Module: PolyPseudo::OpenSSLPointExtension

Extended by:
FFI::Library
Defined in:
lib/ext/openssl_ec.rb

Constant Summary collapse

NID_brainpoolP320r1 = 
929
POINT_CONVERSION_COMPRESSED = 
2
POINT_CONVERSION_UNCOMPRESSED = 
4

Class Method Summary collapse

Class Method Details

.add(point_0, point_1) ⇒ Object 



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# File 'lib/ext/openssl_ec.rb', line 22

def self.add(point_0, point_1)
  group       = EC_GROUP_new_by_curve_name(NID_brainpoolP320r1)
  point_0_hex = point_0.to_bn.to_s(16)
  point_0_pt  = EC_POINT_hex2point(group, point_0_hex, nil, nil)
  point_1_hex = point_1.to_bn.to_s(16)
  point_1_pt  = EC_POINT_hex2point(group, point_1_hex, nil, nil)
  sum_point   = EC_POINT_new(group)
  success     = EC_POINT_add(group, sum_point, point_0_pt, point_1_pt, nil)
  if success
    hex = EC_POINT_point2hex(group, sum_point, POINT_CONVERSION_COMPRESSED, nil)
    OpenSSL::PKey::EC::Point.new(PolyPseudo.config.group, OpenSSL::BN.new(hex, 16))
  end
ensure
  EC_POINT_free(sum_point)
end

.point2hex(point, compressed) ⇒ Object 



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# File 'lib/ext/openssl_ec.rb', line 53

def self.point2hex(point, compressed)
  group     = EC_GROUP_new_by_curve_name(NID_brainpoolP320r1)
  point_hex = point.to_bn.to_s(16)
  point_pt  = EC_POINT_hex2point(group, point_hex, nil, nil)
  EC_POINT_point2hex(group, point_pt, compressed ? POINT_CONVERSION_COMPRESSED : POINT_CONVERSION_UNCOMPRESSED, nil)
end

.x_y(point) ⇒ Object 



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# File 'lib/ext/openssl_ec.rb', line 38

def self.x_y(point)
  group     = EC_GROUP_new_by_curve_name(NID_brainpoolP320r1)
  point_hex = point.to_bn.to_s(16)
  point_pt  = EC_POINT_hex2point(group, point_hex, nil, nil)
  x_coord   = BN_new()
  y_coord   = BN_new()

  EC_POINT_get_affine_coordinates_GFp(group, point_pt, x_coord, y_coord, nil)

  [OpenSSL::BN.new(BN_bn2hex(x_coord), 16), OpenSSL::BN.new(BN_bn2hex(y_coord), 16)]
ensure
  BN_free(x_coord)
  BN_free(y_coord)
end