This challenge gives us a Python script and instructs us to find the flag in it. Upon execution, the script opens a prompt window with three options: print encouragement, print flag, and quit.
When choosing option b to print the flag, the message “Oops! I must have misplaced the print_flag function! Check my source code!” is displayed. Upon checking the source code, I found two code snippets which jumped out at me:
def print_flag():
flag = str_xor(flag_enc, 'enkidu')
print(flag)
and
elif choice == 'b':
print('\nOops! I must have misplaced the print_flag function! Check my source code!\n\n')
which meant that the print_flag() function was being unused. By replacing the print statement under chioce B with an execution of print_flag() and then running the script again, the flag is displayed: picoCTF{7h3_r04d_l355_7r4v3l3d_ae0b80bd}
