Module: RbNaCl::Sodium

Overview

Provides helpers for defining the libsodium bindings

Defined Under Namespace

Modules: Version

Instance Method Summary collapse

Instance Method Details

#primitiveObject


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# File 'lib/rbnacl/sodium.rb', line 28

def primitive
  sodium_primitive
end

#sodium_constant(constant, name: constant, fallback: nil) ⇒ Object


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# File 'lib/rbnacl/sodium.rb', line 32

def sodium_constant(constant, name: constant, fallback: nil)
  fn_name_components = ["crypto", sodium_type, sodium_primitive, constant.to_s.downcase]
  fn_name = fn_name_components.compact.join("_")

  begin
    attach_function fn_name, [], :size_t
  rescue FFI::NotFoundError
    raise if fallback.nil?

    define_singleton_method fn_name, -> { fallback }
  end

  const_set(name, public_send(fn_name))
end

#sodium_function(name, function, arguments) ⇒ Object


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# File 'lib/rbnacl/sodium.rb', line 47

def sodium_function(name, function, arguments)
  module_eval <<-RUBY, __FILE__, __LINE__ + 1
  attach_function #{function.inspect}, #{arguments.inspect}, :int
  def self.#{name}(*args)
    ret = #{function}(*args)
    ret == 0
  end
  RUBY
end

#sodium_function_with_return_code(name, function, arguments) ⇒ Object


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# File 'lib/rbnacl/sodium.rb', line 57

def sodium_function_with_return_code(name, function, arguments)
  module_eval <<-RUBY, __FILE__, __LINE__ + 1
  attach_function #{function.inspect}, #{arguments.inspect}, :int
  def self.#{name}(*args)
    #{function}(*args)
  end
  RUBY
end

#sodium_primitive(primitive = nil) ⇒ Object


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# File 'lib/rbnacl/sodium.rb', line 20

def sodium_primitive(primitive = nil)
  if primitive.nil?
    @primitive if defined?(@primitive)
  else
    @primitive = primitive
  end
end

#sodium_type(type = nil) ⇒ Object


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# File 'lib/rbnacl/sodium.rb', line 14

def sodium_type(type = nil)
  return @type if type.nil?

  @type = type
end