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/*
* Copyright (C) 2014 Dominik Schürmann <dominik@dominikschuermann.de>
*
* 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.helper;
import android.accounts.Account;
import android.accounts.AccountManager;
import android.content.*;
import android.database.Cursor;
import android.net.Uri;
import android.provider.ContactsContract;
import android.util.Patterns;
import org.sufficientlysecure.keychain.Constants;
import org.sufficientlysecure.keychain.R;
import org.sufficientlysecure.keychain.pgp.KeyRing;
import org.sufficientlysecure.keychain.pgp.PgpKeyHelper;
import org.sufficientlysecure.keychain.provider.KeychainContract;
import org.sufficientlysecure.keychain.util.Log;
import java.util.*;
public class ContactHelper {
public static final String[] KEYS_TO_CONTACT_PROJECTION = new String[]{
KeychainContract.KeyRings.USER_ID,
KeychainContract.KeyRings.FINGERPRINT,
KeychainContract.KeyRings.KEY_ID,
KeychainContract.KeyRings.MASTER_KEY_ID,
KeychainContract.KeyRings.EXPIRY,
KeychainContract.KeyRings.IS_REVOKED};
public static final String[] USER_IDS_PROJECTION = new String[]{
KeychainContract.UserIds.USER_ID
};
public static final String[] RAW_CONTACT_ID_PROJECTION = new String[]{ContactsContract.RawContacts._ID};
public static final String FIND_RAW_CONTACT_SELECTION =
ContactsContract.RawContacts.ACCOUNT_TYPE + "=? AND " + ContactsContract.RawContacts.SOURCE_ID + "=?";
public static List<String> getMailAccounts(Context context) {
final Account[] accounts = AccountManager.get(context).getAccounts();
final Set<String> emailSet = new HashSet<String>();
for (Account account : accounts) {
if (Patterns.EMAIL_ADDRESS.matcher(account.name).matches()) {
emailSet.add(account.name);
}
}
return new ArrayList<String>(emailSet);
}
public static List<String> getContactMails(Context context) {
ContentResolver resolver = context.getContentResolver();
Cursor mailCursor = resolver.query(ContactsContract.CommonDataKinds.Email.CONTENT_URI,
new String[]{ContactsContract.CommonDataKinds.Email.DATA},
null, null, null);
if (mailCursor == null) return null;
Set<String> mails = new HashSet<String>();
while (mailCursor.moveToNext()) {
String email = mailCursor.getString(0);
if (email != null) {
mails.add(email);
}
}
mailCursor.close();
return new ArrayList<String>(mails);
}
public static Uri dataUriFromContactUri(Context context, Uri contactUri) {
Cursor contactMasterKey = context.getContentResolver().query(contactUri,
new String[]{ContactsContract.Data.DATA2}, null, null, null, null);
if (contactMasterKey != null) {
if (contactMasterKey.moveToNext()) {
return KeychainContract.KeyRings.buildGenericKeyRingUri(contactMasterKey.getLong(0));
}
contactMasterKey.close();
}
return null;
}
private static ContentProviderOperation.Builder referenceRawContact(ContentProviderOperation.Builder builder,
int rawContactId) {
return rawContactId == -1 ?
builder.withValueBackReference(ContactsContract.Data.RAW_CONTACT_ID, 0) :
builder.withValue(ContactsContract.Data.RAW_CONTACT_ID, rawContactId);
}
public static void writeKeysToContacts(Context context) {
ContentResolver resolver = context.getContentResolver();
Cursor cursor = resolver.query(KeychainContract.KeyRings.buildUnifiedKeyRingsUri(), KEYS_TO_CONTACT_PROJECTION,
null, null, null);
if (cursor != null) {
while (cursor.moveToNext()) {
String[] primaryUserId = KeyRing.splitUserId(cursor.getString(0));
String fingerprint = PgpKeyHelper.convertFingerprintToHex(cursor.getBlob(1));
String keyIdShort = PgpKeyHelper.convertKeyIdToHexShort(cursor.getLong(2));
long masterKeyId = cursor.getLong(3);
boolean isExpired = !cursor.isNull(4) && new Date(cursor.getLong(4) * 1000).before(new Date());
boolean isRevoked = cursor.getInt(5) > 0;
int rawContactId = -1;
Cursor raw = resolver.query(ContactsContract.RawContacts.CONTENT_URI, RAW_CONTACT_ID_PROJECTION,
FIND_RAW_CONTACT_SELECTION, new String[]{Constants.PACKAGE_NAME, fingerprint}, null, null);
if (raw != null) {
if (raw.moveToNext()) {
rawContactId = raw.getInt(0);
}
raw.close();
}
ArrayList<ContentProviderOperation> ops = new ArrayList<ContentProviderOperation>();
if (isExpired || isRevoked) {
if (rawContactId != -1) {
resolver.delete(ContactsContract.RawContacts.CONTENT_URI,
ContactsContract.RawContacts._ID + "=?", new String[]{Integer.toString(rawContactId)});
}
} else {
if (rawContactId == -1) {
insertContact(ops, context, fingerprint);
writeContactKey(ops, context, rawContactId, masterKeyId, keyIdShort);
}
writeContactDisplayName(ops, rawContactId, primaryUserId[0]);
writeContactEmail(ops, resolver, rawContactId, masterKeyId);
try {
resolver.applyBatch(ContactsContract.AUTHORITY, ops);
} catch (Exception e) {
Log.w(Constants.TAG, e);
}
}
}
cursor.close();
}
}
private static void insertContact(ArrayList<ContentProviderOperation> ops, Context context, String fingerprint) {
ops.add(ContentProviderOperation.newInsert(ContactsContract.RawContacts.CONTENT_URI)
.withValue(ContactsContract.RawContacts.ACCOUNT_NAME, context.getString(R.string.app_name))
.withValue(ContactsContract.RawContacts.ACCOUNT_TYPE, Constants.PACKAGE_NAME)
.withValue(ContactsContract.RawContacts.SOURCE_ID, fingerprint)
.build());
}
private static void writeContactKey(ArrayList<ContentProviderOperation> ops, Context context, int rawContactId,
long masterKeyId, String keyIdShort) {
ops.add(referenceRawContact(ContentProviderOperation.newInsert(ContactsContract.Data.CONTENT_URI), rawContactId)
.withValue(ContactsContract.Data.MIMETYPE, Constants.CUSTOM_CONTACT_DATA_MIME_TYPE)
.withValue(ContactsContract.Data.DATA1, context.getString(R.string.contact_show_key, keyIdShort))
.withValue(ContactsContract.Data.DATA2, masterKeyId)
.build());
}
private static void writeContactEmail(ArrayList<ContentProviderOperation> ops, ContentResolver resolver,
int rawContactId, long masterKeyId) {
ops.add(selectByRawContactAndItemType(ContentProviderOperation.newDelete(ContactsContract.Data.CONTENT_URI),
rawContactId, ContactsContract.CommonDataKinds.Email.CONTENT_ITEM_TYPE).build());
Cursor ids = resolver.query(KeychainContract.UserIds.buildUserIdsUri(Long.toString(masterKeyId)),
USER_IDS_PROJECTION, KeychainContract.UserIds.IS_REVOKED + "=0", null, null);
if (ids != null) {
while (ids.moveToNext()) {
String[] userId = KeyRing.splitUserId(ids.getString(0));
if (userId[1] != null) {
ops.add(referenceRawContact(ContentProviderOperation.newInsert(ContactsContract.Data.CONTENT_URI),
rawContactId)
.withValue(ContactsContract.Data.MIMETYPE,
ContactsContract.CommonDataKinds.Email.CONTENT_ITEM_TYPE)
.withValue(ContactsContract.CommonDataKinds.Email.DATA, userId[1])
.build());
}
}
ids.close();
}
}
private static void writeContactDisplayName(ArrayList<ContentProviderOperation> ops, int rawContactId,
String displayName) {
if (displayName != null) {
ops.add(insertOrUpdateForRawContact(ContactsContract.Data.CONTENT_URI, rawContactId,
ContactsContract.CommonDataKinds.StructuredName.CONTENT_ITEM_TYPE)
.withValue(ContactsContract.CommonDataKinds.StructuredName.DISPLAY_NAME, displayName)
.build());
}
}
private static ContentProviderOperation.Builder insertOrUpdateForRawContact(Uri uri, int rawContactId,
String itemType) {
if (rawContactId == -1) {
return referenceRawContact(ContentProviderOperation.newInsert(uri), rawContactId).withValue(
ContactsContract.Data.MIMETYPE, itemType);
} else {
return ContentProviderOperation.newUpdate(uri).withSelection(
ContactsContract.Data.RAW_CONTACT_ID + "=? AND " + ContactsContract.Data.MIMETYPE + "=?",
new String[]{Integer.toString(rawContactId), itemType});
}
}
private static ContentProviderOperation.Builder selectByRawContactAndItemType(
ContentProviderOperation.Builder builder, int rawContactId, String itemType) {
return builder.withSelection(
ContactsContract.Data.RAW_CONTACT_ID + "=? AND " + ContactsContract.Data.MIMETYPE + "=?",
new String[]{Integer.toString(rawContactId), itemType});
}
}
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