rev: add already solved challenges
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GPG Key ID:
9F2F7D8250F35146
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#!/usr/bin/env nix-shell
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#!nix-shell -i python3 -p python3
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# Hiding this really important number in an obscure piece of code is brilliant!
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# AND it's encrypted!
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# We want our biggest client to know his information is safe with us.
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bezos_cc_secret = "A:4@r%uL`M-^M0c0AbcM-MFE0g4dd`_cgN"
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# Reference alphabet
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alphabet = "!\"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ"+ \
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"[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~"
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def decode_secret(secret):
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"""ROT47 decode
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NOTE: encode and decode are the same operation in the ROT cipher family.
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"""
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# Encryption key
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rotate_const = 47
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# Storage for decoded secret
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decoded = ""
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# decode loop
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for c in secret:
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index = alphabet.find(c)
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original_index = (index + rotate_const) % len(alphabet)
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decoded = decoded + alphabet[original_index]
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print(decoded)
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def choose_greatest():
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"""Echo the largest of the two numbers given by the user to the program
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Warning: this function was written quickly and needs proper error handling
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"""
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user_value_1 = input("What's your first number? ")
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user_value_2 = input("What's your second number? ")
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greatest_value = user_value_1 # need a value to return if 1 & 2 are equal
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if user_value_1 > user_value_2:
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greatest_value = user_value_1
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elif user_value_1 < user_value_2:
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greatest_value = user_value_2
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print( "The number with largest positive magnitude is "
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+ str(greatest_value) )
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# NOTE: replaced function
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# choose_greatest()
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decode_secret(bezos_cc_secret)
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#!/usr/bin/env nix-shell
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#!nix-shell -i python3 -p python3 python3Packages.cryptography
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#============================================================================#
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#============================ARCANE CALCULATOR===============================#
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#============================================================================#
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import hashlib
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from cryptography.fernet import Fernet
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import base64
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# GLOBALS --v
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arcane_loop_trial = True
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jump_into_full = False
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full_version_code = ""
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username_trial = "MORTON"
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bUsername_trial = b"MORTON"
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key_part_static1_trial = "picoCTF{1n_7h3_|<3y_of_"
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key_part_dynamic1_trial = "xxxxxxxx"
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key_part_static2_trial = "}"
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key_full_template_trial = key_part_static1_trial + key_part_dynamic1_trial + key_part_static2_trial
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star_db_trial = {
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"Alpha Centauri": 4.38,
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"Barnard's Star": 5.95,
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"Luhman 16": 6.57,
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"WISE 0855-0714": 7.17,
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"Wolf 359": 7.78,
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"Lalande 21185": 8.29,
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"UV Ceti": 8.58,
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"Sirius": 8.59,
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"Ross 154": 9.69,
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"Yin Sector CL-Y d127": 9.86,
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"Duamta": 9.88,
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"Ross 248": 10.37,
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"WISE 1506+7027": 10.52,
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"Epsilon Eridani": 10.52,
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"Lacaille 9352": 10.69,
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"Ross 128": 10.94,
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"EZ Aquarii": 11.10,
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"61 Cygni": 11.37,
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"Procyon": 11.41,
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"Struve 2398": 11.64,
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"Groombridge 34": 11.73,
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"Epsilon Indi": 11.80,
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"SPF-LF 1": 11.82,
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"Tau Ceti": 11.94,
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"YZ Ceti": 12.07,
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"WISE 0350-5658": 12.09,
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"Luyten's Star": 12.39,
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"Teegarden's Star": 12.43,
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"Kapteyn's Star": 12.76,
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"Talta": 12.83,
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"Lacaille 8760": 12.88
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}
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def intro_trial():
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print("\n===============================================\n\
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Welcome to the Arcane Calculator, " + username_trial + "!\n")
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print("This is the trial version of Arcane Calculator.")
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print("The full version may be purchased in person near\n\
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the galactic center of the Milky Way galaxy. \n\
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Available while supplies last!\n\
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=====================================================\n\n")
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def menu_trial():
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print("___Arcane Calculator___\n\n\
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Menu:\n\
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(a) Estimate Astral Projection Mana Burn\n\
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(b) [LOCKED] Estimate Astral Slingshot Approach Vector\n\
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(c) Enter License Key\n\
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(d) Exit Arcane Calculator")
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choice = input("What would you like to do, "+ username_trial +" (a/b/c/d)? ")
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if not validate_choice(choice):
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print("\n\nInvalid choice!\n\n")
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return
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if choice == "a":
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estimate_burn()
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elif choice == "b":
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locked_estimate_vector()
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elif choice == "c":
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enter_license()
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elif choice == "d":
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global arcane_loop_trial
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arcane_loop_trial = False
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print("Bye!")
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else:
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print("That choice is not valid. Please enter a single, valid \
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lowercase letter choice (a/b/c/d).")
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def validate_choice(menu_choice):
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if menu_choice == "a" or \
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menu_choice == "b" or \
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menu_choice == "c" or \
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menu_choice == "d":
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return True
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else:
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return False
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def estimate_burn():
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print("\n\nSOL is detected as your nearest star.")
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target_system = input("To which system do you want to travel? ")
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if target_system in star_db_trial:
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ly = star_db_trial[target_system]
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mana_cost_low = ly**2
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mana_cost_high = ly**3
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print("\n"+ target_system +" will cost between "+ str(mana_cost_low) \
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+" and "+ str(mana_cost_high) +" stone(s) to project to\n\n")
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else:
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# TODO : could add option to list known stars
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print("\nStar not found.\n\n")
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def locked_estimate_vector():
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print("\n\nYou must buy the full version of this software to use this \
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feature!\n\n")
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def enter_license():
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user_key = input("\nEnter your license key: ")
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user_key = user_key.strip()
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global bUsername_trial
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if check_key(user_key, bUsername_trial):
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decrypt_full_version(user_key)
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else:
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print("\nKey is NOT VALID. Check your data entry.\n\n")
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def check_key(key, username_trial):
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global key_full_template_trial
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if len(key) != len(key_full_template_trial):
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return False
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else:
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# Check static base key part --v
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i = 0
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for c in key_part_static1_trial:
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if key[i] != c:
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return False
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i += 1
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# TODO : test performance on toolbox container
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# Check dynamic part --v
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if key[i] != hashlib.sha256(username_trial).hexdigest()[4]:
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return False
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else:
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i += 1
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if key[i] != hashlib.sha256(username_trial).hexdigest()[5]:
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return False
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else:
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i += 1
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if key[i] != hashlib.sha256(username_trial).hexdigest()[3]:
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return False
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else:
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i += 1
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if key[i] != hashlib.sha256(username_trial).hexdigest()[6]:
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return False
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else:
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i += 1
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if key[i] != hashlib.sha256(username_trial).hexdigest()[2]:
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return False
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else:
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i += 1
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if key[i] != hashlib.sha256(username_trial).hexdigest()[7]:
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return False
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else:
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i += 1
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if key[i] != hashlib.sha256(username_trial).hexdigest()[1]:
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return False
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else:
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i += 1
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if key[i] != hashlib.sha256(username_trial).hexdigest()[8]:
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return False
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return True
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def decrypt_full_version(key_str):
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key_base64 = base64.b64encode(key_str.encode())
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f = Fernet(key_base64)
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try:
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with open("keygenme.py", "w") as fout:
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global full_version
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global full_version_code
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full_version_code = f.decrypt(full_version)
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fout.write(full_version_code.decode())
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global arcane_loop_trial
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arcane_loop_trial = False
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global jump_into_full
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jump_into_full = True
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print("\nFull version written to 'keygenme.py'.\n\n"+ \
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"Exiting trial version...")
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except FileExistsError:
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sys.stderr.write("Full version of keygenme NOT written to disk, "+ \
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"ERROR: 'keygenme.py' file already exists.\n\n"+ \
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"ADVICE: If this existing file is not valid, "+ \
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"you may try deleting it and entering the "+ \
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"license key again. Good luck")
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def ui_flow():
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intro_trial()
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while arcane_loop_trial:
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menu_trial()
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# Encrypted blob of full version
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full_version = \
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b"""
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gAAAAABgT_nv3JrW2AMPOanzoOatT8tWrZSH9V2-H_-sY8RFTh1Vr9guvCw3iIUq7eVs4IhR2u6bI_HkJm6u5VK99vYIKXfthUYjQRMNmo6uMwqdK8ZYm3wH3Z2BlFNmGxMSXKmFhDQujSexuuMg5ZFIb5VhyZeUY4R9KubbghdUIlZ2hBeCpxef_ioNjM7VUKJEyJgxiAtPdMKSgT8y-FJsikUsw9Scbe8nH-bC856u_mqk6AKQnORLmxfsJykFMFm-wOh-unFnUvg9HiT6lYXCrFnXNEFEnq5djwM9H4iRXYwyO4XdHEqVcodEyE3HoPFOh24R9ATElafkxty16jECSabI7k608v6sk2Pxd-EAI0XEtjlVE5Qz-qdnoTIXEXXbwK8Bpw33JwRGJs-WduRmF2G5qVVAGONjaAc9CPXhawUkf2_sNMlnq6lqn7sBb2K7BiqW2Efc88pzfsOYvGQC94CBBhIUQTePRcZ_bUbsDLR8PrWlNQ28Vt6P45URpPDtxkUGQtixiQi9QlPThCFJs28XmApvRQQfJHdje45t2ELeVgn5YMi_FHQ98qgMudwXHXprigHAMmcB2rFPWWhAQn4sIrdL2In424RWO0qOhd9IJrU7DldcrmOMyvpHV87HzVgsRnI97Hn-jiVi_FemDWAsDGFwjaGbrxWUfr01ienDjlrXc-NC2x1Tt6jTHiFb2LbUqzGyjJ-m-5eCuqr1zh8_oCypnBB79XuKMGlngql0NQVEReZ9pDZd3Iax0TJVM55luvuCpjolarAJXz28Ynt5et1DHfnAQ1gQ4laW3ZtRL6TTp1vRpfllOURLpAxNrY03a7cMS5iIS7nXMgllh-uV9S1O3Ww4z_nPSh3q-1yKUilHfuXwdazGjBvfvwDSD3ZgvzgDmvQ-eCNV4I-oEHlAjqAiuwMvClU3Pr-mmBg257A8LHQlJJ7Rl6oYpW-B43esP6sQ2G66ofHbx4ZyUhqH5WC6jjoSuxyRFs6Z6wiNDztgkSdqbSc7iTxtF8oHBqPI_boBwr7YskpWmgwNFhWPzxGwyhMI2H38WGx1klLhNKsa4Ep9vcTuj_ltCL_QZkIgfgklf3QYGWBNLjIPBPkv1c0GqYMPkhnc4Libqdr8LXZJug2ry1s-H16d2U7_cjo9d8usNG2nNhUQvJ8d5I58r3IlioEUWjkUfWy4t3Aw8UN43iZ62MyzE7yzNIYMIwIxgB9qXmrFkh3pFnoZKlPHh7rjVBlbsIgPl64Ewi70P2AdkuDe7BXQ6kX4rdWm3i18ePWIX8n0WYz4eyGz41eRXU2hjyJeIz4Wi0rcjx39LS9BXWq4qHYnT3WNGzONy1ArEiNNiXYk61CyJiaCmFX2BZ5NL85O0ePD-bf7cn7KIWvTGqUoXIP-j1FAYvJy47myTITkurZ7YwEHIAk2sejWMltN-JeI6Jqu8nFKTl1h1sbNpCvAnJmSFczKN9fTJONndpK_PpPbUIilA1UHeqtsQfhNpyx1KK6xeFYyCa0V2sLDnHIHWREXMgcB99TUYSV0_DpbIvwQIaINt7cTDQWWvD7tyFXWltw7VqGAUCgtWYAOIoXj9ZxyOCwuIBHXGD8h8r_kBWx8GlN2Mn70ALuVpPWfR_Y55SHGy3KEUtgig92ms5758hdTQjbvb9wk9byAXvAwpltWQG86XlCIIZSM2vpDqpQ6l-8j_BBir_oXjjuaHQKEw3A3ISpLTP9ZKqcRuDAyeiNNNO_HuPK8hxNFzy7Zvu46tH3waLaPW_v_OivUOx7rP8YxocSv6ON_lwR4sRj3mvAk_WPbXpGQaRaNL813pp5aPzOkUAuod25H6esLw0Io7nCirZ3ZhPKfhtY0bakpTl2o5JJGe_2eEm_D6afBnhnkpEaJOsJhkPj7BXBZH9VJJlBWsHOV8WM3sgy1dBQjCP4C0ThSBhEUwq1mPIFKsvffKJgianCnk0fdmpFOLDJci9i5LDAB-sra6RM4y-HhV2gt3PSvyB_H0WDcdQhSZHVz6U_yNMucIW8-4YwdRwec6HGrNneiyIlacHlKO15PCwWBogndUApfLYrxKHHbxIU1sDybMlIEgBBu9_3gOStqXZu4zBDR93P-qYGz-0jrEHq3YVN9olBLx9yoOVI2AZ9m0PJwpKHYc2uZsciFy__dckefZ79zycUzeSKuKbhaZozQOvdLKwmtcB8y5n3_nwwN6-FQu9APoLqsZoaq3wT5QM6ax-_FS9XwzhqEunognjINxAXu660db73L710noV3CBT76aDY3hiV7fnYhQTfysI4SHQtnAzHXMbxYmNfbMnOALTAkQt7Yaiy_NGAr7jmNOAQwhHIW8eaOsCfhRPl7XjdM7pX2N4EM5cFAEphKWQ62f_3RhnyvaTDNmDXkde-_2FjfBMGirouVJL2rSA-icdD1pfkCKO7U0An5V7AUKuYDTZXTXE4DFWUIq4K36jFmHJ9fwllHoe1_A22RuP4DHm4o7TYEJIeo5UvaVc9Lfd6edWIn8KqDzhTz6TZLWlSbK_RnZlpCv3rdibpHzE-epOv1y5pDv08R8jWnVzHv0c3DgfJzWknRd-S5hIIOd5FEyCAx4NpOqYJjpD109ijZLzDMxuvml8QJmX2tplAp-5xGGiVAFPLse1Vo95f5Wsh8KXwnbNjFQSYf8AgskPp_2spP7rBpVvDrn6HJp7TvQY6mNZMXgLOWy8WHynKESedYkD7iQSHwZ5iMvJTVLDHjYbll0PZyI-Tsy7Q9ZP4ysdzkL5TwGwHa53UhUsiLQmhpkht4dKg3kqq-pA-f5PwKOWKCsKwtUyGFvz9gL7yDNNQwNpSaN2vBy5U8ulVA8SooM9SwmelNHOKvF2rmy6nOQ8mzt-vnnKqCTnc_4VgNakpw86IQVsw7VGQEGTNLD8ULL8bFkSlfICvDQKSLOPONExox17G4YuXFRpDCGoK3KLbM4oKQCi9QWPOL0jhovl0zu1j-XIY7IA2SX4C_Ie9MV27amQi7mwFHYpj3081isJOZd_cUxszijjqOFI71IBeHwSHj5wOnWRUHVLk-aOCT_rKKpae6mPyL0uJsIS1s0B62scEcn0wFa90pjuARSPhc35VCA9TFDcq6W0tAi4aNNzT-vgv4NkqfR6hh_jqs0irQZj7jtUh4OGbkaZljMovt7UYBKd9L4m5gmh1w672_Oif5pDU3YXMdc4FSp39f1wWDvHz0Uw7grUTlvLL3ge6f-Elxe2c0n56nWxs4qo4rqGY9c5BuIFxly_6iymzec33Yo8r0_L5VIRIoWl6lcZq-uIRdTl8mzbVDEoU7r1P6mvg3xUfKfF-Q-XnlfV23XNLSuIF3JF78DkjkNxdOP9dM4dCHbexa5yKeNqAan6Rq7LCnlxTGqP_lxpJO4GvU6npINZ1qjp9ydUveK-Ya7o6rfJqN1GbITvUdaMOFq00OfOsKdZXn7gB_I6el_O-YKJcx3W2X_im81FwT_8P-zW_jEdO-lmztiEyVEvUOFJJfAm-K_G4-HEYzROMPrgof708fnnxDaWGiUi0AtJeEk4sHvf2PTiE0517FcKadlELd_4R-eLKk9Wwu24faJ_R0Ej8NinIbeqCUTb0LkIKa5ChJbL4nXs9f019rUFewPDJhpVLy4nJywzVou9_7-DCMxUT3ld1PjfumXvAbYejzN4Ubue-yfBwPFe_U2YoLM-CyCPNXCbP8WKzCzzNwCcLf8OcQ6gbsyhi0Ul9urHnqWK93qVmPZLEVG9QBEmKPtN6FNWtNIomFiLnl6C9dwbSCWxUJWU_dP7tmVzundLgQhiZhgQz2T7ffSf1aNGSR5hklFayb-MyfOJm46EPx1hVVgqIcdxg7Ko4gt6rpjwAYRQ==
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"""
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# Enter main loop
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ui_flow()
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if jump_into_full:
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exec(full_version_code)
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#!/usr/bin/env nix-shell
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#!nix-shell -i python3 -p python3
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import hashlib
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print("picoCTF{1n_7h3_|<3y_of_", end="")
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username_trial = b'MORTON'
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print(hashlib.sha256(username_trial).hexdigest()[4], end="")
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print(hashlib.sha256(username_trial).hexdigest()[5], end="")
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print(hashlib.sha256(username_trial).hexdigest()[3], end="")
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print(hashlib.sha256(username_trial).hexdigest()[6], end="")
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print(hashlib.sha256(username_trial).hexdigest()[2], end="")
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print(hashlib.sha256(username_trial).hexdigest()[7], end="")
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print(hashlib.sha256(username_trial).hexdigest()[1], end="")
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print(hashlib.sha256(username_trial).hexdigest()[8], end="")
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print("}")
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@ -0,0 +1 @@
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灩捯䍔䙻ㄶ形楴獟楮獴㌴摟潦弸弰摤捤㤷慽
|
||||
|
|
@ -0,0 +1,19 @@
|
|||
#!/usr/bin/env nix-shell
|
||||
#!nix-shell -i python3 -p python3
|
||||
|
||||
# enc = ''.join([chr((ord(flag[i]) << 8) + ord(flag[i + 1])) for i in range(0, len(flag), 2)])
|
||||
|
||||
def decrypt(enc):
|
||||
result = []
|
||||
for x in enc:
|
||||
n = ord(x)
|
||||
result.append(chr((n & 0xFF00) >> 8))
|
||||
result.append(chr(n & 0xFF))
|
||||
|
||||
return "".join(result)
|
||||
|
||||
if __name__ == "__main__":
|
||||
with open('enc') as file:
|
||||
enc = file.read()
|
||||
|
||||
print(decrypt(enc))
|
||||
Loading…
Reference in New Issue