Class: FbGraph::Auth::SignedRequest

Inherits:
Object
  • Object
show all
Defined in:
lib/fb_graph/auth/signed_request.rb

Constant Summary collapse

OAUTH_DIALOG_ENDPOINT = 
'https://www.facebook.com/dialog/oauth'

Class Method Summary collapse

Class Method Details

.verify(client, signed_request) ⇒ Object

Raises:



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# File 'lib/fb_graph/auth/signed_request.rb', line 9

def self.verify(client, signed_request)
  signature, payload = signed_request.split('.')
  raise VerificationFailed.new(401, 'No Signature') if signature.blank?
  raise VerificationFailed.new(401, 'No Payload') if payload.blank?
  signature = base64_url_decode signature
  data = decode_json base64_url_decode(payload)
  raise VerificationFailed.new(401, 'Unexpected Signature Algorithm') unless data[:algorithm] == 'HMAC-SHA256'
  _signature_ = sign(client.secret, payload)
  raise VerificationFailed.new(401, 'Signature Invalid') unless signature == _signature_
  data
end