From e4b82e7a3e6c7522595b5fc48b4fe73501808301 Mon Sep 17 00:00:00 2001
From: ItsANameToo <35610748+ItsANameToo@users.noreply.github.com>
Date: Fri, 13 Jul 2018 05:08:42 +0200
Subject: [PATCH] feat: message verification (#7)

* feat: initial step for verifying messages

* add mesage hash generation

* message verification attempt

* refactor: move message.ex to correct folder

* feat: message verification

* test: add message signing and verification test
---
 .gitignore                               |  3 +++
 lib/{ => arkecosystem/crypto}/message.ex |  4 +---
 test/crypto/message_test.exs             | 19 +++++++++++++++++++
 3 files changed, 23 insertions(+), 3 deletions(-)
 rename lib/{ => arkecosystem/crypto}/message.ex (86%)
 create mode 100644 test/crypto/message_test.exs

diff --git a/.gitignore b/.gitignore
index b6c0b07..11e4821 100644
--- a/.gitignore
+++ b/.gitignore
@@ -24,3 +24,6 @@ ark_elixir-*.tar
 
 # Ignore package lock file
 mix.lock
+
+# Ignore osx .DS_Store
+.DS_Store
diff --git a/lib/message.ex b/lib/arkecosystem/crypto/message.ex
similarity index 86%
rename from lib/message.ex
rename to lib/arkecosystem/crypto/message.ex
index 1a40e6b..e58c242 100644
--- a/lib/message.ex
+++ b/lib/arkecosystem/crypto/message.ex
@@ -12,8 +12,6 @@ defmodule ArkEcosystem.Crypto.Message do
 
   @spec verify(String.t(), String.t(), String.t()) :: Boolean.t()
   def verify(message, signature, public_key) do
-    IO.puts(message)
-    IO.puts(signature)
-    IO.puts(public_key)
+    EcKey.verify(message, signature, public_key)
   end
 end
diff --git a/test/crypto/message_test.exs b/test/crypto/message_test.exs
new file mode 100644
index 0000000..5b14727
--- /dev/null
+++ b/test/crypto/message_test.exs
@@ -0,0 +1,19 @@
+defmodule ArkEcosystem.Crypto.MessageTest do
+  use ExUnit.Case, async: false
+  alias ArkEcosystem.Crypto.Message
+
+  test "should be able to sign a message" do
+    signed = Message.sign("hello", "world")
+    assert(signed[:message] == "hello")
+    assert(signed[:publickey] == "039b101edcbe1ee37ff6b2318526a425b629e823d7d8d9154417880595a28000ee")
+    assert(signed[:signature] == "3045022100ff2007e57064946fb80f4280dca2a9d312c8ec9a101f706700eae732947b65f302207a6a0fbd07d4084aba6dcd53d0c3ef531bd42d0281079323709ac2026420a8a7")
+  end
+
+  test "should be able to verify a message" do
+    signed = Message.sign("hello", "world")
+    assert(Message.verify(signed[:message], signed[:signature], signed[:publickey]) == true)
+    # Change last character of signature, as verify should then return false 
+    assert(Message.verify(signed[:message], "3045022100ff2007e57064946fb80f4280dca2a9d312c8ec9a101f706700eae732947b65f302207a6a0fbd07d4084aba6dcd53d0c3ef531bd42d0281079323709ac2026420a8a2", signed[:publickey]) == false)
+  end
+
+end