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package IO::Stream::Crypt::RC4; |
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use warnings; |
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use strict; |
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use Carp; |
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use version; our $VERSION = qv('1.0.3'); # update POD & Changes & README |
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# update DEPENDENCIES in POD & Makefile.PL & README |
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use IO::Stream::const; |
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use Crypt::RC4; |
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sub new { |
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my ($class, $passphrase) = @_; |
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croak 'usage: IO::Stream::Crypt::RC4->new("passphrase")' |
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if !defined $passphrase; |
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my $self = bless { |
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out_buf => q{}, # modified on: OUT |
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out_pos => undef, # modified on: OUT |
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out_bytes => 0, # modified on: OUT |
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in_buf => q{}, # modified on: IN |
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in_bytes => 0, # modified on: IN |
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ip => undef, # modified on: RESOLVED |
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is_eof => undef, # modified on: EOF |
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_rcrypt => Crypt::RC4->new($passphrase), |
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_wcrypt => Crypt::RC4->new($passphrase), |
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}, $class; |
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return $self; |
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} |
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sub PREPARE { |
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my ($self, $fh, $host, $port) = @_; |
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$self->{_slave}->PREPARE($fh, $host, $port); |
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return; |
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} |
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sub WRITE { |
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my ($self) = @_; |
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my $m = $self->{_master}; |
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my $s = substr $m->{out_buf}, $m->{out_pos}||0; |
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my $n = length $s; |
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$self->{out_buf} .= $self->{_wcrypt}->RC4($s); |
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if (defined $m->{out_pos}) { |
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$m->{out_pos} += $n; |
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} else { |
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$m->{out_buf} = q{}; |
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} |
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$m->{out_bytes} += $n; |
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$m->EVENT(OUT); |
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$self->{_slave}->WRITE(); |
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return; |
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} |
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sub EVENT { |
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my ($self, $e, $err) = @_; |
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my $m = $self->{_master}; |
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if ($e & OUT) { |
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$e &= ~OUT; |
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return if !$e && !$err; |
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} |
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if ($e & IN) { |
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$m->{in_buf} .= $self->{_rcrypt}->RC4($self->{in_buf}); |
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$m->{in_bytes} += $self->{in_bytes}; |
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$self->{in_buf} = q{}; |
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$self->{in_bytes}= 0; |
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} |
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if ($e & RESOLVED) { |
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$m->{ip} = $self->{ip}; |
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} |
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if ($e & EOF) { |
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$m->{is_eof} = $self->{is_eof}; |
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} |
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$m->EVENT($e, $err); |
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return; |
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} |
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1; # Magic true value required at end of module |
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__END__ |
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=head1 NAME |
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IO::Stream::Crypt::RC4 - Crypt::RC4 plugin for IO::Stream |
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=head1 VERSION |
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This document describes IO::Stream::Crypt::RC4 version 1.0.3 |
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92
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=head1 SYNOPSIS |
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94
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use IO::Stream; |
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use IO::Stream::Crypt::RC4; |
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IO::Stream->new({ |
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... |
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plugin => [ |
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... |
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rc4 => IO::Stream::Crypt::RC4->new($passphrase), |
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... |
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], |
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}); |
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106
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=head1 DESCRIPTION |
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108
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This module is plugin for L<IO::Stream> which allow you to encrypt all |
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data read/written by this stream using RC4. |
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111
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112
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=head1 INTERFACE |
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114
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=over |
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116
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=item new($passphrase) |
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118
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Create and return new IO::Stream plugin object. |
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120
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=back |
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122
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123
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=head1 DIAGNOSTICS |
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125
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=over |
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127
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=item C<< usage: IO::Stream::Crypt::RC4->new("passphrase") >> |
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129
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You probably called new() without $passphrase parameter. |
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131
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=back |
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133
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134
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=head1 CONFIGURATION AND ENVIRONMENT |
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136
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IO::Stream::Crypt::RC4 requires no configuration files or environment variables. |
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138
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139
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=head1 DEPENDENCIES |
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141
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L<IO::Stream>, |
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L<Crypt::RC4>. |
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144
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145
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=head1 INCOMPATIBILITIES |
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147
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None reported. |
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149
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150
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=head1 BUGS AND LIMITATIONS |
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152
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No bugs have been reported. |
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154
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Please report any bugs or feature requests to author, or |
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C<bug-io-stream-crypt-rc4@rt.cpan.org>, or through the web interface at |
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L<http://rt.cpan.org>. |
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158
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159
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=head1 AUTHOR |
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161
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Alex Efros C<< <powerman-asdf@ya.ru> >> |
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164
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=head1 LICENSE AND COPYRIGHT |
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166
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Copyright (c) 2008, Alex Efros C<< <powerman-asdf@ya.ru> >>. All rights reserved. |
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168
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This module is free software; you can redistribute it and/or |
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modify it under the same terms as Perl itself. See L<perlartistic>. |
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171
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172
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=head1 DISCLAIMER OF WARRANTY |
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174
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BECAUSE THIS SOFTWARE IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY |
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FOR THE SOFTWARE, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN |
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OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES |
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PROVIDE THE SOFTWARE "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER |
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EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE |
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ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE SOFTWARE IS WITH |
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YOU. SHOULD THE SOFTWARE PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL |
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NECESSARY SERVICING, REPAIR, OR CORRECTION. |
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184
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IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING |
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WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR |
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REDISTRIBUTE THE SOFTWARE AS PERMITTED BY THE ABOVE LICENCE, BE |
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LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL, |
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OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE |
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THE SOFTWARE (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING |
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RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A |
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FAILURE OF THE SOFTWARE TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF |
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SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF |
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SUCH DAMAGES. |