You know, during the entire 90s when the people that wrote it were around, they used to say that the Article 5 said this. But nowadays it's consensus over all the influential judges that it doesn't and only registered journalists can say things, and only congresspeople can have their opinions. So, who knows...
Anyway, it still says that decisions should be informed to the punished party and people should be able to defend themselves in a court.
"IV - é livre a manifestação do pensamento, sendo vedado o anonimato;"
"IX - é livre a expressão da atividade intelectual, artística, científica e de comunicação, independentemente de censura ou licença;"
You can see translated versions under "Art 5" here: https://www.constituteproject.org/constitution/Brazil_2017