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cert-d-java
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Rewrite of PGPCertificateDirectory using more flexible backend

This commit is contained in:
Paul Schaub 2022-08-09 17:50:15 +02:00
parent 60779b921e
commit 7c39781d15
Signed by: vanitasvitae
GPG Key ID: 62BEE9264BF17311
22 changed files with 889 additions and 1063 deletions
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16
pgp-cert-d-java/src/main/java/pgp/cert_d/BackendProvider.java
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// SPDX-FileCopyrightText: 2022 Paul Schaub <vanitasvitae@fsfe.org>
//
// SPDX-License-Identifier: Apache-2.0
package pgp.cert_d;
import pgp.certificate_store.CertificateMerger;
import pgp.certificate_store.KeyReaderBackend;
public abstract class BackendProvider {
public abstract KeyReaderBackend provideKeyReaderBackend();
public abstract CertificateMerger provideDefaultMergeCallback();
}

249
pgp-cert-d-java/src/main/java/pgp/cert_d/CachingSharedPGPCertificateDirectoryWrapper.java
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// SPDX-FileCopyrightText: 2022 Paul Schaub <vanitasvitae@fsfe.org>
//
// SPDX-License-Identifier: Apache-2.0
package pgp.cert_d;
import pgp.certificate_store.Key;
import pgp.certificate_store.KeyMerger;
import pgp.certificate_store.exception.BadDataException;
import pgp.certificate_store.exception.BadNameException;
import pgp.certificate_store.Certificate;
import pgp.certificate_store.CertificateMerger;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
/**
* Caching wrapper for {@link SharedPGPCertificateDirectory} implementations.
*/
public class CachingSharedPGPCertificateDirectoryWrapper
implements SharedPGPCertificateDirectory {
private static final Map<String, String> certTagMap = new HashMap<>();
private static final Map<String, String> keyTagMap = new HashMap<>();
private static final Map<String, Certificate> certificateMap = new HashMap<>();
private static final Map<String, Key> keyMap = new HashMap<>();
private final SharedPGPCertificateDirectory underlyingCertificateDirectory;
public CachingSharedPGPCertificateDirectoryWrapper(SharedPGPCertificateDirectory wrapped) {
this.underlyingCertificateDirectory = wrapped;
}
/**
* Store the given certificate under the given identifier into the cache.
*
* @param identifier fingerprint or special name
* @param certificate certificate
*/
private void remember(String identifier, Certificate certificate) {
certificateMap.put(identifier, certificate);
try {
certTagMap.put(identifier, certificate.getTag());
} catch (IOException e) {
certTagMap.put(identifier, null);
}
}
/**
* Store the given key under the given identifier into the cache.
*
* @param identifier fingerprint or special name
* @param key key
*/
private void remember(String identifier, Key key) {
keyMap.put(identifier, key);
try {
keyTagMap.put(identifier, key.getTag());
} catch (IOException e) {
keyTagMap.put(identifier, null);
}
}
/**
* Returns true, if the cached tag differs from the provided tag.
*
* @param identifier fingerprint or special name
* @param tag tag
* @return true if cached tag differs, false otherwise
*/
private boolean certTagChanged(String identifier, String tag) {
String tack = certTagMap.get(identifier);
return !tagEquals(tag, tack);
}
private boolean keyTagChanged(String identifier, String tag) {
String tack = keyTagMap.get(identifier);
return !tagEquals(tag, tack);
}
/**
* Return true, if tag and tack are equal, false otherwise.
* @param tag tag
* @param tack other tag
* @return true if equal
*/
private static boolean tagEquals(String tag, String tack) {
return (tag == null && tack == null)
|| tag != null && tag.equals(tack);
}
/**
* Clear the cache.
*/
public void invalidate() {
certificateMap.clear();
certTagMap.clear();
}
@Override
public LockingMechanism getLock() {
return underlyingCertificateDirectory.getLock();
}
@Override
public Certificate getByFingerprint(String fingerprint)
throws IOException, BadNameException, BadDataException {
Certificate certificate = certificateMap.get(fingerprint);
if (certificate == null) {
certificate = underlyingCertificateDirectory.getByFingerprint(fingerprint);
if (certificate != null) {
remember(fingerprint, certificate);
}
}
return certificate;
}
@Override
public Certificate getBySpecialName(String specialName)
throws IOException, BadNameException, BadDataException {
Certificate certificate = certificateMap.get(specialName);
if (certificate == null) {
certificate = underlyingCertificateDirectory.getBySpecialName(specialName);
if (certificate != null) {
remember(specialName, certificate);
}
}
return certificate;
}
@Override
public Certificate getByFingerprintIfChanged(String fingerprint, String tag)
throws IOException, BadNameException, BadDataException {
if (certTagChanged(fingerprint, tag)) {
return getByFingerprint(fingerprint);
}
return null;
}
@Override
public Certificate getBySpecialNameIfChanged(String specialName, String tag)
throws IOException, BadNameException, BadDataException {
if (certTagChanged(specialName, tag)) {
return getBySpecialName(specialName);
}
return null;
}
@Override
public Key getTrustRoot() throws IOException, BadDataException {
Key key = keyMap.get(SpecialNames.TRUST_ROOT);
if (key == null) {
key = underlyingCertificateDirectory.getTrustRoot();
if (key != null) {
remember(SpecialNames.TRUST_ROOT, key);
}
}
return key;
}
@Override
public Key getTrustRootIfChanged(String tag) throws IOException, BadDataException {
if (keyTagChanged(SpecialNames.TRUST_ROOT, tag)) {
return getTrustRoot();
}
return null;
}
@Override
public Certificate insert(InputStream data, CertificateMerger merge)
throws IOException, BadDataException, InterruptedException {
Certificate certificate = underlyingCertificateDirectory.insert(data, merge);
remember(certificate.getFingerprint(), certificate);
return certificate;
}
@Override
public Certificate tryInsert(InputStream data, CertificateMerger merge)
throws IOException, BadDataException {
Certificate certificate = underlyingCertificateDirectory.tryInsert(data, merge);
if (certificate != null) {
remember(certificate.getFingerprint(), certificate);
}
return certificate;
}
@Override
public Key insertTrustRoot(InputStream data, KeyMerger merge) throws IOException, BadDataException, InterruptedException {
Key key = underlyingCertificateDirectory.insertTrustRoot(data, merge);
remember(SpecialNames.TRUST_ROOT, key);
return key;
}
@Override
public Key tryInsertTrustRoot(InputStream data, KeyMerger merge) throws IOException, BadDataException {
Key key = underlyingCertificateDirectory.tryInsertTrustRoot(data, merge);
if (key != null) {
remember(SpecialNames.TRUST_ROOT, key);
}
return key;
}
@Override
public Certificate insertWithSpecialName(String specialName, InputStream data, CertificateMerger merge)
throws IOException, BadDataException, BadNameException, InterruptedException {
Certificate certificate = underlyingCertificateDirectory.insertWithSpecialName(specialName, data, merge);
remember(specialName, certificate);
return certificate;
}
@Override
public Certificate tryInsertWithSpecialName(String specialName, InputStream data, CertificateMerger merge)
throws IOException, BadDataException, BadNameException {
Certificate certificate = underlyingCertificateDirectory.tryInsertWithSpecialName(specialName, data, merge);
if (certificate != null) {
remember(specialName, certificate);
}
return certificate;
}
@Override
public Iterator<Certificate> items() {
Iterator<Certificate> iterator = underlyingCertificateDirectory.items();
return new Iterator<Certificate>() {
@Override
public boolean hasNext() {
return iterator.hasNext();
}
@Override
public Certificate next() {
Certificate certificate = iterator.next();
remember(certificate.getFingerprint(), certificate);
return certificate;
}
};
}
@Override
public Iterator<String> fingerprints() {
return underlyingCertificateDirectory.fingerprints();
}
}

405
pgp-cert-d-java/src/main/java/pgp/cert_d/FileBasedCertificateDirectoryBackend.java Normal file
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// SPDX-FileCopyrightText: 2022 Paul Schaub <vanitasvitae@fsfe.org>
//
// SPDX-License-Identifier: Apache-2.0
package pgp.cert_d;
import pgp.certificate_store.Certificate;
import pgp.certificate_store.KeyMaterial;
import pgp.certificate_store.KeyMaterialMerger;
import pgp.certificate_store.KeyMaterialReaderBackend;
import pgp.certificate_store.exception.BadDataException;
import pgp.certificate_store.exception.BadNameException;
import pgp.certificate_store.exception.NotAStoreException;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileFilter;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.RandomAccessFile;
import java.nio.channels.FileLock;
import java.nio.channels.OverlappingFileLockException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.regex.Pattern;
public class FileBasedCertificateDirectoryBackend implements PGPCertificateDirectory.Backend {
private abstract static class Lazy<E> {
abstract E get() throws BadDataException;
}
private static class FileLockingMechanism implements PGPCertificateDirectory.LockingMechanism {
private final File lockFile;
private RandomAccessFile randomAccessFile;
private FileLock fileLock;
FileLockingMechanism(File lockFile) {
this.lockFile = lockFile;
}
public static FileLockingMechanism defaultDirectoryFileLock(File baseDirectory) {
return new FileLockingMechanism(new File(baseDirectory, "writelock"));
}
@Override
public synchronized void lockDirectory() throws IOException, InterruptedException {
if (randomAccessFile != null) {
// we own the lock already. Let's wait...
this.wait();
}
try {
randomAccessFile = new RandomAccessFile(lockFile, "rw");
} catch (FileNotFoundException e) {
lockFile.createNewFile();
randomAccessFile = new RandomAccessFile(lockFile, "rw");
}
fileLock = randomAccessFile.getChannel().lock();
}
@Override
public synchronized boolean tryLockDirectory() throws IOException {
if (randomAccessFile != null) {
// We already locked the directory for another write operation.
// We fail, since we have not yet released the lock from the other operation.
return false;
}
try {
randomAccessFile = new RandomAccessFile(lockFile, "rw");
} catch (FileNotFoundException e) {
lockFile.createNewFile();
randomAccessFile = new RandomAccessFile(lockFile, "rw");
}
try {
fileLock = randomAccessFile.getChannel().tryLock();
if (fileLock == null) {
// try-lock failed, file is locked by another process.
randomAccessFile.close();
randomAccessFile = null;
return false;
}
} catch (OverlappingFileLockException e) {
// Some other object is holding the lock.
randomAccessFile.close();
randomAccessFile = null;
return false;
}
return true;
}
@Override
public boolean isLocked() {
return randomAccessFile != null;
}
@Override
public synchronized void releaseDirectory() throws IOException {
// unlock file
if (fileLock != null) {
fileLock.release();
fileLock = null;
}
// close file
if (randomAccessFile != null) {
randomAccessFile.close();
randomAccessFile = null;
}
// delete file
if (lockFile.exists()) {
lockFile.delete();
}
// notify waiters
this.notify();
}
}
private final File baseDirectory;
private final PGPCertificateDirectory.LockingMechanism lock;
private final FilenameResolver resolver;
private final KeyMaterialReaderBackend reader;
public FileBasedCertificateDirectoryBackend(File baseDirectory, KeyMaterialReaderBackend reader) throws NotAStoreException {
this.baseDirectory = baseDirectory;
this.resolver = new FilenameResolver(baseDirectory);
if (!baseDirectory.exists()) {
if (!baseDirectory.mkdirs()) {
throw new NotAStoreException("Cannot create base directory '" + resolver.getBaseDirectory().getAbsolutePath() + "'");
}
} else {
if (baseDirectory.isFile()) {
throw new NotAStoreException("Base directory '" + resolver.getBaseDirectory().getAbsolutePath() + "' appears to be a file.");
}
}
this.lock = FileLockingMechanism.defaultDirectoryFileLock(baseDirectory);
this.reader = reader;
}
@Override
public PGPCertificateDirectory.LockingMechanism getLock() {
return lock;
}
@Override
public Certificate readByFingerprint(String fingerprint) throws BadNameException, IOException, BadDataException {
File certFile = resolver.getCertFileByFingerprint(fingerprint);
if (!certFile.exists()) {
return null;
}
FileInputStream fileIn = new FileInputStream(certFile);
BufferedInputStream bufferedIn = new BufferedInputStream(fileIn);
Certificate certificate = reader.read(bufferedIn).asCertificate();
if (!certificate.getFingerprint().equals(fingerprint)) {
// TODO: Figure out more suitable exception
throw new BadDataException();
}
return certificate;
}
@Override
public KeyMaterial readBySpecialName(String specialName) throws BadNameException, IOException, BadDataException {
File certFile = resolver.getCertFileBySpecialName(specialName);
if (!certFile.exists()) {
return null;
}
FileInputStream fileIn = new FileInputStream(certFile);
BufferedInputStream bufferedIn = new BufferedInputStream(fileIn);
KeyMaterial keyMaterial = reader.read(bufferedIn);
return keyMaterial;
}
@Override
public Iterator<Certificate> readItems() {
return new Iterator<Certificate>() {
private final List<Lazy<Certificate>> certificateQueue = Collections.synchronizedList(new ArrayList<>());
// Constructor... wtf.
{
File[] subdirectories = baseDirectory.listFiles(new FileFilter() {
@Override
public boolean accept(File file) {
return file.isDirectory() && file.getName().matches("^[a-f0-9]{2}$");
}
});
for (File subdirectory : subdirectories) {
File[] files = subdirectory.listFiles(new FileFilter() {
@Override
public boolean accept(File file) {
return file.isFile() && file.getName().matches("^[a-f0-9]{38}$");
}
});
for (File certFile : files) {
certificateQueue.add(new Lazy<Certificate>() {
@Override
Certificate get() throws BadDataException {
try {
Certificate certificate = reader.read(new FileInputStream(certFile)).asCertificate();
if (!(subdirectory.getName() + certFile.getName()).equals(certificate.getFingerprint())) {
throw new BadDataException();
}
return certificate;
} catch (IOException e) {
throw new AssertionError("File got deleted.");
}
}
});
}
}
}
@Override
public boolean hasNext() {
return !certificateQueue.isEmpty();
}
@Override
public Certificate next() {
try {
return certificateQueue.remove(0).get();
} catch (BadDataException e) {
throw new AssertionError("Could not retrieve item: " + e.getMessage());
}
}
};
}
@Override
public KeyMaterial doInsertTrustRoot(InputStream data, KeyMaterialMerger merge) throws BadDataException, IOException {
KeyMaterial newCertificate = reader.read(data);
KeyMaterial existingCertificate;
File certFile;
try {
existingCertificate = readBySpecialName(SpecialNames.TRUST_ROOT);
certFile = resolver.getCertFileBySpecialName(SpecialNames.TRUST_ROOT);
} catch (BadNameException e) {
throw new BadDataException();
}
if (existingCertificate != null && !newCertificate.getTag().equals(existingCertificate.getTag())) {
newCertificate = merge.merge(newCertificate, existingCertificate);
}
writeToFile(newCertificate.getInputStream(), certFile);
return newCertificate;
}
@Override
public Certificate doInsert(InputStream data, KeyMaterialMerger merge) throws IOException, BadDataException {
KeyMaterial newCertificate = reader.read(data);
Certificate existingCertificate;
File certFile;
try {
existingCertificate = readByFingerprint(newCertificate.getFingerprint());
certFile = resolver.getCertFileByFingerprint(newCertificate.getFingerprint());
} catch (BadNameException e) {
throw new BadDataException();
}
if (existingCertificate != null && !newCertificate.getTag().equals(existingCertificate.getTag())) {
newCertificate = merge.merge(newCertificate, existingCertificate);
}
writeToFile(newCertificate.getInputStream(), certFile);
return newCertificate.asCertificate();
}
@Override
public Certificate doInsertWithSpecialName(String specialName, InputStream data, KeyMaterialMerger merge) throws IOException, BadDataException, BadNameException {
KeyMaterial newCertificate = reader.read(data);
KeyMaterial existingCertificate;
File certFile;
try {
existingCertificate = readBySpecialName(specialName);
certFile = resolver.getCertFileBySpecialName(specialName);
} catch (BadNameException e) {
throw new BadDataException();
}
if (existingCertificate != null && !newCertificate.getTag().equals(existingCertificate.getTag())) {
newCertificate = merge.merge(newCertificate, existingCertificate);
}
writeToFile(newCertificate.getInputStream(), certFile);
return newCertificate.asCertificate();
}
private void writeToFile(InputStream inputStream, File certFile)
throws IOException {
certFile.getParentFile().mkdirs();
if (!certFile.exists() && !certFile.createNewFile()) {
throw new IOException("Could not create cert file " + certFile.getAbsolutePath());
}
FileOutputStream fileOut = new FileOutputStream(certFile);
byte[] buffer = new byte[4096];
int read;
while ((read = inputStream.read(buffer)) != -1) {
fileOut.write(buffer, 0, read);
}
inputStream.close();
fileOut.close();
}
public static class FilenameResolver {
private final File baseDirectory;
private final Pattern openPgpV4FingerprintPattern = Pattern.compile("^[a-f0-9]{40}$");
public FilenameResolver(File baseDirectory) {
this.baseDirectory = baseDirectory;
}
public File getBaseDirectory() {
return baseDirectory;
}
/**
* Calculate the file location for the certificate addressed by the given
* lowercase hexadecimal OpenPGP fingerprint.
*
* @param fingerprint fingerprint
* @return absolute certificate file location
*
* @throws BadNameException if the given fingerprint string is not a fingerprint
*/
public File getCertFileByFingerprint(String fingerprint) throws BadNameException {
if (!isFingerprint(fingerprint)) {
throw new BadNameException();
}
// is fingerprint
File subdirectory = new File(getBaseDirectory(), fingerprint.substring(0, 2));
File file = new File(subdirectory, fingerprint.substring(2));
return file;
}
/**
* Calculate the file location for the certification addressed using the given special name.
* For known special names, see {@link SpecialNames}.
*
* @param specialName special name (e.g. "trust-root")
* @return absolute certificate file location
*
* @throws BadNameException in case the given special name is not known
*/
public File getCertFileBySpecialName(String specialName)
throws BadNameException {
if (!isSpecialName(specialName)) {
throw new BadNameException(String.format("%s is not a known special name", specialName));
}
return new File(getBaseDirectory(), specialName);
}
/**
* Calculate the file location for the key addressed using the given special name.
* For known special names, see {@link SpecialNames}.
*
* @param specialName special name (e.g. "trust-root")
* @return absolute key file location
*
* @throws BadNameException in case the given special name is not known
*/
public File getKeyFileBySpecialName(String specialName)
throws BadNameException {
if (!isSpecialName(specialName)) {
throw new BadNameException(String.format("%s is not a known special name", specialName));
}
return new File(getBaseDirectory(), specialName + ".key");
}
private boolean isFingerprint(String fingerprint) {
return openPgpV4FingerprintPattern.matcher(fingerprint).matches();
}
private boolean isSpecialName(String specialName) {
return SpecialNames.lookupSpecialName(specialName) != null;
}
}
}

96
pgp-cert-d-java/src/main/java/pgp/cert_d/FileLockingMechanism.java
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// SPDX-FileCopyrightText: 2022 Paul Schaub <vanitasvitae@fsfe.org>
//
// SPDX-License-Identifier: Apache-2.0
package pgp.cert_d;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.nio.channels.FileLock;
import java.nio.channels.OverlappingFileLockException;
public class FileLockingMechanism implements LockingMechanism {
private final File lockFile;
private RandomAccessFile randomAccessFile;
private FileLock fileLock;
public FileLockingMechanism(File lockFile) {
this.lockFile = lockFile;
}
public static FileLockingMechanism defaultDirectoryFileLock(File baseDirectory) {
return new FileLockingMechanism(new File(baseDirectory, "writelock"));
}
@Override
public synchronized void lockDirectory() throws IOException, InterruptedException {
if (randomAccessFile != null) {
// we own the lock already. Let's wait...
this.wait();
}
try {
randomAccessFile = new RandomAccessFile(lockFile, "rw");
} catch (FileNotFoundException e) {
lockFile.createNewFile();
randomAccessFile = new RandomAccessFile(lockFile, "rw");
}
fileLock = randomAccessFile.getChannel().lock();
}
@Override
public synchronized boolean tryLockDirectory() throws IOException {
if (randomAccessFile != null) {
// We already locked the directory for another write operation.
// We fail, since we have not yet released the lock from the other operation.
return false;
}
try {
randomAccessFile = new RandomAccessFile(lockFile, "rw");
} catch (FileNotFoundException e) {
lockFile.createNewFile();
randomAccessFile = new RandomAccessFile(lockFile, "rw");
}
try {
fileLock = randomAccessFile.getChannel().tryLock();
if (fileLock == null) {
// try-lock failed, file is locked by another process.
randomAccessFile.close();
randomAccessFile = null;
return false;
}
} catch (OverlappingFileLockException e) {
// Some other object is holding the lock.
randomAccessFile.close();
randomAccessFile = null;
return false;
}
return true;
}
@Override
public synchronized void releaseDirectory() throws IOException {
// unlock file
if (fileLock != null) {
fileLock.release();
fileLock = null;
}
// close file
if (randomAccessFile != null) {
randomAccessFile.close();
randomAccessFile = null;
}
// delete file
if (lockFile.exists()) {
lockFile.delete();
}
// notify waiters
this.notify();
}
}

89
pgp-cert-d-java/src/main/java/pgp/cert_d/FilenameResolver.java
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// SPDX-FileCopyrightText: 2022 Paul Schaub <vanitasvitae@fsfe.org>
//
// SPDX-License-Identifier: Apache-2.0
package pgp.cert_d;
import pgp.certificate_store.exception.BadNameException;
import java.io.File;
import java.util.regex.Pattern;
public class FilenameResolver {
private final File baseDirectory;
private final Pattern openPgpV4FingerprintPattern = Pattern.compile("^[a-f0-9]{40}$");
public FilenameResolver(File baseDirectory) {
this.baseDirectory = baseDirectory;
}
public File getBaseDirectory() {
return baseDirectory;
}
/**
* Calculate the file location for the certificate addressed by the given
* lowercase hexadecimal OpenPGP fingerprint.
*
* @param fingerprint fingerprint
* @return absolute certificate file location
*
* @throws BadNameException if the given fingerprint string is not a fingerprint
*/
public File getCertFileByFingerprint(String fingerprint) throws BadNameException {
if (!isFingerprint(fingerprint)) {
throw new BadNameException();
}
// is fingerprint
File subdirectory = new File(getBaseDirectory(), fingerprint.substring(0, 2));
File file = new File(subdirectory, fingerprint.substring(2));
return file;
}
/**
* Calculate the file location for the certification addressed using the given special name.
* For known special names, see {@link SpecialNames}.
*
* @param specialName special name (e.g. "trust-root")
* @return absolute certificate file location
*
* @throws BadNameException in case the given special name is not known
*/
public File getCertFileBySpecialName(String specialName)
throws BadNameException {
if (!isSpecialName(specialName)) {
throw new BadNameException(String.format("%s is not a known special name", specialName));
}
return new File(getBaseDirectory(), specialName);
}
/**
* Calculate the file location for the key addressed using the given special name.
* For known special names, see {@link SpecialNames}.
*
* @param specialName special name (e.g. "trust-root")
* @return absolute key file location
*
* @throws BadNameException in case the given special name is not known
*/
public File getKeyFileBySpecialName(String specialName)
throws BadNameException {
if (!isSpecialName(specialName)) {
throw new BadNameException(String.format("%s is not a known special name", specialName));
}
return new File(getBaseDirectory(), specialName + ".key");
}
private boolean isFingerprint(String fingerprint) {
return openPgpV4FingerprintPattern.matcher(fingerprint).matches();
}
private boolean isSpecialName(String specialName) {
return SpecialNames.lookupSpecialName(specialName) != null;
}
}

116
pgp-cert-d-java/src/main/java/pgp/cert_d/InMemoryCertificateDirectoryBackend.java Normal file
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// SPDX-FileCopyrightText: 2022 Paul Schaub <vanitasvitae@fsfe.org>
//
// SPDX-License-Identifier: Apache-2.0
package pgp.cert_d;
import pgp.certificate_store.Certificate;
import pgp.certificate_store.KeyMaterial;
import pgp.certificate_store.KeyMaterialMerger;
import pgp.certificate_store.KeyMaterialReaderBackend;
import pgp.certificate_store.exception.BadDataException;
import pgp.certificate_store.exception.BadNameException;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
public class InMemoryCertificateDirectoryBackend implements PGPCertificateDirectory.Backend {
protected static class ObjectLockingMechanism implements PGPCertificateDirectory.LockingMechanism {
private boolean locked = false;
@Override
public synchronized void lockDirectory() throws InterruptedException {
if (isLocked()) {
wait();
}
locked = true;
}
@Override
public synchronized boolean tryLockDirectory() {
if (isLocked()) {
return false;
}
locked = true;
return true;
}
@Override
public synchronized boolean isLocked() {
return locked;
}
@Override
public synchronized void releaseDirectory() {
locked = false;
notify();
}
}
private final Map<String, Certificate> certificateFingerprintMap = new HashMap<>();
private final Map<String, KeyMaterial> keyMaterialSpecialNameMap = new HashMap<>();
private final PGPCertificateDirectory.LockingMechanism lock = new ObjectLockingMechanism();
private final KeyMaterialReaderBackend reader;
public InMemoryCertificateDirectoryBackend(KeyMaterialReaderBackend reader) {
this.reader = reader;
}
@Override
public PGPCertificateDirectory.LockingMechanism getLock() {
return lock;
}
@Override
public Certificate readByFingerprint(String fingerprint) {
return certificateFingerprintMap.get(fingerprint);
}
@Override
public KeyMaterial readBySpecialName(String specialName) {
return keyMaterialSpecialNameMap.get(specialName);
}
@Override
public Iterator<Certificate> readItems() {
return certificateFingerprintMap.values().iterator();
}
@Override
public KeyMaterial doInsertTrustRoot(InputStream data, KeyMaterialMerger merge)
throws BadDataException, IOException {
KeyMaterial update = reader.read(data);
KeyMaterial existing = readBySpecialName(SpecialNames.TRUST_ROOT);
KeyMaterial merged = merge.merge(update, existing);
keyMaterialSpecialNameMap.put(SpecialNames.TRUST_ROOT, merged);
return merged;
}
@Override
public Certificate doInsert(InputStream data, KeyMaterialMerger merge)
throws IOException, BadDataException {
KeyMaterial update = reader.read(data);
Certificate existing = readByFingerprint(update.getFingerprint());
Certificate merged = merge.merge(update, existing).asCertificate();
certificateFingerprintMap.put(update.getFingerprint(), merged);
return merged;
}
@Override
public Certificate doInsertWithSpecialName(String specialName, InputStream data, KeyMaterialMerger merge)
throws IOException, BadDataException, BadNameException {
KeyMaterial keyMaterial = reader.read(data);
KeyMaterial existing = readBySpecialName(specialName);
KeyMaterial merged = merge.merge(keyMaterial, existing);
keyMaterialSpecialNameMap.put(specialName, merged);
return merged.asCertificate();
}
}

37
pgp-cert-d-java/src/main/java/pgp/cert_d/LockingMechanism.java
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@ -1,37 +0,0 @@
// SPDX-FileCopyrightText: 2022 Paul Schaub <vanitasvitae@fsfe.org>
//
// SPDX-License-Identifier: Apache-2.0
package pgp.cert_d;
import java.io.IOException;
public interface LockingMechanism {
/**
* Lock the store for writes.
* Readers can continue to use the store and will always see consistent certs.
*
* @throws IOException in case of an IO error
* @throws InterruptedException if the thread gets interrupted
*/
void lockDirectory() throws IOException, InterruptedException;
/**
* Try top lock the store for writes.
* Return false without locking the store in case the store was already locked.
*
* @return true if locking succeeded, false otherwise
*
* @throws IOException in case of an IO error
*/
boolean tryLockDirectory() throws IOException;
/**
* Release the directory write-lock acquired via {@link #lockDirectory()}.
*
* @throws IOException in case of an IO error
*/
void releaseDirectory() throws IOException;
}

33
pgp-cert-d-java/src/main/java/pgp/cert_d/PGPCertificateDirectories.java Normal file
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@ -0,0 +1,33 @@
// SPDX-FileCopyrightText: 2022 Paul Schaub <vanitasvitae@fsfe.org>
//
// SPDX-License-Identifier: Apache-2.0
package pgp.cert_d;
import pgp.certificate_store.KeyMaterialReaderBackend;
import pgp.certificate_store.exception.NotAStoreException;
import java.io.File;
public final class PGPCertificateDirectories {
private PGPCertificateDirectories() {
}
public static PGPCertificateDirectory inMemoryCertificateDirectory(KeyMaterialReaderBackend keyReader) {
return new PGPCertificateDirectory(new InMemoryCertificateDirectoryBackend(keyReader));
}
public static PGPCertificateDirectory defaultFileBasedCertificateDirectory(KeyMaterialReaderBackend keyReader)
throws NotAStoreException {
return fileBasedCertificateDirectory(keyReader, BaseDirectoryProvider.getDefaultBaseDir());
}
public static PGPCertificateDirectory fileBasedCertificateDirectory(
KeyMaterialReaderBackend keyReader, File baseDirectory)
throws NotAStoreException {
return new PGPCertificateDirectory(
new FileBasedCertificateDirectoryBackend(baseDirectory, keyReader));
}
}

194
pgp-cert-d-java/src/main/java/pgp/cert_d/PGPCertificateDirectory.java Normal file
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@ -0,0 +1,194 @@
// SPDX-FileCopyrightText: 2022 Paul Schaub <vanitasvitae@fsfe.org>
//
// SPDX-License-Identifier: Apache-2.0
package pgp.cert_d;
import pgp.certificate_store.Certificate;
import pgp.certificate_store.KeyMaterial;
import pgp.certificate_store.KeyMaterialMerger;
import pgp.certificate_store.exception.BadDataException;
import pgp.certificate_store.exception.BadNameException;
import java.io.IOException;
import java.io.InputStream;
import java.util.Iterator;
public class PGPCertificateDirectory
implements ReadOnlyPGPCertificateDirectory, WritingPGPCertificateDirectory {
private final Backend backend;
public PGPCertificateDirectory(Backend backend) {
this.backend = backend;
}
@Override
public Certificate getByFingerprint(String fingerprint) throws BadDataException, BadNameException, IOException {
return backend.readByFingerprint(fingerprint);
}
@Override
public Certificate getBySpecialName(String specialName)
throws BadNameException, BadDataException, IOException {
KeyMaterial keyMaterial = backend.readBySpecialName(specialName);
if (keyMaterial != null) {
return keyMaterial.asCertificate();
}
return null;
}
@Override
public Certificate getTrustRootCertificate()
throws IOException, BadDataException {
try {
return getBySpecialName(SpecialNames.TRUST_ROOT);
} catch (BadNameException e) {
throw new AssertionError("'" + SpecialNames.TRUST_ROOT + "' is an implementation MUST");
}
}
@Override
public Iterator<Certificate> items() {
return backend.readItems();
}
@Override
public Iterator<String> fingerprints() {
Iterator<Certificate> certs = items();
return new Iterator<String>() {
@Override
public boolean hasNext() {
return certs.hasNext();
}
@Override
public String next() {
return certs.next().getFingerprint();
}
};
}
@Override
public KeyMaterial getTrustRoot() throws IOException, BadDataException {
try {
return backend.readBySpecialName(SpecialNames.TRUST_ROOT);
} catch (BadNameException e) {
throw new AssertionError("'" + SpecialNames.TRUST_ROOT + "' is implementation MUST");
}
}
@Override
public KeyMaterial insertTrustRoot(InputStream data, KeyMaterialMerger merge)
throws IOException, BadDataException, InterruptedException {
backend.getLock().lockDirectory();
KeyMaterial inserted = backend.doInsertTrustRoot(data, merge);
backend.getLock().releaseDirectory();
return inserted;
}
@Override
public KeyMaterial tryInsertTrustRoot(InputStream data, KeyMaterialMerger merge)
throws IOException, BadDataException {
if (!backend.getLock().tryLockDirectory()) {
return null;
}
KeyMaterial inserted = backend.doInsertTrustRoot(data, merge);
backend.getLock().releaseDirectory();
return inserted;
}
@Override
public Certificate insert(InputStream data, KeyMaterialMerger merge)
throws IOException, BadDataException, InterruptedException {
backend.getLock().lockDirectory();
Certificate inserted = backend.doInsert(data, merge);
backend.getLock().releaseDirectory();
return inserted;
}
@Override
public Certificate tryInsert(InputStream data, KeyMaterialMerger merge)
throws IOException, BadDataException {
if (!backend.getLock().tryLockDirectory()) {
return null;
}
Certificate inserted = backend.doInsert(data, merge);
backend.getLock().releaseDirectory();
return inserted;
}
@Override
public Certificate insertWithSpecialName(String specialName, InputStream data, KeyMaterialMerger merge)
throws IOException, BadDataException, BadNameException, InterruptedException {
backend.getLock().lockDirectory();
Certificate inserted = backend.doInsertWithSpecialName(specialName, data, merge);
backend.getLock().releaseDirectory();
return inserted;
}
@Override
public Certificate tryInsertWithSpecialName(String specialName, InputStream data, KeyMaterialMerger merge)
throws IOException, BadDataException, BadNameException {
if (!backend.getLock().tryLockDirectory()) {
return null;
}
Certificate inserted = backend.doInsertWithSpecialName(specialName, data, merge);
backend.getLock().releaseDirectory();
return inserted;
}
public interface Backend {
LockingMechanism getLock();
Certificate readByFingerprint(String fingerprint) throws BadNameException, IOException, BadDataException;
KeyMaterial readBySpecialName(String specialName) throws BadNameException, IOException, BadDataException;
Iterator<Certificate> readItems();
KeyMaterial doInsertTrustRoot(InputStream data, KeyMaterialMerger merge)
throws BadDataException, IOException;
Certificate doInsert(InputStream data, KeyMaterialMerger merge)
throws IOException, BadDataException;
Certificate doInsertWithSpecialName(String specialName, InputStream data, KeyMaterialMerger merge)
throws IOException, BadDataException, BadNameException;
}
public interface LockingMechanism {
/**
* Lock the store for writes.
* Readers can continue to use the store and will always see consistent certs.
*
* @throws IOException in case of an IO error
* @throws InterruptedException if the thread gets interrupted
*/
void lockDirectory() throws IOException, InterruptedException;
/**
* Try top lock the store for writes.
* Return false without locking the store in case the store was already locked.
*
* @return true if locking succeeded, false otherwise
*
* @throws IOException in case of an IO error
*/
boolean tryLockDirectory() throws IOException;
boolean isLocked();
/**
* Release the directory write-lock acquired via {@link #lockDirectory()}.
*
* @throws IOException in case of an IO error
*/
void releaseDirectory() throws IOException;
}
}

28
pgp-cert-d-java/src/main/java/pgp/cert_d/ReadOnlyPGPCertificateDirectory.java Normal file
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@ -0,0 +1,28 @@
// SPDX-FileCopyrightText: 2022 Paul Schaub <vanitasvitae@fsfe.org>
//
// SPDX-License-Identifier: Apache-2.0
package pgp.cert_d;
import pgp.certificate_store.Certificate;
import pgp.certificate_store.exception.BadDataException;
import pgp.certificate_store.exception.BadNameException;
import java.io.IOException;
import java.util.Iterator;
public interface ReadOnlyPGPCertificateDirectory {
Certificate getTrustRootCertificate()
throws IOException, BadDataException;
Certificate getByFingerprint(String fingerprint)
throws IOException, BadNameException, BadDataException;
Certificate getBySpecialName(String specialName)
throws IOException, BadNameException, BadDataException;
Iterator<Certificate> items();
Iterator<String> fingerprints();
}

61
pgp-cert-d-java/src/main/java/pgp/cert_d/SharedPGPCertificateDirectory.java
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@ -1,61 +0,0 @@
// SPDX-FileCopyrightText: 2022 Paul Schaub <vanitasvitae@fsfe.org>
//
// SPDX-License-Identifier: Apache-2.0
package pgp.cert_d;
import java.io.IOException;
import java.io.InputStream;
import java.util.Iterator;
import pgp.certificate_store.Key;
import pgp.certificate_store.KeyMerger;
import pgp.certificate_store.exception.BadDataException;
import pgp.certificate_store.exception.BadNameException;
import pgp.certificate_store.Certificate;
import pgp.certificate_store.CertificateMerger;
public interface SharedPGPCertificateDirectory {
LockingMechanism getLock();
Certificate getByFingerprint(String fingerprint)
throws IOException, BadNameException, BadDataException;
Certificate getBySpecialName(String specialName)
throws IOException, BadNameException, BadDataException;
Key getTrustRoot()
throws IOException, BadDataException;
Key getTrustRootIfChanged(String tag)
throws IOException, BadDataException;
Key insertTrustRoot(InputStream data, KeyMerger merge)
throws IOException, BadDataException, InterruptedException;
Key tryInsertTrustRoot(InputStream data, KeyMerger merge)
throws IOException, BadDataException;
Certificate getByFingerprintIfChanged(String fingerprint, String tag)
throws IOException, BadNameException, BadDataException;
Certificate getBySpecialNameIfChanged(String specialName, String tag)
throws IOException, BadNameException, BadDataException;
Certificate insert(InputStream data, CertificateMerger merge)
throws IOException, BadDataException, InterruptedException;
Certificate tryInsert(InputStream data, CertificateMerger merge)
throws IOException, BadDataException;
Certificate insertWithSpecialName(String specialName, InputStream data, CertificateMerger merge)
throws IOException, BadDataException, BadNameException, InterruptedException;
Certificate tryInsertWithSpecialName(String specialName, InputStream data, CertificateMerger merge)
throws IOException, BadDataException, BadNameException;
Iterator<Certificate> items();
Iterator<String> fingerprints();
}

405
pgp-cert-d-java/src/main/java/pgp/cert_d/SharedPGPCertificateDirectoryImpl.java
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@ -1,405 +0,0 @@
// SPDX-FileCopyrightText: 2022 Paul Schaub <vanitasvitae@fsfe.org>
//
// SPDX-License-Identifier: Apache-2.0
package pgp.cert_d;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileFilter;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import pgp.certificate_store.Key;
import pgp.certificate_store.KeyMaterial;
import pgp.certificate_store.KeyMerger;
import pgp.certificate_store.KeyReaderBackend;
import pgp.certificate_store.exception.BadDataException;
import pgp.certificate_store.exception.BadNameException;
import pgp.certificate_store.exception.NotAStoreException;
import pgp.certificate_store.Certificate;
import pgp.certificate_store.CertificateMerger;
public class SharedPGPCertificateDirectoryImpl implements SharedPGPCertificateDirectory {
private final FilenameResolver resolver;
private final LockingMechanism writeLock;
private final KeyReaderBackend keyReaderBackend;
public SharedPGPCertificateDirectoryImpl(BackendProvider backendProvider)
throws NotAStoreException {
this(backendProvider.provideKeyReaderBackend());
}
public SharedPGPCertificateDirectoryImpl(KeyReaderBackend keyReaderBackend)
throws NotAStoreException {
this(
BaseDirectoryProvider.getDefaultBaseDir(),
keyReaderBackend);
}
public SharedPGPCertificateDirectoryImpl(File baseDirectory,
KeyReaderBackend keyReaderBackend)
throws NotAStoreException {
this(
keyReaderBackend,
new FilenameResolver(baseDirectory),
FileLockingMechanism.defaultDirectoryFileLock(baseDirectory));
}
public SharedPGPCertificateDirectoryImpl(
KeyReaderBackend keyReaderBackend,
FilenameResolver filenameResolver,
LockingMechanism writeLock)
throws NotAStoreException {
this.keyReaderBackend = keyReaderBackend;
this.resolver = filenameResolver;
this.writeLock = writeLock;
File baseDirectory = resolver.getBaseDirectory();
if (!baseDirectory.exists()) {
if (!baseDirectory.mkdirs()) {
throw new NotAStoreException("Cannot create base directory '" + resolver.getBaseDirectory().getAbsolutePath() + "'");
}
} else {
if (baseDirectory.isFile()) {
throw new NotAStoreException("Base directory '" + resolver.getBaseDirectory().getAbsolutePath() + "' appears to be a file.");
}
}
}
@Override
public LockingMechanism getLock() {
return writeLock;
}
@Override
public Certificate getByFingerprint(String fingerprint)
throws IOException, BadNameException, BadDataException {
File certFile = resolver.getCertFileByFingerprint(fingerprint);
if (!certFile.exists()) {
return null;
}
FileInputStream fileIn = new FileInputStream(certFile);
BufferedInputStream bufferedIn = new BufferedInputStream(fileIn);
Certificate certificate = readCertificate(bufferedIn);
if (!certificate.getFingerprint().equals(fingerprint)) {
// TODO: Figure out more suitable exception
throw new BadDataException();
}
return certificate;
}
private Certificate readCertificate(InputStream inputStream) throws BadDataException, IOException {
KeyMaterial record = keyReaderBackend.read(inputStream);
Certificate certificate = null;
if (record instanceof Certificate) {
certificate = (Certificate) record;
} else if (record instanceof Key) {
Key key = (Key) record;
certificate = key.getCertificate();
} else {
throw new BadDataException();
}
return certificate;
}
private Key readKey(InputStream inputStream) throws BadDataException, IOException {
KeyMaterial record = keyReaderBackend.read(inputStream);
if (record instanceof Key) {
return (Key) record;
}
throw new BadDataException();
}
@Override
public Certificate getBySpecialName(String specialName)
throws IOException, BadNameException, BadDataException {
File certFile = resolver.getCertFileBySpecialName(specialName);
if (!certFile.exists()) {
return null;
}
FileInputStream fileIn = new FileInputStream(certFile);
BufferedInputStream bufferedIn = new BufferedInputStream(fileIn);
Certificate certificate = readCertificate(bufferedIn);
return certificate;
}
@Override
public Certificate getByFingerprintIfChanged(String fingerprint, String tag)
throws IOException, BadNameException, BadDataException {
Certificate certificate = getByFingerprint(fingerprint);
if (certificate.getTag().equals(tag)) {
return null;
}
return certificate;
}
@Override
public Certificate getBySpecialNameIfChanged(String specialName, String tag)
throws IOException, BadNameException, BadDataException {
Certificate certificate = getBySpecialName(specialName);
if (certificate.getTag().equals(tag)) {
return null;
}
return certificate;
}
@Override
public Key getTrustRoot() throws IOException, BadDataException {
File keyFile;
try {
keyFile = resolver.getKeyFileBySpecialName(SpecialNames.TRUST_ROOT);
} catch (BadNameException e) {
throw new RuntimeException("trust-root MUST be a known special name", e);
}
if (!keyFile.exists()) {
return null;
}
FileInputStream fileIn = new FileInputStream(keyFile);
BufferedInputStream bufferedInputStream = new BufferedInputStream(fileIn);
Key key = readKey(bufferedInputStream);
return key;
}
@Override
public Key getTrustRootIfChanged(String tag) throws IOException, BadDataException {
// TODO: The tag is likely intended for performance improvements,
// so really we should look it up somewhere without the need to parse the whole key.
Key key = getTrustRoot();
if (key.getTag().equals(tag)) {
return null;
}
return key;
}
@Override
public Certificate insert(InputStream data, CertificateMerger merge)
throws IOException, BadDataException, InterruptedException {
writeLock.lockDirectory();
Certificate certificate = _insert(data, merge);
writeLock.releaseDirectory();
return certificate;
}
@Override
public Certificate tryInsert(InputStream data, CertificateMerger merge)
throws IOException, BadDataException {
if (!writeLock.tryLockDirectory()) {
return null;
}
Certificate certificate = _insert(data, merge);
writeLock.releaseDirectory();
return certificate;
}
private Certificate _insert(InputStream data, CertificateMerger merge)
throws IOException, BadDataException {
Certificate newCertificate = readCertificate(data);
Certificate existingCertificate;
File certFile;
try {
existingCertificate = getByFingerprint(newCertificate.getFingerprint());
certFile = resolver.getCertFileByFingerprint(newCertificate.getFingerprint());
} catch (BadNameException e) {
throw new BadDataException();
}
if (existingCertificate != null && !existingCertificate.getTag().equals(newCertificate.getTag())) {
newCertificate = merge.merge(newCertificate, existingCertificate);
}
writeToFile(newCertificate.getInputStream(), certFile);
return newCertificate;
}
private Key _insertTrustRoot(InputStream data, KeyMerger merge)
throws IOException, BadDataException {
Key newKey = readKey(data);
Key existingKey;
File keyFile;
try {
existingKey = getTrustRoot();
keyFile = resolver.getKeyFileBySpecialName(SpecialNames.TRUST_ROOT);
} catch (BadNameException e) {
throw new RuntimeException(String.format("trust-root MUST be known special name.", e));
}
if (existingKey != null && !existingKey.getTag().equals(newKey.getTag())) {
newKey = merge.merge(newKey, existingKey);
}
writeToFile(newKey.getInputStream(), keyFile);
return newKey;
}
@Override
public Key insertTrustRoot(InputStream data, KeyMerger merge) throws IOException, BadDataException, InterruptedException {
writeLock.lockDirectory();
Key key = _insertTrustRoot(data, merge);
writeLock.releaseDirectory();
return key;
}
@Override
public Key tryInsertTrustRoot(InputStream data, KeyMerger merge) throws IOException, BadDataException {
return null;
}
private void writeToFile(InputStream inputStream, File certFile)
throws IOException {
certFile.getParentFile().mkdirs();
if (!certFile.exists() && !certFile.createNewFile()) {
throw new IOException("Could not create cert file " + certFile.getAbsolutePath());
}
FileOutputStream fileOut = new FileOutputStream(certFile);
byte[] buffer = new byte[4096];
int read;
while ((read = inputStream.read(buffer)) != -1) {
fileOut.write(buffer, 0, read);
}
inputStream.close();
fileOut.close();
}
@Override
public Certificate insertWithSpecialName(String specialName, InputStream data, CertificateMerger merge)
throws IOException, BadNameException, BadDataException, InterruptedException {
writeLock.lockDirectory();
Certificate certificate = _insertSpecial(specialName, data, merge);
writeLock.releaseDirectory();
return certificate;
}
@Override
public Certificate tryInsertWithSpecialName(String specialName, InputStream data, CertificateMerger merge)
throws IOException, BadNameException, BadDataException {
if (!writeLock.tryLockDirectory()) {
return null;
}
Certificate certificate = _insertSpecial(specialName, data, merge);
writeLock.releaseDirectory();
return certificate;
}
private Certificate _insertSpecial(String specialName, InputStream data, CertificateMerger merge)
throws IOException, BadNameException, BadDataException {
Certificate newCertificate = readCertificate(data);
Certificate existingCertificate = getBySpecialName(specialName);
File certFile = resolver.getCertFileBySpecialName(specialName);
if (existingCertificate != null && !existingCertificate.getTag().equals(newCertificate.getTag())) {
newCertificate = merge.merge(newCertificate, existingCertificate);
}
writeToFile(newCertificate.getInputStream(), certFile);
return newCertificate;
}
@Override
public Iterator<Certificate> items() {
return new Iterator<Certificate>() {
private final List<Lazy<Certificate>> certificateQueue = Collections.synchronizedList(new ArrayList<>());
// Constructor... wtf.
{
File[] subdirectories = resolver.getBaseDirectory().listFiles(new FileFilter() {
@Override
public boolean accept(File file) {
return file.isDirectory() && file.getName().matches("^[a-f0-9]{2}$");
}
});
for (File subdirectory : subdirectories) {
File[] files = subdirectory.listFiles(new FileFilter() {
@Override
public boolean accept(File file) {
return file.isFile() && file.getName().matches("^[a-f0-9]{38}$");
}
});
for (File certFile : files) {
certificateQueue.add(new Lazy<Certificate>() {
@Override
Certificate get() throws BadDataException {
try {
Certificate certificate = readCertificate(new FileInputStream(certFile));
if (!(subdirectory.getName() + certFile.getName()).equals(certificate.getFingerprint())) {
throw new BadDataException();
}
return certificate;
} catch (IOException e) {
throw new AssertionError("File got deleted.");
}
}
});
}
}
}
@Override
public boolean hasNext() {
return !certificateQueue.isEmpty();
}
@Override
public Certificate next() {
try {
return certificateQueue.remove(0).get();
} catch (BadDataException e) {
throw new AssertionError("Could not retrieve item: " + e.getMessage());
}
}
};
}
private abstract static class Lazy<E> {
abstract E get() throws BadDataException;
}
@Override
public Iterator<String> fingerprints() {
Iterator<Certificate> certificates = items();
return new Iterator<String>() {
@Override
public boolean hasNext() {
return certificates.hasNext();
}
@Override
public String next() {
return certificates.next().getFingerprint();
}
};
}
}

39
pgp-cert-d-java/src/main/java/pgp/cert_d/WritingPGPCertificateDirectory.java Normal file
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@ -0,0 +1,39 @@
// SPDX-FileCopyrightText: 2022 Paul Schaub <vanitasvitae@fsfe.org>
//
// SPDX-License-Identifier: Apache-2.0
package pgp.cert_d;
import pgp.certificate_store.Certificate;
import pgp.certificate_store.KeyMaterial;
import pgp.certificate_store.KeyMaterialMerger;
import pgp.certificate_store.exception.BadDataException;
import pgp.certificate_store.exception.BadNameException;
import java.io.IOException;
import java.io.InputStream;
public interface WritingPGPCertificateDirectory {
KeyMaterial getTrustRoot()
throws IOException, BadDataException;
KeyMaterial insertTrustRoot(InputStream data, KeyMaterialMerger merge)
throws IOException, BadDataException, InterruptedException;
KeyMaterial tryInsertTrustRoot(InputStream data, KeyMaterialMerger merge)
throws IOException, BadDataException;
Certificate insert(InputStream data, KeyMaterialMerger merge)
throws IOException, BadDataException, InterruptedException;
Certificate tryInsert(InputStream data, KeyMaterialMerger merge)
throws IOException, BadDataException;
Certificate insertWithSpecialName(String specialName, InputStream data, KeyMaterialMerger merge)
throws IOException, BadDataException, BadNameException, InterruptedException;
Certificate tryInsertWithSpecialName(String specialName, InputStream data, KeyMaterialMerger merge)
throws IOException, BadDataException, BadNameException;
}

4
pgp-cert-d-java/src/test/java/pgp/cert_d/FilenameResolverTest.java
View File

@ -18,13 +18,13 @@ import static org.junit.jupiter.api.Assertions.assertThrows;
public class FilenameResolverTest {
private File baseDir;
private FilenameResolver resolver;
private FileBasedCertificateDirectoryBackend.FilenameResolver resolver;
@BeforeEach
public void setup() throws IOException {
baseDir = Files.createTempDirectory("filenameresolver").toFile();
baseDir.deleteOnExit();
resolver = new FilenameResolver(baseDir);
resolver = new FileBasedCertificateDirectoryBackend.FilenameResolver(baseDir);
}
@Test

32
pgp-certificate-store/src/main/java/pgp/certificate_store/Certificate.java
View File

@ -4,37 +4,13 @@
package pgp.certificate_store;
import java.io.IOException;
import java.io.InputStream;
import java.util.Set;
/**
* OpenPGP certificate (public key).
*/
public abstract class Certificate implements KeyMaterial {
/**
* Return an {@link InputStream} of the binary representation of the certificate.
*
* @return input stream
* @throws IOException in case of an IO error
*/
public abstract InputStream getInputStream() throws IOException;
/**
* Return a tag of the certificate.
* The tag is a checksum calculated over the binary representation of the certificate.
*
* @return tag
* @throws IOException in case of an IO error
*/
public abstract String getTag() throws IOException;
/**
* Return a {@link Set} containing key-ids of subkeys.
*
* @return subkeys
* @throws IOException in case of an IO error
*/
public abstract Set<Long> getSubkeyIds() throws IOException;
@Override
public Certificate asCertificate() {
return this;
}
}

30
pgp-certificate-store/src/main/java/pgp/certificate_store/CertificateDirectory.java
View File

@ -54,12 +54,12 @@ public interface CertificateDirectory {
/**
* Insert a certificate into the store.
* If an instance of the certificate is already present in the store, the given {@link CertificateMerger} will be
* If an instance of the certificate is already present in the store, the given {@link KeyMaterialMerger} will be
* used to merge both the existing and the new instance of the {@link Certificate}. The resulting merged certificate
* will be stored in the store and returned.
*
* This method will block until a write-lock on the store can be acquired. If you cannot afford blocking,
* consider to use {@link #tryInsertCertificate(InputStream, CertificateMerger)} instead.
* consider to use {@link #tryInsertCertificate(InputStream, KeyMaterialMerger)} instead.
*
* @param data input stream containing the new certificate instance
* @param merge callback for merging with an existing certificate instance
@ -69,12 +69,12 @@ public interface CertificateDirectory {
* @throws InterruptedException in case the inserting thread gets interrupted
* @throws BadDataException if the data stream does not contain valid OpenPGP data
*/
Certificate insertCertificate(InputStream data, CertificateMerger merge)
Certificate insertCertificate(InputStream data, KeyMaterialMerger merge)
throws IOException, InterruptedException, BadDataException;
/**
* Insert a certificate into the store.
* If an instance of the certificate is already present in the store, the given {@link CertificateMerger} will be
* If an instance of the certificate is already present in the store, the given {@link KeyMaterialMerger} will be
* used to merge both the existing and the new instance of the {@link Certificate}. The resulting merged certificate
* will be stored in the store and returned.
*
@ -90,19 +90,19 @@ public interface CertificateDirectory {
* @throws IOException in case of an IO-error
* @throws BadDataException if the data stream does not contain valid OpenPGP data
*/
Certificate tryInsertCertificate(InputStream data, CertificateMerger merge)
Certificate tryInsertCertificate(InputStream data, KeyMaterialMerger merge)
throws IOException, BadDataException;
/**
* Insert a certificate into the store.
* The certificate will be stored under the given special name instead of its fingerprint.
*
* If an instance of the certificate is already present under the special name in the store, the given {@link CertificateMerger} will be
* If an instance of the certificate is already present under the special name in the store, the given {@link KeyMaterialMerger} will be
* used to merge both the existing and the new instance of the {@link Certificate}. The resulting merged certificate
* will be stored in the store and returned.
*
* This method will block until a write-lock on the store can be acquired. If you cannot afford blocking,
* consider to use {@link #tryInsertCertificateBySpecialName(String, InputStream, CertificateMerger)} instead.
* consider to use {@link #tryInsertCertificateBySpecialName(String, InputStream, KeyMaterialMerger)} instead.
*
* @param specialName special name of the certificate
* @param data input stream containing the new certificate instance
@ -114,14 +114,14 @@ public interface CertificateDirectory {
* @throws BadDataException if the certificate file does not contain valid OpenPGP data
* @throws BadNameException if the special name is unknown
*/
Certificate insertCertificateBySpecialName(String specialName, InputStream data, CertificateMerger merge)
Certificate insertCertificateBySpecialName(String specialName, InputStream data, KeyMaterialMerger merge)
throws IOException, InterruptedException, BadDataException, BadNameException;
/**
* Insert a certificate into the store.
* The certificate will be stored under the given special name instead of its fingerprint.
*
* If an instance of the certificate is already present under the special name in the store, the given {@link CertificateMerger} will be
* If an instance of the certificate is already present under the special name in the store, the given {@link KeyMaterialMerger} will be
* used to merge both the existing and the new instance of the {@link Certificate}. The resulting merged certificate
* will be stored in the store and returned.
*
@ -139,7 +139,7 @@ public interface CertificateDirectory {
* @throws BadDataException if the data stream does not contain valid OpenPGP data
* @throws BadNameException if the special name is not known
*/
Certificate tryInsertCertificateBySpecialName(String specialName, InputStream data, CertificateMerger merge)
Certificate tryInsertCertificateBySpecialName(String specialName, InputStream data, KeyMaterialMerger merge)
throws IOException, BadDataException, BadNameException;
/**
@ -186,7 +186,7 @@ public interface CertificateDirectory {
/**
* Insert the given trust-root key into the store.
* If the key store already holds a trust-root key, the given {@link KeyMerger} callback will be used to merge
* If the key store already holds a trust-root key, the given {@link KeyMaterialMerger} callback will be used to merge
* the two instances into one {@link Key}. The result will be stored in the store and returned.
*
* This method will not block. Instead, if the store is already write-locked, this method will simply return null
@ -202,16 +202,16 @@ public interface CertificateDirectory {
* @throws InterruptedException in case the inserting thread gets interrupted
* @throws BadDataException if the data stream does not contain a valid OpenPGP key
*/
Key insertTrustRoot(InputStream data, KeyMerger keyMerger)
Key insertTrustRoot(InputStream data, KeyMaterialMerger keyMerger)
throws IOException, InterruptedException, BadDataException;
/**
* Insert the given trust-root key into the store.
* If the key store already holds a trust-root key, the given {@link KeyMerger} callback will be used to merge
* If the key store already holds a trust-root key, the given {@link KeyMaterialMerger} callback will be used to merge
* the two instances into one {@link Key}. The result will be stored in the store and returned.
*
* This method will block until a write-lock on the store can be acquired. If you cannot afford blocking,
* consider using {@link #tryInsertTrustRoot(InputStream, KeyMerger)} instead.
* consider using {@link #tryInsertTrustRoot(InputStream, KeyMaterialMerger)} instead.
*
* @param data input stream containing the new trust-root key
* @param keyMerger callback for merging with an existing key instance
@ -220,6 +220,6 @@ public interface CertificateDirectory {
* @throws IOException in case of an IO error
* @throws BadDataException if the data stream does not contain a valid OpenPGP key
*/
Key tryInsertTrustRoot(InputStream data, KeyMerger keyMerger)
Key tryInsertTrustRoot(InputStream data, KeyMaterialMerger keyMerger)
throws IOException, BadDataException;
}

27
pgp-certificate-store/src/main/java/pgp/certificate_store/CertificateMerger.java
View File

@ -1,27 +0,0 @@
// SPDX-FileCopyrightText: 2022 Paul Schaub <vanitasvitae@fsfe.org>
//
// SPDX-License-Identifier: Apache-2.0
package pgp.certificate_store;
import java.io.IOException;
/**
* Merge a given certificate (update) with an existing certificate.
*/
public interface CertificateMerger {
/**
* Merge the given certificate data with the existing certificate and return the result.
*
* If no existing certificate is found (i.e. existing is null), this method returns the unmodified data.
*
* @param data certificate
* @param existing optional already existing copy of the certificate
* @return merged certificate
*
* @throws IOException in case of an IO error
*/
Certificate merge(Certificate data, Certificate existing) throws IOException;
}

16
pgp-certificate-store/src/main/java/pgp/certificate_store/Key.java
View File

@ -4,9 +4,6 @@
package pgp.certificate_store;
import java.io.IOException;
import java.io.InputStream;
/**
* OpenPGP key (secret key).
*/
@ -19,14 +16,9 @@ public abstract class Key implements KeyMaterial {
*/
public abstract Certificate getCertificate();
/**
* Return an {@link InputStream} of the binary representation of the secret key.
*
* @return input stream
* @throws IOException in case of an IO error
*/
public abstract InputStream getInputStream() throws IOException;
public abstract String getTag() throws IOException;
@Override
public Certificate asCertificate() {
return getCertificate();
}
}

23
pgp-certificate-store/src/main/java/pgp/certificate_store/KeyMaterial.java
View File

@ -4,6 +4,10 @@
package pgp.certificate_store;
import java.io.IOException;
import java.io.InputStream;
import java.util.Set;
public interface KeyMaterial {
/**
@ -14,4 +18,23 @@ public interface KeyMaterial {
*/
String getFingerprint();
Certificate asCertificate();
/**
* Return an {@link InputStream} of the binary representation of the secret key.
*
* @return input stream
* @throws IOException in case of an IO error
*/
InputStream getInputStream() throws IOException;
String getTag() throws IOException;
/**
* Return a {@link Set} containing key-ids of subkeys.
*
* @return subkeys
* @throws IOException in case of an IO error
*/
Set<Long> getSubkeyIds() throws IOException;
}

25
pgp-certificate-store/src/main/java/pgp/certificate_store/KeyMaterialMerger.java Normal file
View File

@ -0,0 +1,25 @@
// SPDX-FileCopyrightText: 2022 Paul Schaub <vanitasvitae@fsfe.org>
//
// SPDX-License-Identifier: Apache-2.0
package pgp.certificate_store;
import java.io.IOException;
/**
* Merge a given {@link Key} (update) with an existing {@link Key}.
*/
public interface KeyMaterialMerger {
/**
* Merge the given key material with an existing copy and return the result.
* If no existing {@link KeyMaterial} is found (i.e. if existing is null), this method returns the unmodified data.
*
* @param data key material
* @param existing optional already existing copy of the key material
* @return merged key material
*
* @throws IOException in case of an IO error
*/
KeyMaterial merge(KeyMaterial data, KeyMaterial existing) throws IOException;
}

2
pgp-certificate-store/src/main/java/pgp/certificate_store/KeyReaderBackend.java → pgp-certificate-store/src/main/java/pgp/certificate_store/KeyMaterialReaderBackend.java
View File

@ -9,7 +9,7 @@ import pgp.certificate_store.exception.BadDataException;
import java.io.IOException;
import java.io.InputStream;
public interface KeyReaderBackend {
public interface KeyMaterialReaderBackend {
/**
* Read a {@link KeyMaterial} (either {@link Key} or {@link Certificate}) from the given {@link InputStream}.

25
pgp-certificate-store/src/main/java/pgp/certificate_store/KeyMerger.java
View File

@ -1,25 +0,0 @@
// SPDX-FileCopyrightText: 2022 Paul Schaub <vanitasvitae@fsfe.org>
//
// SPDX-License-Identifier: Apache-2.0
package pgp.certificate_store;
import java.io.IOException;
/**
* Merge a given {@link Key} (update) with an existing {@link Key}.
*/
public interface KeyMerger {
/**
* Merge the given key data with the existing {@link Key} and return the result.
* If no existing {@link Key} is found (i.e. if existing is null), this method returns the unmodified data.
*
* @param data key
* @param existing optional already existing copy of the key
* @return merged key
*
* @throws IOException in case of an IO error
*/
Key merge(Key data, Key existing) throws IOException;
}