package de.thedevstack.conversationsplus.crypto; import android.app.PendingIntent; import android.content.Intent; import org.openintents.openpgp.OpenPgpSignatureResult; import org.openintents.openpgp.util.OpenPgpApi; import org.openintents.openpgp.util.OpenPgpApi.IOpenPgpCallback; import java.io.ByteArrayInputStream; import java.io.ByteArrayOutputStream; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import de.thedevstack.conversationsplus.ConversationsPlusPreferences; import de.thedevstack.conversationsplus.services.filetransfer.FileTransferManager; import de.thedevstack.conversationsplus.utils.StreamUtil; import de.thedevstack.conversationsplus.R; import de.thedevstack.conversationsplus.entities.Account; import de.thedevstack.conversationsplus.entities.Contact; import de.thedevstack.conversationsplus.entities.Conversation; import de.thedevstack.conversationsplus.entities.DownloadableFile; import de.thedevstack.conversationsplus.entities.Message; import de.thedevstack.conversationsplus.persistance.FileBackend; import de.thedevstack.conversationsplus.services.XmppConnectionService; import de.thedevstack.conversationsplus.ui.UiCallback; public class PgpEngine { private OpenPgpApi api; private XmppConnectionService mXmppConnectionService; private static PgpEngine INSTANCE; public PgpEngine(OpenPgpApi api, XmppConnectionService service) { this.api = api; this.mXmppConnectionService = service; INSTANCE = this; } public static PgpEngine getInstance() { return INSTANCE; } public void decrypt(final Message message, final UiCallback callback) { Intent params = new Intent(); params.setAction(OpenPgpApi.ACTION_DECRYPT_VERIFY); final String uuid = message.getUuid(); if (message.getType() == Message.TYPE_TEXT) { InputStream is = new ByteArrayInputStream(message.getBody().getBytes()); final OutputStream os = new ByteArrayOutputStream(); api.executeApiAsync(params, is, os, new IOpenPgpCallback() { @Override public void onReturn(Intent result) { notifyPgpDecryptionService(message.getConversation().getAccount(), OpenPgpApi.ACTION_DECRYPT_VERIFY, result); switch (result.getIntExtra(OpenPgpApi.RESULT_CODE, OpenPgpApi.RESULT_CODE_ERROR)) { case OpenPgpApi.RESULT_CODE_SUCCESS: try { os.flush(); if (message.getEncryption() == Message.ENCRYPTION_PGP && message.getUuid().equals(uuid)) { message.setBody(os.toString()); message.setEncryption(Message.ENCRYPTION_DECRYPTED); if (message.trusted() && message.treatAsDownloadable() != Message.Decision.NEVER && (message.isHttpUploaded() || ConversationsPlusPreferences.autoDownloadFileLink()) && ConversationsPlusPreferences.autoAcceptFileSize() > 0) { FileTransferManager ftm = FileTransferManager.getInstance(); if (ftm.accept(message)) { ftm.transferFile(message); } } mXmppConnectionService.updateMessage(message); callback.success(message); } } catch (IOException e) { callback.error(R.string.openpgp_error, message); return; } return; case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED: callback.userInputRequried((PendingIntent) result .getParcelableExtra(OpenPgpApi.RESULT_INTENT), message); return; case OpenPgpApi.RESULT_CODE_ERROR: callback.error(R.string.openpgp_error, message); } } }); } else if (message.getType() == Message.TYPE_IMAGE || message.getType() == Message.TYPE_FILE) { try { final DownloadableFile inputFile = FileBackend.getFile(message, false); final DownloadableFile outputFile = FileBackend.getFile(message, true); outputFile.getParentFile().mkdirs(); outputFile.createNewFile(); InputStream is = new FileInputStream(inputFile); OutputStream os = new FileOutputStream(outputFile); api.executeApiAsync(params, is, os, new IOpenPgpCallback() { @Override public void onReturn(Intent result) { notifyPgpDecryptionService(message.getConversation().getAccount(), OpenPgpApi.ACTION_DECRYPT_VERIFY, result); switch (result.getIntExtra(OpenPgpApi.RESULT_CODE, OpenPgpApi.RESULT_CODE_ERROR)) { case OpenPgpApi.RESULT_CODE_SUCCESS: message.setEncryption(Message.ENCRYPTION_DECRYPTED); PgpEngine.this.mXmppConnectionService .updateMessage(message); inputFile.delete(); FileBackend.updateMediaScanner(outputFile, mXmppConnectionService); callback.success(message); return; case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED: callback.userInputRequried( (PendingIntent) result .getParcelableExtra(OpenPgpApi.RESULT_INTENT), message); return; case OpenPgpApi.RESULT_CODE_ERROR: callback.error(R.string.openpgp_error, message); } } }); } catch (final IOException e) { callback.error(R.string.error_decrypting_file, message); } } } public void encrypt(final Message message, final UiCallback callback) { Intent params = new Intent(); params.setAction(OpenPgpApi.ACTION_ENCRYPT); final Conversation conversation = message.getConversation(); if (conversation.getMode() == Conversation.MODE_SINGLE) { long[] keys = { conversation.getContact().getPgpKeyId(), conversation.getAccount().getPgpId() }; params.putExtra(OpenPgpApi.EXTRA_KEY_IDS, keys); } else { params.putExtra(OpenPgpApi.EXTRA_KEY_IDS, conversation.getMucOptions().getPgpKeyIds()); } if (!message.needsUploading()) { params.putExtra(OpenPgpApi.EXTRA_REQUEST_ASCII_ARMOR, true); String body = message.getBody(); InputStream is = new ByteArrayInputStream(body.getBytes()); final OutputStream os = new ByteArrayOutputStream(); api.executeApiAsync(params, is, os, new IOpenPgpCallback() { @Override public void onReturn(Intent result) { notifyPgpDecryptionService(message.getConversation().getAccount(), OpenPgpApi.ACTION_ENCRYPT, result); switch (result.getIntExtra(OpenPgpApi.RESULT_CODE, OpenPgpApi.RESULT_CODE_ERROR)) { case OpenPgpApi.RESULT_CODE_SUCCESS: try { os.flush(); StringBuilder encryptedMessageBody = new StringBuilder(); String[] lines = os.toString().split("\n"); for (int i = 2; i < lines.length - 1; ++i) { if (!lines[i].contains("Version")) { encryptedMessageBody.append(lines[i]); } } message.setEncryptedBody(encryptedMessageBody .toString()); callback.success(message); } catch (IOException e) { callback.error(R.string.openpgp_error, message); } break; case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED: callback.userInputRequried((PendingIntent) result .getParcelableExtra(OpenPgpApi.RESULT_INTENT), message); break; case OpenPgpApi.RESULT_CODE_ERROR: callback.error(R.string.openpgp_error, message); break; } } }); } else { try { DownloadableFile inputFile = FileBackend.getFile(message, true); DownloadableFile outputFile = FileBackend.getFile(message, false); outputFile.getParentFile().mkdirs(); outputFile.createNewFile(); final InputStream is = new FileInputStream(inputFile); final OutputStream os = new FileOutputStream(outputFile); api.executeApiAsync(params, is, os, new IOpenPgpCallback() { @Override public void onReturn(Intent result) { notifyPgpDecryptionService(message.getConversation().getAccount(), OpenPgpApi.ACTION_ENCRYPT, result); switch (result.getIntExtra(OpenPgpApi.RESULT_CODE, OpenPgpApi.RESULT_CODE_ERROR)) { case OpenPgpApi.RESULT_CODE_SUCCESS: try { os.flush(); } catch (IOException ignored) { //ignored } StreamUtil.close(os); callback.success(message); break; case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED: callback.userInputRequried( (PendingIntent) result .getParcelableExtra(OpenPgpApi.RESULT_INTENT), message); break; case OpenPgpApi.RESULT_CODE_ERROR: callback.error(R.string.openpgp_error, message); break; } } }); } catch (final IOException e) { callback.error(R.string.openpgp_error, message); } } } public long fetchKeyId(Account account, String status, String signature) { if ((signature == null) || (api == null)) { return 0; } if (status == null) { status = ""; } final StringBuilder pgpSig = new StringBuilder(); pgpSig.append("-----BEGIN PGP SIGNED MESSAGE-----"); pgpSig.append('\n'); pgpSig.append('\n'); pgpSig.append(status); pgpSig.append('\n'); pgpSig.append("-----BEGIN PGP SIGNATURE-----"); pgpSig.append('\n'); pgpSig.append('\n'); pgpSig.append(signature.replace("\n", "")); pgpSig.append('\n'); pgpSig.append("-----END PGP SIGNATURE-----"); Intent params = new Intent(); params.setAction(OpenPgpApi.ACTION_DECRYPT_VERIFY); params.putExtra(OpenPgpApi.EXTRA_REQUEST_ASCII_ARMOR, true); InputStream is = new ByteArrayInputStream(pgpSig.toString().getBytes()); ByteArrayOutputStream os = new ByteArrayOutputStream(); Intent result = api.executeApi(params, is, os); notifyPgpDecryptionService(account, OpenPgpApi.ACTION_DECRYPT_VERIFY, result); switch (result.getIntExtra(OpenPgpApi.RESULT_CODE, OpenPgpApi.RESULT_CODE_ERROR)) { case OpenPgpApi.RESULT_CODE_SUCCESS: OpenPgpSignatureResult sigResult = result .getParcelableExtra(OpenPgpApi.RESULT_SIGNATURE); if (sigResult != null) { return sigResult.getKeyId(); } else { return 0; } case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED: return 0; case OpenPgpApi.RESULT_CODE_ERROR: return 0; } return 0; } public void chooseKey(final Account account, final UiCallback callback) { Intent p = new Intent(); p.setAction(OpenPgpApi.ACTION_GET_SIGN_KEY_ID); api.executeApiAsync(p, null, null, new IOpenPgpCallback() { @Override public void onReturn(Intent result) { switch (result.getIntExtra(OpenPgpApi.RESULT_CODE, 0)) { case OpenPgpApi.RESULT_CODE_SUCCESS: callback.success(account); return; case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED: callback.userInputRequried((PendingIntent) result .getParcelableExtra(OpenPgpApi.RESULT_INTENT), account); return; case OpenPgpApi.RESULT_CODE_ERROR: callback.error(R.string.openpgp_error, account); } } }); } public void generateSignature(final Account account, String status, final UiCallback callback) { if (account.getPgpId() == -1) { return; } Intent params = new Intent(); params.setAction(OpenPgpApi.ACTION_CLEARTEXT_SIGN); params.putExtra(OpenPgpApi.EXTRA_REQUEST_ASCII_ARMOR, true); params.putExtra(OpenPgpApi.EXTRA_SIGN_KEY_ID, account.getPgpId()); InputStream is = new ByteArrayInputStream(status.getBytes()); final OutputStream os = new ByteArrayOutputStream(); api.executeApiAsync(params, is, os, new IOpenPgpCallback() { @Override public void onReturn(Intent result) { notifyPgpDecryptionService(account, OpenPgpApi.ACTION_SIGN, result); switch (result.getIntExtra(OpenPgpApi.RESULT_CODE, 0)) { case OpenPgpApi.RESULT_CODE_SUCCESS: StringBuilder signatureBuilder = new StringBuilder(); try { os.flush(); String[] lines = os.toString().split("\n"); boolean sig = false; for (String line : lines) { if (sig) { if (line.contains("END PGP SIGNATURE")) { sig = false; } else { if (!line.contains("Version")) { signatureBuilder.append(line); } } } if (line.contains("BEGIN PGP SIGNATURE")) { sig = true; } } } catch (IOException e) { callback.error(R.string.openpgp_error, account); return; } account.setPgpSignature(signatureBuilder.toString()); callback.success(account); return; case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED: callback.userInputRequried((PendingIntent) result .getParcelableExtra(OpenPgpApi.RESULT_INTENT), account); return; case OpenPgpApi.RESULT_CODE_ERROR: callback.error(R.string.openpgp_error, account); } } }); } public void hasKey(final Contact contact, final UiCallback callback) { Intent params = new Intent(); params.setAction(OpenPgpApi.ACTION_GET_KEY); params.putExtra(OpenPgpApi.EXTRA_KEY_ID, contact.getPgpKeyId()); api.executeApiAsync(params, null, null, new IOpenPgpCallback() { @Override public void onReturn(Intent result) { switch (result.getIntExtra(OpenPgpApi.RESULT_CODE, 0)) { case OpenPgpApi.RESULT_CODE_SUCCESS: callback.success(contact); return; case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED: callback.userInputRequried((PendingIntent) result .getParcelableExtra(OpenPgpApi.RESULT_INTENT), contact); return; case OpenPgpApi.RESULT_CODE_ERROR: callback.error(R.string.openpgp_error, contact); } } }); } public PendingIntent getIntentForKey(Contact contact) { Intent params = new Intent(); params.setAction(OpenPgpApi.ACTION_GET_KEY); params.putExtra(OpenPgpApi.EXTRA_KEY_ID, contact.getPgpKeyId()); Intent result = api.executeApi(params, null, null); return (PendingIntent) result .getParcelableExtra(OpenPgpApi.RESULT_INTENT); } public PendingIntent getIntentForKey(Account account, long pgpKeyId) { Intent params = new Intent(); params.setAction(OpenPgpApi.ACTION_GET_KEY); params.putExtra(OpenPgpApi.EXTRA_KEY_ID, pgpKeyId); Intent result = api.executeApi(params, null, null); return (PendingIntent) result .getParcelableExtra(OpenPgpApi.RESULT_INTENT); } private void notifyPgpDecryptionService(Account account, String action, final Intent result) { switch (result.getIntExtra(OpenPgpApi.RESULT_CODE, 0)) { case OpenPgpApi.RESULT_CODE_SUCCESS: if (OpenPgpApi.ACTION_SIGN.equals(action)) { account.getPgpDecryptionService().onKeychainUnlocked(); } break; case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED: account.getPgpDecryptionService().onKeychainLocked(); break; } } }