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Kotlin conversion: ArmorUtils
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GPG key ID:
62BEE9264BF17311
3 changed files with 430 additions and 603 deletions
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// SPDX-FileCopyrightText: 2020 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.util;
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import java.io.ByteArrayInputStream;
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import java.io.ByteArrayOutputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.OutputStream;
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import java.util.ArrayList;
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import java.util.Iterator;
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import java.util.List;
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import java.util.regex.Pattern;
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import javax.annotation.Nonnull;
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import javax.annotation.Nullable;
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import org.bouncycastle.bcpg.ArmoredInputStream;
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import org.bouncycastle.bcpg.ArmoredOutputStream;
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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.PGPPublicKeyRingCollection;
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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.openpgp.PGPSecretKeyRingCollection;
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import org.bouncycastle.openpgp.PGPSignature;
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import org.bouncycastle.openpgp.PGPUtil;
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import org.bouncycastle.openpgp.operator.KeyFingerPrintCalculator;
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import org.bouncycastle.util.io.Streams;
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import org.pgpainless.algorithm.HashAlgorithm;
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import org.pgpainless.decryption_verification.OpenPgpInputStream;
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import org.pgpainless.key.OpenPgpFingerprint;
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import org.pgpainless.key.util.KeyRingUtils;
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/**
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* Utility class for dealing with ASCII armored OpenPGP data.
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*/
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public final class ArmorUtils {
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// MessageIDs are 32 printable characters
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private static final Pattern PATTERN_MESSAGE_ID = Pattern.compile("^\\S{32}$");
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/**
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* Constant armor key for comments.
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*/
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public static final String HEADER_COMMENT = "Comment";
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/**
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* Constant armor key for program versions.
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*/
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public static final String HEADER_VERSION = "Version";
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/**
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* Constant armor key for message IDs. Useful for split messages.
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*/
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public static final String HEADER_MESSAGEID = "MessageID";
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/**
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* Constant armor key for used hash algorithms in clearsigned messages.
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*/
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public static final String HEADER_HASH = "Hash";
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/**
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* Constant armor key for message character sets.
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*/
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public static final String HEADER_CHARSET = "Charset";
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private ArmorUtils() {
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}
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/**
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* Return the ASCII armored encoding of the given {@link PGPSecretKey}.
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*
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* @param secretKey secret key
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* @return ASCII armored encoding
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*
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* @throws IOException in case of an io error
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*/
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@Nonnull
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public static String toAsciiArmoredString(@Nonnull PGPSecretKey secretKey)
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throws IOException {
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MultiMap<String, String> header = keyToHeader(secretKey.getPublicKey());
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return toAsciiArmoredString(secretKey.getEncoded(), header);
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}
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/**
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* Return the ASCII armored encoding of the given {@link PGPPublicKey}.
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*
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* @param publicKey public key
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* @return ASCII armored encoding
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*
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* @throws IOException in case of an io error
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*/
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@Nonnull
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public static String toAsciiArmoredString(@Nonnull PGPPublicKey publicKey)
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throws IOException {
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MultiMap<String, String> header = keyToHeader(publicKey);
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return toAsciiArmoredString(publicKey.getEncoded(), header);
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}
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/**
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* Return the ASCII armored encoding of the given {@link PGPSecretKeyRing}.
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*
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* @param secretKeys secret key ring
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* @return ASCII armored encoding
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*
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* @throws IOException in case of an io error
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*/
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@Nonnull
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public static String toAsciiArmoredString(@Nonnull PGPSecretKeyRing secretKeys)
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throws IOException {
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MultiMap<String, String> header = keysToHeader(secretKeys);
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return toAsciiArmoredString(secretKeys.getEncoded(), header);
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}
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/**
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* Return the ASCII armored encoding of the given {@link PGPPublicKeyRing}.
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*
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* @param publicKeys public key ring
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* @return ASCII armored encoding
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*
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* @throws IOException in case of an io error
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*/
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@Nonnull
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public static String toAsciiArmoredString(@Nonnull PGPPublicKeyRing publicKeys)
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throws IOException {
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MultiMap<String, String> header = keysToHeader(publicKeys);
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return toAsciiArmoredString(publicKeys.getEncoded(), header);
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}
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/**
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* Return the ASCII armored encoding of the given {@link PGPSecretKeyRingCollection}.
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* The encoding will use per-key ASCII armors protecting each {@link PGPSecretKeyRing} individually.
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* Those armors are then concatenated with newlines in between.
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*
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* @param secretKeyRings secret key ring collection
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* @return ASCII armored encoding
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*
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* @throws IOException in case of an io error
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*/
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@Nonnull
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public static String toAsciiArmoredString(@Nonnull PGPSecretKeyRingCollection secretKeyRings)
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throws IOException {
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StringBuilder sb = new StringBuilder();
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for (Iterator<PGPSecretKeyRing> iterator = secretKeyRings.iterator(); iterator.hasNext(); ) {
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PGPSecretKeyRing secretKeyRing = iterator.next();
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sb.append(toAsciiArmoredString(secretKeyRing));
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if (iterator.hasNext()) {
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sb.append('\n');
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}
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}
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return sb.toString();
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}
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/**
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* Return the ASCII armored encoding of the given {@link PGPPublicKeyRingCollection}.
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* The encoding will use per-key ASCII armors protecting each {@link PGPPublicKeyRing} individually.
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* Those armors are then concatenated with newlines in between.
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*
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* @param publicKeyRings public key ring collection
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* @return ascii armored encoding
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*
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* @throws IOException in case of an io error
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*/
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@Nonnull
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public static String toAsciiArmoredString(@Nonnull PGPPublicKeyRingCollection publicKeyRings)
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throws IOException {
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StringBuilder sb = new StringBuilder();
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for (Iterator<PGPPublicKeyRing> iterator = publicKeyRings.iterator(); iterator.hasNext(); ) {
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PGPPublicKeyRing publicKeyRing = iterator.next();
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sb.append(toAsciiArmoredString(publicKeyRing));
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if (iterator.hasNext()) {
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sb.append('\n');
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}
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}
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return sb.toString();
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}
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/**
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* Return the ASCII armored representation of the given detached signature.
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* The signature will not be stripped of non-exportable subpackets or trust-packets.
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* If you need to strip those (e.g. because the signature is intended to be sent to a third party), use
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* {@link #toAsciiArmoredString(PGPSignature, boolean)} and provide <pre>true</pre> as boolean value.
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*
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* @param signature signature
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* @return ascii armored string
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*
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* @throws IOException in case of an error in the {@link ArmoredOutputStream}
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*/
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@Nonnull
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public static String toAsciiArmoredString(@Nonnull PGPSignature signature) throws IOException {
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return toAsciiArmoredString(signature, false);
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}
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/**
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* Return the ASCII armored representation of the given detached signature.
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* If <pre>export</pre> is true, the signature will be stripped of non-exportable subpackets or trust-packets.
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* If it is <pre>false</pre>, the signature will be encoded as-is.
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*
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* @param signature signature
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* @param export whether to exclude non-exportable subpackets or trust-packets.
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* @return ascii armored string
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*
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* @throws IOException in case of an error in the {@link ArmoredOutputStream}
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*/
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@Nonnull
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public static String toAsciiArmoredString(@Nonnull PGPSignature signature, boolean export)
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throws IOException {
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return toAsciiArmoredString(signature.getEncoded(export));
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}
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/**
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* Return the ASCII armored encoding of the given OpenPGP data bytes.
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*
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* @param bytes openpgp data
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* @return ASCII armored encoding
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*
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* @throws IOException in case of an io error
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*/
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@Nonnull
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public static String toAsciiArmoredString(@Nonnull byte[] bytes)
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throws IOException {
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return toAsciiArmoredString(bytes, null);
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}
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/**
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* Return the ASCII armored encoding of the given OpenPGP data bytes.
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* The ASCII armor will include headers from the header map.
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*
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* @param bytes OpenPGP data
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* @param additionalHeaderValues header map
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* @return ASCII armored encoding
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*
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* @throws IOException in case of an io error
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*/
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@Nonnull
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public static String toAsciiArmoredString(@Nonnull byte[] bytes,
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@Nullable MultiMap<String, String> additionalHeaderValues)
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throws IOException {
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return toAsciiArmoredString(new ByteArrayInputStream(bytes), additionalHeaderValues);
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}
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/**
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* Return the ASCII armored encoding of the {@link InputStream} containing OpenPGP data.
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*
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* @param inputStream input stream of OpenPGP data
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* @return ASCII armored encoding
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*
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* @throws IOException in case of an io error
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*/
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@Nonnull
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public static String toAsciiArmoredString(@Nonnull InputStream inputStream)
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throws IOException {
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return toAsciiArmoredString(inputStream, null);
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}
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/**
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* Return the ASCII armored encoding of the OpenPGP data from the given {@link InputStream}.
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* The ASCII armor will include armor headers from the given header map.
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*
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* @param inputStream input stream of OpenPGP data
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* @param additionalHeaderValues ASCII armor header map
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* @return ASCII armored encoding
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*
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* @throws IOException in case of an io error
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*/
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@Nonnull
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public static String toAsciiArmoredString(@Nonnull InputStream inputStream,
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@Nullable MultiMap<String, String> additionalHeaderValues)
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throws IOException {
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ByteArrayOutputStream out = new ByteArrayOutputStream();
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ArmoredOutputStream armor = toAsciiArmoredStream(out, additionalHeaderValues);
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Streams.pipeAll(inputStream, armor);
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armor.close();
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return out.toString();
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}
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/**
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* Return an {@link ArmoredOutputStream} prepared with headers for the given key ring, which wraps the given
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* {@link OutputStream}.
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*
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* The armored output stream can be used to encode the key ring by calling {@link PGPKeyRing#encode(OutputStream)}
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* with the armored output stream as an argument.
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*
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* @param keyRing key ring
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* @param outputStream wrapped output stream
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* @return armored output stream
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*/
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@Nonnull
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public static ArmoredOutputStream toAsciiArmoredStream(@Nonnull PGPKeyRing keyRing,
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@Nonnull OutputStream outputStream) {
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MultiMap<String, String> header = keysToHeader(keyRing);
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return toAsciiArmoredStream(outputStream, header);
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}
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/**
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* Create an {@link ArmoredOutputStream} wrapping the given {@link OutputStream}.
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* The armored output stream will be prepared with armor headers given by header.
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*
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* Note: Since the armored output stream is retrieved from {@link ArmoredOutputStreamFactory#get(OutputStream)},
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* it may already come with custom headers. Hence, the header entries given by header are appended below those
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* already populated headers.
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*
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* @param outputStream output stream to wrap
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* @param header map of header entries
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* @return armored output stream
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*/
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@Nonnull
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public static ArmoredOutputStream toAsciiArmoredStream(@Nonnull OutputStream outputStream,
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@Nullable MultiMap<String, String> header) {
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ArmoredOutputStream armoredOutputStream = ArmoredOutputStreamFactory.get(outputStream);
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if (header != null) {
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for (String headerKey : header.keySet()) {
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for (String headerValue : header.get(headerKey)) {
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armoredOutputStream.addHeader(headerKey, headerValue);
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}
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}
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}
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return armoredOutputStream;
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}
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/**
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* Generate a header map for ASCII armor from the given {@link PGPKeyRing}.
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*
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* @param keyRing key ring
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* @return header map
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*/
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@Nonnull
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private static MultiMap<String, String> keysToHeader(@Nonnull PGPKeyRing keyRing) {
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PGPPublicKey publicKey = keyRing.getPublicKey();
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return keyToHeader(publicKey);
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}
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/**
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* Generate a header map for ASCII armor from the given {@link PGPPublicKey}.
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* The header map consists of a comment field of the keys pretty-printed fingerprint,
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* as well as some optional user-id information (see {@link #setUserIdInfoOnHeader(MultiMap, PGPPublicKey)}.
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*
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* @param publicKey public key
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* @return header map
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*/
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@Nonnull
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private static MultiMap<String, String> keyToHeader(@Nonnull PGPPublicKey publicKey) {
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MultiMap<String, String> header = new MultiMap<>();
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OpenPgpFingerprint fingerprint = OpenPgpFingerprint.of(publicKey);
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header.put(HEADER_COMMENT, fingerprint.prettyPrint());
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setUserIdInfoOnHeader(header, publicKey);
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return header;
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}
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/**
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* Add user-id information to the header map.
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* If the key is carrying at least one user-id, we add a comment for the probable primary user-id.
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* If the key carries more than one user-id, we further add a comment stating how many further identities
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* the key has.
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*
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* @param header header map
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* @param publicKey public key
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*/
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private static void setUserIdInfoOnHeader(@Nonnull MultiMap<String, String> header,
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@Nonnull PGPPublicKey publicKey) {
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Tuple<String, Integer> idCount = getPrimaryUserIdAndUserIdCount(publicKey);
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String primary = idCount.getA();
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int totalCount = idCount.getB();
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if (primary != null) {
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header.put(HEADER_COMMENT, primary);
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}
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if (totalCount == 2) {
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header.put(HEADER_COMMENT, "1 further identity");
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} else if (totalCount > 2) {
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header.put(HEADER_COMMENT, String.format("%d further identities", totalCount - 1));
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}
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}
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/**
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* Determine a probable primary user-id, as well as the total number of user-ids on the given {@link PGPPublicKey}.
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* This method is trimmed for efficiency and does not do any cryptographic validation of signatures.
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*
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* The key might not have any user-id at all, in which case {@link Tuple#getA()} will return null.
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|
||||||
* The key might have some user-ids, but none of it marked as primary, in which case {@link Tuple#getA()}
|
|
||||||
* will return the first user-id of the key.
|
|
||||||
*
|
|
||||||
* @param publicKey public key
|
|
||||||
* @return tuple consisting of a primary user-id candidate, and the total number of user-ids on the key.
|
|
||||||
*/
|
|
||||||
@Nonnull
|
|
||||||
private static Tuple<String, Integer> getPrimaryUserIdAndUserIdCount(@Nonnull PGPPublicKey publicKey) {
|
|
||||||
// Quickly determine the primary user-id + number of total user-ids
|
|
||||||
// NOTE: THIS METHOD DOES NOT CRYPTOGRAPHICALLY VERIFY THE SIGNATURES
|
|
||||||
// DO NOT RELY ON IT!
|
|
||||||
List<String> userIds = KeyRingUtils.getUserIdsIgnoringInvalidUTF8(publicKey);
|
|
||||||
int countIdentities = 0;
|
|
||||||
String first = null;
|
|
||||||
String primary = null;
|
|
||||||
for (String userId : userIds) {
|
|
||||||
countIdentities++;
|
|
||||||
// remember the first user-id
|
|
||||||
if (first == null) {
|
|
||||||
first = userId;
|
|
||||||
}
|
|
||||||
|
|
||||||
if (primary == null) {
|
|
||||||
Iterator<PGPSignature> signatures = publicKey.getSignaturesForID(userId);
|
|
||||||
while (signatures.hasNext()) {
|
|
||||||
PGPSignature signature = signatures.next();
|
|
||||||
if (signature.getHashedSubPackets().isPrimaryUserID()) {
|
|
||||||
primary = userId;
|
|
||||||
break;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
}
|
|
||||||
}
|
|
||||||
// It may happen that no user-id is marked as primary
|
|
||||||
// in that case print the first one
|
|
||||||
String printed = primary != null ? primary : first;
|
|
||||||
return new Tuple<>(printed, countIdentities);
|
|
||||||
}
|
|
||||||
|
|
||||||
/**
|
|
||||||
* Set the version header entry in the ASCII armor.
|
|
||||||
* If the version info is null or only contains whitespace characters, then the version header will be removed.
|
|
||||||
*
|
|
||||||
* @param armor armored output stream
|
|
||||||
* @param version version header.
|
|
||||||
*/
|
|
||||||
public static void setVersionHeader(@Nonnull ArmoredOutputStream armor,
|
|
||||||
@Nullable String version) {
|
|
||||||
if (version == null || version.trim().isEmpty()) {
|
|
||||||
armor.setHeader(HEADER_VERSION, null);
|
|
||||||
} else {
|
|
||||||
armor.setHeader(HEADER_VERSION, version);
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
/**
|
|
||||||
* Add an ASCII armor header entry about the used hash algorithm into the {@link ArmoredOutputStream}.
|
|
||||||
*
|
|
||||||
* @param armor armored output stream
|
|
||||||
* @param hashAlgorithm hash algorithm
|
|
||||||
*
|
|
||||||
* @see <a href="https://datatracker.ietf.org/doc/html/rfc4880#section-6.2">
|
|
||||||
* RFC 4880 - OpenPGP Message Format §6.2. Forming ASCII Armor</a>
|
|
||||||
*/
|
|
||||||
public static void addHashAlgorithmHeader(@Nonnull ArmoredOutputStream armor,
|
|
||||||
@Nonnull HashAlgorithm hashAlgorithm) {
|
|
||||||
armor.addHeader(HEADER_HASH, hashAlgorithm.getAlgorithmName());
|
|
||||||
}
|
|
||||||
|
|
||||||
/**
|
|
||||||
* Add an ASCII armor comment header entry into the {@link ArmoredOutputStream}.
|
|
||||||
*
|
|
||||||
* @param armor armored output stream
|
|
||||||
* @param comment free-text comment
|
|
||||||
*
|
|
||||||
* @see <a href="https://datatracker.ietf.org/doc/html/rfc4880#section-6.2">
|
|
||||||
* RFC 4880 - OpenPGP Message Format §6.2. Forming ASCII Armor</a>
|
|
||||||
*/
|
|
||||||
public static void addCommentHeader(@Nonnull ArmoredOutputStream armor,
|
|
||||||
@Nonnull String comment) {
|
|
||||||
armor.addHeader(HEADER_COMMENT, comment);
|
|
||||||
}
|
|
||||||
|
|
||||||
/**
|
|
||||||
* Add an ASCII armor message-id header entry into the {@link ArmoredOutputStream}.
|
|
||||||
*
|
|
||||||
* @param armor armored output stream
|
|
||||||
* @param messageId message id
|
|
||||||
*
|
|
||||||
* @see <a href="https://datatracker.ietf.org/doc/html/rfc4880#section-6.2">
|
|
||||||
* RFC 4880 - OpenPGP Message Format §6.2. Forming ASCII Armor</a>
|
|
||||||
*/
|
|
||||||
public static void addMessageIdHeader(@Nonnull ArmoredOutputStream armor,
|
|
||||||
@Nonnull String messageId) {
|
|
||||||
if (!PATTERN_MESSAGE_ID.matcher(messageId).matches()) {
|
|
||||||
throw new IllegalArgumentException("MessageIDs MUST consist of 32 printable characters.");
|
|
||||||
}
|
|
||||||
armor.addHeader(HEADER_MESSAGEID, messageId);
|
|
||||||
}
|
|
||||||
|
|
||||||
/**
|
|
||||||
* Extract all ASCII armor header values of type comment from the given {@link ArmoredInputStream}.
|
|
||||||
*
|
|
||||||
* @param armor armored input stream
|
|
||||||
* @return list of comment headers
|
|
||||||
*/
|
|
||||||
@Nonnull
|
|
||||||
public static List<String> getCommentHeaderValues(@Nonnull ArmoredInputStream armor) {
|
|
||||||
return getArmorHeaderValues(armor, HEADER_COMMENT);
|
|
||||||
}
|
|
||||||
|
|
||||||
/**
|
|
||||||
* Extract all ASCII armor header values of type message id from the given {@link ArmoredInputStream}.
|
|
||||||
*
|
|
||||||
* @param armor armored input stream
|
|
||||||
* @return list of message-id headers
|
|
||||||
*/
|
|
||||||
@Nonnull
|
|
||||||
public static List<String> getMessageIdHeaderValues(@Nonnull ArmoredInputStream armor) {
|
|
||||||
return getArmorHeaderValues(armor, HEADER_MESSAGEID);
|
|
||||||
}
|
|
||||||
|
|
||||||
/**
|
|
||||||
* Return all ASCII armor header values of type hash-algorithm from the given {@link ArmoredInputStream}.
|
|
||||||
*
|
|
||||||
* @param armor armored input stream
|
|
||||||
* @return list of hash headers
|
|
||||||
*/
|
|
||||||
@Nonnull
|
|
||||||
public static List<String> getHashHeaderValues(@Nonnull ArmoredInputStream armor) {
|
|
||||||
return getArmorHeaderValues(armor, HEADER_HASH);
|
|
||||||
}
|
|
||||||
|
|
||||||
/**
|
|
||||||
* Return a list of {@link HashAlgorithm} enums extracted from the hash header entries of the given
|
|
||||||
* {@link ArmoredInputStream}.
|
|
||||||
*
|
|
||||||
* @param armor armored input stream
|
|
||||||
* @return list of hash algorithms from the ASCII header
|
|
||||||
*/
|
|
||||||
@Nonnull
|
|
||||||
public static List<HashAlgorithm> getHashAlgorithms(@Nonnull ArmoredInputStream armor) {
|
|
||||||
List<String> algorithmNames = getHashHeaderValues(armor);
|
|
||||||
List<HashAlgorithm> algorithms = new ArrayList<>();
|
|
||||||
for (String name : algorithmNames) {
|
|
||||||
HashAlgorithm algorithm = HashAlgorithm.fromName(name);
|
|
||||||
if (algorithm != null) {
|
|
||||||
algorithms.add(algorithm);
|
|
||||||
}
|
|
||||||
}
|
|
||||||
return algorithms;
|
|
||||||
}
|
|
||||||
|
|
||||||
/**
|
|
||||||
* Return all ASCII armor header values of type version from the given {@link ArmoredInputStream}.
|
|
||||||
*
|
|
||||||
* @param armor armored input stream
|
|
||||||
* @return list of version headers
|
|
||||||
*/
|
|
||||||
@Nonnull
|
|
||||||
public static List<String> getVersionHeaderValues(@Nonnull ArmoredInputStream armor) {
|
|
||||||
return getArmorHeaderValues(armor, HEADER_VERSION);
|
|
||||||
}
|
|
||||||
|
|
||||||
/**
|
|
||||||
* Return all ASCII armor header values of type charset from the given {@link ArmoredInputStream}.
|
|
||||||
*
|
|
||||||
* @param armor armored input stream
|
|
||||||
* @return list of charset headers
|
|
||||||
*/
|
|
||||||
@Nonnull
|
|
||||||
public static List<String> getCharsetHeaderValues(@Nonnull ArmoredInputStream armor) {
|
|
||||||
return getArmorHeaderValues(armor, HEADER_CHARSET);
|
|
||||||
}
|
|
||||||
|
|
||||||
/**
|
|
||||||
* Return all ASCII armor header values of the given headerKey from the given {@link ArmoredInputStream}.
|
|
||||||
*
|
|
||||||
* @param armor armored input stream
|
|
||||||
* @param headerKey ASCII armor header key
|
|
||||||
* @return list of values for the header key
|
|
||||||
*/
|
|
||||||
@Nonnull
|
|
||||||
public static List<String> getArmorHeaderValues(@Nonnull ArmoredInputStream armor,
|
|
||||||
@Nonnull String headerKey) {
|
|
||||||
String[] header = armor.getArmorHeaders();
|
|
||||||
String key = headerKey + ": ";
|
|
||||||
List<String> values = new ArrayList<>();
|
|
||||||
for (String line : header) {
|
|
||||||
if (line.startsWith(key)) {
|
|
||||||
values.add(line.substring(key.length()));
|
|
||||||
}
|
|
||||||
}
|
|
||||||
return values;
|
|
||||||
}
|
|
||||||
|
|
||||||
/**
|
|
||||||
* Hacky workaround for #96.
|
|
||||||
* For {@link PGPPublicKeyRingCollection#PGPPublicKeyRingCollection(InputStream, KeyFingerPrintCalculator)}
|
|
||||||
* or {@link PGPSecretKeyRingCollection#PGPSecretKeyRingCollection(InputStream, KeyFingerPrintCalculator)}
|
|
||||||
* to read all PGPKeyRings properly, we apparently have to make sure that the {@link InputStream} that is given
|
|
||||||
* as constructor argument is a PGPUtil.BufferedInputStreamExt.
|
|
||||||
* Since {@link PGPUtil#getDecoderStream(InputStream)} will return an {@link org.bouncycastle.bcpg.ArmoredInputStream}
|
|
||||||
* if the underlying input stream contains armored data, we first dearmor the data ourselves to make sure that the
|
|
||||||
* end-result is a PGPUtil.BufferedInputStreamExt.
|
|
||||||
*
|
|
||||||
* @param inputStream input stream
|
|
||||||
* @return BufferedInputStreamExt
|
|
||||||
*
|
|
||||||
* @throws IOException in case of an IO error
|
|
||||||
*/
|
|
||||||
@Nonnull
|
|
||||||
public static InputStream getDecoderStream(@Nonnull InputStream inputStream)
|
|
||||||
throws IOException {
|
|
||||||
OpenPgpInputStream openPgpIn = new OpenPgpInputStream(inputStream);
|
|
||||||
if (openPgpIn.isAsciiArmored()) {
|
|
||||||
ArmoredInputStream armorIn = ArmoredInputStreamFactory.get(openPgpIn);
|
|
||||||
return PGPUtil.getDecoderStream(armorIn);
|
|
||||||
}
|
|
||||||
|
|
||||||
return openPgpIn;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
@ -4,6 +4,14 @@
|
||||||
|
|
||||||
package org.pgpainless.util;
|
package org.pgpainless.util;
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Helper class pairing together two values.
|
||||||
|
* @param <A> type of the first value
|
||||||
|
* @param <B> type of the second value
|
||||||
|
* @deprecated Scheduled for removal.
|
||||||
|
* TODO: Remove
|
||||||
|
*/
|
||||||
|
@Deprecated
|
||||||
public class Tuple<A, B> {
|
public class Tuple<A, B> {
|
||||||
|
|
||||||
private final A a;
|
private final A a;
|
||||||
|
|
|
||||||
|
|
@ -0,0 +1,422 @@
|
||||||
|
// SPDX-FileCopyrightText: 2023 Paul Schaub <vanitasvitae@fsfe.org>
|
||||||
|
//
|
||||||
|
// SPDX-License-Identifier: Apache-2.0package org.pgpainless.util
|
||||||
|
|
||||||
|
package org.pgpainless.util
|
||||||
|
|
||||||
|
import org.bouncycastle.bcpg.ArmoredInputStream
|
||||||
|
import org.bouncycastle.bcpg.ArmoredOutputStream
|
||||||
|
import org.bouncycastle.openpgp.PGPKeyRing
|
||||||
|
import org.bouncycastle.openpgp.PGPPublicKey
|
||||||
|
import org.bouncycastle.openpgp.PGPPublicKeyRing
|
||||||
|
import org.bouncycastle.openpgp.PGPPublicKeyRingCollection
|
||||||
|
import org.bouncycastle.openpgp.PGPSecretKey
|
||||||
|
import org.bouncycastle.openpgp.PGPSecretKeyRing
|
||||||
|
import org.bouncycastle.openpgp.PGPSecretKeyRingCollection
|
||||||
|
import org.bouncycastle.openpgp.PGPSignature
|
||||||
|
import org.bouncycastle.openpgp.PGPUtil
|
||||||
|
import org.bouncycastle.util.io.Streams
|
||||||
|
import org.pgpainless.algorithm.HashAlgorithm
|
||||||
|
import org.pgpainless.decryption_verification.OpenPgpInputStream
|
||||||
|
import org.pgpainless.key.OpenPgpFingerprint
|
||||||
|
import org.pgpainless.key.util.KeyRingUtils
|
||||||
|
import java.io.ByteArrayOutputStream
|
||||||
|
import java.io.IOException
|
||||||
|
import java.io.InputStream
|
||||||
|
import java.io.OutputStream
|
||||||
|
|
||||||
|
class ArmorUtils {
|
||||||
|
|
||||||
|
companion object {
|
||||||
|
// MessageIDs are 32 printable characters
|
||||||
|
private val PATTER_MESSAGE_ID = "^\\S{32}$".toRegex()
|
||||||
|
/**
|
||||||
|
* Constant armor key for comments.
|
||||||
|
*/
|
||||||
|
const val HEADER_COMMENT = "Comment"
|
||||||
|
/**
|
||||||
|
* Constant armor key for program versions.
|
||||||
|
*/
|
||||||
|
const val HEADER_VERSION = "Version"
|
||||||
|
/**
|
||||||
|
* Constant armor key for message IDs. Useful for split messages.
|
||||||
|
*/
|
||||||
|
const val HEADER_MESSAGEID = "MessageID"
|
||||||
|
/**
|
||||||
|
* Constant armor key for used hash algorithms in clearsigned messages.
|
||||||
|
*/
|
||||||
|
const val HEADER_HASH = "Hash"
|
||||||
|
/**
|
||||||
|
* Constant armor key for message character sets.
|
||||||
|
*/
|
||||||
|
const val HEADER_CHARSET = "Charset"
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Return the ASCII armored encoding of the given [PGPSecretKey].
|
||||||
|
*
|
||||||
|
* @param secretKey secret key
|
||||||
|
* @return ASCII armored encoding
|
||||||
|
*
|
||||||
|
* @throws IOException in case of an io error
|
||||||
|
*/
|
||||||
|
@JvmStatic
|
||||||
|
@Throws(IOException::class)
|
||||||
|
fun toAsciiArmoredString(secretKey: PGPSecretKey): String =
|
||||||
|
toAsciiArmoredString(secretKey.encoded, keyToHeader(secretKey.publicKey))
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Return the ASCII armored encoding of the given [PGPPublicKey].
|
||||||
|
*
|
||||||
|
* @param publicKey public key
|
||||||
|
* @return ASCII armored encoding
|
||||||
|
*
|
||||||
|
* @throws IOException in case of an io error
|
||||||
|
*/
|
||||||
|
@JvmStatic
|
||||||
|
@Throws(IOException::class)
|
||||||
|
fun toAsciiArmoredString(publicKey: PGPPublicKey): String =
|
||||||
|
toAsciiArmoredString(publicKey.encoded, keyToHeader(publicKey))
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Return the ASCII armored encoding of the given [PGPSecretKeyRing].
|
||||||
|
*
|
||||||
|
* @param secretKeys secret key ring
|
||||||
|
* @return ASCII armored encoding
|
||||||
|
*
|
||||||
|
* @throws IOException in case of an io error
|
||||||
|
*/
|
||||||
|
@JvmStatic
|
||||||
|
@Throws(IOException::class)
|
||||||
|
fun toAsciiArmoredString(secretKeys: PGPSecretKeyRing): String =
|
||||||
|
toAsciiArmoredString(secretKeys.encoded, keyToHeader(secretKeys.publicKey))
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Return the ASCII armored encoding of the given [PGPPublicKeyRing].
|
||||||
|
*
|
||||||
|
* @param certificate public key ring
|
||||||
|
* @return ASCII armored encoding
|
||||||
|
*
|
||||||
|
* @throws IOException in case of an io error
|
||||||
|
*/
|
||||||
|
@JvmStatic
|
||||||
|
@Throws(IOException::class)
|
||||||
|
fun toAsciiArmoredString(certificate: PGPPublicKeyRing): String =
|
||||||
|
toAsciiArmoredString(certificate.encoded, keyToHeader(certificate.publicKey))
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Return the ASCII armored encoding of the given [PGPSecretKeyRingCollection].
|
||||||
|
* The encoding will use per-key ASCII armors protecting each [PGPSecretKeyRing] individually.
|
||||||
|
* Those armors are then concatenated with newlines in between.
|
||||||
|
*
|
||||||
|
* @param secretKeysCollection secret key ring collection
|
||||||
|
* @return ASCII armored encoding
|
||||||
|
*
|
||||||
|
* @throws IOException in case of an io error
|
||||||
|
*/
|
||||||
|
@JvmStatic
|
||||||
|
@Throws(IOException::class)
|
||||||
|
fun toAsciiArmoredString(secretKeysCollection: PGPSecretKeyRingCollection): String =
|
||||||
|
secretKeysCollection.keyRings.asSequence()
|
||||||
|
.joinToString("\n") { toAsciiArmoredString(it) }
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Return the ASCII armored encoding of the given [PGPPublicKeyRingCollection].
|
||||||
|
* The encoding will use per-key ASCII armors protecting each [PGPPublicKeyRing] individually.
|
||||||
|
* Those armors are then concatenated with newlines in between.
|
||||||
|
*
|
||||||
|
* @param certificates public key ring collection
|
||||||
|
* @return ascii armored encoding
|
||||||
|
*
|
||||||
|
* @throws IOException in case of an io error
|
||||||
|
*/
|
||||||
|
@JvmStatic
|
||||||
|
@Throws(IOException::class)
|
||||||
|
fun toAsciiArmoredString(certificates: PGPPublicKeyRingCollection): String =
|
||||||
|
certificates.joinToString("\n") { toAsciiArmoredString(it) }
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Return the ASCII armored representation of the given detached signature.
|
||||||
|
* If [export] is true, the signature will be stripped of non-exportable subpackets or trust-packets.
|
||||||
|
* If it is false, the signature will be encoded as-is.
|
||||||
|
*
|
||||||
|
* @param signature signature
|
||||||
|
* @param export whether to exclude non-exportable subpackets or trust-packets.
|
||||||
|
* @return ascii armored string
|
||||||
|
*
|
||||||
|
* @throws IOException in case of an error in the [ArmoredOutputStream]
|
||||||
|
*/
|
||||||
|
@JvmStatic
|
||||||
|
@JvmOverloads
|
||||||
|
@Throws(IOException::class)
|
||||||
|
fun toAsciiArmoredString(signature: PGPSignature, export: Boolean = false): String =
|
||||||
|
toAsciiArmoredString(signature.getEncoded(export))
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Return the ASCII armored encoding of the given OpenPGP data bytes.
|
||||||
|
* The ASCII armor will include headers from the header map.
|
||||||
|
*
|
||||||
|
* @param bytes OpenPGP data
|
||||||
|
* @param header header map
|
||||||
|
* @return ASCII armored encoding
|
||||||
|
*
|
||||||
|
* @throws IOException in case of an io error
|
||||||
|
*/
|
||||||
|
@JvmStatic
|
||||||
|
@JvmOverloads
|
||||||
|
@Throws(IOException::class)
|
||||||
|
fun toAsciiArmoredString(bytes: ByteArray, header: Map<String, Set<String>>? = null): String =
|
||||||
|
toAsciiArmoredString(bytes.inputStream(), header)
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Return the ASCII armored encoding of the OpenPGP data from the given {@link InputStream}.
|
||||||
|
* The ASCII armor will include armor headers from the given header map.
|
||||||
|
*
|
||||||
|
* @param inputStream input stream of OpenPGP data
|
||||||
|
* @param header ASCII armor header map
|
||||||
|
* @return ASCII armored encoding
|
||||||
|
*
|
||||||
|
* @throws IOException in case of an io error
|
||||||
|
*/
|
||||||
|
@JvmStatic
|
||||||
|
@JvmOverloads
|
||||||
|
@Throws(IOException::class)
|
||||||
|
fun toAsciiArmoredString(inputStream: InputStream, header: Map<String, Set<String>>? = null): String =
|
||||||
|
ByteArrayOutputStream().apply {
|
||||||
|
toAsciiArmoredStream(this, header).run {
|
||||||
|
Streams.pipeAll(inputStream, this)
|
||||||
|
this.close()
|
||||||
|
}
|
||||||
|
}.toString()
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Return an [ArmoredOutputStream] prepared with headers for the given key ring, which wraps the given
|
||||||
|
* {@link OutputStream}.
|
||||||
|
*
|
||||||
|
* The armored output stream can be used to encode the key ring by calling [PGPKeyRing.encode]
|
||||||
|
* with the armored output stream as an argument.
|
||||||
|
*
|
||||||
|
* @param keys OpenPGP key or certificate
|
||||||
|
* @param outputStream wrapped output stream
|
||||||
|
* @return armored output stream
|
||||||
|
*/
|
||||||
|
@JvmStatic
|
||||||
|
@Throws(IOException::class)
|
||||||
|
fun toAsciiArmoredStream(keys: PGPKeyRing, outputStream: OutputStream): ArmoredOutputStream =
|
||||||
|
toAsciiArmoredStream(outputStream, keyToHeader(keys.publicKey))
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Create an [ArmoredOutputStream] wrapping the given [OutputStream].
|
||||||
|
* The armored output stream will be prepared with armor headers given by header.
|
||||||
|
*
|
||||||
|
* Note: Since the armored output stream is retrieved from [ArmoredOutputStreamFactory.get],
|
||||||
|
* it may already come with custom headers. Hence, the header entries given by header are appended below those
|
||||||
|
* already populated headers.
|
||||||
|
*
|
||||||
|
* @param outputStream output stream to wrap
|
||||||
|
* @param header map of header entries
|
||||||
|
* @return armored output stream
|
||||||
|
*/
|
||||||
|
@JvmStatic
|
||||||
|
@JvmOverloads
|
||||||
|
@Throws(IOException::class)
|
||||||
|
fun toAsciiArmoredStream(outputStream: OutputStream, header: Map<String, Set<String>>? = null): ArmoredOutputStream =
|
||||||
|
ArmoredOutputStreamFactory.get(outputStream).apply {
|
||||||
|
header?.forEach { entry ->
|
||||||
|
entry.value.forEach { value ->
|
||||||
|
addHeader(entry.key, value)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Generate a header map for ASCII armor from the given [PGPPublicKey].
|
||||||
|
* The header map consists of a comment field of the keys pretty-printed fingerprint,
|
||||||
|
* as well as the primary or first user-id plus the count of remaining user-ids.
|
||||||
|
*
|
||||||
|
* @param publicKey public key
|
||||||
|
* @return header map
|
||||||
|
*/
|
||||||
|
@JvmStatic
|
||||||
|
private fun keyToHeader(publicKey: PGPPublicKey): Map<String, Set<String>> {
|
||||||
|
val headerMap = mutableMapOf<String, MutableSet<String>>()
|
||||||
|
val userIds = KeyRingUtils.getUserIdsIgnoringInvalidUTF8(publicKey)
|
||||||
|
val first: String? = userIds.firstOrNull()
|
||||||
|
val primary: String? = userIds.firstOrNull {
|
||||||
|
publicKey.getSignaturesForID(it)?.asSequence()?.any { sig ->
|
||||||
|
sig.hashedSubPackets.isPrimaryUserID
|
||||||
|
} ?: false
|
||||||
|
}
|
||||||
|
|
||||||
|
// Fingerprint
|
||||||
|
headerMap.getOrPut(HEADER_COMMENT) { mutableSetOf() }.add(OpenPgpFingerprint.of(publicKey).prettyPrint())
|
||||||
|
// Primary / First User ID
|
||||||
|
(primary ?: first)?.let { headerMap.getOrPut(HEADER_COMMENT) { mutableSetOf() }.add(it) }
|
||||||
|
// X-1 further identities
|
||||||
|
when (userIds.size) {
|
||||||
|
0, 1 -> {}
|
||||||
|
2 -> headerMap.getOrPut(HEADER_COMMENT) { mutableSetOf() }.add("1 further identity")
|
||||||
|
else -> headerMap.getOrPut(HEADER_COMMENT) { mutableSetOf() }.add("${userIds.size - 1} further identities")
|
||||||
|
}
|
||||||
|
return headerMap
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Set the version header entry in the ASCII armor.
|
||||||
|
* If the version info is null or only contains whitespace characters, then the version header will be removed.
|
||||||
|
*
|
||||||
|
* @param armor armored output stream
|
||||||
|
* @param version version header.
|
||||||
|
*/
|
||||||
|
@JvmStatic
|
||||||
|
@Deprecated("Changing ASCII armor headers after ArmoredOutputStream creation is deprecated. " +
|
||||||
|
"Use ArmoredOutputStream builder instead.")
|
||||||
|
fun setVersionHeader(armor: ArmoredOutputStream, version: String?) =
|
||||||
|
armor.setHeader(HEADER_VERSION, version?.let { it.ifBlank { null } })
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Add an ASCII armor header entry about the used hash algorithm into the [ArmoredOutputStream].
|
||||||
|
*
|
||||||
|
* @param armor armored output stream
|
||||||
|
* @param hashAlgorithm hash algorithm
|
||||||
|
*
|
||||||
|
* @see <a href="https://datatracker.ietf.org/doc/html/rfc4880#section-6.2">
|
||||||
|
* RFC 4880 - OpenPGP Message Format §6.2. Forming ASCII Armor</a>
|
||||||
|
*/
|
||||||
|
@JvmStatic
|
||||||
|
@Deprecated("Changing ASCII armor headers after ArmoredOutputStream creation is deprecated. " +
|
||||||
|
"Use ArmoredOutputStream builder instead.")
|
||||||
|
fun addHashAlgorithmHeader(armor: ArmoredOutputStream, hashAlgorithm: HashAlgorithm) =
|
||||||
|
armor.addHeader(HEADER_HASH, hashAlgorithm.algorithmName)
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Add an ASCII armor comment header entry into the [ArmoredOutputStream].
|
||||||
|
*
|
||||||
|
* @param armor armored output stream
|
||||||
|
* @param comment free-text comment
|
||||||
|
*
|
||||||
|
* @see <a href="https://datatracker.ietf.org/doc/html/rfc4880#section-6.2">
|
||||||
|
* RFC 4880 - OpenPGP Message Format §6.2. Forming ASCII Armor</a>
|
||||||
|
*/
|
||||||
|
@JvmStatic
|
||||||
|
@Deprecated("Changing ASCII armor headers after ArmoredOutputStream creation is deprecated. " +
|
||||||
|
"Use ArmoredOutputStream builder instead.")
|
||||||
|
fun addCommentHeader(armor: ArmoredOutputStream, comment: String) =
|
||||||
|
armor.addHeader(HEADER_COMMENT, comment)
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Add an ASCII armor message-id header entry into the [ArmoredOutputStream].
|
||||||
|
*
|
||||||
|
* @param armor armored output stream
|
||||||
|
* @param messageId message id
|
||||||
|
*
|
||||||
|
* @see <a href="https://datatracker.ietf.org/doc/html/rfc4880#section-6.2">
|
||||||
|
* RFC 4880 - OpenPGP Message Format §6.2. Forming ASCII Armor</a>
|
||||||
|
*/
|
||||||
|
@JvmStatic
|
||||||
|
@Deprecated("Changing ASCII armor headers after ArmoredOutputStream creation is deprecated. " +
|
||||||
|
"Use ArmoredOutputStream builder instead.")
|
||||||
|
fun addMessageIdHeader(armor: ArmoredOutputStream, messageId: String) {
|
||||||
|
require(PATTER_MESSAGE_ID.matches(messageId)) { "MessageIDs MUST consist of 32 printable characters." }
|
||||||
|
armor.addHeader(HEADER_MESSAGEID, messageId)
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Extract all ASCII armor header values of type comment from the given [ArmoredInputStream].
|
||||||
|
*
|
||||||
|
* @param armor armored input stream
|
||||||
|
* @return list of comment headers
|
||||||
|
*/
|
||||||
|
@JvmStatic
|
||||||
|
fun getCommentHeaderValues(armor: ArmoredInputStream): List<String> =
|
||||||
|
getArmorHeaderValues(armor, HEADER_COMMENT)
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Extract all ASCII armor header values of type message id from the given [ArmoredInputStream].
|
||||||
|
*
|
||||||
|
* @param armor armored input stream
|
||||||
|
* @return list of message-id headers
|
||||||
|
*/
|
||||||
|
@JvmStatic
|
||||||
|
fun getMessageIdHeaderValues(armor: ArmoredInputStream): List<String> =
|
||||||
|
getArmorHeaderValues(armor, HEADER_MESSAGEID)
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Return all ASCII armor header values of type hash-algorithm from the given [ArmoredInputStream].
|
||||||
|
*
|
||||||
|
* @param armor armored input stream
|
||||||
|
* @return list of hash headers
|
||||||
|
*/
|
||||||
|
@JvmStatic
|
||||||
|
fun getHashHeaderValues(armor: ArmoredInputStream): List<String> =
|
||||||
|
getArmorHeaderValues(armor, HEADER_HASH)
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Return a list of [HashAlgorithm] enums extracted from the hash header entries of the given [ArmoredInputStream].
|
||||||
|
*
|
||||||
|
* @param armor armored input stream
|
||||||
|
* @return list of hash algorithms from the ASCII header
|
||||||
|
*/
|
||||||
|
@JvmStatic
|
||||||
|
fun getHashAlgorithms(armor: ArmoredInputStream): List<HashAlgorithm> =
|
||||||
|
getHashHeaderValues(armor).mapNotNull { HashAlgorithm.fromName(it) }
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Return all ASCII armor header values of type version from the given [ArmoredInputStream].
|
||||||
|
*
|
||||||
|
* @param armor armored input stream
|
||||||
|
* @return list of version headers
|
||||||
|
*/
|
||||||
|
@JvmStatic
|
||||||
|
fun getVersionHeaderValues(armor: ArmoredInputStream): List<String> =
|
||||||
|
getArmorHeaderValues(armor, HEADER_VERSION)
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Return all ASCII armor header values of type charset from the given [ArmoredInputStream].
|
||||||
|
*
|
||||||
|
* @param armor armored input stream
|
||||||
|
* @return list of charset headers
|
||||||
|
*/
|
||||||
|
@JvmStatic
|
||||||
|
fun getCharsetHeaderValues(armor: ArmoredInputStream): List<String> =
|
||||||
|
getArmorHeaderValues(armor, HEADER_CHARSET)
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Return all ASCII armor header values of the given headerKey from the given [ArmoredInputStream].
|
||||||
|
*
|
||||||
|
* @param armor armored input stream
|
||||||
|
* @param key ASCII armor header key
|
||||||
|
* @return list of values for the header key
|
||||||
|
*/
|
||||||
|
@JvmStatic
|
||||||
|
fun getArmorHeaderValues(armor: ArmoredInputStream, key: String): List<String> =
|
||||||
|
armor.armorHeaders
|
||||||
|
.filter { it.startsWith("$key: ") }
|
||||||
|
.map { it.substring(key.length + 2) } // key.len + ": ".len
|
||||||
|
|
||||||
|
/**
|
||||||
|
* Hacky workaround for #96.
|
||||||
|
* For `PGPPublicKeyRingCollection(InputStream, KeyFingerPrintCalculator)`
|
||||||
|
* or `PGPSecretKeyRingCollection(InputStream, KeyFingerPrintCalculator)`
|
||||||
|
* to read all PGPKeyRings properly, we apparently have to make sure that the [InputStream] that is given
|
||||||
|
* as constructor argument is a [PGPUtil.BufferedInputStreamExt].
|
||||||
|
* Since [PGPUtil.getDecoderStream] will return an [org.bouncycastle.bcpg.ArmoredInputStream]
|
||||||
|
* if the underlying input stream contains armored data, we first dearmor the data ourselves to make sure that the
|
||||||
|
* end-result is a [PGPUtil.BufferedInputStreamExt].
|
||||||
|
*
|
||||||
|
* @param inputStream input stream
|
||||||
|
* @return BufferedInputStreamExt
|
||||||
|
*
|
||||||
|
* @throws IOException in case of an IO error
|
||||||
|
*/
|
||||||
|
@JvmStatic
|
||||||
|
@Throws(IOException::class)
|
||||||
|
fun getDecoderStream(inputStream: InputStream): InputStream =
|
||||||
|
OpenPgpInputStream(inputStream).let {
|
||||||
|
if (it.isAsciiArmored) {
|
||||||
|
PGPUtil.getDecoderStream(ArmoredInputStreamFactory.get(it))
|
||||||
|
} else {
|
||||||
|
it
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
Loading…
Reference in a new issue