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