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Change log

This gem follows Semantic Versioning 2.0.0. All classes and public methods are part of the public API, unless explicitly noted otherwise in their documentation.

1.2.0

Released on 2014-09-14.

  • Adds aliases to ECDSA::Point so you can do point arithmetic with + and * operators. (Thanks to Stephen McCarthy.)

1.1.0

Released on 2014-04-20.

New features:

  • ECDSA.recover_public_key was added. It finds all possible public keys that could have been used to make a signature.
  • Group#valid_public_key? and Group#partially_valid_public_key? were added. They are different from Group#include? because they both return false for the infinity point and Group#valid_public_key? checks to make sure that the point can be expressed as the generator point times a scalar.
  • PrimeField#square_roots now works all prime fields.

Bug fixes:

  • The signing and verification operations now properly take the leftmost bits of the digest if it is a string. If it is an integer, it is left alone.
  • Nicer exception error messages from ECDSA.check_signature!. They start with "Invalid signature: " so they could be understood in the context of a larger application without looking at the class of the exception.
  • ECDSA.sign returns nil if r is zero.

1.0.0

Released on 2014-04-06.

  • PointOctetString: Made the decode method treat all strings as binary.
  • Group: Changed two methods to be private: #point_satisfies_equation? and #equation_right_hand_side.
  • Group: made #include? return false instead of raising an exception when a point in another group is passed in.
  • Added lots of documentation.