133 lines
4.2 KiB
Java
133 lines
4.2 KiB
Java
/*
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* Copyright (C) 2017 Schürmann & Breitmoser GbR
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package org.sufficientlysecure.keychain.pgp;
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import java.io.ByteArrayOutputStream;
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import java.io.IOException;
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import java.io.ObjectOutputStream;
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import java.io.Serializable;
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import java.security.MessageDigest;
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import java.security.NoSuchAlgorithmException;
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import org.bouncycastle.util.encoders.Base64;
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public abstract class SecurityProblem implements Serializable {
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public String getIdentifier() {
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if (!isIdentifiable()) {
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return null;
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}
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try {
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ByteArrayOutputStream out = new ByteArrayOutputStream();
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ObjectOutputStream oos = new ObjectOutputStream(out);
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oos.writeObject(this);
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oos.close();
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byte[] digest = MessageDigest.getInstance("SHA1").digest(out.toByteArray());
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return Base64.toBase64String(digest);
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} catch (NoSuchAlgorithmException | IOException e) {
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throw new IllegalStateException(e);
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}
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}
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public boolean isIdentifiable() {
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return false;
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}
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public static abstract class KeySecurityProblem extends SecurityProblem {
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public final long masterKeyId;
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public final long subKeyId;
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public final int algorithm;
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private KeySecurityProblem(long masterKeyId, long subKeyId, int algorithm) {
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this.masterKeyId = masterKeyId;
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this.subKeyId = subKeyId;
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this.algorithm = algorithm;
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}
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@Override
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public boolean isIdentifiable() {
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return true;
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}
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}
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public static abstract class EncryptionAlgorithmProblem extends SecurityProblem {
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@SuppressWarnings("unused") // used for identifying this specific problem
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private final byte[] sessionKey;
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private EncryptionAlgorithmProblem(byte[] sessionKey) {
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this.sessionKey = sessionKey;
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}
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@Override
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public boolean isIdentifiable() {
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return sessionKey != null;
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}
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}
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public static class InsecureBitStrength extends KeySecurityProblem {
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public final int bitStrength;
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InsecureBitStrength(long masterKeyId, long subKeyId, int algorithm, int bitStrength) {
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super(masterKeyId, subKeyId, algorithm);
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this.bitStrength = bitStrength;
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}
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}
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public static class NotSecureCurve extends KeySecurityProblem {
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public final String curveOid;
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NotSecureCurve(long masterKeyId, long subKeyId, String curveOid, int algorithm) {
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super(masterKeyId, subKeyId, algorithm);
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this.curveOid = curveOid;
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}
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}
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public static class UnidentifiedKeyProblem extends KeySecurityProblem {
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UnidentifiedKeyProblem(long masterKeyId, long subKeyId, int algorithm) {
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super(masterKeyId, subKeyId, algorithm);
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}
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}
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public static class InsecureSigningAlgorithm extends SecurityProblem {
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public final int hashAlgorithm;
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InsecureSigningAlgorithm(int hashAlgorithm) {
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this.hashAlgorithm = hashAlgorithm;
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}
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}
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public static class InsecureEncryptionAlgorithm extends EncryptionAlgorithmProblem {
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public final int symmetricAlgorithm;
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InsecureEncryptionAlgorithm(byte[] sessionKey, int symmetricAlgorithm) {
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super(sessionKey);
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this.symmetricAlgorithm = symmetricAlgorithm;
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}
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}
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public static class MissingMdc extends EncryptionAlgorithmProblem {
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MissingMdc(byte[] sessionKey) {
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super(sessionKey);
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}
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}
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}
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