Merge pull request #1 from Lukc/master

Various.

README.md

@@ -0,0 +1,9 @@
+
+# authd
+
+## Database setup
+
+```sql
+create table users(id int, created_at date, updated_at date, username text, realname text, password text, avatar text, perms text[]);
+```
+

shard.yml

@@ -11,6 +11,8 @@ description: |
 targets:
   authd:
     main: src/main.cr
+  authd-adduser:
+    main: src/adduser.cr
 
 crystal: 0.26
 

src/adduser.cr

@@ -0,0 +1,89 @@
+
+require "option_parser"
+
+require "./user.cr"
+
+user_name     : String? = nil
+user_password : String? = nil
+user_perms    = Array(String).new
+
+database_url = "postgres:localhost"
+database_name = "authd"
+database_user = "nico"
+database_password = "nico-nico-nii"
+
+OptionParser.parse! do |parser|
+	parser.banner = "usage: #{ARGV[0]} [arguments]"
+
+	parser.on "-a url", "--database url", "URL of authd’s database." do |url|
+		database_url = url
+	end
+	parser.on "-U name", "--database-user name", "Name of the database’s user." do |name|
+		database_user = name
+	end
+	parser.on "-P password", "--database-pasword password", "Password of the database’s user." do |password|
+		database_password = password
+	end
+	parser.on "-N name", "--database-name name", "Name of the database." do |name|
+		database_name = name
+	end
+
+	parser.on "-u name", "--username name", "Name of the user to add." do |name|
+		user_name = name
+	end
+	parser.on "-p password", "--password password", "Password of the user." do |password|
+		user_password = password
+	end
+	parser.on "-x perm", "--permission", "Add a permission token to the user." do |token|
+		user_perms << token
+	end
+
+	parser.on("-h", "--help", "Show this help") do
+		puts parser
+		exit 0
+	end
+
+	parser.invalid_option do |flag|
+		puts "error: #{flag} is not a valid option."
+		puts parser
+
+		exit 1
+	end
+end
+
+module DataBase
+	extend Crecto::Repo
+end
+
+DataBase.config do |conf|
+	conf.adapter = Crecto::Adapters::Postgres
+	conf.hostname = database_url
+	conf.username = database_user
+	conf.password = database_password
+	conf.database = database_name
+end
+
+if user_name.nil?
+	STDERR.puts "No username specified."
+	exit 1
+end
+if user_password.nil?
+	STDERR.puts "No user password specified."
+	exit 1
+end
+
+user = AuthD::User.new
+user.username = user_name
+user.password = user_password
+user.perms    = user_perms
+changeset = DataBase.insert user
+
+if changeset.valid?
+	puts "User added successfully."
+else
+	changeset.errors.each do |e|
+		p e
+	end
+end
+
+

src/authd.cr

@@ -0,0 +1,52 @@
+
+require "kemal"
+require "jwt"
+
+require "./user.cr"
+
+class HTTP::Server::Context
+	property authd_user : AuthD::User?
+end
+
+class AuthD::Middleware < Kemal::Handler
+	property key : String = ""
+
+	@configured = false
+	@configurator : Proc(Middleware, Nil)
+
+	def initialize(&block : Proc(Middleware, Nil))
+		@configurator = block
+	end
+
+	def call(context)
+		unless @configured
+			@configured = true
+			@configurator.call self
+		end
+
+		context.request.headers["X-Token"]?.try do |x_token|
+			payload, header = JWT.decode x_token, @key, "HS256"
+
+			if payload
+				context.authd_user = AuthD::User.new.tap do |u|
+					u.username = payload["username"].as_s?
+					u.realname = payload["realname"].as_s?
+					u.avatar = payload["avatar"].as_s?
+					u.perms = Array(String).new
+
+					payload["perms"].as_a.tap do |perms|
+						perms.each do |perm|
+							if perm.class == String
+								u.perms! << perm.as_s
+							end
+						end
+					end
+				end
+			end
+		end
+
+		call_next context
+	end
+end
+
+

src/main.cr

@@ -6,48 +6,33 @@ require "jwt"
 require "pg"
 require "crecto"
 
-MASTER_KEY = Random::Secure.base64
-authd_db_password_file = "db-password-file"
+require "./user.cr"
+
 authd_db_name = "authd"
 authd_db_hostname = "localhost"
 authd_db_user = "user"
+authd_db_password = "nico-nico-nii"
+authd_jwt_key = "nico-nico-nii"
 
 Kemal.config.extra_options do |parser|
-	parser.on "-d name", "--database-name name", "database name for authd" do |dbn|
-		authd_db_name = dbn
+	parser.on "-d name", "--database-name name", "Database name." do |name|
+		authd_db_name = name
 	end
 
-	parser.on "-u name", "--database-username user", "database user for authd" do |u|
-		authd_db_user = u
+	parser.on "-u name", "--database-username user", "Database user." do |name|
+		authd_db_user = name
 	end
 
-	parser.on "-a hostname", "--hostname host", "hostname for authd" do |h|
-		authd_db_hostname = h
+	parser.on "-a host", "--hostname host", "Database host name." do |host|
+		authd_db_hostname = host
 	end
 
-	parser.on "-P password-file", "--passfile file", "password file for authd" do |f|
-		authd_db_password_file = f
-	end
-end
-
-class User < Crecto::Model
-	schema "users" do # table name
-		field :username, String
-		field :realname, String
-		field :avatar, String
-		field :password, String
-		field :perms, Array(String)
+	parser.on "-P file", "--password-file file", "Password file." do |file_name|
+		authd_db_password = File.read(file_name).chomp
 	end
 
-	validate_required [:username, :password, :perms]
-
-	def to_h
-		{
-			:username => @username,
-			:realname => @realname,
-			:perms => @perms,
-			:avatar => @avatar
-		}
+	parser.on "-K file", "--key-file file", "JWT key file" do |file_name|
+		authd_jwt_key = File.read(file_name).chomp
 	end
 end
 
@@ -65,7 +50,7 @@ post "/token" do |env|
 		next halt env, status_code: 400, response: ({error: "Missing password."}.to_json)
 	end
 
-	user = MyRepo.get_by(User, username: username, password: password)
+	user = DataBase.get_by AuthD::User, username: username, password: password
 
 	if ! user
 		next halt env, status_code: 400, response: ({error: "Invalid user or password."}.to_json)
@@ -73,20 +58,29 @@ post "/token" do |env|
 
 	{
 		"status" => "success",
-		"token" => JWT.encode(user.to_h, MASTER_KEY, "HS256")
+		"token" => JWT.encode user.to_h, authd_jwt_key, "HS256"
 	}.to_json
 end
 
-module MyRepo
+module DataBase
 	extend Crecto::Repo
 end
 
 Kemal.run do
-	MyRepo.config do |conf|
+	DataBase.config do |conf|
 		conf.adapter = Crecto::Adapters::Postgres
 		conf.hostname = authd_db_hostname
 		conf.database = authd_db_name
 		conf.username = authd_db_user
-		conf.password = File.read authd_db_password_file
+		conf.password = authd_db_password
+	end
+
+	# Dummy query to check DB connection is possible.
+	begin
+		DataBase.all AuthD::User, Crecto::Repo::Query.new
+	rescue e
+		puts "Database connection failed: #{e.message}"
+
+		Kemal.stop
 	end
 end

src/user.cr

@@ -0,0 +1,25 @@
+
+require "pg"
+require "crecto"
+
+class AuthD::User < Crecto::Model
+	schema "users" do # table name
+		field :username, String
+		field :realname, String
+		field :avatar, String
+		field :password, String
+		field :perms, Array(String)
+	end
+
+	validate_required [:username, :password, :perms]
+
+	def to_h
+		{
+			:username => @username,
+			:realname => @realname,
+			:perms => @perms,
+			:avatar => @avatar
+		}
+	end
+end
+