/usr/share/perl5/Parse/Win32Registry/WinNT/File.pm is in libparse-win32registry-perl 1.0-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 | package Parse::Win32Registry::WinNT::File;
use strict;
use warnings;
use base qw(Parse::Win32Registry::File);
use Carp;
use Encode;
use File::Basename;
use Parse::Win32Registry::Base qw(:all);
use Parse::Win32Registry::WinNT::Key;
use constant REGF_HEADER_LENGTH => 0x200;
use constant OFFSET_TO_FIRST_HBIN => 0x1000;
sub new {
my $class = shift;
my $filename = shift or croak "No filename specified";
open my $fh, '<', $filename or croak "Unable to open '$filename': $!";
# 0x00 dword = 'regf' signature
# 0x04 dword = seq1
# 0x08 dword = seq2
# 0x0c qword = timestamp
# 0x14 dword = major version
# 0x18 dword = minor version
# 0x1c dword = type (0 = registry file, 1 = log file)
# 0x20 dword = (1)
# 0x24 dword = offset to root key
# 0x28 dword = total length of all hbins (excludes header)
# 0x2c dword = (1)
# 0x30 = embedded filename
# Extracted offsets are always relative to first hbin
my $bytes_read = sysread($fh, my $regf_header, REGF_HEADER_LENGTH);
if ($bytes_read != REGF_HEADER_LENGTH) {
warnf('Could not read registry file header');
return;
}
my ($regf_sig,
$seq1,
$seq2,
$timestamp,
$major_version,
$minor_version,
$type,
$offset_to_root_key,
$total_hbin_length,
$embedded_filename,
) = unpack('a4VVa8VVVx4VVx4a64', $regf_header);
$offset_to_root_key += OFFSET_TO_FIRST_HBIN;
if ($regf_sig ne 'regf') {
warnf('Invalid registry file signature');
return;
}
$embedded_filename = unpack('Z*', decode('UCS-2LE', $embedded_filename));
# The header checksum is the xor of the first 127 dwords.
# The checksum is stored in the 128th dword, at offset 0x1fc (508).
my $checksum = 0;
foreach my $x (unpack('V127', $regf_header)) {
$checksum ^= $x;
}
my $embedded_checksum = unpack('x508V', $regf_header);
if ($checksum != $embedded_checksum) {
warnf('Invalid checksum for registry file header');
}
my $self = {};
$self->{_filehandle} = $fh;
$self->{_filename} = $filename;
$self->{_length} = (stat $fh)[7];
$self->{_offset_to_root_key} = $offset_to_root_key;
$self->{_timestamp} = unpack_windows_time($timestamp);
$self->{_embedded_filename} = $embedded_filename;
$self->{_seq1} = $seq1;
$self->{_seq2} = $seq2;
$self->{_version} = "$major_version.$minor_version";
$self->{_type} = $type;
$self->{_total_hbin_length} = $total_hbin_length;
$self->{_embedded_checksum} = $embedded_checksum;
$self->{_security_cache} = {}; # comment out to disable cache
bless $self, $class;
return $self;
}
sub get_root_key {
my $self = shift;
my $offset_to_root_key = $self->{_offset_to_root_key};
my $root_key = Parse::Win32Registry::WinNT::Key->new($self,
$offset_to_root_key);
return $root_key;
}
sub get_virtual_root_key {
my $self = shift;
my $fake_root = shift;
my $root_key = $self->get_root_key;
return if !defined $root_key;
if (!defined $fake_root) {
# guess virtual root from filename
my $filename = basename $self->{_filename};
if ($filename =~ /NTUSER/i) {
$fake_root = 'HKEY_CURRENT_USER';
}
elsif ($filename =~ /USRCLASS/i) {
$fake_root = 'HKEY_CLASSES_ROOT';
}
elsif ($filename =~ /SOFTWARE/i) {
$fake_root = 'HKEY_LOCAL_MACHINE\SOFTWARE';
}
elsif ($filename =~ /SYSTEM/i) {
$fake_root = 'HKEY_LOCAL_MACHINE\SYSTEM';
}
elsif ($filename =~ /SAM/i) {
$fake_root = 'HKEY_LOCAL_MACHINE\SAM';
}
elsif ($filename =~ /SECURITY/i) {
$fake_root = 'HKEY_LOCAL_MACHINE\SECURITY';
}
else {
$fake_root = 'HKEY_UNKNOWN';
}
}
$root_key->{_name} = $fake_root;
$root_key->{_key_path} = $fake_root;
return $root_key;
}
sub get_timestamp {
my $self = shift;
return $self->{_timestamp};
}
sub get_timestamp_as_string {
my $self = shift;
return iso8601($self->{_timestamp});
}
sub get_embedded_filename {
my $self = shift;
return $self->{_embedded_filename};
}
sub get_block_iterator {
my $self = shift;
my $offset_to_next_hbin = OFFSET_TO_FIRST_HBIN;
my $end_of_file = $self->{_length};
return Parse::Win32Registry::Iterator->new(sub {
if ($offset_to_next_hbin > $end_of_file) {
return; # no more hbins
}
if (my $hbin = Parse::Win32Registry::WinNT::Hbin->new($self,
$offset_to_next_hbin))
{
return unless $hbin->get_length > 0;
$offset_to_next_hbin += $hbin->get_length;
return $hbin;
}
else {
return; # no more hbins
}
});
}
*get_hbin_iterator = \&get_block_iterator;
sub _dump_security_cache {
my $self = shift;
if (defined(my $cache = $self->{_security_cache})) {
foreach my $offset (sort { $a <=> $b } keys %$cache) {
my $security = $cache->{$offset};
printf '0x%x %s\n', $offset, $security->as_string;
}
}
}
package Parse::Win32Registry::WinNT::Hbin;
use strict;
use warnings;
use base qw(Parse::Win32Registry::Entry);
use Carp;
use Parse::Win32Registry::Base qw(:all);
use Parse::Win32Registry::WinNT::Entry;
use constant HBIN_HEADER_LENGTH => 0x20;
sub new {
my $class = shift;
my $regfile = shift;
my $offset = shift;
croak 'Missing registry file' if !defined $regfile;
croak 'Missing offset' if !defined $offset;
my $fh = $regfile->get_filehandle;
# 0x00 dword = 'hbin' signature
# 0x04 dword = offset from first hbin to this hbin
# 0x08 dword = length of this hbin / relative offset to next hbin
# 0x14 qword = timestamp (first hbin only)
# Extracted offsets are always relative to first hbin
sysseek($fh, $offset, 0);
my $bytes_read = sysread($fh, my $hbin_header, HBIN_HEADER_LENGTH);
if ($bytes_read != HBIN_HEADER_LENGTH) {
return;
}
my ($sig,
$offset_to_hbin,
$length,
$timestamp) = unpack('a4VVx8a8x4', $hbin_header);
if ($sig ne 'hbin') {
return;
}
my $self = {};
$self->{_regfile} = $regfile;
$self->{_offset} = $offset;
$self->{_length} = $length;
$self->{_header_length} = HBIN_HEADER_LENGTH;
$self->{_allocated} = 1;
$self->{_tag} = $sig;
$self->{_timestamp} = unpack_windows_time($timestamp);
bless $self, $class;
return $self;
}
sub get_timestamp {
my $self = shift;
return $self->{_timestamp};
}
sub get_timestamp_as_string {
my $self = shift;
return iso8601($self->{_timestamp});
}
sub get_entry_iterator {
my $self = shift;
my $regfile = $self->{_regfile};
my $offset = $self->{_offset};
my $length = $self->{_length};
my $offset_to_next_entry = $offset + HBIN_HEADER_LENGTH;
my $end_of_hbin = $offset + $length;
return Parse::Win32Registry::Iterator->new(sub {
if ($offset_to_next_entry >= $end_of_hbin) {
return; # no more entries
}
if (my $entry = Parse::Win32Registry::WinNT::Entry->new($regfile,
$offset_to_next_entry))
{
return unless $entry->get_length > 0;
$offset_to_next_entry += $entry->get_length;
return $entry;
}
else {
return; # no more entries
}
});
}
1;
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