12 files changed, 123 insertions(+), 7 deletions(-)

A spec/webauthn/public_key_credential/creation_options_spec.cr
A spec/webauthn/public_key_credential/user_spec.cr
M spec/webauthn_spec.cr
M src/webauthn.cr
A src/webauthn/base64.cr
A src/webauthn/credential.cr
A src/webauthn/public_key_credential/creation_options.cr
A src/webauthn/public_key_credential/entity.cr
A src/webauthn/public_key_credential/options.cr
A src/webauthn/public_key_credential/relying_party.cr
A src/webauthn/public_key_credential/rp_entity.cr
A src/webauthn/public_key_credential/user.cr

@@ 0,0 1,13 @@
+require "../../spec_helper"
+
+describe WebAuthn::PublicKeyCredential::CreationOptions do
+  describe "#to_json" do
+    it "encodes to json" do
+      user = WebAuthn::PublicKeyCredential::User.new(id: "something", name: "the user", display_name: "User 1")
+      rp = WebAuthn::PublicKeyCredential::RPEntity.new(id: "something", name: "rep")
+      creation_options = WebAuthn::PublicKeyCredential::CreationOptions.new(rp: rp, user: user)
+
+      creation_options.to_json.should be_a(String)
+    end
+  end
+end

@@ 0,0 1,25 @@
+require "../../spec_helper"
+
+describe WebAuthn::PublicKeyCredential::User do
+  describe "#to_json" do
+    it "encodes to json" do
+      user = WebAuthn::PublicKeyCredential::User.new(id: "something",
+        name: "the user",
+        display_name: "User 1")
+
+      user.to_json.should be_a(String)
+    end
+  end
+
+  describe "#from_json" do
+    it "decodes a JSON payload" do
+      user_json = %({"name":"the user","id":"c29tZXRoaW5n","displayName":"User 1"})
+
+      user = WebAuthn::PublicKeyCredential::User.from_json(user_json)
+
+      user.id.should eq("something")
+      user.name.should eq("the user")
+      user.display_name.should eq("User 1")
+    end
+  end
+end

@@ 1,9 1,14 @@
 require "./spec_helper"
 
-describe Webauthn do
-  # TODO: Write tests
+describe WebAuthn do
+  describe "#generate_user_id" do
+    it "generates a spec-compliant user ID" do
+      user_id = WebAuthn.generate_user_id
 
-  it "works" do
-    false.should eq(true)
+      user_id.should be_a(String)
+
+      # As specified, the generate user id should not contain equals
+      user_id.should_not end_with("=")
+    end
   end
 end

@@ 1,6 1,18 @@
-# TODO: Write documentation for `Webauthn`
-module Webauthn
+require "io"
+require "json"
+require "random"
+
+require "./webauthn/**"
+
+# TODO: Write documentation for `WebAuthn`
+module WebAuthn
   VERSION = "0.1.0"
 
-  # TODO: Put your code here
+  # Generates a [WebAuthn User Handle][1] that follows the WebAuthn spec
+  # recommendations.
+  #
+  # [1]: https://www.w3.org/TR/webauthn-2/#user-handle
+  def self.generate_user_id : String
+    Random::Secure.urlsafe_base64(64, false)
+  end
 end

@@ 0,0 1,10 @@
+class WebAuthn::Base64
+  def self.from_json(pull : JSON::PullParser)
+    string = pull.read_string
+    ::Base64.decode_string(string)
+  end
+
+  def self.to_json(value : String, json : JSON::Builder)
+    ::Base64.urlsafe_encode(value, false).to_json(json)
+  end
+end

@@ 0,0 1,4 @@
+module WebAuthn::Credential
+  def self.options_for_create
+  end
+end

@@ 0,0 1,9 @@
+class WebAuthn::PublicKeyCredential::CreationOptions
+  include JSON::Serializable
+
+  getter rp : WebAuthn::PublicKeyCredential::RPEntity
+  getter user : WebAuthn::PublicKeyCredential::User
+
+  def initialize(@rp, @user)
+  end
+end

@@ 0,0 1,6 @@
+class WebAuthn::PublicKeyCredential::Entity
+  include JSON::Serializable
+
+  @[JSON::Field(key: "name")]
+  getter name : String
+end

@@ 0,0 1,10 @@
+abstract class Options
+  CHALLENGE_LENGTH = 32
+
+  abstract def to_json : String
+  abstract def to_json(io : IO)
+
+  def challenge : String
+    @challenge ||= Random::Secure.urlsafe_base64(CHALLENGE_LENGTH, false)
+  end
+end

@@ 0,0 1,2 @@
+class WebAuthn::PublicKeyCredential::RelyingParty
+end

@@ 0,0 1,8 @@
+class WebAuthn::PublicKeyCredential::RPEntity < WebAuthn::PublicKeyCredential::Entity
+  include JSON::Serializable
+
+  getter id : String
+
+  def initialize(@name, @id)
+  end
+end

@@ 0,0 1,12 @@
+class WebAuthn::PublicKeyCredential::User < WebAuthn::PublicKeyCredential::Entity
+  include JSON::Serializable
+
+  @[JSON::Field(key: "id", converter: WebAuthn::Base64)]
+  getter id : String
+
+  @[JSON::Field(key: "displayName")]
+  getter display_name : String
+
+  def initialize(@id, @name, @display_name)
+  end
+end