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

[Kip Warner]

Public bug reported:

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.

** Affects: ubiquity (Ubuntu)
     Importance: Undecided
         Status: New

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

Title:
  Official Ubuntu ISO should use isomd5sum for embedded checksum

Status in “ubiquity” package in Ubuntu:
  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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