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Diff for /palm/Palm-Keyring/lib/Palm/Keyring.pm between version 1.15 and 1.58

version 1.15, 2007/01/29 02:49:41 version 1.58, 2008/09/19 03:50:05
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 package Palm::Keyring;  package Palm::Keyring;
   # $RedRiver: Keyring.pm,v 1.57 2008/09/19 02:04:34 andrew Exp $
 # $RedRiver: Keyring.pm,v 1.14 2007/01/28 22:24:17 andrew Exp $  ########################################################################
   # Keyring.pm *** Perl class for Keyring for Palm OS databases.
 #  #
 # Perl class for dealing with Keyring for Palm OS databases.  
 #  
 #   This started as Memo.pm, I just made it work for Keyring.  #   This started as Memo.pm, I just made it work for Keyring.
   #
   # 2006.01.26 #*#*# andrew fresh <andrew@cpan.org>
   ########################################################################
   # Copyright (C) 2006, 2007 by Andrew Fresh
   #
   # This program is free software; you can redistribute it and/or modify
   # it under the same terms as Perl itself.
   ########################################################################
 use strict;  use strict;
 use warnings;  use warnings;
   
   require 5.006_001;
   
 use Carp;  use Carp;
   
 use base qw/ Palm::StdAppInfo /;  use base qw/ Palm::StdAppInfo /;
   
 use Digest::MD5 qw(md5);  my $ENCRYPT    = 1;
 use Crypt::DES;  my $DECRYPT    = 0;
 use Readonly;  my $MD5_CBLOCK = 64;
   my $kSalt_Size = 4;
   my $EMPTY      = q{};
   my $SPACE      = q{ };
   my $NULL       = chr 0;
   
 Readonly my $ENCRYPT    => 1;  my @CRYPTS = (
 Readonly my $DECRYPT    => 0;      {
 Readonly my $MD5_CBLOCK => 64;          alias     => 'None',
 Readonly my $kSalt_Size => 4;          name      => 'None',
 Readonly my $EMPTY      => q{};          keylen    => 8,
 Readonly my $SPACE      => q{ };          blocksize => 1,
 Readonly my $NULL       => chr 0;          default_iter => 500,
       },
       {
           alias     => 'DES-EDE3',
           name      => 'DES_EDE3',
           keylen    => 24,
           blocksize =>  8,
           DES_odd_parity => 1,
           default_iter => 1000,
       },
       {
           alias     => 'AES128',
           name      => 'Rijndael',
           keylen    => 16,
           blocksize => 16,
           default_iter => 100,
       },
       {
           alias     => 'AES256',
           name      => 'Rijndael',
           keylen    => 32,
           blocksize => 16,
           default_iter => 250,
       },
   );
   
 # One liner, to allow MakeMaker to work.  my %LABELS = (
 our ($VERSION) = q$Revision$ =~ m{ Revision: \s+ (\S+) }xm;      0 => {
           id   => 0,
           name => 'name',
       },
       1 => {
           id   => 1,
           name => 'account',
       },
       2 => {
           id   => 2,
           name => 'password',
       },
       3 => {
           id   => 3,
           name => 'lastchange',
       },
       255 => {
           id   => 255,
           name => 'notes',
       },
   );
   
 #@ISA = qw( Palm::StdAppInfo Palm::Raw );  
   
 sub new {  our $VERSION = '0.96_07';
   
   sub new
   {
     my $classname = shift;      my $classname = shift;
     my $pass      = shift;      my $options = {};
   
       if (@_) {
           # hashref arguments
           if (ref $_[0] eq 'HASH') {
             $options = shift;
           }
   
           # CGI style arguments
           elsif ($_[0] =~ /^-[a-zA-Z0-9_]{1,20}$/) {
             my %tmp = @_;
             while ( my($key,$value) = each %tmp) {
               $key =~ s/^-//;
               $options->{lc $key} = $value;
             }
           }
   
           else {
               $options->{password} = shift;
               $options->{version}  = shift;
               $options->{cipher}   = shift;
           }
       }
   
     # Create a generic PDB. No need to rebless it, though.      # Create a generic PDB. No need to rebless it, though.
     my $self = $classname->SUPER::new(@_);      my $self = $classname->SUPER::new();
   
     $self->{'name'}    = 'Keys-Gtkr';    # Default      $self->{name}    = 'Keys-Gtkr';    # Default
     $self->{'creator'} = 'Gtkr';      $self->{creator} = 'Gtkr';
     $self->{'type'}    = 'Gkyr';      $self->{type}    = 'Gkyr';
   
     # The PDB is not a resource database by      # The PDB is not a resource database by
     # default, but it's worth emphasizing,      # default, but it's worth emphasizing,
     # since MemoDB is explicitly not a PRC.      # since MemoDB is explicitly not a PRC.
     $self->{'attributes'}{'resource'} = 0;      $self->{attributes}{resource} = 0;
   
     # Initialize the AppInfo block      # Set the version
     $self->{'appinfo'} = {};      $self->{version} = $options->{version} || 4;
   
     # Add the standard AppInfo block stuff      # Set options
     Palm::StdAppInfo::seed_StdAppInfo( $self->{'appinfo'} );      $self->{options} = $options;
   
     # Set the version      # Set defaults
     $self->{'version'} = 4;      if ($self->{version} == 5) {
           $self->{options}->{cipher} ||= 0; # 'None'
           my $c = crypts($self->{options}->{cipher})
               or croak('Unknown cipher ' . $self->{options}->{cipher});
           $self->{options}->{iterations} ||= $c->{default_iter};
           $self->{appinfo}->{cipher} ||= $self->{options}->{cipher};
           $self->{appinfo}->{iter}   ||= $self->{options}->{iterations};
       };
   
     # Give the PDB the first record that will hold the encrypted password      if ( defined $options->{file} ) {
     $self->{'records'} = [ $self->new_Record ];          $self->Load($options->{file});
       }
   
     if ( defined $pass ) {      if ( defined $options->{password} ) {
         $self->Encrypt($pass);          $self->Password($options->{password});
     }      }
   
     return $self;      return $self;
 }  }
   
 sub import {  sub import
   {
     Palm::PDB::RegisterPDBHandlers( __PACKAGE__, [ 'Gtkr', 'Gkyr' ], );      Palm::PDB::RegisterPDBHandlers( __PACKAGE__, [ 'Gtkr', 'Gkyr' ], );
     return 1;      return 1;
 }  }
   
 sub Load {  # Accessors
     my $self     = shift;  
     my $filename = shift;  
     my $password = shift;  
   
     $self->{'appinfo'} = {};  sub crypts
     $self->{'records'} = [];  {
     $self->SUPER::Load($filename);      my $crypt = shift;
       if ((! defined $crypt) || (! length $crypt)) {
           return;
       } elsif ($crypt =~ /\D/) {
           foreach my $c (@CRYPTS) {
               if ($c->{alias} eq $crypt) {
                   return $c;
               }
           }
           # didn't find it.
           return;
       } else {
           return $CRYPTS[$crypt];
       }
   }
   
     foreach my $rec ( @{ $self->{'records'} } ) {  sub labels
         if ( ! exists $rec->{'data'}) { next; };  {
         my ( $name, $encrypted ) = split /$NULL/xm, $rec->{'data'}, 2;      my $label = shift;
         if ( ! $encrypted ) { next };  
         $rec->{'plaintext'}->{'name'} = $name;      if ((! defined $label) || (! length $label)) {
         $rec->{'encrypted'} = $encrypted;          return;
       } elsif (exists $LABELS{$label}) {
           return $LABELS{$label};
       } else {
           foreach my $l (keys %LABELS) {
               if ($LABELS{$l}{name} eq $label) {
                   return $LABELS{$l};
               }
           }
   
           # didn't find it, make one.
           if ($label =~ /^\d+$/) {
               return {
                   id => $label,
                   name => undef,
               };
           } else {
               return;
           }
     }      }
   }
   
     return $self->Decrypt($password) if defined $password;  # Write
   
     return 1;  sub Write
   {
       my $self = shift;
   
       if ($self->{version} == 4) {
          # Give the PDB the first record that will hold the encrypted password
           my $rec = $self->new_Record;
           $rec->{data} = $self->{encpassword};
   
           if (ref $self->{records} eq 'ARRAY') {
               unshift @{ $self->{records} }, $rec;
           } else {
               $self->{records} = [ $rec ];
           }
       }
   
       my @rc = $self->SUPER::Write(@_);
   
       if ($self->{version} == 4) {
           shift @{ $self->{records} };
       }
   
       return @rc;
 }  }
   
 sub Write {  # ParseRecord
   
   sub ParseRecord
   {
     my $self     = shift;      my $self     = shift;
     my $filename = shift;  
     my $password = shift;  
   
     $self->Encrypt($password) || return;      my $rec = $self->SUPER::ParseRecord(@_);
     return $self->SUPER::Write($filename);      return $rec if !(defined $rec->{data} && length $rec->{data} );
   
       if ($self->{version} == 4) {
           # skip the first record because it contains the password.
           if (! exists $self->{records}) {
               $self->{encpassword} = $rec->{data};
               return '__DELETE_ME__';
           }
   
           if ($self->{records}->[0] eq '__DELETE_ME__') {
               shift @{ $self->{records} };
           }
   
           my ( $name, $encrypted ) = split /$NULL/xm, $rec->{data}, 2;
   
           return $rec if ! $encrypted;
           $rec->{plaintext}->{0} = {
               label => 'name',
               label_id => 0,
               data  => $name,
               font  => 0,
           };
           $rec->{encrypted} = $encrypted;
           delete $rec->{data};
   
       } elsif ($self->{version} == 5) {
           my $c = crypts( $self->{appinfo}->{cipher} )
               or croak('Unknown cipher ' . $self->{appinfo}->{cipher});
           my $blocksize = $c->{blocksize};
           my ($field, $extra) = _parse_field($rec->{data});
           delete $rec->{data};
   
           $rec->{plaintext}->{0} = $field;
           $rec->{ivec}      = substr $extra, 0, $blocksize;
           $rec->{encrypted} = substr $extra, $blocksize;
   
       } else {
           # XXX Can never get here to test, ParseAppInfoBlock is always run
           # XXX first by Load().
           croak "Unsupported Version $self->{version}";
       }
   
       return $rec;
 }  }
   
 sub Encrypt {  # PackRecord
   
   sub PackRecord
   {
     my $self = shift;      my $self = shift;
     my $pass = shift;      my $rec  = shift;
   
     if ($pass) {      if ($self->{version} == 4) {
         if (          if ($rec->{encrypted}) {
             !( exists $self->{'records'}->[0]->{'data'}              my $name = $rec->{plaintext}->{0}->{data} || $EMPTY;
                 && $self->_keyring_verify($pass) )              $rec->{data} = join $NULL, $name, $rec->{encrypted};
           )          }
         {  
   
             # This would encrypt with a new password.      } elsif ($self->{version} == 5) {
             # First decrypting everything with the old password of course.          croak 'No encrypted data in record' if !defined $rec->{encrypted};
             $self->_keyring_update($pass) || return;          croak 'No ivec!' if !$rec->{ivec};
             $self->_keyring_verify($pass) || return;  
           my $field;
           if ($rec->{plaintext}->{0}) {
               $field = $rec->{plaintext}->{0};
           } else {
               $field = {
                   'label'    => 'name',
                   'label_id' => 0,
                   'data'     => $EMPTY,
                   'font'     => 0,
               };
         }          }
           my $packed = _pack_field($field);
   
           $rec->{data} = join $EMPTY, $packed, $rec->{ivec}, $rec->{encrypted};
   
       } else {
           croak "Unsupported Version $self->{version}";
     }      }
       # XXX Should I?
       delete $rec->{plaintext};
       delete $rec->{encrypted};
   
     $self->{'digest'} ||= _calc_keys( $self->{'password'} );      croak 'No data in record to pack' if !$rec->{data};
   
     foreach my $rec ( @{ $self->{'records'} } ) {      return $self->SUPER::PackRecord($rec, @_);
         if (!defined $rec->{'plaintext'}) { next; };  }
   
         my $name =  # ParseAppInfoBlock
           defined $rec->{'plaintext'}->{'name'}  
           ? $rec->{'plaintext'}->{'name'}  
           : $EMPTY;  
         my $account =  
           defined $rec->{'plaintext'}->{'account'}  
           ? $rec->{'plaintext'}->{'account'}  
           : $EMPTY;  
         my $password =  
           defined $rec->{'plaintext'}->{'password'}  
           ? $rec->{'plaintext'}->{'password'}  
           : $EMPTY;  
         my $description =  
           defined $rec->{'plaintext'}->{'description'}  
           ? $rec->{'plaintext'}->{'description'}  
           : $EMPTY;  
         my $extra = $EMPTY;  
   
         my $plaintext = join "$NULL", $account, $password, $description, $extra;  sub ParseAppInfoBlock
   {
       my $self = shift;
       my $data = shift;
       my $appinfo = {};
   
         my $encrypted = _crypt3des( $plaintext, $self->{'digest'}, $ENCRYPT );      &Palm::StdAppInfo::parse_StdAppInfo($appinfo, $data);
   
         $rec->{'data'} = join "$NULL", $name, $encrypted;      # int8/uint8
       # - Signed or Unsigned Byte (8 bits). C types: char, unsigned char
       # int16/uint16
       # - Signed or Unsigned Word (16 bits). C types: short, unsigned short
       # int32/uint32
       # - Signed or Unsigned Doubleword (32 bits). C types: int, unsigned int
       # sz
       # - Zero-terminated C-style string
   
       if ($self->{version} == 4) {
           # Nothing extra for version 4
   
       } elsif ($self->{version} == 5) {
           _parse_appinfo_v5($appinfo) || return;
   
       } else {
           croak "Unsupported Version $self->{version}";
     }      }
   
     return 1;      return $appinfo;
 }  }
   
 sub Decrypt {  sub _parse_appinfo_v5
   {
       my $appinfo = shift;
   
       if (! exists $appinfo->{other}) {
           # XXX Corrupt appinfo?
           return;
       }
   
       my $unpackstr
           = ("C1" x 8)  # 8 uint8s in an array for the salt
           . ("n1" x 2)  # the iter (uint16) and the cipher (uint16)
           . ("C1" x 8); # and finally 8 more uint8s for the hash
   
       my (@salt, $iter, $cipher, @hash);
       (@salt[0..7], $iter, $cipher, @hash[0..7])
           = unpack $unpackstr, $appinfo->{other};
   
       $appinfo->{salt}           = sprintf "%02x" x 8, @salt;
       $appinfo->{iter}           = $iter;
       $appinfo->{cipher}         = $cipher;
       $appinfo->{masterhash}     = sprintf "%02x" x 8, @hash;
       delete $appinfo->{other};
   
       return $appinfo
   }
   
   # PackAppInfoBlock
   
   sub PackAppInfoBlock
   {
     my $self = shift;      my $self = shift;
     my $pass = shift;      my $retval;
   
     if ($pass) {      if ($self->{version} == 4) {
         $self->_keyring_verify($pass) || return;          # Nothing to do for v4
   
       } elsif ($self->{version} == 5) {
           _pack_appinfo_v5($self->{appinfo});
       } else {
           croak "Unsupported Version $self->{version}";
     }      }
       return &Palm::StdAppInfo::pack_StdAppInfo($self->{appinfo});
   }
   
     $self->{'digest'} ||= _calc_keys( $self->{'password'} );  sub _pack_appinfo_v5
   {
       my $appinfo = shift;
   
     my $reccount = 0;      my $packstr
     foreach my $rec ( @{ $self->{'records'} } ) {          = ("C1" x 8)  # 8 uint8s in an array for the salt
         $reccount++;          . ("n1" x 2)  # the iter (uint16) and the cipher (uint16)
           . ("C1" x 8); # and finally 8 more uint8s for the hash
   
         # always skip the first record that has the password in it.      my @salt = map { hex $_ } $appinfo->{salt} =~ /../gxm;
         next if $reccount <= 1;      my @hash = map { hex $_ } $appinfo->{masterhash} =~ /../gxm;
         if ( ! defined $rec->{'data'} ) {  
             warn 'Invalid record ' . ( $reccount - 1 ) . "\n";      my $packed = pack($packstr,
             next;          @salt,
           $appinfo->{iter},
           $appinfo->{cipher},
           @hash
       );
   
       $appinfo->{other}  = $packed;
   
       return $appinfo
   }
   
   # Encrypt
   
   sub Encrypt
   {
       my $self = shift;
       my $rec  = shift;
       my $pass = shift || $self->{password};
       my $data = shift || $rec->{plaintext};
       my $ivec = shift;
   
       if ( ! $pass && ! $self->{appinfo}->{key}) {
           croak("password not set!\n");
       }
   
       if ( ! $rec) {
           croak("Needed parameter 'record' not passed!\n");
       }
   
       if ( ! $data) {
           croak("Needed 'plaintext' not passed!\n");
       }
   
       if ( $pass && ! $self->Password($pass)) {
           croak("Incorrect Password!\n");
       }
   
       my $acct;
       if ($rec->{encrypted}) {
           $acct = $self->Decrypt($rec, $pass);
       }
   
       my $encrypted;
       if ($self->{version} == 4) {
           $self->{digest} ||= _calc_keys( $pass );
           my $datav4 = {
               name       => $data->{0}->{data},
               account    => $data->{1}->{data},
               password   => $data->{2}->{data},
               lastchange => $data->{3}->{data},
               notes      => $data->{255}->{data},
           };
           my $acctv4 = {
               name       => $acct->{0}->{data},
               account    => $acct->{1}->{data},
               password   => $acct->{2}->{data},
               lastchange => $acct->{3}->{data},
               notes      => $acct->{255}->{data},
           };
           $encrypted = _encrypt_v4($datav4, $acctv4, $self->{digest});
   
       } elsif ($self->{version} == 5) {
           ($encrypted, $ivec) = _encrypt_v5(
               $data, $acct,
               $self->{appinfo}->{key},
               $self->{appinfo}->{cipher},
               $ivec,
           );
           if (defined $ivec) {
               $rec->{ivec} = $ivec;
         }          }
   
         my ( $name, $encrypted ) = split /$NULL/xm, $rec->{'data'}, 2;      } else {
         if (! $encrypted) { next; };          croak "Unsupported Version $self->{version}";
       }
   
         $rec->{'plaintext'}->{'name'} = $name;      $rec->{plaintext}->{0} = $data->{0};
   
         my $decrypted = _crypt3des( $encrypted, $self->{'digest'}, $DECRYPT );      if ($encrypted) {
         my ( $account, $password, $description, $extra ) = split /$NULL/xm,          if ($encrypted eq '1') {
           $decrypted, 4;              return 1;
           }
   
         $rec->{'plaintext'}->{'account'} = defined $account ? $account : $EMPTY;          $rec->{attributes}{Dirty} = 1;
         $rec->{'plaintext'}->{'password'} =          $rec->{attributes}{dirty} = 1;
           defined $password ? $password : $EMPTY;          $rec->{encrypted} = $encrypted;
         $rec->{'plaintext'}->{'description'} =  
           defined $description ? $description : $EMPTY;  
   
         #print "Name:      '$name'\n";          return 1;
         #print "Encrypted: '$encrypted' - Length: " . length($encrypted) . "\n";      } else {
         #print "    Hex:   '" . unpack("H*", $encrypted) . "'\n";          return;
         #print "    Binary:'" . unpack("b*", $encrypted) . "'\n";      }
         #print "Decrypted: '$decrypted' - Length: " . length($decrypted) . "\n";  }
         #print "    Hex:   '" . unpack("H*", $decrypted) . "'\n";  
         #print "    Binary:'" . unpack("b*", $decrypted) . "'\n";  
         #print "\n";  
         #print "Extra: $extra\n";  
         #exit;  
         #--------------------------------------------------  
         # print "Account:     $account\n";  
         # print "Password:    $password\n";  
         # print "Description: $description\n";  
         #--------------------------------------------------  
   
   sub _encrypt_v4
   {
       my $new    = shift;
       my $old    = shift;
       my $digest = shift;
   
       $new->{account}  ||= $EMPTY;
       $new->{password} ||= $EMPTY;
       $new->{notes}    ||= $EMPTY;
   
       my $changed      = 0;
       my $need_newdate = 0;
       if ($old && %{ $old }) {
           no warnings 'uninitialized';
           foreach my $key (keys %{ $new }) {
               next if $key eq 'lastchange';
               if ($new->{$key} ne $old->{$key}) {
                   $changed = 1;
                   last;
               }
           }
           if ( exists $new->{lastchange} && exists $old->{lastchange} && (
               $new->{lastchange}->{day}   != $old->{lastchange}->{day}   ||
               $new->{lastchange}->{month} != $old->{lastchange}->{month} ||
               $new->{lastchange}->{year}  != $old->{lastchange}->{year}
           )) {
               $changed = 1;
               $need_newdate = 0;
           } else {
               $need_newdate = 1;
           }
   
       } else {
           $changed = 1;
     }      }
   
     return 1;      # no need to re-encrypt if it has not changed.
       return 1 if ! $changed;
   
       my ($day, $month, $year);
   
       if ($new->{lastchange} && ! $need_newdate ) {
           $day   = $new->{lastchange}->{day}   || 1;
           $month = $new->{lastchange}->{month} || 0;
           $year  = $new->{lastchange}->{year}  || 0;
   
           # XXX Need to actually validate the above information somehow
           if ($year >= 1900) {
               $year -= 1900;
           }
       } else {
           $need_newdate = 1;
       }
   
       if ($need_newdate) {
           ($day, $month, $year) = (localtime)[3,4,5];
       }
   
       my $packed_date = _pack_keyring_date( {
               year  => $year,
               month => $month,
               day   => $day,
       });
   
       my $plaintext = join $NULL,
           $new->{account}, $new->{password}, $new->{notes}, $packed_date;
   
       return _crypt3des( $plaintext, $digest, $ENCRYPT );
 }  }
   
 sub _calc_keys {  sub _encrypt_v5
     my $pass = shift;  {
     if (! defined $pass) { croak('No password defined!'); };      my $new    = shift;
       my $old    = shift;
       my $key    = shift;
       my $cipher = shift;
       my $ivec   = shift;
       my $c = crypts($cipher) or croak('Unknown cipher ' . $cipher);
   
     my $digest = md5($pass);      if (! defined $ivec) {
           $ivec = pack("C*",map {rand(256)} 1..$c->{blocksize});
       }
   
     my ( $key1, $key2 ) = unpack 'a8a8', $digest;      my $changed = 0;
       my $need_newdate = 1;
       if ($new->{3}->{data}) {
           $need_newdate = 0;
       }
       foreach my $k (keys %{ $new }) {
           if (! $old) {
               $changed = 1;
           } elsif ($k == 3) {
               if ($old && (
                       $new->{$k}{data}{day}   == $old->{$k}{data}{day}   &&
                       $new->{$k}{data}{month} == $old->{$k}{data}{month} &&
                       $new->{$k}{data}{year}  == $old->{$k}{data}{year}
                   )) {
                   $changed      = 1;
                   $need_newdate = 1;
               }
   
     #--------------------------------------------------          } else {
     # print "key1: $key1: ", length $key1, "\n";              my $n = join ':', sort %{ $new->{$k} };
     # print "key2: $key2: ", length $key2, "\n";              my $o = join ':', sort %{ $old->{$k} };
     #--------------------------------------------------              if ($n ne $o) {
                   $changed = 1;
               }
           }
       }
   
     $digest = unpack 'H*', $key1 . $key2 . $key1;      return 1, 0 if $changed == 0;
   
     #--------------------------------------------------      if ($need_newdate) {
     # print "Digest: ", $digest, "\n";          my ($day, $month, $year) = (localtime)[3,4,5];
     # print length $digest, "\n";          $new->{3} = {
     #--------------------------------------------------              label => 'lastchange',
               label_id => 3,
               font  => 0,
               data => {
                   year  => $year,
                   month => $month,
                   day   => $day,
              },
           };
       } else {
           # XXX Need to actually validate the above information somehow
           if ($new->{3}->{data}->{year} >= 1900) {
               $new->{3}->{data}->{year} -= 1900;
           }
       }
   
     return $digest;      my $plaintext;
       foreach my $k (keys %{ $new }) {
           next if $new->{$k}->{label_id} == 0;
           $plaintext .= _pack_field($new->{$k});
       }
       $plaintext .= chr(0xff) x 2;
   
       my $encrypted;
       if ($c->{name} eq 'None') {
           # do nothing
           $encrypted = $plaintext;
   
       } elsif ($c->{name} eq 'DES_EDE3' or $c->{name} eq 'Rijndael') {
           require Crypt::CBC;
           my $cbc = Crypt::CBC->new(
               -key         => $key,
               -literal_key => 1,
               -iv          => $ivec,
               -cipher      => $c->{name},
               -keysize     => $c->{keylen},
               -blocksize   => $c->{blocksize},
               -header      => 'none',
               -padding     => 'oneandzeroes',
           );
   
           if (! $c) {
               croak("Unable to set up encryption!");
           }
   
           $encrypted = $cbc->encrypt($plaintext);
   
       } else {
           croak "Unsupported Crypt $c->{name}";
       }
   
       return $encrypted, $ivec;
 }  }
   
 sub _keyring_verify {  # Decrypt
   
   sub Decrypt
   {
     my $self = shift;      my $self = shift;
       my $rec  = shift;
       my $pass = shift || $self->{password};
   
       if ( ! $pass && ! $self->{appinfo}->{key}) {
           croak("password not set!\n");
       }
   
       if ( ! $rec) {
           croak("Needed parameter 'record' not passed!\n");
       }
   
       if ( $pass && ! $self->Password($pass)) {
           croak("Invalid Password!\n");
       }
   
       if ( ! $rec->{encrypted} ) {
           croak("No encrypted content!");
       }
   
       my $plaintext;
       if ($self->{version} == 4) {
           $self->{digest} ||= _calc_keys( $pass );
           my $acct = _decrypt_v4($rec->{encrypted}, $self->{digest});
           $plaintext = {
               0 => $rec->{plaintext}->{0},
               1 => {
                   label    => 'account',
                   label_id => 1,
                   font     => 0,
                   data     => $acct->{account},
               },
               2 => {
                   label    => 'password',
                   label_id => 2,
                   font     => 0,
                   data     => $acct->{password},
               },
               3 => {
                   label    => 'lastchange',
                   label_id => 3,
                   font     => 0,
                   data     => $acct->{lastchange},
               },
               255 => {
                   label    => 'notes',
                   label_id => 255,
                   font     => 0,
                   data     => $acct->{notes},
               },
           };
   
       } elsif ($self->{version} == 5) {
           $plaintext = _decrypt_v5(
               $rec->{encrypted}, $self->{appinfo}->{key},
               $self->{appinfo}->{cipher}, $rec->{ivec},
           );
           $plaintext->{0} ||= $rec->{plaintext}->{0};
   
       } else {
           croak "Unsupported Version $self->{version}";
       }
   
       if ($plaintext) {
           $rec->{plaintext} = $plaintext;
           return $plaintext;
       }
       return;
   }
   
   sub _decrypt_v4
   {
       my $encrypted = shift;
       my $digest    = shift;
   
       my $plaintext = _crypt3des( $encrypted, $digest, $DECRYPT );
       my ( $account, $password, $notes, $packed_date )
           = split /$NULL/xm, $plaintext, 4;
   
       my $modified;
       if ($packed_date) {
           $modified = _parse_keyring_date($packed_date);
       }
   
       return {
           account    => $account,
           password   => $password,
           notes      => $notes,
           lastchange => $modified,
       };
   }
   
   sub _decrypt_v5
   {
   
       my $encrypted = shift;
       my $key       = shift;
       my $cipher    = shift;
       my $ivec      = shift;
   
       my $c = crypts($cipher) or croak('Unknown cipher ' . $cipher);
   
       my $plaintext;
   
       if ($c->{name} eq 'None') {
           # do nothing
           $plaintext = $encrypted;
   
       } elsif ($c->{name} eq 'DES_EDE3' or $c->{name} eq 'Rijndael') {
           require Crypt::CBC;
           my $cbc = Crypt::CBC->new(
               -key         => $key,
               -literal_key => 1,
               -iv          => $ivec,
               -cipher      => $c->{name},
               -keysize     => $c->{keylen},
               -blocksize   => $c->{blocksize},
               -header      => 'none',
               -padding     => 'oneandzeroes',
           );
   
           if (! $c) {
               croak("Unable to set up encryption!");
           }
           my $len = $c->{blocksize} - length($encrypted) % $c->{blocksize};
           $encrypted .= $NULL x $len;
           $plaintext  = $cbc->decrypt($encrypted);
   
       } else {
           croak "Unsupported Crypt $c->{name}";
       }
   
       my %fields;
       while ($plaintext) {
           my $field;
           ($field, $plaintext) = _parse_field($plaintext);
           if (! $field) {
               last;
           }
           $fields{ $field->{label_id} } = $field;
       }
   
       return \%fields;
   }
   
   # Password
   
   sub Password
   {
       my $self = shift;
     my $pass = shift;      my $pass = shift;
       my $new_pass = shift;
   
     if (! $pass) { croak('No password specified!'); };      if (! $pass) {
           delete $self->{password};
           delete $self->{appinfo}->{key};
           return 1;
       }
   
     # AFAIK the thing we use to test the password is      if (
     #     always in the first entry          ($self->{version} == 4 && ! exists $self->{encpassword}) ||
     my $data = $self->{'records'}->[0]->{'data'};          ($self->{version} == 5 && ! exists $self->{appinfo}->{masterhash})
       ) {
           return $self->_password_update($pass);
       }
   
     #die "No encrypted password in file!" unless defined $data;      if ($new_pass) {
     if (! defined $data) { return; };          my @accts = ();
           foreach my $rec (@{ $self->{records} }) {
               my $acct = $self->Decrypt($rec, $pass);
               if ( ! $acct ) {
                   croak("Couldn't decrypt $rec->{plaintext}->{0}->{data}");
               }
               push @accts, $acct;
           }
   
           if ( ! $self->_password_update($new_pass)) {
               croak("Couldn't set new password!");
           }
           $pass = $new_pass;
   
           foreach my $i (0..$#accts) {
               delete $self->{records}->[$i]->{encrypted};
               $self->{records}->[$i]->{plaintext} = $accts[$i];
               $self->Encrypt($self->{records}->[$i], $pass);
           }
       }
   
       if (defined $self->{password} && $pass eq $self->{password}) {
           # already verified this password
           return 1;
       }
   
       if ($self->{version} == 4) {
           my $valid = _password_verify_v4($pass, $self->{encpassword});
   
           # May as well generate the keys we need now,
           # since we know the password is right
           if ($valid) {
               $self->{digest} = _calc_keys($pass);
               if ($self->{digest} ) {
                   $self->{password} = $pass;
                   return 1;
               }
           }
       } elsif ($self->{version} == 5) {
           return _password_verify_v5($self->{appinfo}, $pass);
       } else {
           croak "Unsupported version $self->{version}";
       }
   
       return;
   }
   
   sub _password_verify_v4
   {
       require Digest::MD5;
       import Digest::MD5 qw(md5);
   
       my $pass = shift;
       my $data = shift;
   
       if (! $pass) { croak('No password specified!'); };
   
       # XXX die "No encrypted password in file!" unless defined $data;
       if ( ! defined $data) { return; };
   
     $data =~ s/$NULL$//xm;      $data =~ s/$NULL$//xm;
   
     my $salt = substr $data, 0, $kSalt_Size;      my $salt = substr $data, 0, $kSalt_Size;
   
     my $msg = $salt . $pass;      my $msg = $salt . $pass;
   
     $msg .= "\0" x ( $MD5_CBLOCK - length $msg );      $msg .= "\0" x ( $MD5_CBLOCK - length $msg );
   
     my $digest = md5($msg);      my $digest = md5($msg);
   
     if ( $data eq $salt . $digest ) {      if ($data ne $salt . $digest ) {
           return;
       }
   
 # May as well generate the keys we need now, since we know the password is right      return 1;
         $self->{'digest'} = _calc_keys($pass);  }
         if ( $self->{'digest'} ) {  
             $self->{'password'} = $pass;  sub _password_verify_v5
             return 1;  {
         }      my $appinfo = shift;
       my $pass    = shift;
   
       my $salt = pack("H*", $appinfo->{salt});
   
       my $c = crypts($appinfo->{cipher})
           or croak('Unknown cipher ' . $appinfo->{cipher});
       my ($key, $hash) = _calc_key_v5(
           $pass, $salt, $appinfo->{iter},
           $c->{keylen},
           $c->{DES_odd_parity},
       );
   
       #print "Iter: '" . $appinfo->{iter} . "'\n";
       #print "Key:  '". unpack("H*", $key) . "'\n";
       #print "Salt: '". unpack("H*", $salt) . "'\n";
       #print "Hash: '". $hash . "'\n";
       #print "Hash: '". $appinfo->{masterhash} . "'\n";
   
       if ($appinfo->{masterhash} eq $hash) {
           $appinfo->{key} = $key;
       } else {
           return;
     }      }
     return;  
       return $key;
 }  }
   
 sub _keyring_update {  
   
   sub _password_update
   {
     # It is very important to Encrypt after calling this      # It is very important to Encrypt after calling this
     #     (Although it is generally only called by Encrypt)      #     (Although it is generally only called by Encrypt)
     # because otherwise the data will be out of sync with the      # because otherwise the data will be out of sync with the
     # password, and that would suck!      # password, and that would suck!
     my $self = shift;      my $self   = shift;
     my $pass = shift;      my $pass   = shift;
   
     if (! $pass) { croak('No password specified!'); };      if ($self->{version} == 4) {
           my $data = _password_update_v4($pass, @_);
   
     # if the database already has a password in it          if (! $data) {
     if ( $self->{'records'}->[0]->{'data'} ) {              carp("Failed  to update password!");
               return;
           }
   
         # Make sure everything is decrypted before we update the keyring          # AFAIK the thing we use to test the password is
         $self->Decrypt() || return;          #     always in the first entry
           $self->{encpassword} = $data;
           $self->{password} = $pass;
           $self->{digest}   = _calc_keys( $self->{password} );
   
           return 1;
   
       } elsif ($self->{version} == 5) {
           my $cipher  = shift || $self->{appinfo}->{cipher};
           my $iter    = shift || $self->{appinfo}->{iter};
           my $salt    = shift || 0;
   
           my $hash = _password_update_v5(
               $self->{appinfo}, $pass, $cipher, $iter, $salt
           );
   
           if (! $hash) {
               carp("Failed  to update password!");
               return;
           }
   
           return 1;
       } else {
           croak("Unsupported version ($self->{version})");
     }      }
   
       return;
   }
   
   sub _password_update_v4
   {
       require Digest::MD5;
       import Digest::MD5 qw(md5);
   
       my $pass = shift;
   
       if (! defined $pass) { croak('No password specified!'); };
   
     my $salt;      my $salt;
     for ( 1 .. $kSalt_Size ) {      for ( 1 .. $kSalt_Size ) {
         $salt .= chr int rand 255;          $salt .= chr int rand 255;
Line 297 
Line 1028 
   
     my $data = $salt . $digest;    # . "\0";      my $data = $salt . $digest;    # . "\0";
   
     # AFAIK the thing we use to test the password is      return $data;
     #     always in the first entry  }
     $self->{'records'}->[0]->{'data'} = $data;  
   
     $self->{'password'} = $pass;  sub _password_update_v5
     $self->{'digest'}   = _calc_keys( $self->{'password'} );  {
       my $appinfo = shift;
       my $pass    = shift;
       my $cipher  = shift;
       my $iter    = shift;
   
       # I thought this needed to be 'blocksize', but apparently not.
       #my $length  = $CRYPTS[ $cipher ]{blocksize};
       my $length  = 8;
       my $salt    = shift || pack("C*",map {rand(256)} 1..$length);
   
       my $c = crypts($cipher) or croak('Unknown cipher ' . $cipher);
       my ($key, $hash) = _calc_key_v5(
           $pass, $salt, $iter,
           $c->{keylen},
           $c->{DES_odd_parity},
       );
   
       $appinfo->{salt}           = unpack "H*", $salt;
       $appinfo->{iter}           = $iter;
       $appinfo->{cipher}         = $cipher;
       $appinfo->{masterhash}     = $hash;
       $appinfo->{key}            = $key;
   
       return $key;
   }
   
   sub Unlock
   {
       my $self = shift;
       my ($pass) = @_;
       $pass ||= $self->{password};
   
       if ( $pass && ! $self->Password($pass)) {
           croak("Invalid Password!\n");
       }
   
       foreach my $rec (@{ $self->{records} }) {
           $self->Decrypt($rec);
       }
   
     return 1;      return 1;
   
 }  }
   
 sub _crypt3des {  sub Lock
   {
       my $self = shift;
   
       $self->Password();
   
       foreach my $rec (@{ $self->{records} }) {
           my $name = $rec->{plaintext}->{0};
           delete $rec->{plaintext};
           $rec->{plaintext}->{0} = $name;
       }
   
       return 1;
   }
   
   # Helpers
   
   sub _calc_keys
   {
       my $pass = shift;
       if (! defined $pass) { croak('No password defined!'); };
   
       my $digest = md5($pass);
   
       my ( $key1, $key2 ) = unpack 'a8a8', $digest;
   
       #--------------------------------------------------
       # print "key1: $key1: ", length $key1, "\n";
       # print "key2: $key2: ", length $key2, "\n";
       #--------------------------------------------------
   
       $digest = unpack 'H*', $key1 . $key2 . $key1;
   
       #--------------------------------------------------
       # print "Digest: ", $digest, "\n";
       # print length $digest, "\n";
       #--------------------------------------------------
   
       return $digest;
   }
   
   sub _calc_key_v5
   {
       my ($pass, $salt, $iter, $keylen, $dop) = @_;
   
       require Digest::HMAC_SHA1;
       import  Digest::HMAC_SHA1 qw(hmac_sha1);
       require Digest::SHA1;
       import  Digest::SHA1 qw(sha1);
   
       my $key = _pbkdf2( $pass, $salt, $iter, $keylen, \&hmac_sha1 );
       if ($dop) { $key = _DES_odd_parity($key); }
   
       my $hash = unpack("H*", substr(sha1($key.$salt),0, 8));
   
       return $key, $hash;
   }
   
   sub _crypt3des
   {
       require Crypt::DES;
   
     my ( $plaintext, $passphrase, $flag ) = @_;      my ( $plaintext, $passphrase, $flag ) = @_;
   
     $passphrase   .= $SPACE x ( 16 * 3 );      $passphrase   .= $SPACE x ( 16 * 3 );
Line 329 
Line 1160 
         #print "PT: '$pt' - Length: " . length($pt) . "\n";          #print "PT: '$pt' - Length: " . length($pt) . "\n";
         if (! length $pt) { next; };          if (! length $pt) { next; };
         if ( (length $pt) < 8 ) {          if ( (length $pt) < 8 ) {
                         if ($flag == $DECRYPT) { croak('record not 8 byte padded'); };              if ($flag == $DECRYPT) { croak('record not 8 byte padded'); };
             my $len = 8 - (length $pt);              my $len = 8 - (length $pt);
   
             #print "LENGTH: $len\n";  
             #print "Binary:    '" . unpack("b*", $pt) . "'\n";  
             $pt .= ($NULL x $len);              $pt .= ($NULL x $len);
   
             #print "PT: '$pt' - Length: " . length($pt) . "\n";  
             #print "Binary:    '" . unpack("b*", $pt) . "'\n";  
         }          }
         if ( $flag == $ENCRYPT ) {          if ( $flag == $ENCRYPT ) {
             $pt = $C[0]->encrypt($pt);              $pt = $C[0]->encrypt($pt);
Line 361 
Line 1186 
     return $cyphertext;      return $cyphertext;
 }  }
   
   sub _parse_field
   {
       my $field = shift;
   
       my ($len) = unpack "n", $field;
       if ($len + 4 > length $field) {
           return (undef, $field);
       }
       my $unpackstr = "x2 C1 C1 A$len";
       my $offset    =   2 +1 +1 +$len;
       if ($len % 2) {
           # trim the 0/1 byte padding for next even address.
           $offset++;
           $unpackstr .= ' x'
       }
   
       my ($label, $font, $data) = unpack $unpackstr, $field;
       my $leftover = substr $field, $offset;
   
       my $label_id = $label;
       my $l = labels($label);
       if ($l) {
           $label = $l->{name} || $l->{id};
           $label_id = $l->{id};
       }
   
       if ($label_id && $label_id == 3) {
           ($data) = substr $field, 4, $len;
           $data = _parse_keyring_date($data);
       }
       return {
           #len      => $len,
           label    => $label,
           label_id => $label_id,
           font     => $font,
           data     => $data,
       }, $leftover;
   }
   
   sub _pack_field
   {
       my $field = shift;
   
       my $packed;
       if (defined $field) {
           my $label = $field->{label_id} || 0;
           if (defined $field->{label} && ! $label) {
               $label = $field->{label};
           }
   
           my $l = labels($field->{label});
           if ($l) {
               $label = $l->{id};
           }
   
           my $font  = $field->{font} || 0;
           my $data  = defined $field->{data} ? $field->{data} : $EMPTY;
   
           if ($label && $label == 3) {
               $data = _pack_keyring_date($data);
           }
           my $len = length $data;
           my $packstr = "n1 C1 C1 A*";
   
           $packed = pack $packstr, ($len, $label, $font, $data);
   
           if ($len % 2) {
               # add byte padding for next even address.
               $packed .= $NULL;
           }
       } else {
           my $packstr = "n1 C1 C1 x1";
           $packed = pack $packstr, 0, 0, 0;
       }
   
       return $packed;
   }
   
   sub _parse_keyring_date
   {
       my $data = shift;
   
       my $u = unpack 'n', $data;
       my $year  = (($u & 0xFE00) >> 9) + 4; # since 1900
       my $month = (($u & 0x01E0) >> 5) - 1; # 0-11
       my $day   = (($u & 0x001F) >> 0);     # 1-31
   
       return {
           year   => $year,
           month  => $month || 0,
           day    => $day   || 1,
       };
   }
   
   sub _pack_keyring_date
   {
       my $d = shift;
       my $year  = $d->{year};
       my $month = $d->{month};
       my $day   = $d->{day};
   
       $year -= 4;
       $month++;
   
       return pack 'n*', $day | ($month << 5) | ($year << 9);
   }
   
   
   sub _hexdump
   {
       my $prefix = shift;   # What to print in front of each line
       my $data = shift;     # The data to dump
       my $maxlines = shift; # Max # of lines to dump
       my $offset;           # Offset of current chunk
   
       my @lines;
   
       for ($offset = 0; $offset < length($data); $offset += 16)
       {
           my $hex;   # Hex values of the data
           my $ascii; # ASCII values of the data
           my $chunk; # Current chunk of data
   
           last if defined($maxlines) && ($offset >= ($maxlines * 16));
   
           $chunk = substr($data, $offset, 16);
   
           ($hex = $chunk) =~ s/./sprintf "%02x ", ord($&)/ges;
   
           ($ascii = $chunk) =~ y/\040-\176/./c;
   
           push @lines, sprintf "%s %-48s|%-16s|\n", $prefix, $hex, $ascii;
       }
       return wantarray ? @lines : \@lines;
   }
   
   sub _bindump
   {
       my $prefix = shift;   # What to print in front of each line
       my $data = shift;     # The data to dump
       my $maxlines = shift; # Max # of lines to dump
       my $offset;           # Offset of current chunk
   
       my @lines;
   
       for ($offset = 0; $offset < length($data); $offset += 8)
       {
           my $bin;   # binary values of the data
           my $ascii; # ASCII values of the data
           my $chunk; # Current chunk of data
   
           last if defined($maxlines) && ($offset >= ($maxlines * 8));
   
           $chunk = substr($data, $offset, 8);
   
           ($bin = $chunk) =~ s/./sprintf "%08b ", ord($&)/ges;
   
           ($ascii = $chunk) =~ y/\040-\176/./c;
   
           push @lines, sprintf "%s %-72s|%-8s|\n", $prefix, $bin, $ascii;
       }
       return wantarray ? @lines : \@lines;
   }
   
   # Thanks to Jochen Hoenicke <hoenicke@gmail.com>
   # (one of the authors of Palm Keyring)
   # for these next two subs.
   
   # Usage pbkdf2(password, salt, iter, keylen, prf)
   # iter is number of iterations
   # keylen is length of generated key in bytes
   # prf is the pseudo random function (e.g. hmac_sha1)
   # returns the key.
   sub _pbkdf2
   {
       my ($password, $salt, $iter, $keylen, $prf) = @_;
       my ($k, $t, $u, $ui, $i);
       $t = "";
       for ($k = 1; length($t) <  $keylen; $k++) {
       $u = $ui = &$prf($salt.pack('N', $k), $password);
       for ($i = 1; $i < $iter; $i++) {
           $ui = &$prf($ui, $password);
           $u ^= $ui;
       }
       $t .= $u;
       }
       return substr($t, 0, $keylen);
   }
   
   sub _DES_odd_parity {
       my $key = $_[0];
       my ($r, $i);
       my @odd_parity = (
     1,  1,  2,  2,  4,  4,  7,  7,  8,  8, 11, 11, 13, 13, 14, 14,
    16, 16, 19, 19, 21, 21, 22, 22, 25, 25, 26, 26, 28, 28, 31, 31,
    32, 32, 35, 35, 37, 37, 38, 38, 41, 41, 42, 42, 44, 44, 47, 47,
    49, 49, 50, 50, 52, 52, 55, 55, 56, 56, 59, 59, 61, 61, 62, 62,
    64, 64, 67, 67, 69, 69, 70, 70, 73, 73, 74, 74, 76, 76, 79, 79,
    81, 81, 82, 82, 84, 84, 87, 87, 88, 88, 91, 91, 93, 93, 94, 94,
    97, 97, 98, 98,100,100,103,103,104,104,107,107,109,109,110,110,
   112,112,115,115,117,117,118,118,121,121,122,122,124,124,127,127,
   128,128,131,131,133,133,134,134,137,137,138,138,140,140,143,143,
   145,145,146,146,148,148,151,151,152,152,155,155,157,157,158,158,
   161,161,162,162,164,164,167,167,168,168,171,171,173,173,174,174,
   176,176,179,179,181,181,182,182,185,185,186,186,188,188,191,191,
   193,193,194,194,196,196,199,199,200,200,203,203,205,205,206,206,
   208,208,211,211,213,213,214,214,217,217,218,218,220,220,223,223,
   224,224,227,227,229,229,230,230,233,233,234,234,236,236,239,239,
   241,241,242,242,244,244,247,247,248,248,251,251,253,253,254,254);
       for ($i = 0; $i< length($key); $i++) {
       $r .= chr($odd_parity[ord(substr($key, $i, 1))]);
       }
       return $r;
   }
   
 1;  1;
 __END__  __END__
   
 =head1 NAME  =head1 NAME
   
 Palm::Keyring - Handler for Palm Keyring databases.  Palm::Keyring - Handler for Palm Keyring databases.
Line 374 
Line 1413 
 parses Keyring for Palm OS databases.  See  parses Keyring for Palm OS databases.  See
 L<http://gnukeyring.sourceforge.net/>.  L<http://gnukeyring.sourceforge.net/>.
   
 It has the standard Palm::PDB methods with 2 additional public methods.  It has the standard Palm::PDB methods with 4 additional public methods.
 Decrypt and Encrypt.  Unlock, Lock, Decrypt and Encrypt.
   
 It currently supports the v4 Keyring databases.  The v5 databases from the pre-release keyring-2.0 are not supported.  It currently supports the v4 Keyring databases as well as
   the pre-release v5 databases.
   
 =head1 SYNOPSIS  =head1 SYNOPSIS
   
         use Palm::PDB;      use Palm::PDB;
         use Palm::Keyring;      use Palm::Keyring;
         my $pdb = new Palm::PDB;  
         $pdb->Load($file);      my $pass = 'password';
         foreach my $rec (@{ $pdb->{'records'} }) {      my $file = 'Keys-Gtkr.pdb';
                 print "$rec->{'plaintext'}->{'name'}\n";      my $pdb  = new Palm::PDB;
         }      $pdb->Load($file);
         $pdb->Decrypt($password);  
         # do something with the decrypted parts      $pdb->Unlock($pass);
       foreach my $rec (@{ $pdb->{records} }) {
           print $rec->{plaintext}->{0}->{data}, ' - ',
                 $rec->{plaintext}->{1}->{data}, "\n";
       }
       $pdb->Lock();
   
 =head1 SUBROUTINES/METHODS  =head1 SUBROUTINES/METHODS
   
 =head2 new  =head2 new
   
         $pdb = new Palm::Keyring([$password]);      $pdb = new Palm::Keyring([$password[, $version[, $cipher]]]);
   
 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.
   
 Use this method if you're creating a Keyring PDB from scratch otherwise you  Use this method if you're creating a Keyring PDB from scratch otherwise you
 can just use Palm::PDB::new().  can just use Palm::PDB::new() before calling Load().
   
 =head2 Load  If you pass in a password, it will initalize the database with the encrypted
   password.
   
         $pdb->Load($filename[, $password]);  new() now also takes options in other formats
   
 Overrides the standard Palm::Raw Load() to add      $pdb = new Palm::Keyring({ key1 => value1,  key2 => value2 });
 $rec->{'plaintext'}->{'name'} and      $pdb = new Palm::Keyring( -key1 => value1, -key2 => value2);
 $rec->{'encrypted'} fields.  
 $rec->{'plaintext'}->{'name'} holds the name of the record,  
 $rec->{'encrypted'} is the encrypted information in the PDB.  
   
 It also takes an additional optional parameter, which is the password to use to  =over
 decrypt the database.  
   
 See Decrypt() for the additional fields that are available after decryption.  =item Supported options
   
 =head2 Write  =over
   
         $pdb->Write($filename[, $password]);  =item password
   
 Just like the Palm::Raw::Write() but encrypts everything before saving.  The password used to initialize the database
   
 Also takes an optional password to encrypt with a new password, not needed  =item version
 unless you are changing the password.  
   
   The version of database to create.  Accepts either 4 or 5.  Currently defaults to 4.
   
   =item cipher
   
   The cipher to use.  Either the number or the name.  Only used by v5 datbases.
   
       0 => None
       1 => DES_EDE3
       2 => AES128
       3 => AES256
   
   =item iterations
   
   The number of iterations to encrypt with.  Only used by somy crypts in v5 databases.
   
   =item file
   
   The name of a file to Load().  This will override many of the other options.
   
   =back
   
   =back
   
   For v5 databases there are some additional appinfo fields set.
   These are set either on new() or Load().
   
       $pdb->{appinfo} = {
           # normal appinfo stuff described in L<Palm::StdAppInfo>
           cipher     => The index number of the cipher being used
           iter       => Number of iterations for the cipher
       };
   
   =head2 crypts
   
   Pass in the alias of the crypt to use, or the index.
   
   These only make sense for v5 databases.
   
   This is a function, not a method.
   
   $cipher can be 0, 1, 2, 3, None, DES_EDE3, AES128 or AES256.
   
       my $c = Palm::Keyring::crypt($cipher);
   
   $c is now:
   
       $c = {
           alias     => (None|DES_EDE3|AES128|AES256),
           name      => (None|DES_EDE3|Rijndael),
           keylen    => <key length of the cipher>,
           blocksize => <block size of the cipher>,
           default_iter => <default iterations for the cipher>,
       };
   
   If it is unable to find the crypt it will return undef.
   
   =head2 labels
   
   Pass in the id or the name of the label.  The label id is used as a key
   to the different parts of the records.
   See Encrypt() for details on where the label is used.
   
   This is a function, not a method.
   
       my $l = Palm::Keyring::labels($label);
   
   $l is now:
   
       $l = {
           id => 0,
           name => 'name',
       };
   
   If what you passed in was a number that doesn't have a name, it will return:
   
       $l => {
           id => $num_passed_in,
           name => undef,
       }
   
   If you pass in a name that it can't find, then it returns undef.
   
 =head2 Encrypt  =head2 Encrypt
   
         $pdb->Encrypt([$password]);  =head3 B<!!! IMPORTANT !!!>  The order of the arguments to Encrypt has
   changed.  $password and $plaintext used to be swapped.  They changed
   because you can now set $rec->{plaintext} and not pass in $plaintext so
   $password is more important.
   
 Encrypts the PDB, either with the password used to decrypt or create it, or      $pdb->Encrypt($rec[, $password[, $plaintext[, $ivec]]]);
 optionally with a password that is passed.  
   
 See Decrypt() for an what plaintext fields are available to be encrypted.  Encrypts an account into a record, either with the password previously
   used, or with a password that is passed.
   
   $ivec is the initialization vector to use to encrypt the record.  This is
   not used by v4 databases.  Normally this is not passed and is generated
   randomly.
   
   $rec is a record from $pdb->{records} or a new_Record().
   $rec->{plaintext} is a hashref in the format below.
   
       $plaintext = {
           0 => {
               label    => 'name',
               label_id => 0,
               font     => 0,
               data     => $name,
           1 => {
               label    => 'account',
               label_id => 1,
               font     => 0,
               data     => $account,
           },
           2 => {
               label    => 'password',
               label_id => 2,
               font     => 0,
               data     => $password,
           },
           3 => {
               label    => 'lastchange',
               label_id => 3,
               font     => 0,
               data     => {
                   year => $year, # usually the year - 1900
                   mon  => $mon,  # range 0-11
                   day  => $day,  # range 1-31
               },
           },
           255 => {
               label    => 'notes',
               label_id => 255,
               font     => 0,
               data     => $notes,
           },
       };
   
   The account name is stored in $rec->{plaintext}->{0}->{data} for both v4
   and v5 databases even when the record has not been Decrypt()ed.
   
       $rec->{plaintext}->{0} => {
           label    => 'name',
           label_id => 0,
           font     => 0,
           data     => 'account name',
       };
   
   If you have changed anything other than the lastchange, or don't pass in a
   lastchange key, Encrypt() will generate a new lastchange date for you.
   
   If you pass in a lastchange field that is different than the one in the
   record, it will honor what you passed in.
   
   You can either set $rec->{plaintext} or pass in $plaintext.  $plaintext
   is used over anything in $rec->{plaintext}.
   
   
 =head2 Decrypt  =head2 Decrypt
   
         $pdb->Decrypt([$password]);      my $plaintext = $pdb->Decrypt($rec[, $password]);
   
 Decrypts the PDB and fills out the rest of the fields available in  Decrypts the record and returns a reference for the plaintext account as
 $rec->{'plaintext'}.  described under Encrypt().
   Also sets $rec->{plaintext} with the same information as $plaintext as
   described in Encrypt().
   
 The plaintext should now be this, before encryption or after decryption:      foreach my $rec (@{ $pdb->{records} }) {
           my $plaintext = $pdb->Decrypt($rec);
           # do something with $plaintext
       }
   
         $rec->{'plaintext'} = {  
                 name        => $name,  
                 account     => $account,  
                 password    => $account_password,  
                 description => $description,  
         };  
   
   =head2 Password
   
       $pdb->Password([$password[, $new_password]]);
   
   Either sets the password to be used to crypt, or if you pass $new_password,
   changes the password on the database.
   
   If you have created a new $pdb, and you didn't set a password when you
   called new(), you only need to pass one password and it will set that as
   the password.
   
   If nothing is passed, it forgets the password that it was remembering.
   
   After a successful password verification the following fields are set
   
   For v4
   
       $pdb->{digest}   = the calculated digest used from the key;
       $pdb->{password} = the password that was passed in;
       $pdb->{encpassword} = the password as stored in the pdb;
   
   For v5
   
       $pdb->{appinfo} = {
           # As described under new() with these additional fields
           cipher     => The index number of the cipher being used
           iter       => Number of iterations for the cipher
           key        => The key that is calculated from the password
                         and salt and is used to decrypt the records.
           masterhash => the hash of the key that is stored in the
                         database.  Either set when Loading the database
                         or when setting a new password.
           salt       => the salt that is either read out of the database
                         or calculated when setting a new password.
       };
   
   =head2 Unlock
   
       $pdb->Unlock([$password]);
   
   Decrypts all the records.  Sets $rec->{plaintext} for all records.
   
   This makes it easy to show all decrypted information.
   
      my $pdb = Palm::KeyRing->new();
      $pdb->Load($keyring_file);
      $pdb->Unlock($password);
      foreach my $plaintext (map { $_->{plaintext} } @{ $pdb->{records} }) {
          # Do something like display the account.
      }
      $pdb->Lock();
   
   =head2 Lock
   
       $pdb->Lock();
   
   Unsets $rec->{plaintext} for all records and unsets the saved password.
   
   This does NOT Encrypt() any of the records before clearing them, so if
   you are not careful you will lose information.
   
   B<CAVEAT!> This only does "delete $rec->{plaintext}" and the same for the
   password.  If someone knows of a cross platform reliable way to make
   sure that the information is actually cleared from memory I would
   appreciate it.  Also, if someone knows how to make sure that the stuff
   in $rec->{plaintext} is not written to swap, that would be very handy as
   well.
   
   =head2 Other overridden subroutines/methods
   
   =over
   
   =item ParseAppInfoBlock
   
   Converts the extra returned by Palm::StdAppInfo::ParseAppInfoBlock() into
   the following additions to $pdb->{appinfo}
   
       $pdb->{appinfo} = {
           cipher     => The index number of the cipher being used (Not v4)
           iter       => Number of iterations for the cipher (Not v4)
       };
   
   =item PackAppInfoBlock
   
   Reverses ParseAppInfoBlock before
   sending it on to Palm::StdAppInfo::PackAppInfoBlock()
   
   =item ParseRecord
   
   Adds some fields to a record from Palm::StdAppInfo::ParseRecord()
   
       $rec = {
           name       => Account name
           ivec       => The IV for the encrypted record.  (Not v4)
           encrypted  => the encrypted information
       };
   
   For v4 databases it also removes record 0 and moves the encrypted password
   to $self->{encpassword}.
   
   =item PackRecord
   
   Reverses ParseRecord and then sends it through Palm::StdAppInfo::PackRecord()
   
   =item Write
   
   For v4 databases it puts back the record 0 for the encrypted password before
   writing it.
   
   =back
   
 =head1 DEPENDENCIES  =head1 DEPENDENCIES
   
 Palm::StdAppInfo  Palm::StdAppInfo
   
   B<For v4 databases>
   
 Digest::MD5  Digest::MD5
   
 Crypt::DES  Crypt::DES
   
 Readonly  B<For v5 databases>
   
   Digest::HMAC_SHA1
   
   Digest::SHA1
   
   Depending on how the database is encrypted
   
   Crypt::CBC - For any encryption but None
   
   Crypt::DES_EDE3 - DES_EDE3 encryption
   
   Crytp::Rijndael - AES encryption schemes
   
   =head1 THANKS
   
   I would like to thank the helpful Perlmonk shigetsu who gave me some great
   advice and helped me get my first module posted.
   L<http://perlmonks.org/?node_id=596998>
   
   I would also like to thank
   Johan Vromans
   E<lt>jvromans@squirrel.nlE<gt> --
   L<http://www.squirrel.nl/people/jvromans>.
   He had his own Palm::KeyRing module that he posted a couple of days before
   mine was ready and he was kind enough to let me have the namespace as well
   as giving me some very helpful hints about doing a few things that I was
   unsure of.  He is really great.
   
   And finally,
   thanks to Jochen Hoenicke E<lt>hoenicke@gmail.comE<gt>
   (one of the authors of Palm Keyring)
   for getting me started on the v5 support as well as providing help
   and some subroutines.
   
 =head1 BUGS AND LIMITATIONS  =head1 BUGS AND LIMITATIONS
   
 Once this module is uploaded, you can  I am sure there are problems with this module.  For example, I have
   not done very extensive testing of the v5 databases.
   
   I am not sure I am 'require module' the best way, but I don't want to
   depend on modules that you don't need to use.
   
   The date validation for packing new dates is very poor.
   
   I have not gone through and standardized on how the module fails.  Some
   things fail with croak, some return undef, some may even fail silently.
   Nothing initializes a lasterr method or anything like that.
   
   This module does not do anything special with the plaintext data.  It SHOULD
   treat it somehow special so that it can't be found in RAM or in a swap file
   anywhere.  I don't have a clue how to do this.
   
   I need to fix all this before it is a 1.0 candidate.
   
 Please report any bugs or feature requests to  Please report any bugs or feature requests to
 C<bug-palm-keyring at rt.cpan.org>, or through the web interface at  C<bug-palm-keyring at rt.cpan.org>, or through the web interface at
 L<http://rt.cpan.org>.  I will be notified, and then you'll automatically be  L<http://rt.cpan.org>.  I will be notified, and then you'll automatically be
Line 472 
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 =head1 AUTHOR  =head1 AUTHOR
   
 Andrew Fresh E<lt>andrew@mad-techies.orgE<gt>  Andrew Fresh E<lt>andrew@cpan.orgE<gt>
   
 =head1 LICENSE AND COPYRIGHT  =head1 LICENSE AND COPYRIGHT
   
Line 489 
Line 1840 
   
 The Keyring for Palm OS website:  The Keyring for Palm OS website:
 L<http://gnukeyring.sourceforge.net/>  L<http://gnukeyring.sourceforge.net/>
   
   The HACKING guide for palm keyring databases:
   L<http://gnukeyring.cvs.sourceforge.net/*checkout*/gnukeyring/keyring/HACKING>
   
   Johan Vromans also has a wxkeyring app that now uses this module, available
   from his website at L<http://www.vromans.org/johan/software/sw_palmkeyring.html>
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