mirror of
https://github.com/pgpainless/pgpainless.git
synced 2024-06-25 04:54:49 +02:00
Refactoring in an attempt to both understand the code and make it more readable
This commit is contained in:
parent
2b12e4fdb7
commit
4b81ee7307
GPG key ID:
62BEE9264BF17311
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@ -6,11 +6,13 @@ package org.pgpainless.wot;
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import java.io.IOException;
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import java.util.ArrayList;
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import java.util.Date;
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import java.util.HashMap;
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import java.util.HashSet;
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import java.util.Iterator;
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import java.util.List;
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import java.util.Map;
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import java.util.function.Supplier;
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import org.bouncycastle.bcpg.sig.RevocationReason;
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import org.bouncycastle.openpgp.PGPPublicKey;
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@ -74,7 +76,16 @@ public class WebOfTrust implements CertificateAuthority {
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Optional<ReferenceTime> optReferenceTime) {
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ReferenceTime referenceTime = optReferenceTime.isPresent() ? optReferenceTime.get() : ReferenceTime.now();
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Iterable<KeyRingInfo> validCerts = parseValidCertificates(certificates, policy, referenceTime.getTimestamp());
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return fromValidCertificates(
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validCerts,
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policy,
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referenceTime
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);
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}
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private static Iterable<KeyRingInfo> parseValidCertificates(Iterable<Certificate> certificates, Policy policy, Date referenceTime) {
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// Parse all certificates
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List<KeyRingInfo> validCerts = new ArrayList<>();
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for (Certificate cert : certificates) {
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@ -85,7 +96,7 @@ public class WebOfTrust implements CertificateAuthority {
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throw new IOException("Certificate " + cert.getFingerprint() + " was null. No certificate data?");
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}
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KeyRingInfo info = new KeyRingInfo(publicKey, policy, referenceTime.getTimestamp());
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KeyRingInfo info = new KeyRingInfo(publicKey, policy, referenceTime);
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if (info.getValidUserIds().isEmpty()) {
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LOGGER.warn("Certificate " + cert.getFingerprint() + " has no valid user-ids. Ignore.");
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// Ignore invalid cert
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@ -97,12 +108,7 @@ public class WebOfTrust implements CertificateAuthority {
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LOGGER.warn("Could not parse certificate " + cert.getFingerprint(), e);
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}
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}
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return fromValidCertificates(
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validCerts,
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policy,
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referenceTime
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);
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return validCerts;
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}
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/**
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@ -116,28 +122,68 @@ public class WebOfTrust implements CertificateAuthority {
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Iterable<KeyRingInfo> validatedCertificates,
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Policy policy,
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ReferenceTime referenceTime) {
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NetworkBuilder nb = new NetworkBuilder(validatedCertificates, policy, referenceTime);
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return nb.buildNetwork();
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}
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Map<OpenPgpFingerprint, KeyRingInfo> byFingerprint = new HashMap<>();
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Map<Long, List<KeyRingInfo>> byKeyId = new HashMap<>();
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private static class NetworkBuilder {
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Map<OpenPgpFingerprint, CertSynopsis> certSynopsisMap = new HashMap<>();
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// Index structures
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private final Map<OpenPgpFingerprint, KeyRingInfo> byFingerprint = new HashMap<>();
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private final Map<Long, List<KeyRingInfo>> byKeyId = new HashMap<>();
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private final Map<OpenPgpFingerprint, CertSynopsis> certSynopsisMap = new HashMap<>();
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for (KeyRingInfo cert : validatedCertificates) {
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// noinspection Java8MapApi
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if (byFingerprint.get(cert.getFingerprint()) == null) {
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// Issuer -> Target, Signatures by an issuer
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private final Map<OpenPgpFingerprint, List<CertificationSet>> edges = new HashMap<>();
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// Target -> Issuer, Signatures on the target
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private final Map<OpenPgpFingerprint, List<CertificationSet>> reverseEdges = new HashMap<>();
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// TODO: Get rid of this
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Map<OpenPgpFingerprint, Map<OpenPgpFingerprint, List<Certification>>> certifications = new HashMap<>();
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private final Iterable<KeyRingInfo> validatedCertificates;
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private final Policy policy;
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private final ReferenceTime referenceTime;
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private NetworkBuilder(Iterable<KeyRingInfo> validatedCertificates,
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Policy policy,
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ReferenceTime referenceTime) {
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this.validatedCertificates = validatedCertificates;
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this.policy = policy;
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this.referenceTime = referenceTime;
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synopsizeCertificates();
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processSignaturesOnCertificates();
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identifyEdges();
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}
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private void synopsizeCertificates() {
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for (KeyRingInfo cert : validatedCertificates) {
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synopsize(cert);
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}
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}
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private void synopsize(KeyRingInfo cert) {
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// index by fingerprint
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if (!byFingerprint.containsKey(cert.getFingerprint())) {
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byFingerprint.put(cert.getFingerprint(), cert);
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}
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List<KeyRingInfo> byKeyIdEntry = byKeyId.get(cert.getKeyId());
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// index by key-ID
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List<KeyRingInfo> certsWithKey = byKeyId.get(cert.getKeyId());
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// noinspection Java8MapApi
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if (byKeyIdEntry == null) {
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byKeyIdEntry = new ArrayList<>();
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if (certsWithKey == null) {
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certsWithKey = new ArrayList<>();
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// TODO: Something is fishy here...
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for (PGPPublicKey key : cert.getValidSubkeys()) {
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byKeyId.put(key.getKeyID(), byKeyIdEntry);
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byKeyId.put(key.getKeyID(), certsWithKey);
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}
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}
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byKeyIdEntry.add(cert);
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certsWithKey.add(cert);
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// index synopses
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certSynopsisMap.put(cert.getFingerprint(),
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new CertSynopsis(cert.getFingerprint(),
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cert.getExpirationDateForUse(KeyFlag.CERTIFY_OTHER),
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@ -145,18 +191,65 @@ public class WebOfTrust implements CertificateAuthority {
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new HashSet<>(cert.getValidUserIds())));
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}
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Map<OpenPgpFingerprint, Map<OpenPgpFingerprint, List<Certification>>> certifications = new HashMap<>();
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private void processSignaturesOnCertificates() {
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// Identify certifications and delegations
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// Target = cert carrying a signature
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for (KeyRingInfo validatedTarget : validatedCertificates) {
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processSigsOnCert(validatedTarget);
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}
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}
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for (KeyRingInfo validatedTarget : validatedCertificates) {
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PGPPublicKeyRing validatedKeyRing = KeyRingUtils.publicKeys(validatedTarget.getKeys());
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OpenPgpFingerprint targetFingerprint = OpenPgpFingerprint.of(validatedKeyRing);
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PGPPublicKey validatedPrimaryKey = validatedKeyRing.getPublicKey();
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private void processSigsOnCert(KeyRingInfo validatedTarget) {
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PGPPublicKeyRing validatedTargetKeyRing = KeyRingUtils.publicKeys(validatedTarget.getKeys());
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OpenPgpFingerprint targetFingerprint = OpenPgpFingerprint.of(validatedTargetKeyRing);
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PGPPublicKey targetPrimaryKey = validatedTargetKeyRing.getPublicKey();
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CertSynopsis target = certSynopsisMap.get(targetFingerprint);
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// Direct-Key Signatures by X on Y
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List<PGPSignature> delegations = SignatureUtils.getDelegations(validatedKeyRing);
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// Direct-Key Signatures (delegations) by X on Y
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List<PGPSignature> delegations = SignatureUtils.getDelegations(validatedTargetKeyRing);
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for (PGPSignature delegation : delegations) {
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List<KeyRingInfo> issuerCandidates = byKeyId.get(delegation.getKeyID());
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indexAndVerifyDelegation(targetPrimaryKey, target, delegation);
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}
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// Certification Signatures by X on Y over user-ID U
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Iterator<String> userIds = targetPrimaryKey.getUserIDs();
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while (userIds.hasNext()) {
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String userId = userIds.next();
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List<PGPSignature> userIdSigs = SignatureUtils.get3rdPartyCertificationsFor(userId, validatedTargetKeyRing);
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indexAndVerifyCertifications(targetPrimaryKey, target, userId, userIdSigs);
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}
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}
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private void indexAndVerifyDelegation(PGPPublicKey targetPrimaryKey, CertSynopsis target, PGPSignature delegation) {
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List<KeyRingInfo> issuerCandidates = byKeyId.get(delegation.getKeyID());
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if (issuerCandidates == null) {
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return;
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}
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for (KeyRingInfo candidate : issuerCandidates) {
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PGPPublicKeyRing issuerKeyRing = KeyRingUtils.publicKeys(candidate.getKeys());
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OpenPgpFingerprint issuerFingerprint = OpenPgpFingerprint.of(issuerKeyRing);
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PGPPublicKey issuerSigningKey = issuerKeyRing.getPublicKey(delegation.getKeyID());
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CertSynopsis issuer = certSynopsisMap.get(issuerFingerprint);
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boolean valid = false;
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try {
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valid = SignatureVerifier.verifyDirectKeySignature(delegation, issuerSigningKey, targetPrimaryKey, policy, referenceTime.getTimestamp());
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} catch (SignatureValidationException e) {
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LOGGER.warn("Cannot verify signature by " + issuerFingerprint + " on cert of " + OpenPgpFingerprint.of(targetPrimaryKey), e);
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}
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if (valid) {
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Map<OpenPgpFingerprint, List<Certification>> sigsBy = getOrDefault(certifications, issuerFingerprint, HashMap::new);
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List<Certification> targetSigs = getOrDefault(sigsBy, target.getFingerprint(), ArrayList::new);
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targetSigs.add(new Certification(issuer, Optional.empty(), target, delegation));
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}
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}
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}
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private void indexAndVerifyCertifications(PGPPublicKey targetPrimaryKey, CertSynopsis target, String userId, List<PGPSignature> userIdSigs) {
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for (PGPSignature certification : userIdSigs) {
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List<KeyRingInfo> issuerCandidates = byKeyId.get(certification.getKeyID());
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if (issuerCandidates == null) {
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continue;
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}
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@ -164,110 +257,51 @@ public class WebOfTrust implements CertificateAuthority {
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for (KeyRingInfo candidate : issuerCandidates) {
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PGPPublicKeyRing issuerKeyRing = KeyRingUtils.publicKeys(candidate.getKeys());
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OpenPgpFingerprint issuerFingerprint = OpenPgpFingerprint.of(issuerKeyRing);
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PGPPublicKey issuerSigningKey = issuerKeyRing.getPublicKey(delegation.getKeyID());
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PGPPublicKey issuerSigningKey = issuerKeyRing.getPublicKey(certification.getKeyID());
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CertSynopsis issuer = certSynopsisMap.get(issuerFingerprint);
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try {
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System.out.println("Sig from " + issuerFingerprint + " on " + targetFingerprint);
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boolean valid = SignatureVerifier.verifyDirectKeySignature(delegation, issuerSigningKey, validatedPrimaryKey, policy, referenceTime.getTimestamp());
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boolean valid = SignatureVerifier.verifySignatureOverUserId(userId, certification, issuerSigningKey, targetPrimaryKey, policy, referenceTime.getTimestamp());
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if (valid) {
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Map<OpenPgpFingerprint, List<Certification>> sigsBy = certifications.get(issuerFingerprint);
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if (sigsBy == null) {
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sigsBy = new HashMap<>();
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certifications.put(issuerFingerprint, sigsBy);
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}
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List<Certification> targetSigs = sigsBy.get(targetFingerprint);
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if (targetSigs == null) {
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targetSigs = new ArrayList<>();
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sigsBy.put(targetFingerprint, targetSigs);
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}
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targetSigs.add(new Certification(issuer, Optional.empty(), target, delegation));
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Map<OpenPgpFingerprint, List<Certification>> sigsBy = getOrDefault(certifications, issuerFingerprint, HashMap::new);
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List<Certification> targetSigs = getOrDefault(sigsBy, target.getFingerprint(), ArrayList::new);
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targetSigs.add(new Certification(issuer, Optional.just(userId), target, certification));
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}
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} catch (SignatureValidationException e) {
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LOGGER.warn("Cannot verify signature by " + issuerFingerprint + " on cert of " + targetFingerprint, e);
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}
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}
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}
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Iterator<String> userIds = validatedPrimaryKey.getUserIDs();
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while (userIds.hasNext()) {
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String userId = userIds.next();
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List<PGPSignature> userIdSigs = SignatureUtils.get3rdPartyCertificationsFor(userId, validatedKeyRing);
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for (PGPSignature certification : userIdSigs) {
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List<KeyRingInfo> issuerCandidates = byKeyId.get(certification.getKeyID());
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if (issuerCandidates == null) {
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continue;
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}
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for (KeyRingInfo candidate : issuerCandidates) {
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PGPPublicKeyRing issuerKeyRing = KeyRingUtils.publicKeys(candidate.getKeys());
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OpenPgpFingerprint issuerFingerprint = OpenPgpFingerprint.of(issuerKeyRing);
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PGPPublicKey issuerSigningKey = issuerKeyRing.getPublicKey(certification.getKeyID());
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CertSynopsis issuer = certSynopsisMap.get(issuerFingerprint);
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try {
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System.out.println("Sig from " + issuerFingerprint + " for " + userId + " on " + targetFingerprint);
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boolean valid = SignatureVerifier.verifySignatureOverUserId(userId, certification, issuerSigningKey, validatedPrimaryKey, policy, referenceTime.getTimestamp());
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if (valid) {
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Map<OpenPgpFingerprint, List<Certification>> sigsBy = certifications.get(issuerFingerprint);
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if (sigsBy == null) {
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sigsBy = new HashMap<>();
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certifications.put(issuerFingerprint, sigsBy);
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}
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List<Certification> targetSigs = sigsBy.get(targetFingerprint);
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if (targetSigs == null) {
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targetSigs = new ArrayList<>();
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sigsBy.put(targetFingerprint, targetSigs);
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}
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targetSigs.add(new Certification(issuer, Optional.just(userId), target, certification));
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}
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} catch (SignatureValidationException e) {
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LOGGER.warn("Cannot verify signature for '" + userId + "' by " + issuerFingerprint + " on cert of " + targetFingerprint, e);
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}
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LOGGER.warn("Cannot verify signature for '" + userId + "' by " + issuerFingerprint + " on cert of " + target.getFingerprint(), e);
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}
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}
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}
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}
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// Re-order data structure
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private void identifyEdges() {
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// Re-order data structure
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for (OpenPgpFingerprint issuerFp : certifications.keySet()) {
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Map<OpenPgpFingerprint, List<Certification>> issuedBy = certifications.get(issuerFp);
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// Issuer -> Target, Signatures by an issuer
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Map<OpenPgpFingerprint, List<CertificationSet>> edges = new HashMap<>();
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// Target -> Issuer, Signatures on the target
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Map<OpenPgpFingerprint, List<CertificationSet>> reverseEdges = new HashMap<>();
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// one issuer can issue many edges
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List<CertificationSet> outEdges = new ArrayList<>();
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for (OpenPgpFingerprint targetFp : issuedBy.keySet()) {
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// for each issuer
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for (OpenPgpFingerprint issuerFp : certifications.keySet()) {
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Map<OpenPgpFingerprint, List<Certification>> issuedBy = certifications.get(issuerFp);
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List<Certification> onCert = issuedBy.get(targetFp);
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CertificationSet edgeSigs = CertificationSet.empty(certSynopsisMap.get(issuerFp), certSynopsisMap.get(targetFp));
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for (Certification certification : onCert) {
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edgeSigs.add(certification);
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}
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outEdges.add(edgeSigs);
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List<CertificationSet> reverseEdge = getOrDefault(reverseEdges, targetFp, ArrayList::new);
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reverseEdge.add(edgeSigs);
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List<CertificationSet> edge = new ArrayList<>();
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// for each target
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for (OpenPgpFingerprint targetFp : issuedBy.keySet()) {
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List<Certification> onCert = issuedBy.get(targetFp);
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CertificationSet edgeSigs = CertificationSet.empty(certSynopsisMap.get(issuerFp), certSynopsisMap.get(targetFp));
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for (Certification certification : onCert) {
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edgeSigs.add(certification);
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}
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edge.add(edgeSigs);
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List<CertificationSet> reverseEdge = reverseEdges.get(targetFp);
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if (reverseEdge == null) {
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reverseEdge = new ArrayList<>();
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reverseEdges.put(targetFp, reverseEdge);
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}
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reverseEdge.add(edgeSigs);
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edges.put(issuerFp, outEdges);
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}
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edges.put(issuerFp, edge);
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}
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return new Network(certSynopsisMap, edges, reverseEdges, referenceTime);
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public Network buildNetwork() {
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return new Network(certSynopsisMap, edges, reverseEdges, referenceTime);
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}
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}
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private static RevocationState revocationStateFromSignature(PGPSignature revocation) {
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@ -284,6 +318,15 @@ public class WebOfTrust implements CertificateAuthority {
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RevocationState.hardRevoked() : RevocationState.softRevoked(revocation.getCreationTime());
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}
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private static <K, V> V getOrDefault(Map<K, V> map, K key, Supplier<V> defaultValue) {
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V value = map.get(key);
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if (value == null) {
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value = defaultValue.get();
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map.put(key, value);
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}
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return value;
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}
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@Override
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public boolean isAuthorized(PGPPublicKeyRing certificate, String userId) {
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return false;
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@ -13,6 +13,11 @@ import org.bouncycastle.openpgp.PGPSignature;
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import javax.annotation.Nonnull;
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/**
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* A {@link CertificationSet} is a set of {@link Certification Certifications} made by the same issuer, on the same
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* target certificate.
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* In some sense, a {@link CertificationSet} can be considered an edge in the web of trust.
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*/
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public final class CertificationSet {
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private final CertSynopsis issuer;
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