Abdelfettah Besbes

42sh is a Unix Shell Interpreter which is compliant with the POSIX standard. It is totally coded from scratch in C language with very strict limitation of allowed functions from the C-Standard Library. The line editing features and the vim mode are implemented by the help of the Termcaps library knowing that Ncurses library is forbidden. Additionally Lex/Yacc are also forbidden so I had to code the Lexer/Parser from scratch for lexical, syntactic and semantic analysis. The most challenging and exciting part of this project is implementing the Job Control feature.

T-Auth is a Biometrics Authentication as a Service, which can be integrated in any web client application to enable behavioral biometric authentication. A listener interface is implemented in the client application to record keystroke dynamics statistics about keys a user presses and turns them into typing patterns. And then it sends them to the authentication server which analyzes and verifies the recorded typing patterns against previous patterns from the real user. The results (Similarity Score) are sent back to the client application to decide about authenticating the user. It was an exciting project but what I have enjoyed more was the implementation of the authorization server using OAuth2.0 standard protocol with JWT.