[Bug 1643708] Re: Add SPNEGO special case for NTLMSSP+MechListMIC

[Joshua R. Poulson]

The test case in
https://github.com/krb5/krb5/pull/436#issuecomment-209017277 is the best
we can offer without going through the trouble of setting up OMI. We are
happy to test any preliminary builds, or -proposed, as necessary.

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https://bugs.launchpad.net/bugs/1643708

Title:
  Add SPNEGO special case for NTLMSSP+MechListMIC

Status in krb5 package in Ubuntu:
  Fix Released
Status in krb5 source package in Trusty:
  Incomplete
Status in krb5 source package in Xenial:
  Incomplete
Status in krb5 source package in Yakkety:
  Incomplete

Bug description:
  MS-SPNG section 3.3.5.1 documents an odd behavior the SPNEGO layer
  needs to implement specifically for the NTLMSSP mechanism.  This is
  required for compatibility with Windows services.

  Upstream commit:
  https://github.com/krb5/krb5/commit/cb96ca52a3354e5a0ea52e12495ff375de54f9b7

  We've run into this issue with Linux to Windows negotiation with
  encrypted http using GSSAPI.

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