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Leo Galambos
2025-09-16 23:14:24 +02:00
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samples/src/test/java/demo/CombinedDeliveryTest.java Normal file
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/*******************************************************************************
* Copyright (C) 2025, Leo Galambos
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* 3. All advertising materials mentioning features or use of this software must
* display the following acknowledgement:
* This product includes software developed by the Egothor project.
*
* 4. Neither the name of the copyright holder nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
******************************************************************************/
package demo;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.security.GeneralSecurityException;
import java.security.KeyPair;
import java.security.SecureRandom;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.TestInstance;
import zeroecho.core.CryptoAlgorithms;
import zeroecho.core.KeyUsage;
import zeroecho.core.alg.elgamal.ElgamalParamSpec;
import zeroecho.core.alg.kyber.KyberKeyGenSpec;
import zeroecho.core.alg.rsa.RsaKeyGenSpec;
import zeroecho.core.util.Strings;
import zeroecho.sdk.builders.alg.AesDataContentBuilder;
import zeroecho.sdk.builders.core.DataContentChainBuilder;
import zeroecho.sdk.builders.core.PlainBytesBuilder;
import zeroecho.sdk.content.api.DataContent;
import zeroecho.sdk.guard.MultiRecipientDataSourceBuilder;
import zeroecho.sdk.guard.UnlockMaterial;
import zeroecho.sdk.util.BouncyCastleActivator;
@TestInstance(TestInstance.Lifecycle.PER_CLASS)
class CombinedDeliveryTest {
private static final Logger LOG = Logger.getLogger(CombinedDeliveryTest.class.getName());
@BeforeAll
void setupProviders() {
BouncyCastleActivator.init();
}
KeyPair generateKyberKeys() throws GeneralSecurityException {
KeyPair kp = CryptoAlgorithms.generateKeyPair("ML-KEM", KyberKeyGenSpec.kyber1024());
LOG.log(Level.INFO, "ML-KEM key public={0} private={1}",
new Object[] { Strings.toShortHexString(kp.getPublic().getEncoded()),
Strings.toShortHexString(kp.getPrivate().getEncoded()) });
return kp;
}
KeyPair generateRsaKeys() throws GeneralSecurityException {
KeyPair kp = CryptoAlgorithms.generateKeyPair("RSA", RsaKeyGenSpec.rsa4096());
LOG.log(Level.INFO, "RSA key public={0} private={1}",
new Object[] { Strings.toShortHexString(kp.getPublic().getEncoded()),
Strings.toShortHexString(kp.getPrivate().getEncoded()) });
return kp;
}
KeyPair generateElGamalKeys() throws GeneralSecurityException {
KeyPair kp = CryptoAlgorithms.generateKeyPair("ElGamal", ElgamalParamSpec.ffdhe2048());
LOG.log(Level.INFO, "ElGamal key public={0} private={1}",
new Object[] { Strings.toShortHexString(kp.getPublic().getEncoded()),
Strings.toShortHexString(kp.getPrivate().getEncoded()) });
return kp;
}
@Test
void combinedSdkLevelAPI() throws GeneralSecurityException, IOException {
// Sample message to encrypt
byte[] msg = randomBytes(100);
KeyPair kem = generateKyberKeys();
KeyPair rsa = generateRsaKeys();
KeyPair elg = generateElGamalKeys();
char[] password = "p@ssw07d".toCharArray();
KeyPair decoy1rsa = generateRsaKeys();
KeyPair decoy2rsa = generateRsaKeys();
AesDataContentBuilder payload = AesDataContentBuilder.builder().modeCbcPkcs5().withHeader();
MultiRecipientDataSourceBuilder multi = MultiRecipientDataSourceBuilder.builder()
// AES-256 - 32 bytes of key material
.payloadKeyBytes(32).withAes(payload)
// add recipients - the context initialized with the public key
.addRecipient(CryptoAlgorithms.create("ElGamal", KeyUsage.ENCRYPT, elg.getPublic()))
.addRecipient(CryptoAlgorithms.create("RSA", KeyUsage.ENCRYPT, rsa.getPublic()))
// ML-KEM PostQuantum uses AES for the inner payload
.addRecipient(CryptoAlgorithms.create("ML-KEM", KeyUsage.ENCAPSULATE, kem.getPublic()),
/* AES256 key size */
32,
/* salt size in hkdf */
32)
// Password (via KDF)
.addPasswordRecipient(password, /* iterations */ 200_000, /* saltLen */ 16, /* kekBytes */ 32)
// and some decoys
.addRecipient(CryptoAlgorithms.create("RSA", KeyUsage.ENCRYPT, decoy1rsa.getPublic()))
.addRecipient(CryptoAlgorithms.create("RSA", KeyUsage.ENCRYPT, decoy2rsa.getPublic()));
// shuffle all the recipients
multi.shuffle();
DataContent dccb = DataContentChainBuilder.encrypt().add(PlainBytesBuilder.builder().bytes(msg))
// encrypt for multi recipients of various types
.add(multi).build();
byte[] encrypted;
try (InputStream encryptedStream = dccb.getStream()) {
// Consume the encrypted data into memory
encrypted = readAll(encryptedStream);
}
recipientProcessing("ElGamal-ffdhe2048", msg, encrypted, new UnlockMaterial.Private(elg.getPrivate()));
recipientProcessing("RSA4096", msg, encrypted, new UnlockMaterial.Private(rsa.getPrivate()));
recipientProcessing("Kyber-1024", msg, encrypted, new UnlockMaterial.Private(kem.getPrivate()));
recipientProcessing("Password", msg, encrypted, new UnlockMaterial.Password(password));
}
private void recipientProcessing(String method, byte[] msg, byte[] encrypted, UnlockMaterial unlock)
throws IOException {
AesDataContentBuilder payload = AesDataContentBuilder.builder().modeCbcPkcs5().withHeader();
MultiRecipientDataSourceBuilder multi = MultiRecipientDataSourceBuilder.builder()
// define our payload
.payloadKeyBytes(32).withAes(payload)
// one recipient
.unlockWith(unlock);
// Decryption
DataContent dccb = DataContentChainBuilder.decrypt().add(PlainBytesBuilder.builder().bytes(encrypted))
// decrypt via multi
.add(multi).build();
byte[] decrypted;
try (InputStream decryptedStream = dccb.getStream()) {
// Consume the decrypted data into memory
decrypted = readAll(decryptedStream);
}
LOG.log(Level.INFO, "original message={0} after {2}/AES256/CBC/PKCS5 roundtrip={1}",
new Object[] { Strings.toShortHexString(msg), Strings.toShortHexString(decrypted), method });
}
// helpers
private static byte[] randomBytes(int len) {
byte[] data = new byte[len];
new SecureRandom().nextBytes(data);
return data;
}
private static byte[] readAll(InputStream in) throws IOException {
try (ByteArrayOutputStream out = new ByteArrayOutputStream()) {
in.transferTo(out);
out.flush();
return out.toByteArray();
}
}
}