150 lines
4.2 KiB
Java
150 lines
4.2 KiB
Java
// SPDX-FileCopyrightText: 2018 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.key;
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import java.net.URI;
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import java.net.URISyntaxException;
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import java.nio.Buffer;
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import java.nio.ByteBuffer;
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import javax.annotation.Nonnull;
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import org.bouncycastle.openpgp.PGPKeyRing;
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import org.bouncycastle.openpgp.PGPPublicKey;
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import org.bouncycastle.openpgp.PGPPublicKeyRing;
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import org.bouncycastle.openpgp.PGPSecretKey;
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import org.bouncycastle.openpgp.PGPSecretKeyRing;
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import org.bouncycastle.util.encoders.Hex;
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/**
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* This class represents a hex encoded, uppercase OpenPGP v4 fingerprint.
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*/
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public class OpenPgpV4Fingerprint extends OpenPgpFingerprint {
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public static final String SCHEME = "openpgp4fpr";
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/**
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* Create an {@link OpenPgpV4Fingerprint}.
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*
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* @param fingerprint uppercase hexadecimal fingerprint of length 40
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*/
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public OpenPgpV4Fingerprint(@Nonnull String fingerprint) {
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super(fingerprint);
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}
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public OpenPgpV4Fingerprint(@Nonnull byte[] bytes) {
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super(Hex.encode(bytes));
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}
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public OpenPgpV4Fingerprint(@Nonnull PGPPublicKey key) {
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super(key);
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}
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public OpenPgpV4Fingerprint(@Nonnull PGPSecretKey key) {
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this(key.getPublicKey());
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}
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public OpenPgpV4Fingerprint(@Nonnull PGPPublicKeyRing ring) {
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super(ring);
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}
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public OpenPgpV4Fingerprint(@Nonnull PGPSecretKeyRing ring) {
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super(ring);
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}
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public OpenPgpV4Fingerprint(@Nonnull PGPKeyRing ring) {
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super(ring);
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}
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@Override
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public int getVersion() {
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return 4;
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}
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@Override
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protected boolean isValid(@Nonnull String fp) {
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return fp.matches("^[0-9A-F]{40}$");
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}
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@Override
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public long getKeyId() {
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byte[] bytes = Hex.decode(toString().getBytes(utf8));
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ByteBuffer buf = ByteBuffer.wrap(bytes);
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// The key id is the right-most 8 bytes (conveniently a long)
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// We have to cast here in order to be compatible with java 8
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// https://github.com/eclipse/jetty.project/issues/3244
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((Buffer) buf).position(12); // 20 - 8 bytes = offset 12
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return buf.getLong();
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}
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@Override
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public String prettyPrint() {
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String fp = toString();
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StringBuilder pretty = new StringBuilder();
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for (int i = 0; i < 5; i++) {
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pretty.append(fp, i * 4, (i + 1) * 4).append(' ');
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}
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pretty.append(' ');
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for (int i = 5; i < 9; i++) {
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pretty.append(fp, i * 4, (i + 1) * 4).append(' ');
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}
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pretty.append(fp, 36, 40);
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return pretty.toString();
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}
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@Override
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public boolean equals(Object other) {
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if (other == null) {
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return false;
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}
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if (!(other instanceof CharSequence)) {
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return false;
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}
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return this.toString().equals(other.toString());
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}
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@Override
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public int hashCode() {
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return toString().hashCode();
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}
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/**
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* Return the fingerprint as an openpgp4fpr {@link URI}.
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* An example would be 'openpgp4fpr:7F9116FEA90A5983936C7CFAA027DB2F3E1E118A'.
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*
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* @return openpgp4fpr fingerprint uri
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* @see <a href="https://metacode.biz/openpgp/openpgp4fpr">openpgp4fpr URI scheme</a>
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*/
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public URI toUri() {
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try {
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return new URI(OpenPgpV4Fingerprint.SCHEME, toString(), null);
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} catch (URISyntaxException e) {
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throw new AssertionError(e);
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}
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}
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/**
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* Convert an openpgp4fpr URI to an {@link OpenPgpV4Fingerprint}.
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*
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* @param uri {@link URI} with scheme 'openpgp4fpr'
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* @return fingerprint parsed from the uri
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* @see <a href="https://metacode.biz/openpgp/openpgp4fpr">openpgp4fpr URI scheme</a>
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*/
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public static OpenPgpV4Fingerprint fromUri(URI uri) {
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if (!SCHEME.equals(uri.getScheme())) {
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throw new IllegalArgumentException("URI scheme MUST equal '" + SCHEME + "'");
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}
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return new OpenPgpV4Fingerprint(uri.getSchemeSpecificPart());
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}
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@Override
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public int compareTo(@Nonnull OpenPgpFingerprint openPgpFingerprint) {
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return toString().compareTo(openPgpFingerprint.toString());
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}
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}
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