Algum tempo atrás, o post “Assinatura Digital do ICPEdu em PDF no GNU Linux” mostrou como utilizar o sistema de certificado de assinatura digital ICP-Edu da Rede Nacional de Ensino e Pesquisa (RNP) no GNU Linux. Para entender melhor os objetivos do ICP-Edu e o procedimento básico de obtenção de…

Building a cross-platform application on C++ is quite challenging, specially when thirdparty package dependencies are involved. This article briefly discusses the issues faced when building the GNU MP BigNum Library on Windows, Linux and MacOS-OSX. To experiment with different build scenarios, a repo was created on github, called manydeps/manydeps-gmp. By…

Reference type is a complicated subject in C++, although necessary to program certain behaviors. A classic application is on assignment operators, where a reference to the type itself is returned. In many other scenarios, a reference T& can be replaced by a pointer T*, what brings other issues, due to…

It was around the end of 2017 when a chat with my brother Vitor Nazário about the risks on putting sensitive data centralized clouds made us follow a new direction: let’s host our own cloud. Before advancing in the text, some general warnings (from 5 years in the future): hosting…

Com a digitalização dos processos brasileiros, se torna cada vez mais útil (e às vezes necessário) a obtenção de um CPF digital, chamado de e-CPF. O e-CPF tem propriedades criptográficas, permitindo dentre outras coisas, efetuar assinaturas digitais. Devido ao não-repúdio, uma vez assinado um documento com o e-CPF, essa assinatura…

Assinaturas de documentos oficiais, em formato digital, tipicamente demandam algum tipo de tecnologia criptográfica que garanta a autenticidade e não repúdio do assinante. No Brasil, a Infraestutura de Chaves Públicas para Ensino e Pesquisa (ICPEdu) oferecida pela Rede Nacional de Ensino e Pesquisa (RNP) atualmente provê um serviço emissão de…

Checking math exercises can be easily done in a automated way, by using GitHub Classroom together with GNU Octave. We have recently discussed how to autograde C++ programming exercises, and now we extend this knowledge for math exercises. This tutorial is intended for college teachers/professors, and if you want to…

The Bazel Build system was originated from Google, being released afterward to the general public as open-source. It is important for languages such as C/C++ that depend on compile/linking phases, which often depend on other third-party projects/libraries. In this article, we demonstrate how to configure Bazel on Windows to compile…

Autograding tools are very important to improve feedback during programming exercises for students. Hopefully, we already have amazing (and free) tools/platforms to do that! Let’s take a look at Github Classroom for autograding C++ tests using Catch2. If you want to start learning on practice, just click follow this link…