RbNaCl 2.0.0: a modern cryptography library for Ruby

RbNaCl is a Ruby FFI binding to the Networking and Cryptography Library
by
Dan Bernstein and his collaborators:

https://github.com/cryptosphere/rbnacl

The slides from a recent presentation by library author Tony A.
(yours
truly) are available on SpeakerDeck:

https://speakerdeck.com/tarcieri/being-boring-a-survivors-guide-to-ruby-cryptography

Version 2.0 is a refactoring designed to better reflect the extensible
API
of the C library which allows for the inclusion of additional primitives
beyond the defaults found in the library today.

Full list of changes from the 1.x releases:

  • Add encrypt/decrypt aliases for Crypto::RandomNonceBox
  • Rename Crypto module to RbNaCl module
  • RbNaCl::VerifyKey#verify operand order was reversed. New operand order
    is
    signature, message instead of message, signature
  • RbNaCL::SecretBox#open, RbNaCl::Box#open, Auth#verify and
    VerifyKey#verify all now raise a (descendent of) CryptoError if the
    check
    fails. This ensures failures are handled by the program.
  • RbNaCl::SecretBox, Box, etc. are all now aliases for the real
    implementations, which are named after the primitives they provide
  • Encoders have now gone.
  • Add support for the Blake2b cryptographic hash algorithm.
  • Add checks that we have a sufficiently recent version of libsodium
    (0.4.3+)
  • Dropped ruby-1.8 support
  • Call the sodium_init() function, to select the best algorithms.
  • Fix some typos in the documentation
  • Changes in the low level binding for libsodium and removal of the NaCl
    module
  • Add a mutex around calls to randombytes in libsodium

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