// Copyright (c) 2006 Damien Miller <djm@mindrot.org>
//
// Permission to use, copy, modify, and distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

package es.uniovi.asw;

import org.mindrot.jbcrypt.BCrypt;
import junit.framework.TestCase;

/**
 * JUnit unit tests for BCrypt routines
 * @author Damien Miller
 * @version 0.2
 */
public class TestBCrypt extends TestCase {
	String test_vectors[][] = {
			{ "", 
			"$2a$06$DCq7YPn5Rq63x1Lad4cll.",
			"$2a$06$DCq7YPn5Rq63x1Lad4cll.TV4S6ytwfsfvkgY8jIucDrjc8deX1s." },
			{ "",
			"$2a$08$HqWuK6/Ng6sg9gQzbLrgb.",
			"$2a$08$HqWuK6/Ng6sg9gQzbLrgb.Tl.ZHfXLhvt/SgVyWhQqgqcZ7ZuUtye" },
			{ "",
			"$2a$10$k1wbIrmNyFAPwPVPSVa/ze",
			"$2a$10$k1wbIrmNyFAPwPVPSVa/zecw2BCEnBwVS2GbrmgzxFUOqW9dk4TCW" },
			{ "",
			"$2a$12$k42ZFHFWqBp3vWli.nIn8u",
			"$2a$12$k42ZFHFWqBp3vWli.nIn8uYyIkbvYRvodzbfbK18SSsY.CsIQPlxO" },
			{ "a",
			"$2a$06$m0CrhHm10qJ3lXRY.5zDGO",
			"$2a$06$m0CrhHm10qJ3lXRY.5zDGO3rS2KdeeWLuGmsfGlMfOxih58VYVfxe" },
			{ "a", 
			"$2a$08$cfcvVd2aQ8CMvoMpP2EBfe",
			"$2a$08$cfcvVd2aQ8CMvoMpP2EBfeodLEkkFJ9umNEfPD18.hUF62qqlC/V." },
			{ "a",
			"$2a$10$k87L/MF28Q673VKh8/cPi.",
			"$2a$10$k87L/MF28Q673VKh8/cPi.SUl7MU/rWuSiIDDFayrKk/1tBsSQu4u" },
			{ "a",
			"$2a$12$8NJH3LsPrANStV6XtBakCe",
			"$2a$12$8NJH3LsPrANStV6XtBakCez0cKHXVxmvxIlcz785vxAIZrihHZpeS" },
			{ "abc",
			"$2a$06$If6bvum7DFjUnE9p2uDeDu",
			"$2a$06$If6bvum7DFjUnE9p2uDeDu0YHzrHM6tf.iqN8.yx.jNN1ILEf7h0i" },
			{ "abc",
			"$2a$08$Ro0CUfOqk6cXEKf3dyaM7O",
			"$2a$08$Ro0CUfOqk6cXEKf3dyaM7OhSCvnwM9s4wIX9JeLapehKK5YdLxKcm" },
			{ "abc",
			"$2a$10$WvvTPHKwdBJ3uk0Z37EMR.",
			"$2a$10$WvvTPHKwdBJ3uk0Z37EMR.hLA2W6N9AEBhEgrAOljy2Ae5MtaSIUi" },
			{ "abc",
			"$2a$12$EXRkfkdmXn2gzds2SSitu.",
			"$2a$12$EXRkfkdmXn2gzds2SSitu.MW9.gAVqa9eLS1//RYtYCmB1eLHg.9q" },
			{ "abcdefghijklmnopqrstuvwxyz",
			"$2a$06$.rCVZVOThsIa97pEDOxvGu",
			"$2a$06$.rCVZVOThsIa97pEDOxvGuRRgzG64bvtJ0938xuqzv18d3ZpQhstC" },
			{ "abcdefghijklmnopqrstuvwxyz",
			"$2a$08$aTsUwsyowQuzRrDqFflhge",
			"$2a$08$aTsUwsyowQuzRrDqFflhgekJ8d9/7Z3GV3UcgvzQW3J5zMyrTvlz." },
			{ "abcdefghijklmnopqrstuvwxyz",
			"$2a$10$fVH8e28OQRj9tqiDXs1e1u",
			"$2a$10$fVH8e28OQRj9tqiDXs1e1uxpsjN0c7II7YPKXua2NAKYvM6iQk7dq" },
			{ "abcdefghijklmnopqrstuvwxyz",
			"$2a$12$D4G5f18o7aMMfwasBL7Gpu",
			"$2a$12$D4G5f18o7aMMfwasBL7GpuQWuP3pkrZrOAnqP.bmezbMng.QwJ/pG" },
			{ "~!@#$%^&*()      ~!@#$%^&*()PNBFRD",
			"$2a$06$fPIsBO8qRqkjj273rfaOI.",
			"$2a$06$fPIsBO8qRqkjj273rfaOI.HtSV9jLDpTbZn782DC6/t7qT67P6FfO" },
			{ "~!@#$%^&*()      ~!@#$%^&*()PNBFRD",
			"$2a$08$Eq2r4G/76Wv39MzSX262hu",
			"$2a$08$Eq2r4G/76Wv39MzSX262huzPz612MZiYHVUJe/OcOql2jo4.9UxTW" },
			{ "~!@#$%^&*()      ~!@#$%^&*()PNBFRD",
			"$2a$10$LgfYWkbzEvQ4JakH7rOvHe",
			"$2a$10$LgfYWkbzEvQ4JakH7rOvHe0y8pHKF9OaFgwUZ2q7W2FFZmZzJYlfS" },
			{ "~!@#$%^&*()      ~!@#$%^&*()PNBFRD",
			"$2a$12$WApznUOJfkEGSmYRfnkrPO",
			"$2a$12$WApznUOJfkEGSmYRfnkrPOr466oFDCaj4b6HY3EXGvfxm43seyhgC" },
		};

	/**
	 * Entry point for unit tests
	 * @param args unused
	 */
	public static void main(String[] args) {
		junit.textui.TestRunner.run(TestBCrypt.class);
	}

	/**
	 * Test method for 'BCrypt.hashpw(String, String)'
	 */
	public void testHashpw() {
		System.out.print("BCrypt.hashpw(): ");
		for (int i = 0; i < test_vectors.length; i++) {
			String plain = test_vectors[i][0];
			String salt = test_vectors[i][1];
			String expected = test_vectors[i][2];
			String hashed = BCrypt.hashpw(plain, salt);
			assertEquals(hashed, expected);
			System.out.print(".");
		}
		System.out.println("");
	}

	/**
	 * Test method for 'BCrypt.gensalt(int)'
	 */
	public void testGensaltInt() {
		System.out.print("BCrypt.gensalt(log_rounds):");
		for (int i = 4; i <= 12; i++) {
			System.out.print(" " + Integer.toString(i) + ":");
			for (int j = 0; j < test_vectors.length; j += 4) {
				String plain = test_vectors[j][0];
				String salt = BCrypt.gensalt(i);
				String hashed1 = BCrypt.hashpw(plain, salt);
				String hashed2 = BCrypt.hashpw(plain, hashed1);
				assertEquals(hashed1, hashed2);
				System.out.print(".");
			}
		}
		System.out.println("");
	}

	/**
	 * Test method for 'BCrypt.gensalt()'
	 */
	public void testGensalt() {
		System.out.print("BCrypt.gensalt(): ");
		for (int i = 0; i < test_vectors.length; i += 4) {
			String plain = test_vectors[i][0];
			String salt = BCrypt.gensalt();
			String hashed1 = BCrypt.hashpw(plain, salt);
			String hashed2 = BCrypt.hashpw(plain, hashed1);
			assertEquals(hashed1, hashed2);
			System.out.print(".");
		}
		System.out.println("");
	}

	/**
	 * Test method for 'BCrypt.checkpw(String, String)'
	 * expecting success
	 */
	public void testCheckpw_success() {
		System.out.print("BCrypt.checkpw w/ good passwords: ");
		for (int i = 0; i < test_vectors.length; i++) {
			String plain = test_vectors[i][0];
			String expected = test_vectors[i][2];
			assertTrue(BCrypt.checkpw(plain, expected));
			System.out.print(".");
		}
		System.out.println("");
	}

	/**
	 * Test method for 'BCrypt.checkpw(String, String)'
	 * expecting failure
	 */
	public void testCheckpw_failure() {
		System.out.print("BCrypt.checkpw w/ bad passwords: ");
		for (int i = 0; i < test_vectors.length; i++) {
			int broken_index = (i + 4) % test_vectors.length;
			String plain = test_vectors[i][0];
			String expected = test_vectors[broken_index][2];
			assertFalse(BCrypt.checkpw(plain, expected));
			System.out.print(".");
		}
		System.out.println("");
	}

	/**
	 * Test for correct hashing of non-US-ASCII passwords
	 */
	public void testInternationalChars() {
		System.out.print("BCrypt.hashpw w/ international chars: ");
		String pw1 = "\u2605\u2605\u2605\u2605\u2605\u2605\u2605\u2605";
		String pw2 = "????????";

		String h1 = BCrypt.hashpw(pw1, BCrypt.gensalt());
		assertFalse(BCrypt.checkpw(pw2, h1));
		System.out.print(".");

		String h2 = BCrypt.hashpw(pw2, BCrypt.gensalt());
		assertFalse(BCrypt.checkpw(pw1, h2));
		System.out.print(".");
		System.out.println("");
	}

}
