Fedora

A small HTTP debug server in Go

Posted on August 31, 2018

Lately, I found myself to work on an application that was communicating via SOAP with a server. My goal was to understand how this application worked with the SOAP server to emulate its behavior. Even if I had access to the source code of the application, I thought it would have been easier, faster and more fun to do the work without actually reading the code. It’s important to note that actually, the application is fairly small and self-contained.

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Why you should bundle the root CAs in your image

Posted on July 13, 2018

If you have ever used Docker or any other Linux OCI container system, you inevitably have incurred in the following error: x509: failed to load system roots and no roots provided This message is remembering you that you forgot to provide Root Certificate Authorities to your application. There are two different ways to solve this: mount the /etc/ssl/certs folder from the machine where the container is running bundling the root CAs in your image As you may imagine from the title, I believe that the second option is by far better than the first one.

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Why SMS should never be used as second factor

Posted on June 27, 2018

Lately, all website are urging their users to enable second-factors. The push for multi-factor logins is a good thing from my point of view, since the people are putting more and more details of their life online and is a good thing that companies start to understand the security implication of this and are trying to teach their users good security practices. The real problem is what is defined as second-factor.

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Why everything will end up in a container

Posted on May 9, 2018

A couple of months ago, I wrote a blog post about why containerization is not always the answer and I’ve received quite a few comments about it. This article has the goal to analyze an aspect in favor of containerization which I believe to be true but was not mentioned in the previous post: the time aspect of the phenomenon. In the ICT sector, we are used to new technologies, or at least we should be.

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An HTTP server to serve GCS files

Posted on April 12, 2018

As many other clouds, Google Cloud Platform provides an Object Storage service, Google Cloud Storage. As many other Object Storage service, Google Cloud Storage provides an HTTP server to deliver your files quickly. When I started to use Google Cloud Storage and its HTTP server I have not been entirely pleased by how it works and therefore I wanted to re-implement the HTTP server so that I can manage it completely.

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Why containerization is not always the answer

Posted on March 27, 2018

UPDATE: I’ve then written another post to clarify better my point of view on the future of containers. When I hear people (and usually those people are salespeople) saying that as soon as you put a Container Platform in your company, all your problems go away, I feel bad for the company they are trying to sell it to. I’ve seen far too many container platforms (as well as many other technologies) fail at customers because they have been sold as this magical problem that makes all your problems go away.

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FOSDEM 2018

Posted on February 4, 2018 - Bruxelles, BE

This year, as it has happened for the last few years, I’ve been at FOSDEM. As always I’ve enjoyed it a lot, and that’s why I continue to go there, and every time I have to suggest other people which events to attend in Europe, I always mention FOSDEM as the principal event. This year, differently from previous editions, I tried to stick to a single room during Saturday (the Go one).

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Why DevOps is just a buzzword

Posted on January 5, 2018

I found myself multiple times in situations where people were trying to explain to me how much they are (or would like to be) DevOps and how awesome DevOps is and how productive their teams had become since when they merged the Dev team and the Ops team, and they don’t have any team which is not DevOps and application-centric. I usually stare at them thinking that they have no idea what they are talking about, or they have just outsourced all the non-application-centric side of their IT and have not realized it.

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Walkthrough a PEM file in Go

Posted on December 21, 2017

A few months ago, I posted how to create a PKI in Go. Today I’d like to add share a useful function (at least from my point of view) that I found myself to write. The problem arose when I had a function that required as input a *pem.Block of the public key, but all I had was the PEM file containing, as you can imagine: the Private Key the Public Key the CA Public Key I think this is a typical situation, and for this, I’d like to share a function I wrote to extract it.

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SSH with Yubikey

Posted on November 3, 2017

Authentication factors One of the common way to create more secure authentication in systems is adding more “factors”, creating in this way a Multi-Factor Authentication (MFA). The idea behind MFA is that there are many different ways to authenticate a user, and those can be split in different “categories” based on the kind of challenge we require. Generally speaking, it’s common to divide the authentication methods in mainly three categories:

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