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#============================ARCANE CALCULATOR===============================#
#============================================================================#
import hashlib
from cryptography.fernet import Fernet
import base64
# GLOBALS --v
arcane_loop_trial = True
jump_into_full = False
full_version_code = ""
username_trial = "FRASER"
bUsername_trial = b"FRASER"
key_part_static1_trial = "picoCTF{1n_7h3_|<3y_of_"
key_part_dynamic1_trial = "xxxxxxxx"
key_part_static2_trial = "}"
key_full_template_trial = key_part_static1_trial + key_part_dynamic1_trial + key_part_static2_trial
star_db_trial = {
"Alpha Centauri": 4.38,
"Barnard's Star": 5.95,
"Luhman 16": 6.57,
"WISE 0855-0714": 7.17,
"Wolf 359": 7.78,
"Lalande 21185": 8.29,
"UV Ceti": 8.58,
"Sirius": 8.59,
"Ross 154": 9.69,
"Yin Sector CL-Y d127": 9.86,
"Duamta": 9.88,
"Ross 248": 10.37,
"WISE 1506+7027": 10.52,
"Epsilon Eridani": 10.52,
"Lacaille 9352": 10.69,
"Ross 128": 10.94,
"EZ Aquarii": 11.10,
"61 Cygni": 11.37,
"Procyon": 11.41,
"Struve 2398": 11.64,
"Groombridge 34": 11.73,
"Epsilon Indi": 11.80,
"SPF-LF 1": 11.82,
"Tau Ceti": 11.94,
"YZ Ceti": 12.07,
"WISE 0350-5658": 12.09,
"Luyten's Star": 12.39,
"Teegarden's Star": 12.43,
"Kapteyn's Star": 12.76,
"Talta": 12.83,
"Lacaille 8760": 12.88
}
def intro_trial():
print("\n===============================================\n\
Welcome to the Arcane Calculator, " + username_trial + "!\n")
print("This is the trial version of Arcane Calculator.")
print("The full version may be purchased in person near\n\
the galactic center of the Milky Way galaxy. \n\
Available while supplies last!\n\
=====================================================\n\n")
def menu_trial():
print("___Arcane Calculator___\n\n\
Menu:\n\
(a) Estimate Astral Projection Mana Burn\n\
(b) [LOCKED] Estimate Astral Slingshot Approach Vector\n\
(c) Enter License Key\n\
(d) Exit Arcane Calculator")
choice = input("What would you like to do, "+ username_trial +" (a/b/c/d)? ")
if not validate_choice(choice):
print("\n\nInvalid choice!\n\n")
return
if choice == "a":
estimate_burn()
elif choice == "b":
locked_estimate_vector()
elif choice == "c":
enter_license()
elif choice == "d":
global arcane_loop_trial
arcane_loop_trial = False
print("Bye!")
else:
print("That choice is not valid. Please enter a single, valid \
lowercase letter choice (a/b/c/d).")
def validate_choice(menu_choice):
if menu_choice == "a" or \
menu_choice == "b" or \
menu_choice == "c" or \
menu_choice == "d":
return True
else:
return False
def estimate_burn():
print("\n\nSOL is detected as your nearest star.")
target_system = input("To which system do you want to travel? ")
if target_system in star_db_trial:
ly = star_db_trial[target_system]
mana_cost_low = ly**2
mana_cost_high = ly**3
print("\n"+ target_system +" will cost between "+ str(mana_cost_low) \
+" and "+ str(mana_cost_high) +" stone(s) to project to\n\n")
else:
# TODO : could add option to list known stars
print("\nStar not found.\n\n")
def locked_estimate_vector():
print("\n\nYou must buy the full version of this software to use this \
feature!\n\n")
def enter_license():
user_key = input("\nEnter your license key: ")
user_key = user_key.strip()
global bUsername_trial
if check_key(user_key, bUsername_trial):
decrypt_full_version(user_key)
else:
print("\nKey is NOT VALID. Check your data entry.\n\n")
def check_key(key, username_trial):
global key_full_template_trial
if len(key) != len(key_full_template_trial):
return False
else:
# Check static base key part --v
i = 0
for c in key_part_static1_trial:
if key[i] != c:
return False
i += 1
# TODO : test performance on toolbox container
# Check dynamic part --v
if key[i] != hashlib.sha256(username_trial).hexdigest()[4]:
return False
else:
i += 1
if key[i] != hashlib.sha256(username_trial).hexdigest()[5]:
return False
else:
i += 1
if key[i] != hashlib.sha256(username_trial).hexdigest()[3]:
return False
else:
i += 1
if key[i] != hashlib.sha256(username_trial).hexdigest()[6]:
return False
else:
i += 1
if key[i] != hashlib.sha256(username_trial).hexdigest()[2]:
return False
else:
i += 1
if key[i] != hashlib.sha256(username_trial).hexdigest()[7]:
return False
else:
i += 1
if key[i] != hashlib.sha256(username_trial).hexdigest()[1]:
return False
else:
i += 1
if key[i] != hashlib.sha256(username_trial).hexdigest()[8]:
return False
return True
def decrypt_full_version(key_str):
key_base64 = base64.b64encode(key_str.encode())
f = Fernet(key_base64)
try:
with open("keygenme.py", "w") as fout:
global full_version
global full_version_code
full_version_code = f.decrypt(full_version)
fout.write(full_version_code.decode())
global arcane_loop_trial
arcane_loop_trial = False
global jump_into_full
jump_into_full = True
print("\nFull version written to 'keygenme.py'.\n\n"+ \
"Exiting trial version...")
except FileExistsError:
sys.stderr.write("Full version of keygenme NOT written to disk, "+ \
"ERROR: 'keygenme.py' file already exists.\n\n"+ \
"ADVICE: If this existing file is not valid, "+ \
"you may try deleting it and entering the "+ \
"license key again. Good luck")
def ui_flow():
intro_trial()
while arcane_loop_trial:
menu_trial()
# Encrypted blob of full version
full_version = \
b"""
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"""
# Enter main loop
ui_flow()
if jump_into_full:
exec(full_version_code)
|