#!/usr/bin/env ruby

require 'test/unit'

require 'hmac-md5'
require 'hmac-sha1'

class TestHMAC < Test::Unit::TestCase

  def test_s_digest
    key = "\x0b" * 16
    text = "Hi There"

    hmac = HMAC::MD5.new(key)
    hmac.update(text)
    
    assert_equal(hmac.digest, HMAC::MD5.digest(key, text))
  end

  def test_s_hexdigest
    key = "\x0b" * 16
    text = "Hi There"

    hmac = HMAC::MD5.new(key)
    hmac.update(text)
    
    assert_equal(hmac.hexdigest, HMAC::MD5.hexdigest(key, text))
  end

  def test_hmac_md5_1
    assert_equal(HMAC::MD5.hexdigest("\x0b" * 16, "Hi There"),
		 "9294727a3638bb1c13f48ef8158bfc9d")
  end

  def test_hmac_md5_2
    assert_equal(HMAC::MD5.hexdigest("Jefe", "what do ya want for nothing?"),
		 "750c783e6ab0b503eaa86e310a5db738")
  end

  def test_hmac_md5_3
    assert_equal(HMAC::MD5.hexdigest("\xaa" * 16, "\xdd" * 50),
		 "56be34521d144c88dbb8c733f0e8b3f6")
  end

  def test_hmac_md5_4
    assert_equal(HMAC::MD5.hexdigest(["0102030405060708090a0b0c0d0e0f10111213141516171819"].pack("H*"), "\xcd" * 50),
		 "697eaf0aca3a3aea3a75164746ffaa79")
  end

  def test_hmac_md5_5
    assert_equal(HMAC::MD5.hexdigest("\x0c" * 16, "Test With Truncation"),
		 "56461ef2342edc00f9bab995690efd4c")
  end

#  def test_hmac_md5_6
#    assert_equal(HMAC::MD5.hexdigest("\x0c" * 16, "Test With Truncation"),
#		 "56461ef2342edc00f9bab995")
#  end

  def test_hmac_md5_7
    assert_equal(HMAC::MD5.hexdigest("\xaa" * 80, "Test Using Larger Than Block-Size Key - Hash Key First"),
		 "6b1ab7fe4bd7bf8f0b62e6ce61b9d0cd")
  end

  def test_hmac_md5_8
    assert_equal(HMAC::MD5.hexdigest("\xaa" * 80, "Test Using Larger Than Block-Size Key and Larger Than One Block-Size Data"),
		 "6f630fad67cda0ee1fb1f562db3aa53e")
  end

  def test_reset_key
    hmac = HMAC::MD5.new("key")
    assert_nothing_raised {
      hmac.reset_key
    }
    assert_raise(RuntimeError) {
      hmac.update("foo")
    }
  end

  def test_set_key
    hmac = HMAC::MD5.new
    assert_raise(RuntimeError) {
      hmac.update("foo")
    }
    assert_nothing_raised {
      hmac.reset_key
    }
    assert_raise(RuntimeError) {
      hmac.update("foo")
    }
  end
end