how about this? offers 3-way "encryption"...
#!/usr/bin/perl
use warnings;
use strict;
use Getopt::Std;
my %opt;
usage() unless (getopts('rRcCaA', \%opt));
usage() unless @ARGV;
if($opt{'r'} || $opt{'R'}) {
while(<>) {
tr/a-zA-Z/n-za-mN-ZA-M/;
print;
}
} elsif($opt{'c'}) {
while(<>) {
tr/a-zA-Z/d-za-cD-ZA-C/;
print;
}
} elsif($opt{'C'}) {
while(<>) {
tr/d-za-cD-ZA-C/a-zA-Z/;
print;
}
} elsif($opt{'a'}) {
while(my $line = <>) {
@_ = split//, $line;
map { print ord($_), " "; } @_;
print "\n";
}
} elsif($opt{'A'}) {
while(my $line = <>) {
@_ = split/ /, $line;
map { print chr($_); } @_;
print "\n";
}
}
sub usage {
print << "__END__";
-c = encrypt with Caesar encryption
-C = decrypt from Caesar encryption
-r = encrypt with rot13
-R = decrypt from rot13
-a = encrypt to numerical equivalent
-A = decrypt back to ASCII
example using files:
perl $0 -r plain.txt
perl $0 -C encrypted.txt
example using STDIN:
perl $0 -r <ENTER, type text>
__END__
exit 1;
}
-
Are you posting in the right place? Check out Where do I post X? to know for sure.
-
Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
<blockquote> <br /> <dd>
<dl> <dt> <em> <font>
<h1> <h2> <h3> <h4>
<h5> <h6> <hr /> <i>
<li> <nbsp> <ol> <p>
<small> <strike> <strong>
<sub> <sup> <table>
<td> <th> <tr> <tt>
<u> <ul>
-
Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).
-
Want more info? How to link
or How to display code and escape characters
are good places to start.
|