Class: PolyPseudo::Identity

Inherits:
Object
  • Object
show all
Includes:
PseudoId
Defined in:
lib/poly_pseudo/identity.rb

Instance Attribute Summary

Attributes included from PseudoId

#creator, #point_1, #point_2, #point_3, #recipient, #recipient_key_set_version, #schema_key_version, #schema_version, #type

Instance Method Summary collapse

Methods included from PseudoId

from_asn1, #initialize

Instance Method Details

#decrypt(key) ⇒ Object 



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# File 'lib/poly_pseudo/identity.rb', line 6

def decrypt(key)
  PolyPseudo.init!

  public_key = key.ec.public_key

  raise "Invalid key for decryption" if point_3 != public_key

  private_key = key.ec.private_key

  identity_point = point_1
      .mul(private_key)
      .invert!
      .add(point_2)
      .make_affine!

  decoded = Util.oaep_decode(identity_point.x.to_s(2).rjust(40, "\x00"))
  @identity = decoded.slice(3, decoded[2].ord).force_encoding("UTF-8")
end

#identity ⇒ Object Also known as: pseudo_id 



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# File 'lib/poly_pseudo/identity.rb', line 25

def identity
  @identity || raise('Identity not decrypted yet. call .decrypt first')
end