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More refactoring for WebOfTrust
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2e802c1f1e
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50810e1d14
GPG key ID:
62BEE9264BF17311
1 changed files with 147 additions and 152 deletions
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@ -73,6 +73,153 @@ class WebOfTrust(private val certificateStore: PGPCertificateStore) {
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private class PGPNetworkFactory private constructor(validatedCertificates: List<KeyRingInfo>,
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private val policy: Policy,
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private val referenceTime: ReferenceTime) {
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private val networkBuilder: Network.Builder = Network.builder()
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// certificates keyed by fingerprint
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private val byFingerprint: MutableMap<Fingerprint, KeyRingInfo> = HashMap()
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// certificates keyed by (sub-) key-id
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private val byKeyId: MutableMap<Long, MutableList<KeyRingInfo>> = HashMap()
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// nodes keyed by fingerprint
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private val nodeMap: MutableMap<Fingerprint, CertSynopsis> = HashMap()
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init {
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validatedCertificates.forEach { indexAsNode(it) }
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validatedCertificates.forEach { findEdgesWithTarget(it) }
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}
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private fun indexAsNode(cert: KeyRingInfo) {
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// certificate expiration date
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val expirationDate: Date? = try {
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cert.getExpirationDateForUse(KeyFlag.CERTIFY_OTHER)
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} catch (e: NoSuchElementException) {
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// Some keys are malformed and have no KeyFlags
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return
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}
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// index by fingerprint
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val certFingerprint = Fingerprint(cert.fingerprint)
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byFingerprint.putIfAbsent(certFingerprint, cert)
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// index by key-ID
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cert.validSubkeys.forEach {
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byKeyId.getOrPut(it.keyID) { mutableListOf() }.add(cert)
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}
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// map user-ids to revocation states
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val userIds = buildMap<String, RevocationState> {
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cert.userIds.forEach {
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put(it, RevocationState(cert.getUserIdRevocation(it)))
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}
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}
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val node = CertSynopsis(certFingerprint,
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expirationDate,
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RevocationState(cert.revocationSelfSignature),
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userIds)
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nodeMap[certFingerprint] = node
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networkBuilder.addNode(node)
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}
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private fun findEdgesWithTarget(validatedTarget: KeyRingInfo) {
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val validatedTargetKeyRing = KeyRingUtils.publicKeys(validatedTarget.keys)
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val targetFingerprint = Fingerprint(OpenPgpFingerprint.of(validatedTargetKeyRing))
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val targetPrimaryKey = validatedTargetKeyRing.publicKey!!
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val target = nodeMap[targetFingerprint]!!
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// Direct-Key Signatures (delegations) by X on Y
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val delegations = SignatureUtils.getDelegations(validatedTargetKeyRing)
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for (delegation in delegations) {
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processDelegation(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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val userIds = targetPrimaryKey.userIDs
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while (userIds.hasNext()) {
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val userId = userIds.next()
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val userIdSigs = SignatureUtils.get3rdPartyCertificationsFor(userId, validatedTargetKeyRing)
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userIdSigs.forEach {
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processCertificationOnUserId(targetPrimaryKey, target, userId, it)
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}
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}
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}
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private fun processDelegation(targetPrimaryKey: PGPPublicKey,
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target: CertSynopsis,
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delegation: PGPSignature) {
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// There might be more than one cert with a subkey of matching key-id
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val issuerCandidates = byKeyId[delegation.keyID]
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?: return // missing issuer cert
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for (candidate in issuerCandidates) {
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val issuerKeyRing = KeyRingUtils.publicKeys(candidate.keys)
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val issuerFingerprint = Fingerprint(OpenPgpFingerprint.of(issuerKeyRing))
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val issuerSigningKey = issuerKeyRing.getPublicKey(delegation.keyID)!!
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val issuer = nodeMap[issuerFingerprint]!!
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try {
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val valid = SignatureVerifier.verifyDirectKeySignature(delegation, issuerSigningKey,
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targetPrimaryKey, policy, referenceTime.timestamp)
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if (valid) {
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networkBuilder.addEdge(fromDelegation(issuer, target, delegation))
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return // we're done
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}
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} catch (e: SignatureValidationException) {
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val targetFingerprint = OpenPgpFingerprint.of(targetPrimaryKey)
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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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private fun processCertificationOnUserId(targetPrimaryKey: PGPPublicKey,
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target: CertSynopsis,
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userId: String,
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certification: PGPSignature) {
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// There might be more than one cert with a subkey of matching key-id
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val issuerCandidates = byKeyId[certification.keyID]
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?: return // missing issuer cert
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for (candidate in issuerCandidates) {
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val issuerKeyRing = KeyRingUtils.publicKeys(candidate.keys)
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val issuerFingerprint = Fingerprint(OpenPgpFingerprint.of(issuerKeyRing))
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val issuerSigningKey = issuerKeyRing.getPublicKey(certification.keyID)!!
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val issuer = nodeMap[issuerFingerprint]!!
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try {
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val valid = SignatureVerifier.verifySignatureOverUserId(userId, certification,
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issuerSigningKey, targetPrimaryKey, policy, referenceTime.timestamp)
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if (valid) {
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networkBuilder.addEdge(fromCertification(issuer, target, userId, certification))
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return // we're done
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}
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} catch (e: SignatureValidationException) {
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LOGGER.warn("Cannot verify signature for '$userId' by $issuerFingerprint" +
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" on cert of ${target.fingerprint}", e)
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}
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}
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}
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private fun Fingerprint(fingerprint: OpenPgpFingerprint) = Fingerprint(fingerprint.toString())
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private fun RevocationState(revocation: PGPSignature?): RevocationState {
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if (revocation == null) {
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return RevocationState.notRevoked()
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}
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val revocationReason = SignatureSubpacketsUtil.getRevocationReason(revocation)
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?: return RevocationState.hardRevoked()
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return if (RevocationAttributes.Reason.isHardRevocation(revocationReason.revocationReason))
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RevocationState.hardRevoked()
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else
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RevocationState.softRevoked(revocation.creationTime)
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}
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/**
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* Return the constructed, initialized [Network].
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*
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* @return finished network
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*/
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fun buildNetwork(): Network {
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return networkBuilder.build()
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}
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companion object {
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@JvmStatic
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@ -109,157 +256,5 @@ class WebOfTrust(private val certificateStore: PGPCertificateStore) {
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}
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}
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private val networkBuilder: Network.Builder = Network.builder()
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// certificates keyed by fingerprint
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private val byFingerprint: MutableMap<Fingerprint, KeyRingInfo> = HashMap()
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// certificates keyed by (sub-) key-id
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private val byKeyId: MutableMap<Long, MutableList<KeyRingInfo>> = HashMap()
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// certificate synopses keyed by fingerprint
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private val certSynopsisMap: MutableMap<Fingerprint, CertSynopsis> = HashMap()
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init {
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validatedCertificates.forEach { indexAsNode(it) }
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validatedCertificates.forEach { findEdgesWithTarget(it) }
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}
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private fun indexAsNode(cert: KeyRingInfo) {
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// index by fingerprint
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val certFingerprint = Fingerprint(cert.fingerprint)
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if (!byFingerprint.containsKey(certFingerprint)) {
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byFingerprint[certFingerprint] = cert
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}
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// index by key-ID
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var certsWithKey = byKeyId[cert.keyId]
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// noinspection Java8MapApi
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if (certsWithKey == null) {
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certsWithKey = mutableListOf()
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// TODO: Something is fishy here...
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for (key in cert.validSubkeys) {
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byKeyId[key.keyID] = certsWithKey
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}
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}
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certsWithKey.add(cert)
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val userIds: MutableMap<String, RevocationState> = HashMap()
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for (userId in cert.userIds) {
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val state = RevocationState(cert.getUserIdRevocation(userId))
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userIds[userId] = state
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}
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// index synopses
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val expirationDate: Date? = try {
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cert.getExpirationDateForUse(KeyFlag.CERTIFY_OTHER)
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} catch (e: NoSuchElementException) {
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// Some keys are malformed and have no KeyFlags
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return
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}
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val node = CertSynopsis(certFingerprint,
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expirationDate,
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RevocationState(cert.revocationSelfSignature),
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userIds)
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certSynopsisMap[certFingerprint] = node
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networkBuilder.addNode(node)
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}
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private fun findEdgesWithTarget(validatedTarget: KeyRingInfo) {
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val validatedTargetKeyRing = KeyRingUtils.publicKeys(validatedTarget.keys)
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val targetFingerprint = Fingerprint(OpenPgpFingerprint.of(validatedTargetKeyRing))
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val targetPrimaryKey = validatedTargetKeyRing.publicKey!!
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val target = certSynopsisMap[targetFingerprint]!!
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// Direct-Key Signatures (delegations) by X on Y
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val delegations = SignatureUtils.getDelegations(validatedTargetKeyRing)
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for (delegation in delegations) {
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processDelegation(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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val userIds = targetPrimaryKey.userIDs
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while (userIds.hasNext()) {
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val userId = userIds.next()
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val userIdSigs = SignatureUtils.get3rdPartyCertificationsFor(userId, validatedTargetKeyRing)
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userIdSigs.forEach {
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processCertificationOnUserId(targetPrimaryKey, target, userId, it)
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}
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}
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}
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private fun processDelegation(targetPrimaryKey: PGPPublicKey,
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target: CertSynopsis,
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delegation: PGPSignature) {
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val issuerCandidates = byKeyId[delegation.keyID]
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?: return
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for (candidate in issuerCandidates) {
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val issuerKeyRing = KeyRingUtils.publicKeys(candidate.keys)
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val issuerFingerprint = Fingerprint(OpenPgpFingerprint.of(issuerKeyRing))
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val issuerSigningKey = issuerKeyRing.getPublicKey(delegation.keyID)
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val issuer = certSynopsisMap[issuerFingerprint]
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?: continue
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try {
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val valid = SignatureVerifier.verifyDirectKeySignature(delegation, issuerSigningKey,
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targetPrimaryKey, policy, referenceTime.timestamp)
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if (valid) {
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networkBuilder.addEdge(fromDelegation(issuer, target, delegation))
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}
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} catch (e: SignatureValidationException) {
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val targetFingerprint = OpenPgpFingerprint.of(targetPrimaryKey)
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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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private fun processCertificationOnUserId(targetPrimaryKey: PGPPublicKey,
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target: CertSynopsis,
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userId: String,
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certification: PGPSignature) {
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val issuerCandidates = byKeyId[certification.keyID]
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?: return
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for (candidate in issuerCandidates) {
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val issuerKeyRing = KeyRingUtils.publicKeys(candidate.keys)
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val issuerFingerprint = Fingerprint(OpenPgpFingerprint.of(issuerKeyRing))
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val issuerSigningKey = issuerKeyRing.getPublicKey(certification.keyID)
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?: continue
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val issuer = certSynopsisMap[issuerFingerprint]
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?: continue
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try {
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val valid = SignatureVerifier.verifySignatureOverUserId(userId, certification,
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issuerSigningKey, targetPrimaryKey, policy, referenceTime.timestamp)
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if (valid) {
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networkBuilder.addEdge(fromCertification(issuer, target, userId, certification))
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}
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} catch (e: SignatureValidationException) {
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LOGGER.warn("Cannot verify signature for '$userId' by $issuerFingerprint" +
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" on cert of ${target.fingerprint}", e)
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}
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}
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}
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private fun Fingerprint(fingerprint: OpenPgpFingerprint) = Fingerprint(fingerprint.toString())
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private fun RevocationState(revocation: PGPSignature?): RevocationState {
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if (revocation == null) {
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return RevocationState.notRevoked()
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}
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val revocationReason = SignatureSubpacketsUtil.getRevocationReason(revocation)
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?: return RevocationState.hardRevoked()
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return if (RevocationAttributes.Reason.isHardRevocation(revocationReason.revocationReason))
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RevocationState.hardRevoked()
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else
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RevocationState.softRevoked(revocation.creationTime)
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}
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/**
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* Return the constructed, initialized [Network].
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*
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* @return finished network
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*/
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fun buildNetwork(): Network {
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return networkBuilder.build()
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}
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}
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}
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