AES, ruby vs java

aes.java

import java.security.*;
import javax.crypto.*;
import javax.crypto.spec.*;
import java.io.*;

class aes{
    static byte[] ptext;
    static SecretKeySpec key;

    public static void main(String[] args) throws Exception {
        ptext = read("ptext");
        key = new SecretKeySpec(read("key"), "AES");

        long t = System.currentTimeMillis();
        doCiphers();
        System.out.println("finished in " + (System.currentTimeMillis() - t) + " ms");
    }

    // wrap the loop inside a method to enable JIT
    static void doCiphers() throws Exception {
        for (int i=0; i<1000; i++) {
            Cipher c = Cipher.getInstance("AES");
            c.init(Cipher.ENCRYPT_MODE, key);
            c.doFinal(ptext);
        }
    }

    static byte[] read(String fileName) throws Exception {
        RandomAccessFile f = new RandomAccessFile(fileName, "r");
        byte[] b = new byte[(int)f.length()];
        f.read(b);
        f.close();
        return b;
    }
}

aes.rb

require "openssl"

$str = File.read(__FILE__) * 1000
$key = 'm23a0sdf' * 4

# store them for java testing
File.open 'ptext', 'w' do |f|
  f << $str
end
File.open 'key', 'w' do |f|
  f << $key
end

def crypt
  1000.times do
    c = OpenSSL::Cipher.new 'aes-256-cbc'
    c.encrypt
    c.key = $key
    c.update $str
    c.final
  end
end

t = Time.now.to_f
crypt
diff = (Time.now.to_f - t) * 1000
puts "finished in #{diff} ms"

result.sh

$ ruby -v
ruby 2.1.0dev (2013-04-17) [x86_64-darwin12.3.0]
$ ruby aes.rb
finished in 1003.9401054382324 ms

$ java -version
java version "1.6.0_45"
Java(TM) SE Runtime Environment (build 1.6.0_45-b06-451-11M4406)
Java HotSpot(TM) 64-Bit Server VM (build 20.45-b01-451, mixed mode)
$ javac aes.java
$ java -d64 -server aes
finished in 4720 ms