=================================================================== RCS file: /cvs/palm/Palm-Keyring/lib/Palm/Keyring.pm,v retrieving revision 1.38 retrieving revision 1.43 diff -u -r1.38 -r1.43 --- palm/Palm-Keyring/lib/Palm/Keyring.pm 2007/02/23 02:54:49 1.38 +++ palm/Palm-Keyring/lib/Palm/Keyring.pm 2007/02/23 22:05:17 1.43 @@ -1,5 +1,5 @@ package Palm::Keyring; -# $RedRiver: Keyring.pm,v 1.37 2007/02/23 02:34:01 andrew Exp $ +# $RedRiver: Keyring.pm,v 1.42 2007/02/23 03:41:28 andrew Exp $ ######################################################################## # Keyring.pm *** Perl class for Keyring for Palm OS databases. # @@ -107,11 +107,11 @@ # Set defaults if ($self->{version} == 5) { $self->{options}->{cipher} ||= 0; # 'None' - $self->{options}->{iterations} ||= - $CRYPTS[ $self->{options}->{cipher} ]{default_iter}; - - $self->{appinfo}->{cipher} ||= $self->{options}->{cipher}; - $self->{appinfo}->{iter} ||= $self->{options}->{iterations}; + 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}; }; if ( defined $options->{password} ) { @@ -132,7 +132,9 @@ sub crypts { my $crypt = shift; - if ($crypt =~ /\D/) { + if (! defined $crypt || ! length $crypt) { + return; + } elsif ($crypt =~ /\D/) { foreach my $c (@CRYPTS) { if ($c->{alias} eq $crypt) { return $c; @@ -166,7 +168,9 @@ delete $rec->{data}; } elsif ($self->{version} == 5) { - my $blocksize = $CRYPTS[ $self->{appinfo}->{cipher} ]{blocksize}; + 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}; @@ -488,12 +492,10 @@ my $key = shift; my $cipher = shift; my $ivec = shift; - my $blocksize = $CRYPTS[ $cipher ]{blocksize}; - my $keylen = $CRYPTS[ $cipher ]{keylen}; - my $cipher_name = $CRYPTS[ $cipher ]{name}; + my $c = crypts($cipher) or croak('Unknown cipher ' . $cipher); if (! defined $ivec) { - $ivec = pack("C*",map {rand(256)} 1..$blocksize); + $ivec = pack("C*",map {rand(256)} 1..$c->{blocksize}); } my $changed = 0; @@ -558,19 +560,19 @@ $decrypted .= _pack_field($field); } my $encrypted; - if ($cipher_name eq 'None') { + if ($c->{name} eq 'None') { # do nothing $encrypted = $decrypted; - } elsif ($cipher_name eq 'DES_EDE3' or $cipher_name eq 'Rijndael') { + } elsif ($c->{name} eq 'DES_EDE3' or $c->{name} eq 'Rijndael') { require Crypt::CBC; - my $c = Crypt::CBC->new( + my $cbc = Crypt::CBC->new( -key => $key, -literal_key => 1, -iv => $ivec, - -cipher => $cipher_name, - -keysize => $keylen, - -blocksize => $blocksize, + -cipher => $c->{name}, + -keysize => $c->{keylen}, + -blocksize => $c->{blocksize}, -header => 'none', -padding => 'oneandzeroes', ); @@ -579,7 +581,7 @@ croak("Unable to set up encryption!"); } - $encrypted = $c->encrypt($decrypted); + $encrypted = $cbc->encrypt($decrypted); } else { die "Unsupported Version"; @@ -670,25 +672,23 @@ my $cipher = shift; my $ivec = shift; - my $keylen = $CRYPTS[ $cipher ]{keylen}; - my $cipher_name = $CRYPTS[ $cipher ]{name}; - my $blocksize = $CRYPTS[ $cipher ]{blocksize}; + my $c = crypts($cipher) or croak('Unknown cipher ' . $cipher); my $decrypted; - if ($cipher_name eq 'None') { + if ($c->{name} eq 'None') { # do nothing $decrypted = $encrypted; - } elsif ($cipher_name eq 'DES_EDE3' or $cipher_name eq 'Rijndael') { + } elsif ($c->{name} eq 'DES_EDE3' or $c->{name} eq 'Rijndael') { require Crypt::CBC; - my $c = Crypt::CBC->new( + my $cbc = Crypt::CBC->new( -key => $key, -literal_key => 1, -iv => $ivec, - -cipher => $cipher_name, - -keysize => $keylen, - -blocksize => $blocksize, + -cipher => $c->{name}, + -keysize => $c->{keylen}, + -blocksize => $c->{blocksize}, -header => 'none', -padding => 'oneandzeroes', ); @@ -696,9 +696,9 @@ if (! $c) { croak("Unable to set up encryption!"); } - my $len = $blocksize - length($encrypted) % $blocksize; + my $len = $c->{blocksize} - length($encrypted) % $c->{blocksize}; $encrypted .= $NULL x $len; - $decrypted = $c->decrypt($encrypted); + $decrypted = $cbc->decrypt($encrypted); } else { die "Unsupported Version"; @@ -840,10 +840,12 @@ 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}, - $CRYPTS[ $appinfo->{cipher} ]{keylen}, - $CRYPTS[ $appinfo->{cipher} ]{DES_odd_parity}, + $c->{keylen}, + $c->{DES_odd_parity}, ); #print "Iter: '" . $appinfo->{iter} . "'\n"; @@ -946,18 +948,18 @@ 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, - $CRYPTS[ $cipher ]->{keylen}, - $CRYPTS[ $cipher ]->{DES_odd_parity}, + $c->{keylen}, + $c->{DES_odd_parity}, ); $appinfo->{salt} = unpack "H*", $salt; $appinfo->{iter} = $iter; $appinfo->{cipher} = $cipher; - - $appinfo->{key} = $key; $appinfo->{masterhash} = $hash; + $appinfo->{key} = $key; return $key; } @@ -998,7 +1000,7 @@ import Digest::SHA1 qw(sha1); my $key = _pbkdf2( $pass, $salt, $iter, $keylen, \&hmac_sha1 ); - if ($dop) { $key = DES_odd_parity($key); } + if ($dop) { $key = _DES_odd_parity($key); } my $hash = unpack("H*", substr(sha1($key.$salt),0, 8)); @@ -1240,7 +1242,7 @@ return substr($t, 0, $keylen); } -sub DES_odd_parity($) { +sub _DES_odd_parity($) { my $key = $_[0]; my ($r, $i); my @odd_parity = ( @@ -1283,7 +1285,7 @@ It currently supports the v4 Keyring databases as well as the pre-release v5 databases. I am not completely happy with the interface -for accessing the v5 database, so any suggestions on improvements on +for accessing v5 databases, so any suggestions on improvements on the interface are appreciated. This module doesn't store the decrypted content. It only keeps it until it @@ -1359,7 +1361,7 @@ =item cipher -The cipher to use. 0, 1, 2 or 3. +The cipher to use. Either the number or the name. 0 => None 1 => DES_EDE3 @@ -1379,6 +1381,7 @@ =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 @@ -1386,13 +1389,14 @@ iter => Number of iterations for the cipher }; -=head2 crypt +=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); @@ -1481,7 +1485,7 @@ Decrypts the record and returns a reference for the account as described under Encrypt(). - foreach (0..$#{ $pdb->{records}) { + foreach (0..$#{ $pdb->{records} }) { next if $_ == 0 && $pdb->{version} == 4; my $rec = $pdb->{records}->[$_]; my $acct = $pdb->Decrypt($rec); @@ -1524,16 +1528,65 @@ or calculated when setting a new password. }; +=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 + }; + +=item PackRecord + +Reverses ParseRecord and then sends it through Palm::StdAppInfo::PackRecord() + +=back + =head1 DEPENDENCIES Palm::StdAppInfo +B + Digest::MD5 Crypt::DES -Readonly +B +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 @@ -1548,7 +1601,29 @@ 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 Ehoenicke@gmail.comE +(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 + +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 very happy with the data structures used by Encrypt() and +Decrypt() for v5 databases, but I am not sure of a better way. + +The v4 compatibility mode does not insert a fake record 0 where +normally the encrypted password is stored. + +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. I need +to fix all that before it is a 1.0 candidate. Please report any bugs or feature requests to C, or through the web interface at