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  OpenLDAP Proxy -- Installation and configuration

After understanding what the configuration would be for an OpenLDAP proxy, it's time to explain the installation of OpenLDAP proxy and how to make it run. In this post, we will cover how to install OpenLDAP proxy both locally and using docker. Local installation The installation is quite easy, there are a few packages to be installed including the ldap server, ldap client and some utilities. Below steps are for CentOS, the instructions for other platforms should be similar with minor differ...

   INSTALLATION,CENTOS,DOCKER,OPENLDAP,OPENLDAP PROXY     2017-11-03 20:26:41

  Supercolliding a PHP array

Did you know that inserting 2^16 = 65536 specially crafted values into a normal PHP array can take 30 seconds? Normally this would take only 0.01 seconds. This is the code to reproduce it: <?php echo '<pre>'; $size = pow(2, 16); // 16 is just an example, could also be 15 or 17 $startTime = microtime(true); $array = array(); for ($key = 0, $maxKey = ($size - 1) * $size; $key <= $maxKey; $key += $size) { $array[$key] = 0; } $endTime = microtime(true); echo 'Inserting...

   PHP,Array,hashtable,Slow,Colliding     2011-12-29 09:02:01

  4 ways to obtain access token in OAuth 2.0

OAuth 2.0 is an authorization mechanism, it's ,mainly used for issuing access token. There are 4 ways to obtain access token as per RFC 6749. Authorization code Implicit Password Client credentials The third party application must obtain a client id and client secret from the target service before obtaining access token no matter which method to use. This is to prevent token to be used maliciously. Authorization code With this method, the third party application must first get an authorization...

   OAUTH2,ACCESS TOKEN,REFRESH TOKEN     2019-06-29 07:12:03

  Create namespace in JavaScript

A namespace (sometimes also called a name scope) is an abstract container or environment created to hold a logical grouping of unique identifiers or symbols (i.e., names). An identifier defined in a namespace is associated only with that namespace. The same identifier can be independently defined in multiple namespaces. That is, the meaning associated with an identifier defined in one namespace may or may not have the same meaning as the same identifier defined in another namespace. Languag...

   JavaScript,namespace,example     2012-05-10 04:57:17

  OpenLDAP Proxy -- slapd.conf

In the introductory post of OpenLDAP proxy, we mentioned that slapd.conf is the configuration file which tells the slapd service what to do.  Apart from this, there is a dynamic way of configuring slapd where the configurations are stored in LDIF database. In the future, LDIF database will be the one for configuring slapd, the old style of slapd.conf is deprecated. The slapd.conf can be converted to LDIF style using the slapdtest command. slapdtest -f /etc/ldap/slapd.conf -F /etc...

   OPENLDAP,OPENLDAP PROXY,SLAPD,SLAPD.CONF     2017-10-29 04:01:39

  Lossless and Transparency Encoding in WebP

In September 2010 we announced the WebP image format with lossy compression. WebP was proposed as an alternative to JPEG, with 25–34% better compression compared to JPEG images at equivalent SSIM index. We received lots of feedback, and have been busy improving the format.Last month we announced WebP support for animation, ICC profile, XMP metadata and tiling. Today, we introduce a new mode in WebP to compress images losslessly, and support for transparency â€â...

   Google,WebP,Image,Compress, Lossless compression,Transparency     2011-11-18 08:48:33

  Spring – Web sockets in Java Development

Experts of java development team are sharing this article with entire java development community. The purpose behind intending this post is to explain spring – Web sockets as a concept to rest of the world. Technology: Web socket is the one of the protocol supported by web-browsers and web-servers. It provides the two-way communication between client and server. It is used in any Java application for providing the two way communication between client and server. It opens a connection betw...

   JAVA DEVELOPMENT,SPRING,JAVA TECHNOLOGY     2016-09-13 03:56:54

  Making Your Tech Conference Presentation, and Experience, Not Suck

Tech conferences are incredibly expensive, and not just in dollars. Even free conferences like BarCamps incur the expense of the attendee’s time. Taking time off from work or family is a hassle at the very least, and it’s time that isn’t billable. The draw of the conference boils down to those 45 minute sessions, and speaker and attendee alike should make the most of it. Speakers often start off by wasting time. They front-load the presentation with worthless informatio...

   Soft skill,Tech presentation,Advice,Highlight     2011-12-20 08:50:00

  How does JGSS read Windows native TGT credential?

MS LSA is a protected subsystem that authenticates and logs users onto the local system. The user credential is stored at the native credential cache of LSA on Windows. This kind of credential is often used to authenticate the user to the server, one of the authentication methods is Kerberos. JGSS has provided a native interface which can read the native TGT credential and use it to get the TGS of a service. But how does JGSS read the native TGT credential? Here is a sample code for reading nati...

   KERBEROS,JGSS,MS LSA,NATIVE CREDENTIAL,TGT,SESSION KEY TYPE     2015-03-25 03:42:32

  Readability in Programming Languages

I saw a side by side comparison of a bunch of scripting languages online recently. Scripting Languages: PHP, Perl, Python, Ruby My first, and second reaction was yuck! Now I have my biases – biases which may  not be shared by others of course. But I like readable code and for me anytime I see a special character (anything not an alphanumeric) it slows me down. This got me thinking about where we are going in design of programming languages? Are we moving forward (what ever ...

   Programming,Style,Coding style,Readabili     2011-09-22 09:20:03

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