Class: MAuth::Client

Inherits:
Object
  • Object
show all
Includes:
Authenticator, Signer
Defined in:
lib/mauth/client.rb,
lib/mauth/client.rb

Overview

does operations which require a private key and corresponding app uuid. this is primarily:

  • signing outgoing requests and responses

  • authenticating incoming requests and responses, which may require retrieving the appropriate public key from mAuth (which requires a request to mAuth which is signed using the private key)

this nominally operates on request and response objects, but really the only requirements are that the object responds to the methods of MAuth::Signable and/or MAuth::Signed (as appropriate)

Defined Under Namespace

Modules: Authenticator, LocalAuthenticator, RemoteRequestAuthenticator, Signer Classes: ConfigurationError

Constant Summary collapse

MWS_TOKEN = 
'MWS'.freeze

Constants included from Authenticator

Authenticator::ALLOWED_DRIFT_SECONDS

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Authenticator

#authentic?, #authenticate!

Methods included from Signer

#signature, #signed, #signed_headers

Constructor Details

#initialize(config = {}) ⇒ Client

new client with the given App UUID and public key. config may include the following (all config keys may be strings or symbols):

  • private_key - required for signing and for authenticating responses. may be omitted if only remote authentication of requests is being performed (with MAuth::Rack::RequestAuthenticator). may be given as a string or a OpenSSL::PKey::RSA instance.

  • app_uuid - required in the same circumstances where a private_key is required

  • mauth_baseurl - required. needed for local authentication to retrieve public keys; needed for remote authentication for hopefully obvious reasons.

  • mauth_api_version - required. only ‘v1’ exists / is supported as of this writing.

  • logger - a Logger to which any useful information will be written. if this is omitted and Rails.logger exists, that will be used.

  • authenticator - this pretty much never needs to be specified. LocalAuthenticator or RemoteRequestAuthenticator will be used as appropriate.



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# File 'lib/mauth/client.rb', line 156

def initialize(config = {})
  # stringify symbol keys
  given_config = config.stringify_symbol_keys
  # build a configuration which discards any irrelevant parts of the given config (small memory usage matters here)
  @config = {}
  if given_config['private_key_file'] && !given_config['private_key']
    given_config['private_key'] = File.read(given_config['private_key_file'])
  end
  @config['private_key'] = case given_config['private_key']
   when nil
     nil
   when String
     OpenSSL::PKey::RSA.new(given_config['private_key'])
   when OpenSSL::PKey::RSA
     given_config['private_key']
   else
     raise MAuth::Client::ConfigurationError, "unrecognized value given for 'private_key' - this may be a " \
       "String, a OpenSSL::PKey::RSA, or omitted; instead got: #{given_config['private_key'].inspect}"
  end
  @config['app_uuid'] = given_config['app_uuid']
  @config['mauth_baseurl'] = given_config['mauth_baseurl']
  @config['mauth_api_version'] = given_config['mauth_api_version']
  @config['logger'] = given_config['logger'] || begin
    if Object.const_defined?('Rails') && Rails.logger
      Rails.logger
    else
      require 'logger'
      is_win = RUBY_PLATFORM =~ /mswin|windows|mingw32|cygwin/i
      null_device = is_win ? 'NUL' : '/dev/null'
      ::Logger.new(File.open(null_device, File::WRONLY))
    end
  end

  request_config = { timeout: 10, open_timeout: 10 }
  request_config.merge!(symbolize_keys(given_config['faraday_options'])) if given_config['faraday_options']
  @config['faraday_options'] = { request: request_config } || {}
  @config['ssl_certs_path'] = given_config['ssl_certs_path'] if given_config['ssl_certs_path']

  # if 'authenticator' was given, don't override that - including if it was given as nil / false
  if given_config.key?('authenticator')
    @config['authenticator'] = given_config['authenticator']
  else
    if client_app_uuid && private_key
      # MAuth::Client can authenticate locally if it's provided a client_app_uuid and private_key
      @config['authenticator'] = LocalAuthenticator
    else
      # otherwise, it will authenticate remotely (requests only)
      @config['authenticator'] = RemoteRequestAuthenticator
    end
  end
  extend @config['authenticator'] if @config['authenticator']
end

Class Method Details

.default_config(options = {}) ⇒ Object

returns a configuration (to be passed to MAuth::Client.new) which is configured from information stored in standard places. all of which is overridable by options in case some defaults do not apply.

options (may be symbols or strings) - any or all may be omitted where your usage conforms to the defaults.

  • root: the path relative to which this method looks for configuration yaml files. defaults to Rails.root if ::Rails is defined, otherwise ENV, ENV, ENV, or ‘.’

  • environment: the environment, pertaining to top-level keys of the configuration yaml files. by default, tries Rails.environment, ENV, and ENV, and falls back to ‘development’ if none of these are set.

  • mauth_config - MAuth configuration. defaults to load this from a yaml file (see mauth_config_yml option) which is assumed to be keyed with the environment at the root. if this is specified, no yaml file is loaded, and the given config is passed through with any other defaults applied. at the moment, the only other default is to set the logger.

  • mauth_config_yml - specifies where a mauth configuration yaml file can be found. by default checks ENV or a file ‘config/mauth.yml’ relative to the root.

  • logger - by default checks ::Rails.logger



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# File 'lib/mauth/client.rb', line 30

def default_config(options = {})
  options = options.stringify_symbol_keys

  # find the app_root (relative to which we look for yaml files). note that this
  # is different than MAuth::Client.root, the root of the mauth-client library.
  app_root = options['root'] || begin
    if Object.const_defined?('Rails') && ::Rails.respond_to?(:root) && ::Rails.root
      Rails.root
    else
      ENV['RAILS_ROOT'] || ENV['RACK_ROOT'] || ENV['APP_ROOT'] || '.'
    end
  end

  # find the environment (with which yaml files are keyed)
  env = options['environment'] || begin
    if Object.const_defined?('Rails') && ::Rails.respond_to?(:environment)
      Rails.environment
    else
      ENV['RAILS_ENV'] || ENV['RACK_ENV'] || 'development'
    end
  end

  # find mauth config, given on options, or in a file at
  # ENV['MAUTH_CONFIG_YML'] or config/mauth.yml in the app_root
  mauth_config = options['mauth_config'] || begin
    mauth_config_yml = options['mauth_config_yml']
    mauth_config_yml ||= ENV['MAUTH_CONFIG_YML']
    default_loc = 'config/mauth.yml'
    default_yml = File.join(app_root, default_loc)
    mauth_config_yml ||= default_yml if File.exist?(default_yml)
    if mauth_config_yml && File.exist?(mauth_config_yml)
      whole_config = ConfigFile.load(mauth_config_yml)
      errmessage = "#{mauth_config_yml} config has no key #{env} - it has keys #{whole_config.keys.inspect}"
      whole_config[env] || raise(MAuth::Client::ConfigurationError, errmessage)
    else
      raise MAuth::Client::ConfigurationError, "could not find mauth config yaml file. this file may be " \
        "placed in #{default_loc}, specified with the mauth_config_yml option, or specified with the " \
        "MAUTH_CONFIG_YML environment variable."
    end
  end

  unless mauth_config.key?('logger')
    # the logger. Rails.logger if it exists, otherwise, no logger
    mauth_config['logger'] = options['logger'] || begin
      if Object.const_defined?('Rails') && ::Rails.respond_to?(:logger)
        Rails.logger
      end
    end
  end

  mauth_config
end

Instance Method Details

#assert_private_key(err) ⇒ Object 



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# File 'lib/mauth/client.rb', line 237

def assert_private_key(err)
  raise err unless private_key
end

#client_app_uuid ⇒ Object 



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# File 'lib/mauth/client.rb', line 213

def client_app_uuid
  @config['app_uuid']
end

#faraday_options ⇒ Object 



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# File 'lib/mauth/client.rb', line 229

def faraday_options
  @config['faraday_options']
end

#logger ⇒ Object 



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# File 'lib/mauth/client.rb', line 209

def logger
  @config['logger']
end

#mauth_api_version ⇒ Object 



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# File 'lib/mauth/client.rb', line 221

def mauth_api_version
  @config['mauth_api_version'] || raise(MAuth::Client::ConfigurationError, "no configured mauth_api_version!")
end

#mauth_baseurl ⇒ Object 



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# File 'lib/mauth/client.rb', line 217

def mauth_baseurl
  @config['mauth_baseurl'] || raise(MAuth::Client::ConfigurationError, "no configured mauth_baseurl!")
end

#private_key ⇒ Object 



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# File 'lib/mauth/client.rb', line 225

def private_key
  @config['private_key']
end

#ssl_certs_path ⇒ Object 



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# File 'lib/mauth/client.rb', line 233

def ssl_certs_path
  @config['ssl_certs_path']
end