187 lines
5.6 KiB
Java
187 lines
5.6 KiB
Java
// SPDX-FileCopyrightText: 2018 Paul Schaub <vanitasvitae@fsfe.org>
|
|
//
|
|
// SPDX-License-Identifier: Apache-2.0
|
|
|
|
package org.pgpainless.key;
|
|
|
|
import java.net.URI;
|
|
import java.net.URISyntaxException;
|
|
import java.nio.Buffer;
|
|
import java.nio.ByteBuffer;
|
|
import java.nio.charset.Charset;
|
|
import javax.annotation.Nonnull;
|
|
|
|
import org.bouncycastle.openpgp.PGPKeyRing;
|
|
import org.bouncycastle.openpgp.PGPPublicKey;
|
|
import org.bouncycastle.openpgp.PGPPublicKeyRing;
|
|
import org.bouncycastle.openpgp.PGPSecretKey;
|
|
import org.bouncycastle.openpgp.PGPSecretKeyRing;
|
|
import org.bouncycastle.util.encoders.Hex;
|
|
|
|
/**
|
|
* This class represents an hex encoded, uppercase OpenPGP v4 fingerprint.
|
|
*/
|
|
public class OpenPgpV4Fingerprint implements CharSequence, Comparable<OpenPgpV4Fingerprint> {
|
|
|
|
public static final String SCHEME = "openpgp4fpr";
|
|
|
|
private static final Charset utf8 = Charset.forName("UTF-8");
|
|
private final String fingerprint;
|
|
|
|
/**
|
|
* Create an {@link OpenPgpV4Fingerprint}.
|
|
* @see <a href="https://xmpp.org/extensions/xep-0373.html#annoucning-pubkey">
|
|
* XEP-0373 §4.1: The OpenPGP Public-Key Data Node about how to obtain the fingerprint</a>
|
|
* @param fingerprint hexadecimal representation of the fingerprint.
|
|
*/
|
|
public OpenPgpV4Fingerprint(@Nonnull String fingerprint) {
|
|
String fp = fingerprint.replace(" ", "").trim().toUpperCase();
|
|
if (!isValid(fp)) {
|
|
throw new IllegalArgumentException("Fingerprint " + fingerprint +
|
|
" does not appear to be a valid OpenPGP v4 fingerprint.");
|
|
}
|
|
this.fingerprint = fp;
|
|
}
|
|
|
|
public OpenPgpV4Fingerprint(@Nonnull byte[] bytes) {
|
|
this(new String(bytes, utf8));
|
|
}
|
|
|
|
public OpenPgpV4Fingerprint(@Nonnull PGPPublicKey key) {
|
|
this(Hex.encode(key.getFingerprint()));
|
|
if (key.getVersion() != 4) {
|
|
throw new IllegalArgumentException("Key is not a v4 OpenPgp key.");
|
|
}
|
|
}
|
|
|
|
public OpenPgpV4Fingerprint(@Nonnull PGPSecretKey key) {
|
|
this(key.getPublicKey());
|
|
}
|
|
|
|
public OpenPgpV4Fingerprint(@Nonnull PGPPublicKeyRing ring) {
|
|
this(ring.getPublicKey());
|
|
}
|
|
|
|
public OpenPgpV4Fingerprint(@Nonnull PGPSecretKeyRing ring) {
|
|
this(ring.getPublicKey());
|
|
}
|
|
|
|
public OpenPgpV4Fingerprint(@Nonnull PGPKeyRing ring) {
|
|
this(ring.getPublicKey());
|
|
}
|
|
|
|
/**
|
|
* Check, whether the fingerprint consists of 40 valid hexadecimal characters.
|
|
* @param fp fingerprint to check.
|
|
* @return true if fingerprint is valid.
|
|
*/
|
|
private static boolean isValid(@Nonnull String fp) {
|
|
return fp.matches("[0-9A-F]{40}");
|
|
}
|
|
|
|
/**
|
|
* Return the key id of the OpenPGP public key this {@link OpenPgpV4Fingerprint} belongs to.
|
|
*
|
|
* @see <a href="https://tools.ietf.org/html/rfc4880#section-12.2">
|
|
* RFC-4880 §12.2: Key IDs and Fingerprints</a>
|
|
* @return key id
|
|
*/
|
|
public long getKeyId() {
|
|
byte[] bytes = Hex.decode(toString().getBytes(utf8));
|
|
ByteBuffer buf = ByteBuffer.wrap(bytes);
|
|
|
|
// We have to cast here in order to be compatible with java 8
|
|
// https://github.com/eclipse/jetty.project/issues/3244
|
|
((Buffer) buf).position(12);
|
|
|
|
return buf.getLong();
|
|
}
|
|
|
|
@Override
|
|
public boolean equals(Object other) {
|
|
if (other == null) {
|
|
return false;
|
|
}
|
|
|
|
if (!(other instanceof CharSequence)) {
|
|
return false;
|
|
}
|
|
|
|
return this.toString().equals(other.toString());
|
|
}
|
|
|
|
@Override
|
|
public int hashCode() {
|
|
return fingerprint.hashCode();
|
|
}
|
|
|
|
@Override
|
|
public int length() {
|
|
return fingerprint.length();
|
|
}
|
|
|
|
@Override
|
|
public char charAt(int i) {
|
|
return fingerprint.charAt(i);
|
|
}
|
|
|
|
@Override
|
|
public CharSequence subSequence(int i, int i1) {
|
|
return fingerprint.subSequence(i, i1);
|
|
}
|
|
|
|
@Override
|
|
@Nonnull
|
|
public String toString() {
|
|
return fingerprint;
|
|
}
|
|
|
|
public String prettyPrint() {
|
|
String fp = toString();
|
|
StringBuilder pretty = new StringBuilder();
|
|
for (int i = 0; i < 5; i++) {
|
|
pretty.append(fp, i * 4, (i + 1) * 4).append(' ');
|
|
}
|
|
pretty.append(' ');
|
|
for (int i = 5; i < 9; i++) {
|
|
pretty.append(fp, i * 4, (i + 1) * 4).append(' ');
|
|
}
|
|
pretty.append(fp, 36, 40);
|
|
return pretty.toString();
|
|
}
|
|
|
|
/**
|
|
* Return the fingerprint as an openpgp4fpr {@link URI}.
|
|
* An example would be 'openpgp4fpr:7F9116FEA90A5983936C7CFAA027DB2F3E1E118A'.
|
|
*
|
|
* @return openpgp4fpr fingerprint uri
|
|
* @see <a href="https://metacode.biz/openpgp/openpgp4fpr">openpgp4fpr URI scheme</a>
|
|
*/
|
|
public URI toUri() {
|
|
try {
|
|
return new URI(SCHEME, toString(), null);
|
|
} catch (URISyntaxException e) {
|
|
throw new AssertionError(e);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Convert a openpgp4fpr URI to an {@link OpenPgpV4Fingerprint}.
|
|
*
|
|
* @param uri {@link URI} with scheme 'openpgp4fpr'
|
|
* @return fingerprint parsed from the uri
|
|
* @see <a href="https://metacode.biz/openpgp/openpgp4fpr">openpgp4fpr URI scheme</a>
|
|
*/
|
|
public static OpenPgpV4Fingerprint fromUri(URI uri) {
|
|
if (!SCHEME.equals(uri.getScheme())) {
|
|
throw new IllegalArgumentException("URI scheme MUST equal '" + SCHEME + "'");
|
|
}
|
|
return new OpenPgpV4Fingerprint(uri.getSchemeSpecificPart());
|
|
}
|
|
|
|
@Override
|
|
public int compareTo(@Nonnull OpenPgpV4Fingerprint openPgpV4Fingerprint) {
|
|
return fingerprint.compareTo(openPgpV4Fingerprint.fingerprint);
|
|
}
|
|
}
|