Module: Solace::Utils::Curve25519Dalek

Extended by:
FFI::Library
Defined in:
lib/solace/utils/curve25519_dalek.rb

Overview

Module for interacting with the Curve25519 Dalek library

This module provides a wrapper around the Curve25519 Dalek library, which is a pure-Rust implementation of the Curve25519 elliptic curve. It uses FFI to interface with the native rust library when checking if a point is on the curve.

See Also:

Since:

  • 0.0.2

Constant Summary collapse

LIB_PATH =

!@attribute LIB_PATH

Returns:

  • (String) —

    The path to the native library

Since:

  • 0.0.2

File.expand_path(libfile, __dir__)

Class Method Summary collapse

Class Method Details

.on_curve?(bytes) ⇒ Boolean

Checks if a point is on the curve

Parameters:

  • bytes (Array) —

    The bytes to check

Returns:

  • (Boolean) —

    True if the point is on the curve, false otherwise

Raises:

  • (ArgumentError) —

    If the input is not 32 bytes

Since:

  • 0.0.2



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# File 'lib/solace/utils/curve25519_dalek.rb', line 48

def self.on_curve?(bytes)
  raise ArgumentError, 'Must be 32 bytes' unless bytes.bytesize == 32

  FFI::MemoryPointer.new(:uchar, 32) do |ptr|
    ptr.put_bytes(0, bytes)
    result = Curve25519Dalek.is_on_curve(ptr)

    case result
    when 1 then return true
    when 0 then return false
    else raise "Unexpected return code from native is_on_curve: #{result}"
    end
  end
end