DEVX-8994: Change default client tokens to JWT (#274)

* Changing default client tokens to use JWT

.github/workflows/ci.yml

@@ -11,7 +11,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
-        ruby: [2.5, 2.6, 2.7, 3.0]
+        ruby: [3.0, 3.1, 3.2, 3.3]
         exclude:
           - os: windows-latest
             ruby: 3.0

CHANGES.md

@@ -1,3 +1,7 @@
+# 4.10.0
+
+* Updating client token creation to use JWTs by default. See [#274](https://github.com/opentok/OpenTok-Ruby-SDK/pull/274)
+
 # 4.9.0
 
 * Adds the `publisheronly` role for client token creation. See [#272](https://github.com/opentok/OpenTok-Ruby-SDK/pull/272)

Gemfile

@@ -1,4 +1,6 @@
 source "http://rubygems.org"
 
+gem "pry"
+
 # Specify your gem's dependencies in opentok.gemspec
 gemspec

lib/opentok/opentok.rb

@@ -36,6 +36,7 @@ module OpenTok
   #     the token.
   #
   #   @param [Hash] options A hash defining options for the token.
+  #   @option options [String] :token_type The type of token to generate. Must be one of 'T1' or 'JWT'. 'JWT' is the default.
   #   @option options [Symbol] :role The role for the token. Set this to one of the following
   #     values:
   #     * <code>:subscriber</code> -- A subscriber can only subscribe to streams.

lib/opentok/session.rb

@@ -28,6 +28,7 @@ module OpenTok
   #   Generates a token.
   #
   #   @param [Hash] options
+  #   @option options [String] :token_type The type of token to generate. Must be one of 'T1' or 'JWT'. 'JWT' is the default.
   #   @option options [Symbol] :role The role for the token. Set this to one of the following
   #     values:
   #     * <code>:subscriber</code> -- A subscriber can only subscribe to streams.

lib/opentok/token_generator.rb

@@ -6,10 +6,13 @@
 require "openssl"
 require "active_support"
 require "active_support/time"
+require "jwt"
 
 module OpenTok
   # @private
   module TokenGenerator
+    VALID_TOKEN_TYPES = ['T1', 'JWT'].freeze
+
     # this works when using include TokenGenerator
     def self.included(base)
       base.extend(ClassMethods)
@@ -33,7 +36,14 @@ def generates_tokens(arg_lambdas={})
           end
           dynamic_args.compact!
           args = args.first(4-dynamic_args.length)
-          self.class.generate_token.call(*dynamic_args, *args)
+          token_type = if args.any? && args.last.is_a?(Hash) && args.last.has_key?(:token_type)
+            args.last[:token_type].upcase
+          else
+            "JWT"
+          end
+          raise "'#{token_type}' is not a valid token type. Must be one of: #{VALID_TOKEN_TYPES.join(', ')}" unless VALID_TOKEN_TYPES.include? token_type
+
+          self.class.generate_token(token_type).call(*dynamic_args, *args)
         end
       end
 
@@ -43,14 +53,14 @@ def arg_lambdas
       end
 
       # Generates a token
-      def generate_token
-        TokenGenerator::GENERATE_TOKEN_LAMBDA
+      def generate_token(token_type)
+        token_type == 'T1' ? TokenGenerator::GENERATE_T1_TOKEN_LAMBDA : TokenGenerator::GENERATE_JWT_LAMBDA
       end
 
     end
 
     # @private TODO: this probably doesn't need to be a constant anyone can read
-    GENERATE_TOKEN_LAMBDA = ->(api_key, api_secret, session_id, opts = {}) do
+    GENERATE_T1_TOKEN_LAMBDA = ->(api_key, api_secret, session_id, opts = {}) do
       # normalize required data params
       role = opts.fetch(:role, :publisher)
       unless ROLES.has_key? role
@@ -101,6 +111,53 @@ def generate_token
       TOKEN_SENTINEL + Base64.strict_encode64(meta_string + ":" + data_string)
     end
 
+    GENERATE_JWT_LAMBDA = ->(api_key, api_secret, session_id, opts = {}) do
+      # normalize required data params
+      role = opts.fetch(:role, :publisher)
+      unless ROLES.has_key? role
+        raise "'#{role}' is not a recognized role"
+      end
+      unless Session.belongs_to_api_key? session_id.to_s, api_key
+        raise "Cannot generate token for a session_id that doesn't belong to api_key: #{api_key}"
+      end
+
+      # minimum data params
+      data_params = {
+        :iss => api_key,
+        :ist => "project",
+        :iat => Time.now.to_i,
+        :exp => Time.now.to_i + 86400,
+        :nonce => Random.rand,
+        :role => role,
+        :scope => "session.connect",
+        :session_id => session_id,
+      }
+
+      # normalize and add additional data params
+      unless (expire_time = opts[:expire_time].to_i) == 0
+        unless expire_time.between?(Time.now.to_i, (Time.now + 30.days).to_i)
+          raise "Expire time must be within the next 30 days"
+        end
+        data_params[:exp] = expire_time.to_i
+      end
+
+      unless opts[:data].nil?
+        unless (data = opts[:data].to_s).length < 1000
+          raise "Connection data must be less than 1000 characters"
+        end
+        data_params[:connection_data] = data
+      end
+
+      if opts[:initial_layout_class_list]
+        if opts[:initial_layout_class_list].is_a?(Array)
+          data_params[:initial_layout_class_list] = opts[:initial_layout_class_list].join(' ')
+        else
+          data_params[:initial_layout_class_list] = opts[:initial_layout_class_list].to_s
+        end
+      end
+
+      JWT.encode(data_params, api_secret, 'HS256', header_fields={typ: 'JWT'})
+    end
 
     # this works when using extend TokenGenerator
     # def generates_tokens(method_opts)

lib/opentok/version.rb

@@ -1,4 +1,4 @@
 module OpenTok
   # @private
-  VERSION = '4.9.0'
+  VERSION = '4.10.0'
 end

spec/matchers/token.rb

@@ -3,8 +3,9 @@
 require "base64"
 require "openssl"
 require "addressable/uri"
+require "jwt"
 
-RSpec::Matchers.define :carry_token_data do |input_data|
+RSpec::Matchers.define :carry_t1_token_data do |input_data|
   option_to_token_key = {
     :api_key => :partner_id,
     :data => :connection_data,
@@ -37,7 +38,7 @@
   end
 end
 
-RSpec::Matchers.define :carry_valid_token_signature do |api_secret|
+RSpec::Matchers.define :carry_valid_t1_token_signature do |api_secret|
   match do |token|
     decoded_token = Base64.decode64(token[4..token.length])
     metadata, data_string = decoded_token.split(':')
@@ -48,3 +49,34 @@
     signature == OpenSSL::HMAC.hexdigest(digest, api_secret, data_string)
   end
 end
+
+RSpec::Matchers.define :carry_jwt_token_data do |input_data|
+  match do |token|
+    decoded_token = JWT.decode(token, nil, false)
+    token_data = decoded_token.first.transform_keys {|k| k.to_sym}.transform_values {|v| v.to_s}
+    check_token_data = lambda { |key, value|
+      if token_data.has_key? key
+        unless value.nil?
+          return token_data[key] == value.to_s
+        end
+        return true
+      end
+      false
+    }
+    unless input_data.respond_to? :all?
+      return check_token_data.call(input_data, nil)
+    end
+    input_data.all? { |k, v| check_token_data.call(k, v) }
+  end
+end
+
+RSpec::Matchers.define :carry_valid_jwt_token_signature do |api_secret|
+  match do |token|
+    begin
+      JWT.decode(token, api_secret, true)
+    rescue
+      return false
+    end
+    true
+  end
+end

spec/opentok/session_spec.rb

@@ -72,5 +72,4 @@
     end
     include_examples "session generates tokens"
   end
-
 end