File: regedit.ml

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(* virt-v2v
 * Copyright (C) 2014 Red Hat Inc.
 *
 * 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.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *)

open Std_utils
open Tools_utils
open Common_gettext.Gettext

type regedits = regedit list
and regedit = regkeypath * regvalues
and regkeypath = string list
and regvalues = regvalue list
and regvalue = string * regtype
and regtype =
| REG_NONE
| REG_SZ of string
| REG_EXPAND_SZ of string
| REG_BINARY of string
| REG_DWORD of int32
| REG_MULTI_SZ of string list

let rec import_key ((g, root) : Registry.t) (path, values) =
  (* Create the path starting at the root node. *)
  let node = Registry.create_path (g, root) path in

  (* Delete any existing values in this node. *)
  (* g#hivex_node_set_values ...
     XXX Or at least, it would be nice to do this, but there is no
     binding for it in libguestfs.  I'm not sure how much this matters. *)

  (* Create the values. *)
  import_values g node values

and import_values g node = List.iter (import_value g node)

and import_value g node = function
  | key, REG_NONE -> g#hivex_node_set_value node key 0L ""
  (* All string registry fields have a terminating NUL, which in
   * UTF-16LE means they have 3 zero bytes -- the first is the high
   * byte from the last character, and the second and third are the
   * UTF-16LE encoding of ASCII NUL.  So we have to add two zero
   * bytes at the end of string fields.
   *)
  | key, REG_SZ s ->
    g#hivex_node_set_value node key 1L (Registry.encode_utf16le s ^ "\000\000")
  | key, REG_EXPAND_SZ s ->
    g#hivex_node_set_value node key 2L (Registry.encode_utf16le s ^ "\000\000")
  | key, REG_BINARY bin ->
    g#hivex_node_set_value node key 3L bin
  | key, REG_DWORD dw ->
    g#hivex_node_set_value node key 4L (le32_of_int (Int64.of_int32 dw))
  | key, REG_MULTI_SZ ss ->
    (* http://blogs.msdn.com/oldnewthing/archive/2009/10/08/9904646.aspx *)
    List.iter (fun s -> assert (s <> "")) ss;
    let ss = ss @ [""] in
    let ss = List.map (fun s -> Registry.encode_utf16le s ^ "\000\000") ss in
    let ss = String.concat "" ss in
    g#hivex_node_set_value node key 7L ss

let reg_import reg = List.iter (import_key reg)