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Marko Zivanovic
2015-03-10 15:47:41 +01:00
parent f803e8d569
commit ce9e40f1c5
8 changed files with 619 additions and 0 deletions
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pom.xml
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<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>rs.in.zivanovic</groupId>
<artifactId>j-password-obfuscator</artifactId>
<version>1.0.0-SNAPSHOT</version>
<packaging>jar</packaging>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.7</maven.compiler.source>
<maven.compiler.target>1.7</maven.compiler.target>
</properties>
<name>JPasswordObfuscator</name>
<description>
Extensible Java library and command line utility for sensitive data obfuscation and de-obfuscation.
Solution for protecting passwords and other sensitive data in configuration files or in transit from casual glances.
Not at all useful for protecting sensitive data from attackers bent on stealing your secrets.
</description>
<licenses>
<license>
<name>MIT license</name>
<url>http://opensource.org/licenses/MIT</url>
<distribution>repo</distribution>
</license>
</licenses>
<developers>
<developer>
<id>marko</id>
<name>Marko Zivanovic</name>
<email>marko@zivanovic.in.rs</email>
<url>http://marko.zivanovic.in.rs</url>
<roles>
<role>developer</role>
</roles>
<timezone>+1</timezone>
</developer>
</developers>
<organization>
<name>Marko Zivanovic</name>
<url>http://marko.zivanovic.in.rs</url>
</organization>
<dependencies>
<dependency>
<groupId>org.bouncycastle</groupId>
<artifactId>bcprov-jdk15on</artifactId>
<version>1.52</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.10</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>2.4</version>
<configuration>
<archive>
<manifest>
<mainClass>rs.in.zivanovic.obfuscator.Run</mainClass>
</manifest>
</archive>
</configuration>
</plugin>
</plugins>
</build>
</project>
src/main/java/rs/in/zivanovic/obfuscator/JPasswordObfuscator.java
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/*
* The MIT License
*
* Copyright 2015 Marko Zivanovic <marko@zivanovic.in.rs>.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package rs.in.zivanovic.obfuscator;
import java.util.Objects;
import rs.in.zivanovic.obfuscator.impl.ObfuscatedData;
import rs.in.zivanovic.obfuscator.impl.Obfuscator;
import rs.in.zivanovic.obfuscator.impl.V1ObfuscatorImpl;
/**
* Obfuscate and de-obfuscate sensitive data.
*
* This method is useful for protecting potentially sensitive data from casual onlookers. It is NOT secure against
* attackers with access to source code or live systems.
*
* @author Marko Zivanovic <marko@zivanovic.in.rs>
*/
public final class JPasswordObfuscator {
private final Obfuscator v1Obfuscator = new V1ObfuscatorImpl();
/**
* Obfuscate data using supplied master key and current algorithm version.
*
* @param masterKey master key to use for obfuscation
* @param data data to obfuscate
*
* @return string containing obfuscated data; use {@link #deObfuscate} to get secret data from this string
*/
public String obfuscate(char[] masterKey, byte[] data) {
return obfuscate(masterKey, data, 1);
}
/**
* Obfuscate data using supplied master key and algorithm version.
*
* @param masterKey master key to use for obfuscation
* @param data data to obfuscate
* @param version obfuscation algorithm version to use
*
* @return string containing obfuscated data; use {@link #deObfuscate} to get secret data from this string
*/
public String obfuscate(char[] masterKey, byte[] data, int version) {
Objects.requireNonNull(masterKey);
Objects.requireNonNull(data);
switch (version) {
case 1:
return v1Obfuscator.obfuscate(masterKey, data).toString();
default:
throw new IllegalArgumentException("Unsupported version: " + version);
}
}
/**
* De-obfuscate string generated with {@link #obfuscate} method.
*
* @param masterKey master key to use for de-obfuscation; must match the key used for obfuscation
* @param obfuscatedString obfuscated string generated using one of {@link #obfuscate} methods
*
* @return original, de-obfuscated data
*/
public byte[] deObfuscate(char[] masterKey, String obfuscatedString) {
Objects.requireNonNull(masterKey);
Objects.requireNonNull(obfuscatedString);
ObfuscatedData ob = ObfuscatedData.fromString(obfuscatedString);
switch (ob.version) {
case 1:
return v1Obfuscator.deObfuscate(masterKey, ob);
default:
throw new IllegalArgumentException("Unsupported version: " + ob.version);
}
}
}
src/main/java/rs/in/zivanovic/obfuscator/Run.java
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/*
* The MIT License
*
* Copyright 2015 Marko Zivanovic <marko@zivanovic.in.rs>.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package rs.in.zivanovic.obfuscator;
import java.nio.charset.StandardCharsets;
/**
* Command line interface for obfuscating and de-obfuscating data.
*
* @author Marko Zivanovic <marko@zivanovic.in.rs>
*/
public class Run {
public static void main(String[] args) {
if (args.length != 3) {
showHelp();
} else {
switch (args[0]) {
case "o":
obfuscate(args);
break;
case "d":
deObfuscate(args);
break;
default:
showHelp();
}
}
}
private static void showHelp() {
System.out.println(String.format("Data obfuscation / de-obfuscation tool"));
System.out.
println(String.format("Syntax: java -jar <file.jar> <operation> <master key> <data to de/obfuscate>"));
System.out.println(String.format(" <operation> - 'o' - obfuscate, 'd' - de-obfuscate"));
}
private static void deObfuscate(String[] args) {
char[] masterKey = args[1].toCharArray();
String data = args[2];
System.out.println(new String(new JPasswordObfuscator().deObfuscate(masterKey, data), StandardCharsets.UTF_8));
}
private static void obfuscate(String[] args) {
char[] masterKey = args[1].toCharArray();
byte[] data = args[2].getBytes(StandardCharsets.UTF_8);
System.out.println(new JPasswordObfuscator().obfuscate(masterKey, data));
}
}
src/main/java/rs/in/zivanovic/obfuscator/impl/ObfuscatedData.java
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/*
* The MIT License
*
* Copyright 2015 Marko Zivanovic <marko@zivanovic.in.rs>.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package rs.in.zivanovic.obfuscator.impl;
import org.bouncycastle.util.encoders.Base64;
/**
* Container for obfuscated data.
*
* @author Marko Zivanovic <marko@zivanovic.in.rs>
*/
public class ObfuscatedData {
private static final String SIGNATURE = "rizobf";
public final int version;
public final byte[] salt;
public final byte[] cipherText;
public ObfuscatedData(int version, byte[] salt, byte[] cipherText) {
this.version = version;
this.salt = salt;
this.cipherText = cipherText;
}
@Override
public String toString() {
return String.format("$%s$%d$%s$%s", SIGNATURE, version, Base64.toBase64String(salt),
Base64.toBase64String(cipherText));
}
public static ObfuscatedData fromString(String obfuscatedString) {
String[] parts = obfuscatedString.split("\\$");
if (parts.length != 5) {
throw new IllegalArgumentException("Invalid obfuscated data");
}
if (!parts[1].equals(SIGNATURE)) {
throw new IllegalArgumentException("Invalid obfuscated data");
}
return new ObfuscatedData(Integer.parseInt(parts[2]), Base64.decode(parts[3]), Base64.decode(parts[4]));
}
}
src/main/java/rs/in/zivanovic/obfuscator/impl/Obfuscator.java
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/*
* The MIT License
*
* Copyright 2015 Marko Zivanovic <marko@zivanovic.in.rs>.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package rs.in.zivanovic.obfuscator.impl;
/**
* Obfuscator/de-obfuscator interface.
*
* @author Marko Zivanovic <marko@zivanovic.in.rs>
*/
public interface Obfuscator {
/**
* Obfuscate sensitive data using supplied master key.
*
* @param masterKey master key to use for data obfuscation
* @param data sensitive data to obfuscate
*
* @return obfuscated string
*/
ObfuscatedData obfuscate(char[] masterKey, byte[] data);
/**
* De-obfuscate data using supplied master key.
*
* @param masterKey master key to use for data de-obfuscation; must match master key used for obfuscation
* @param data string obfuscated with {@link #obfuscate} to de-obfuscate
*
* @return
*/
byte[] deObfuscate(char[] masterKey, ObfuscatedData data);
}
src/main/java/rs/in/zivanovic/obfuscator/impl/PBEObfuscatorImpl.java
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/*
* The MIT License
*
* Copyright 2015 Marko Zivanovic <marko@zivanovic.in.rs>.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package rs.in.zivanovic.obfuscator.impl;
import java.security.*;
import java.security.spec.InvalidKeySpecException;
import java.util.Random;
import javax.crypto.*;
import javax.crypto.spec.PBEKeySpec;
/**
* Password Based Encryption (PBE) based obfuscator. Use as a base class for further specializations.
*
* @author Marko Zivanovic <marko@zivanovic.in.rs>
*/
public class PBEObfuscatorImpl implements Obfuscator {
private final int version;
private final String algo;
private final String provider;
private final int iterations;
private final int saltLen;
public PBEObfuscatorImpl(int version, String algo, String provider, int iterations, int saltLen) {
this.algo = algo;
this.provider = provider;
this.iterations = iterations;
this.saltLen = saltLen;
this.version = version;
}
@Override
public ObfuscatedData obfuscate(char[] masterKey, byte[] data) {
try {
byte[] salt = generateRandomSalt();
byte[] cipher = crypto(Cipher.ENCRYPT_MODE, data, masterKey, salt);
return new ObfuscatedData(version, salt, cipher);
} catch (GeneralSecurityException ex) {
throw new RuntimeException(ex);
}
}
@Override
public byte[] deObfuscate(char[] masterKey, ObfuscatedData ob) {
try {
return crypto(Cipher.DECRYPT_MODE, ob.cipherText, masterKey, ob.salt);
} catch (GeneralSecurityException ex) {
throw new RuntimeException(ex);
}
}
private byte[] crypto(int mode, byte[] input, char[] masterKey, byte[] salt) throws IllegalBlockSizeException,
InvalidKeyException, NoSuchAlgorithmException, BadPaddingException, NoSuchProviderException,
NoSuchPaddingException, InvalidKeySpecException {
SecretKeyFactory skf = SecretKeyFactory.getInstance(algo, provider);
PBEKeySpec ks = new PBEKeySpec(masterKey, salt, iterations);
SecretKey sk = skf.generateSecret(ks);
Cipher c = Cipher.getInstance(algo, provider);
c.init(mode, sk);
return c.doFinal(input);
}
private byte[] generateRandomSalt() throws NoSuchAlgorithmException, NoSuchProviderException {
Random random = SecureRandom.getInstance("SHA1PRNG");
byte[] salt = new byte[saltLen];
random.nextBytes(salt);
return salt;
}
}
src/main/java/rs/in/zivanovic/obfuscator/impl/V1ObfuscatorImpl.java
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/*
* The MIT License
*
* Copyright 2015 Marko Zivanovic <marko@zivanovic.in.rs>.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package rs.in.zivanovic.obfuscator.impl;
import java.security.Security;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
/**
* PBE-based obfuscator using <em>PBEWithSHA256And128BitAES</em> algorithm with 16,000 rounds, 8 bytes of randomly
* generated salt and BouncyCastle as crypto provider.
*
* @author Marko Zivanovic <marko@zivanovic.in.rs>
*/
public class V1ObfuscatorImpl extends PBEObfuscatorImpl {
static {
Security.addProvider(new BouncyCastleProvider());
}
private static final int VERSION = 1;
private static final String PROVIDER = "BC";
private static final String ALGO = "PBEWithSHA256And128BitAES-CBC-BC";
private static final int SALT_LEN = 8;
private static final int ITERATION_COUNT = 16_000;
public V1ObfuscatorImpl() {
super(VERSION, ALGO, PROVIDER, ITERATION_COUNT, SALT_LEN);
}
}
src/test/java/rs/in/zivanovic/obfuscator/JPasswordObfuscatorTest.java
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/*
* The MIT License
*
* Copyright 2015 Marko Zivanovic <marko@zivanovic.in.rs>.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package rs.in.zivanovic.obfuscator;
import java.nio.charset.StandardCharsets;
import static org.hamcrest.CoreMatchers.*;
import static org.junit.Assert.*;
import org.junit.Test;
/**
* Obfuscator unit tests.
*
* @author Marko Zivanovic <marko@zivanovic.in.rs>
*/
public class JPasswordObfuscatorTest {
private static final char[] masterKey = "masterKey".toCharArray();
private static final char[] masterKey1 = "masterKey1".toCharArray();
private static final char[] masterKey2 = "masterKey2".toCharArray();
private static final byte[] data = "data".getBytes(StandardCharsets.UTF_8);
private final JPasswordObfuscator engine = new JPasswordObfuscator();
@Test
public void testObfuscateDeObfuscate() {
String ob = engine.obfuscate(masterKey, data);
System.out.println(ob);
byte[] deob = engine.deObfuscate(masterKey, ob);
assertArrayEquals(data, deob);
}
@Test(expected = IllegalArgumentException.class)
public void testObfuscateInvalidVersion() {
String ob = engine.obfuscate(masterKey, data, 123);
}
@Test(expected = RuntimeException.class)
public void testObfuscateDeObfuscateWrongMasterKey() {
String ob = engine.obfuscate(masterKey1, data);
byte[] deob = engine.deObfuscate(masterKey2, ob);
assertThat(data, not(equalTo(deob)));
}
@Test
public void testObfuscateTiming() {
int timing_length = 3;
long start = System.currentTimeMillis();
long count = 0;
while (System.currentTimeMillis() - start < timing_length * 1_000) {
count++;
engine.obfuscate(masterKey, data);
}
System.out.println(String.format("%d iterations in %d seconds, %.2f iterations per second", count,
timing_length, (float) count / timing_length));
}
@Test(expected = NullPointerException.class)
public void testObfuscateNullData() {
engine.obfuscate(masterKey, null);
}
@Test(expected = NullPointerException.class)
public void testObfuscateNullMasterKey() {
engine.obfuscate(null, data);
}
@Test(expected = NullPointerException.class)
public void testDeobfuscateNullData() {
engine.deObfuscate(masterKey, null);
}
@Test(expected = RuntimeException.class)
public void testDeobfuscateGarbageData() {
engine.deObfuscate(masterKey, "23499999puchn-p23948hfrn-[8f2333331xd");
}
@Test(expected = IllegalArgumentException.class)
public void testDeobfuscateInvalidSignature() {
engine.deObfuscate(masterKey, "$INV$1$v1hACmQULBk=$ggRxqVe1fUMvUnzpLA6CoQ==");
}
@Test(expected = IllegalArgumentException.class)
public void testDeobfuscateTruncated() {
engine.deObfuscate(masterKey, "$rizobf$1$v1hACmQULBk=$");
}
@Test(expected = RuntimeException.class)
public void testDeobfuscateInvalidData() {
engine.deObfuscate(masterKey, "$rizobf$1$v1hACmQULBk=$ggRxqVe1fUMvUnzpLA6Coq");
}
@Test(expected = IllegalArgumentException.class)
public void testDeobfuscateInvalidVersion() {
engine.deObfuscate(masterKey, "$rizobf$211$v1hACmQULBk=$ggRxqVe1fUMvUnzpLA6Coq");
}
}