version 1.8, 2006/11/10 17:31:38 |
version 1.11, 2007/01/27 23:59:29 |
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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. |
# |
# |
# $Id$ |
# $Id$ |
# $RedRiver: Keyring.pm,v 1.7 2006/11/10 16:45:42 andrew Exp $ |
# $RedRiver: Keyring.pm,v 1.10 2006/12/06 18:45:42 andrew Exp $ |
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use strict; |
use strict; |
package Palm::Keyring; |
package Palm::Keyring; |
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=head1 SYNOPSIS |
=head1 SYNOPSIS |
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use Palm::Keyring; |
use Palm::Keyring; |
$pdb->Decrypt('mypassword'); |
$pdb->Load($file); |
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$pdb->Decrypt($assword); |
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=head1 DESCRIPTION |
=head1 DESCRIPTION |
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The Keyring PDB handler is a helper class for the Palm::PDB package. It |
The Keyring PDB handler is a helper class for the Palm::PDB package. It |
parses Keyring databases. See |
parses Keyring for Palm OS databases. See |
L<http://gnukeyring.sourceforge.net/>. |
L<http://gnukeyring.sourceforge.net/>. |
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It is just the standard Palm::Raw with 2 additional public methods. Decrypt and Encrypt. |
It has the standard Palm::Raw with 2 additional public methods. |
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Decrypt and Encrypt. |
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=cut |
=cut |
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=head2 new |
=head2 new |
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$pdb = new Palm::Keyring ('password'); |
$pdb = new Palm::Keyring($password); |
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Create a new PDB, initialized with the various Palm::Keyring fields |
Create a new PDB, initialized with the various Palm::Keyring fields |
and an empty record list. |
and an empty record list. |
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Use this method if you're creating a Keyring PDB from scratch. |
Use this method if you're creating a Keyring PDB from scratch. |
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=cut |
=cut |
#' |
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sub new |
sub new |
{ |
{ |
my $classname = shift; |
my $classname = shift; |
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$self->{version} = 4; |
$self->{version} = 4; |
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# Give the PDB the first record that will hold the encrypted password |
# Give the PDB the first record that will hold the encrypted password |
$self->{records} = [ { |
$self->{records} = [ $self->new_Record ]; |
'category' => 0, |
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'attributes' => { |
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'private' => 1, |
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'Secret' => 1, |
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'Dirty' => 1, |
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'dirty' => 1, |
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}, |
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}, ]; |
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if ($pass) { |
if (defined $pass) { |
$self->Encrypt($pass); |
$self->Encrypt($pass); |
} |
} |
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); |
); |
} |
} |
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=pod |
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=head2 Load |
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$pdb->Load($filename[, $password]); |
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Overrides the standard Palm::Raw Load() to add |
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$record->{'plaintext'}->{'name'} and |
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$record->{'encrypted'} fields. |
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$record->{'plaintext'}->{'name'} holds the name of the record, |
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$record->{'encrypted'} is the encrypted information in the PDB. |
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It also takes an additional optional parameter, which is the password to use to |
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decrypt the database. |
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See Decrypt() for the additional fields that are available after decryption. |
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=cut |
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sub Load |
sub Load |
{ |
{ |
my $self = shift; |
my $self = shift; |
$self->SUPER::Load(@_); |
my $filename = shift; |
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my $password = shift; |
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$self->{'appinfo'} = {}; |
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$self->{'records'} = []; |
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$self->SUPER::Load($filename); |
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foreach my $record (@{ $self->{records} }) { |
foreach my $record (@{ $self->{records} }) { |
next unless exists $record->{data}; |
next unless exists $record->{data}; |
my ($name, $encrypted) = split /\000/, $record->{data}, 2; |
my ($name, $encrypted) = split /\000/, $record->{data}, 2; |
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$record->{plaintext}->{name} = $name; |
$record->{plaintext}->{name} = $name; |
$record->{encrypted} = $encrypted; |
$record->{encrypted} = $encrypted; |
} |
} |
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return $self->Decrypt($password) if defined $password; |
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1; |
1; |
} |
} |
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=pod |
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=head2 Write |
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$pdb->Write($filename[, $password]); |
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Just like the Palm::Raw::Write() but encrypts everything before saving. |
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Also takes an optional password to encrypt with a new password, not needed |
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unless you are changing the password. |
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=cut |
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sub Write |
sub Write |
{ |
{ |
my $self = shift; |
my $self = shift; |
$self->Encrypt() || return undef; |
my $filename = shift; |
return $self->SUPER::Load(@_); |
my $password = shift; |
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$self->Encrypt($password) || return undef; |
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return $self->SUPER::Write($filename); |
} |
} |
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=pod |
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=head2 Encrypt |
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$pdb->Encrypt([$password]); |
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Encrypts the PDB, either with the password used to decrypt or create it, or |
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optionally with a password that is passed. |
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See Decrypt() for an what plaintext fields are available to be encrypted. |
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=cut |
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sub Encrypt |
sub Encrypt |
{ |
{ |
my $self = shift; |
my $self = shift; |
my $pass = shift; |
my $pass = shift; |
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if ($pass) { |
if ($pass) { |
unless ($self->_keyring_verify($pass) ) { |
unless (exists $self->{'records'}->[0]->{'data'} && |
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$self->_keyring_verify($pass) ) { |
# This would encrypt with a new password. |
# This would encrypt with a new password. |
# First decrypting everything with the old password of course. |
# First decrypting everything with the old password of course. |
$self->_keyring_update($pass) || return undef; |
$self->_keyring_update($pass) || return undef; |
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$record->{data} = join("\000", $name, $encrypted); |
$record->{data} = join("\000", $name, $encrypted); |
} |
} |
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return 1; |
1; |
} |
} |
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=head2 Decrypt |
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$pdb->Decrypt([$password]); |
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Decrypts the PDB and fills out the rest of the fields available in |
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$record->{'plaintext'}. |
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The plaintext should now be this, before encryption or after decryption: |
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$record->{'plaintext'} = { |
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name => $name, |
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account => $account, |
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password => $account_password, |
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description => $description, |
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}; |
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=cut |
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sub Decrypt |
sub Decrypt |
{ |
{ |
my $self = shift; |
my $self = shift; |
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} |
} |
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return 1; |
1; |
} |
} |
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sub _calc_keys |
sub _calc_keys |
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my $pass = shift; |
my $pass = shift; |
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die "No password specified!" unless $pass; |
die "No password specified!" unless $pass; |
$self->{password} = $pass; |
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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 |
my $data = $self->{records}->[1]->{data}; |
my $data = $self->{records}->[0]->{data}; |
#die "No encrypted password in file!" unless defined $data; |
#die "No encrypted password in file!" unless defined $data; |
return undef unless defined $data; |
return undef unless defined $data; |
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if ($data eq $salt . $digest) { |
if ($data eq $salt . $digest) { |
# May as well generate the keys we need now, since we know the password is right |
# May as well generate the keys we need now, since we know the password is right |
$self->{digest} = _calc_keys($self->{password}); |
$self->{digest} = _calc_keys($pass); |
if ($self->{digest}) { |
if ($self->{digest}) { |
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$self->{password} = $pass; |
return 1; |
return 1; |
} else { |
} else { |
return undef; |
return undef; |
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die "No password specified!" unless $pass; |
die "No password specified!" unless $pass; |
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# if the database already has a password in it |
# if the database already has a password in it |
if ($self->{records}->[1]->{data}) { |
if ($self->{records}->[0]->{data}) { |
# Make sure everything is decrypted before we update the keyring |
# Make sure everything is decrypted before we update the keyring |
$self->Decrypt() || return undef; |
$self->Decrypt() || return undef; |
} |
} |
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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}->[1]->{data} = $data; |
$self->{records}->[0]->{data} = $data; |
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$self->{password} = $pass; |
$self->{password} = $pass; |
$self->{digest} = _calc_keys($self->{password}); |
$self->{digest} = _calc_keys($self->{password}); |
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return 1; |
return 1; |
} |
} |
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# XXX It looks like they are using des_ecb2_encrypt so I dunno if that is different |
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sub _crypt3des { |
sub _crypt3des { |
my ( $plaintext, $passphrase, $flag ) = @_; |
my ( $plaintext, $passphrase, $flag ) = @_; |
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my $NULL = chr(0); |
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$passphrase .= ' ' x (16*3); |
$passphrase .= ' ' x (16*3); |
my $cyphertext = ""; |
my $cyphertext = ""; |
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$C[$_] = new Crypt::DES( pack( "H*", substr($passphrase, 16*$_, 16 ))); |
$C[$_] = new Crypt::DES( pack( "H*", substr($passphrase, 16*$_, 16 ))); |
} |
} |
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for ( 0 .. (($size)/8) - 1) { |
for ( 0 .. (($size)/8)) { |
my $pt = substr( $plaintext, $_*8, 8 ); |
my $pt = substr( $plaintext, $_*8, 8 ); |
#print "PT: '$pt' - Length: " . length($pt) . "\n"; |
#print "PT: '$pt' - Length: " . length($pt) . "\n"; |
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next unless length($pt); |
if (length($pt) < 8) { |
if (length($pt) < 8) { |
die "record not 8 byte padded" if $flag == DECRYPT; |
die "record not 8 byte padded" if $flag == DECRYPT; |
my $len = 8 - length($pt); |
my $len = 8 - length($pt); |
#print "LENGTH: $len\n"; |
#print "LENGTH: $len\n"; |
#print "Binary: '" . unpack("b*", $pt) . "'\n"; |
#print "Binary: '" . unpack("b*", $pt) . "'\n"; |
$pt .= (chr(0) x $len);# . $pt; |
$pt .= ($NULL x $len); |
#print "Binary: '" . unpack("b*", $pt) . "'\n"; |
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#print "PT: '$pt' - Length: " . length($pt) . "\n"; |
#print "PT: '$pt' - Length: " . length($pt) . "\n"; |
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#print "Binary: '" . unpack("b*", $pt) . "'\n"; |
} |
} |
$pt = $C[0]->decrypt( $pt ); |
if ($flag == ENCRYPT) { |
$pt = $C[1]->encrypt( $pt ); |
$pt = $C[0]->encrypt( $pt ); |
$pt = $C[2]->decrypt( $pt ); |
$pt = $C[1]->decrypt( $pt ); |
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$pt = $C[2]->encrypt( $pt ); |
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} else { |
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$pt = $C[0]->decrypt( $pt ); |
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$pt = $C[1]->encrypt( $pt ); |
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$pt = $C[2]->decrypt( $pt ); |
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} |
#print "PT: '$pt' - Length: " . length($pt) . "\n"; |
#print "PT: '$pt' - Length: " . length($pt) . "\n"; |
$cyphertext .= $pt; |
$cyphertext .= $pt; |
} |
} |
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return substr ( $cyphertext, 0, $size ); |
$cyphertext =~ s/$NULL+$//; |
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#print "CT: '$cyphertext' - Length: " . length($cyphertext) . "\n"; |
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return $cyphertext; |
} |
} |
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1; |
1; |
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Palm::PDB(3) |
Palm::PDB(3) |
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Palm::StdAppInfo(3) |
Palm::StdAppInfo(3) |
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The Keyring for Palm OS website: |
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L<http://gnukeyring.sourceforge.net/> |
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=cut |
=cut |