1Mail::DKIM::CanonicalizUasteironC:o:nBtarsieb(u3t)ed PerMlaiDlo:c:uDmKeInMt:a:tCiaonnonicalization::Base(3)
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NAME

6       Mail::DKIM::Canonicalization::Base - base class for canonicalization
7       methods
8

VERSION

10       version 1.20220520
11

SYNOPSIS

13         # canonicalization results get output to STDOUT
14         my $method = new Mail::DKIM::Canonicalization::relaxed(
15                           output_fh => *STDOUT,
16                           Signature => $dkim_signature);
17
18         # add headers
19         $method->add_header("Subject: this is the subject\015\012");
20         $method->finish_header(Headers => \@all_headers);
21
22         # add body
23         $method->add_body("This is the body.\015\012");
24         $method->add_body("Another two lines\015\012of the body.\015\012");
25         $method->finish_body;
26
27         # this adds the signature to the end
28         $method->finish_message;
29

CONSTRUCTOR

31       Use the new() method of the desired canonicalization implementation
32       class to construct a canonicalization object. E.g.
33
34         my $method = new Mail::DKIM::Canonicalization::relaxed(
35                           output_fh => *STDOUT,
36                           Signature => $dkim_signature);
37
38       The constructors accept these arguments:
39
40       Signature
41           (Required) Provide the DKIM signature being constructed (if the
42           message is being signed), or the DKIM signature being verified (if
43           the message is being verified). The canonicalization method either
44           writes parameters to the signature, or reads parameters from the
45           signature (e.g. the h= tag).
46
47       output
48           If specified, the canonicalized message will be passed to this
49           object with the PRINT method.
50
51       output_digest
52           If specified, the canonicalized message will be added to this
53           digest.  (Uses the add() method.)
54
55       output_fh
56           If specified, the canonicalized message will be written to this
57           file handle.
58
59       If none of the output parameters are specified, then the canonicalized
60       message is appended to an internal buffer. The contents of this buffer
61       can be accessed using the result() method.
62

METHODS

64   add_body() - feeds part of the body into the canonicalization
65         $method->add_body("This is the body.\015\012");
66         $method->add_body("Another two lines\015\012of the body.\015\012");
67
68       The body should be fed one or more "lines" at a time.  I.e. do not feed
69       part of a line.
70
71   finish_header() - called when the header has been completely parsed
72         $method->finish_header(Headers => \@all_headers);
73
74       Formerly the canonicalization object would only get the header data
75       through successive invocations of add_header(). However, that required
76       the canonicalization object to store a copy of the entire header so
77       that it could choose the order in which headers were fed to the digest
78       object. This is inefficient use of memory, since a message with many
79       signatures may use many canonicalization objects and each
80       canonicalization object has its own copy of the header.
81
82       The headers array is an array of one element per header field, with the
83       headers not processed/canonicalized in any way.
84
85   result()
86         my $result = $method->result;
87
88       If you did not specify an object or handle to send the output to, the
89       result of the canonicalization is stored in the canonicalization method
90       itself, and can be accessed using this method.
91

SEE ALSO

93       Mail::DKIM
94

AUTHORS

96       •   Jason Long <jason@long.name>
97
98       •   Marc Bradshaw <marc@marcbradshaw.net>
99
100       •   Bron Gondwana <brong@fastmailteam.com> (ARC)
101

THANKS

103       Work on ensuring that this module passes the ARC test suite was
104       generously sponsored by Valimail (https://www.valimail.com/)
105

107       •   Copyright (C) 2013 by Messiah College
108
109       •   Copyright (C) 2010 by Jason Long
110
111       •   Copyright (C) 2017 by Standcore LLC
112
113       •   Copyright (C) 2020 by FastMail Pty Ltd
114
115       This library is free software; you can redistribute it and/or modify it
116       under the same terms as Perl itself, either Perl version 5.8.6 or, at
117       your option, any later version of Perl 5 you may have available.
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121perl v5.36.0                      2022-07-M2a2il::DKIM::Canonicalization::Base(3)
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