Mail::DKIM::ARC::MessageSignature - Subclass of Mail::DKIM::Signature which represents a ARC-Message-Signature header

NAME  VERSION  CONSTRUCTORS  new() − create a new signature from parameters  instance() − get or set the signing instance (i=) field  SEE ALSO  AUTHORS  THANKS  COPYRIGHT AND LICENSE 

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NAME

Mail::DKIM::ARC::MessageSignature − Subclass of Mail::DKIM::Signature which represents a ARC−Message−Signature header

VERSION

version 1.20230911

CONSTRUCTORS

new() − create a new signature from parameters

my $signature = Mail::DKIM::ARC::MessageSignature−>new(
[ Algorithm => 'rsa−sha256', ]
[ Signature => $base64, ]
[ Method => 'relaxed', ]
[ Domain => 'example.org', ]
[ Instance => 1, ]
[ Headers => 'from:subject:date:message−id', ]
[ Query => 'dns', ]
[ Selector => 'alpha', ]
[ Timestamp => time(), ]
[ Expiration => time() + 86400, ]
);

The only differences between this module and Mail::DKIM::Signature are the header name, and that ’instance’ is an integer rather than a base64 encoded value.

instance() − get or set the signing instance (i=) field

my $i = $signature−>instance;

Instances must be integers less than 1024 according to the spec.

NOTE: the i= field is "Identity" in DKIM and is a base64 value, but in ARC it is "Instance" and an integer. The parsing routine does not check that the i= value is a number.

SEE ALSO

Mail::DKIM::Signature for DKIM-Signature headers

AUTHORS

	•		Jason Long <[email protected]>
	•		Marc Bradshaw <[email protected]>
	•		Bron Gondwana <[email protected]> (ARC)

THANKS

Work on ensuring that this module passes the ARC test suite was generously sponsored by Valimail (https://www.valimail.com/)

COPYRIGHT AND LICENSE

	•		Copyright (C) 2013 by Messiah College
	•		Copyright (C) 2010 by Jason Long
	•		Copyright (C) 2017 by Standcore LLC
	•		Copyright (C) 2020 by FastMail Pty Ltd

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.

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