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Port WebOfTrust to Kotlin

This commit is contained in:
Paul Schaub 2023-06-29 19:03:05 +02:00
parent d9a5d6b926
commit 4f924c519c
Signed by: vanitasvitae
GPG key ID: 62BEE9264BF17311
8 changed files with 302 additions and 479 deletions

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// SPDX-FileCopyrightText: 2023 Paul Schaub <vanitasvitae@fsfe.org>
//
// SPDX-License-Identifier: Apache-2.0
package org.pgpainless.wot;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.NoSuchElementException;
import org.bouncycastle.bcpg.sig.RevocationReason;
import org.bouncycastle.openpgp.PGPPublicKey;
import org.bouncycastle.openpgp.PGPPublicKeyRing;
import org.bouncycastle.openpgp.PGPSignature;
import org.pgpainless.PGPainless;
import org.pgpainless.algorithm.KeyFlag;
import org.pgpainless.algorithm.RevocationState;
import org.pgpainless.exception.SignatureValidationException;
import org.pgpainless.key.OpenPgpFingerprint;
import org.pgpainless.key.info.KeyRingInfo;
import org.pgpainless.key.util.KeyRingUtils;
import org.pgpainless.key.util.RevocationAttributes;
import org.pgpainless.policy.Policy;
import org.pgpainless.signature.SignatureUtils;
import org.pgpainless.signature.consumer.SignatureVerifier;
import org.pgpainless.signature.subpackets.SignatureSubpacketsUtil;
import org.pgpainless.wot.dijkstra.sq.CertSynopsis;
import org.pgpainless.wot.dijkstra.sq.Certification;
import org.pgpainless.wot.dijkstra.sq.CertificationSet;
import org.pgpainless.wot.dijkstra.sq.Network;
import org.pgpainless.wot.dijkstra.sq.ReferenceTime;
import org.pgpainless.wot.sugar.IterableIterator;
import org.pgpainless.wot.sugar.PrefixedIterator;
import org.pgpainless.wot.sugar.Supplier;
import org.pgpainless.wot.util.CertificationFactory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import pgp.cert_d.PGPCertificateDirectory;
import pgp.certificate_store.certificate.Certificate;
import pgp.certificate_store.exception.BadDataException;
/**
* Build a Web of Trust from a set of certificates.
* <p>
* The process of building a WoT is as follows:
* <ul>
* <li>Consume and synopsize all certificates as network nodes</li>
* <li>Iterate over cross-certificate signatures and perform signature verification</li>
* <li>Identify signatures as edges between nodes</li>
* </ul>
*
* @see <a href="https://sequoia-pgp.gitlab.io/sequoia-wot/">OpenPGP Web of Trust</a>
*/
public class WebOfTrust {
private static final Logger LOGGER = LoggerFactory.getLogger(WebOfTrust.class);
private final PGPCertificateDirectory certificateStore;
private Network network;
public WebOfTrust(PGPCertificateDirectory certificateStore) {
this.certificateStore = certificateStore;
}
/**
* Do the heavy lifting of calculating the web of trust.
*/
public void initialize() throws BadDataException, IOException {
Certificate trustRoot = null;
try {
trustRoot = certificateStore.getTrustRootCertificate();
} catch (NoSuchElementException e) {
// ignore
}
Iterator<Certificate> certificates = certificateStore.items();
Iterator<Certificate> withTrustRoot = new PrefixedIterator<>(trustRoot, certificates);
IterableIterator<Certificate> iterable = new IterableIterator<>(withTrustRoot);
network = fromCertificates(iterable, PGPainless.getPolicy(), ReferenceTime.now());
}
/**
* Create a {@link Network} from a set of certificates.
*
* @param certificates set of certificates
* @param policy evaluation policy
* @param optReferenceTime reference time for evaluation
* @return network
*/
public static Network fromCertificates(
Iterable<Certificate> certificates,
Policy policy,
ReferenceTime optReferenceTime) {
ReferenceTime referenceTime = optReferenceTime == null ? ReferenceTime.now() : optReferenceTime;
List<KeyRingInfo> validCerts = parseValidCertificates(certificates, policy, referenceTime.getTimestamp());
LOGGER.debug("Successfully parsed " + validCerts.size() + " certificates.");
return fromValidCertificates(
validCerts,
policy,
referenceTime
);
}
private static List<KeyRingInfo> parseValidCertificates(Iterable<Certificate> certificates, Policy policy, Date referenceTime) {
// Parse all certificates
List<KeyRingInfo> validCerts = new ArrayList<>();
for (Certificate cert : certificates) {
try {
PGPPublicKeyRing publicKey = PGPainless.readKeyRing().publicKeyRing(cert.getInputStream());
// No Certificate data
if (publicKey == null) {
throw new IOException("Certificate " + cert.getFingerprint() + " was null. No certificate data?");
}
KeyRingInfo info = new KeyRingInfo(publicKey, policy, referenceTime);
if (info.getValidUserIds().isEmpty()) {
LOGGER.warn("Certificate " + cert.getFingerprint() + " has no valid user-ids. Ignore.");
// Ignore invalid cert
// TODO: Allow user-id-less certificates?
} else {
validCerts.add(info);
}
} catch (IOException e) {
LOGGER.warn("Could not parse certificate " + cert.getFingerprint(), e);
}
}
return validCerts;
}
/**
* Create a {@link Network} from a set of validated certificates.
*
* @param validatedCertificates set of validated certificates
* @param referenceTime reference time
* @return network
*/
public static Network fromValidCertificates(
List<KeyRingInfo> validatedCertificates,
Policy policy,
ReferenceTime referenceTime) {
// TODO: Move heavy lifting from NetworkBuilder constructor to buildNetwork()?
NetworkBuilder nb = new NetworkBuilder(validatedCertificates, policy, referenceTime);
return nb.buildNetwork();
}
/**
* Class for building the {@link Network Flow network} from the given set of OpenPGP keys.
*
*/
private static final class NetworkBuilder {
// certificates keyed by fingerprint
private final Map<OpenPgpFingerprint, KeyRingInfo> byFingerprint = new HashMap<>();
// certificates keyed by (sub-) key-id
private final Map<Long, List<KeyRingInfo>> byKeyId = new HashMap<>();
// certificate synopses keyed by fingerprint
private final Map<OpenPgpFingerprint, CertSynopsis> certSynopsisMap = new HashMap<>();
// Issuer -> Targets, edges keyed by issuer
private final Map<OpenPgpFingerprint, List<CertificationSet>> edges = new HashMap<>();
// Target -> Issuers, edges keyed by target
private final Map<OpenPgpFingerprint, List<CertificationSet>> reverseEdges = new HashMap<>();
private final Policy policy;
private final ReferenceTime referenceTime;
private NetworkBuilder(List<KeyRingInfo> validatedCertificates,
Policy policy,
ReferenceTime referenceTime) {
this.policy = policy;
this.referenceTime = referenceTime;
synopsizeCertificates(validatedCertificates);
findEdges(validatedCertificates);
}
private void synopsizeCertificates(List<KeyRingInfo> validatedCertificates) {
for (KeyRingInfo cert : validatedCertificates) {
synopsize(cert);
}
}
private void synopsize(KeyRingInfo cert) {
// index by fingerprint
if (!byFingerprint.containsKey(cert.getFingerprint())) {
byFingerprint.put(cert.getFingerprint(), cert);
}
// index by key-ID
List<KeyRingInfo> certsWithKey = byKeyId.get(cert.getKeyId());
// noinspection Java8MapApi
if (certsWithKey == null) {
certsWithKey = new ArrayList<>();
// TODO: Something is fishy here...
for (PGPPublicKey key : cert.getValidSubkeys()) {
byKeyId.put(key.getKeyID(), certsWithKey);
}
}
certsWithKey.add(cert);
Map<String, RevocationState> userIds = new HashMap<>();
for (String userId : cert.getUserIds()) {
RevocationState state = revocationStateFromSignature(cert.getUserIdRevocation(userId));
userIds.put(userId, state);
}
// index synopses
Date expirationDate;
try {
expirationDate = cert.getExpirationDateForUse(KeyFlag.CERTIFY_OTHER);
} catch (NoSuchElementException e) {
// Some keys are malformed and have no KeyFlags
return;
}
certSynopsisMap.put(cert.getFingerprint(),
new CertSynopsis(cert.getFingerprint(),
expirationDate,
revocationStateFromSignature(cert.getRevocationSelfSignature()),
userIds));
}
private void findEdges(List<KeyRingInfo> validatedCertificates) {
// Identify certifications and delegations
// Target = cert carrying a signature
for (KeyRingInfo validatedTarget : validatedCertificates) {
findEdgesWithTarget(validatedTarget);
}
}
private void findEdgesWithTarget(KeyRingInfo validatedTarget) {
PGPPublicKeyRing validatedTargetKeyRing = KeyRingUtils.publicKeys(validatedTarget.getKeys());
OpenPgpFingerprint targetFingerprint = OpenPgpFingerprint.of(validatedTargetKeyRing);
PGPPublicKey targetPrimaryKey = validatedTargetKeyRing.getPublicKey();
CertSynopsis target = certSynopsisMap.get(targetFingerprint);
// Direct-Key Signatures (delegations) by X on Y
List<PGPSignature> delegations = SignatureUtils.getDelegations(validatedTargetKeyRing);
for (PGPSignature delegation : delegations) {
processDelegation(targetPrimaryKey, target, delegation);
}
// Certification Signatures by X on Y over user-ID U
Iterator<String> userIds = targetPrimaryKey.getUserIDs();
while (userIds.hasNext()) {
String userId = userIds.next();
List<PGPSignature> userIdSigs = SignatureUtils.get3rdPartyCertificationsFor(userId, validatedTargetKeyRing);
processCertification(targetPrimaryKey, target, userId, userIdSigs);
}
}
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);
try {
boolean valid = SignatureVerifier.verifyDirectKeySignature(delegation, issuerSigningKey,
targetPrimaryKey, policy, referenceTime.getTimestamp());
if (valid) {
indexEdge(CertificationFactory.fromDelegation(issuer, target, delegation));
}
} catch (SignatureValidationException e) {
LOGGER.warn("Cannot verify signature by " + issuerFingerprint + " on cert of " + OpenPgpFingerprint.of(targetPrimaryKey), e);
}
}
}
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) {
continue;
}
for (KeyRingInfo candidate : issuerCandidates) {
PGPPublicKeyRing issuerKeyRing = KeyRingUtils.publicKeys(candidate.getKeys());
OpenPgpFingerprint issuerFingerprint = OpenPgpFingerprint.of(issuerKeyRing);
PGPPublicKey issuerSigningKey = issuerKeyRing.getPublicKey(certification.getKeyID());
CertSynopsis issuer = certSynopsisMap.get(issuerFingerprint);
try {
boolean valid = SignatureVerifier.verifySignatureOverUserId(userId, certification,
issuerSigningKey, targetPrimaryKey, policy, referenceTime.getTimestamp());
if (valid) {
indexEdge(CertificationFactory.fromCertification(issuer, target, userId, certification));
}
} catch (SignatureValidationException e) {
LOGGER.warn("Cannot verify signature for '" + userId + "' by " + issuerFingerprint + " on cert of " + target.getFingerprint(), e);
}
}
}
}
private void indexEdge(Certification certification) {
OpenPgpFingerprint issuer = certification.getIssuer().getFingerprint();
OpenPgpFingerprint target = certification.getTarget().getFingerprint();
List<CertificationSet> outEdges = getOrDefault(edges, issuer, ArrayList::new);
indexOutEdge(outEdges, certification);
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;
}
}
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));
}
/**
* Return the constructed, initialized {@link Network}.
*
* @return finished network
*/
public Network buildNetwork() {
return new Network(certSynopsisMap, edges, reverseEdges, referenceTime);
}
}
Network getNetwork() {
return network;
}
// Map signature to its revocation state
private static RevocationState revocationStateFromSignature(PGPSignature revocation) {
if (revocation == null) {
return RevocationState.notRevoked();
}
RevocationReason revocationReason = SignatureSubpacketsUtil.getRevocationReason(revocation);
if (revocationReason == null) {
return RevocationState.hardRevoked();
}
return RevocationAttributes.Reason.isHardRevocation(revocationReason.getRevocationReason()) ?
RevocationState.hardRevoked() : RevocationState.softRevoked(revocation.getCreationTime());
}
// Java 8 is not supported on old Android
private static <K, V> V getOrDefault(Map<K, V> map, K key, Supplier<V> defaultValue) {
V value = map.get(key);
if (value == null) {
value = defaultValue.get();
map.put(key, value);
}
return value;
}
@Override
public String toString() {
return network.toString();
}
}

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// SPDX-FileCopyrightText: 2023 Paul Schaub <vanitasvitae@fsfe.org>
//
// SPDX-License-Identifier: Apache-2.0
/**
* PGPainless API for Web of Trust.
*/
package org.pgpainless.wot;

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// SPDX-FileCopyrightText: 2023 Paul Schaub <vanitasvitae@fsfe.org>
//
// SPDX-License-Identifier: Apache-2.0
package org.pgpainless.wot.sugar;
import java.util.Iterator;
/**
* Because an {@link Iterator} is not {@link Iterable} ¯\_()_/¯.
* @param <T> item
*/
public final class IterableIterator<T> implements Iterable<T> {
private final Iterator<T> iterator;
public IterableIterator(Iterator<T> iterator) {
this.iterator = iterator;
}
@Override
public Iterator<T> iterator() {
return iterator;
}
}

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// SPDX-FileCopyrightText: 2023 Paul Schaub <vanitasvitae@fsfe.org>
//
// SPDX-License-Identifier: Apache-2.0
package org.pgpainless.wot.sugar;
import java.util.Iterator;
/**
* Returns a new {@link Iterator} with a prepended item.
* @param <T> item type
*/
public class PrefixedIterator<T> implements Iterator<T> {
private T prefix;
private Iterator<T> iterator;
public PrefixedIterator(T prefix, Iterator<T> iterator) {
this.prefix = prefix;
this.iterator = iterator;
}
@Override
public boolean hasNext() {
return prefix != null || iterator.hasNext();
}
@Override
public T next() {
if (prefix != null) {
T t = prefix;
prefix = null;
return t;
}
return iterator.next();
}
}

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// SPDX-FileCopyrightText: 2023 Paul Schaub <vanitasvitae@fsfe.org>
//
// SPDX-License-Identifier: Apache-2.0
package org.pgpainless.wot.sugar;
public interface Supplier<T> {
T get();
}

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// SPDX-FileCopyrightText: 2023 Paul Schaub <vanitasvitae@fsfe.org>
//
// SPDX-License-Identifier: Apache-2.0
/**
* Syntactic sugar, backported from Java 8.
*/
package org.pgpainless.wot.sugar;

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// SPDX-FileCopyrightText: 2023 Paul Schaub <vanitasvitae@fsfe.org>
//
// SPDX-License-Identifier: Apache-2.0
package org.pgpainless.wot
import org.bouncycastle.openpgp.PGPPublicKey
import org.bouncycastle.openpgp.PGPSignature
import org.pgpainless.PGPainless
import org.pgpainless.algorithm.KeyFlag
import org.pgpainless.algorithm.RevocationState
import org.pgpainless.exception.SignatureValidationException
import org.pgpainless.key.OpenPgpFingerprint
import org.pgpainless.key.info.KeyRingInfo
import org.pgpainless.key.util.KeyRingUtils
import org.pgpainless.key.util.RevocationAttributes
import org.pgpainless.policy.Policy
import org.pgpainless.signature.SignatureUtils
import org.pgpainless.signature.consumer.SignatureVerifier
import org.pgpainless.signature.subpackets.SignatureSubpacketsUtil
import org.pgpainless.wot.dijkstra.sq.*
import org.pgpainless.wot.dijkstra.sq.CertificationSet.Companion.fromCertification
import org.pgpainless.wot.dijkstra.sq.ReferenceTime.Companion.now
import org.pgpainless.wot.util.CertificationFactory.Companion.fromCertification
import org.pgpainless.wot.util.CertificationFactory.Companion.fromDelegation
import org.slf4j.LoggerFactory
import pgp.cert_d.PGPCertificateDirectory
import pgp.certificate_store.certificate.Certificate
import java.io.IOException
import java.util.*
class WebOfTrust(private val certificateStore: PGPCertificateDirectory) {
lateinit var network: Network
fun initialize() {
var trustRoot: Certificate? = null
try {
trustRoot = certificateStore.trustRootCertificate
} catch (e: NoSuchElementException) {
// ignore
}
val certificates = if (trustRoot == null) {
certificateStore.items().asSequence()
} else {
sequenceOf(trustRoot) + certificateStore.items().asSequence()
}
network = fromCertificates(certificates, PGPainless.getPolicy(), now())
}
companion object {
@JvmStatic
fun fromCertificates(certificates: Sequence<Certificate>,
policy: Policy,
referenceTime: ReferenceTime): Network {
return fromValidCertificates(
parseValidCertificates(certificates, policy, referenceTime),
policy,
referenceTime
)
}
@JvmStatic
fun fromValidCertificates(certificates: List<KeyRingInfo>,
policy: Policy,
referenceTime: ReferenceTime): Network {
val nb = NetworkBuilder(certificates, policy, referenceTime)
return nb.buildNetwork()
}
@JvmStatic
private fun parseValidCertificates(certificates: Sequence<Certificate>,
policy: Policy,
referenceTime: ReferenceTime): List<KeyRingInfo> {
return certificates
.mapNotNull { cert ->
try {
PGPainless.readKeyRing().publicKeyRing(cert.inputStream)
} catch (e: IOException) {
null
}
}
.map { cert ->
KeyRingInfo(cert, policy, referenceTime.timestamp)
}
.toList()
}
// Map signature to its revocation state
@JvmStatic
private fun revocationStateFromSignature(revocation: PGPSignature?): RevocationState {
if (revocation == null) {
return RevocationState.notRevoked()
}
val revocationReason = SignatureSubpacketsUtil.getRevocationReason(revocation)
?: return RevocationState.hardRevoked()
return if (RevocationAttributes.Reason.isHardRevocation(revocationReason.revocationReason))
RevocationState.hardRevoked()
else
RevocationState.softRevoked(revocation.creationTime)
}
/**
* Class for building the [Flow network][Network] from the given set of OpenPGP keys.
*
*/
private class NetworkBuilder constructor(validatedCertificates: List<KeyRingInfo>,
private val policy: Policy,
private val referenceTime: ReferenceTime) {
private val LOGGER = LoggerFactory.getLogger(NetworkBuilder::class.java)
// certificates keyed by fingerprint
private val byFingerprint: MutableMap<OpenPgpFingerprint, KeyRingInfo> = HashMap()
// certificates keyed by (sub-) key-id
private val byKeyId: MutableMap<Long, MutableList<KeyRingInfo>> = HashMap()
// certificate synopses keyed by fingerprint
private val certSynopsisMap: MutableMap<OpenPgpFingerprint, CertSynopsis> = HashMap()
// Issuer -> Targets, edges keyed by issuer
private val edges: MutableMap<OpenPgpFingerprint, MutableList<CertificationSet>> = HashMap()
// Target -> Issuers, edges keyed by target
private val reverseEdges: MutableMap<OpenPgpFingerprint, MutableList<CertificationSet>> = HashMap()
init {
synopsizeCertificates(validatedCertificates)
findEdges(validatedCertificates)
}
private fun synopsizeCertificates(validatedCertificates: List<KeyRingInfo>) {
for (cert in validatedCertificates) {
synopsize(cert)
}
}
private fun synopsize(cert: KeyRingInfo) {
// index by fingerprint
if (!byFingerprint.containsKey(cert.fingerprint)) {
byFingerprint[cert.fingerprint] = cert
}
// index by key-ID
var certsWithKey = byKeyId[cert.keyId]
// noinspection Java8MapApi
if (certsWithKey == null) {
certsWithKey = mutableListOf()
// TODO: Something is fishy here...
for (key in cert.validSubkeys) {
byKeyId[key.keyID] = certsWithKey
}
}
certsWithKey.add(cert)
val userIds: MutableMap<String, RevocationState> = HashMap()
for (userId in cert.userIds) {
val state: RevocationState = revocationStateFromSignature(cert.getUserIdRevocation(userId))
userIds[userId] = state
}
// index synopses
val expirationDate: Date? = try {
cert.getExpirationDateForUse(KeyFlag.CERTIFY_OTHER)
} catch (e: NoSuchElementException) {
// Some keys are malformed and have no KeyFlags
return
}
certSynopsisMap[cert.fingerprint] = CertSynopsis(cert.fingerprint,
expirationDate,
revocationStateFromSignature(cert.revocationSelfSignature),
userIds)
}
private fun findEdges(validatedCertificates: List<KeyRingInfo>) {
// Identify certifications and delegations
// Target = cert carrying a signature
for (validatedTarget in validatedCertificates) {
findEdgesWithTarget(validatedTarget)
}
}
private fun findEdgesWithTarget(validatedTarget: KeyRingInfo) {
val validatedTargetKeyRing = KeyRingUtils.publicKeys(validatedTarget.keys)
val targetFingerprint = OpenPgpFingerprint.of(validatedTargetKeyRing)
val targetPrimaryKey = validatedTargetKeyRing.publicKey!!
val target = certSynopsisMap[targetFingerprint]!!
// Direct-Key Signatures (delegations) by X on Y
val delegations = SignatureUtils.getDelegations(validatedTargetKeyRing)
for (delegation in delegations) {
processDelegation(targetPrimaryKey, target, delegation)
}
// Certification Signatures by X on Y over user-ID U
val userIds = targetPrimaryKey.userIDs
while (userIds.hasNext()) {
val userId = userIds.next()
val userIdSigs = SignatureUtils.get3rdPartyCertificationsFor(userId, validatedTargetKeyRing)
processCertification(targetPrimaryKey, target, userId, userIdSigs)
}
}
private fun processDelegation(targetPrimaryKey: PGPPublicKey,
target: CertSynopsis,
delegation: PGPSignature) {
val issuerCandidates = byKeyId[delegation.keyID]
?: return
for (candidate in issuerCandidates) {
val issuerKeyRing = KeyRingUtils.publicKeys(candidate.keys)
val issuerFingerprint = OpenPgpFingerprint.of(issuerKeyRing)
val issuerSigningKey = issuerKeyRing.getPublicKey(delegation.keyID)
val issuer = certSynopsisMap[issuerFingerprint]
?: continue
try {
val valid = SignatureVerifier.verifyDirectKeySignature(delegation, issuerSigningKey,
targetPrimaryKey, policy, referenceTime.timestamp)
if (valid) {
indexEdge(fromDelegation(issuer, target, delegation))
}
} catch (e: SignatureValidationException) {
val targetFingerprint = OpenPgpFingerprint.of(targetPrimaryKey)
LOGGER.warn("Cannot verify signature by $issuerFingerprint on cert of $targetFingerprint", e)
}
}
}
private fun processCertification(targetPrimaryKey: PGPPublicKey,
target: CertSynopsis,
userId: String,
userIdSigs: List<PGPSignature>) {
for (certification in userIdSigs) {
val issuerCandidates = byKeyId[certification.keyID]
?: continue
for (candidate in issuerCandidates) {
val issuerKeyRing = KeyRingUtils.publicKeys(candidate.keys)
val issuerFingerprint = OpenPgpFingerprint.of(issuerKeyRing)
val issuerSigningKey = issuerKeyRing.getPublicKey(certification.keyID)
?: continue
val issuer = certSynopsisMap[issuerFingerprint]
?: continue
try {
val valid = SignatureVerifier.verifySignatureOverUserId(userId, certification,
issuerSigningKey, targetPrimaryKey, policy, referenceTime.timestamp)
if (valid) {
indexEdge(fromCertification(issuer, target, userId, certification))
}
} catch (e: SignatureValidationException) {
LOGGER.warn("Cannot verify signature for '$userId' by $issuerFingerprint" +
" on cert of ${target.fingerprint}", e)
}
}
}
}
private fun indexEdge(certification: Certification) {
// Index edge as outgoing edge for issuer
val issuer = certification.issuer.fingerprint
edges.getOrPut(issuer) { mutableListOf() }.also { indexOutEdge(it, certification) }
// Index edge as incoming edge for target
val target = certification.target.fingerprint
reverseEdges.getOrPut(target) { mutableListOf() }.also { indexInEdge(it, certification) }
}
private fun indexOutEdge(outEdges: MutableList<CertificationSet>, certification: Certification) {
val target = certification.target.fingerprint
for (outEdge in outEdges) {
if (target == outEdge.target.fingerprint) {
outEdge.add(certification)
return
}
}
outEdges.add(fromCertification(certification))
}
private fun indexInEdge(inEdges: MutableList<CertificationSet>, certification: Certification) {
val issuer = certification.issuer.fingerprint
for (inEdge in inEdges) {
if (issuer == inEdge.issuer.fingerprint) {
inEdge.add(certification)
return
}
}
inEdges.add(fromCertification(certification))
}
/**
* Return the constructed, initialized [Network].
*
* @return finished network
*/
fun buildNetwork(): Network {
return Network(certSynopsisMap, edges, reverseEdges, referenceTime)
}
}
}
}

View file

@ -139,7 +139,7 @@ public class WebOfTrustTest {
}
@Test
public void testWotCreationOfEmptyCertificates() throws BadDataException, IOException {
public void testWotCreationOfEmptyCertificates() {
PGPCertificateDirectory store = TestCertificateStores.emptyGraph();
WebOfTrust wot = new WebOfTrust(store);
wot.initialize();