Kotlin conversion: CertificateAuthenticity
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// SPDX-FileCopyrightText: 2023 Paul Schaub <vanitasvitae@fsfe.org>
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//
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// SPDX-License-Identifier: Apache-2.0
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package org.pgpainless.authentication;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import javax.annotation.Nonnull;
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import org.bouncycastle.openpgp.PGPPublicKeyRing;
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public class CertificateAuthenticity {
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private final String userId;
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private final PGPPublicKeyRing certificate;
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private final Map<CertificationChain, Integer> certificationChains = new HashMap<>();
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private final int targetAmount;
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public CertificateAuthenticity(@Nonnull PGPPublicKeyRing certificate,
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@Nonnull String userId,
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@Nonnull Map<CertificationChain, Integer> certificationChains,
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int targetAmount) {
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this.userId = userId;
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this.certificate = certificate;
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this.certificationChains.putAll(certificationChains);
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this.targetAmount = targetAmount;
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}
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@Nonnull
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public String getUserId() {
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return userId;
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}
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@Nonnull
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public PGPPublicKeyRing getCertificate() {
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return certificate;
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}
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public int getTotalTrustAmount() {
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int total = 0;
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for (int v : certificationChains.values()) {
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total += v;
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}
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return total;
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}
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/**
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* Return the degree of authentication of the binding in percent.
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* 100% means full authentication.
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* Values smaller than 100% mean partial authentication.
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*
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* @return authenticity in percent
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*/
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public int getAuthenticityPercentage() {
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return targetAmount * 100 / getTotalTrustAmount();
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}
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/**
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* Return true, if the binding is authenticated to a sufficient degree.
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*
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* @return true if total gathered evidence outweighs the target trust amount.
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*/
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public boolean isAuthenticated() {
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return targetAmount <= getTotalTrustAmount();
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}
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/**
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* Return a map of {@link CertificationChain CertificationChains} and their respective effective trust amount.
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* The effective trust amount of a path might be smaller than its actual trust amount, for example if nodes of a
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* path are used multiple times.
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*
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* @return map of certification chains and their effective trust amounts
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*/
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@Nonnull
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public Map<CertificationChain, Integer> getCertificationChains() {
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return Collections.unmodifiableMap(certificationChains);
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}
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public static class CertificationChain {
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private final int trustAmount;
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private final List<ChainLink> chainLinks = new ArrayList<>();
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/**
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* A chain of certifications.
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*
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* @param trustAmount actual trust amount of the chain
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* @param chainLinks links of the chain, starting at the trust-root, ending at the target.
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*/
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public CertificationChain(int trustAmount, @Nonnull List<ChainLink> chainLinks) {
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this.trustAmount = trustAmount;
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this.chainLinks.addAll(chainLinks);
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}
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/**
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* Actual trust amount of the certification chain.
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* @return trust amount
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*/
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public int getTrustAmount() {
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return trustAmount;
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}
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/**
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* Return all links in the chain, starting at the trust-root and ending at the target.
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* @return chain links
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*/
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@Nonnull
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public List<ChainLink> getChainLinks() {
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return Collections.unmodifiableList(chainLinks);
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}
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}
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/**
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* A chain link contains a node in the trust chain.
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*/
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public static class ChainLink {
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private final PGPPublicKeyRing certificate;
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/**
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* Create a chain link.
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* @param certificate node in the trust chain
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*/
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public ChainLink(@Nonnull PGPPublicKeyRing certificate) {
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this.certificate = certificate;
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}
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/**
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* Return the certificate that belongs to the node.
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* @return certificate
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*/
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@Nonnull
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public PGPPublicKeyRing getCertificate() {
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return certificate;
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}
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}
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}
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@ -0,0 +1,57 @@
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// SPDX-FileCopyrightText: 2023 Paul Schaub <vanitasvitae@fsfe.org>
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//
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// SPDX-License-Identifier: Apache-2.0
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package org.pgpainless.authentication
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import org.bouncycastle.openpgp.PGPPublicKeyRing
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class CertificateAuthenticity(val userId: String,
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val certificate: PGPPublicKeyRing,
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val certificationChains: Map<CertificationChain, Int>,
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val targetAmount: Int) {
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val totalTrustAmount: Int
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get() = certificationChains.values.sum()
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/**
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* Return the degree of authentication of the binding in percent.
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* 100% means full authentication.
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* Values smaller than 100% mean partial authentication.
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*
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* @return authenticity in percent
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*/
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val authenticityPercentage: Int
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get() = targetAmount * 100 / totalTrustAmount
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/**
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* Return true, if the binding is authenticated to a sufficient degree.
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*
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* @return true if total gathered evidence outweighs the target trust amount.
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*/
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val authenticated: Boolean
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get() = targetAmount <= totalTrustAmount
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fun isAuthenticated() = authenticated
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}
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/**
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* A chain of certifications.
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*
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* @param trustAmount actual trust amount of the chain
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* @param chainLinks links of the chain, starting at the trust-root, ending at the target.
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*/
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class CertificationChain(
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val trustAmount: Int,
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val chainLinks: List<ChainLink>) {
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}
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/**
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* A chain link contains a node in the trust chain.
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*/
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class ChainLink(
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val certificate: PGPPublicKeyRing) {
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}
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