cryptol changelog

Changelog History

Page 2

• v2.4.0 Changes

  July 06, 2016

  Cryptol 2.4.0

  🚀 This is primarily a maintenance release to support GHC 8.0.1 and drop
  👌 support for the GHC 7.8 series, and to roll up a number of smaller
  👌 improvements and fixes. Highlights are below, and a comprehensive list
  of closed issues is available on GitHub.

  ➕ Added

  • ➕ Added convenient aliases to the prelude: a prefix complement
    operator ~, and a base-2 logarithm type alias lg2.
  • 🆕 New library functions in a new module Cryptol::Extras. We
    🚚 intend to eventually move these functions into the prelude, but at
    the moment they take too long to typecheck for them to be loaded
    so frequently (tracking this as issue #302).

  • 💻 A new command line option --command/-c specifies
    commands to be run after the interpreter loads. Multiple commands
    can be specified, and will be run in order. For example:

    cryptol Foo.cry --command ':set prover=abc' --command ':prove'

  • ➕ Added :readByteArray and :writeByteArray to read and
    write raw byte sequences from files, for example:

    Cryptol> :writeByteArray /tmp/foo "hello world" Cryptol> :readByteArray /tmp/foo Cryptol> it "hello world"

  • ➕ Added new examples: A51, Bivium, Trivium, Minilock

  • 🏁 The Windows installer now offers a choice of destination
    directory, and can add the installation directory to the user's
    path.

  🔄 Changed

  • ⬇️ Dropped support for GHC 7.8.4 and earlier.
  • The symbolic simulator now takes advantage of an SBV feature that
    🐎 can lead to signifcant performance improvements when selecting
    from tables of constant values.
  • 👀 The random primitive now takes a 256-bit seed, rather than the
    👀 previous 32-bit seed. This avoids inconsistencies between
    platforms with different machine word sizes.
  • 🚚 The splitBy function in the prelude has been removed in favor of
    just using split, which has an identical type.
  • 👌 Improved documentation and book, notably adding a section about
    using modules, and more syntax details.
  • 👌 Improved the parser to allow for more flexible use of prefix
    operators.
  • 👌 Improved formatting of output for several commands and error
    messages.

  🛠 Fixes

  • 🛠 Fixed certain keywords, such as if and else, not appearing as
    tab-completion results.
  • 🛠 Fixed incorrect behavior of shifts and rotates by greater than
    2^63.
  • 🛠 Fixed the prelude not loading when a module specified at the
    💻 command line fails to load.
  • 🛠 Fixed type-correctness of certain generated SMTLIB code from the
    symbolic simulator.
  • 🛠 Fixed a performance regression caused by unnecessarily-parallel
    ⚙ runtime settings.

• v2.3.0 Changes

  January 20, 2016

  Cryptol 2.3.0

  General Improvements Made

  • ➕ Added new typechecker solver and typechecker improvements.

  🚀 The major feature of this release is a revised constraint solver
  for typechecking, and improvements to how the typechecker
  generates and propagates constraints. In many cases, the
  typechecker will now accept simpler type signatures and require
  fewer extraneous "obvious" constraints.

  If an existing definition fails to typecheck with the new solver,
  try simplifying or eliminating its signature. Some of the
  constraints added only to satisfy the earlier typechecker may no
  longer be necessary or checkable.

  Despite the improvements, we are still aware of some bugs with the
  🆕 new solver. If you run into trouble, see
  the relevant tickets.

  • Made the fixity of primitives more consistent with their
    counterparts in other languages.
  • 🛠 Fixed some incorrect strictness in primitives.
  • 🛠 Fixed some pretty-printing bugs that caused commands like :type
    🖨 to print results with invalid Cryptol syntax.
  • 👌 Improved Windows installer, allowing installation to custom
    locations, and adding the executables' directory to the user's
    path.
  • 🐎 Numerous performance and stability fixes.

  🔋 Features Added

  • ➕ Added an interpreter option :set tc-solver to allow configuration
    of the SMT solver used during typechecking.

  • ➕ Added support for docstrings on Cryptol definitions. Docstring
    syntax is the same as block comment syntax, but with more than one
    * opening the block, for example:

    /** This is the docstring of foo */ foo x = x + 1

  With this example loaded, typing :help foo will display the both
  📄 the type and the docstring for foo.

  • ➕ Added :writeByteArray and :readByteArray interpreter commands
    which allow the interpreter to write values of type [n][8] to a
    file, and then read those values back in (currently binding the
    result to the it variable).
  • ➕ Added support for UTF-8 in identifiers, and set the locale of the
    interpreter to UTF-8. If you encounter errors reading in your old
    Cryptol files, make sure they are encoded as UTF-8.
  • ➕ Added experimental cryptol-server executable, which can be built
    🏗 by passing -fserver to a Cabal build, or by prefixing a Makefile
    🏗 build with CRYPTOL_SERVER=1. The interface to this server is
    👀 very unstable, but to see an example of it in use, see
    ✅ pycryptol.

  Examples Added

  • 3DES
  • ChaCha20
  • FNV-a1
  • SIV (RFC5297)
  • Salsa20
  • MiniLock (including SHA256, Blake2s, Curve25519, SCrypt, PBKDF2, Salsa20, Poly1305)

  Contrib

  • Even-Mansour

  Puzzles

  • Coins
  • Fox-Chicken-Corn
  • Marble
  • NQueens

• v2.2.6 Changes

  December 25, 2015

  🚀 Release of version 2.2.6

• v2.2.5 Changes

  October 01, 2015

  Cryptol 2.2.5

  🚀 This is a minor release:

  • 🚀 Changed to exclude SBV version 5.0, but work with both older and upcoming releases
  • ✂ Removed the iteSolver option which has soundness issues in older versions of SBV (see LeventErkok/sbv#180)

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