From 4d5b1fdcf019cf68058961aac72da2a28547581e Mon Sep 17 00:00:00 2001
From: karchnu <karchnu@karchnu.fr>
Date: Sat, 22 Sep 2018 17:08:28 +0000
Subject: [PATCH] initial commit

---
 db-password-file |  1 +
 shard.yml        | 29 +++++++++++++++
 src/main.cr      | 92 ++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 122 insertions(+)
 create mode 100644 db-password-file
 create mode 100644 shard.yml
 create mode 100644 src/main.cr

diff --git a/db-password-file b/db-password-file
new file mode 100644
index 0000000..82490f5
--- /dev/null
+++ b/db-password-file
@@ -0,0 +1 @@
+niconiconii
diff --git a/shard.yml b/shard.yml
new file mode 100644
index 0000000..f39318c
--- /dev/null
+++ b/shard.yml
@@ -0,0 +1,29 @@
+name: authd
+version: 0.1.0
+
+authors:
+  - Karchnu <karchnu@karchnu.fr>
+  - Luka Vandervelden <lukc@upyum.com>
+
+description: |
+    Web authentication daemon.
+
+targets:
+  authd:
+    main: src/main.cr
+
+crystal: 0.26
+
+dependencies:
+    kemal:
+        github: kemalcr/kemal
+        branch: master
+    jwt:
+        github: crystal-community/jwt
+        branch: master
+    pg:
+        github: will/crystal-pg
+    crecto:
+        github: fridgerator/crecto
+
+license: EUPL
diff --git a/src/main.cr b/src/main.cr
new file mode 100644
index 0000000..2082b6e
--- /dev/null
+++ b/src/main.cr
@@ -0,0 +1,92 @@
+require "uuid"
+
+require "kemal"
+require "jwt"
+
+require "pg"
+require "crecto"
+
+MASTER_KEY = Random::Secure.base64
+authd_db_password_file = "db-password-file"
+authd_db_name = "authd"
+authd_db_hostname = "localhost"
+authd_db_user = "user"
+
+Kemal.config.extra_options do |parser|
+	parser.on "-d name", "--database-name name", "database name for authd" do |dbn|
+		authd_db_name = dbn
+	end
+
+	parser.on "-u name", "--database-username user", "database user for authd" do |u|
+		authd_db_user = u
+	end
+
+	parser.on "-a hostname", "--hostname host", "hostname for authd" do |h|
+		authd_db_hostname = h
+	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)
+	end
+
+	validate_required [:username, :password, :perms]
+
+	def to_h
+		{
+			:username => @username,
+			:realname => @realname,
+			:perms => @perms,
+			:avatar => @avatar
+		}
+	end
+end
+
+post "/token" do |env|
+	env.response.content_type = "application/json"
+
+	username = env.params.json["username"]?
+	password = env.params.json["password"]?
+
+	if ! username.is_a? String
+		next halt env, status_code: 400, response: ({error: "Missing username."}.to_json)
+	end
+
+	if ! password.is_a? String
+		next halt env, status_code: 400, response: ({error: "Missing password."}.to_json)
+	end
+
+	user = MyRepo.get_by(User, username: username, password: password)
+
+	if ! user
+		next halt env, status_code: 400, response: ({error: "Invalid user or password."}.to_json)
+	end
+
+	{
+		"status" => "success",
+		"token" => JWT.encode(user.to_h, MASTER_KEY, "HS256")
+	}.to_json
+end
+
+module MyRepo
+	extend Crecto::Repo
+end
+
+Kemal.run do
+	MyRepo.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
+	end
+end