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package eu.siacs.conversations.crypto;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
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.entities.Account;
import eu.siacs.conversations.entities.Contact;
import eu.siacs.conversations.entities.Message;
import android.app.PendingIntent;
import android.content.Intent;
import android.util.Log;
public class PgpEngine {
private OpenPgpApi api;
public PgpEngine(OpenPgpApi api) {
this.api = api;
}
public void decrypt(final Message message, final OnPgpEngineResult callback) {
Intent params = new Intent();
params.setAction(OpenPgpApi.ACTION_DECRYPT_VERIFY);
params.putExtra(OpenPgpApi.EXTRA_ACCOUNT_NAME, message
.getConversation().getAccount().getJid());
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:
message.setBody(os.toString());
message.setEncryption(Message.ENCRYPTION_DECRYPTED);
callback.success();
return;
case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED:
callback.userInputRequried((PendingIntent) result
.getParcelableExtra(OpenPgpApi.RESULT_INTENT));
return;
case OpenPgpApi.RESULT_CODE_ERROR:
callback.error((OpenPgpError) result
.getParcelableExtra(OpenPgpApi.RESULT_ERROR));
return;
default:
return;
}
}
});
}
public void encrypt(Account account, long keyId, Message message,
final OnPgpEngineResult callback) {
Log.d("xmppService", "called to pgpengine::encrypt");
long[] keys = { keyId };
Intent params = new Intent();
params.setAction(OpenPgpApi.ACTION_ENCRYPT);
params.putExtra(OpenPgpApi.EXTRA_KEY_IDS, keys);
params.putExtra(OpenPgpApi.EXTRA_REQUEST_ASCII_ARMOR, true);
params.putExtra(OpenPgpApi.EXTRA_ACCOUNT_NAME, account.getJid());
InputStream is = new ByteArrayInputStream(message.getBody().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:
StringBuilder encryptedMessageBody = new StringBuilder();
String[] lines = os.toString().split("\n");
for (int i = 3; i < lines.length - 1; ++i) {
encryptedMessageBody.append(lines[i].trim());
}
message.setEncryptedBody(encryptedMessageBody.toString());
callback.success();
return;
case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED:
callback.userInputRequried((PendingIntent) result
.getParcelableExtra(OpenPgpApi.RESULT_INTENT));
return;
case OpenPgpApi.RESULT_CODE_ERROR:
callback.error((OpenPgpError) result
.getParcelableExtra(OpenPgpApi.RESULT_ERROR));
return;
}
}
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:
Log.d("xmppService","user interaction required");
return 0;
case OpenPgpApi.RESULT_CODE_ERROR:
Log.d("xmppService","pgp error");
return 0;
}
return 0;
}
public void generateSignature(final Account account, String status,
final OnPgpEngineResult 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();
String[] lines = os.toString().split("\n");
for (int i = 7; i < lines.length - 1; ++i) {
signatureBuilder.append(lines[i].trim());
}
account.setKey("pgp_signature", signatureBuilder.toString());
callback.success();
return;
case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED:
callback.userInputRequried((PendingIntent) result
.getParcelableExtra(OpenPgpApi.RESULT_INTENT));
return;
case OpenPgpApi.RESULT_CODE_ERROR:
callback.error((OpenPgpError) result
.getParcelableExtra(OpenPgpApi.RESULT_ERROR));
return;
}
}
});
}
public void hasKey(Account account, long keyId, final OnPgpEngineResult callback) {
Intent params = new Intent();
params.setAction(OpenPgpApi.ACTION_GET_KEY);
params.putExtra(OpenPgpApi.EXTRA_KEY_ID, keyId);
params.putExtra(OpenPgpApi.EXTRA_ACCOUNT_NAME, account.getJid());
InputStream is = new ByteArrayInputStream(new byte[0]);
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:
callback.success();
return;
case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED:
callback.userInputRequried((PendingIntent) result
.getParcelableExtra(OpenPgpApi.RESULT_INTENT));
return;
case OpenPgpApi.RESULT_CODE_ERROR:
callback.error((OpenPgpError) result
.getParcelableExtra(OpenPgpApi.RESULT_ERROR));
return;
}
}
});
}
}
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