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Code Issues Releases Wiki Activity

It clicked for me; Simplified edge/reverseEdge finding

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This commit is contained in:
Paul Schaub 2023-06-25 12:53:31 +02:00
parent 08c469e041
commit 48ffc85ce5
Signed by: vanitasvitae
GPG key ID: 62BEE9264BF17311
6 changed files with 250 additions and 60 deletions
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93
pgpainless-wot/src/main/java/org/pgpainless/wot/WebOfTrust.java
View file

@ -152,9 +152,6 @@ public class WebOfTrust implements CertificateAuthority {
// Target -> Issuer, Signatures on the target
private final Map<OpenPgpFingerprint, List<CertificationSet>> reverseEdges = new HashMap<>();
// TODO: Get rid of this
Map<OpenPgpFingerprint, Map<OpenPgpFingerprint, List<Certification>>> certifications = new HashMap<>();
private final Iterable<KeyRingInfo> validatedCertificates;
private final Policy policy;
private final ReferenceTime referenceTime;
@ -167,8 +164,7 @@ public class WebOfTrust implements CertificateAuthority {
this.referenceTime = referenceTime;
synopsizeCertificates();
processSignaturesOnCertificates();
identifyEdges();
findEdges();
}
private void synopsizeCertificates() {
@ -204,15 +200,15 @@ public class WebOfTrust implements CertificateAuthority {
new HashSet<>(cert.getValidUserIds())));
}
private void processSignaturesOnCertificates() {
private void findEdges() {
// Identify certifications and delegations
// Target = cert carrying a signature
for (KeyRingInfo validatedTarget : validatedCertificates) {
processSigsOnCert(validatedTarget);
findEdgesWithTarget(validatedTarget);
}
}
private void processSigsOnCert(KeyRingInfo validatedTarget) {
private void findEdgesWithTarget(KeyRingInfo validatedTarget) {
PGPPublicKeyRing validatedTargetKeyRing = KeyRingUtils.publicKeys(validatedTarget.getKeys());
OpenPgpFingerprint targetFingerprint = OpenPgpFingerprint.of(validatedTargetKeyRing);
PGPPublicKey targetPrimaryKey = validatedTargetKeyRing.getPublicKey();
@ -221,7 +217,7 @@ public class WebOfTrust implements CertificateAuthority {
// Direct-Key Signatures (delegations) by X on Y
List<PGPSignature> delegations = SignatureUtils.getDelegations(validatedTargetKeyRing);
for (PGPSignature delegation : delegations) {
indexAndVerifyDelegation(targetPrimaryKey, target, delegation);
processDelegation(targetPrimaryKey, target, delegation);
}
// Certification Signatures by X on Y over user-ID U
@ -229,38 +225,38 @@ public class WebOfTrust implements CertificateAuthority {
while (userIds.hasNext()) {
String userId = userIds.next();
List<PGPSignature> userIdSigs = SignatureUtils.get3rdPartyCertificationsFor(userId, validatedTargetKeyRing);
indexAndVerifyCertifications(targetPrimaryKey, target, userId, userIdSigs);
processCertification(targetPrimaryKey, target, userId, userIdSigs);
}
}
private void indexAndVerifyDelegation(PGPPublicKey targetPrimaryKey, CertSynopsis target, PGPSignature delegation) {
private void processDelegation(PGPPublicKey targetPrimaryKey,
CertSynopsis target,
PGPSignature delegation) {
List<KeyRingInfo> issuerCandidates = byKeyId.get(delegation.getKeyID());
if (issuerCandidates == null) {
return;
}
for (KeyRingInfo candidate : issuerCandidates) {
PGPPublicKeyRing issuerKeyRing = KeyRingUtils.publicKeys(candidate.getKeys());
OpenPgpFingerprint issuerFingerprint = OpenPgpFingerprint.of(issuerKeyRing);
PGPPublicKey issuerSigningKey = issuerKeyRing.getPublicKey(delegation.getKeyID());
CertSynopsis issuer = certSynopsisMap.get(issuerFingerprint);
boolean valid = false;
try {
valid = SignatureVerifier.verifyDirectKeySignature(delegation, issuerSigningKey, targetPrimaryKey, policy, referenceTime.getTimestamp());
boolean valid = SignatureVerifier.verifyDirectKeySignature(delegation, issuerSigningKey,
targetPrimaryKey, policy, referenceTime.getTimestamp());
if (valid) {
indexEdge(new Certification(issuer, Optional.empty(), target, delegation));
}
} catch (SignatureValidationException e) {
LOGGER.warn("Cannot verify signature by " + issuerFingerprint + " on cert of " + OpenPgpFingerprint.of(targetPrimaryKey), e);
}
if (valid) {
Map<OpenPgpFingerprint, List<Certification>> sigsBy = getOrDefault(certifications, issuerFingerprint, HashMap::new);
List<Certification> targetSigs = getOrDefault(sigsBy, target.getFingerprint(), ArrayList::new);
targetSigs.add(new Certification(issuer, Optional.empty(), target, delegation));
}
}
}
private void indexAndVerifyCertifications(PGPPublicKey targetPrimaryKey, CertSynopsis target, String userId, List<PGPSignature> userIdSigs) {
private void processCertification(PGPPublicKey targetPrimaryKey,
CertSynopsis target,
String userId, List<PGPSignature> userIdSigs) {
for (PGPSignature certification : userIdSigs) {
List<KeyRingInfo> issuerCandidates = byKeyId.get(certification.getKeyID());
if (issuerCandidates == null) {
@ -274,12 +270,10 @@ public class WebOfTrust implements CertificateAuthority {
CertSynopsis issuer = certSynopsisMap.get(issuerFingerprint);
try {
boolean valid = SignatureVerifier.verifySignatureOverUserId(userId, certification, issuerSigningKey, targetPrimaryKey, policy, referenceTime.getTimestamp());
boolean valid = SignatureVerifier.verifySignatureOverUserId(userId, certification,
issuerSigningKey, targetPrimaryKey, policy, referenceTime.getTimestamp());
if (valid) {
Map<OpenPgpFingerprint, List<Certification>> sigsBy = getOrDefault(certifications, issuerFingerprint, HashMap::new);
List<Certification> targetSigs = getOrDefault(sigsBy, target.getFingerprint(), ArrayList::new);
targetSigs.add(new Certification(issuer, Optional.just(userId), target, certification));
indexEdge(new Certification(issuer, Optional.just(userId), target, certification));
}
} catch (SignatureValidationException e) {
LOGGER.warn("Cannot verify signature for '" + userId + "' by " + issuerFingerprint + " on cert of " + target.getFingerprint(), e);
@ -288,28 +282,37 @@ public class WebOfTrust implements CertificateAuthority {
}
}
private void identifyEdges() {
// Re-order data structure
for (OpenPgpFingerprint issuerFp : certifications.keySet()) {
Map<OpenPgpFingerprint, List<Certification>> issuedBy = certifications.get(issuerFp);
private void indexEdge(Certification certification) {
OpenPgpFingerprint issuer = certification.getIssuer().getFingerprint();
OpenPgpFingerprint target = certification.getTarget().getFingerprint();
// one issuer can issue many edges
List<CertificationSet> outEdges = new ArrayList<>();
for (OpenPgpFingerprint targetFp : issuedBy.keySet()) {
List<CertificationSet> outEdges = getOrDefault(edges, issuer, ArrayList::new);
indexOutEdge(outEdges, certification);
List<Certification> onCert = issuedBy.get(targetFp);
CertificationSet edgeSigs = CertificationSet.empty(certSynopsisMap.get(issuerFp), certSynopsisMap.get(targetFp));
for (Certification certification : onCert) {
edgeSigs.add(certification);
}
outEdges.add(edgeSigs);
List<CertificationSet> reverseEdge = getOrDefault(reverseEdges, targetFp, ArrayList::new);
reverseEdge.add(edgeSigs);
List<CertificationSet> inEdges = getOrDefault(reverseEdges, target, ArrayList::new);
indexInEdge(inEdges, certification);
}
private void indexOutEdge(List<CertificationSet> outEdges, Certification certification) {
OpenPgpFingerprint target = certification.getTarget().getFingerprint();
for (CertificationSet outEdge : outEdges) {
if (target.equals(outEdge.getTarget().getFingerprint())) {
outEdge.add(certification);
return;
}
edges.put(issuerFp, outEdges);
}
outEdges.add(CertificationSet.fromCertification(certification));
}
private void indexInEdge(List<CertificationSet> inEdges, Certification certification) {
OpenPgpFingerprint issuer = certification.getIssuer().getFingerprint();
for (CertificationSet inEdge : inEdges) {
if (issuer.equals(inEdge.getIssuer().getFingerprint())) {
inEdge.add(certification);
return;
}
}
inEdges.add(CertificationSet.fromCertification(certification));
}
/**
@ -322,6 +325,10 @@ public class WebOfTrust implements CertificateAuthority {
}
}
Network getNetwork() {
return network;
}
// Map signature to its revocation state
private static RevocationState revocationStateFromSignature(PGPSignature revocation) {
if (revocation == null) {

12
pgpainless-wot/src/main/java/org/pgpainless/wot/WebOfTrustCertificateStore.java
View file

@ -10,6 +10,8 @@ import pgp.certificate_store.exception.BadDataException;
import java.io.IOException;
import java.util.Iterator;
import java.util.NoSuchElementException;
import pgp.certificate_store.certificate.Certificate;
public class WebOfTrustCertificateStore extends PGPCertificateDirectory {
@ -20,7 +22,15 @@ public class WebOfTrustCertificateStore extends PGPCertificateDirectory {
public Iterator<Certificate> getAllItems()
throws BadDataException, IOException {
Iterator<Certificate> trustRootAndCerts = new PrefixedIterator<>(getTrustRootCertificate(), items());
Certificate trustRoot;
try {
trustRoot = getTrustRootCertificate();
} catch (NoSuchElementException e) {
// ignore
trustRoot = null;
}
Iterator<Certificate> trustRootAndCerts = new PrefixedIterator<>(trustRoot, items());
return trustRootAndCerts;
}
}

131
pgpainless-wot/src/test/java/org/pgpainless/wot/WebOfTrustTest.java
View file

@ -4,23 +4,148 @@
package org.pgpainless.wot;
import org.junit.jupiter.api.Test;
import org.pgpainless.wot.testfixtures.TestCertificateStores;
import pgp.certificate_store.exception.BadDataException;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertNotNull;
import static org.junit.jupiter.api.Assertions.assertNull;
import static org.junit.jupiter.api.Assertions.assertTrue;
import java.io.IOException;
import java.util.List;
import org.junit.jupiter.api.Test;
import org.pgpainless.key.OpenPgpFingerprint;
import org.pgpainless.wot.dijkstra.sq.CertificationSet;
import org.pgpainless.wot.dijkstra.sq.Network;
import org.pgpainless.wot.testfixtures.TestCertificateStores;
import org.pgpainless.wot.testfixtures.WotTestVectors;
import pgp.certificate_store.exception.BadDataException;
public class WebOfTrustTest {
OpenPgpFingerprint fooBankCa = OpenPgpFingerprint.of(WotTestVectors.getTestVectors().getFreshFooBankCaCert());
OpenPgpFingerprint fooBankEmployee = OpenPgpFingerprint.of(WotTestVectors.getTestVectors().getFreshFooBankEmployeeCert());
OpenPgpFingerprint fooBankAdmin = OpenPgpFingerprint.of(WotTestVectors.getTestVectors().getFreshFooBankAdminCert());
OpenPgpFingerprint barBankCa = OpenPgpFingerprint.of(WotTestVectors.getTestVectors().getFreshBarBankCaCert());
OpenPgpFingerprint barBankEmployee = OpenPgpFingerprint.of(WotTestVectors.getTestVectors().getFreshBarBankEmployeeCert());
public WebOfTrustTest() throws IOException {
}
@Test
public void testWithTwoNodesAndOneDelegation() throws BadDataException, IOException, InterruptedException {
WebOfTrustCertificateStore store = TestCertificateStores.oneDelegationGraph();
WebOfTrust wot = new WebOfTrust(store);
wot.initialize();
Network network = wot.getNetwork();
assertEquals(2, network.getNodes().size());
assertHasEdge(network, fooBankAdmin, barBankCa);
assertHasReverseEdge(network, fooBankAdmin, barBankCa);
assertHasNoEdge(network, barBankCa, fooBankAdmin);
assertHasNoReverseEdge(network, barBankCa, fooBankAdmin);
}
@Test
public void testWithCrossSignedCertificates()
throws BadDataException, IOException, InterruptedException {
WebOfTrustCertificateStore store = TestCertificateStores.disconnectedGraph();
WebOfTrust wot = new WebOfTrust(store);
wot.initialize();
Network network = wot.getNetwork();
assertEquals(5, network.getNodes().size());
assertTrue(network.getNodes().containsKey(fooBankCa));
assertTrue(network.getNodes().containsKey(fooBankEmployee));
assertTrue(network.getNodes().containsKey(fooBankAdmin));
assertTrue(network.getNodes().containsKey(barBankCa));
assertTrue(network.getNodes().containsKey(barBankEmployee));
// Exemplary edge
List<CertificationSet> fooBankCaEdges = network.getEdges().get(fooBankCa);
assertEquals(2, fooBankCaEdges.size());
CertificationSet fbc2fbe = getEdgeFromTo(network, fooBankCa, fooBankEmployee);
assertNotNull(fbc2fbe);
CertificationSet fbc2fba = getEdgeFromTo(network, fooBankCa, fooBankAdmin);
assertNotNull(fbc2fba);
assertHasIssuerAndTarget(fbc2fba, fooBankCa, fooBankAdmin);
assertHasIssuerAndTarget(fbc2fbe, fooBankCa, fooBankEmployee);
assertHasEdge(network, barBankCa, barBankEmployee);
assertHasReverseEdge(network, barBankCa, barBankEmployee);
assertHasNoEdge(network, fooBankCa, barBankCa);
assertHasNoReverseEdge(network, fooBankCa, barBankCa);
// CHECKSTYLE:OFF
System.out.println(wot);
// CHECKSTYLE:ON
}
private void assertHasIssuerAndTarget(CertificationSet certifications, OpenPgpFingerprint issuer, OpenPgpFingerprint target) {
assertEquals(issuer, certifications.getIssuer().getFingerprint());
assertEquals(target, certifications.getTarget().getFingerprint());
}
private void assertHasEdge(Network network, OpenPgpFingerprint issuer, OpenPgpFingerprint target) {
assertNotNull(getEdgeFromTo(network, issuer, target), "Expected edge from " + issuer + " to " + target + " but got none.");
}
private void assertHasReverseEdge(Network network, OpenPgpFingerprint issuer, OpenPgpFingerprint target) {
assertNotNull(getReverseEdgeFromTo(network, issuer, target), "Expected reverse edge to " + target + " from " + issuer + " but got none.");
}
private void assertHasNoEdge(Network network, OpenPgpFingerprint issuer, OpenPgpFingerprint target) {
CertificationSet edge = getEdgeFromTo(network, issuer, target);
assertNull(edge, "Expected no edge from " + issuer + " to " + target + " but got " + edge);
}
private void assertHasNoReverseEdge(Network network, OpenPgpFingerprint issuer, OpenPgpFingerprint target) {
CertificationSet reverseEdge = getReverseEdgeFromTo(network, issuer, target);
assertNull(reverseEdge, "Expected no reverse edge on " + target + " from " + issuer + " but got " + reverseEdge);
}
private CertificationSet getEdgeFromTo(Network network, OpenPgpFingerprint issuer, OpenPgpFingerprint target) {
List<CertificationSet> edges = network.getEdges().get(issuer);
if (edges == null) {
return null;
}
for (CertificationSet certifications : edges) {
if (target.equals(certifications.getTarget().getFingerprint())) {
return certifications;
}
}
return null;
}
private CertificationSet getReverseEdgeFromTo(Network network, OpenPgpFingerprint issuer, OpenPgpFingerprint target) {
List<CertificationSet> revEdges = network.getReverseEdges().get(target);
if (revEdges == null) {
return null;
}
for (CertificationSet certifications : revEdges) {
if (issuer.equals(certifications.getIssuer().getFingerprint())) {
return certifications;
}
}
return null;
}
@Test
public void testWotCreationOfEmptyCertificates() throws BadDataException, IOException {
WebOfTrustCertificateStore store = TestCertificateStores.emptyGraph();
WebOfTrust wot = new WebOfTrust(store);
wot.initialize();
Network network = wot.getNetwork();
assertTrue(network.getNodes().isEmpty());
assertTrue(network.getEdges().isEmpty());
assertTrue(network.getReverseEdges().isEmpty());
}
}

44
pgpainless-wot/src/testFixtures/java/org/pgpainless/wot/testfixtures/TestCertificateStores.java
View file

@ -28,20 +28,9 @@ public class TestCertificateStores {
}
};
private static InputStream requireResource(String resourceName) {
InputStream inputStream = TestCertificateStores.class.getClassLoader().getResourceAsStream(resourceName);
if (inputStream == null) {
throw new TestAbortedException("Cannot read resource " + resourceName + ": InputStream is null.");
}
return inputStream;
}
public static WebOfTrustCertificateStore disconnectedGraph()
throws BadDataException, IOException, InterruptedException {
SubkeyLookup subkeyLookup = new InMemorySubkeyLookup();
KeyMaterialReaderBackend readerBackend = new KeyMaterialReader();
PGPCertificateDirectory.Backend backend = new InMemoryCertificateDirectoryBackend(readerBackend);
WebOfTrustCertificateStore wotStore = new WebOfTrustCertificateStore(backend, subkeyLookup);
WebOfTrustCertificateStore wotStore = createInMemoryStore();
wotStore.insertTrustRoot(getTestVector("cross_signed/foobankCaCert.asc"), merger);
wotStore.insert(getTestVector("cross_signed/foobankEmployeeCert.asc"), merger);
@ -52,6 +41,37 @@ public class TestCertificateStores {
return wotStore;
}
public static WebOfTrustCertificateStore emptyGraph() {
WebOfTrustCertificateStore wotStore = createInMemoryStore();
return wotStore;
}
public static WebOfTrustCertificateStore oneDelegationGraph() throws BadDataException, IOException, InterruptedException {
WebOfTrustCertificateStore wotStore = createInMemoryStore();
wotStore.insert(getTestVector("cross_signed/foobankAdminCert.asc"), merger);
wotStore.insert(getTestVector("cross_signed/barbankCaCert.asc"), merger);
return wotStore;
}
private static WebOfTrustCertificateStore createInMemoryStore() {
SubkeyLookup subkeyLookup = new InMemorySubkeyLookup();
KeyMaterialReaderBackend readerBackend = new KeyMaterialReader();
PGPCertificateDirectory.Backend backend = new InMemoryCertificateDirectoryBackend(readerBackend);
WebOfTrustCertificateStore wotStore = new WebOfTrustCertificateStore(backend, subkeyLookup);
return wotStore;
}
private static InputStream requireResource(String resourceName) {
InputStream inputStream = TestCertificateStores.class.getClassLoader().getResourceAsStream(resourceName);
if (inputStream == null) {
throw new TestAbortedException("Cannot read resource " + resourceName + ": InputStream is null.");
}
return inputStream;
}
private static InputStream getTestVector(String testVectorName) {
return requireResource("test_vectors/" + testVectorName);
}

23
wot-dijkstra/src/main/java/org/pgpainless/wot/dijkstra/sq/CertificationSet.java
View file

@ -36,6 +36,12 @@ public final class CertificationSet {
return new CertificationSet(issuer, target, new HashMap<>());
}
public static CertificationSet fromCertification(Certification certification) {
CertificationSet set = CertificationSet.empty(certification.getIssuer(), certification.getTarget());
set.add(certification);
return set;
}
/**
* Create a {@link CertificationSet} from a single certification.
*
@ -67,6 +73,23 @@ public final class CertificationSet {
this.certifications = new HashMap<>(certifications);
}
public CertSynopsis getIssuer() {
return issuer;
}
public CertSynopsis getTarget() {
return target;
}
public Map<Optional<String>, List<Certification>> getCertifications() {
// Copy to avoid side effects
Map<Optional<String>, List<Certification>> copy = new HashMap<>();
for (Optional<String> key : certifications.keySet()) {
copy.put(key, new ArrayList<>(certifications.get(key)));
}
return copy;
}
/**
* Merge this {@link CertificationSet} with another instance.
* After the operation, this will contain {@link Certification Certifications} from both sets.

7
wot-dijkstra/src/main/java/org/pgpainless/wot/dijkstra/sq/Network.java
View file

@ -102,7 +102,12 @@ public class Network {
}
public String toString() {
StringBuilder sb = new StringBuilder("Network with " + getNodes().size() + " nodes, " + getEdges().size() + " edges:\n");
int edgeNum = 0;
for (List<CertificationSet> edgesFrom : edges.values()) {
edgeNum += edgesFrom.size();
}
StringBuilder sb = new StringBuilder("Network with " + getNodes().size() + " nodes, " + edgeNum + " edges:\n");
for (OpenPgpFingerprint issuer : getNodes().keySet()) {
for (CertificationSet edge : getReverseEdges().get(issuer)) {
sb.append(edge);