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Code Issues Releases Wiki Activity

Add support for generating keys without user-ids

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Fixes #296
This commit is contained in:
Paul Schaub 2022-08-29 14:12:02 +02:00
parent 76905cc1e8
commit c6676d3c91
Signed by: vanitasvitae
GPG key ID: 62BEE9264BF17311
3 changed files with 118 additions and 22 deletions
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42
pgpainless-core/src/main/java/org/pgpainless/key/generation/KeyRingBuilder.java
View file

@ -143,9 +143,6 @@ public class KeyRingBuilder implements KeyRingBuilderInterface<KeyRingBuilder> {
@Override
public PGPSecretKeyRing build() throws NoSuchAlgorithmException, PGPException,
InvalidAlgorithmParameterException {
if (userIds.isEmpty()) {
throw new IllegalStateException("At least one user-id is required.");
}
PGPDigestCalculator keyFingerprintCalculator = ImplementationFactory.getInstance().getV4FingerprintCalculator();
PBESecretKeyEncryptor secretKeyEncryptor = buildSecretKeyEncryptor(keyFingerprintCalculator);
PBESecretKeyDecryptor secretKeyDecryptor = buildSecretKeyDecryptor();
@ -157,19 +154,35 @@ public class KeyRingBuilder implements KeyRingBuilderInterface<KeyRingBuilder> {
PGPContentSignerBuilder signer = buildContentSigner(certKey);
PGPSignatureGenerator signatureGenerator = new PGPSignatureGenerator(signer);
// Prepare primary user-id sig
SignatureSubpackets hashedSubPacketGenerator = primaryKeySpec.getSubpacketGenerator();
hashedSubPacketGenerator.setIssuerFingerprintAndKeyId(certKey.getPublicKey());
hashedSubPacketGenerator.setPrimaryUserId();
if (expirationDate != null) {
hashedSubPacketGenerator.setKeyExpirationTime(certKey.getPublicKey(), expirationDate);
}
if (!userIds.isEmpty()) {
hashedSubPacketGenerator.setPrimaryUserId();
}
PGPSignatureSubpacketGenerator generator = new PGPSignatureSubpacketGenerator();
SignatureSubpacketsHelper.applyTo(hashedSubPacketGenerator, generator);
PGPSignatureSubpacketVector hashedSubPackets = generator.generate();
PGPKeyRingGenerator ringGenerator;
if (userIds.isEmpty()) {
ringGenerator = new PGPKeyRingGenerator(
certKey,
keyFingerprintCalculator,
hashedSubPackets,
null,
signer,
secretKeyEncryptor);
} else {
String primaryUserId = userIds.entrySet().iterator().next().getKey();
ringGenerator = new PGPKeyRingGenerator(
SignatureType.POSITIVE_CERTIFICATION.getCode(), certKey,
primaryUserId, keyFingerprintCalculator,
hashedSubPackets, null, signer, secretKeyEncryptor);
}
PGPKeyRingGenerator ringGenerator = buildRingGenerator(
certKey, signer, keyFingerprintCalculator, hashedSubPackets, secretKeyEncryptor);
addSubKeys(certKey, ringGenerator);
// Generate secret key ring with only primary user id
@ -182,7 +195,9 @@ public class KeyRingBuilder implements KeyRingBuilderInterface<KeyRingBuilder> {
PGPPrivateKey privateKey = UnlockSecretKey.unlockSecretKey(secretKeyRing.getSecretKey(), secretKeyDecryptor);
Iterator<Map.Entry<String, SelfSignatureSubpackets.Callback>> userIdIterator =
this.userIds.entrySet().iterator();
if (userIdIterator.hasNext()) {
userIdIterator.next(); // Skip primary user id
}
while (userIdIterator.hasNext()) {
Map.Entry<String, SelfSignatureSubpackets.Callback> additionalUserId = userIdIterator.next();
String userIdString = additionalUserId.getKey();
@ -217,19 +232,6 @@ public class KeyRingBuilder implements KeyRingBuilderInterface<KeyRingBuilder> {
return secretKeyRing;
}
private PGPKeyRingGenerator buildRingGenerator(PGPKeyPair certKey,
PGPContentSignerBuilder signer,
PGPDigestCalculator keyFingerprintCalculator,
PGPSignatureSubpacketVector hashedSubPackets,
PBESecretKeyEncryptor secretKeyEncryptor)
throws PGPException {
String primaryUserId = userIds.entrySet().iterator().next().getKey();
return new PGPKeyRingGenerator(
SignatureType.POSITIVE_CERTIFICATION.getCode(), certKey,
primaryUserId, keyFingerprintCalculator,
hashedSubPackets, null, signer, secretKeyEncryptor);
}
private void addSubKeys(PGPKeyPair primaryKey, PGPKeyRingGenerator ringGenerator)
throws NoSuchAlgorithmException, PGPException, InvalidAlgorithmParameterException {
for (KeySpec subKeySpec : subkeySpecs) {

3
pgpainless-core/src/main/java/org/pgpainless/signature/consumer/CertificateValidator.java
View file

@ -138,6 +138,7 @@ public final class CertificateValidator {
}
boolean anyUserIdValid = false;
boolean hasAnyUserIds = !userIdSignatures.keySet().isEmpty();
for (String userId : userIdSignatures.keySet()) {
if (!userIdSignatures.get(userId).isEmpty()) {
PGPSignature current = userIdSignatures.get(userId).get(0);
@ -149,7 +150,7 @@ public final class CertificateValidator {
}
}
if (!anyUserIdValid) {
if (hasAnyUserIds && !anyUserIdValid) {
throw new SignatureValidationException("No valid user-id found.", rejections);
}

93
pgpainless-core/src/test/java/org/pgpainless/key/generation/GenerateKeyWithoutUserIdTest.java Normal file
View file

@ -0,0 +1,93 @@
// SPDX-FileCopyrightText: 2022 Paul Schaub <vanitasvitae@fsfe.org>
//
// SPDX-License-Identifier: Apache-2.0
package org.pgpainless.key.generation;
import org.bouncycastle.openpgp.PGPException;
import org.bouncycastle.openpgp.PGPPublicKeyRing;
import org.bouncycastle.openpgp.PGPSecretKeyRing;
import org.bouncycastle.util.io.Streams;
import org.junit.JUtils;
import org.junit.jupiter.api.Test;
import org.pgpainless.PGPainless;
import org.pgpainless.algorithm.KeyFlag;
import org.pgpainless.decryption_verification.ConsumerOptions;
import org.pgpainless.decryption_verification.DecryptionStream;
import org.pgpainless.decryption_verification.OpenPgpMetadata;
import org.pgpainless.encryption_signing.EncryptionOptions;
import org.pgpainless.encryption_signing.EncryptionResult;
import org.pgpainless.encryption_signing.EncryptionStream;
import org.pgpainless.encryption_signing.ProducerOptions;
import org.pgpainless.encryption_signing.SigningOptions;
import org.pgpainless.key.generation.type.KeyType;
import org.pgpainless.key.generation.type.eddsa.EdDSACurve;
import org.pgpainless.key.generation.type.xdh.XDHSpec;
import org.pgpainless.key.info.KeyRingInfo;
import org.pgpainless.key.protection.SecretKeyRingProtector;
import org.pgpainless.util.DateUtil;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.security.InvalidAlgorithmParameterException;
import java.security.NoSuchAlgorithmException;
import java.util.Date;
import static org.junit.jupiter.api.Assertions.assertNull;
import static org.junit.jupiter.api.Assertions.assertTrue;
public class GenerateKeyWithoutUserIdTest {
@Test
public void generateKeyWithoutUserId() throws PGPException, InvalidAlgorithmParameterException, NoSuchAlgorithmException, IOException {
Date expirationDate = DateUtil.toSecondsPrecision(new Date(DateUtil.now().getTime() + 1000 * 6000));
PGPSecretKeyRing secretKey = PGPainless.buildKeyRing()
.setPrimaryKey(KeySpec.getBuilder(KeyType.EDDSA(EdDSACurve._Ed25519), KeyFlag.CERTIFY_OTHER))
.addSubkey(KeySpec.getBuilder(KeyType.EDDSA(EdDSACurve._Ed25519), KeyFlag.SIGN_DATA))
.addSubkey(KeySpec.getBuilder(KeyType.XDH(XDHSpec._X25519), KeyFlag.ENCRYPT_COMMS, KeyFlag.ENCRYPT_STORAGE))
.setExpirationDate(expirationDate)
.build();
KeyRingInfo info = PGPainless.inspectKeyRing(secretKey);
assertNull(info.getPrimaryUserId());
assertTrue(info.getUserIds().isEmpty());
JUtils.assertDateEquals(expirationDate, info.getPrimaryKeyExpirationDate());
InputStream plaintextIn = new ByteArrayInputStream("Hello, World!\n".getBytes());
ByteArrayOutputStream ciphertextOut = new ByteArrayOutputStream();
SecretKeyRingProtector protector = SecretKeyRingProtector.unprotectedKeys();
PGPPublicKeyRing certificate = PGPainless.extractCertificate(secretKey);
EncryptionStream encryptionStream = PGPainless.encryptAndOrSign()
.onOutputStream(ciphertextOut)
.withOptions(ProducerOptions.signAndEncrypt(
EncryptionOptions.get()
.addRecipient(certificate),
SigningOptions.get()
.addSignature(protector, secretKey)
));
Streams.pipeAll(plaintextIn, encryptionStream);
encryptionStream.close();
EncryptionResult result = encryptionStream.getResult();
assertTrue(result.isEncryptedFor(certificate));
ByteArrayInputStream ciphertextIn = new ByteArrayInputStream(ciphertextOut.toByteArray());
ByteArrayOutputStream plaintextOut = new ByteArrayOutputStream();
DecryptionStream decryptionStream = PGPainless.decryptAndOrVerify()
.onInputStream(ciphertextIn)
.withOptions(ConsumerOptions.get()
.addDecryptionKey(secretKey)
.addVerificationCert(certificate));
Streams.pipeAll(decryptionStream, plaintextOut);
decryptionStream.close();
OpenPgpMetadata metadata = decryptionStream.getResult();
assertTrue(metadata.containsVerifiedSignatureFrom(certificate));
assertTrue(metadata.isEncrypted());
}
}