Tuesday, September 16, 2014

Open SSL Commands

Utility commands to be used in Open SSL :

Steps to install Open SSL :

  • You need "Microsoft visual C++ 2008 Redistributable"
  • Open SSL setup for the server

Usage of Open SSL :

To generate a private key of length 2048 bits:
openssl genrsa -out private.pem 2048

To get it into the required (PKCS#8, DER) format:
openssl pkcs8 -topk8 -in private.pem -outform DER -out private.der -nocrypt

To generate a public key from the private key:
openssl rsa -in private.pem -pubout -outform DER -out public.der

An example of how to use the code:

FileEncryption secure = new FileEncryption();
//FileEncryption is a class defined which you can check in the link provided below

// to encrypt a file
secure.saveKey(encryptedKeyFile, publicKeyFile);
secure.encrypt(fileToEncrypt, encryptedFile);

// to decrypt it again
secure.loadKey(encryptedKeyFile, privateKeyFile);
secure.decrypt(encryptedFile, unencryptedFile);

Source : http://www.macs.hw.ac.uk/~ml355/lore/pkencryption.htm

Detect the browser through javascript

In Cordys we do have a simple "system" variable which tells which browser we are using like below



But here the dependency would be system variable would be defined in a javascript in "application.js" which is a cordys platform javascript file.

To remove this dependency the following can be done

navigator.sayswho= (function(){
    var ua= navigator.userAgent, tem, 
    M= ua.match(/(opera|chrome|safari|firefox|msie|trident(?=\/))\/?\s*(\d+)/i) || [];
        tem=  /\brv[ :]+(\d+)/g.exec(ua) || [];
        return 'IE '+(tem[1] || '');
    if(M[1]=== 'Chrome'){
        tem= ua.match(/\bOPR\/(\d+)/)
        if(tem!= null) return 'Opera '+tem[1];
    M= M[2]? [M[1], M[2]]: [navigator.appName, navigator.appVersion, '-?'];
    if((tem= ua.match(/version\/(\d+)/i))!= null) M.splice(1, 1, tem[1]);
    return M.join(' ');

And you can use this piece of code like below

if(!navigator.sayswho.toLowerCase().indexOf("ie "))
 charCode = (event.which) ? event.which : event.keyCode;
 windowEventCode = event;
 }else if (window.event)
  charCode = window.event.keyCode;
  windowEventCode = window.event;