316 lines
11 KiB
Java
316 lines
11 KiB
Java
package eu.siacs.conversations.crypto;
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import android.app.PendingIntent;
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import android.content.Intent;
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import android.util.Log;
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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 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.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 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.persistance.FileBackend;
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import eu.siacs.conversations.services.XmppConnectionService;
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import eu.siacs.conversations.ui.UiCallback;
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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 encrypt(final Message message, 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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final Conversation conversation = message.getConversation();
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if (conversation.getMode() == Conversation.MODE_SINGLE) {
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long[] keys = {
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conversation.getContact().getPgpKeyId(),
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conversation.getAccount().getPgpId()
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};
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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, conversation.getMucOptions().getPgpKeyIds());
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}
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if (!message.needsUploading()) {
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params.putExtra(OpenPgpApi.EXTRA_REQUEST_ASCII_ARMOR, true);
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String body;
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if (message.hasFileOnRemoteHost()) {
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body = message.getFileParams().url.toString();
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} else {
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body = message.getBody();
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}
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InputStream is = new ByteArrayInputStream(body.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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logError(conversation.getAccount(), (OpenPgpError) result.getParcelableExtra(OpenPgpApi.RESULT_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 {
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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.getParentFile().mkdirs();
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outputFile.createNewFile();
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final InputStream is = new FileInputStream(inputFile);
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final 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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try {
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os.flush();
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} catch (IOException ignored) {
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//ignored
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}
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FileBackend.close(os);
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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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logError(conversation.getAccount(), (OpenPgpError) result.getParcelableExtra(OpenPgpApi.RESULT_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 (final IOException e) {
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callback.error(R.string.openpgp_error, message);
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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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final 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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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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logError(account, (OpenPgpError) result.getParcelableExtra(OpenPgpApi.RESULT_ERROR));
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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 chooseKey(final Account account, final UiCallback<Account> callback) {
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Intent p = new Intent();
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p.setAction(OpenPgpApi.ACTION_GET_SIGN_KEY_ID);
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api.executeApiAsync(p, 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(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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logError(account, (OpenPgpError) result.getParcelableExtra(OpenPgpApi.RESULT_ERROR));
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callback.error(R.string.openpgp_error, account);
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}
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}
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});
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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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if (account.getPgpId() == 0) {
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return;
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}
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Intent params = new Intent();
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params.setAction(OpenPgpApi.ACTION_CLEARTEXT_SIGN);
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params.putExtra(OpenPgpApi.EXTRA_REQUEST_ASCII_ARMOR, true);
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params.putExtra(OpenPgpApi.EXTRA_SIGN_KEY_ID, account.getPgpId());
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InputStream is = new ByteArrayInputStream(status.getBytes());
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final OutputStream os = new ByteArrayOutputStream();
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Log.d(Config.LOGTAG,account.getJid().toBareJid()+": signing status message \""+status+"\"");
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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.setPgpSignature(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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OpenPgpError error = result.getParcelableExtra(OpenPgpApi.RESULT_ERROR);
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if (error != null && "signing subkey not found!".equals(error.getMessage())) {
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callback.error(0,account);
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} else {
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logError(account, error);
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callback.error(R.string.unable_to_connect_to_keychain, null);
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}
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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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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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logError(contact.getAccount(), (OpenPgpError) result.getParcelableExtra(OpenPgpApi.RESULT_ERROR));
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callback.error(R.string.openpgp_error, contact);
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}
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}
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});
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}
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private static void logError(Account account, OpenPgpError error) {
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if (error != null) {
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Log.d(Config.LOGTAG,account.getJid().toBareJid().toString()+": OpenKeychain error '"+error.getMessage()+"' code="+error.getErrorId());
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} else {
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Log.d(Config.LOGTAG,account.getJid().toBareJid().toString()+": OpenKeychain error with no message");
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}
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}
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public PendingIntent getIntentForKey(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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Intent result = api.executeApi(params, null, null);
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return (PendingIntent) result.getParcelableExtra(OpenPgpApi.RESULT_INTENT);
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}
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}
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