class COSE::Key::EC2
Constants
- KTY_EC2
- LABEL_Y
Attributes
y[R]
Public Class Methods
enforce_type(map)
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# File lib/cose/key/ec2.rb, line 14 def self.enforce_type(map) if map[LABEL_KTY] != KTY_EC2 raise "Not an EC2 key" end end
from_pkey(pkey)
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# File lib/cose/key/ec2.rb, line 20 def self.from_pkey(pkey) curve = Curve.by_pkey_name(pkey.group.curve_name) || raise("Unsupported EC curve #{pkey.group.curve_name}") case pkey when OpenSSL::PKey::EC::Point public_key = pkey when OpenSSL::PKey::EC public_key = pkey.public_key private_key = pkey.private_key else raise "Unsupported" end if public_key bytes = public_key.to_bn.to_s(2)[1..-1] coordinate_length = bytes.size / 2 x = bytes[0..(coordinate_length - 1)] y = bytes[coordinate_length..-1] end if private_key d = private_key.to_s(2) end new(crv: curve.id, x: x, y: y, d: d) end
keyword_arguments_for_initialize(map)
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Calls superclass method
COSE::Key::CurveKey::keyword_arguments_for_initialize
# File lib/cose/key/ec2.rb, line 90 def self.keyword_arguments_for_initialize(map) super.merge(y: map[LABEL_Y]) end
new(y: nil, **keyword_arguments)
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Calls superclass method
COSE::Key::CurveKey::new
# File lib/cose/key/ec2.rb, line 51 def initialize(y: nil, **keyword_arguments) # rubocop:disable Naming/MethodParameterName if (!y || !keyword_arguments[:x]) && !keyword_arguments[:d] raise ArgumentError, "Both x and y are required if d is missing" else super(**keyword_arguments) @y = y end end
Public Instance Methods
curve()
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# File lib/cose/key/ec2.rb, line 86 def curve Curve.find(crv) end
map()
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Calls superclass method
COSE::Key::CurveKey#map
# File lib/cose/key/ec2.rb, line 61 def map super.merge( Base::LABEL_KTY => KTY_EC2, LABEL_Y => y, ).compact end
to_pkey()
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# File lib/cose/key/ec2.rb, line 68 def to_pkey if curve group = OpenSSL::PKey::EC::Group.new(curve.pkey_name) pkey = OpenSSL::PKey::EC.new(group) public_key_bn = OpenSSL::BN.new("\x04" + x + y, 2) public_key_point = OpenSSL::PKey::EC::Point.new(group, public_key_bn) pkey.public_key = public_key_point if d pkey.private_key = OpenSSL::BN.new(d, 2) end pkey else raise "Unsupported curve #{crv}" end end