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package com.zeapo.pwdstore.git;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.preference.PreferenceManager;
import android.text.InputType;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.LinearLayout;
import androidx.annotation.Nullable;
import androidx.appcompat.app.AlertDialog;
import com.jcraft.jsch.JSch;
import com.jcraft.jsch.JSchException;
import com.jcraft.jsch.KeyPair;
import com.zeapo.pwdstore.R;
import com.zeapo.pwdstore.UserPreference;
import com.zeapo.pwdstore.git.config.GitConfigSessionFactory;
import com.zeapo.pwdstore.git.config.SshConfigSessionFactory;
import com.zeapo.pwdstore.utils.PasswordRepository;
import org.eclipse.jgit.api.GitCommand;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.transport.JschConfigSessionFactory;
import org.eclipse.jgit.transport.SshSessionFactory;
import org.eclipse.jgit.transport.UsernamePasswordCredentialsProvider;
import java.io.File;
public abstract class GitOperation {
public static final int GET_SSH_KEY_FROM_CLONE = 201;
protected final Repository repository;
final Activity callingActivity;
UsernamePasswordCredentialsProvider provider;
GitCommand command;
/**
* Creates a new git operation
*
* @param fileDir the git working tree directory
* @param callingActivity the calling activity
*/
public GitOperation(File fileDir, Activity callingActivity) {
this.repository = PasswordRepository.getRepository(fileDir);
this.callingActivity = callingActivity;
}
/**
* Sets the authentication using user/pwd scheme
*
* @param username the username
* @param password the password
* @return the current object
*/
GitOperation setAuthentication(String username, String password) {
SshSessionFactory.setInstance(new GitConfigSessionFactory());
this.provider = new UsernamePasswordCredentialsProvider(username, password);
return this;
}
/**
* Sets the authentication using ssh-key scheme
*
* @param sshKey the ssh-key file
* @param username the username
* @param passphrase the passphrase
* @return the current object
*/
GitOperation setAuthentication(File sshKey, String username, String passphrase) {
JschConfigSessionFactory sessionFactory = new SshConfigSessionFactory(sshKey.getAbsolutePath(), username, passphrase);
SshSessionFactory.setInstance(sessionFactory);
this.provider = null;
return this;
}
/**
* Executes the GitCommand in an async task
*/
public abstract void execute();
/**
* Executes the GitCommand in an async task after creating the authentication
*
* @param connectionMode the server-connection mode
* @param username the username
* @param sshKey the ssh-key file
*/
public void executeAfterAuthentication(final String connectionMode, final String username, @Nullable final File sshKey) {
executeAfterAuthentication(connectionMode, username, sshKey, false);
}
/**
* Executes the GitCommand in an async task after creating the authentication
*
* @param connectionMode the server-connection mode
* @param username the username
* @param sshKey the ssh-key file
* @param showError show the passphrase edit text in red
*/
private void executeAfterAuthentication(final String connectionMode, final String username, @Nullable final File sshKey, final boolean showError) {
if (connectionMode.equalsIgnoreCase("ssh-key")) {
if (sshKey == null || !sshKey.exists()) {
new AlertDialog.Builder(callingActivity)
.setMessage(callingActivity.getResources().getString(R.string.ssh_preferences_dialog_text))
.setTitle(callingActivity.getResources().getString(R.string.ssh_preferences_dialog_title))
.setPositiveButton(callingActivity.getResources().getString(R.string.ssh_preferences_dialog_import), (dialog, id) -> {
try {
// Ask the UserPreference to provide us with the ssh-key
// onResult has to be handled by the callingActivity
Intent intent = new Intent(callingActivity.getApplicationContext(), UserPreference.class);
intent.putExtra("operation", "get_ssh_key");
callingActivity.startActivityForResult(intent, GET_SSH_KEY_FROM_CLONE);
} catch (Exception e) {
System.out.println("Exception caught :(");
e.printStackTrace();
}
})
.setNegativeButton(callingActivity.getResources().getString(R.string.ssh_preferences_dialog_generate), (dialog, which) -> {
try {
// Duplicated code
Intent intent = new Intent(callingActivity.getApplicationContext(), UserPreference.class);
intent.putExtra("operation", "make_ssh_key");
callingActivity.startActivityForResult(intent, GET_SSH_KEY_FROM_CLONE);
} catch (Exception e) {
System.out.println("Exception caught :(");
e.printStackTrace();
}
})
.setNeutralButton(callingActivity.getResources().getString(R.string.dialog_cancel), (dialog, id) -> {
// Finish the blank GitActivity so user doesn't have to press back
callingActivity.finish();
}).show();
} else {
LayoutInflater layoutInflater = LayoutInflater.from(callingActivity.getApplicationContext());
@SuppressLint("InflateParams") final View dialogView = layoutInflater.inflate(R.layout.git_passphrase_layout, null);
final EditText passphrase = dialogView.findViewById(R.id.sshkey_passphrase);
final SharedPreferences settings = PreferenceManager.getDefaultSharedPreferences(callingActivity.getApplicationContext());
final String sshKeyPassphrase = settings.getString("ssh_key_passphrase", null);
if (showError) {
passphrase.setError("Wrong passphrase");
}
JSch jsch = new JSch();
try {
final KeyPair keyPair = KeyPair.load(jsch, callingActivity.getFilesDir() + "/.ssh_key");
if (keyPair.isEncrypted()) {
if (sshKeyPassphrase != null && !sshKeyPassphrase.isEmpty()) {
if (keyPair.decrypt(sshKeyPassphrase)) {
// Authenticate using the ssh-key and then execute the command
setAuthentication(sshKey, username, sshKeyPassphrase).execute();
} else {
// call back the method
executeAfterAuthentication(connectionMode, username, sshKey, true);
}
} else {
new AlertDialog.Builder(callingActivity)
.setTitle(callingActivity.getResources().getString(R.string.passphrase_dialog_title))
.setMessage(callingActivity.getResources().getString(R.string.passphrase_dialog_text))
.setView(dialogView)
.setPositiveButton(callingActivity.getResources().getString(R.string.dialog_ok), (dialog, whichButton) -> {
if (keyPair.decrypt(passphrase.getText().toString())) {
boolean rememberPassphrase = ((CheckBox) dialogView.findViewById(R.id.sshkey_remember_passphrase)).isChecked();
if (rememberPassphrase) {
settings.edit().putString("ssh_key_passphrase", passphrase.getText().toString()).apply();
}
// Authenticate using the ssh-key and then execute the command
setAuthentication(sshKey, username, passphrase.getText().toString()).execute();
} else {
settings.edit().putString("ssh_key_passphrase", null).apply();
// call back the method
executeAfterAuthentication(connectionMode, username, sshKey, true);
}
}).setNegativeButton(callingActivity.getResources().getString(R.string.dialog_cancel), (dialog, whichButton) -> {
// Do nothing.
}).show();
}
} else {
setAuthentication(sshKey, username, "").execute();
}
} catch (JSchException e) {
new AlertDialog.Builder(callingActivity)
.setTitle("Unable to open the ssh-key")
.setMessage("Please check that it was imported.")
.setPositiveButton("Ok", (dialogInterface, i) -> {
}).show();
}
}
} else {
final EditText password = new EditText(callingActivity);
password.setHint("Password");
password.setWidth(LinearLayout.LayoutParams.MATCH_PARENT);
password.setInputType(InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_PASSWORD);
new AlertDialog.Builder(callingActivity)
.setTitle(callingActivity.getResources().getString(R.string.passphrase_dialog_title))
.setMessage(callingActivity.getResources().getString(R.string.password_dialog_text))
.setView(password)
.setPositiveButton(callingActivity.getResources().getString(R.string.dialog_ok), (dialog, whichButton) -> {
// authenticate using the user/pwd and then execute the command
setAuthentication(username, password.getText().toString()).execute();
}).setNegativeButton(callingActivity.getResources().getString(R.string.dialog_cancel), (dialog, whichButton) -> {
// Do nothing.
}).show();
}
}
/**
* Action to execute on error
*/
public void onError(String errorMessage) {
new AlertDialog.Builder(callingActivity).
setTitle(callingActivity.getResources().getString(R.string.jgit_error_dialog_title)).
setMessage(callingActivity.getResources().getString(R.string.jgit_error_dialog_text) + errorMessage).
setPositiveButton(callingActivity.getResources().getString(R.string.dialog_ok), (dialogInterface, i) -> {
callingActivity.setResult(Activity.RESULT_CANCELED);
callingActivity.finish();
}).show();
}
/**
* Action to execute on success
*/
public void onSuccess() {
}
}
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