Put PgpMain methods in separate opbject classes, handle passphrase dialog in EditKey not in SecretKeyList
This commit is contained in:
Dominik Schürmann
@@ -1,5 +1,5 @@
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/*
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* Copyright (C) 2012 Dominik Schürmann <dominik@dominikschuermann.de>
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* Copyright (C) 2012-2013 Dominik Schürmann <dominik@dominikschuermann.de>
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* Copyright (C) 2010 Thialfihar <thi@thialfihar.org>
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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@@ -17,494 +17,203 @@
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package org.sufficientlysecure.keychain.pgp;
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import java.util.Calendar;
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import java.util.Date;
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import java.util.GregorianCalendar;
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import java.util.Locale;
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import java.util.Vector;
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import java.io.File;
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import java.io.FileNotFoundException;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.RandomAccessFile;
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import java.security.SecureRandom;
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import java.util.Iterator;
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import java.util.regex.Pattern;
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import org.spongycastle.bcpg.sig.KeyFlags;
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import org.spongycastle.openpgp.PGPPublicKey;
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import org.spongycastle.openpgp.PGPEncryptedDataList;
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import org.spongycastle.openpgp.PGPObjectFactory;
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import org.spongycastle.openpgp.PGPPublicKeyEncryptedData;
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import org.spongycastle.openpgp.PGPPublicKeyRing;
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import org.spongycastle.openpgp.PGPSecretKey;
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import org.spongycastle.openpgp.PGPSecretKeyRing;
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import org.spongycastle.openpgp.PGPSignature;
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import org.spongycastle.openpgp.PGPSignatureSubpacketVector;
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import org.spongycastle.openpgp.PGPUtil;
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import org.sufficientlysecure.keychain.Constants;
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import org.sufficientlysecure.keychain.Id;
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import org.sufficientlysecure.keychain.R;
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import org.sufficientlysecure.keychain.pgp.exception.NoAsymmetricEncryptionException;
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import org.sufficientlysecure.keychain.pgp.exception.PgpGeneralException;
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import org.sufficientlysecure.keychain.provider.ProviderHelper;
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import org.sufficientlysecure.keychain.util.IterableIterator;
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import org.sufficientlysecure.keychain.util.Log;
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import org.sufficientlysecure.keychain.util.ProgressDialogUpdater;
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import android.content.Context;
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import android.content.pm.PackageInfo;
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import android.content.pm.PackageManager.NameNotFoundException;
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public class PgpHelper {
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public static Date getCreationDate(PGPPublicKey key) {
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return key.getCreationTime();
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public static Pattern PGP_MESSAGE = Pattern.compile(
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".*?(-----BEGIN PGP MESSAGE-----.*?-----END PGP MESSAGE-----).*", Pattern.DOTALL);
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public static Pattern PGP_SIGNED_MESSAGE = Pattern
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.compile(
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".*?(-----BEGIN PGP SIGNED MESSAGE-----.*?-----BEGIN PGP SIGNATURE-----.*?-----END PGP SIGNATURE-----).*",
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Pattern.DOTALL);
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public static Pattern PGP_PUBLIC_KEY = Pattern.compile(
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".*?(-----BEGIN PGP PUBLIC KEY BLOCK-----.*?-----END PGP PUBLIC KEY BLOCK-----).*",
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Pattern.DOTALL);
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public static String getVersion(Context context) {
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String version = null;
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try {
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PackageInfo pi = context.getPackageManager().getPackageInfo(Constants.PACKAGE_NAME, 0);
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version = pi.versionName;
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return version;
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} catch (NameNotFoundException e) {
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Log.e(Constants.TAG, "Version could not be retrieved!", e);
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return "0.0.0";
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}
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}
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public static Date getCreationDate(PGPSecretKey key) {
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return key.getPublicKey().getCreationTime();
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public static String getFullVersion(Context context) {
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return "OpenPGP Keychain v" + getVersion(context);
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}
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@SuppressWarnings("unchecked")
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public static PGPPublicKey getMasterKey(PGPPublicKeyRing keyRing) {
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if (keyRing == null) {
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return null;
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}
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for (PGPPublicKey key : new IterableIterator<PGPPublicKey>(keyRing.getPublicKeys())) {
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if (key.isMasterKey()) {
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return key;
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}
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public static long getDecryptionKeyId(Context context, InputStream inputStream)
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throws PgpGeneralException, NoAsymmetricEncryptionException, IOException {
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InputStream in = PGPUtil.getDecoderStream(inputStream);
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PGPObjectFactory pgpF = new PGPObjectFactory(in);
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PGPEncryptedDataList enc;
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Object o = pgpF.nextObject();
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// the first object might be a PGP marker packet.
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if (o instanceof PGPEncryptedDataList) {
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enc = (PGPEncryptedDataList) o;
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} else {
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enc = (PGPEncryptedDataList) pgpF.nextObject();
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}
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return null;
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}
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@SuppressWarnings("unchecked")
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public static PGPSecretKey getMasterKey(PGPSecretKeyRing keyRing) {
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if (keyRing == null) {
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return null;
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}
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for (PGPSecretKey key : new IterableIterator<PGPSecretKey>(keyRing.getSecretKeys())) {
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if (key.isMasterKey()) {
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return key;
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}
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if (enc == null) {
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throw new PgpGeneralException(context.getString(R.string.error_invalidData));
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}
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return null;
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}
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@SuppressWarnings("unchecked")
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public static PGPSecretKey getKeyNum(PGPSecretKeyRing keyRing, long num) {
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long cnt = 0;
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if (keyRing == null) {
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return null;
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}
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for (PGPSecretKey key : new IterableIterator<PGPSecretKey>(keyRing.getSecretKeys())) {
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if (cnt == num) {
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return key;
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}
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cnt++;
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}
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return null;
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}
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@SuppressWarnings("unchecked")
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public static Vector<PGPPublicKey> getEncryptKeys(PGPPublicKeyRing keyRing) {
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Vector<PGPPublicKey> encryptKeys = new Vector<PGPPublicKey>();
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for (PGPPublicKey key : new IterableIterator<PGPPublicKey>(keyRing.getPublicKeys())) {
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if (isEncryptionKey(key)) {
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encryptKeys.add(key);
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}
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}
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return encryptKeys;
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}
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@SuppressWarnings("unchecked")
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public static Vector<PGPSecretKey> getSigningKeys(PGPSecretKeyRing keyRing) {
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Vector<PGPSecretKey> signingKeys = new Vector<PGPSecretKey>();
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for (PGPSecretKey key : new IterableIterator<PGPSecretKey>(keyRing.getSecretKeys())) {
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if (isSigningKey(key)) {
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signingKeys.add(key);
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}
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}
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return signingKeys;
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}
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@SuppressWarnings("unchecked")
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public static Vector<PGPSecretKey> getCertificationKeys(PGPSecretKeyRing keyRing) {
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Vector<PGPSecretKey> signingKeys = new Vector<PGPSecretKey>();
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for (PGPSecretKey key : new IterableIterator<PGPSecretKey>(keyRing.getSecretKeys())) {
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if (isCertificationKey(key)) {
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signingKeys.add(key);
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}
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}
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return signingKeys;
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}
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public static Vector<PGPPublicKey> getUsableEncryptKeys(PGPPublicKeyRing keyRing) {
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Vector<PGPPublicKey> usableKeys = new Vector<PGPPublicKey>();
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Vector<PGPPublicKey> encryptKeys = getEncryptKeys(keyRing);
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PGPPublicKey masterKey = null;
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for (int i = 0; i < encryptKeys.size(); ++i) {
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PGPPublicKey key = encryptKeys.get(i);
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if (!isExpired(key)) {
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if (key.isMasterKey()) {
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masterKey = key;
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} else {
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usableKeys.add(key);
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// TODO: currently we always only look at the first known key
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// find the secret key
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PGPSecretKey secretKey = null;
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Iterator<?> it = enc.getEncryptedDataObjects();
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boolean gotAsymmetricEncryption = false;
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while (it.hasNext()) {
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Object obj = it.next();
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if (obj instanceof PGPPublicKeyEncryptedData) {
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gotAsymmetricEncryption = true;
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PGPPublicKeyEncryptedData pbe = (PGPPublicKeyEncryptedData) obj;
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secretKey = ProviderHelper.getPGPSecretKeyByKeyId(context, pbe.getKeyID());
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if (secretKey != null) {
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break;
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}
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}
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}
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if (masterKey != null) {
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usableKeys.add(masterKey);
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}
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return usableKeys;
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}
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public static boolean isExpired(PGPPublicKey key) {
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Date creationDate = getCreationDate(key);
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Date expiryDate = getExpiryDate(key);
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Date now = new Date();
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if (now.compareTo(creationDate) >= 0
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&& (expiryDate == null || now.compareTo(expiryDate) <= 0)) {
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return false;
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}
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return true;
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}
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public static boolean isExpired(PGPSecretKey key) {
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return isExpired(key.getPublicKey());
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}
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public static Vector<PGPSecretKey> getUsableCertificationKeys(PGPSecretKeyRing keyRing) {
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Vector<PGPSecretKey> usableKeys = new Vector<PGPSecretKey>();
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Vector<PGPSecretKey> signingKeys = getCertificationKeys(keyRing);
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PGPSecretKey masterKey = null;
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for (int i = 0; i < signingKeys.size(); ++i) {
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PGPSecretKey key = signingKeys.get(i);
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if (key.isMasterKey()) {
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masterKey = key;
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} else {
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usableKeys.add(key);
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}
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}
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if (masterKey != null) {
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usableKeys.add(masterKey);
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}
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return usableKeys;
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}
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public static Vector<PGPSecretKey> getUsableSigningKeys(PGPSecretKeyRing keyRing) {
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Vector<PGPSecretKey> usableKeys = new Vector<PGPSecretKey>();
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Vector<PGPSecretKey> signingKeys = getSigningKeys(keyRing);
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PGPSecretKey masterKey = null;
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for (int i = 0; i < signingKeys.size(); ++i) {
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PGPSecretKey key = signingKeys.get(i);
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if (key.isMasterKey()) {
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masterKey = key;
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} else {
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usableKeys.add(key);
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}
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}
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if (masterKey != null) {
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usableKeys.add(masterKey);
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}
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return usableKeys;
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}
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public static Date getExpiryDate(PGPPublicKey key) {
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Date creationDate = getCreationDate(key);
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if (key.getValidDays() == 0) {
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// no expiry
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return null;
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}
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Calendar calendar = GregorianCalendar.getInstance();
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calendar.setTime(creationDate);
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calendar.add(Calendar.DATE, key.getValidDays());
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Date expiryDate = calendar.getTime();
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return expiryDate;
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}
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public static Date getExpiryDate(PGPSecretKey key) {
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return getExpiryDate(key.getPublicKey());
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}
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public static PGPPublicKey getEncryptPublicKey(Context context, long masterKeyId) {
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PGPPublicKeyRing keyRing = ProviderHelper.getPGPPublicKeyRingByMasterKeyId(context,
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masterKeyId);
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if (keyRing == null) {
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Log.e(Constants.TAG, "keyRing is null!");
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return null;
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}
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Vector<PGPPublicKey> encryptKeys = getUsableEncryptKeys(keyRing);
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if (encryptKeys.size() == 0) {
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Log.e(Constants.TAG, "encryptKeys is null!");
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return null;
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}
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return encryptKeys.get(0);
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}
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public static PGPSecretKey getCertificationKey(Context context, long masterKeyId) {
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PGPSecretKeyRing keyRing = ProviderHelper.getPGPSecretKeyRingByMasterKeyId(context,
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masterKeyId);
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if (keyRing == null) {
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return null;
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}
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Vector<PGPSecretKey> signingKeys = getUsableCertificationKeys(keyRing);
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if (signingKeys.size() == 0) {
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return null;
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}
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return signingKeys.get(0);
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}
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public static PGPSecretKey getSigningKey(Context context, long masterKeyId) {
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PGPSecretKeyRing keyRing = ProviderHelper.getPGPSecretKeyRingByMasterKeyId(context,
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masterKeyId);
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if (keyRing == null) {
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return null;
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}
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Vector<PGPSecretKey> signingKeys = getUsableSigningKeys(keyRing);
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if (signingKeys.size() == 0) {
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return null;
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}
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return signingKeys.get(0);
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}
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@SuppressWarnings("unchecked")
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public static String getMainUserId(PGPPublicKey key) {
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for (String userId : new IterableIterator<String>(key.getUserIDs())) {
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return userId;
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}
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return null;
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}
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@SuppressWarnings("unchecked")
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public static String getMainUserId(PGPSecretKey key) {
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for (String userId : new IterableIterator<String>(key.getUserIDs())) {
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return userId;
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}
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return null;
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}
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public static String getMainUserIdSafe(Context context, PGPPublicKey key) {
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String userId = getMainUserId(key);
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if (userId == null || userId.equals("")) {
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userId = context.getString(R.string.unknownUserId);
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}
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return userId;
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}
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public static String getMainUserIdSafe(Context context, PGPSecretKey key) {
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String userId = getMainUserId(key);
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if (userId == null || userId.equals("")) {
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userId = context.getString(R.string.unknownUserId);
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}
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return userId;
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}
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@SuppressWarnings("unchecked")
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public static boolean isEncryptionKey(PGPPublicKey key) {
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if (!key.isEncryptionKey()) {
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return false;
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if (!gotAsymmetricEncryption) {
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throw new NoAsymmetricEncryptionException();
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}
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if (key.getVersion() <= 3) {
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// this must be true now
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return key.isEncryptionKey();
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}
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// special cases
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if (key.getAlgorithm() == PGPPublicKey.ELGAMAL_ENCRYPT) {
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return true;
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}
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if (key.getAlgorithm() == PGPPublicKey.RSA_ENCRYPT) {
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return true;
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}
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for (PGPSignature sig : new IterableIterator<PGPSignature>(key.getSignatures())) {
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if (key.isMasterKey() && sig.getKeyID() != key.getKeyID()) {
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continue;
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}
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PGPSignatureSubpacketVector hashed = sig.getHashedSubPackets();
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if (hashed != null
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&& (hashed.getKeyFlags() & (KeyFlags.ENCRYPT_COMMS | KeyFlags.ENCRYPT_STORAGE)) != 0) {
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return true;
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}
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PGPSignatureSubpacketVector unhashed = sig.getUnhashedSubPackets();
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if (unhashed != null
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&& (unhashed.getKeyFlags() & (KeyFlags.ENCRYPT_COMMS | KeyFlags.ENCRYPT_STORAGE)) != 0) {
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return true;
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}
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}
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return false;
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}
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public static boolean isEncryptionKey(PGPSecretKey key) {
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return isEncryptionKey(key.getPublicKey());
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}
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@SuppressWarnings("unchecked")
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public static boolean isSigningKey(PGPPublicKey key) {
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if (key.getVersion() <= 3) {
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return true;
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}
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// special case
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if (key.getAlgorithm() == PGPPublicKey.RSA_SIGN) {
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return true;
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}
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for (PGPSignature sig : new IterableIterator<PGPSignature>(key.getSignatures())) {
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if (key.isMasterKey() && sig.getKeyID() != key.getKeyID()) {
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continue;
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}
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PGPSignatureSubpacketVector hashed = sig.getHashedSubPackets();
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if (hashed != null && (hashed.getKeyFlags() & KeyFlags.SIGN_DATA) != 0) {
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return true;
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}
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PGPSignatureSubpacketVector unhashed = sig.getUnhashedSubPackets();
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if (unhashed != null && (unhashed.getKeyFlags() & KeyFlags.SIGN_DATA) != 0) {
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return true;
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}
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}
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return false;
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}
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public static boolean isSigningKey(PGPSecretKey key) {
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return isSigningKey(key.getPublicKey());
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}
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@SuppressWarnings("unchecked")
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public static boolean isCertificationKey(PGPPublicKey key) {
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if (key.getVersion() <= 3) {
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return true;
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}
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for (PGPSignature sig : new IterableIterator<PGPSignature>(key.getSignatures())) {
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if (key.isMasterKey() && sig.getKeyID() != key.getKeyID()) {
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continue;
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}
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PGPSignatureSubpacketVector hashed = sig.getHashedSubPackets();
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if (hashed != null && (hashed.getKeyFlags() & KeyFlags.CERTIFY_OTHER) != 0) {
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return true;
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}
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PGPSignatureSubpacketVector unhashed = sig.getUnhashedSubPackets();
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if (unhashed != null && (unhashed.getKeyFlags() & KeyFlags.CERTIFY_OTHER) != 0) {
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return true;
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}
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}
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return false;
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}
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public static boolean isCertificationKey(PGPSecretKey key) {
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return isCertificationKey(key.getPublicKey());
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}
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public static String getAlgorithmInfo(PGPPublicKey key) {
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return getAlgorithmInfo(key.getAlgorithm(), key.getBitStrength());
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}
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public static String getAlgorithmInfo(PGPSecretKey key) {
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return getAlgorithmInfo(key.getPublicKey());
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}
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public static String getAlgorithmInfo(int algorithm, int keySize) {
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String algorithmStr = null;
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switch (algorithm) {
|
||||
case PGPPublicKey.RSA_ENCRYPT:
|
||||
case PGPPublicKey.RSA_GENERAL:
|
||||
case PGPPublicKey.RSA_SIGN: {
|
||||
algorithmStr = "RSA";
|
||||
break;
|
||||
}
|
||||
|
||||
case PGPPublicKey.DSA: {
|
||||
algorithmStr = "DSA";
|
||||
break;
|
||||
}
|
||||
|
||||
case PGPPublicKey.ELGAMAL_ENCRYPT:
|
||||
case PGPPublicKey.ELGAMAL_GENERAL: {
|
||||
algorithmStr = "ElGamal";
|
||||
break;
|
||||
}
|
||||
|
||||
default: {
|
||||
algorithmStr = "???";
|
||||
break;
|
||||
}
|
||||
}
|
||||
return algorithmStr + ", " + keySize + "bit";
|
||||
}
|
||||
|
||||
public static String convertFingerprintToHex(byte[] fp) {
|
||||
String fingerPrint = "";
|
||||
for (int i = 0; i < fp.length; ++i) {
|
||||
if (i != 0 && i % 10 == 0) {
|
||||
fingerPrint += " ";
|
||||
} else if (i != 0 && i % 2 == 0) {
|
||||
fingerPrint += " ";
|
||||
}
|
||||
String chunk = Integer.toHexString((fp[i] + 256) % 256).toUpperCase(Locale.US);
|
||||
while (chunk.length() < 2) {
|
||||
chunk = "0" + chunk;
|
||||
}
|
||||
fingerPrint += chunk;
|
||||
}
|
||||
|
||||
return fingerPrint;
|
||||
|
||||
}
|
||||
|
||||
public static String getFingerPrint(Context context, long keyId) {
|
||||
PGPPublicKey key = ProviderHelper.getPGPPublicKeyByKeyId(context, keyId);
|
||||
// if it is no public key get it from your own keys...
|
||||
if (key == null) {
|
||||
PGPSecretKey secretKey = ProviderHelper.getPGPSecretKeyByKeyId(context, keyId);
|
||||
if (secretKey == null) {
|
||||
Log.e(Constants.TAG, "Key could not be found!");
|
||||
return null;
|
||||
}
|
||||
key = secretKey.getPublicKey();
|
||||
}
|
||||
|
||||
return convertFingerprintToHex(key.getFingerprint());
|
||||
}
|
||||
|
||||
public static boolean isSecretKeyPrivateEmpty(PGPSecretKey secretKey) {
|
||||
return secretKey.isPrivateKeyEmpty();
|
||||
}
|
||||
|
||||
public static boolean isSecretKeyPrivateEmpty(Context context, long keyId) {
|
||||
PGPSecretKey secretKey = ProviderHelper.getPGPSecretKeyByKeyId(context, keyId);
|
||||
if (secretKey == null) {
|
||||
Log.e(Constants.TAG, "Key could not be found!");
|
||||
return false; // could be a public key, assume it is not empty
|
||||
return Id.key.none;
|
||||
}
|
||||
return isSecretKeyPrivateEmpty(secretKey);
|
||||
|
||||
return secretKey.getKeyID();
|
||||
}
|
||||
|
||||
public static String getSmallFingerPrint(long keyId) {
|
||||
String fingerPrint = Long.toHexString(keyId & 0xffffffffL).toUpperCase(Locale.US);
|
||||
while (fingerPrint.length() < 8) {
|
||||
fingerPrint = "0" + fingerPrint;
|
||||
public static int getStreamContent(Context context, InputStream inStream) throws IOException {
|
||||
InputStream in = PGPUtil.getDecoderStream(inStream);
|
||||
PGPObjectFactory pgpF = new PGPObjectFactory(in);
|
||||
Object object = pgpF.nextObject();
|
||||
while (object != null) {
|
||||
if (object instanceof PGPPublicKeyRing || object instanceof PGPSecretKeyRing) {
|
||||
return Id.content.keys;
|
||||
} else if (object instanceof PGPEncryptedDataList) {
|
||||
return Id.content.encrypted_data;
|
||||
}
|
||||
object = pgpF.nextObject();
|
||||
}
|
||||
return fingerPrint;
|
||||
|
||||
return Id.content.unknown;
|
||||
}
|
||||
|
||||
public static String keyToHex(long keyId) {
|
||||
return getSmallFingerPrint(keyId >> 32) + getSmallFingerPrint(keyId);
|
||||
/**
|
||||
* Generate a random filename
|
||||
*
|
||||
* @param length
|
||||
* @return
|
||||
*/
|
||||
public static String generateRandomFilename(int length) {
|
||||
SecureRandom random = new SecureRandom();
|
||||
|
||||
byte bytes[] = new byte[length];
|
||||
random.nextBytes(bytes);
|
||||
String result = "";
|
||||
for (int i = 0; i < length; ++i) {
|
||||
int v = (bytes[i] + 256) % 64;
|
||||
if (v < 10) {
|
||||
result += (char) ('0' + v);
|
||||
} else if (v < 36) {
|
||||
result += (char) ('A' + v - 10);
|
||||
} else if (v < 62) {
|
||||
result += (char) ('a' + v - 36);
|
||||
} else if (v == 62) {
|
||||
result += '_';
|
||||
} else if (v == 63) {
|
||||
result += '.';
|
||||
}
|
||||
}
|
||||
return result;
|
||||
}
|
||||
|
||||
public static long keyFromHex(String data) {
|
||||
int len = data.length();
|
||||
String s2 = data.substring(len - 8);
|
||||
String s1 = data.substring(0, len - 8);
|
||||
return (Long.parseLong(s1, 16) << 32) | Long.parseLong(s2, 16);
|
||||
/**
|
||||
* Go once through stream to get length of stream. The length is later used to display progress
|
||||
* when encrypting/decrypting
|
||||
*
|
||||
* @param in
|
||||
* @return
|
||||
* @throws IOException
|
||||
*/
|
||||
public static long getLengthOfStream(InputStream in) throws IOException {
|
||||
long size = 0;
|
||||
long n = 0;
|
||||
byte dummy[] = new byte[0x10000];
|
||||
while ((n = in.read(dummy)) > 0) {
|
||||
size += n;
|
||||
}
|
||||
return size;
|
||||
}
|
||||
|
||||
/**
|
||||
* Deletes file securely by overwriting it with random data before deleting it.
|
||||
*
|
||||
* TODO: Does this really help on flash storage?
|
||||
*
|
||||
* @param context
|
||||
* @param progress
|
||||
* @param file
|
||||
* @throws FileNotFoundException
|
||||
* @throws IOException
|
||||
*/
|
||||
public static void deleteFileSecurely(Context context, ProgressDialogUpdater progress, File file)
|
||||
throws FileNotFoundException, IOException {
|
||||
long length = file.length();
|
||||
SecureRandom random = new SecureRandom();
|
||||
RandomAccessFile raf = new RandomAccessFile(file, "rws");
|
||||
raf.seek(0);
|
||||
raf.getFilePointer();
|
||||
byte[] data = new byte[1 << 16];
|
||||
int pos = 0;
|
||||
String msg = context.getString(R.string.progress_deletingSecurely, file.getName());
|
||||
while (pos < length) {
|
||||
if (progress != null)
|
||||
progress.setProgress(msg, (int) (100 * pos / length), 100);
|
||||
random.nextBytes(data);
|
||||
raf.write(data);
|
||||
pos += data.length;
|
||||
}
|
||||
raf.close();
|
||||
file.delete();
|
||||
}
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user