class MessageBird::SignedRequest

Public Class Methods

new(query_parameters, signature, request_timestamp, body) click to toggle source
# File lib/messagebird/signed_request.rb, line 12
def initialize(query_parameters, signature, request_timestamp, body)
  unless query_parameters.is_a? Hash
    raise ValidationException, 'The "query_parameters" value is invalid.'
  end
  unless signature.is_a? String
    raise ValidationException, 'The "signature" value is invalid.'
  end
  unless request_timestamp.is_a? Integer
    raise ValidationException, 'The "request_timestamp" value is invalid.'
  end
  unless body.is_a? String
    raise ValidationException, 'The "body" value is invalid.'
  end

  @query_parameters = query_parameters
  @signature = signature
  @request_timestamp = request_timestamp
  @body = body
end

Public Instance Methods

build_payload() click to toggle source
# File lib/messagebird/signed_request.rb, line 38
def build_payload
  parts = []
  parts.push(@request_timestamp)
  parts.push(URI.encode_www_form(@query_parameters.sort))
  parts.push(Digest::SHA256.new.digest(@body))
  parts.join("\n")
end
recent?(offset = 10) click to toggle source
# File lib/messagebird/signed_request.rb, line 46
def recent?(offset = 10)
  (Time.now.getutc.to_i - @request_timestamp) < offset
end
verify(signing_key) click to toggle source
# File lib/messagebird/signed_request.rb, line 32
def verify(signing_key)
  calculated_signature = OpenSSL::HMAC.digest(OpenSSL::Digest.new('sha256'), signing_key, build_payload)
  expected_signature = Base64.decode64(@signature)
  calculated_signature.bytes == expected_signature.bytes
end