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Add JUnit test to ensure proper bracketing and nested-ness of multiple OnePassSignatures
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/*
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* Copyright 2021 Paul Schaub.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.pgpainless.signature;
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import static org.junit.jupiter.api.Assertions.assertEquals;
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import static org.junit.jupiter.api.Assertions.assertNotNull;
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import java.io.ByteArrayInputStream;
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import java.io.ByteArrayOutputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.nio.charset.StandardCharsets;
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import java.security.InvalidAlgorithmParameterException;
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import java.security.NoSuchAlgorithmException;
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import org.bouncycastle.openpgp.PGPEncryptedData;
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import org.bouncycastle.openpgp.PGPEncryptedDataList;
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import org.bouncycastle.openpgp.PGPException;
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import org.bouncycastle.openpgp.PGPLiteralData;
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import org.bouncycastle.openpgp.PGPObjectFactory;
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import org.bouncycastle.openpgp.PGPOnePassSignature;
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import org.bouncycastle.openpgp.PGPOnePassSignatureList;
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import org.bouncycastle.openpgp.PGPPrivateKey;
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import org.bouncycastle.openpgp.PGPPublicKeyEncryptedData;
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import org.bouncycastle.openpgp.PGPPublicKeyRing;
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import org.bouncycastle.openpgp.PGPSecretKey;
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import org.bouncycastle.openpgp.PGPSecretKeyRing;
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import org.bouncycastle.openpgp.PGPSignature;
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import org.bouncycastle.openpgp.PGPSignatureList;
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import org.bouncycastle.openpgp.PGPUtil;
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import org.bouncycastle.openpgp.bc.BcPGPObjectFactory;
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import org.bouncycastle.openpgp.operator.PublicKeyDataDecryptorFactory;
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import org.bouncycastle.openpgp.operator.bc.BcPublicKeyDataDecryptorFactory;
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import org.bouncycastle.util.io.Streams;
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import org.junit.jupiter.params.ParameterizedTest;
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import org.junit.jupiter.params.provider.MethodSource;
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import org.pgpainless.PGPainless;
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import org.pgpainless.algorithm.DocumentSignatureType;
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import org.pgpainless.algorithm.HashAlgorithm;
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import org.pgpainless.algorithm.PublicKeyAlgorithm;
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import org.pgpainless.algorithm.SignatureType;
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import org.pgpainless.encryption_signing.EncryptionOptions;
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import org.pgpainless.encryption_signing.EncryptionStream;
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import org.pgpainless.encryption_signing.ProducerOptions;
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import org.pgpainless.encryption_signing.SigningOptions;
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import org.pgpainless.implementation.ImplementationFactory;
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import org.pgpainless.key.protection.SecretKeyRingProtector;
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import org.pgpainless.key.protection.UnlockSecretKey;
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public class OnePassSignatureBracketingTest {
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@ParameterizedTest
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@MethodSource("org.pgpainless.util.TestImplementationFactoryProvider#provideImplementationFactories")
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public void onePassSignaturePacketsAndSignaturesAreBracketedTest(ImplementationFactory implementationFactory) throws PGPException, InvalidAlgorithmParameterException, NoSuchAlgorithmException, IOException {
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ImplementationFactory.setFactoryImplementation(implementationFactory);
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PGPSecretKeyRing key1 = PGPainless.generateKeyRing().modernKeyRing("Alice", null);
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PGPSecretKeyRing key2 = PGPainless.generateKeyRing().modernKeyRing("Bob", null);
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PGPPublicKeyRing cert1 = PGPainless.extractCertificate(key1);
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ByteArrayOutputStream out = new ByteArrayOutputStream();
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EncryptionStream encryptionStream = PGPainless.encryptAndOrSign()
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.onOutputStream(out)
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.withOptions(ProducerOptions.signAndEncrypt(
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EncryptionOptions.encryptCommunications()
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.addRecipient(cert1),
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SigningOptions.get()
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.addInlineSignature(SecretKeyRingProtector.unprotectedKeys(), key1, DocumentSignatureType.BINARY_DOCUMENT)
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.addInlineSignature(SecretKeyRingProtector.unprotectedKeys(), key2, DocumentSignatureType.BINARY_DOCUMENT)
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).setAsciiArmor(true));
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ByteArrayInputStream data = new ByteArrayInputStream("Hello, World!".getBytes(StandardCharsets.UTF_8));
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Streams.pipeAll(data, encryptionStream);
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encryptionStream.close();
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ByteArrayInputStream ciphertextIn = new ByteArrayInputStream(out.toByteArray());
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InputStream inputStream = PGPUtil.getDecoderStream(ciphertextIn);
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PGPObjectFactory objectFactory = new BcPGPObjectFactory(inputStream);
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PGPOnePassSignatureList onePassSignatures = null;
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PGPSignatureList signatures = null;
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outerloop: while (true) {
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Object next = objectFactory.nextObject();
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if (next == null) {
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break outerloop;
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}
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if (next instanceof PGPEncryptedDataList) {
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PGPEncryptedDataList encryptedDataList = (PGPEncryptedDataList) next;
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for (PGPEncryptedData encryptedData : encryptedDataList) {
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if (encryptedData instanceof PGPPublicKeyEncryptedData) {
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PGPPublicKeyEncryptedData publicKeyEncryptedData = (PGPPublicKeyEncryptedData) encryptedData;
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PGPSecretKey secretKey = key1.getSecretKey(publicKeyEncryptedData.getKeyID());
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PGPPrivateKey privateKey = UnlockSecretKey.unlockSecretKey(secretKey, SecretKeyRingProtector.unprotectedKeys());
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PublicKeyDataDecryptorFactory decryptorFactory = new BcPublicKeyDataDecryptorFactory(privateKey);
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InputStream decryptionStream = publicKeyEncryptedData.getDataStream(decryptorFactory);
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objectFactory = new BcPGPObjectFactory(decryptionStream);
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continue outerloop;
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}
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}
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} else if (next instanceof PGPOnePassSignatureList) {
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onePassSignatures = (PGPOnePassSignatureList) next;
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continue outerloop;
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} else if (next instanceof PGPLiteralData) {
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continue outerloop;
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} else if (next instanceof PGPSignatureList) {
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signatures = (PGPSignatureList) next;
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continue outerloop;
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}
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}
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assertNotNull(onePassSignatures);
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assertNotNull(signatures);
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assertEquals(signatures.size(), onePassSignatures.size());
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assertEquals(2, signatures.size());
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for (int i = 0; i < signatures.size(); i++) {
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// CHECK BRACKETING
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// OnePassSignatures and Signatures are bracketed
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// eg. (OPS1, OPS2, LiteralData, Sig2, Sig1)
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PGPOnePassSignature onePassSignature = onePassSignatures.get(i);
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PGPSignature signature = signatures.get(signatures.size() - 1 - i);
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assertEquals(onePassSignature.getKeyID(), signature.getKeyID());
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byte[] encoded = onePassSignature.getEncoded();
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// CHECK NESTED-NESS
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// 0,1 are header
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// 2 is version number
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assertEquals(3, encoded[2]);
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// 3 is sig type
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assertEquals(SignatureType.BINARY_DOCUMENT.getCode(), encoded[3]);
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// 4 is hash algo
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assertEquals(HashAlgorithm.SHA512.getAlgorithmId(), encoded[4]);
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// 5 is public key algo
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assertEquals(PublicKeyAlgorithm.EDDSA.getAlgorithmId(), encoded[5]);
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// [6,7,8,9,10,11,12,13] are key-id
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boolean last = i == signatures.size() - 1;
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// 14 is nested
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assertEquals(last ? 1 : 0, encoded[14]);
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}
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}
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}
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