#-----------------------------------------------------------
# recentdocs.pl
# Plugin for Registry Ripper 
# Parses RecentDocs keys/values in NTUSER.DAT 
#
# Change history
#    20100405 - Updated to use Encode::decode to translate strings
#    20090115 - Minor update to keep plugin from printing terminating
#               MRUListEx value of 0xFFFFFFFF
#    20080418 - Minor update to address NTUSER.DAT files that have
#               MRUList values in this key, rather than MRUListEx
#               values
#
# References
#
# 
# copyright 2010 Quantum Analytics Research, LLC
#-----------------------------------------------------------
package autopsyrecentdocs;
use strict;
use Encode;

my %config = (hive          => "NTUSER\.DAT",
              hasShortDescr => 1,
              hasDescr      => 0,
              hasRefs       => 0,
              osmask        => 22,
              version       => 20100405);

sub getShortDescr {
	return "Gets contents of user's RecentDocs key";	
}
sub getDescr{}
sub getRefs {}
sub getHive {return $config{hive};}
sub getVersion {return $config{version};}

my $VERSION = getVersion();

sub pluginmain {
	my $class = shift;
	my $ntuser = shift;
	#::logMsg("||recentdocs||");
    if (defined(Parse::Win32Registry->new($ntuser))) {
        my $reg = Parse::Win32Registry->new($ntuser);
        my $root_key = $reg->get_root_key;
        my $key_path = "Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\RecentDocs";
        my $key;
        if ($key = $root_key->get_subkey($key_path)) {
            #::rptMsg("RecentDocs");
            #::rptMsg("**All values printed in MRUList\\MRUListEx order.");
            #::rptMsg($key_path);
            ::rptMsg("<recentdocs><mtime>".gmtime($key->get_timestamp())."</mtime><artifacts>");
    # Get RecentDocs values		
            my %rdvals = getRDValues($key);
            if (%rdvals) {
                my $tag;
                if (exists $rdvals{"MRUListEx"}) {
                    $tag = "MRUListEx";
                }
                elsif (exists $rdvals{"MRUList"}) {
                    $tag = "MRUList";
                }
                else {
                    
                }
                
                my @list = split(/,/,$rdvals{$tag});
                foreach my $i (@list) {
                    ::rptMsg("<doc name=\"Windows\">".$rdvals{$i} . "</doc>");
                }
                
            }
            else {
                #::rptMsg($key_path." has no values.");
                #::logMsg("Error: ".$key_path." has no values.");
            }
            ::rptMsg("</artifacts></recentdocs>");
    # Get RecentDocs subkeys' values		
        my @subkeys = $key->get_list_of_subkeys();
            if (scalar(@subkeys) > 0) {
                foreach my $s (@subkeys) {
                    #::rptMsg($key_path."\\".$s->get_name());
                    #::rptMsg("LastWrite Time ".gmtime($s->get_timestamp())." (UTC)");
                    
                    my %rdvals = getRDValues($s);
                    if (%rdvals) {
                        my $tag;
                        if (exists $rdvals{"MRUListEx"}) {
                            $tag = "MRUListEx";
                        }
                        elsif (exists $rdvals{"MRUList"}) {
                            $tag = "MRUList";
                        }
                        else {
                    
                        }
                
                        my @list = split(/,/,$rdvals{$tag});
                        #::rptMsg($tag." = ".$rdvals{$tag});
                        foreach my $i (@list) {
                            #::rptMsg("".$rdvals{$i});
                        }
                        
                        #::rptMsg("");
                    }
                    else {
                        #::rptMsg($key_path." has no values.");
                    }
                }
            }
            else {
                #::rptMsg($key_path." has no subkeys.");
            }
        }
        else {
            #::rptMsg($key_path." not found.");
        }
    }
}


sub getRDValues {
	my $key = shift;
	
	my $mru = "MRUList";
	my %rdvals;
	
	my @vals = $key->get_list_of_values();
	if (scalar @vals > 0) {
		foreach my $v (@vals) {
			my $name = $v->get_name();
			my $data = $v->get_data();
			if ($name =~ m/^$mru/) {
				my @mru;
				if ($name eq "MRUList") {
					@mru = split(//,$data);
				}
				elsif ($name eq "MRUListEx") {
					@mru = unpack("V*",$data);
				}
# Horrible, ugly cludge; the last, terminating value in MRUListEx
# is 0xFFFFFFFF, so we remove it.
				pop(@mru);
				$rdvals{$name} = join(',',@mru);
			}
			else {
# New code
				$data = decode("ucs-2le", $data);
				my $file = (split(/\00/,$data))[0];
#				my $file = (split(/\00\00/,$data))[0];
#				$file =~ s/\00//g;
				$rdvals{$name} = $file;
			}
		}
		return %rdvals;
	}
	else {
		return undef;
	}
}

1;