[Bug 1781912] Re: [18.10 FEAT] Upgrade cryptsetup >= 2.0.3

[Frank Heimes]

It looks like the best (if not even the only feasible) way to get the
required functionality from cryptsetup 2.0.3 that is needed for
'Pervasive encryption support' back to the bionic package is by
specifying the a list of the needed commits - sorry to say that...

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Title:
  [18.10 FEAT] Upgrade cryptsetup >= 2.0.3

Status in Ubuntu on IBM z Systems:
  Triaged
Status in cryptsetup package in Ubuntu:
  Fix Released

Bug description:
  Cryptsetup is utility used to conveniently setup disk encryption based
  on DMCrypt kernel module.

  These include plain dm-crypt volumes, LUKS volumes, loop-AES
  and TrueCrypt (including VeraCrypt extension) format.

  Project also includes veritysetup utility used to conveniently setup
  DMVerity block integrity checking kernel module
  and, since version 2.0,  integritysetup to setup
  DMIntegrity block integrity kernel module.

  Version 2.0.3 include all z code for dm-crypt with protected keys

  Without cryptsetup 2.0.3 (the 3 is important) we won't be able to use
  secure key encryption with LUKS2 and the paes cipher. Only plain mode
  will be usable with cryptsetup version 2.0.1.

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