[Bug 1208285] Re: Official Ubuntu ISO should use isomd5sum for embedded checksum

[Dmitrijs Ledkovs]

** Package changed: ubiquity (Ubuntu) => ubuntu-cdimage

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https://bugs.launchpad.net/bugs/1208285

Title:
  Official Ubuntu ISO should use isomd5sum for embedded checksum

Status in Ubuntu CD image build software:
  New

Bug description:
  The Ubuntu ISO and official derivatives could contain embedded MD5
  checksums at the iso9660 metadata layer by using isomd5sum tools to
  implant and check the checksum. This may be faster than checking each
  package at the file system level because the verification process when
  done at the block level is a single linear seek without having to jump
  around. The checksum can even be verified after the image has been
  burned and mounted.

  From the tool's README:

      isomd5sum provides a way of making use of the ISO9660 application data
      area to store md5sum data about the iso.  This allows you to check the
      iso given nothing more than the iso itself.

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