version 1.1, 2006/01/26 20:54:19 |
version 1.20, 2007/01/31 04:29:08 |
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# Palm::Keyring.pm |
package Palm::Keyring; |
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# $RedRiver: Keyring.pm,v 1.19 2007/01/31 04:17:15 andrew Exp $ |
# |
# |
# Perl class for dealing with Keyring for Palm OS databases. |
# Perl class for dealing with Keyring for Palm OS databases. |
# |
# |
# Copyright (C) 2004, Andrew Fresh |
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# You may distribute this file under the terms of the Artistic |
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# License, as specified in the README file distributed with the p5-Palm distribution. |
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# |
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# This started as Memo.pm, I just made it work for Keyring. |
# This started as Memo.pm, I just made it work for Keyring. |
# |
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# $Id$ |
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# $RedRiver$ |
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use strict; |
use strict; |
package Palm::Keyring; |
use warnings; |
use Palm::Raw(); |
use Carp; |
use Palm::StdAppInfo(); |
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use vars qw( $VERSION @ISA ); |
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use base qw/ Palm::StdAppInfo /; |
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use Digest::MD5 qw(md5); |
use Digest::MD5 qw(md5); |
use Crypt::TripleDES; |
use Crypt::DES; |
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use Readonly; |
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use constant ENCRYPT => 1; |
Readonly my $ENCRYPT => 1; |
use constant DECRYPT => 0; |
Readonly my $DECRYPT => 0; |
use constant MD5_CBLOCK => 64; |
Readonly my $MD5_CBLOCK => 64; |
my $kSaltSize = 4; |
Readonly my $kSalt_Size => 4; |
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Readonly my $EMPTY => q{}; |
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Readonly my $SPACE => q{ }; |
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Readonly my $NULL => chr 0; |
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# One liner, to allow MakeMaker to work. |
# One liner, to allow MakeMaker to work. |
$VERSION = do { my @r = (q$Revision$ =~ /\d+/g); sprintf "%d."."%02d" x $#r, @r }; |
our $VERSION = 0.92; |
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@ISA = qw( Palm::StdAppInfo Palm::Raw ); |
sub new { |
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my $classname = shift; |
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my $pass = shift; |
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=head1 NAME |
# Create a generic PDB. No need to rebless it, though. |
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my $self = $classname->SUPER::new(@_); |
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Palm::Keyring - Handler for Palm Keyring databases. |
$self->{'name'} = 'Keys-Gtkr'; # Default |
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$self->{'creator'} = 'Gtkr'; |
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$self->{'type'} = 'Gkyr'; |
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=head1 SYNOPSIS |
# The PDB is not a resource database by |
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# default, but it's worth emphasizing, |
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# since MemoDB is explicitly not a PRC. |
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$self->{'attributes'}{'resource'} = 0; |
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use Palm::Keyring; |
# Initialize the AppInfo block |
$pdb->Decrypt('mypassword'); |
$self->{'appinfo'} = {}; |
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=head1 DESCRIPTION |
# Add the standard AppInfo block stuff |
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Palm::StdAppInfo::seed_StdAppInfo( $self->{'appinfo'} ); |
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The Keyring PDB handler is a helper class for the Palm::PDB package. It |
# Set the version |
parses Keyring databases. See |
$self->{'version'} = 4; |
L<http://gnukeyring.sourceforge.net/>. |
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It is just the standard Palm::Raw with 2 additional public methods. Decrypt and Encrypt. |
if ( defined $pass ) { |
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$self->Password($pass); |
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} |
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=cut |
return $self; |
=head2 new |
} |
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$pdb = new Palm::Keyring ('password'); |
sub import { |
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Palm::PDB::RegisterPDBHandlers( __PACKAGE__, [ 'Gtkr', 'Gkyr' ], ); |
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return 1; |
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} |
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Create a new PDB, initialized with the various Palm::Keyring fields |
sub ParseRecord { |
and an empty record list. |
my $self = shift; |
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Use this method if you're creating a Keyring PDB from scratch. |
my $rec = $self->SUPER::ParseRecord(@_); |
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=cut |
# skip the 0 record that holds the password |
#' |
return $rec if ! exists $self->{'records'}; |
sub new |
return $rec if ! exists $rec->{'data'}; |
{ |
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my $classname = shift; |
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my $pass = shift; |
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my $self = $classname->SUPER::new(@_); |
my ( $name, $encrypted ) = split /$NULL/xm, $rec->{'data'}, 2; |
# Create a generic PDB. No need to rebless it, |
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# though. |
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$self->{name} = "Keys-Gtkr"; # Default |
return $rec if ! $encrypted; |
$self->{creator} = "Gtkr"; |
delete $rec->{'data'}; |
$self->{type} = "Gkyr"; |
$rec->{'name'} = $name; |
$self->{attributes}{resource} = 0; |
$rec->{'encrypted'} = $encrypted; |
# The PDB is not a resource database by |
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# default, but it's worth emphasizing, |
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# since MemoDB is explicitly not a PRC. |
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# Initialize the AppInfo block |
return $rec; |
$self->{appinfo} = {}; |
} |
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# Add the standard AppInfo block stuff |
sub PackRecord { |
&Palm::StdAppInfo::seed_StdAppInfo($self->{appinfo}); |
my $self = shift; |
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my $rec = shift; |
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# Set the version |
my $rec0_id = $self->{'records'}->[0]->{'id'}; |
$self->{version} = 4; |
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# Give the PDB the first record that will hold the encrypted password |
if ($rec->{'encrypted'} && ! $rec->{'id'} == $rec0_id) { |
$self->{records} = [ |
$rec->{'data'} = join $NULL, $rec->{'name'}, $rec->{'encrypted'}; |
{ |
delete $rec->{'name'}; |
'category' => 0, |
delete $rec->{'encrypted'}; |
'attributes' => { |
} |
'private' => 1, |
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'Secret' => 1, |
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'Dirty' => 1, |
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'dirty' => 1 |
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}, |
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}, |
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]; |
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if ($pass) { |
return $self->SUPER::PackRecord($rec, @_); |
$self->Encrypt($pass); |
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} |
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return $self; |
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} |
} |
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sub import |
sub Encrypt { |
{ |
my $self = shift; |
&Palm::PDB::RegisterPDBHandlers(__PACKAGE__, |
my $rec = shift; |
[ "Gtkr", "Gkyr" ], |
my $data = shift; |
); |
my $pass = shift || $self->{'password'}; |
} |
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sub Encrypt |
if ( ! $pass) { |
{ |
croak("'password' not set!\n"); |
my $self = shift; |
} |
my $pass = shift; |
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if ($pass) { |
if ( ! $rec) { |
unless ($self->_keyring_verify($pass) ) { |
croak("Needed parameter 'record' not passed!\n"); |
# This would encrypt with a new password. |
} |
# First decrypting everything with the old password of course. |
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$self->_keyring_update($pass) || return undef; |
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$self->_keyring_verify($pass) || return undef; |
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} |
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} |
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my $seen_enc_pass = 0; |
if ( ! $data) { |
foreach my $record (@{ $self->{records} }) { |
croak("Needed parameter 'data' not passed!\n"); |
unless ($seen_enc_pass) { |
} |
$seen_enc_pass = 1; |
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next; |
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} |
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next unless defined $record->{plaintext}; |
if ( ! $self->Password($pass)) { |
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croak("Incorrect Password!\n"); |
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} |
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my $name = defined $record->{plaintext}->{name} ? $record->{plaintext}->{name} : ''; |
$self->{'digest'} ||= _calc_keys( $pass ); |
my $account = defined $record->{plaintext}->{account} ? $record->{plaintext}->{account} : ''; |
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my $password = defined $record->{plaintext}->{password} ? $record->{plaintext}->{password} : ''; |
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my $description = defined $record->{plaintext}->{description} ? $record->{plaintext}->{description} : ''; |
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my $extra = ''; |
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my $plaintext = join("\0", $account, $password, $description, $extra); |
$data->{'account'} ||= $EMPTY; |
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$data->{'password'} ||= $EMPTY; |
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$data->{'notes'} ||= $EMPTY; |
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my $encrypted = $self->_crypt($plaintext, ENCRYPT); |
my %Modified; |
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my ($day, $month, $year) = (localtime)[3,4,5]; |
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$year -= 4; |
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$month++; |
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$record->{data} = join("\0", $name, $encrypted); |
my $p = $day | ($month << 5) | ($year << 9); |
} |
my $packeddate = pack 'n', $p; |
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return 1; |
my $plaintext = join $NULL, |
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$data->{'account'}, $data->{'password'}, $data->{'notes'}, $packeddate; |
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my $encrypted = _crypt3des( $plaintext, $self->{'digest'}, $ENCRYPT ); |
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return if ! $encrypted; |
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$rec->{'attributes'}{'Dirty'} = 1; |
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$rec->{'attributes'}{'dirty'} = 1; |
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$rec->{'name'} ||= $data->{'name'}; |
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$rec->{'encrypted'} = $encrypted; |
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return 1; |
} |
} |
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sub Decrypt |
sub Decrypt { |
{ |
my $self = shift; |
my $self = shift; |
my $rec = shift; |
my $pass = shift; |
my $pass = shift || $self->{'password'}; |
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if ($pass) { |
if ( ! $pass) { |
$self->_keyring_verify($pass) || return undef; |
croak("'password' not set!\n"); |
} |
} |
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my $seen_enc_pass = 0; |
if ( ! $rec) { |
foreach my $record (@{ $self->{records} }) { |
croak("Needed parameter 'record' not passed!\n"); |
unless ($seen_enc_pass) { |
} |
# need to skip the first record because it is the encrypted password |
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$seen_enc_pass = 1; |
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next; |
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} |
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next unless defined $record->{data}; |
if ( ! $self->Password($pass)) { |
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croak("Invalid Password!\n"); |
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} |
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my ($name, $encrypted) = split /\0/, $record->{data}; |
if ( ! $rec->{'encrypted'} ) { |
$record->{plaintext}->{name} = $name; |
croak("No encrypted content!"); |
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} |
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my $decrypted = $self->_crypt($encrypted, DECRYPT); |
$self->{'digest'} ||= _calc_keys( $pass ); |
my ($account, $password, $description, $extra) |
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= split /\0/, $decrypted, 4; |
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$record->{plaintext}->{account} = defined $account ? $account : ''; |
my $decrypted = |
$record->{plaintext}->{password} = defined $password ? $password : ''; |
_crypt3des( $rec->{'encrypted'}, $self->{'digest'}, $DECRYPT ); |
$record->{plaintext}->{description} = defined $description ? $description : ''; |
my ( $account, $password, $notes, $packeddate ) = split /$NULL/xm, |
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$decrypted, 4; |
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#print "Extra: $extra\n"; |
my %Modified; |
#-------------------------------------------------- |
if ($packeddate) { |
# print "Account: $account\n"; |
my $u = unpack 'n', $packeddate; |
# print "Password: $password\n"; |
my $year = (($u & 0xFE00) >> 9) + 4; # since 1900 |
# print "Description: $description\n"; |
my $month = (($u & 0x01E0) >> 5) - 1; # 0-11 |
#-------------------------------------------------- |
my $day = (($u & 0x001F) >> 0); # 1-31 |
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} |
%Modified = ( |
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year => $year, |
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month => $month || 0, |
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day => $day || 1, |
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); |
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} |
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return 1; |
return { |
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name => $rec->{'name'}, |
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account => $account, |
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password => $password, |
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notes => $notes, |
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lastchange => \%Modified, |
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}; |
} |
} |
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sub _crypt |
sub Password { |
{ |
my $self = shift; |
my $self = shift; |
my $pass = shift || $self->{'password'}; |
my $original = shift; |
my $new_pass = shift; |
my $flag = shift; |
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my $digest = $self->{digest} || $self->_calc_keys(); |
if (! exists $self->{'records'}) { |
#print "DIGEST: $digest\n"; |
# Give the PDB the first record that will hold the encrypted password |
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$self->{'records'} = [ $self->new_Record ]; |
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my $des = new Crypt::TripleDES; |
return $self->_password_update($pass); |
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} |
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if ($flag == ENCRYPT) { |
if ($new_pass) { |
return $des->encrypt3($original, $digest); |
my @accts = (); |
} else { |
foreach my $i (0..$#{ $self->{'records'} }) { |
return $des->decrypt3($original, $digest); |
if ($i == 0) { |
} |
push @accts, undef; |
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next; |
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} |
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my $acct = $self->Decrypt($self->{'records'}->[$i], $pass); |
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if ( ! $acct ) { |
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croak("Couldn't decrypt $self->{'records'}->[$i]->{'name'}"); |
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} |
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push @accts, $acct; |
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} |
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if ( ! $self->_password_update($new_pass)) { |
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croak("Couldn't set new password!"); |
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} |
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$pass = $new_pass; |
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foreach my $i (0..$#accts) { |
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next if $i == 0; |
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$self->Encrypt($self->{'records'}->[$i], $accts[$i], $pass); |
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} |
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} |
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return $self->_password_verify($pass); |
} |
} |
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sub _calc_keys |
sub _calc_keys { |
{ |
my $pass = shift; |
my $self = shift; |
if (! defined $pass) { croak('No password defined!'); }; |
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my $pass = $self->{'password'}; |
my $digest = md5($pass); |
die "No password defined!" unless defined $pass; |
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my $digest = md5($pass); |
my ( $key1, $key2 ) = unpack 'a8a8', $digest; |
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my ($key1, $key2) = unpack('a8a8', $digest); |
#-------------------------------------------------- |
#-------------------------------------------------- |
# print "key1: $key1: ", length $key1, "\n"; |
# print "key1: $key1: ", length $key1, "\n"; |
# print "key2: $key2: ", length $key2, "\n"; |
# print "key2: $key2: ", length $key2, "\n"; |
#-------------------------------------------------- |
#-------------------------------------------------- |
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$digest = unpack('H*', $key1 . $key2 . $key1); |
$digest = unpack 'H*', $key1 . $key2 . $key1; |
#-------------------------------------------------- |
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# print "Digest: ", $digest, "\n"; |
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# print length $digest, "\n"; |
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#-------------------------------------------------- |
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$self->{digest} = $digest; |
#-------------------------------------------------- |
return $digest; |
# print "Digest: ", $digest, "\n"; |
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# print length $digest, "\n"; |
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#-------------------------------------------------- |
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return $digest; |
} |
} |
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sub _keyring_verify |
sub _password_verify { |
{ |
my $self = shift; |
my $self = shift; |
my $pass = shift; |
my $pass = shift; |
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die "No password specified!" unless defined $pass; |
if (! $pass) { croak('No password specified!'); }; |
$self->{password} = $pass; |
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# AFAIK the thing we use to test the password is |
if (defined $self->{'password'} && $pass eq $self->{'password'}) { |
# always in the first entry |
# already verified this password |
my $data = $self->{records}->[0]->{data}; |
return 1; |
#die "No encrypted password in file!" unless defined $data; |
} |
return undef unless defined $data; |
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$data =~ s/\0$//; |
# AFAIK the thing we use to test the password is |
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# always in the first entry |
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my $data = $self->{'records'}->[0]->{'data'}; |
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my $salt = substr($data, 0, $kSaltSize); |
#die "No encrypted password in file!" unless defined $data; |
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if ( ! defined $data) { return; }; |
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my $msg = $salt . $pass; |
$data =~ s/$NULL$//xm; |
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$msg .= "\0" x (MD5_CBLOCK - length($msg)); |
my $salt = substr $data, 0, $kSalt_Size; |
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my $digest = md5($msg); |
my $msg = $salt . $pass; |
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if ($data eq $salt . $digest) { |
$msg .= "\0" x ( $MD5_CBLOCK - length $msg ); |
# May as well generate the keys we need now, since we know the password is right |
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if ($self->_calc_keys()) { |
my $digest = md5($msg); |
return 1; |
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} else { |
if ( $data eq $salt . $digest ) { |
return undef; |
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} |
# May as well generate the keys we need now, since we know the password is right |
} else { |
$self->{'digest'} = _calc_keys($pass); |
return undef; |
if ( $self->{'digest'} ) { |
} |
$self->{'password'} = $pass; |
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return 1; |
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} |
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} |
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return; |
} |
} |
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sub _keyring_update |
sub _password_update { |
{ |
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# It is very important to Encrypt after calling this |
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# (Although it is generally only called by Encrypt) |
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# because otherwise the data will be out of sync with the |
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# password, and that would suck! |
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my $self = shift; |
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my $pass = shift; |
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die "No password specified!" unless defined $pass; |
# It is very important to Encrypt after calling this |
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# (Although it is generally only called by Encrypt) |
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# because otherwise the data will be out of sync with the |
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# password, and that would suck! |
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my $self = shift; |
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my $pass = shift; |
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# if the database already has a password in it |
if (! defined $pass) { croak('No password specified!'); }; |
if ($self->{records}->[0]->{data}) { |
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# Make sure everything is decrypted before we update the keyring |
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$self->Decrypt() || return undef; |
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} |
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my $salt; |
my $salt; |
for (1..$kSaltSize) { |
for ( 1 .. $kSalt_Size ) { |
$salt .= chr(int(rand(255))); |
$salt .= chr int rand 255; |
} |
} |
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my $msg = $salt . $pass; |
my $msg = $salt . $pass; |
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$msg .= "\0" x (MD5_CBLOCK - length($msg)); |
$msg .= "\0" x ( $MD5_CBLOCK - length $msg ); |
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my $digest = md5($msg); |
my $digest = md5($msg); |
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my $data = $salt . $digest;# . "\0"; |
my $data = $salt . $digest; # . "\0"; |
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# AFAIK the thing we use to test the password is |
# AFAIK the thing we use to test the password is |
# always in the first entry |
# always in the first entry |
$self->{records}->[0]->{data} = $data; |
$self->{'records'}->[0]->{'data'} = $data; |
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$self->{password} = $pass; |
$self->{'password'} = $pass; |
$self->_calc_keys(); |
$self->{'digest'} = _calc_keys( $self->{'password'} ); |
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return 1; |
return 1; |
} |
} |
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sub _crypt3des { |
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my ( $plaintext, $passphrase, $flag ) = @_; |
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$passphrase .= $SPACE x ( 16 * 3 ); |
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my $cyphertext = $EMPTY; |
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my $size = length $plaintext; |
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#print "STRING: '$plaintext' - Length: " . (length $plaintext) . "\n"; |
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my @C; |
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for ( 0 .. 2 ) { |
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$C[$_] = |
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new Crypt::DES( pack 'H*', ( substr $passphrase, 16 * $_, 16 )); |
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} |
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for ( 0 .. ( ($size) / 8 ) ) { |
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my $pt = substr $plaintext, $_ * 8, 8; |
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#print "PT: '$pt' - Length: " . length($pt) . "\n"; |
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if (! length $pt) { next; }; |
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if ( (length $pt) < 8 ) { |
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if ($flag == $DECRYPT) { croak('record not 8 byte padded'); }; |
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my $len = 8 - (length $pt); |
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#print "LENGTH: $len\n"; |
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#print "Binary: '" . unpack("b*", $pt) . "'\n"; |
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$pt .= ($NULL x $len); |
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#print "PT: '$pt' - Length: " . length($pt) . "\n"; |
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#print "Binary: '" . unpack("b*", $pt) . "'\n"; |
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} |
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if ( $flag == $ENCRYPT ) { |
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$pt = $C[0]->encrypt($pt); |
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$pt = $C[1]->decrypt($pt); |
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$pt = $C[2]->encrypt($pt); |
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} |
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else { |
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$pt = $C[0]->decrypt($pt); |
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$pt = $C[1]->encrypt($pt); |
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$pt = $C[2]->decrypt($pt); |
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} |
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#print "PT: '$pt' - Length: " . length($pt) . "\n"; |
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$cyphertext .= $pt; |
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} |
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$cyphertext =~ s/$NULL+$//xm; |
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#print "CT: '$cyphertext' - Length: " . length($cyphertext) . "\n"; |
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return $cyphertext; |
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} |
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1; |
1; |
__END__ |
__END__ |
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=head1 NAME |
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Palm::Keyring - Handler for Palm Keyring databases. |
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=head1 DESCRIPTION |
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The Keyring PDB handler is a helper class for the Palm::PDB package. It |
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parses Keyring for Palm OS databases. See |
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L<http://gnukeyring.sourceforge.net/>. |
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It has the standard Palm::PDB methods with 2 additional public methods. |
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Decrypt and Encrypt. |
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It currently supports the v4 Keyring databases. The v5 databases from |
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the pre-release keyring-2.0 are not supported. |
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This module doesn't store the decrypted content. It only keeps it until it |
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returns it to you or encrypts it. |
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=head1 SYNOPSIS |
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use Palm::PDB; |
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use Palm::Keyring; |
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my $pass = 'password'; |
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my $file = 'Keys-Gtkr.pdb'; |
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my $pdb = new Palm::PDB; |
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$pdb->Load($file); |
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foreach (0..$#{ $pdb->{'records'} }) { |
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next if $_ = 0; # skip the password record |
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my $rec = $pdb->{'records'}->[$_]; |
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my $acct = $pdb->Decrypt($rec, $pass); |
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print $rec->{'name'}, ' - ', $acct->{'account'}, "\n"; |
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} |
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=head1 SUBROUTINES/METHODS |
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=head2 new |
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$pdb = new Palm::Keyring([$password]); |
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Create a new PDB, initialized with the various Palm::Keyring fields |
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and an empty record list. |
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Use this method if you're creating a Keyring PDB from scratch otherwise you |
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can just use Palm::PDB::new() before calling Load(). |
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=head2 Encrypt |
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$pdb->Encrypt($rec, $acct, [$password]); |
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Encrypts an account into a record, either with the password previously |
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used, or with a password that is passed. |
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$rec is a record from $pdb->{'records'} or a newly generated record. |
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$acct is a hashref in the format below. |
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my $acct = { |
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name => $rec->{'name'}, |
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account => $account, |
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password => $password, |
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notes => $notes, |
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lastchange => { |
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year => 107, # years since 1900 |
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month => 0, # 0-11, 0 = January, 11 = December |
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day => 30, # 1-31, same as l<localtime/> |
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}, |
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}; |
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=head2 Decrypt |
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my $acct = $pdb->Decrypt($rec[, $password]); |
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Decrypts the record and returns a hashref for the account as described |
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under Encrypt(). |
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However, it ignores the "lastchange" field and generates its own. |
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It also only uses the "name" field if there is not already a $rec->{'name'}. |
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foreach (0..$#{ $pdb->{'records'}) { |
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next if $_ == 0; |
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my $rec = $pdb->{'records'}->[$_]; |
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my $acct = $pdb->Decrypt($rec[, $password]); |
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# do something with $acct |
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} |
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=head2 Password |
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$pdb->Password([$password[, $new_password]]); |
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Either sets the password to be used to crypt, or if you pass $new_password, |
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changes the password on the database. |
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If you have created a new $pdb, and you didn't set a password when you |
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called new(), you only need to pass one password and it will set that as |
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the password. |
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If nothing is passed, and there has been a password used before, |
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it just verifies that the password was correct. |
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=head1 DEPENDENCIES |
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Palm::StdAppInfo |
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Digest::MD5 |
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Crypt::DES |
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Readonly |
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=head1 BUGS AND LIMITATIONS |
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Once this module is uploaded, you can |
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Please report any bugs or feature requests to |
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C<bug-palm-keyring at rt.cpan.org>, or through the web interface at |
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L<http://rt.cpan.org>. I will be notified, and then you'll automatically be |
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notified of progress on your bug as I make changes. |
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=head1 AUTHOR |
=head1 AUTHOR |
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Andrew Fresh E<lt>andrew@mad-techies.org<gt> |
Andrew Fresh E<lt>andrew@mad-techies.orgE<gt> |
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=head1 LICENSE AND COPYRIGHT |
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Copyright 2004, 2005, 2006, 2007 Andrew Fresh, All Rights Reserved. |
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This program is free software; you can redistribute it and/or |
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modify it under the same terms as Perl itself. |
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=head1 SEE ALSO |
=head1 SEE ALSO |
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Palm::PDB(3) |
Palm::PDB(3) |
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Palm::StdAppInfo(3) |
Palm::StdAppInfo(3) |
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=cut |
The Keyring for Palm OS website: |
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L<http://gnukeyring.sourceforge.net/> |