pyjail, N-CTF 2019

pyjail.py

#! /usr/bin/python3
#-*- coding:utf-8 -*-
def main():
    print("Hi! Welcome to pyjail!")
    print("========================================================================")
    print(open(__file__).read())
    print("========================================================================")
    print("RUN")
    text = input('>>> ')
    for keyword in ['eval', 'exec', 'import', 'open', 'os', 'read', 'system', 'write']:
        if keyword in text:
            print("No!!!")
            return;
    else:
        exec(text)
if __name__ == "__main__":
    main()