This file summarizes what's changed between releases of Mail-DKIM.
See the ChangeLog file for the details.
Version 0.44
 * Added experimental support for ARC
Version 0.43
 * Update tests for new DNS setup
Version 0.42
  * Fix tests failing due to dns changes elsewhere
  * Moved sample_mime_lite.pl to scripts directory
Version 0.41
  * Fix to better comply with DKIM specification:
    * DKIM signatures with multiple methods specified in q= tag are now
      accepted. Such signatures are not known to appear in real life.
      (rt.cpan.org issue #83176)
  * Allow greater control over which headers are signed by Signer
    * Added the extended_headers() method to allow headers
      to be oversigned, or skipped.
  * bugfixes:
    * PrivateKey file is now closed correctly after being read.
    * Use lexical rather than named file handle
Version 0.40 - released 2013-02-07
  * New/changed functionality:
    * a single DNS resolver is created for the lifetime of the program,
      rather than reinitializing the resolver for each new query.
  * bugfixes:
    * fix the error message given when an invalid algorithm is
      specified in the construction of Mail::DKIM::Signer.
    * avoid Perl warning about use of an undefined value in several
      places (rt.cpan.org issue #82913).
    * speed- improved performance of parsing the message into lines
      (rt.cpan.org issue #77902). Patch by Mark Martinec.
    * fix DNS queries to use the correct method (txtdata) of Net::DNS
      (rt.cpan.org issue #83170). Patch by Mark Martinec.
  * API changes:
    * global subroutines resolver() or enable_EDNS0() in module
      Mail::DKIM::DNS can be called to specify non-default options
      to Net::DNS::Resolver (see also rt.cpan.org issue #80425).
Version 0.39 - released 2010-11-14
  * bugfixes:
    * fix issue with getting wrong error codes when q= tag is empty
      (issue #3011005)
    * anti-abuse- prevent a message with thousands of signatures from
      thrashing the whole computer (issue #3010997)
    * memory usage- significantly reduced memory footprint for
      processing a message with a large header and many signatures
    * fix error message given when no KeyFile has been specified
      (issue #1889690)
  * API changes:
    * the Canonicalization::finish_header() method now expects a
      argument to be passed to it. In the unusual case that you are
      using this method from your own code, please update your code.
Version 0.38 - released 2010-03-31
  * New/changed functionality:
    * DNS lookups can now be started asynchronously; the queries are
      created as the header is parsed; the results are not actually
      needed until the entire message has been read. (The Mail::DKIM
      module does not yet do the queries asynchrously; this is just
      the infrastructure so that the queries can be asynchronous in
      the future.)
  * bugfixes:
    * DNS lookup overrides alarm() signal (issue #2854325)
  * documentation updates:
    * document use of custom PrivateKey object, for external signing
    * describe how to get "pretty signatures" in Signer.pm
Version 0.37 - released 2009-09-08
  * New/changed functionality:
    * ADSP records now check whether the domain itself exists, in
      accordance to the ADSP specification
  * bugfixes:
    * fixed regexp used to detect header field names (issue #2803465)
    * various fixes to ADSP checking
Version 0.36 - released 2009-06-02
  * API changes:
    * restore the as_string() method which was accidentally removed
      in version 0.34
Version 0.35 - released 2009-05-22
  * bugfixes:
    * fixed a runaway regular expression in the canonicalization
      routines (patch provided by Mark Martinec)
Version 0.34 - released 2009-05-20
  * New/changed functionality:
    * support for ADSP (author-domain-signing-practices) records
    * removed support for pre-standardized DKIM signatures (i.e. these
      are DKIM signatures without a v= or bh= tag).
    * DNS resolver errors are detected and reported as such
  * API changes:
    * renamed Mail::DKIM::Policy to Mail::DKIM::DkPolicy. Programs using
      the former name to create policy objects directly (though it would
      be more expected to fetch the objects through
      Mail::DKIM::Verifier) should update their code
    * new policies() method in Mail::DKIM::Verifier for fetching all
      applicable sender/author signing policies
  * bugfixes:
    * Signer object would die if first line of input wasn't a header
      (rt.cpan.org issue #46179)
Version 0.33 - released 2009-03-10
  * bugfixes:
    * signature wrapping would sometimes cause improper preparation of
      DKIM signatures, with "simple" canonicalization (issue #2257046)
  * test scripts:
    * the included corpus is now verified using a fake-DNS resolver,
      which means the test corpus can validate even when your DNS
      servers are really slow
Version 0.32 - released 2008-06-03
  * removed requirement for Digest::SHA1 (issue #1832549).
    We now use the more capable Digest::SHA module for SHA-1 and SHA-256.
  * bugfixes:
    * granularity checking should be case-sensitive (issue #1938112).
    * identity tag now uses quoted-printable encoding (issue #1839015).
  * API improvement:
    * implemented identity_source() for DkSignature objects 
Version 0.31 - released 2008-04-14
  * some error detail messages were changed (see ChangeLog, 2008-01-10 entry)
  * by default, and when possible, DKIM signatures now omit c= and q= tags
    (they are optional tags) (issue #1878518)
  * DKIM and DomainKey signatures are now wrapped so that line breaks
    occur before colon (':') separators instead of after; this avoids
        confusing some broken MUAs (issue #1868648)
  * bugfixes:
    * "undef value" error when DKIM signature appears at end of header
      (issue #1878954)
    * use proper regexp for splitting email address (issue #1878994)
  * API improvements:
    * can specify a domain for fetch_author_policy() (issue #1879197)
    * can access a signature's public-key object (issue #1879215)
    * can specify an OpenSSL-private-key object for PrivateKey->new()
      (issue #1879209)
Version 0.30.1 - released 2008-01-24
 * bugfix:
   * email from cisco.com was failing to verify (issue #1878523)
Version 0.30 - released 2008-01-10
 * includes speed-up optimizations by Mark Martinec
 * DomainKeys, implement proper identity matching...
   a DomainKey-Signature's domain should match the From/Sender address
 * several more test cases
 * API improvements:
   * accept additional arguments when creating Signer/Signature
 * bugfixes:
   * DomainKey-Signature headers were not "prettified"
   * granularity ending with '*' was not checked correctly
   * DomainKey-Signature granularity was checked against the wrong value
Version 0.29 - released 2007-11-08
 * verifiers can now access all parsed signatures and their results,
   not just signatures that were fully tested
 * signer policies can now specify what private key file to use
 * some other minor API improvements
 * bugfixes:
   * for DomainKeys signatures, fixed a compatibility issue handling
     the h= tag
   * for DKIM, signature expirations had been ignored
   * for DKIM, signature identities did not have to match the domain
   * for DKIM, public key granularity field had been ignored
Version 0.28 - released 2007-07-31
 * fixed a bug with line-wrapping a signature at the wrong place
Version 0.27 - released 2007-07-25
 * Sender signing policies are now better implemented
 * Both Yahoo! DomainKeys signing policies and the under-development
   IETF DKIM signing policies are supported
    * Yahoo! DomainKeys policies can protect the Sender: header
    * DKIM signing policies can protect the From: header
   Look at Mail::DKIM::Verifier's fetch_author_policy() and
   fetch_sender_policy() methods for hints.
    
Version 0.26 - released 2007-05-24
 * recognize and generate v=1 signatures (DKIM is now RFC 4871)
Version 0.25 - released 2007-05-10
 * we now only sign headers that IETF recommends for signing
 * it's now possible to "prettify" outgoing signatures, but this feature
   is not enabled by default. To enable, do a "use Mail::DKIM::TextWrap"
   in your program that signs messages. (This may change in a future
   release.)
Version 0.24 - released 2007-03-13
 * fixes two bugs, see ChangeLog for details
 * fixed a bug with public keys (in DNS) containing linebreak characters
 * fixed a bug with DKIM signatures not including the optional q= tag
Version 0.23 - released 2007-02-22
 * fixes some issues with verifying DomainKeys signatures
 * generate newer-style DKIM signatures (with v=0.5 tag)
 * fixed some bugs related to handling messages with no body
 * improved diagnostic messages for certain cases
Version 0.22 - released 2007-01-19
 * fixes a couple very minor bugs
 * some cosmetic changes to error messages
Version 0.21 - released 2006-11-29
 * fixes two bugs, see ChangeLog for details
Version 0.20 - released 2006-10-24
 * now supports verifying multiple signatures (the result returned is based
   on the "best" available signature)
 * now supports adding multiple signatures in one pass (to use this, you
   need to create a "signer policy"; see scripts/dkimsign.pl for an example)
 * now supports signing/verifying signatures for the older DomainKeys standard
 * now implements Internet Draft draft-ietf-dkim-base-05, including:
   * support for the version (v=) tag
 * eliminated "control character detected in message" error message
Version 0.19 - released 2006-06-15
 * now supports earlier versions of Perl (5.6.1 and up).
Version 0.18 - released 2006-06-09
 * no longer depends on Crypt::RSA or Crypt::OpenSSL::Bignum.
Version 0.17 - released 2006-05-26
 * now implements Internet Draft draft-ietf-dkim-base-01, including:
   * support for the body hash (bh=) tag
   * support for SHA256 digests (uses the Digest::SHA module from CPAN)
 * if a message fails to verify, it now distinguishes between:
   * headers having been altered
   * body having been altered
   * RSA key failure (i.e. the signing key does not match the public key)
 * added several sample messages to test against when doing `make test'.
Version 0.16 - released 2006-03-03
 * first version for CPAN; implements draft-allman-dkim-base-01.