--- /dev/null
+/*
+ Samba Unix/Linux SMB client utility editreg.c
+ Copyright (C) 2002 Richard Sharpe, rsharpe@richardsharpe.com
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+/*************************************************************************
+
+ A utility to edit a Windows NT/2K etc registry file.
+
+ Many of the ideas in here come from other people and software.
+ I first looked in Wine in misc/registry.c and was also influenced by
+ http://www.wednesday.demon.co.uk/dosreg.html
+
+ Which seems to contain comments from someone else. I reproduce them here
+ incase the site above disappears. It actually comes from
+ http://home.eunet.no/~pnordahl/ntpasswd/WinReg.txt.
+
+ The goal here is to read the registry into memory, manipulate it, and then
+ write it out if it was changed by any actions of the user.
+
+The windows NT registry has 2 different blocks, where one can occur many
+times...
+
+the "regf"-Block
+================
+
+"regf" is obviosly the abbreviation for "Registry file". "regf" is the
+signature of the header-block which is always 4kb in size, although only
+the first 64 bytes seem to be used and a checksum is calculated over
+the first 0x200 bytes only!
+
+Offset Size Contents
+0x00000000 D-Word ID: ASCII-"regf" = 0x66676572
+0x00000004 D-Word ???? //see struct REGF
+0x00000008 D-Word ???? Always the same value as at 0x00000004
+0x0000000C Q-Word last modify date in WinNT date-format
+0x00000014 D-Word 1
+0x00000018 D-Word 3
+0x0000001C D-Word 0
+0x00000020 D-Word 1
+0x00000024 D-Word Offset of 1st key record
+0x00000028 D-Word Size of the data-blocks (Filesize-4kb)
+0x0000002C D-Word 1
+0x000001FC D-Word Sum of all D-Words from 0x00000000 to
+0x000001FB //XOR of all words. Nigel
+
+I have analyzed more registry files (from multiple machines running
+NT 4.0 german version) and could not find an explanation for the values
+marked with ???? the rest of the first 4kb page is not important...
+
+the "hbin"-Block
+================
+I don't know what "hbin" stands for, but this block is always a multiple
+of 4kb in size.
+
+Inside these hbin-blocks the different records are placed. The memory-
+management looks like a C-compiler heap management to me...
+
+hbin-Header
+===========
+Offset Size Contents
+0x0000 D-Word ID: ASCII-"hbin" = 0x6E696268
+0x0004 D-Word Offset from the 1st hbin-Block
+0x0008 D-Word Offset to the next hbin-Block
+0x001C D-Word Block-size
+
+The values in 0x0008 and 0x001C should be the same, so I don't know
+if they are correct or swapped...
+
+From offset 0x0020 inside a hbin-block data is stored with the following
+format:
+
+Offset Size Contents
+0x0000 D-Word Data-block size //this size must be a
+multiple of 8. Nigel
+0x0004 ???? Data
+
+If the size field is negative (bit 31 set), the corresponding block
+is free and has a size of -blocksize!
+
+That does not seem to be true. All block lengths seem to be negative! (Richard Sharpe)
+
+The data is stored as one record per block. Block size is a multiple
+of 4 and the last block reaches the next hbin-block, leaving no room.
+
+Records in the hbin-blocks
+==========================
+
+nk-Record
+
+ The nk-record can be treated as a kombination of tree-record and
+ key-record of the win 95 registry.
+
+lf-Record
+
+ The lf-record is the counterpart to the RGKN-record (the
+ hash-function)
+
+vk-Record
+
+ The vk-record consists information to a single value.
+
+sk-Record
+
+ sk (? Security Key ?) is the ACL of the registry.
+
+Value-Lists
+
+ The value-lists contain information about which values are inside a
+ sub-key and don't have a header.
+
+Datas
+
+ The datas of the registry are (like the value-list) stored without a
+ header.
+
+All offset-values are relative to the first hbin-block and point to the
+block-size field of the record-entry. to get the file offset, you have to add
+the header size (4kb) and the size field (4 bytes)...
+
+the nk-Record
+=============
+Offset Size Contents
+0x0000 Word ID: ASCII-"nk" = 0x6B6E
+0x0002 Word for the root-key: 0x2C, otherwise 0x20 //key symbolic links 0x10. Nigel
+0x0004 Q-Word write-date/time in windows nt notation
+0x0010 D-Word Offset of Owner/Parent key
+0x0014 D-Word number of sub-Keys
+0x001C D-Word Offset of the sub-key lf-Records
+0x0024 D-Word number of values
+0x0028 D-Word Offset of the Value-List
+0x002C D-Word Offset of the sk-Record
+
+0x0030 D-Word Offset of the Class-Name //see NK structure for the use of these fields. Nigel
+0x0044 D-Word Unused (data-trash) //some kind of run time index. Does not appear to be important. Nigel
+0x0048 Word name-length
+0x004A Word class-name length
+0x004C ???? key-name
+
+the Value-List
+==============
+Offset Size Contents
+0x0000 D-Word Offset 1st Value
+0x0004 D-Word Offset 2nd Value
+0x???? D-Word Offset nth Value
+
+To determine the number of values, you have to look at the owner-nk-record!
+
+Der vk-Record
+=============
+Offset Size Contents
+0x0000 Word ID: ASCII-"vk" = 0x6B76
+0x0002 Word name length
+0x0004 D-Word length of the data //if top bit is set when offset contains data. Nigel
+0x0008 D-Word Offset of Data
+0x000C D-Word Type of value
+0x0010 Word Flag
+0x0012 Word Unused (data-trash)
+0x0014 ???? Name
+
+If bit 0 of the flag-word is set, a name is present, otherwise the value has no name (=default)
+
+If the data-size is lower 5, the data-offset value is used to store the data itself!
+
+The data-types
+==============
+Wert Beteutung
+0x0001 RegSZ: character string (in UNICODE!)
+0x0002 ExpandSZ: string with "%var%" expanding (UNICODE!)
+0x0003 RegBin: raw-binary value
+0x0004 RegDWord: Dword
+0x0007 RegMultiSZ: multiple strings, seperated with 0
+ (UNICODE!)
+
+The "lf"-record
+===============
+Offset Size Contents
+0x0000 Word ID: ASCII-"lf" = 0x666C
+0x0002 Word number of keys
+0x0004 ???? Hash-Records
+
+Hash-Record
+===========
+Offset Size Contents
+0x0000 D-Word Offset of corresponding "nk"-Record
+0x0004 D-Word ASCII: the first 4 characters of the key-name, padded with 0's. Case sensitiv!
+
+Keep in mind, that the value at 0x0004 is used for checking the data-consistency! If you change the
+key-name you have to change the hash-value too!
+
+//These hashrecords must be sorted low to high within the lf record. Nigel.
+
+The "sk"-block
+==============
+(due to the complexity of the SAM-info, not clear jet)
+(This is just a security descriptor in the data. R Sharpe.)
+
+
+Offset Size Contents
+0x0000 Word ID: ASCII-"sk" = 0x6B73
+0x0002 Word Unused
+0x0004 D-Word Offset of previous "sk"-Record
+0x0008 D-Word Offset of next "sk"-Record
+0x000C D-Word usage-counter
+0x0010 D-Word Size of "sk"-record in bytes
+???? //standard self
+relative security desciptor. Nigel
+???? ???? Security and auditing settings...
+????
+
+The usage counter counts the number of references to this
+"sk"-record. You can use one "sk"-record for the entire registry!
+
+Windows nt date/time format
+===========================
+The time-format is a 64-bit integer which is incremented every
+0,0000001 seconds by 1 (I don't know how accurate it realy is!)
+It starts with 0 at the 1st of january 1601 0:00! All values are
+stored in GMT time! The time-zone is important to get the real
+time!
+
+Common values for win95 and win-nt
+==================================
+Offset values marking an "end of list", are either 0 or -1 (0xFFFFFFFF).
+If a value has no name (length=0, flag(bit 0)=0), it is treated as the
+"Default" entry...
+If a value has no data (length=0), it is displayed as empty.
+
+simplyfied win-3.?? registry:
+=============================
+
++-----------+
+| next rec. |---+ +----->+------------+
+| first sub | | | | Usage cnt. |
+| name | | +-->+------------+ | | length |
+| value | | | | next rec. | | | text |------->+-------+
++-----------+ | | | name rec. |--+ +------------+ | xxxxx |
+ +------------+ | | value rec. |-------->+------------+ +-------+
+ v | +------------+ | Usage cnt. |
++-----------+ | | length |
+| next rec. | | | text |------->+-------+
+| first sub |------+ +------------+ | xxxxx |
+| name | +-------+
+| value |
++-----------+
+
+Greatly simplyfied structure of the nt-registry:
+================================================
+
++---------------------------------------------------------------+
+| |
+v |
++---------+ +---------->+-----------+ +----->+---------+ |
+| "nk" | | | lf-rec. | | | nk-rec. | |
+| ID | | | # of keys | | | parent |---+
+| Date | | | 1st key |--+ | .... |
+| parent | | +-----------+ +---------+
+| suk-keys|-----+
+| values |--------------------->+----------+
+| SK-rec. |---------------+ | 1. value |--> +----------+
+| class |--+ | +----------+ | vk-rec. |
++---------+ | | | .... |
+ v | | data |--> +-------+
+ +------------+ | +----------+ | xxxxx |
+ | Class name | | +-------+
+ +------------+ |
+ v
+ +---------+ +---------+
+ +----->| next sk |--->| Next sk |--+
+ | +---| prev sk |<---| prev sk | |
+ | | | .... | | ... | |
+ | | +---------+ +---------+ |
+ | | ^ |
+ | | | |
+ | +--------------------+ |
+ +----------------------------------+
+
+---------------------------------------------------------------------------
+
+Hope this helps.... (Although it was "fun" for me to uncover this things,
+ it took me several sleepless nights ;)
+
+ B.D.
+
+*************************************************************************/
+
+#include <stdio.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <sys/mman.h>
+#include <string.h>
+
+/*
+ * These definitions are for the in-memory registry structure.
+ * It is a tree structure that mimics what you see with tools like regedit
+ */
+
+/*
+ * DateTime struct for Windows
+ */
+
+typedef struct date_time_s {
+ int sec, microsec;
+} DATE_TIME;
+
+/*
+ * Definition of a Key. It has a name, classname, date/time last modified,
+ * sub-keys, values, and a security descriptor
+ */
+
+#define REG_ROOT_KEY 1
+#define REG_SUB_KEY 2
+
+typedef struct reg_key_s {
+ char *name; /* Name of the key */
+ char *class_name;
+ int type; /* One of REG_ROOT_KEY or REG_SUB_KEY */
+ DATE_TIME last_mod; /* Time last modified */
+ struct reg_key_s *owner;
+ struct key_list_s *sub_keys;
+ struct val_list_s *values;
+ struct key_sec_desc_s *security;
+} REG_KEY;
+
+/*
+ * The KEY_LIST struct lists sub-keys.
+ */
+
+typedef struct key_list_s {
+ int key_count;
+ REG_KEY keys[1];
+} KEY_LIST;
+
+typedef struct val_key_s {
+ char *name;
+ int has_name;
+ int data_type;
+ int data_len;
+ void *data_blk; /* Might want a separate block */
+} VAL_KEY;
+
+typedef struct val_list_s {
+ int val_count;
+ VAL_KEY vals[1];
+} VAL_LIST;
+
+#ifndef MAXSUBAUTHS
+#define MAXSUBAUTHS 15
+#endif
+
+typedef struct dom_sid_s {
+ unsigned char ver, auths;
+ unsigned char auth[6];
+ unsigned int sub_auths[MAXSUBAUTHS];
+} DOM_SID;
+
+typedef struct ace_struct_s {
+ unsigned char type, flags;
+ unsigned int perms; /* Perhaps a better def is in order */
+ DOM_SID trustee;
+} ACE;
+
+typedef struct acl_struct_s {
+ unsigned short rev, refcnt;
+ unsigned short num_aces;
+ ACE *aces[1];
+} ACL;
+
+typedef struct sec_desc_s {
+ unsigned int rev, type;
+ DOM_SID *owner, *group;
+ ACL *sacl, *dacl;
+} SEC_DESC;
+
+typedef struct key_sec_desc_s {
+ struct key_sec_desc_s *prev, *next;
+ int ref_cnt;
+ SEC_DESC *sec_desc;
+} KEY_SEC_DESC;
+
+
+/*
+ * An API for accessing/creating/destroying items above
+ */
+
+/* Make, delete keys */
+
+
+/*
+ * Create/delete key lists and add delete keys to/from a list, count the keys
+ */
+
+
+/*
+ * Create/delete value lists, add/delete values, count them
+ */
+
+
+/*
+ * Create/delete security descriptors, add/delete SIDS, count SIDS, etc.
+ * We reference count the security descriptors. Any new reference increments
+ * the ref count. If we modify an SD, we copy the old one, dec the ref count
+ * and make the change. We also want to be able to check for equality so
+ * we can reduce the number of SDs in use.
+ */
+
+
+/*
+ * Load and unload a registry file.
+ *
+ * Load, loads it into memory as a tree, while unload sealizes/flattens it
+ */
+
+/*
+ * Get the starting record for NT Registry file
+ */
+
+/* A map of sk offsets in the regf to KEY_SEC_DESCs for quick lookup etc */
+typedef struct sk_map_s {
+ int sk_off;
+ KEY_SEC_DESC *key_sec_desc;
+} SK_MAP;
+
+/*
+ * Where we keep all the regf stuff for one registry.
+ * This is the structure that we use to tie the in memory tree etc
+ * together. By keeping separate structs, we can operate on different
+ * registries at the same time.
+ * Currently, the SK_MAP is an array of mapping structure.
+ * Since we only need this on input and output, we fill in the structure
+ * as we go on input. On output, we know how many SK items we have, so
+ * we can allocate the structure as we need to.
+ * If you add stuff here that is dynamically allocated, add the
+ * appropriate free statements below.
+ */
+typedef struct regf_struct_s {
+ char *regfile_name, *outfile_name;
+ int fd;
+ struct stat sbuf;
+ char *base;
+ int modified;
+ REG_KEY *root; /* Root of the tree for this file */
+ int sk_count, sk_map_size;
+ SK_MAP **sk_map;
+} REGF;
+
+int nt_set_regf_input_file(REGF *regf, char *filename)
+{
+ return ((regf->regfile_name = strdup(filename)) != NULL);
+}
+
+int nt_set_regf_output_file(REGF *regf, char *filename)
+{
+ return ((regf->outfile_name = strdup(filename)) != NULL);
+}
+
+/* Free all the bits and pieces ... Assumes regf was malloc'd */
+/* If you add stuff to REGF, add the relevant free bits here */
+int nt_free_regf(REGF *regf)
+{
+ if (!regf) return;
+
+ if (regf->regfile_name) free(regf->regfile_name);
+ if (regf->outfile_name) free(regf->outfile_name);
+
+ /* Free the mmap'd area */
+
+ if (regf->base) munmap(regf->base, regf->sbuf.st_size);
+ regf->base = NULL;
+ close(regf->fd); /* Ignore the error :-) */
+
+ nt_free_reg_tree(regf->root); /* Free the tree */
+ free(regf->sk_map);
+ regf->sk_count = regf->sk_map_size = 0;
+
+ free(regf);
+
+}
+
+/* Get the header of the registry */
+int nt_get_regf_hdr(REGF *regf)
+{
+
+
+}
+
+int nt_get_hbin_hdr(REGF *regf, int hbin_offs)
+{
+
+
+}
git.samba.org / bbaumbach / samba-autobuild / .git / commitdiff