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Make AsyncTask for ssh key generation and show a progress dialog. Show the exception if it fails

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This commit is contained in:
Matthew Wong 2015-07-15 02:50:45 -04:00
parent e0954cd400
commit d03ab8ee3c
1 changed files with 73 additions and 33 deletions
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106
app/src/main/java/com/zeapo/pwdstore/SshKeyGen.java
View file

@ -1,9 +1,13 @@
package com.zeapo.pwdstore;
import android.app.AlertDialog;
import android.app.Fragment;
import android.app.ProgressDialog;
import android.content.ClipData;
import android.content.ClipboardManager;
import android.content.Context;
import android.content.DialogInterface;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.LayoutInflater;
@ -37,7 +41,7 @@ public class SshKeyGen extends AppCompatActivity {
Spinner spinner = (Spinner) v.findViewById(R.id.length);
Integer[] lengths = new Integer[]{2048, 4096};
ArrayAdapter<Integer> adapter = new ArrayAdapter<Integer>(getActivity(),
ArrayAdapter<Integer> adapter = new ArrayAdapter<>(getActivity(),
android.R.layout.simple_spinner_dropdown_item, lengths);
spinner.setAdapter(adapter);
@ -59,7 +63,6 @@ public class SshKeyGen extends AppCompatActivity {
File file = new File(getActivity().getFilesDir() + "/.ssh_key.pub");
try {
textView.setText(FileUtils.readFileToString(file));
Toast.makeText(getActivity(), "SSH-key generated", Toast.LENGTH_LONG).show();
} catch (Exception e) {
System.out.println("Exception caught :(");
e.printStackTrace();
@ -81,7 +84,8 @@ public class SshKeyGen extends AppCompatActivity {
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
if (getSupportActionBar() != null)
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
setTitle("Generate SSH Key");
@ -93,40 +97,76 @@ public class SshKeyGen extends AppCompatActivity {
}
}
private class generateTask extends AsyncTask<View, Void, Exception> {
private ProgressDialog pd;
protected Exception doInBackground(View... views) {
InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
imm.hideSoftInputFromWindow(views[0].getWindowToken(), 0);
Spinner spinner = (Spinner) findViewById(R.id.length);
int length = (Integer) spinner.getSelectedItem();
TextView textView = (TextView) findViewById(R.id.passphrase);
String passphrase = textView.getText().toString();
textView = (TextView) findViewById(R.id.comment);
String comment = textView.getText().toString();
JSch jsch = new JSch();
try {
KeyPair kp = KeyPair.genKeyPair(jsch, KeyPair.RSA, length);
File file = new File(getFilesDir() + "/.ssh_key");
FileOutputStream out = new FileOutputStream(file, false);
kp.writePrivateKey(out, passphrase.getBytes());
file = new File(getFilesDir() + "/.ssh_key.pub");
out = new FileOutputStream(file, false);
kp.writePublicKey(out, comment);
return null;
} catch (Exception e) {
System.out.println("Exception caught :(");
e.printStackTrace();
return e;
}
}
@Override
protected void onPreExecute() {
super.onPreExecute();
pd = ProgressDialog.show(SshKeyGen.this, "", "Generating keys");
}
@Override
protected void onPostExecute(Exception e) {
super.onPostExecute(e);
pd.dismiss();
if (e == null) {
Toast.makeText(SshKeyGen.this, "SSH-key generated", Toast.LENGTH_LONG).show();
getFragmentManager().beginTransaction()
.replace(android.R.id.content, new ShowSshKeyFragment()).commit();
} else {
new AlertDialog.Builder(SshKeyGen.this)
.setTitle("Error while trying to generate the ssh-key")
.setMessage(getResources().getString(R.string.ssh_key_error_dialog_text) + e.getMessage())
.setPositiveButton(getResources().getString(R.string.dialog_ok), new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
// pass
}
}).show();
}
}
}
// Invoked when 'Generate' button of SshKeyGenFragment clicked. Generates a
// private and public key, then replaces the SshKeyGenFragment with a
// ShowSshKeyFragment which displays the public key.
public void generate(View view) {
InputMethodManager imm = (InputMethodManager) this.getSystemService(Context.INPUT_METHOD_SERVICE);
imm.hideSoftInputFromWindow(view.getWindowToken(), 0);
Spinner spinner = (Spinner) findViewById(R.id.length);
int length = (Integer) spinner.getSelectedItem();
TextView textView = (TextView) findViewById(R.id.passphrase);
String passphrase = textView.getText().toString();
textView = (TextView) findViewById(R.id.comment);
String comment = textView.getText().toString();
JSch jsch = new JSch();
try {
KeyPair kp = KeyPair.genKeyPair(jsch, KeyPair.RSA, length);
File file = new File(getFilesDir() + "/.ssh_key");
FileOutputStream out = new FileOutputStream(file, false);
kp.writePrivateKey(out, passphrase.getBytes());
file = new File(getFilesDir() + "/.ssh_key.pub");
out = new FileOutputStream(file, false);
kp.writePublicKey(out, comment);
} catch (Exception e) {
System.out.println("Exception caught :(");
e.printStackTrace();
return;
}
getFragmentManager().beginTransaction()
.replace(android.R.id.content, new ShowSshKeyFragment()).commit();
new generateTask().execute(view);
}
// Invoked when 'Copy' button of ShowSshKeyFragment clicked. Copies the