1. 26 May, 2018 2 commits
  2. 12 Jan, 2018 1 commit
    • Eric Biggers's avatar
      crypto: hash - annotate algorithms taking optional key · a208fa8f
      Eric Biggers authored
      We need to consistently enforce that keyed hashes cannot be used without
      setting the key.  To do this we need a reliable way to determine whether
      a given hash algorithm is keyed or not.  AF_ALG currently does this by
      checking for the presence of a ->setkey() method.  However, this is
      actually slightly broken because the CRC-32 algorithms implement
      ->setkey() but can also be used without a key.  (The CRC-32 "key" is not
      actually a cryptographic key but rather represents the initial state.
      If not overridden, then a default initial state is used.)
      
      Prepare to fix this by introducing a flag CRYPTO_ALG_OPTIONAL_KEY which
      indicates that the algorithm has a ->setkey() method, but it is not
      required to be called.  Then set it on all the CRC-32 algorithms.
      
      The same also applies to the Adler-32 implementation in Lustre.
      
      Also, the cryptd and mcryptd templates have to pass through the flag
      from their underlying algorithm.
      
      Cc: stable@vger.kernel.org
      Signed-off-by: 's avatarEric Biggers <ebiggers@google.com>
      Signed-off-by: 's avatarHerbert Xu <herbert@gondor.apana.org.au>
      a208fa8f
  3. 30 Jan, 2016 1 commit
  4. 24 Nov, 2014 1 commit
  5. 19 Jan, 2013 1 commit