Updated deps, upped work factor, add timing tests

mark.george / BouncyScrypt

Browse code Updated deps, upped work factor, add timing tests master
1 parent 793e4c9 commit 4af74161a37d20c56cf4971d74fc178770fd429e Chris Edwards authored on 9 Jul 2021

Patch

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Ignore Space Show notes View build.gradle
plugins { id 'java' } repositories { mavenCentral() } dependencies { implementation group: 'org.bouncycastle', name: 'bcprov-jdk15on', version: '1.69' testImplementation group: 'junit', name: 'junit', version: '4.13.2' testImplementation group: 'org.hamcrest', name: 'hamcrest', version: '2.2' } plugins { id 'java' } repositories { jcenter() } dependencies { compile group: 'org.bouncycastle', name: 'bcprov-jdk15on', version: '1.66' testImplementation group: 'junit', name: 'junit', version: '4.12' testImplementation group: 'org.hamcrest', name: 'hamcrest-library', version: '1.3' } test.onlyIf { project.gradle.startParameter.taskNames.contains(':test'); }

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build.gradle

Ignore Space Show notes View src/main/java/helpers/ScryptHelper.java
package helpers; import java.nio.ByteBuffer; import java.nio.CharBuffer; import java.nio.charset.Charset; import java.nio.charset.StandardCharsets; import java.security.NoSuchAlgorithmException; import java.security.SecureRandom; import java.util.Arrays; import java.util.Base64; import java.util.regex.Matcher; import java.util.regex.Pattern; import org.bouncycastle.crypto.generators.SCrypt; /** * Wrapper for Bouncy Castle's scrypt implementation. * * Generates salted scrypt hashes in a format similar to Modular Crypt Format * (MCF). * * @author Mark George <mark.george@otago.ac.nz> / public final class ScryptHelper { // the standard work factors for scrypt private static final int N = 32768; private static final int r = 8; private static final int p = 1; private static final int saltSize = 64; private static final int dkLen = 64; private static final Charset utf8 = StandardCharsets.UTF_8; private ScryptHelper() { } /* * Generates an MCF-like formatted salted scrypt hash for the password. * * @param password The password to hash. * @return The MCF formatted hash. / public static CharBuffer hash(CharSequence password) { byte[] salt = salt(); byte[] hash = hash(password, salt, N, r, p, dkLen); Base64.Encoder b64encoder = Base64.getEncoder(); int costParams = (log2(N)) << 16 \| r << 8 \| p; byte[] dollar = "$".getBytes(utf8); byte[] params = String.valueOf(costParams).getBytes(utf8); byte[] b64salt = b64encoder.encode(salt); byte[] b64hash = b64encoder.encode(hash); int size = (4 dollar.length) + params.length + b64salt.length + b64hash.length; ByteBuffer mcf = ByteBuffer.allocate(size); mcf.put(dollar).put(params); mcf.put(dollar).put(b64salt); mcf.put(dollar).put(b64hash); mcf.put(dollar); mcf.flip(); CharBuffer result = utf8.decode(mcf); Arrays.fill(hash, (byte) 0); Arrays.fill(salt, (byte) 0); Arrays.fill(b64hash, (byte) 0); Arrays.fill(b64salt, (byte) 0); Arrays.fill(mcf.array(), (byte) 0); return result; } /** * Checks a hash (as generated by the hash method) against a password. * * @param mcfHash The MCF formatted hash. * @param password The password. * * @return True if the password matches the hash, false if not. / public static boolean check(CharSequence mcfHash, CharSequence password) { Pattern regex = Pattern.compile("\\$(\\d+?)\\$(.+?)\\$(.+?)\\$"); Matcher matcher = regex.matcher(mcfHash); if (matcher.matches()) { int costParams = Integer.parseInt(matcher.group(1)); Base64.Decoder decoder = Base64.getDecoder(); byte[] salt = decoder.decode(matcher.group(2)); byte[] hash = decoder.decode(matcher.group(3)); int hN = 1 << (costParams >> 16); int hr = costParams >> 8 & 255; int hp = costParams & 255; byte[] cHash = hash(password, salt, hN, hr, hp, hash.length); for (int i = 0; i < cHash.length; i++) { if (cHash[i] != hash[i]) { return false; } } return true; } else { throw new IllegalArgumentException("Hash is not in a recognisable format!"); } } static byte[] hash(CharSequence password, byte[] salt, int N, int r, int p, int dkLen) { return SCrypt.generate(toBytes(password), salt, N, r, p, dkLen); } private static byte[] salt() { try { byte[] salt = new byte[saltSize]; SecureRandom.getInstance("SHA1PRNG").nextBytes(salt); return salt; } catch (NoSuchAlgorithmException ex) { throw new IllegalStateException("SHA1PRNG not supported on this JVM!", ex); } } private static int log2(int operand) { double log2 = Math.log(operand) / Math.log(2); if (log2 % 1 != 0) { throw new IllegalArgumentException("N must be a power of 2."); } else { return Math.toIntExact(Math.round(log2)); } } / * Source: https://stackoverflow.com/a/9670279 / private static byte[] toBytes(CharSequence chars) { CharBuffer charBuffer = CharBuffer.wrap(chars); ByteBuffer byteBuffer = utf8.encode(charBuffer); byte[] bytes = Arrays.copyOfRange(byteBuffer.array(), byteBuffer.position(), byteBuffer.limit()); Arrays.fill(byteBuffer.array(), (byte) 0); return bytes; } } package helpers; import java.nio.ByteBuffer; import java.nio.CharBuffer; import java.nio.charset.Charset; import java.nio.charset.StandardCharsets; import java.security.NoSuchAlgorithmException; import java.security.SecureRandom; import java.util.Arrays; import java.util.Base64; import java.util.regex.Matcher; import java.util.regex.Pattern; import org.bouncycastle.crypto.generators.SCrypt; /* * Wrapper for Bouncy Castle's scrypt implementation. * * Generates salted scrypt hashes in a format similar to Modular Crypt Format * (MCF). * * @author Mark George <mark.george@otago.ac.nz> / public final class ScryptHelper { // the standard work factors for scrypt private static final int N = 16384; private static final int r = 8; private static final int p = 1; private static final int saltSize = 64; private static final int dkLen = 64; private static final Charset utf8 = StandardCharsets.UTF_8; private ScryptHelper() { } /* * Generates an MCF-like formatted salted scrypt hash for the password. * * @param password The password to hash. * @return The MCF formatted hash. / public static CharBuffer hash(CharSequence password) { byte[] salt = salt(); byte[] hash = hash(password, salt, N, r, p, dkLen); Base64.Encoder b64encoder = Base64.getEncoder(); int costParams = (log2(N)) << 16 \| r << 8 \| p; byte[] dollar = "$".getBytes(utf8); byte[] params = String.valueOf(costParams).getBytes(utf8); byte[] b64salt = b64encoder.encode(salt); byte[] b64hash = b64encoder.encode(hash); int size = (4 dollar.length) + params.length + b64salt.length + b64hash.length; ByteBuffer mcf = ByteBuffer.allocate(size); mcf.put(dollar).put(params); mcf.put(dollar).put(b64salt); mcf.put(dollar).put(b64hash); mcf.put(dollar); mcf.flip(); CharBuffer result = utf8.decode(mcf); Arrays.fill(hash, (byte) 0); Arrays.fill(salt, (byte) 0); Arrays.fill(b64hash, (byte) 0); Arrays.fill(b64salt, (byte) 0); Arrays.fill(mcf.array(), (byte) 0); return result; } /** * Checks a hash (as generated by the hash method) against a password. * * @param mcfHash The MCF formatted hash. * @param password The password. * * @return True if the password matches the hash, false if not. / public static boolean check(CharSequence mcfHash, CharSequence password) { Pattern regex = Pattern.compile("\\$(\\d+?)\\$(.+?)\\$(.+?)\\$"); Matcher matcher = regex.matcher(mcfHash); if (matcher.matches()) { int costParams = Integer.parseInt(matcher.group(1)); Base64.Decoder decoder = Base64.getDecoder(); byte[] salt = decoder.decode(matcher.group(2)); byte[] hash = decoder.decode(matcher.group(3)); int hN = 1 << (costParams >> 16); int hr = costParams >> 8 & 255; int hp = costParams & 255; byte[] cHash = hash(password, salt, hN, hr, hp, hash.length); for (int i = 0; i < cHash.length; i++) { if (cHash[i] != hash[i]) { return false; } } return true; } else { throw new IllegalArgumentException("Hash is not in a recognisable format!"); } } static byte[] hash(CharSequence password, byte[] salt, int N, int r, int p, int dkLen) { return SCrypt.generate(toBytes(password), salt, N, r, p, dkLen); } private static byte[] salt() { try { byte[] salt = new byte[saltSize]; SecureRandom.getInstance("SHA1PRNG").nextBytes(salt); return salt; } catch (NoSuchAlgorithmException ex) { throw new IllegalStateException("SHA1PRNG not supported on this JVM!", ex); } } private static int log2(int operand) { double log2 = Math.log(operand) / Math.log(2); if (log2 % 1 != 0) { throw new IllegalArgumentException("N must be a power of 2."); } else { return Math.toIntExact(Math.round(log2)); } } / * Source: https://stackoverflow.com/a/9670279 */ private static byte[] toBytes(CharSequence chars) { CharBuffer charBuffer = CharBuffer.wrap(chars); ByteBuffer byteBuffer = utf8.encode(charBuffer); byte[] bytes = Arrays.copyOfRange(byteBuffer.array(), byteBuffer.position(), byteBuffer.limit()); Arrays.fill(byteBuffer.array(), (byte) 0); return bytes; } }

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src/main/java/helpers/ScryptHelper.java

package helpers;

import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.nio.charset.Charset;
import java.nio.charset.StandardCharsets;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import java.util.Arrays;
import java.util.Base64;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.bouncycastle.crypto.generators.SCrypt;

/**
 * Wrapper for Bouncy Castle's scrypt implementation.
 *
 * Generates salted scrypt hashes in a format similar to Modular Crypt Format
 * (MCF).
 *
 * @author Mark George <mark.george@otago.ac.nz>
 */
public final class ScryptHelper {

// the standard work factors for scrypt
	private static final int N = 32768;
	private static final int r = 8;
	private static final int p = 1;

private static final int saltSize = 64;
	private static final int dkLen = 64;

private static final Charset utf8 = StandardCharsets.UTF_8;

private ScryptHelper() {
	}

/**
	 * Generates an MCF-like formatted salted scrypt hash for the password.
	 *
	 * @param password The password to hash.
	 * @return The MCF formatted hash.
	 */
	public static CharBuffer hash(CharSequence password) {
		byte[] salt = salt();
		byte[] hash = hash(password, salt, N, r, p, dkLen);

Base64.Encoder b64encoder = Base64.getEncoder();

int costParams = (log2(N)) << 16 | r << 8 | p;
		byte[] dollar = "$".getBytes(utf8);
		byte[] params = String.valueOf(costParams).getBytes(utf8);
		byte[] b64salt = b64encoder.encode(salt);
		byte[] b64hash = b64encoder.encode(hash);

int size = (4 * dollar.length) + params.length + b64salt.length + b64hash.length;

ByteBuffer mcf = ByteBuffer.allocate(size);
		mcf.put(dollar).put(params);
		mcf.put(dollar).put(b64salt);
		mcf.put(dollar).put(b64hash);
		mcf.put(dollar);
		mcf.flip();

CharBuffer result = utf8.decode(mcf);

Arrays.fill(hash, (byte) 0);
		Arrays.fill(salt, (byte) 0);
		Arrays.fill(b64hash, (byte) 0);
		Arrays.fill(b64salt, (byte) 0);
		Arrays.fill(mcf.array(), (byte) 0);

return result;
	}

/**
	 * Checks a hash (as generated by the hash method) against a password.
	 *
	 * @param mcfHash The MCF formatted hash.
	 * @param password The password.
	 *
	 * @return True if the password matches the hash, false if not.
	 */
	public static boolean check(CharSequence mcfHash, CharSequence password) {

Pattern regex = Pattern.compile("\\$(\\d+?)\\$(.+?)\\$(.+?)\\$");

Matcher matcher = regex.matcher(mcfHash);

if (matcher.matches()) {
			int costParams = Integer.parseInt(matcher.group(1));

Base64.Decoder decoder = Base64.getDecoder();

byte[] salt = decoder.decode(matcher.group(2));
			byte[] hash = decoder.decode(matcher.group(3));

int hN = 1 << (costParams >> 16);
			int hr = costParams >> 8 & 255;
			int hp = costParams & 255;

byte[] cHash = hash(password, salt, hN, hr, hp, hash.length);

for (int i = 0; i < cHash.length; i++) {
				if (cHash[i] != hash[i]) {
					return false;
				}
			}

return true;

} else {
			throw new IllegalArgumentException("Hash is not in a recognisable format!");
		}

}

static byte[] hash(CharSequence password, byte[] salt, int N, int r, int p, int dkLen) {
		return SCrypt.generate(toBytes(password), salt, N, r, p, dkLen);
	}

private static byte[] salt() {
		try {
			byte[] salt = new byte[saltSize];
			SecureRandom.getInstance("SHA1PRNG").nextBytes(salt);
			return salt;
		} catch (NoSuchAlgorithmException ex) {
			throw new IllegalStateException("SHA1PRNG not supported on this JVM!", ex);
		}
	}

private static int log2(int operand) {
		double log2 = Math.log(operand) / Math.log(2);
		if (log2 % 1 != 0) {
			throw new IllegalArgumentException("N must be a power of 2.");
		} else {
			return Math.toIntExact(Math.round(log2));
		}
	}

/*
	 * Source: https://stackoverflow.com/a/9670279
	 */
	private static byte[] toBytes(CharSequence chars) {
		CharBuffer charBuffer = CharBuffer.wrap(chars);
		ByteBuffer byteBuffer = utf8.encode(charBuffer);
		byte[] bytes = Arrays.copyOfRange(byteBuffer.array(), byteBuffer.position(), byteBuffer.limit());
		Arrays.fill(byteBuffer.array(), (byte) 0);
		return bytes;
	}

}

package helpers;

// the standard work factors for scrypt
	private static final int N = 16384;
	private static final int r = 8;
	private static final int p = 1;

private static final int saltSize = 64;
	private static final int dkLen = 64;

private static final Charset utf8 = StandardCharsets.UTF_8;

private ScryptHelper() {
	}

Base64.Encoder b64encoder = Base64.getEncoder();

int size = (4 * dollar.length) + params.length + b64salt.length + b64hash.length;

ByteBuffer mcf = ByteBuffer.allocate(size);
		mcf.put(dollar).put(params);
		mcf.put(dollar).put(b64salt);
		mcf.put(dollar).put(b64hash);
		mcf.put(dollar);
		mcf.flip();

CharBuffer result = utf8.decode(mcf);

Arrays.fill(hash, (byte) 0);
		Arrays.fill(salt, (byte) 0);
		Arrays.fill(b64hash, (byte) 0);
		Arrays.fill(b64salt, (byte) 0);
		Arrays.fill(mcf.array(), (byte) 0);

return result;
	}

Pattern regex = Pattern.compile("\\$(\\d+?)\\$(.+?)\\$(.+?)\\$");

Matcher matcher = regex.matcher(mcfHash);

if (matcher.matches()) {
			int costParams = Integer.parseInt(matcher.group(1));

Base64.Decoder decoder = Base64.getDecoder();

byte[] salt = decoder.decode(matcher.group(2));
			byte[] hash = decoder.decode(matcher.group(3));

int hN = 1 << (costParams >> 16);
			int hr = costParams >> 8 & 255;
			int hp = costParams & 255;

byte[] cHash = hash(password, salt, hN, hr, hp, hash.length);

for (int i = 0; i < cHash.length; i++) {
				if (cHash[i] != hash[i]) {
					return false;
				}
			}

return true;

} else {
			throw new IllegalArgumentException("Hash is not in a recognisable format!");
		}

}

static byte[] hash(CharSequence password, byte[] salt, int N, int r, int p, int dkLen) {
		return SCrypt.generate(toBytes(password), salt, N, r, p, dkLen);
	}

}

Ignore Space Show notes View src/test/java/helpers/TestScryptHelper.java
package helpers; import java.nio.CharBuffer; import java.nio.charset.Charset; import java.nio.charset.StandardCharsets; import static org.hamcrest.Matchers.is; import static org.junit.Assert.assertThat; import org.junit.Test; public class TestScryptHelper { private static final Charset utf8 = StandardCharsets.UTF_8; @Test public void testStandardVector1() throws Exception { /* Check against the test vectors described at: https://tools.ietf.org/html/rfc7914#section-12 / byte[] standardVector = new byte[]{(byte) 0x70, (byte) 0x23, (byte) 0xbd, (byte) 0xcb, (byte) 0x3a, (byte) 0xfd, (byte) 0x73, (byte) 0x48, (byte) 0x46, (byte) 0x1c, (byte) 0x06, (byte) 0xcd, (byte) 0x81, (byte) 0xfd, (byte) 0x38, (byte) 0xeb, (byte) 0xfd, (byte) 0xa8, (byte) 0xfb, (byte) 0xba, (byte) 0x90, (byte) 0x4f, (byte) 0x8e, (byte) 0x3e, (byte) 0xa9, (byte) 0xb5, (byte) 0x43, (byte) 0xf6, (byte) 0x54, (byte) 0x5d, (byte) 0xa1, (byte) 0xf2, (byte) 0xd5, (byte) 0x43, (byte) 0x29, (byte) 0x55, (byte) 0x61, (byte) 0x3f, (byte) 0x0f, (byte) 0xcf, (byte) 0x62, (byte) 0xd4, (byte) 0x97, (byte) 0x05, (byte) 0x24, (byte) 0x2a, (byte) 0x9a, (byte) 0xf9, (byte) 0xe6, (byte) 0x1e, (byte) 0x85, (byte) 0xdc, (byte) 0x0d, (byte) 0x65, (byte) 0x1e, (byte) 0x40, (byte) 0xdf, (byte) 0xcf, (byte) 0x01, (byte) 0x7b, (byte) 0x45, (byte) 0x57, (byte) 0x58, (byte) 0x87}; String password = "pleaseletmein"; byte[] salt = "SodiumChloride".getBytes(utf8); byte[] hash = ScryptHelper.hash(password, salt, 16384, 8, 1, 64); assertThat(hash, is(standardVector)); } @Test public void testStandardVector2() throws Exception { / Check against the test vectors described at: https://tools.ietf.org/html/rfc7914#section-12 / byte[] standardVector = new byte[]{(byte) 0xfd, (byte) 0xba, (byte) 0xbe, (byte) 0x1c, (byte) 0x9d, (byte) 0x34, (byte) 0x72, (byte) 0x00, (byte) 0x78, (byte) 0x56, (byte) 0xe7, (byte) 0x19, (byte) 0x0d, (byte) 0x01, (byte) 0xe9, (byte) 0xfe, (byte) 0x7c, (byte) 0x6a, (byte) 0xd7, (byte) 0xcb, (byte) 0xc8, (byte) 0x23, (byte) 0x78, (byte) 0x30, (byte) 0xe7, (byte) 0x73, (byte) 0x76, (byte) 0x63, (byte) 0x4b, (byte) 0x37, (byte) 0x31, (byte) 0x62, (byte) 0x2e, (byte) 0xaf, (byte) 0x30, (byte) 0xd9, (byte) 0x2e, (byte) 0x22, (byte) 0xa3, (byte) 0x88, (byte) 0x6f, (byte) 0xf1, (byte) 0x09, (byte) 0x27, (byte) 0x9d, (byte) 0x98, (byte) 0x30, (byte) 0xda, (byte) 0xc7, (byte) 0x27, (byte) 0xaf, (byte) 0xb9, (byte) 0x4a, (byte) 0x83, (byte) 0xee, (byte) 0x6d, (byte) 0x83, (byte) 0x60, (byte) 0xcb, (byte) 0xdf, (byte) 0xa2, (byte) 0xcc, (byte) 0x06, (byte) 0x40}; String password = "password"; byte[] salt = "NaCl".getBytes(utf8); byte[] hash = ScryptHelper.hash(password, salt, 1024, 8, 16, 64); assertThat(hash, is(standardVector)); } @Test public void testUTF8Password() throws Exception { String password = "\uD83D\uDCA9\uD83D\uDCA9\uD83D\uDCA9\uD83D\uDCA9\uD83D\uDCA9"; String hash = ScryptHelper.hash(password).toString(); boolean result = ScryptHelper.check(hash, password); assertThat(result, is(true)); } @Test public void testSimplePassword() throws Exception { String password = "testing123"; String hash = ScryptHelper.hash(password).toString(); boolean result = ScryptHelper.check(hash, password); assertThat(result, is(true)); } @Test public void testLongPassword() throws Exception { String password = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"; String hash = ScryptHelper.hash(password).toString(); boolean result = ScryptHelper.check(hash, password); assertThat(result, is(true)); } @Test public void testEmptyPassword() throws Exception { String password = ""; String hash = ScryptHelper.hash(password).toString(); boolean result = ScryptHelper.check(hash, password); assertThat(result, is(true)); } @Test public void testBadPassword() throws Exception { String password = "testing123"; String bad = "testing321"; String hash = ScryptHelper.hash(password).toString(); boolean result = ScryptHelper.check(hash, bad); assertThat(result, is(false)); } @Test public void testCharBufferPassword() throws Exception { CharBuffer password = CharBuffer.wrap("testing123"); String hash = ScryptHelper.hash(password).toString(); boolean result = ScryptHelper.check(hash, password); assertThat(result, is(true)); } @Test public void testHashTiming() throws Exception { final int REPS = 100; long startTime = System.currentTimeMillis(); for (int i = 0; i < REPS; i++) { ScryptHelper.hash("wibble" + i); } long endTime = System.currentTimeMillis(); System.out.println("Mean time per hash(): " + (endTime - startTime) / (float)REPS + " ms"); } @Test public void testCheckTiming() throws Exception { final int REPS = 100; CharBuffer hash = ScryptHelper.hash("wibble42"); long startTime = System.currentTimeMillis(); for (int i = 0; i < REPS; i++) { ScryptHelper.check(hash, "wibble" + i); } long endTime = System.currentTimeMillis(); System.out.println("Mean time per check(): " + (endTime - startTime) / (float)REPS + " ms"); } } package helpers; import java.nio.CharBuffer; import java.nio.charset.Charset; import java.nio.charset.StandardCharsets; import static org.hamcrest.Matchers.is; import static org.junit.Assert.assertThat; import org.junit.Test; public class TestScryptHelper { private static final Charset utf8 = StandardCharsets.UTF_8; @Test public void testStandardVector1() throws Exception { / Check against the test vectors described at: https://tools.ietf.org/html/rfc7914#section-12 / byte[] standardVector = new byte[]{(byte) 0x70, (byte) 0x23, (byte) 0xbd, (byte) 0xcb, (byte) 0x3a, (byte) 0xfd, (byte) 0x73, (byte) 0x48, (byte) 0x46, (byte) 0x1c, (byte) 0x06, (byte) 0xcd, (byte) 0x81, (byte) 0xfd, (byte) 0x38, (byte) 0xeb, (byte) 0xfd, (byte) 0xa8, (byte) 0xfb, (byte) 0xba, (byte) 0x90, (byte) 0x4f, (byte) 0x8e, (byte) 0x3e, (byte) 0xa9, (byte) 0xb5, (byte) 0x43, (byte) 0xf6, (byte) 0x54, (byte) 0x5d, (byte) 0xa1, (byte) 0xf2, (byte) 0xd5, (byte) 0x43, (byte) 0x29, (byte) 0x55, (byte) 0x61, (byte) 0x3f, (byte) 0x0f, (byte) 0xcf, (byte) 0x62, (byte) 0xd4, (byte) 0x97, (byte) 0x05, (byte) 0x24, (byte) 0x2a, (byte) 0x9a, (byte) 0xf9, (byte) 0xe6, (byte) 0x1e, (byte) 0x85, (byte) 0xdc, (byte) 0x0d, (byte) 0x65, (byte) 0x1e, (byte) 0x40, (byte) 0xdf, (byte) 0xcf, (byte) 0x01, (byte) 0x7b, (byte) 0x45, (byte) 0x57, (byte) 0x58, (byte) 0x87}; String password = "pleaseletmein"; byte[] salt = "SodiumChloride".getBytes(utf8); byte[] hash = ScryptHelper.hash(password, salt, 16384, 8, 1, 64); assertThat(hash, is(standardVector)); } @Test public void testStandardVector2() throws Exception { / Check against the test vectors described at: https://tools.ietf.org/html/rfc7914#section-12 */ byte[] standardVector = new byte[]{(byte) 0xfd, (byte) 0xba, (byte) 0xbe, (byte) 0x1c, (byte) 0x9d, (byte) 0x34, (byte) 0x72, (byte) 0x00, (byte) 0x78, (byte) 0x56, (byte) 0xe7, (byte) 0x19, (byte) 0x0d, (byte) 0x01, (byte) 0xe9, (byte) 0xfe, (byte) 0x7c, (byte) 0x6a, (byte) 0xd7, (byte) 0xcb, (byte) 0xc8, (byte) 0x23, (byte) 0x78, (byte) 0x30, (byte) 0xe7, (byte) 0x73, (byte) 0x76, (byte) 0x63, (byte) 0x4b, (byte) 0x37, (byte) 0x31, (byte) 0x62, (byte) 0x2e, (byte) 0xaf, (byte) 0x30, (byte) 0xd9, (byte) 0x2e, (byte) 0x22, (byte) 0xa3, (byte) 0x88, (byte) 0x6f, (byte) 0xf1, (byte) 0x09, (byte) 0x27, (byte) 0x9d, (byte) 0x98, (byte) 0x30, (byte) 0xda, (byte) 0xc7, (byte) 0x27, (byte) 0xaf, (byte) 0xb9, (byte) 0x4a, (byte) 0x83, (byte) 0xee, (byte) 0x6d, (byte) 0x83, (byte) 0x60, (byte) 0xcb, (byte) 0xdf, (byte) 0xa2, (byte) 0xcc, (byte) 0x06, (byte) 0x40}; String password = "password"; byte[] salt = "NaCl".getBytes(utf8); byte[] hash = ScryptHelper.hash(password, salt, 1024, 8, 16, 64); assertThat(hash, is(standardVector)); } @Test public void testUTF8Password() throws Exception { String password = "\uD83D\uDCA9\uD83D\uDCA9\uD83D\uDCA9\uD83D\uDCA9\uD83D\uDCA9"; String hash = ScryptHelper.hash(password).toString(); boolean result = ScryptHelper.check(hash, password); assertThat(result, is(true)); } @Test public void testSimplePassword() throws Exception { String password = "testing123"; String hash = ScryptHelper.hash(password).toString(); boolean result = ScryptHelper.check(hash, password); assertThat(result, is(true)); } @Test public void testLongPassword() throws Exception { String password = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"; String hash = ScryptHelper.hash(password).toString(); boolean result = ScryptHelper.check(hash, password); assertThat(result, is(true)); } @Test public void testEmptyPassword() throws Exception { String password = ""; String hash = ScryptHelper.hash(password).toString(); boolean result = ScryptHelper.check(hash, password); assertThat(result, is(true)); } @Test public void testBadPassword() throws Exception { String password = "testing123"; String bad = "testing321"; String hash = ScryptHelper.hash(password).toString(); boolean result = ScryptHelper.check(hash, bad); assertThat(result, is(false)); } @Test public void testCharBufferPassword() throws Exception { CharBuffer password = CharBuffer.wrap("testing123"); String hash = ScryptHelper.hash(password).toString(); boolean result = ScryptHelper.check(hash, password); assertThat(result, is(true)); } }

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src/test/java/helpers/TestScryptHelper.java

package helpers;

import java.nio.CharBuffer;
import java.nio.charset.Charset;
import java.nio.charset.StandardCharsets;
import static org.hamcrest.Matchers.is;
import static org.junit.Assert.assertThat;
import org.junit.Test;

public class TestScryptHelper {

private static final Charset utf8 = StandardCharsets.UTF_8;

@Test
	public void testStandardVector1() throws Exception {

/*
			Check against the test vectors described at:
				https://tools.ietf.org/html/rfc7914#section-12
		 */
		byte[] standardVector = new byte[]{(byte) 0x70, (byte) 0x23, (byte) 0xbd,
			(byte) 0xcb, (byte) 0x3a, (byte) 0xfd, (byte) 0x73, (byte) 0x48,
			(byte) 0x46, (byte) 0x1c, (byte) 0x06, (byte) 0xcd, (byte) 0x81,
			(byte) 0xfd, (byte) 0x38, (byte) 0xeb, (byte) 0xfd, (byte) 0xa8,
			(byte) 0xfb, (byte) 0xba, (byte) 0x90, (byte) 0x4f, (byte) 0x8e,
			(byte) 0x3e, (byte) 0xa9, (byte) 0xb5, (byte) 0x43, (byte) 0xf6,
			(byte) 0x54, (byte) 0x5d, (byte) 0xa1, (byte) 0xf2, (byte) 0xd5,
			(byte) 0x43, (byte) 0x29, (byte) 0x55, (byte) 0x61, (byte) 0x3f,
			(byte) 0x0f, (byte) 0xcf, (byte) 0x62, (byte) 0xd4, (byte) 0x97,
			(byte) 0x05, (byte) 0x24, (byte) 0x2a, (byte) 0x9a, (byte) 0xf9,
			(byte) 0xe6, (byte) 0x1e, (byte) 0x85, (byte) 0xdc, (byte) 0x0d,
			(byte) 0x65, (byte) 0x1e, (byte) 0x40, (byte) 0xdf, (byte) 0xcf,
			(byte) 0x01, (byte) 0x7b, (byte) 0x45, (byte) 0x57, (byte) 0x58,
			(byte) 0x87};

String password = "pleaseletmein";
		byte[] salt = "SodiumChloride".getBytes(utf8);

byte[] hash = ScryptHelper.hash(password, salt, 16384, 8, 1, 64);

assertThat(hash, is(standardVector));
	}

@Test
	public void testStandardVector2() throws Exception {

/*
			Check against the test vectors described at:
				https://tools.ietf.org/html/rfc7914#section-12
		 */
		byte[] standardVector = new byte[]{(byte) 0xfd, (byte) 0xba, (byte) 0xbe,
			(byte) 0x1c, (byte) 0x9d, (byte) 0x34, (byte) 0x72, (byte) 0x00,
			(byte) 0x78, (byte) 0x56, (byte) 0xe7, (byte) 0x19, (byte) 0x0d,
			(byte) 0x01, (byte) 0xe9, (byte) 0xfe, (byte) 0x7c, (byte) 0x6a,
			(byte) 0xd7, (byte) 0xcb, (byte) 0xc8, (byte) 0x23, (byte) 0x78,
			(byte) 0x30, (byte) 0xe7, (byte) 0x73, (byte) 0x76, (byte) 0x63,
			(byte) 0x4b, (byte) 0x37, (byte) 0x31, (byte) 0x62, (byte) 0x2e,
			(byte) 0xaf, (byte) 0x30, (byte) 0xd9, (byte) 0x2e, (byte) 0x22,
			(byte) 0xa3, (byte) 0x88, (byte) 0x6f, (byte) 0xf1, (byte) 0x09,
			(byte) 0x27, (byte) 0x9d, (byte) 0x98, (byte) 0x30, (byte) 0xda,
			(byte) 0xc7, (byte) 0x27, (byte) 0xaf, (byte) 0xb9, (byte) 0x4a,
			(byte) 0x83, (byte) 0xee, (byte) 0x6d, (byte) 0x83, (byte) 0x60,
			(byte) 0xcb, (byte) 0xdf, (byte) 0xa2, (byte) 0xcc, (byte) 0x06,
			(byte) 0x40};

String password = "password";
		byte[] salt = "NaCl".getBytes(utf8);

byte[] hash = ScryptHelper.hash(password, salt, 1024, 8, 16, 64);

assertThat(hash, is(standardVector));
	}

@Test
	public void testUTF8Password() throws Exception {
		String password = "\uD83D\uDCA9\uD83D\uDCA9\uD83D\uDCA9\uD83D\uDCA9\uD83D\uDCA9";
		String hash = ScryptHelper.hash(password).toString();
		boolean result = ScryptHelper.check(hash, password);
		assertThat(result, is(true));
	}

@Test
	public void testSimplePassword() throws Exception {
		String password = "testing123";
		String hash = ScryptHelper.hash(password).toString();
		boolean result = ScryptHelper.check(hash, password);
		assertThat(result, is(true));
	}

@Test
	public void testLongPassword() throws Exception {
		String password = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";
		String hash = ScryptHelper.hash(password).toString();
		boolean result = ScryptHelper.check(hash, password);
		assertThat(result, is(true));
	}

@Test
	public void testEmptyPassword() throws Exception {
		String password = "";
		String hash = ScryptHelper.hash(password).toString();
		boolean result = ScryptHelper.check(hash, password);
		assertThat(result, is(true));
	}

@Test
	public void testBadPassword() throws Exception {
		String password = "testing123";
		String bad = "testing321";
		String hash = ScryptHelper.hash(password).toString();
		boolean result = ScryptHelper.check(hash, bad);
		assertThat(result, is(false));
	}

@Test
	public void testCharBufferPassword() throws Exception {
		CharBuffer password = CharBuffer.wrap("testing123");
		String hash = ScryptHelper.hash(password).toString();
		boolean result = ScryptHelper.check(hash, password);
		assertThat(result, is(true));
	}

@Test
	public void testHashTiming() throws Exception {
		final int REPS = 100;
		long startTime = System.currentTimeMillis();
		for (int i = 0; i < REPS; i++) {
			ScryptHelper.hash("wibble" + i);
		}
		long endTime = System.currentTimeMillis();
		System.out.println("Mean time per hash(): " + (endTime - startTime) / (float)REPS + " ms");
	}

@Test
	public void testCheckTiming() throws Exception {
		final int REPS = 100;
		CharBuffer hash = ScryptHelper.hash("wibble42");
		long startTime = System.currentTimeMillis();
		for (int i = 0; i < REPS; i++) {
			ScryptHelper.check(hash, "wibble" + i);
		}
		long endTime = System.currentTimeMillis();
		System.out.println("Mean time per check(): " + (endTime - startTime) / (float)REPS + " ms");
	}

}

package helpers;

public class TestScryptHelper {

private static final Charset utf8 = StandardCharsets.UTF_8;

@Test
	public void testStandardVector1() throws Exception {

String password = "pleaseletmein";
		byte[] salt = "SodiumChloride".getBytes(utf8);

byte[] hash = ScryptHelper.hash(password, salt, 16384, 8, 1, 64);

assertThat(hash, is(standardVector));
	}

@Test
	public void testStandardVector2() throws Exception {

String password = "password";
		byte[] salt = "NaCl".getBytes(utf8);

byte[] hash = ScryptHelper.hash(password, salt, 1024, 8, 16, 64);

assertThat(hash, is(standardVector));
	}

}

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