/ 
Mail-DKIM-1.20240124
River stage one • 3 direct dependents • 7 total dependents
/ Mail::DKIM::ARC::MessageSignature

NAME

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

VERSION

version 1.20240124

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 <jason@long.name>

  • Marc Bradshaw <marc@marcbradshaw.net>

  • Bron Gondwana <brong@fastmailteam.com> (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.