tree 2efe1a77545ea3e44a850fbdf82a0bbbf8ae591e
parent ec923e6c6190c7b2cc2a12c207071e2cfaeee7d8
author Stephan Erb <serb@apache.org> 1507481964 +0200
committer Stephan Erb <serb@apache.org> 1507481964 +0200

Switch packaging release checksum to sha512

For our releases we will now be using .sha512 files rather than .sha files
containing sha1 checksums. This change is triggered by a recent update of
the Apache Release Distribution Policy.

Please see this mail for details:

```
Hi PMC,

    The Release Distribution Policy[1] changed regarding .sha files.
    See under "Cryptographic Signatures and Checksums Requirements" [2].

   Old policy :

     -- use extension .sha for any SHA checksum (SHA-1, SHA-256, SHA-512)

   New policy :

      -- use .sha1 for a SHA-1 checksum
      -- use .sha256 for a SHA-256 checksum
      -- use .sha512 for a SHA-512 checksum
      -- [*] .sha should contain a SHA-1

   Why this change ?

      -- Verifying a checksum under the old policy is/was not handy.
         You have to inspect the .sha to find out which algorithm
         should be used ; or try them all (SHA-1, SHA256, etc).
         The new scheme avoids this ambiguity.
      -- The last point[*] was only added for clarity. Most of the
         old, stale .sha's contain a SHA-1. The relatively new .sha's
         contain a SHA-512. The expectation is that the last catagory will
         disappear, when active projects adapt to the 'new' convention.

   Impact :

      -- Should be none ; many projects already use the 'new' convention.
      -- Please ask your release managers to use .sha1, .sha256, .sha512
         instead of the .sha extension.
      -- Please fix your build-tools if you have any.

   Piggyback :

      -- The policy requires a .md5 for every package ;
         providing a .sha512 is recommended.
         Since MD5 is essentially broken, it is to be expected that
         in the future a .sha512 will be required.
         Perhaps it is wize to start providing .sha512's
         with your releases if you do not already do so.

      -- Visit http://mirror-vm.apache.org/checker/
         to check the health of your /dist/-area ;
         my stuff ; any feedback is most welcome.

   Thanks ; regards,

   Henk Penning

    [1] http://www.apache.org/dev/release-distribution
    [2] http://www.apache.org/dev/release-distribution#sigs-and-sums
```

Reviewed at https://reviews.apache.org/r/62831/