Class: H2C::M2C::SSWUAB0

Inherits:

Object

• Object
• H2C::M2C::SSWUAB0

Defined in:

lib/h2c/m2c/sswuab0.rb

Overview

www.ietf.org/archive/id/draft-irtf-cfrg-hash-to-curve-16.html#section-6.6.3

Instance Attribute Summary

• #iso ⇒ Object readonly

  Returns the value of attribute iso.

• #sswu ⇒ Object readonly

  Returns the value of attribute sswu.

Instance Method Summary

• #initialize(iso, z) ⇒ SSWUAB0 constructor

  Constructor.

• #map(u) ⇒ ECDSA::Point

  www.ietf.org/archive/id/draft-irtf-cfrg-hash-to-curve-16.html#section-6.6.3.

Constructor Details

#initialize(iso, z) ⇒ SSWUAB0

Constructor

Parameters:

• iso (H2C::M2C::ISOGeny)
• z (Integer)

# File 'lib/h2c/m2c/sswuab0.rb', line 11

def initialize(iso, z)
  @sswu = SSWU.new(iso.e0, z)
  @iso = iso
end

Instance Attribute Details

#iso ⇒ Object (readonly)

Returns the value of attribute iso.

# File 'lib/h2c/m2c/sswuab0.rb', line 6

def iso
  @iso
end

#sswu ⇒ Object (readonly)

Returns the value of attribute sswu.

# File 'lib/h2c/m2c/sswuab0.rb', line 6

def sswu
  @sswu
end

Instance Method Details

#map(u) ⇒ ECDSA::Point

www.ietf.org/archive/id/draft-irtf-cfrg-hash-to-curve-16.html#section-6.6.3

Parameters:

• u (Integer)

Returns:

• (ECDSA::Point)

# File 'lib/h2c/m2c/sswuab0.rb', line 19

def map(u)
  p = sswu.map(u)
  coordinate = iso.map(p.x, p.y)
  iso.e1.new_point(coordinate)
end