/*
 * Copyright 2004, 2005, 2006 Acegi Technology Pty Limited
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.security.ldap.authentication;

import static org.assertj.core.api.Assertions.*;

import org.junit.Before;
import org.junit.Test;
import org.springframework.security.authentication.encoding.LdapShaPasswordEncoder;

/**
 * Tests {@link LdapShaPasswordEncoder}.
 *
 * @author Luke Taylor
 */
public class LdapShaPasswordEncoderTests {
	// ~ Instance fields
	// ================================================================================================

	LdapShaPasswordEncoder sha;

	// ~ Methods
	// ========================================================================================================

	@Before
	public void setUp() throws Exception {
		sha = new LdapShaPasswordEncoder();
	}

	@Test
	public void invalidPasswordFails() {
		assertThat(sha.isPasswordValid("{SHA}ddSFGmjXYPbZC+NXR2kCzBRjqiE=",
				"wrongpassword", null)).isFalse();
	}

	@Test
	public void invalidSaltedPasswordFails() {
		assertThat(sha.isPasswordValid("{SSHA}25ro4PKC8jhQZ26jVsozhX/xaP0suHgX",
				"wrongpassword", null)).isFalse();
		assertThat(sha.isPasswordValid("{SSHA}PQy2j+6n5ytA+YlAKkM8Fh4p6u2JxfVd",
				"wrongpassword", null)).isFalse();
	}

	@Test(expected = IllegalArgumentException.class)
	public void nonByteArraySaltThrowsException() {
		sha.encodePassword("password", "AStringNotAByteArray");
	}

	/**
	 * Test values generated by 'slappasswd -h {SHA} -s boabspasswurd'
	 */
	@Test
	public void validPasswordSucceeds() {
		sha.setForceLowerCasePrefix(false);
		assertThat(sha.isPasswordValid("{SHA}ddSFGmjXYPbZC+NXR2kCzBRjqiE=",
				"boabspasswurd", null)).isTrue();
		assertThat(sha.isPasswordValid("{sha}ddSFGmjXYPbZC+NXR2kCzBRjqiE=",
				"boabspasswurd", null)).isTrue();
		sha.setForceLowerCasePrefix(true);
		assertThat(sha.isPasswordValid("{SHA}ddSFGmjXYPbZC+NXR2kCzBRjqiE=",
				"boabspasswurd", null)).isTrue();
		assertThat(sha.isPasswordValid("{sha}ddSFGmjXYPbZC+NXR2kCzBRjqiE=",
				"boabspasswurd", null)).isTrue();
	}

	/**
	 * Test values generated by 'slappasswd -s boabspasswurd'
	 */
	@Test
	public void validSaltedPasswordSucceeds() {
		sha.setForceLowerCasePrefix(false);
		assertThat(sha.isPasswordValid("{SSHA}25ro4PKC8jhQZ26jVsozhX/xaP0suHgX",
				"boabspasswurd", null)).isTrue();
		assertThat(sha.isPasswordValid("{ssha}PQy2j+6n5ytA+YlAKkM8Fh4p6u2JxfVd",
				"boabspasswurd", null)).isTrue();
		sha.setForceLowerCasePrefix(true);
		assertThat(sha.isPasswordValid("{SSHA}25ro4PKC8jhQZ26jVsozhX/xaP0suHgX",
				"boabspasswurd", null)).isTrue();
		assertThat(sha.isPasswordValid("{ssha}PQy2j+6n5ytA+YlAKkM8Fh4p6u2JxfVd",
				"boabspasswurd", null)).isTrue();
	}

	@Test
	// SEC-1031
	public void fullLengthOfHashIsUsedInComparison() throws Exception {
		// Change the first hash character from '2' to '3'
		assertThat(sha.isPasswordValid("{SSHA}35ro4PKC8jhQZ26jVsozhX/xaP0suHgX",
				"boabspasswurd", null)).isFalse();
		// Change the last hash character from 'X' to 'Y'
		assertThat(sha.isPasswordValid("{SSHA}25ro4PKC8jhQZ26jVsozhX/xaP0suHgY",
				"boabspasswurd", null)).isFalse();
	}

	@Test
	public void correctPrefixCaseIsUsed() {
		sha.setForceLowerCasePrefix(false);
		assertThat("{SHA}ddSFGmjXYPbZC+NXR2kCzBRjqiE=").isEqualTo(
				sha.encodePassword("boabspasswurd", null));
		assertThat(sha.encodePassword("somepassword", "salt".getBytes()).startsWith(
				"{SSHA}"));

		sha.setForceLowerCasePrefix(true);
		assertThat("{sha}ddSFGmjXYPbZC+NXR2kCzBRjqiE=").isEqualTo(
				sha.encodePassword("boabspasswurd", null));
		assertThat(sha.encodePassword("somepassword", "salt".getBytes()).startsWith(
				"{ssha}"));

	}

	@Test(expected = IllegalArgumentException.class)
	public void invalidPrefixIsRejected() {
		sha.isPasswordValid("{MD9}xxxxxxxxxx", "somepassword", null);
	}

	@Test(expected = IllegalArgumentException.class)
	public void malformedPrefixIsRejected() {
		// No right brace
		sha.isPasswordValid("{SSHA25ro4PKC8jhQZ26jVsozhX/xaP0suHgX", "somepassword", null);
	}
}
