#include <openssl/des.h>
#include <openssl/md4.h>
#define uchar u_char
#define MD4Init MD4_Init
#define MD4Update MD4_Update
#define MD4Final MD4_Final
#include "ntreg.h"
#include "sam.h"
const char chntpw_version[] = "chntpw version 0.99.6 080320 (sixtyfour), (c) Petter N Hagen";
extern char *val_types[REG_MAX+1];
/* Global verbosity */
int gverbose = 0;
#define MAX_HIVES 10
/* Array of loaded hives */
struct hive *hive[MAX_HIVES+1];
int no_hives = 0;
/* Icky icky... globals used to refer to hives, will be
* set when loading, so that hives can be loaded in any order
*/
int H_SAM = -1;
int H_SYS = -1;
int H_SEC = -1;
int H_SOF = -1;
int syskeyreset = 0;
int dirty = 0;
int max_sam_lock = 0;
/*
* of user with RID 500, because silly MS decided
* to localize the bloody admin-username!! AAAGHH!
*/
char admuser[129]="Administrator";
/* ============================================================== */
/* Crypto-stuff & support for what we'll do in the V-value */
/* Zero out string for lanman passwd, then uppercase
* the supplied password and put it in here */
void make_lanmpw(char *p, char *lm, int len)
{
int i;
for (i=0; i < 15; i++) lm[i] = 0;
for (i=0; i < len; i++) lm[i] = toupper(p[i]);
}
/*
* Convert a 7 byte array into an 8 byte des key with odd parity.
*/
void str_to_key(unsigned char *str,unsigned char *key)
{
int i;
key[0] = str[0]>>1;
key[1] = ((str[0]&0x01)<<6) | (str[1]>>2);
key[2] = ((str[1]&0x03)<<5) | (str[2]>>3);
key[3] = ((str[2]&0x07)<<4) | (str[3]>>4);
key[4] = ((str[3]&0x0F)<<3) | (str[4]>>5);
key[5] = ((str[4]&0x1F)<<2) | (str[5]>>6);
key[6] = ((str[5]&0x3F)<<1) | (str[6]>>7);
key[7] = str[6]&0x7F;
for (i=0;i<8;i++) {
key[i] = (key[i]<<1);
}
DES_set_odd_parity((des_cblock *)key);
}
/*
* Function to convert the RID to the first decrypt key.
*/
void sid_to_key1(uint32_t sid,unsigned char deskey[8])
{
unsigned char s[7];
s[0] = (unsigned char)(sid & 0xFF);
s[1] = (unsigned char)((sid>>8) & 0xFF);
s[2] = (unsigned char)((sid>>16) & 0xFF);
s[3] = (unsigned char)((sid>>24) & 0xFF);
s[4] = s[0];
s[5] = s[1];
s[6] = s[2];
str_to_key(s,deskey);
}
/*
* Function to convert the RID to the second decrypt key.
*/
void sid_to_key2(uint32_t sid,unsigned char deskey[8])
{
unsigned char s[7];
s[0] = (unsigned char)((sid>>24) & 0xFF);
s[1] = (unsigned char)(sid & 0xFF);
s[2] = (unsigned char)((sid>>8) & 0xFF);
s[3] = (unsigned char)((sid>>16) & 0xFF);
s[4] = s[0];
s[5] = s[1];
s[6] = s[2];
str_to_key(s,deskey);
}
/* DES encrypt, for LANMAN */
void E1(uchar *k, uchar *d, uchar *out)
{
des_key_schedule ks;
des_cblock deskey;
str_to_key(k,(uchar *)deskey);
#ifdef __FreeBSD__
des_set_key(&deskey,ks);
#else /* __FreeBsd__ */
des_set_key((des_cblock *)deskey,ks);
#endif /* __FreeBsd__ */
des_ecb_encrypt((des_cblock *)d,(des_cblock *)out, ks, DES_ENCRYPT);
}
/* Check if hive is SAM, and if it is, extract some
* global policy information from it, like lockout counts etc
*/
void check_get_samdata(void)
{
struct accountdb_F *f;
struct keyval *v;
if (H_SAM >= 0) {
/* Get users F value */
v = get_val2buf(hive[H_SAM], NULL, 0, ACCOUNTDB_F_PATH, REG_BINARY, TPF_VK);
if (!v) {
printf("Login counts data not found in SAM\n");
return;
}
printf("\n* SAM policy limits:\n");
f = (struct accountdb_F *)&v->data;
max_sam_lock = f->locklimit;
printf("Failed logins before lockout is: %d\n",max_sam_lock);
printf("Minimum password length : %d\n",f->minpwlen);
printf("Password history count : %d\n",f->minpwlen);
}
}
/* Try to decode and possibly change account lockout etc
* This is \SAM\Domains\Account\Users\<RID>\F
* It's size seems to always be 0x50.
* Params: RID - user ID, mode - 0 silent, 1 silent, 2 edit.
* Returns: ACB bits with high bit set if lockout count is >0
*/
short handle_F(int rid, int mode)
{
struct user_F *f;
char s[200];
struct keyval *v;
unsigned short acb;
int b;
if (H_SAM < 0) return(0);
/* Get users F value */
snprintf(s,180,"\\SAM\\Domains\\Account\\Users\\%08X\\F",rid);
v = get_val2buf(hive[H_SAM], NULL, 0, s, REG_BINARY, TPF_VK_EXACT);
if (!v) {
printf("Cannot find value <%s>\n",s);
return(0);
}
if (v->len < 0x48) {
printf("handle_F: F value is 0x%x bytes, need >= 0x48, unable to check account flags!\n",v->len);
FREE(v);
return(0);
}
f = (struct user_F *)&v->data;
acb = f->ACB_bits;
if (mode == 1) {
printf("Account bits: 0x%04x =\n",acb);
for (b=0; b < 15; b++) {
printf("[%s] %-15.15s | ",
(acb & (1<<b)) ? "X" : " ", acb_fields[b] );
if (b%3 == 2) printf("\n");
}
printf("\nFailed login count: %u, while max tries is: %u\n",f->failedcnt,max_sam_lock);
printf("Total login count: %u\n",f->logins);
}
if (mode == 2) {
acb |= ACB_PWNOEXP;
acb &= ~ACB_DISABLED;
acb &= ~ACB_AUTOLOCK;
f->ACB_bits = acb;
f->failedcnt = 0;
put_buf2val(hive[H_SAM], v, 0, s, REG_BINARY,TPF_VK_EXACT);
printf("Unlocked!\n");
}
return (acb | ( (f->failedcnt > 0 && f->failedcnt >= max_sam_lock)<<15 ) | (acb & ACB_AUTOLOCK)<<15 | (acb & ACB_DISABLED)<<15);
}
/* List users membership or check if admin (is in admin group)
* rid - users rid
* check - if 1 just check if admin, do not list
* returns true if user is admin
*/
int list_user_groups(int rid, int check)
{
char s[200];
char g[200];
char groupname[128];
int nk = 0;
struct keyval *m = NULL, *c = NULL;
struct group_C *cd;
unsigned int *grps;
int count = 0, isadmin = 0;
int i, size, grp, grpnamoffs, grpnamlen;
if (!rid || (H_SAM < 0)) return(0);
/* Get member list for user. Go for the first full SID, it's usually local computer I hope */
snprintf(s,180,"\\SAM\\Domains\\Builtin\\Aliases\\Members\\S-1-5-21-\\%08X",rid);
/* Now, the TYPE field is the number of groups the user is member of */
/* Don't we just love the inconsistent use of fields!! */
nk = trav_path(hive[H_SAM], 0, s, 0);
if (!nk) {
/* This probably means user is not in any group. Seems to be the case
for a couple of XPs built in support / guest users. So just return */
if (gverbose) printf("list_user_groups(): Cannot find RID under computer SID <%s>\n",s);
return(0);
}
nk += 4;
count = get_val_type(hive[H_SAM],nk,"@",TPF_VK_EXACT);
if (count == -1) {
printf("list_user_groups(): Cannot find value <%s\\@>\n",s);
return(0);
}
if (!check) printf("User is member of %d groups:\n",count);
/* This is the data size */
size = get_val_len(hive[H_SAM],nk,"@",TPF_VK_EXACT);
/* It should be 4 bytes for each group */
if (gverbose) printf("Data size %d bytes.\n",size);
if (size != count * 4) {
printf("list_user_groups(): DEBUG: Size is not 4 * count! May not matter anyway. Continuing..\n");
}
m = get_val2buf(hive[H_SAM], NULL, nk, "@", 0, TPF_VK_EXACT);
if (!m) {
printf("list_user_groups(): Could not get value data! Giving up.\n");
return(0);
}
grps = (unsigned int *)&m->data;
for (i = 0; i < count; i++) {
grp = grps[i];
if (!check) printf("%08x ",grp);
if (grp == 0x220) isadmin = 1;
if (!check) {
snprintf(g,180,"\\SAM\\Domains\\Builtin\\Aliases\\%08X\\C",grp);
c = get_val2buf(hive[H_SAM], NULL, 0, g, 0, TPF_VK_EXACT);
if (c) {
cd = (struct group_C *)&c->data;
grpnamoffs = cd->grpname_ofs + 0x34;
grpnamlen = cd->grpname_len;
cheap_uni2ascii((char *)cd + grpnamoffs, groupname, grpnamlen);
printf("= %s (which has %d members)\n",groupname,cd->grp_members);
} else {
printf("Group info for %x not found!\n",grp);
}
}
}
return(isadmin);
}
/* Promote user into administrators group (group ID 0x220)
* And remove from all others...
* rid - users rid
* no returns yet
* THIS IS VERY HACKISH YET
*/
void promote_user(int rid)
{
char s[200];
char g[200];
int nk = 0;
struct keyval *m = NULL, *c = NULL;
struct keyval admember = { 4, 0x220 };
unsigned int *grps, *gcnts;
int count = 0;
int i, size, grp;
if (!rid || (H_SAM < 0)) return;
/* Get member list for user. Go for the first full SID, it's usually local computer I hope */
snprintf(s,180,"\\SAM\\Domains\\Builtin\\Aliases\\Members\\S-1-5-21-\\%08X",rid);
/* Now, the TYPE field is the number of groups the user is member of */
/* Don't we just love the inconsistent use of fields!! */
nk = trav_path(hive[H_SAM], 0, s, 0);
if (!nk) {
printf("Cannot find path <%s>\n",s);
return;
}
nk += 4;
count = get_val_type(hive[H_SAM],nk,"@",TPF_VK);
if (count == -1) {
printf("Cannot find value <%s\\@>\n",s);
return;
}
printf("User is member of %d groups.\n",count);
/* This is the data size */
size = get_val_len(hive[H_SAM],nk,"@",TPF_VK);
/* It should be 4 bytes for each group */
printf("Data size %d bytes.\n",size);
if (size != count * 4) {
printf("DEBUG: Size is not 4 * count! May not matter anyway. Continuing..\n");
}
m = get_val2buf(hive[H_SAM], NULL, nk, "@", 0, TPF_VK);
if (!m) {
printf("Could not get value data! Giving up.\n");
return;
}
printf("User was member of groups: ");
grps = (unsigned int *)&m->data;
for (i = 0; i < count; i++) {
grp = grps[i];
printf("%08x ",grp);
switch (grp) {
case 0x220: printf("=Administrators, "); break;
case 0x221: printf("=Users, "); break;
case 0x222: printf("=Guests, "); break;
default: printf(", "); break;
}
snprintf(g,180,"\\SAM\\Domains\\Builtin\\Aliases\\%08X\\C",grp);
c = get_val2buf(hive[H_SAM], NULL, 0, g, 0, TPF_VK);
if (c) {
gcnts = (unsigned int *)&c->data;
gcnts[0xc]--;
/* Decrease members counter */
put_buf2val(hive[H_SAM], c, 0, g, 0, TPF_VK);
} else {
printf("Group info for %x not found!\n",grp);
}
}
#if 1
printf("\nDeleting user memberships\n");
del_value(hive[H_SAM], nk, "@", 0);
printf("Adding into only administrators:\n");
if (!add_value(hive[H_SAM], nk, "@", 1)) { /* Type is # of groups, here 1 */
printf("Failed to add @ value to key\n");
}
#endif
put_buf2val(hive[H_SAM], &admember, nk, "@", 0, TPF_VK);
/* Now bumb up administrator groups count */
c = get_val2buf(hive[H_SAM], NULL, 0, "\\SAM\\Domains\\Builtin\\Aliases\\00000220\\C", 0, TPF_VK);
if (!c) printf("Group info for 220 (adm) not found!\n");
gcnts = (unsigned int *)&c->data;
gcnts[0xc]++;
put_buf2val(hive[H_SAM], c, 0, "\\SAM\\Domains\\Builtin\\Aliases\\00000220\\C", 0, TPF_VK);
printf("Promotion DONE!\n");
}
/* Decode the V-struct, and change the password
* vofs - offset into SAM buffer, start of V struct
* rid - the users RID, required for the DES decrypt stage
*
* Some of this is ripped & modified from pwdump by Jeremy Allison
*
*/
char *change_pw(char *buf, int rid, int vlen, int stat)
{
uchar x1[] = {0x4B,0x47,0x53,0x21,0x40,0x23,0x24,0x25};
char yn[4];
int pl;
char *vp;
static char username[128],fullname[128];
char comment[128],homedir[128],md4[32],lanman[32];
char newunipw[34], newp[20], despw[20], newlanpw[16], newlandes[20];
int username_offset,username_len;
int fullname_offset,fullname_len;
int comment_offset,comment_len;
int homedir_offset,homedir_len;
int ntpw_len,lmpw_len,ntpw_offs,lmpw_offs,i;
int dontchange = 0;
struct user_V *v;
des_key_schedule ks1, ks2;
des_cblock deskey1, deskey2;
MD4_CTX context;
unsigned char digest[16];
unsigned short acb;
v = (struct user_V *)buf;
vp = buf;
username_offset = v->username_ofs;
username_len = v->username_len;
fullname_offset = v->fullname_ofs;
fullname_len = v->fullname_len;
comment_offset = v->comment_ofs;
comment_len = v->comment_len;
homedir_offset = v->homedir_ofs;
homedir_len = v->homedir_len;
lmpw_offs = v->lmpw_ofs;
lmpw_len = v->lmpw_len;
ntpw_offs = v->ntpw_ofs;
ntpw_len = v->ntpw_len;
if (!rid) {
printf("No RID given. Unable to change passwords..\n");
return(0);
}
if (gverbose) {
printf("lmpw_offs: 0x%x, lmpw_len: %d (0x%x)\n",lmpw_offs,lmpw_len,lmpw_len);
printf("ntpw_offs: 0x%x, ntpw_len: %d (0x%x)\n",ntpw_offs,ntpw_len,ntpw_len);
}
*username = 0;
*fullname = 0;
*comment = 0;
*homedir = 0;
if(username_len <= 0 || username_len > vlen ||
username_offset <= 0 || username_offset >= vlen ||
comment_len < 0 || comment_len > vlen ||
fullname_len < 0 || fullname_len > vlen ||
homedir_offset < 0 || homedir_offset >= vlen ||
comment_offset < 0 || comment_offset >= vlen ||
lmpw_offs < 0 || lmpw_offs >= vlen)
{
if (stat != 1) printf("change_pw: Not a legal V struct? (negative struct lengths)\n");
return(NULL);
}
/* Offsets in top of struct is relative to end of pointers, adjust */
username_offset += 0xCC;
fullname_offset += 0xCC;
comment_offset += 0xCC;
homedir_offset += 0xCC;
ntpw_offs += 0xCC;
lmpw_offs += 0xCC;
cheap_uni2ascii(vp + username_offset,username,username_len);
cheap_uni2ascii(vp + fullname_offset,fullname,fullname_len);
cheap_uni2ascii(vp + comment_offset,comment,comment_len);
cheap_uni2ascii(vp + homedir_offset,homedir,homedir_len);
#if 0
/* Reset hash-lengths to 16 if syskey has been reset */
if (syskeyreset && ntpw_len > 16 && !stat) {
ntpw_len = 16;
lmpw_len = 16;
ntpw_offs -= 4;
(unsigned int)*(vp+0xa8) = ntpw_offs - 0xcc;
*(vp + 0xa0) = 16;
*(vp + 0xac) = 16;
}
#endif
if (stat) {
acb = handle_F(rid,0);
printf("| %04x | %-30.30s | %-6s | %-8s |\n",
rid, username, (list_user_groups(rid,1) ? "ADMIN" : "") , ( acb & 0x8000 ? "dis/lock" : (ntpw_len < 16) ? "*BLANK*" : "") );
return(username);
}
printf("\nRID : %04d [%04x]\n",rid,rid);
printf("Username: %s\n",username);
printf("fullname: %s\n",fullname);
printf("comment : %s\n",comment);
printf("homedir : %s\n\n",homedir);
list_user_groups(rid,0);
printf("\n");
acb = handle_F(rid,1);
if (lmpw_len < 16 && gverbose) {
printf("** LANMAN password not set. User MAY have a blank password.\n** Usually safe to continue. Normal in Vista\n");
}
if (ntpw_len < 16) {
printf("** No NT MD4 hash found. This user probably has a BLANK password!\n");
if (lmpw_len < 16) {
printf("** No LANMAN hash found either. Sorry, cannot change. Try login with no password!\n");
dontchange = 1;
} else {
printf("** LANMAN password IS however set. Will now install new password as NT pass instead.\n");
printf("** NOTE: Continue at own risk!\n");
ntpw_offs = lmpw_offs;
*(vp+0xa8) = ntpw_offs - 0xcc;
ntpw_len = 16;
lmpw_len = 0;
}
}
if (gverbose) {
hexprnt("Crypted NT pw: ",(unsigned char *)(vp+ntpw_offs),16);
hexprnt("Crypted LM pw: ",(unsigned char *)(vp+lmpw_offs),16);
}
/* Get the two decrpt keys. */
sid_to_key1(rid,(unsigned char *)deskey1);
des_set_key((des_cblock *)deskey1,ks1);
sid_to_key2(rid,(unsigned char *)deskey2);
des_set_key((des_cblock *)deskey2,ks2);
/* Decrypt the NT md4 password hash as two 8 byte blocks. */
des_ecb_encrypt((des_cblock *)(vp+ntpw_offs ),
(des_cblock *)md4, ks1, DES_DECRYPT);
des_ecb_encrypt((des_cblock *)(vp+ntpw_offs + 8),
(des_cblock *)&md4[8], ks2, DES_DECRYPT);
/* Decrypt the lanman password hash as two 8 byte blocks. */
des_ecb_encrypt((des_cblock *)(vp+lmpw_offs),
(des_cblock *)lanman, ks1, DES_DECRYPT);
des_ecb_encrypt((des_cblock *)(vp+lmpw_offs + 8),
(des_cblock *)&lanman[8], ks2, DES_DECRYPT);
if (gverbose) {
hexprnt("MD4 hash : ",(unsigned char *)md4,16);
hexprnt("LANMAN hash : ",(unsigned char *)lanman,16);
}
printf("\n- - - - User Edit Menu:\n");
printf(" 1 - Clear (blank) user password\n"
" 2 - Edit (set new) user password (careful with this on XP or Vista)\n"
" 3 - Promote user (make user an administrator)\n");
printf("%s4 - Unlock and enable user account%s\n", (acb & 0x8000) ? " " : "(",
(acb & 0x8000) ? " [probably locked now]" : ") [seems unlocked already]");
printf(" q - Quit editing user, back to user select\n");
pl = fmyinput("Select: [q] > ",newp,16);
if ( (pl < 1) || (*newp == 'q') || (*newp == 'Q')) return(0);
if (*newp == '3') {
printf("NOTE: This function is still experimental, and in some cases it\n"
" may result in stangeness when editing user/group in windows.\n"
" Also, users (like Guest often is) may still be prevented\n"
" from login via security/group policies which is not changed.\n");
fmyinput("Do you still want to promote the user? (y/n) [n] ",yn,2);
if (*yn == 'y' || *yn == 'Y') {
promote_user(rid);
}
return(username);
}
if (*newp == '4') {
acb = handle_F(rid,2);
return(username);
}
if (*newp == '2') {
if (dontchange) {
printf("Sorry, unable to edit since password seems blank already (thus no space for it)\n");
return(0);
}
pl = fmyinput("New Password: ",newp,16);
if (pl < 1) {
printf("No change.\n");
return(0);
}
cheap_ascii2uni(newp,newunipw,pl);
make_lanmpw(newp,newlanpw,pl);
/* printf("Ucase Lanman: %s\n",newlanpw); */
MD4Init (&context);
MD4Update (&context, newunipw, pl<<1);
MD4Final (digest, &context);
if (gverbose) hexprnt("\nNEW MD4 hash : ",digest,16);
E1((uchar *)newlanpw, x1, (uchar *)lanman);
E1((uchar *)newlanpw+7, x1, (uchar *)lanman+8);
if (gverbose) hexprnt("NEW LANMAN hash : ",(unsigned char *)lanman,16);
/* Encrypt the NT md4 password hash as two 8 byte blocks. */
des_ecb_encrypt((des_cblock *)digest,
(des_cblock *)despw, ks1, DES_ENCRYPT);
des_ecb_encrypt((des_cblock *)(digest+8),
(des_cblock *)&despw[8], ks2, DES_ENCRYPT);
des_ecb_encrypt((des_cblock *)lanman,
(des_cblock *)newlandes, ks1, DES_ENCRYPT);
des_ecb_encrypt((des_cblock *)(lanman+8),
(des_cblock *)&newlandes[8], ks2, DES_ENCRYPT);
if (gverbose) {
hexprnt("NEW DES crypt : ",(unsigned char *)despw,16);
hexprnt("NEW LANMAN crypt: ",(unsigned char *)newlandes,16);
}
/* Reset hash length to 16 if syskey enabled, this will cause
* a conversion to syskey-hashes upon next boot */
if (syskeyreset && ntpw_len > 16) {
ntpw_len = 16;
lmpw_len = 16;
ntpw_offs -= 4;
*(vp+0xa8) = (unsigned int)(ntpw_offs - 0xcc);
*(vp + 0xa0) = 16;
*(vp + 0xac) = 16;
}
for (i = 0; i < 16; i++) {
*(vp+ntpw_offs+i) = (unsigned char)despw[i];
if (lmpw_len >= 16) *(vp+lmpw_offs+i) = (unsigned char)newlandes[i];
}
printf("Password changed!\n");
} /* new password */
else if (pl == 1 && *newp == '1') {
/* Setting hash lengths to zero seems to make NT think it is blank
* However, since we cant cut the previous hash bytes out of the V value
* due to missing resize-support of values, it may leak about 40 bytes
* each time we do this.
*/
v->ntpw_len = 0;
v->lmpw_len = 0;
printf("Password cleared!\n");
}
#if 0
hexprnt("Pw in buffer: ",(vp+ntpw_offs),16);
hexprnt("Lm in buffer: ",(vp+lmpw_offs),16);
#endif
dirty = 1;
return(username);
}
/* Here we put our knowledge to use, basic routines to
* decode and display registry contents almost like a filesystem
*/
/* display (cat) the value,
* vofs = offset to 'nk' node, paths relative to this (or 0 for root)
* path = path string to value
* Does not handle all types yet (does a hexdump instead)
* MULTI_SZ (multi unicode-string) - only displays first string,
* but also does a hexdump.
*/
void cat_vk(struct hive *hdesc, int nkofs, char *path, int dohex)
{
void *data;
int len,i,type;
char string[SZ_MAX+1];
type = get_val_type(hdesc, nkofs, path, 0);
if (type == -1) {
printf("cat_vk: No such value <%s>\n",path);
return;
}
len = get_val_len(hdesc, nkofs, path, 0);
if (!len) {
printf("cat_vk: Value <%s> has zero length\n",path);
return;
}
data = (void *)get_val_data(hdesc, nkofs, path, 0, 0);
if (!data) {
printf("cat_vk: Value <%s> references NULL-pointer (bad boy!)\n",path);
abort();
return;
}
printf("Value <%s> of type %s, data length %d [0x%x]\n", path,
(type < REG_MAX ? val_types[type] : "(unknown)"), len, len);
if (dohex) type = REG_BINARY;
switch (type) {
case REG_SZ:
case REG_EXPAND_SZ:
case REG_MULTI_SZ:
cheap_uni2ascii(data,string,len);
for (i = 0; i < (len>>1)-1; i++) {
if (string[i] == 0) string[i] = '\n';
if (type == REG_SZ) break;
}
puts(string);
break;
case REG_DWORD:
printf("0x%08x",*(unsigned short *)data);
break;
default:
printf("Don't know how to handle type yet!\n");
case REG_BINARY:
hexdump((char *)data, 0, len, 1);
}
putchar('\n');
}
/* =================================================================== */
/* Registry editor frontend */
struct cmds {
char cmd_str[12];
int cmd_num;
};
#define MCMD_CD 1
#define MCMD_LS 2
#define MCMD_QUIT 3
#define MCMD_CAT 4
#define MCMD_STRUCT 5
#define MCMD_DEBUG 6
#define MCMD_HELP 7
#define MCMD_EXPORTKEY 8
#define MCMD_HIVE 9
#define MCMD_EDIT 10
#define MCMD_ALLOC 11
#define MCMD_FREE 12
#define MCMD_ADDV 13
#define MCMD_DELV 14
#define MCMD_DELVALL 15
#define MCMD_NEWKEY 16
#define MCMD_DELKEY 17
#define MCMD_CATHEX 18
#define MCMD_RDEL 19
#define MCMD_CK 20
struct cmds maincmds[] = {
{ "cd" , MCMD_CD } ,
{ "ls" , MCMD_LS } ,
{ "dir", MCMD_LS } ,
{ "q" , MCMD_QUIT } ,
{ "cat", MCMD_CAT } ,
{ "type",MCMD_CAT } ,
{ "st" , MCMD_STRUCT } ,
{ "debug", MCMD_DEBUG } ,
{ "hive", MCMD_HIVE } ,
{ "ed", MCMD_EDIT } ,
#if ALLOC_DEBUG
{ "alloc", MCMD_ALLOC } ,
{ "free", MCMD_FREE } ,
#endif
{ "nv", MCMD_ADDV } ,
{ "dv", MCMD_DELV } ,
{ "delallv", MCMD_DELVALL } ,
{ "nk", MCMD_NEWKEY } ,
{ "dk", MCMD_DELKEY } ,
{ "hex", MCMD_CATHEX } ,
{ "rdel", MCMD_RDEL } ,
{ "ek", MCMD_EXPORTKEY },
{ "ck", MCMD_CK } ,
{ "?", MCMD_HELP } ,
{ "", 0 }
};
/* Edit value: Invoke whatever is needed to edit it
* based on its type
*/
void edit_val(struct hive *h, int nkofs, char *path)
{
struct keyval *kv, *newkv;
int type,len,n,i,in,go, newsize, d = 0, done, insert = 0;
char inbuf[SZ_MAX+4];
char origstring[SZ_MAX+4];
char *newstring;
char *dbuf;
type = get_val_type(h, nkofs, path, TPF_VK);
if (type == -1) {
printf("Value <%s> not found!\n",path);
return;
}
kv = get_val2buf(h, NULL, nkofs, path, type, TPF_VK);
if (!kv) {
printf("Unable to get data of value <%s>\n",path);
return;
}
len = kv->len;
printf("EDIT: <%s> of type %s with length %d [0x%x]\n", path,
(type < REG_MAX ? val_types[type] : "(unknown)"),
len, len);
switch(type) {
case REG_DWORD:
printf("DWORD: Old value %d [0x%x], ", kv->data, kv->data);
fmyinput("enter new value (prepend 0x if hex, empty to keep old value)\n-> ",
inbuf, 12);
if (*inbuf) {
sscanf(inbuf,"%i",&kv->data);
d = 1;
}
printf("DWORD: New value %d [0x%x], ", kv->data, kv->data);
break;
case REG_SZ:
case REG_EXPAND_SZ:
case REG_MULTI_SZ:
newstring = NULL;
dbuf = (char *)&kv->data;
cheap_uni2ascii(dbuf,origstring,len);
n = 0; i = 0;
while (i < (len>>1)-1) {
printf("[%2d]: %s\n",n,origstring+i);
i += strlen(origstring+i) + 1;
n++;
}
printf("\nNow enter new strings, one by one.\n");
printf("Enter nothing to keep old.\n");
if (type == REG_MULTI_SZ) {
printf("'--n' to quit (remove rest of strings)\n");
printf("'--i' insert new string at this point\n");
printf("'--q' to quit (leaving remaining strings as is)\n");
printf("'--Q' to quit and discard all changes\n");
printf("'--e' for empty string in this position\n");
}
n = 0; i = 0; in = 0; go = 0; done = 0;
/* Now this one is RATHER UGLY :-} */
while (i < (len>>1)-1 || !done) {
printf("[%2d]: %s\n",n, insert == 1 ? "[INSERT]" : ((i < (len>>1)-1 ) ? origstring+i : "[NEW]"));
if (insert) insert++;
if (!go) fmyinput("-> ",inbuf, 500);
else *inbuf = 0;
if (*inbuf && strcmp("--q", inbuf)) {
if (!strcmp("--n", inbuf) || !strcmp("--Q", inbuf)) { /* Zap rest */
i = (len>>1) ; done = 1;
} else if (strcmp("--i", inbuf)) { /* Copy out given string */
if (!strcmp("--e",inbuf)) *inbuf = '\0';
if (newstring) newstring = realloc(newstring, in+strlen(inbuf)+1);
else newstring = malloc(in+strlen(inbuf)+1);
strcpy(newstring+in, inbuf);
in += strlen(inbuf)+1;
} else {
insert = 1;
}
} else { /* Copy out default string */
if (newstring) newstring = realloc(newstring, in+strlen(origstring+i)+1);
else newstring = malloc(in + strlen(origstring+i) + 1);
strcpy(newstring+in, origstring+i);
in += strlen(origstring+i)+1;
if (!strcmp("--q", inbuf)) {
go = 1; done = 1;
if (!(i < (len>>1)-1 )) {
in--; /* remove last empty if in NEW-mode */
}
}
}
if (!insert) i += strlen(origstring+i) + 1;
if (insert != 1) n++;
if (insert == 2) insert = 0;
if (type != REG_MULTI_SZ) {
i = (len<<1);
done = 1;
}
}
if (strcmp("--Q", inbuf)) { /* We didn't bail out */
if (newstring) newstring = realloc(newstring, in+1);
else newstring = malloc(in+1);
if (type == REG_MULTI_SZ) {
in++;
*(newstring+in) = '\0'; /* Must add null termination */
}
ALLOC(newkv,1,(in<<1)+sizeof(int));
newkv->len = in<<1;
printf("newkv->len: %d\n",newkv->len);
cheap_ascii2uni(newstring, (char *)&(newkv->data), in);
d = 1;