/usr/share/perl5/MIME/Decoder/BinHex.pm is in libmime-tools-perl 5.502-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 | package MIME::Decoder::BinHex;
=head1 NAME
MIME::Decoder::BinHex - decode a "binhex" stream
=head1 SYNOPSIS
A generic decoder object; see L<MIME::Decoder> for usage.
Also supports a preamble() method to recover text before
the binhexed portion of the stream.
=head1 DESCRIPTION
A MIME::Decoder subclass for a nonstandard encoding whereby
data are binhex-encoded. Common non-standard MIME encodings for this:
x-uu
x-uuencode
=head1 SEE ALSO
L<MIME::Decoder>
=head1 AUTHOR
Julian Field (F<mailscanner@ecs.soton.ac.uk>).
All rights reserved. This program is free software; you can redistribute
it and/or modify it under the same terms as Perl itself.
=cut
require 5.002;
use vars qw(@ISA $VERSION);
use MIME::Decoder;
use MIME::Tools qw(whine);
use Convert::BinHex;
@ISA = qw(MIME::Decoder);
# The package version, both in 1.23 style *and* usable by MakeMaker:
$VERSION = "5.502";
#------------------------------
#
# decode_it IN, OUT
#
sub decode_it {
my ($self, $in, $out) = @_;
my ($mode, $file);
my (@preamble, @data);
my $H2B = Convert::BinHex->hex2bin;
my $line;
$self->{MDU_Preamble} = \@preamble;
$self->{MDU_Mode} = '600';
$self->{MDU_File} = undef;
### Find beginning...
local $_;
while (defined($_ = $in->getline)) {
if (/^\(This file must be converted/) {
$_ = $in->getline;
last if /^:/;
}
push @preamble, $_;
}
die("binhex decoding: fell off end of file\n") if !defined($_);
### Decode:
my $data;
$data = $H2B->next($_); # or whine("Next error is $@ $!\n");
my $len = unpack("C", $data);
while ($len > length($data)+21 && defined($line = $in->getline)) {
$data .= $H2B->next($line);
}
if (length($data) >= 22+$len) {
$data = substr($data, 22+$len);
} else {
$data = '';
}
$out->print($data);
while (defined($_ = $in->getline)) {
$line = $_;
$data = $H2B->next($line);
$out->print($data);
last if $line =~ /:$/;
}
1;
}
#------------------------------
#
# encode_it IN, OUT
#
sub encode_it {
my ($self, $in, $out) = @_;
my $line;
my $buf = '';
my $fname = (($self->head &&
$self->head->mime_attr('content-disposition.filename')) ||
'');
my $B2H = Convert::BinHex->bin2hex;
$out->print("(This file must be converted with BinHex 4.0)\n");
# Sigh... get length of file
$in->seek(0, 2);
my $datalen = $in->tell();
$in->seek(0, 0);
# Build header in core:
my @hdrs;
my $flen = length($fname);
push @hdrs, pack("C", $flen);
push @hdrs, pack("a$flen", $fname);
push @hdrs, pack('C', 4);
push @hdrs, pack('a4', '????');
push @hdrs, pack('a4', '????');
push @hdrs, pack('n', 0);
push @hdrs, pack('N', $datalen);
push @hdrs, pack('N', 0); # Resource length
my $hdr = join '', @hdrs;
# Compute the header CRC:
my $crc = Convert::BinHex::binhex_crc("\000\000",
Convert::BinHex::binhex_crc($hdr, 0));
# Output the header (plus its CRC):
$out->print($B2H->next($hdr . pack('n', $crc)));
while ($in->read($buf, 1000)) {
$out->print($B2H->next($buf));
}
$out->print($B2H->done);
1;
}
#------------------------------
#
# last_preamble
#
# Return the last preamble as ref to array of lines.
# Gets reset by decode_it().
#
sub last_preamble {
my $self = shift;
return $self->{MDU_Preamble} || [];
}
#------------------------------
#
# last_mode
#
# Return the last mode.
# Gets reset to undef by decode_it().
#
sub last_mode {
shift->{MDU_Mode};
}
#------------------------------
#
# last_filename
#
# Return the last filename.
# Gets reset by decode_it().
#
sub last_filename {
shift->{MDU_File} || undef; #[];
}
#------------------------------
1;
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