argon2 20151206 (new formula)

Closes Homebrew/homebrew#48019.

Signed-off-by: Baptiste Fontaine <batifon@yahoo.fr>

Formula/argon2.rb

@@ -0,0 +1,18 @@
+class Argon2 < Formula
+  desc "Password hashing library and CLI utility"
+  homepage "https://github.com/P-H-C/phc-winner-argon2"
+  url "https://github.com/P-H-C/phc-winner-argon2/archive/20151206.tar.gz"
+  sha256 "29f9eb6d84bfe29604c48830432aa030e96158d66e85a2c83b115e29eb025e85"
+
+  def install
+    system "make"
+    include.install "src/argon2.h"
+    lib.install "libargon2.dylib"
+    bin.install "argon2"
+  end
+
+  test do
+    assert_equal "$argon2i$m=65536,t=2,p=4$c29tZXNhbHQAAAAAAAAAAA$Q38e04oLanBHl/MHZra3ypCikyWHhVYRVbekTeGl03o\n",
+      pipe_output("echo -n password | #{bin}/argon2 somesalt -t 2 -m 16 -p 4 | grep Encoded | awk '{print $2}'")
+  end
+end