mirror of https://github.com/M66B/FairEmail.git
146 lines
5.0 KiB
Java
146 lines
5.0 KiB
Java
/*
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* Copyright (C) 2014-2015 Dominik Schürmann <dominik@dominikschuermann.de>
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.openintents.openpgp.util;
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import java.util.List;
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import java.util.Locale;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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import android.content.Context;
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import android.content.Intent;
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import android.content.pm.ResolveInfo;
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import android.text.TextUtils;
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public class OpenPgpUtils {
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public static final Pattern PGP_MESSAGE = Pattern.compile(
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"(-----BEGIN PGP MESSAGE-----.*?-----END PGP MESSAGE-----).*",
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Pattern.DOTALL);
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public static final String PGP_MARKER_CLEARSIGN_BEGIN_MESSAGE = "-----BEGIN PGP SIGNED MESSAGE-----";
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public static final String PGP_MARKER_CLEARSIGN_BEGIN_SIGNATURE = "-----BEGIN PGP SIGNATURE-----";
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public static final Pattern PGP_SIGNED_MESSAGE = Pattern.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 final int PARSE_RESULT_NO_PGP = -1;
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public static final int PARSE_RESULT_MESSAGE = 0;
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public static final int PARSE_RESULT_SIGNED_MESSAGE = 1;
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public static int parseMessage(String message) {
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return parseMessage(message, false);
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}
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public static int parseMessage(String message, boolean anchorToStart) {
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Matcher matcherSigned = PGP_SIGNED_MESSAGE.matcher(message);
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Matcher matcherMessage = PGP_MESSAGE.matcher(message);
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if (anchorToStart ? matcherMessage.matches() : matcherMessage.find()) {
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return PARSE_RESULT_MESSAGE;
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} else if (anchorToStart ? matcherSigned.matches() : matcherSigned.find()) {
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return PARSE_RESULT_SIGNED_MESSAGE;
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} else {
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return PARSE_RESULT_NO_PGP;
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}
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}
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public static boolean isAvailable(Context context) {
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Intent intent = new Intent(OpenPgpApi.SERVICE_INTENT_2);
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List<ResolveInfo> resInfo = context.getPackageManager().queryIntentServices(intent, 0);
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return !resInfo.isEmpty();
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}
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public static String convertKeyIdToHex(long keyId) {
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return "0x" + convertKeyIdToHex32bit(keyId >> 32) + convertKeyIdToHex32bit(keyId);
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}
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private static String convertKeyIdToHex32bit(long keyId) {
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String hexString = Long.toHexString(keyId & 0xffffffffL).toLowerCase(Locale.ENGLISH);
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while (hexString.length() < 8) {
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hexString = "0" + hexString;
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}
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return hexString;
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}
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public static String extractClearsignedMessage(String text) {
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if (text == null || !text.startsWith(PGP_MARKER_CLEARSIGN_BEGIN_MESSAGE)) {
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return null;
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}
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int endOfHeader = text.indexOf("\r\n\r\n") +4;
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if (endOfHeader < 0) {
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return null;
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}
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int endOfCleartext = text.indexOf(PGP_MARKER_CLEARSIGN_BEGIN_SIGNATURE);
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if (endOfCleartext < 0) {
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endOfCleartext = text.length();
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}
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return text.substring(endOfHeader, endOfCleartext);
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}
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private static final Pattern USER_ID_PATTERN = Pattern.compile("^(.*?)(?: \\((.*)\\))?(?: <(.*)>)?$");
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/**
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* Splits userId string into naming part, email part, and comment part
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* <p/>
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* User ID matching:
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* http://fiddle.re/t4p6f
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*
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* @param userId
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* @return theParsedUserInfo
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*/
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public static UserId splitUserId(final String userId) {
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if (!TextUtils.isEmpty(userId)) {
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final Matcher matcher = USER_ID_PATTERN.matcher(userId);
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if (matcher.matches()) {
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return new UserId(matcher.group(1), matcher.group(3), matcher.group(2));
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}
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}
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return new UserId(null, null, null);
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}
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/**
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* Returns a composed user id. Returns null if name is null!
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*/
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public static String createUserId(UserId userId) {
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String userIdString = userId.name; // consider name a required value
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if (userIdString != null && !TextUtils.isEmpty(userId.comment)) {
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userIdString += " (" + userId.comment + ")";
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}
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if (userIdString != null && !TextUtils.isEmpty(userId.email)) {
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userIdString += " <" + userId.email + ">";
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}
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return userIdString;
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}
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public static class UserId {
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public final String name;
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public final String email;
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public final String comment;
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public UserId(String name, String email, String comment) {
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this.name = name;
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this.email = email;
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this.comment = comment;
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}
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}
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}
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