386 lines
13 KiB
Java
386 lines
13 KiB
Java
package eu.siacs.conversations.crypto;
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import java.io.ByteArrayInputStream;
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import java.io.ByteArrayOutputStream;
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import java.io.FileInputStream;
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import java.io.FileNotFoundException;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.OutputStream;
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import org.openintents.openpgp.OpenPgpError;
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import org.openintents.openpgp.OpenPgpSignatureResult;
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import org.openintents.openpgp.util.OpenPgpApi;
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import org.openintents.openpgp.util.OpenPgpApi.IOpenPgpCallback;
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import eu.siacs.conversations.Config;
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import eu.siacs.conversations.R;
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import eu.siacs.conversations.entities.Account;
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import eu.siacs.conversations.entities.Contact;
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import eu.siacs.conversations.entities.Conversation;
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import eu.siacs.conversations.entities.DownloadableFile;
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import eu.siacs.conversations.entities.Message;
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import eu.siacs.conversations.services.XmppConnectionService;
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import eu.siacs.conversations.ui.UiCallback;
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import android.app.PendingIntent;
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import android.content.Intent;
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import android.graphics.BitmapFactory;
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import android.util.Log;
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public class PgpEngine {
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private OpenPgpApi api;
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private XmppConnectionService mXmppConnectionService;
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public PgpEngine(OpenPgpApi api, XmppConnectionService service) {
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this.api = api;
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this.mXmppConnectionService = service;
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}
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public void decrypt(final Message message,
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final UiCallback<Message> callback) {
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Log.d(Config.LOGTAG, "decrypting message " + message.getUuid());
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Intent params = new Intent();
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params.setAction(OpenPgpApi.ACTION_DECRYPT_VERIFY);
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params.putExtra(OpenPgpApi.EXTRA_ACCOUNT_NAME, message
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.getConversation().getAccount().getJid());
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if (message.getType() == Message.TYPE_TEXT) {
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InputStream is = new ByteArrayInputStream(message.getBody()
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.getBytes());
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final OutputStream os = new ByteArrayOutputStream();
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api.executeApiAsync(params, is, os, new IOpenPgpCallback() {
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@Override
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public void onReturn(Intent result) {
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switch (result.getIntExtra(OpenPgpApi.RESULT_CODE,
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OpenPgpApi.RESULT_CODE_ERROR)) {
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case OpenPgpApi.RESULT_CODE_SUCCESS:
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try {
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os.flush();
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if (message.getEncryption() == Message.ENCRYPTION_PGP) {
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message.setBody(os.toString());
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message.setEncryption(Message.ENCRYPTION_DECRYPTED);
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callback.success(message);
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}
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} catch (IOException e) {
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callback.error(R.string.openpgp_error, message);
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return;
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}
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return;
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case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED:
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callback.userInputRequried((PendingIntent) result
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.getParcelableExtra(OpenPgpApi.RESULT_INTENT),
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message);
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return;
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case OpenPgpApi.RESULT_CODE_ERROR:
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OpenPgpError error = result
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.getParcelableExtra(OpenPgpApi.RESULT_ERROR);
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Log.d(Config.LOGTAG,
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"openpgp error: " + error.getMessage());
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callback.error(R.string.openpgp_error, message);
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return;
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default:
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return;
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}
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}
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});
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} else if (message.getType() == Message.TYPE_IMAGE) {
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try {
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final DownloadableFile inputFile = this.mXmppConnectionService
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.getFileBackend().getFile(message, false);
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final DownloadableFile outputFile = this.mXmppConnectionService
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.getFileBackend().getFile(message, true);
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outputFile.createNewFile();
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InputStream is = new FileInputStream(inputFile);
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OutputStream os = new FileOutputStream(outputFile);
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api.executeApiAsync(params, is, os, new IOpenPgpCallback() {
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@Override
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public void onReturn(Intent result) {
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switch (result.getIntExtra(OpenPgpApi.RESULT_CODE,
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OpenPgpApi.RESULT_CODE_ERROR)) {
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case OpenPgpApi.RESULT_CODE_SUCCESS:
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BitmapFactory.Options options = new BitmapFactory.Options();
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options.inJustDecodeBounds = true;
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BitmapFactory.decodeFile(
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outputFile.getAbsolutePath(), options);
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int imageHeight = options.outHeight;
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int imageWidth = options.outWidth;
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message.setBody(Long.toString(outputFile.getSize())
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+ ',' + imageWidth + ',' + imageHeight);
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message.setEncryption(Message.ENCRYPTION_DECRYPTED);
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PgpEngine.this.mXmppConnectionService
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.updateMessage(message);
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;
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callback.success(message);
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return;
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case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED:
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callback.userInputRequried(
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(PendingIntent) result
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.getParcelableExtra(OpenPgpApi.RESULT_INTENT),
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message);
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return;
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case OpenPgpApi.RESULT_CODE_ERROR:
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callback.error(R.string.openpgp_error, message);
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return;
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default:
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return;
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}
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}
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});
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} catch (FileNotFoundException e) {
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callback.error(R.string.error_decrypting_file, message);
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} catch (IOException e) {
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callback.error(R.string.error_decrypting_file, message);
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}
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}
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}
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public void encrypt(final Message message,
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final UiCallback<Message> callback) {
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Intent params = new Intent();
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params.setAction(OpenPgpApi.ACTION_ENCRYPT);
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if (message.getConversation().getMode() == Conversation.MODE_SINGLE) {
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long[] keys = { message.getConversation().getContact()
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.getPgpKeyId() };
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params.putExtra(OpenPgpApi.EXTRA_KEY_IDS, keys);
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} else {
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params.putExtra(OpenPgpApi.EXTRA_KEY_IDS, message.getConversation()
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.getMucOptions().getPgpKeyIds());
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}
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params.putExtra(OpenPgpApi.EXTRA_ACCOUNT_NAME, message
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.getConversation().getAccount().getJid());
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if (message.getType() == Message.TYPE_TEXT) {
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params.putExtra(OpenPgpApi.EXTRA_REQUEST_ASCII_ARMOR, true);
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InputStream is = new ByteArrayInputStream(message.getBody()
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.getBytes());
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final OutputStream os = new ByteArrayOutputStream();
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api.executeApiAsync(params, is, os, new IOpenPgpCallback() {
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@Override
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public void onReturn(Intent result) {
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switch (result.getIntExtra(OpenPgpApi.RESULT_CODE,
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OpenPgpApi.RESULT_CODE_ERROR)) {
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case OpenPgpApi.RESULT_CODE_SUCCESS:
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try {
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os.flush();
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StringBuilder encryptedMessageBody = new StringBuilder();
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String[] lines = os.toString().split("\n");
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for (int i = 2; i < lines.length - 1; ++i) {
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if (!lines[i].contains("Version")) {
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encryptedMessageBody.append(lines[i].trim());
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}
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}
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message.setEncryptedBody(encryptedMessageBody
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.toString());
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callback.success(message);
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} catch (IOException e) {
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callback.error(R.string.openpgp_error, message);
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}
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break;
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case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED:
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callback.userInputRequried((PendingIntent) result
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.getParcelableExtra(OpenPgpApi.RESULT_INTENT),
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message);
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break;
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case OpenPgpApi.RESULT_CODE_ERROR:
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callback.error(R.string.openpgp_error, message);
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break;
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}
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}
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});
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} else if (message.getType() == Message.TYPE_IMAGE) {
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try {
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DownloadableFile inputFile = this.mXmppConnectionService
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.getFileBackend().getFile(message, true);
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DownloadableFile outputFile = this.mXmppConnectionService
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.getFileBackend().getFile(message, false);
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outputFile.createNewFile();
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InputStream is = new FileInputStream(inputFile);
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OutputStream os = new FileOutputStream(outputFile);
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api.executeApiAsync(params, is, os, new IOpenPgpCallback() {
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@Override
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public void onReturn(Intent result) {
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switch (result.getIntExtra(OpenPgpApi.RESULT_CODE,
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OpenPgpApi.RESULT_CODE_ERROR)) {
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case OpenPgpApi.RESULT_CODE_SUCCESS:
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callback.success(message);
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break;
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case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED:
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callback.userInputRequried(
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(PendingIntent) result
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.getParcelableExtra(OpenPgpApi.RESULT_INTENT),
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message);
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break;
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case OpenPgpApi.RESULT_CODE_ERROR:
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callback.error(R.string.openpgp_error, message);
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break;
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}
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}
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});
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} catch (FileNotFoundException e) {
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Log.d(Config.LOGTAG, "file not found: " + e.getMessage());
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} catch (IOException e) {
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Log.d(Config.LOGTAG, "io exception during file encrypt");
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}
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}
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}
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public long fetchKeyId(Account account, String status, String signature) {
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if ((signature == null) || (api == null)) {
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return 0;
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}
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if (status == null) {
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status = "";
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}
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StringBuilder pgpSig = new StringBuilder();
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pgpSig.append("-----BEGIN PGP SIGNED MESSAGE-----");
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pgpSig.append('\n');
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pgpSig.append('\n');
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pgpSig.append(status);
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pgpSig.append('\n');
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pgpSig.append("-----BEGIN PGP SIGNATURE-----");
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pgpSig.append('\n');
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pgpSig.append('\n');
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pgpSig.append(signature.replace("\n", "").trim());
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pgpSig.append('\n');
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pgpSig.append("-----END PGP SIGNATURE-----");
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Intent params = new Intent();
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params.setAction(OpenPgpApi.ACTION_DECRYPT_VERIFY);
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params.putExtra(OpenPgpApi.EXTRA_REQUEST_ASCII_ARMOR, true);
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params.putExtra(OpenPgpApi.EXTRA_ACCOUNT_NAME, account.getJid());
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InputStream is = new ByteArrayInputStream(pgpSig.toString().getBytes());
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ByteArrayOutputStream os = new ByteArrayOutputStream();
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Intent result = api.executeApi(params, is, os);
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switch (result.getIntExtra(OpenPgpApi.RESULT_CODE,
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OpenPgpApi.RESULT_CODE_ERROR)) {
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case OpenPgpApi.RESULT_CODE_SUCCESS:
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OpenPgpSignatureResult sigResult = result
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.getParcelableExtra(OpenPgpApi.RESULT_SIGNATURE);
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if (sigResult != null) {
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return sigResult.getKeyId();
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} else {
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return 0;
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}
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case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED:
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return 0;
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case OpenPgpApi.RESULT_CODE_ERROR:
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Log.d(Config.LOGTAG,
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"openpgp error: "
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+ ((OpenPgpError) result
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.getParcelableExtra(OpenPgpApi.RESULT_ERROR))
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.getMessage());
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return 0;
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}
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return 0;
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}
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public void generateSignature(final Account account, String status,
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final UiCallback<Account> callback) {
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Intent params = new Intent();
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params.putExtra(OpenPgpApi.EXTRA_REQUEST_ASCII_ARMOR, true);
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params.setAction(OpenPgpApi.ACTION_SIGN);
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params.putExtra(OpenPgpApi.EXTRA_ACCOUNT_NAME, account.getJid());
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InputStream is = new ByteArrayInputStream(status.getBytes());
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final OutputStream os = new ByteArrayOutputStream();
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api.executeApiAsync(params, is, os, new IOpenPgpCallback() {
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@Override
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public void onReturn(Intent result) {
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switch (result.getIntExtra(OpenPgpApi.RESULT_CODE, 0)) {
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case OpenPgpApi.RESULT_CODE_SUCCESS:
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StringBuilder signatureBuilder = new StringBuilder();
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try {
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os.flush();
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String[] lines = os.toString().split("\n");
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boolean sig = false;
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for (String line : lines) {
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if (sig) {
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if (line.contains("END PGP SIGNATURE")) {
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sig = false;
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} else {
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if (!line.contains("Version")) {
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signatureBuilder.append(line.trim());
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}
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}
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}
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if (line.contains("BEGIN PGP SIGNATURE")) {
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sig = true;
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}
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}
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} catch (IOException e) {
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callback.error(R.string.openpgp_error, account);
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return;
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}
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account.setKey("pgp_signature", signatureBuilder.toString());
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callback.success(account);
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return;
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case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED:
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callback.userInputRequried((PendingIntent) result
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.getParcelableExtra(OpenPgpApi.RESULT_INTENT),
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account);
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return;
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case OpenPgpApi.RESULT_CODE_ERROR:
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callback.error(R.string.openpgp_error, account);
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return;
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}
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}
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});
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}
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public void hasKey(final Contact contact, final UiCallback<Contact> callback) {
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Intent params = new Intent();
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params.setAction(OpenPgpApi.ACTION_GET_KEY);
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params.putExtra(OpenPgpApi.EXTRA_KEY_ID, contact.getPgpKeyId());
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params.putExtra(OpenPgpApi.EXTRA_ACCOUNT_NAME, contact.getAccount()
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.getJid());
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api.executeApiAsync(params, null, null, new IOpenPgpCallback() {
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@Override
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public void onReturn(Intent result) {
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switch (result.getIntExtra(OpenPgpApi.RESULT_CODE, 0)) {
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case OpenPgpApi.RESULT_CODE_SUCCESS:
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callback.success(contact);
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return;
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case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED:
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callback.userInputRequried((PendingIntent) result
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.getParcelableExtra(OpenPgpApi.RESULT_INTENT),
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contact);
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return;
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case OpenPgpApi.RESULT_CODE_ERROR:
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callback.error(R.string.openpgp_error, contact);
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return;
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}
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}
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});
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}
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public PendingIntent getIntentForKey(Contact contact) {
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Intent params = new Intent();
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params.setAction(OpenPgpApi.ACTION_GET_KEY);
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params.putExtra(OpenPgpApi.EXTRA_KEY_ID, contact.getPgpKeyId());
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params.putExtra(OpenPgpApi.EXTRA_ACCOUNT_NAME, contact.getAccount()
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.getJid());
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Intent result = api.executeApi(params, null, null);
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return (PendingIntent) result
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.getParcelableExtra(OpenPgpApi.RESULT_INTENT);
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}
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public PendingIntent getIntentForKey(Account account, long pgpKeyId) {
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Intent params = new Intent();
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params.setAction(OpenPgpApi.ACTION_GET_KEY);
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params.putExtra(OpenPgpApi.EXTRA_KEY_ID, pgpKeyId);
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params.putExtra(OpenPgpApi.EXTRA_ACCOUNT_NAME, account.getJid());
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Intent result = api.executeApi(params, null, null);
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return (PendingIntent) result
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.getParcelableExtra(OpenPgpApi.RESULT_INTENT);
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}
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}
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