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/*
* Copyright (C) 2014 Dominik Schürmann <dominik@dominikschuermann.de>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.openintents.openpgp.util;
import java.util.List;
import java.util.Locale;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import android.content.Context;
import android.content.Intent;
import android.content.pm.ResolveInfo;
public class OpenPgpUtils {
public static final Pattern PGP_MESSAGE = Pattern.compile(
".*?(-----BEGIN PGP MESSAGE-----.*?-----END PGP MESSAGE-----).*",
Pattern.DOTALL);
public static final Pattern PGP_SIGNED_MESSAGE = Pattern.compile(
".*?(-----BEGIN PGP SIGNED MESSAGE-----.*?-----BEGIN PGP SIGNATURE-----.*?-----END PGP SIGNATURE-----).*",
Pattern.DOTALL);
public static final int PARSE_RESULT_NO_PGP = -1;
public static final int PARSE_RESULT_MESSAGE = 0;
public static final int PARSE_RESULT_SIGNED_MESSAGE = 1;
public static int parseMessage(String message) {
Matcher matcherSigned = PGP_SIGNED_MESSAGE.matcher(message);
Matcher matcherMessage = PGP_MESSAGE.matcher(message);
if (matcherMessage.matches()) {
return PARSE_RESULT_MESSAGE;
} else if (matcherSigned.matches()) {
return PARSE_RESULT_SIGNED_MESSAGE;
} else {
return PARSE_RESULT_NO_PGP;
}
}
public static boolean isAvailable(Context context) {
Intent intent = new Intent(OpenPgpApi.SERVICE_INTENT);
List<ResolveInfo> resInfo = context.getPackageManager().queryIntentServices(intent, 0);
if (!resInfo.isEmpty()) {
return true;
} else {
return false;
}
}
public static String convertKeyIdToHex(long keyId) {
return "0x" + convertKeyIdToHex32bit(keyId >> 32) + convertKeyIdToHex32bit(keyId);
}
private static String convertKeyIdToHex32bit(long keyId) {
String hexString = Long.toHexString(keyId & 0xffffffffL).toLowerCase(Locale.ENGLISH);
while (hexString.length() < 8) {
hexString = "0" + hexString;
}
return hexString;
}
}
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