/*
* Copyright 2010 Google Inc.
*
* 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 com.google.gwt.emultest.java.security;
import com.google.gwt.emultest.java.util.EmulTestBase;
import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
/**
* Tests the message digest implementations.
*/
public class MessageDigestTest extends EmulTestBase {
/**
* Pairs of strings: test data, then MD5 hash.
*/
private static String[] md5TestData = new String[] {
"",
"d41d8cd98f00b204e9800998ecf8427e",
"a",
"0cc175b9c0f1b6a831c399e269772661",
"abc",
"900150983cd24fb0d6963f7d28e17f72",
"message digest",
"f96b697d7cb7938d525a2f31aaf161d0",
"abcdefghijklmnopqrstuvwxyz",
"c3fcd3d76192e4007dfb496cca67e13b",
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789",
"d174ab98d277d9f5a5611c2c9f419d9f",
"12345678901234567890123456789012345678901234567890123456789012345678901234567890",
"57edf4a22be3c955ac49da2e2107b67a",
"s nine o'clock at night upon the second of August--the mostterrible August in "
+ "the history of the world. One might have thoughtalready that God's curse "
+ "hung heavy over a degenerate world, for therewas an awesome hush and a "
+ "feeling of vague expectancy in the sultry andstagnant air. The sun had "
+ "long set, but one blood-red gash like anopen wound lay low in the distant "
+ "west. Above, the stars were shiningbrightly, and below, the lights of the "
+ "shipping glimmered in the bay.The two famous Germans stood beside the stone "
+ "parapet of the gardenwalk, with the long, low, heavily gabled house behind "
+ "them, and theylooked down upon the broad sweep of the beach at the foot of "
+ "the greatchalk cliff in which Von Bork, like some wandering eagle, had "
+ "perchedhimself four years before. They stood with their heads close "
+ "together,talking in low, confidential tones. From below the two glowing "
+ "ends oftheir cigars might have been the smouldering eyes of some "
+ "malignantfiend looking down in the darkness.A remarkable man this Von Bork--a "
+ "man who could hardly be matched amongall the devoted agents of the Kaiser. "
+ "It was his talents which hadfirst recommended him for the English mission, "
+ "the most importantmission of all, but since he had taken it over those "
+ "talents had becomemore and more manifest to the half-dozen people in the "
+ "world who werereally in touch with the truth. One of these was his "
+ "presentcompanion, Baron Von Herling, the chief secretary of the legation,whose "
+ "huge 100-horse-power Benz car was blocking the country lane as itwaited to "
+ "waft its owner back to London.'So far as I can judge the trend of events, you "
+ "will probably be backin Berlin within the week,' the secretary was saying. "
+ "'When you getthere, my dear Von Bork, I think you will be surprised at the "
+ "welcomeyou will receive. I happen to know what is thought in the "
+ "highestquarters of your work in this country.' He was a huge man, "
+ "thesecretary, deep, broad, and tall, with",
"ae610cd119d74e5ac18c111d4a91ef3f",
};
private String[] sha256TestData = new String[] {
"",
"e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
"a",
"ca978112ca1bbdcafac231b39a23dc4da786eff8147c4e72b9807785afee48bb",
"abc",
"ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad",
"abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",
"248d6a61d20638b8e5c026930c3e6039a33ce45964ff2167f6ecedd419db06c1",
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789",
"db4bfcbd4da0cd85a60c3c37d3fbd8805c77f15fc6b1fdfe614ee0a7c8fdb4c0",
"a1y28pfxfkrb3dc0ysjzkc4ef5510a8fleg5nf7ld911lgl7n4bv09em",
"6ebf24d2f4ab987311418f72e5ddcb829bdd9f3e54593b6d22b14fb7fe639e4c",
"The SHA (Secure Hash Algorithm) is one of a number of cryptographic hash functions."
+ " A cryptographic hash is like a signature for a text or a data file."
+ " SHA-256 algorithm generates an almost-unique, fixed size 256-bit (32-byte) hash."
+ " Hash is a one way function – it cannot be decrypted back. This makes it suitable for"
+ " password validation, challenge hash authentication, anti-tamper, digital signatures.",
"d37e2b4fab26640551c69abc3bdf1c14534b215c7f3e1d44c0b65029c99147fb"
};
private static void assertDigest(String expected, MessageDigest md,
String data) throws UnsupportedEncodingException {
byte[] bytes = data.getBytes("UTF-8");
byte[] digest = md.digest(bytes);
assertEquals(expected, toHexString(digest));
}
private static void assertDigestByByte(String expected, MessageDigest md,
String data) throws UnsupportedEncodingException {
byte[] bytes = data.getBytes("UTF-8");
for (int i = 0; i < bytes.length; ++i) {
md.update(bytes[i]);
}
byte[] digest = md.digest();
assertEquals(expected, toHexString(digest));
}
private static String toHexString(byte[] bytes) {
StringBuilder buf = new StringBuilder();
for (int i = 0; i < bytes.length; ++i) {
String hex = Integer.toHexString(bytes[i] & 255);
buf.append("00".substring(hex.length())).append(hex);
}
return buf.toString();
}
public void testMd5() throws Exception {
MessageDigest md5 = MessageDigest.getInstance("MD5");
for (int i = 0; i < md5TestData.length; i += 2) {
assertDigest(md5TestData[i + 1], md5, md5TestData[i]);
}
}
public void testMd5ByBytes() throws Exception {
MessageDigest md5 = MessageDigest.getInstance("MD5");
for (int i = 0; i < md5TestData.length; i += 2) {
assertDigestByByte(md5TestData[i + 1], md5, md5TestData[i]);
}
}
public void testSHA256() throws Exception {
MessageDigest sha256 = MessageDigest.getInstance("SHA-256");
for (int i = 0; i < sha256TestData.length; i += 2) {
assertDigest(sha256TestData[i + 1], sha256, sha256TestData[i]);
}
}
public void testSHA256ByBytes() throws Exception {
MessageDigest sha256 = MessageDigest.getInstance("SHA-256");
for (int i = 0; i < sha256TestData.length; i += 2) {
assertDigestByByte(sha256TestData[i + 1], sha256, sha256TestData[i]);
}
}
}