[Bug 1715010] Re: Fix XTS encryption with FIPS enabled kernels

[Joy Latten]

Hi, I installed the proposed cryptsetup and ran the common criteria
testcases for cryptsetup, that before had failed. My environment
includes the fips-supported kernel and modules. With the new cryptsetup,
all the common criteria cryptsetup testcases passed.

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https://bugs.launchpad.net/bugs/1715010

Title:
  Fix XTS encryption with FIPS enabled kernels

Status in cryptsetup package in Ubuntu:
  Fix Committed
Status in cryptsetup source package in Xenial:
  Fix Committed

Bug description:
  SRU Justification:

  Impact:  The kernel crypto API rejects weak XTS keys in FIPS mode and
  the current version of cryptsetup in xenial do some tests with a
  zeroed key to check cipher availability in the kernel. These two
  behaviors combined make impossible to use disk encryption with XTS
  while using a kernel in FIPS mode.

  Fix: apply the following fix to cryptsetup:

  https://gitlab.com/cryptsetup/cryptsetup/commit/3c2135b36bbc52d052e4ced7c94dc4981eb07a53

  Testcase: Try to setup disk encryption with XTS while the kernel is in
  FIPS mode.

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