Class: WebAuthn::AttestationStatement::FidoU2f::PublicKey

Inherits:
Object
  • Object
show all
Defined in:
lib/webauthn/attestation_statement/fido_u2f/public_key.rb

Constant Summary collapse

COORDINATE_LENGTH = 
32
UNCOMPRESSED_FORM_INDICATOR = 
"\x04"

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(data) ⇒ PublicKey

Returns a new instance of PublicKey.



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# File 'lib/webauthn/attestation_statement/fido_u2f/public_key.rb', line 20

def initialize(data)
  @data = data
end

Class Method Details

.uncompressed_point?(data) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/webauthn/attestation_statement/fido_u2f/public_key.rb', line 14

def self.uncompressed_point?(data)
  data.size &&
    data.length == UNCOMPRESSED_FORM_INDICATOR.length + COORDINATE_LENGTH * 2 &&
    data[0] == UNCOMPRESSED_FORM_INDICATOR
end

Instance Method Details

#to_uncompressed_point ⇒ Object 



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# File 'lib/webauthn/attestation_statement/fido_u2f/public_key.rb', line 31

def to_uncompressed_point
  UNCOMPRESSED_FORM_INDICATOR + cose_key.x + cose_key.y
end

#valid? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/webauthn/attestation_statement/fido_u2f/public_key.rb', line 24

def valid?
  data.size >= COORDINATE_LENGTH * 2 &&
    cose_key.x.length == COORDINATE_LENGTH &&
    cose_key.y.length == COORDINATE_LENGTH &&
    cose_key.alg == COSE::Algorithm.by_name("ES256").id
end