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/*
* Copyright (C) 2014 Dominik Schürmann <dominik@dominikschuermann.de>
* Copyright (C) 2014 Vincent Breitmoser <v.breitmoser@mugenguild.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.sufficientlysecure.keychain.pgp;
import android.text.TextUtils;
import org.sufficientlysecure.keychain.pgp.exception.PgpKeyNotFoundException;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* An abstract KeyRing.
* <p/>
* This is an abstract class for all KeyRing constructs. It serves as a common
* denominator of available information, two implementations wrapping the same
* keyring should in all cases agree on the output of all methods described
* here.
*
* @see CanonicalizedKeyRing
* @see org.sufficientlysecure.keychain.provider.CachedPublicKeyRing
*/
public abstract class KeyRing {
abstract public long getMasterKeyId() throws PgpKeyNotFoundException;
abstract public String getPrimaryUserId() throws PgpKeyNotFoundException;
abstract public String getPrimaryUserIdWithFallback() throws PgpKeyNotFoundException;
public String[] getSplitPrimaryUserIdWithFallback() throws PgpKeyNotFoundException {
return splitUserId(getPrimaryUserIdWithFallback());
}
abstract public boolean isRevoked() throws PgpKeyNotFoundException;
abstract public boolean canCertify() throws PgpKeyNotFoundException;
abstract public long getEncryptId() throws PgpKeyNotFoundException;
abstract public boolean hasEncrypt() throws PgpKeyNotFoundException;
abstract public int getVerified() throws PgpKeyNotFoundException;
private static final Pattern USER_ID_PATTERN = Pattern.compile("^(.*?)(?: \\((.*)\\))?(?: <(.*)>)?$");
/**
* Splits userId string into naming part, email part, and comment part
*
* @param userId
* @return array with naming (0), email (1), comment (2)
*/
public static String[] splitUserId(String userId) {
String[] result = new String[]{null, null, null};
if (userId == null || userId.equals("")) {
return result;
}
/*
* User ID matching:
* http://fiddle.re/t4p6f
*
* test cases:
* "Max Mustermann (this is a comment) <max@example.com>"
* "Max Mustermann <max@example.com>"
* "Max Mustermann (this is a comment)"
* "Max Mustermann [this is nothing]"
*/
Matcher matcher = USER_ID_PATTERN.matcher(userId);
if (matcher.matches()) {
result[0] = matcher.group(1);
result[1] = matcher.group(3);
result[2] = matcher.group(2);
}
return result;
}
/**
* Returns a composed user id. Returns null if name is null!
*
* @param name
* @param email
* @param comment
* @return
*/
public static String createUserId(String name, String email, String comment) {
String userId = name; // consider name a required value
if (userId != null && !TextUtils.isEmpty(comment)) {
userId += " (" + comment + ")";
}
if (userId != null && !TextUtils.isEmpty(email)) {
userId += " <" + email + ">";
}
return userId;
}
}
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