#!/usr/bin/python
#

# Copyright (C) 2006, 2007, 2010, 2011 Google Inc.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301, USA.


"""Script for testing ganeti.utils.hash"""

import unittest
import random
import operator
import tempfile

from ganeti import constants
from ganeti import utils

import testutils


class TestHmacFunctions(unittest.TestCase):
  # Digests can be checked with "openssl sha1 -hmac $key"
  def testSha1Hmac(self):
    self.assertEqual(utils.Sha1Hmac("", ""),
                     "fbdb1d1b18aa6c08324b7d64b71fb76370690e1d")
    self.assertEqual(utils.Sha1Hmac("3YzMxZWE", "Hello World"),
                     "ef4f3bda82212ecb2f7ce868888a19092481f1fd")
    self.assertEqual(utils.Sha1Hmac("TguMTA2K", ""),
                     "f904c2476527c6d3e6609ab683c66fa0652cb1dc")

    longtext = 1500 * "The quick brown fox jumps over the lazy dog\n"
    self.assertEqual(utils.Sha1Hmac("3YzMxZWE", longtext),
                     "35901b9a3001a7cdcf8e0e9d7c2e79df2223af54")

  def testSha1HmacSalt(self):
    self.assertEqual(utils.Sha1Hmac("TguMTA2K", "", salt="abc0"),
                     "4999bf342470eadb11dfcd24ca5680cf9fd7cdce")
    self.assertEqual(utils.Sha1Hmac("TguMTA2K", "", salt="abc9"),
                     "17a4adc34d69c0d367d4ffbef96fd41d4df7a6e8")
    self.assertEqual(utils.Sha1Hmac("3YzMxZWE", "Hello World", salt="xyz0"),
                     "7f264f8114c9066afc9bb7636e1786d996d3cc0d")

  def testVerifySha1Hmac(self):
    self.assert_(utils.VerifySha1Hmac("", "", ("fbdb1d1b18aa6c08324b"
                                               "7d64b71fb76370690e1d")))
    self.assert_(utils.VerifySha1Hmac("TguMTA2K", "",
                                      ("f904c2476527c6d3e660"
                                       "9ab683c66fa0652cb1dc")))

    digest = "ef4f3bda82212ecb2f7ce868888a19092481f1fd"
    self.assert_(utils.VerifySha1Hmac("3YzMxZWE", "Hello World", digest))
    self.assert_(utils.VerifySha1Hmac("3YzMxZWE", "Hello World",
                                      digest.lower()))
    self.assert_(utils.VerifySha1Hmac("3YzMxZWE", "Hello World",
                                      digest.upper()))
    self.assert_(utils.VerifySha1Hmac("3YzMxZWE", "Hello World",
                                      digest.title()))

  def testVerifySha1HmacSalt(self):
    self.assert_(utils.VerifySha1Hmac("TguMTA2K", "",
                                      ("17a4adc34d69c0d367d4"
                                       "ffbef96fd41d4df7a6e8"),
                                      salt="abc9"))
    self.assert_(utils.VerifySha1Hmac("3YzMxZWE", "Hello World",
                                      ("7f264f8114c9066afc9b"
                                       "b7636e1786d996d3cc0d"),
                                      salt="xyz0"))


class TestFingerprintFiles(unittest.TestCase):
  def setUp(self):
    self.tmpfile = tempfile.NamedTemporaryFile()
    self.tmpfile2 = tempfile.NamedTemporaryFile()
    utils.WriteFile(self.tmpfile2.name, data="Hello World\n")
    self.results = {
      self.tmpfile.name: "da39a3ee5e6b4b0d3255bfef95601890afd80709",
      self.tmpfile2.name: "648a6a6ffffdaa0badb23b8baf90b6168dd16b3a",
      }

  def testSingleFile(self):
    self.assertEqual(utils.hash._FingerprintFile(self.tmpfile.name),
                     self.results[self.tmpfile.name])

    self.assertEqual(utils.hash._FingerprintFile("/no/such/file"), None)

  def testBigFile(self):
    self.tmpfile.write("A" * 8192)
    self.tmpfile.flush()
    self.assertEqual(utils.hash._FingerprintFile(self.tmpfile.name),
                     "35b6795ca20d6dc0aff8c7c110c96cd1070b8c38")

  def testMultiple(self):
    all_files = self.results.keys()
    all_files.append("/no/such/file")
    self.assertEqual(utils.FingerprintFiles(self.results.keys()), self.results)


if __name__ == "__main__":
  testutils.GanetiTestProgram()