1Mail::DKIM::SignerPolicUys(e3r)Contributed Perl DocumentMaatiilo:n:DKIM::SignerPolicy(3)
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NAME

6       Mail::DKIM::SignerPolicy - determines signing parameters for a message
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DESCRIPTION

9       A "signer policy" is an object, class, or function used by
10       Mail::DKIM::Signer to determine what signatures to add to the current
11       message. To take advantage of signer policies, create your own Perl
12       class that extends the Mail::DKIM::SignerPolicy class.  The only method
13       you need to implement is the apply() method.
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15       The apply() method takes as a parameter the Mail::DKIM::Signer object.
16       Using this object, it can determine some properties of the message
17       (e.g.  what the From: address or Sender: address is). Then it sets
18       various signer properties as desired. The apply() method should return
19       a nonzero value if the message should be signed. If a false value is
20       returned, then the message is "skipped" (i.e. not signed).
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22       Here is an example of a policy that always returns the same values:
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24         package MySignerPolicy;
25         use base "Mail::DKIM::SignerPolicy";
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27         sub apply
28         {
29             my $self = shift;
30             my $signer = shift;
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32             $signer->algorithm("rsa-sha1");
33             $signer->method("relaxed");
34             $signer->domain("example.org");
35             $signer->selector("selector1");
36             $signer->key_file("private.key");
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38             return 1;
39         }
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41       To use this policy, simply specify the name of the class as the Policy
42       parameter...
43
44         my $dkim = Mail::DKIM::Signer->new(
45                         Policy => "MySignerPolicy",
46                    );
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ADVANCED

49       You can also have the policy actually build the signature for the
50       Signer to use. To do this, call the signer's add_signature() method
51       from within your apply() callback. E.g.,
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53         sub apply
54         {
55             my $self = shift;
56             my $signer = shift;
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58             $signer->add_signature(
59                     new Mail::DKIM::Signature(
60                         Algorithm => $signer->algorithm,
61                         Method => $signer->method,
62                         Headers => $signer->headers,
63                         Domain => $signer->domain,
64                         Selector => $signer->selector,
65                     ));
66             return;
67         }
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69       Again, if you do not want any signatures, return zero or undef. If you
70       use add_signature() to create a signature, the default signature will
71       not be created, even if you return nonzero.
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AUTHOR

74       Jason Long, <jlong@messiah.edu>
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77       Copyright (C) 2006-2007 by Messiah College
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79       This library is free software; you can redistribute it and/or modify it
80       under the same terms as Perl itself, either Perl version 5.8.6 or, at
81       your option, any later version of Perl 5 you may have available.
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85perl v5.10.1                      2009-07-10       Mail::DKIM::SignerPolicy(3)
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