tor/changes/bug3122_memcmp

  o Security fixes
    - Replace all potentially sensitive memory comparison operations
      with versions whose runtime does not depend on the data being
      compared. This will help resist a class of attacks where an
      adversary can use variations in timing information to learn
      sensitive data.  Fix for one case of bug 3122.  (Safe memcmp
      implementation by Robert Ransom based partially on code by DJB.)
Add a data-independent variant of memcmp and a d-i memeq function. The tor_memcmp code is by Robert Ransom, and the tor_memeq code is by me. Both incorporate some ideas from DJB's stuff. 2011-05-10 00:39:23 +02:00			`o Security fixes`
			`- Replace all potentially sensitive memory comparison operations`
			`with versions whose runtime does not depend on the data being`
			`compared. This will help resist a class of attacks where an`
			`adversary can use variations in timing information to learn`
			`sensitive data. Fix for one case of bug 3122. (Safe memcmp`
			`implementation by Robert Ransom based partially on code by DJB.)`