Mail::DKIM::Algorithm::Base(3) base class for DKIM algorithms

SYNOPSIS


my $algorithm = new Mail::DKIM::Algorithm::rsa_sha1(
Signature => $dkim_signature
);
# add headers
$algorithm->add_header("Subject: this is the subject\015\012");
$algorithm->finish_header;
# add body
$algorithm->add_body("This is the body.\015\012");
$algorithm->add_body("Another line of the body.\015\012");
$algorithm->finish_body;
# now sign or verify...
# TODO...

CONSTRUCTOR

You should not create an object of this class directly. Instead, use one of the DKIM algorithm implementation classes, such as rsa_sha1:

  my $algorithm = new Mail::DKIM::Algorithm::rsa_sha1(
                      Signature => $dkim_signature
                  );

METHODS

add_body() - feeds part of the body into the algorithm/canonicalization

  $algorithm->add_body("This is the body.\015\012");
  $algorithm->add_body("Another line of the body.\015\012");

The body should be fed one ``line'' at a time.

add_header() - feeds a header field into the algorithm/canonicalization

  $algorithm->add_header("Subject: this is the subject\015\012");

The header must start with the header field name and continue through any folded lines (including the embedded <CRLF> sequences). It terminates with the <CRLF> at the end of the header field.

finish_body() - signals the end of the message body

  $algorithm->finish_body

Call this method when all lines from the body have been submitted. After calling this method, use sign() or verify() to get the results from the algorithm.

finish_header() - signals the end of the header field block

  $algorithm->finish_header;

Call this method when all the headers have been submitted.

sign() - generates a signature using a private key

  $base64 = $algorithm->sign($private_key);

signature() - get/set the signature worked on by this algorithm

  my $old_signature = $algorithm->signature;
  $algorithm->signature($new_signature);

verify() - verifies a signature

  $result = $algorithm->verify();

Must be called after finish_body().

The result is a true/false value: true indicates the signature data is valid, false indicates it is invalid.

For an invalid signature, details may be obtained from $algorithm->{verification_details} or [email protected]

AUTHOR

Jason Long, <[email protected]>

COPYRIGHT AND LICENSE

Copyright (C) 2005-2007 by Messiah College

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself, either Perl version 5.8.6 or, at your option, any later version of Perl 5 you may have available.