Provided by: libmail-message-perl_3.019-1_all 
NAME
Mail::Message::Field::DKIM - message header field for dkim signatures
INHERITANCE
Mail::Message::Field::DKIM
is a Mail::Message::Field::Structured
is a Mail::Message::Field::Full
is a Mail::Message::Field
is a Mail::Reporter
SYNOPSIS
my $f = Mail::Message::Field->new('DKIM-Signature' => '...');
my $g = Mail::Message::Field->new('DKIM-Signature');
$g->add...
DESCRIPTION
Decode the information contained in a DKIM header. You can also construct DKIM-Signature headers this
way. However, verification and signing is not yet implemented.
This implementation is based on RFC6376.
Extends "DESCRIPTION" in Mail::Message::Field::Structured.
OVERLOADED
Extends "OVERLOADED" in Mail::Message::Field::Structured.
overload: "" stringification
Inherited, see "OVERLOADED" in Mail::Message::Field::Full
overload: 0+ numification
Inherited, see "OVERLOADED" in Mail::Message::Field
overload: <=> numeric comparison
Inherited, see "OVERLOADED" in Mail::Message::Field
overload: bool boolean
Inherited, see "OVERLOADED" in Mail::Message::Field
overload: cmp string comparison
Inherited, see "OVERLOADED" in Mail::Message::Field
METHODS
Extends "METHODS" in Mail::Message::Field::Structured.
Constructors
Extends "Constructors" in Mail::Message::Field::Structured.
$obj->clone()
Inherited, see "Constructors" in Mail::Message::Field
$class->from($field, %options)
Inherited, see "Constructors" in Mail::Message::Field::Full
$class->new($data)
Inherited, see "METHODS" in Mail::Message::Field::Structured
-Option --Defined in --Default
attributes Mail::Message::Field::Structured <ignored>
charset Mail::Message::Field::Full undef
datum Mail::Message::Field::Structured undef
encoding Mail::Message::Field::Full 'q'
force Mail::Message::Field::Full false
language Mail::Message::Field::Full undef
log Mail::Reporter 'WARNINGS'
trace Mail::Reporter 'WARNINGS'
attributes => \@attributes|\%attributes
charset => $charset
datum => $date
encoding => 'q'|'Q'|'b'|'B'
force => BOOLEAN
language => $language
log => LEVEL
trace => LEVEL
Attributes
Extends "Attributes" in Mail::Message::Field::Structured.
$obj->logSettings()
Inherited, see "Attributes" in Mail::Reporter
The field
Extends "The field" in Mail::Message::Field::Structured.
$any->isStructured()
Inherited, see "The field" in Mail::Message::Field
$obj->length()
Inherited, see "The field" in Mail::Message::Field
$obj->nrLines()
Inherited, see "The field" in Mail::Message::Field
$obj->print( [$fh] )
Inherited, see "The field" in Mail::Message::Field
$obj->size()
Inherited, see "The field" in Mail::Message::Field
$obj->string( [$wrap] )
Inherited, see "The field" in Mail::Message::Field
$obj->toDisclose()
Inherited, see "The field" in Mail::Message::Field
Access to the name
Extends "Access to the name" in Mail::Message::Field::Structured.
$obj->Name()
Inherited, see "Access to the name" in Mail::Message::Field
$obj->name()
Inherited, see "Access to the name" in Mail::Message::Field
$obj->wellformedName( [STRING] )
Inherited, see "Access to the name" in Mail::Message::Field
Access to the body
Extends "Access to the body" in Mail::Message::Field::Structured.
$obj->body()
Inherited, see "Access to the body" in Mail::Message::Field
$obj->decodedBody(%options)
Inherited, see "Access to the body" in Mail::Message::Field::Full
$obj->folded()
Inherited, see "Access to the body" in Mail::Message::Field
$obj->foldedBody( [$body] )
Inherited, see "Access to the body" in Mail::Message::Field
$any->stripCFWS( [STRING] )
Inherited, see "Access to the body" in Mail::Message::Field
$obj->unfoldedBody( [$body, [$wrap]] )
Inherited, see "Access to the body" in Mail::Message::Field
Access to the content
Extends "Access to the content" in Mail::Message::Field::Structured.
$obj->addAttribute(...)
Attributes are not supported here.
$obj->addTag($name, $value|@values)
Add a tag to the set. When the tag already exists, it is replaced. Names are (converted to) lower-
case. When multiple values are given, they will be concatenated with a blank (and may get folded
there later)
$obj->addresses()
Inherited, see "Access to the content" in Mail::Message::Field
$obj->attrPairs()
Inherited, see "Access to the content" in Mail::Message::Field::Structured
$obj->attribute( $object|<STRING, %options>|<$name,$value,%options> )
Inherited, see "Access to the content" in Mail::Message::Field::Structured
$obj->attributes()
Inherited, see "Access to the content" in Mail::Message::Field::Structured
$obj->beautify()
Inherited, see "Access to the content" in Mail::Message::Field::Full
$obj->comment( [STRING] )
Inherited, see "Access to the content" in Mail::Message::Field
$any->createComment(STRING, %options)
Inherited, see "Access to the content" in Mail::Message::Field::Full
$any->createPhrase(STRING, %options)
Inherited, see "Access to the content" in Mail::Message::Field::Full
$obj->study()
Inherited, see "Access to the content" in Mail::Message::Field
$obj->tag($name)
Returns the value for the named tag.
$any->toDate( [$time] )
Inherited, see "Access to the content" in Mail::Message::Field
$obj->toInt()
Inherited, see "Access to the content" in Mail::Message::Field
DKIM-Signature tags
The tag methods return the tag-value content without any validation or modification. For many
situations, the actual content does not need (expensive) validation and interpretation.
$obj->tagAgentID()
The Agent or User Identifier (AUID). Defaults to @$domain
$obj->tagAlgorithm()
Signature algorithm. Should be rsa-sha(1|256): check before use. Required.
$obj->tagBodyLength()
The number of octets which where used to calculate the hash. By default, the whole body was used.
$obj->tagC14N()
The canonicalization method used. Defaults to 'simple/simple'.
$obj->tagDomain()
The sub-domain (SDID) which claims responsibility for this signature. Required.
$obj->tagExpires()
The timestamp when the signature will expire. Recommended.
$obj->tagExtract()
Some headers from the original message packed together.
$obj->tagQueryMethods()
A colon-separated list of method which can be used to retrieve the public key. The default is
"dns/txt" (currently the only valid option)
$obj->tagSelector()
The selector subdividing the domain tag. Required.
$obj->tagSignData()
$obj->tagSignature()
Message signature in base64, with whitespaces removed. Required.
$obj->tagSignedHeaders()
The colon separated list of headers which need to be included in the signature. Required.
$obj->tagTimestamp()
When the signature was created in UNIX-like seconds (since 1970). Recommended.
$obj->tagVersion()
Signature header syntax version (usually 1)
Other methods
Extends "Other methods" in Mail::Message::Field::Structured.
$any->dateToTimestamp(STRING)
Inherited, see "Other methods" in Mail::Message::Field
Internals
Extends "Internals" in Mail::Message::Field::Structured.
$obj->consume( $line | <$name,<$body|$objects>> )
Inherited, see "Internals" in Mail::Message::Field
$any->decode(STRING, %options)
Inherited, see "Internals" in Mail::Message::Field::Full
$obj->defaultWrapLength( [$length] )
Inherited, see "Internals" in Mail::Message::Field
$obj->encode(STRING, %options)
Inherited, see "Internals" in Mail::Message::Field::Full
$any->fold( $name, $body, [$maxchars] )
Inherited, see "Internals" in Mail::Message::Field
$obj->setWrapLength( [$length] )
Inherited, see "Internals" in Mail::Message::Field
$obj->stringifyData(STRING|ARRAY|$objects)
Inherited, see "Internals" in Mail::Message::Field
$obj->unfold(STRING)
Inherited, see "Internals" in Mail::Message::Field
Parsing
Extends "Parsing" in Mail::Message::Field::Structured.
$any->consumeComment(STRING)
Inherited, see "Parsing" in Mail::Message::Field::Full
$obj->consumeDotAtom(STRING)
Inherited, see "Parsing" in Mail::Message::Field::Full
$any->consumePhrase(STRING)
Inherited, see "Parsing" in Mail::Message::Field::Full
$obj->datum( [$value] )
Inherited, see "Parsing" in Mail::Message::Field::Structured
$obj->parse(STRING)
Inherited, see "Parsing" in Mail::Message::Field::Full
$obj->produceBody()
Inherited, see "Parsing" in Mail::Message::Field::Full
Error handling
Extends "Error handling" in Mail::Message::Field::Structured.
$obj->AUTOLOAD()
Inherited, see "Error handling" in Mail::Reporter
$obj->addReport($object)
Inherited, see "Error handling" in Mail::Reporter
$any->defaultTrace( [$level]|[$loglevel, $tracelevel]|[$level, $callback] )
Inherited, see "Error handling" in Mail::Reporter
$obj->errors()
Inherited, see "Error handling" in Mail::Reporter
$any->log( [$level, [$strings]] )
Inherited, see "Error handling" in Mail::Reporter
$any->logPriority($level)
Inherited, see "Error handling" in Mail::Reporter
$obj->notImplemented()
Inherited, see "Error handling" in Mail::Reporter
$obj->report( [$level] )
Inherited, see "Error handling" in Mail::Reporter
$obj->reportAll( [$level] )
Inherited, see "Error handling" in Mail::Reporter
$obj->trace( [$level] )
Inherited, see "Error handling" in Mail::Reporter
$obj->warnings()
Inherited, see "Error handling" in Mail::Reporter
Cleanup
Extends "Cleanup" in Mail::Message::Field::Structured.
$obj->DESTROY()
Inherited, see "Cleanup" in Mail::Reporter
DETAILS
Extends "DETAILS" in Mail::Message::Field::Structured.
DIAGNOSTICS
Warning: Field content is not numerical: $content
The numeric value of a field is requested (for instance the "Lines" or "Content-Length" fields should
be numerical), however the data contains weird characters. Cast by toInt()
Error: Field name too long (max $length), in '$name'
It is not specified in the RFCs how long a field name can be, but at least it should be a few
characters shorter than the line wrap. Cast by fold()
Warning: Illegal character in charset '$charset'
The field is created with an utf8 string which only contains data from the specified character set.
However, that character set can never be a valid name because it contains characters which are not
permitted. Cast by encode()
Warning: Illegal character in field name $name
A new field is being created which does contain characters not permitted by the RFCs. Using this
field in messages may break other e-mail clients or transfer agents, and therefore mutulate or
extinguish your message. Cast by consume()
Warning: Illegal character in language '$lang'
The field is created with data which is specified to be in a certain language, however, the name of
the language cannot be valid: it contains characters which are not permitted by the RFCs. Cast by
encode()
Warning: Illegal encoding '$encoding', used 'q'
The RFCs only permit base64 ("b " or "B ") or quoted-printable ("q" or "Q") encoding. Other than
these four options are illegal. Cast by encode()
Error: No attributes for DKIM headers
Is is not possible to add attributes to this field. Cast by addAttribute()
Error: Package $package does not implement $method.
Fatal error: the specific package (or one of its superclasses) does not implement this method where
it should. This message means that some other related classes do implement this method however the
class at hand does not. Probably you should investigate this and probably inform the author of the
package. Cast by notImplemented()
SEE ALSO
This module is part of Mail-Message version 3.019, built on November 24, 2025. Website:
http://perl.overmeer.net/CPAN/
LICENSE
For contributors see file ChangeLog.
This software is copyright (c) 2001-2025 by Mark Overmeer.
This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5
programming language system itself.
perl v5.40.1 2025-12-07 Mail::Message::Field::DKIM(3pm)