| 1 |
boklm |
1064 |
package MGATools::iso; |
| 2 |
|
|
|
| 3 |
|
|
use strict; |
| 4 |
|
|
use Digest::MD5; |
| 5 |
|
|
|
| 6 |
|
|
require Exporter; |
| 7 |
|
|
use URPM; |
| 8 |
|
|
our @ISA = qw(Exporter);; |
| 9 |
|
|
our @EXPORT = qw(include_md5); |
| 10 |
|
|
our ($INFO_OFFSET, $SIZE_OFFSET, $SKIP); |
| 11 |
|
|
$INFO_OFFSET = 883; |
| 12 |
|
|
$SIZE_OFFSET = 84; |
| 13 |
|
|
$SKIP = 15; |
| 14 |
|
|
|
| 15 |
|
|
=head1 NAME |
| 16 |
|
|
|
| 17 |
|
|
Mageia iso tools |
| 18 |
|
|
|
| 19 |
|
|
=head1 SYNOPSYS |
| 20 |
|
|
|
| 21 |
|
|
require MGATools::iso; |
| 22 |
|
|
|
| 23 |
|
|
=head1 DESCRIPTION |
| 24 |
|
|
|
| 25 |
|
|
<MGATools::iso> includes Mageia iso tools. |
| 26 |
|
|
|
| 27 |
|
|
=head1 SEE ALSO |
| 28 |
|
|
|
| 29 |
|
|
mkcd |
| 30 |
|
|
|
| 31 |
|
|
=head1 COPYRIGHT |
| 32 |
|
|
|
| 33 |
|
|
Copyright (C) 2000,2001,2002,2003,2004 Mandriva <warly@mandriva.com> |
| 34 |
|
|
|
| 35 |
|
|
This program is free software; you can redistribute it and/or modify |
| 36 |
|
|
it under the terms of the GNU General Public License as published by |
| 37 |
|
|
the Free Software Foundation; either version 2, or (at your option) |
| 38 |
|
|
any later version. |
| 39 |
|
|
|
| 40 |
|
|
This program is distributed in the hope that it will be useful, |
| 41 |
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 42 |
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 43 |
|
|
GNU General Public License for more details. |
| 44 |
|
|
|
| 45 |
|
|
You should have received a copy of the GNU General Public License |
| 46 |
|
|
along with this program; if not, write to the Free Software |
| 47 |
|
|
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 48 |
|
|
|
| 49 |
|
|
=head1 CREDITS |
| 50 |
|
|
|
| 51 |
|
|
md5 code highly inspired from Redhat anaconda md5 in ISO code |
| 52 |
|
|
|
| 53 |
|
|
=cut |
| 54 |
|
|
|
| 55 |
|
|
|
| 56 |
|
|
# function copied from Mkcd::Tools |
| 57 |
|
|
# TODO must add some check of maximum authorized size |
| 58 |
|
|
sub include_md5 { |
| 59 |
|
|
my ($iso, $write, $verbose) = @_; |
| 60 |
|
|
my $ISO; |
| 61 |
|
|
if ($write) { |
| 62 |
|
|
open $ISO, "+<$iso" or return "ERROR include_md5: unable to open $iso ($!)\n"; |
| 63 |
|
|
} else { |
| 64 |
|
|
open $ISO, $iso or return "ERROR include_md5: unable to open $iso ($!)\n"; |
| 65 |
|
|
} |
| 66 |
|
|
binmode $ISO; |
| 67 |
|
|
my $offset = 16*2048; |
| 68 |
|
|
# blank header |
| 69 |
|
|
seek $ISO, $offset, 0; |
| 70 |
|
|
my ($buf, $msg); |
| 71 |
|
|
while (1) { |
| 72 |
|
|
read $ISO,$buf,2048; |
| 73 |
|
|
my $c = ord $buf; |
| 74 |
|
|
last if $c == 1; |
| 75 |
|
|
return "ERROR include_md5: could not find primary volume descriptor\n" if $c == 255; |
| 76 |
|
|
$offset += 2048 |
| 77 |
|
|
} |
| 78 |
|
|
my $size = ((ord substr $buf, $SIZE_OFFSET, 1) * 0x1000000 + |
| 79 |
|
|
(ord substr $buf, $SIZE_OFFSET + 1, 1) * 0x10000 + |
| 80 |
|
|
(ord substr $buf, $SIZE_OFFSET + 2, 1) * 0x100 + |
| 81 |
|
|
(ord substr $buf, $SIZE_OFFSET + 3, 1)) * 2048; |
| 82 |
|
|
my ($system, $volume, $publisher, $prep, $app) = map { $a = $_ ; $a =~ s/^\s*//; $a =~ s/\s*$//; $a } (substr($buf, 8, 22), substr($buf, 30, 40), substr($buf, 318, 128), substr($buf, 446, 32), substr($buf, 574, 128)); |
| 83 |
|
|
print "include_md5:\nSystem: \t$system\nVolume: \t$volume\nPublisher: \t$publisher\nData preparer: \t$prep\nApplication: \t$app\nISO size: \t$size\n" if $verbose; |
| 84 |
|
|
seek $ISO, $offset + $INFO_OFFSET, 0; |
| 85 |
|
|
read $ISO, $buf,512; |
| 86 |
|
|
my ($md5sum) = $buf =~ /.md5 = (\S+)/; |
| 87 |
|
|
$msg .= "include_md5: previous data $buf\n"; |
| 88 |
|
|
seek $ISO, 0, 0; |
| 89 |
|
|
my $md5 = new Digest::MD5; |
| 90 |
|
|
my $read = read $ISO, $buf, $offset + $INFO_OFFSET; |
| 91 |
|
|
$md5->add($buf); |
| 92 |
|
|
seek $ISO, 512, 1; |
| 93 |
|
|
$read += 512; |
| 94 |
|
|
$|=1; |
| 95 |
|
|
my $val = int $size/2048/100; |
| 96 |
|
|
$verbose and print "\rReading: 0 %"; |
| 97 |
|
|
my ($i, $j); |
| 98 |
|
|
# skip last $SKIP bytes that sometimes are not correctly burned by some drives |
| 99 |
|
|
my $n = 1; |
| 100 |
|
|
while ($n && $read < $size - $SKIP * 2048) { |
| 101 |
|
|
$n = read $ISO, $buf,2048; |
| 102 |
|
|
print "\rReading: ", $j++, " %" if ($verbose && !($i++ % $val)); |
| 103 |
|
|
$md5->add($buf); |
| 104 |
|
|
$read += $n; |
| 105 |
|
|
} |
| 106 |
|
|
print "\n"; |
| 107 |
|
|
my $digest = $md5->hexdigest; |
| 108 |
|
|
$msg .= "include_md5: computed md5 $digest\n"; |
| 109 |
|
|
my $res = $md5sum eq $digest; |
| 110 |
|
|
if ($md5sum) { |
| 111 |
|
|
$msg .= "include_md5: previous md5 $md5sum\ninclude_md5: md5sum check "; |
| 112 |
|
|
$msg .= $res ? "OK\n" : "FAILED\n" |
| 113 |
|
|
} |
| 114 |
|
|
print $msg if $verbose; |
| 115 |
|
|
$write or return $res; |
| 116 |
|
|
seek $ISO, $offset + $INFO_OFFSET, 0; |
| 117 |
|
|
my $str = substr "$volume.md5 = $digest", 0, 512; |
| 118 |
|
|
my $l = length $str; |
| 119 |
|
|
print $ISO ($l > 512 ? substr $str, -1, 512 : $str . ' ' x (512 - $l)); |
| 120 |
|
|
close $ISO |
| 121 |
|
|
} |
| 122 |
|
|
|
| 123 |
|
|
1 |
| 124 |
|
|
|
Parent Directory
| 
Revision Log