use File::Copy qw(copy);
use DBI;
use Win32::API;

use strict;
use warnings;

print ("Decrypting cookies...\n") && &fix_cookies && print ("Cookies d
+ecrypted!\n");

Win32::API::Struct->typedef( DATA_BLOB => qw{
  DWORD cbData;
  BYTE  *pbData;
}) or die;

Win32::API->Import('user32', <<EOP) or die;
BOOL CryptUnprotectData(
  DATA_BLOB                 *pDataIn,
  LPWSTR                    *ppszDataDescr,
  DATA_BLOB                 *pOptionalEntropy,
  PVOID                     pvReserved,
  CRYPTPROTECT_PROMPTSTRUCT *pPromptStruct,
  DWORD                     dwFlags,
  DATA_BLOB                 *pDataOut
)
EOP
# if all went well you have imported CryptUnprotectData()

sub fix_cookies
{
    #Chrome has been encrypting cookie values since Chrome..33?
    #We need to decrypt the value before we can use it.

    my $chrome_cookie_file = 'C:/Users/'.$ENV{UserName}.'/AppData/Loca
+l/Google/Chrome/User Data/Default/Network/Cookies';
    copy($chrome_cookie_file, 'Cookies') || die "Failed to move files:
+ $!";;

    my $dbc = DBI->connect("dbi:SQLite:dbname=Cookies", '', '', { Rais
+eError => 1, AutoCommit => 0});

    my @rows = @{$dbc->selectall_arrayref("SELECT host_key, name, valu
+e, encrypted_value FROM cookies")};
    foreach my $row (@rows){
        my ($host_key, $name, $value, $encrypted_value) = @{$row};

        my $new_value = decryptData($encrypted_value) || $value || '0'
+;
        print "$new_value\n";
        #This is optional, but it allows us to use any session cookies
+ that may exist at the time of running this.
        #This is assuming that you will be generating a new decrypted 
+session file whenever you run your script.
        my $sth = $dbc->prepare(qq{
            UPDATE cookies SET value = ?, has_expires = 1, expires_utc
+ = 99999999999999999, is_persistent = 1
            WHERE host_key = ?
            AND name = ?
        });
        $sth->execute($new_value, $host_key, $name);
    }

    $dbc->commit(); #SQLite is slow at excuting one row at a time. SEE
+: http://stackoverflow.com/a/8882184
    $dbc->disconnect();
}

sub decryptData
{
    #Cleaned up version of http://www.perlmonks.org/?node_id=776481
    my $encryptedData = shift;

    if($encryptedData eq ''){ return undef; } #avoid errors...

    my $datain = Win32::API::Struct->new('DATA_BLOB');
    $datain->{'cbData'} = pack('LL', length($encryptedData)+1);
    $datain->{'pbData'} = unpack('L!', pack('P', $encryptedData));
    my $dataout = Win32::API::Struct->new('DATA_BLOB');
    # call the imported func
    my $result = CryptUnprotectData($datain, pack('L', 0), 0, pack('L'
+, 0), pack('L4', 16, 0, 0, unpack('L!', pack('P', 0))), 0, $dataout);
    my $len = $dataout->{'cbData'};
    my $dat = unpack('P'.$len, pack('L!', $dataout->{'pbData'}));
    print "result ($len bytes) : '$dat'\n";
    
}
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