lry127

import javax.crypto.*;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.PBEKeySpec;
import javax.crypto.spec.SecretKeySpec;
import java.nio.charset.StandardCharsets;
import java.security.InvalidAlgorithmParameterException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import java.security.spec.InvalidKeySpecException;

berkedel

How to import x509.pem pk8 file into jks keystore

Prerequiste:

• OpenSSL and keytool installed and added to your PATH

Generate a file platform.priv.pem from you pk8 file.

openssl pkcs8 -in platform.pk8 -inform DER -outform PEM -out platform.priv.pem -nocrypt

nielsutrecht

import javax.crypto.Cipher;
import java.nio.charset.StandardCharsets;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.SecureRandom;
import java.security.Signature;

public class RsaExample {
    public static void main(String... argv) throws Exception {
        //First generate a public/private key pair

fntlnz

Create Root CA (Done once)

Last update: Nov 2025.

Create Root Key

Attention: this is the key used to sign the certificate requests, anyone holding this can sign certificates on your behalf. So keep it in a safe place!

openssl ecparam -genkey -name secp384r1 | openssl ec -aes256 -out rootCA.key

ndahlquist

//
// !!WARNING: Not recommended for production code!!
//
public class ClassLoaderActivity extends Activity
{
	public void onCreate(Bundle savedInstanceState)
	{
		// file.jar has a dex'd "classes.dex" entry that you can generate with "dx" from any number of JARs or class files
		ClassLoader dexLoader = new DexClassLoader("/path/to/file.jar", getCacheDir().getAbsolutePath(), null, getClassLoader());
		setAPKClassLoader(dexLoader);

nickcaballero

public class Dexter {
 
    private static String optimizedDirectory = "optimized";
    private static String workDirectory = "working";
 
    public static void loadFromAssets(Context context, String fileName) throws Exception {
 
        File optimized = new File(optimizedDirectory);
        optimized = context.getDir(optimized.toString(), Context.MODE_PRIVATE);
        optimized = new File(optimized, fileName);

sp3c73r2038

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import urllib
import urllib2

data = urllib2.urlencode({'foo': 'bar'})

r = urllib2.Request('https://www.google.com',        # url
                    data,                            # post data

marshall

//
// !!WARNING: Not recommended for production code!!
//
public class ClassLoaderActivity extends Activity
{
	public void onCreate(Bundle savedInstanceState)
	{
		// file.jar has a dex'd "classes.dex" entry that you can generate with "dx" from any number of JARs or class files
		ClassLoader dexLoader = new DexClassLoader("/path/to/file.jar", getCacheDir().getAbsolutePath(), null, getClassLoader());
		setAPKClassLoader(dexLoader);

schacon

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