an executable to install the software

installer-main.py

@@ -0,0 +1,57 @@
+import base64
+
+KEY = "r0btcc"
+cryptnumb = int(input("Entrez votre profil (2 chiffres) : "))
+SHIFT = 39 % cryptnumb
+
+def caesar(text, shift_amount):
+    out = []
+    for c in text:
+        if 'A' <= c <= 'Z':
+            out.append(chr((ord(c) - ord('A') + shift_amount) % 26 + ord('A')))
+        elif 'a' <= c <= 'z':
+            out.append(chr((ord(c) - ord('a') + shift_amount) % 26 + ord('a')))
+        else:
+            out.append(c)
+    return ''.join(out)
+
+def encrypt(plain):
+    b64 = base64.b64encode(plain.encode('utf-8')).decode('utf-8')
+    with_key = b64 + KEY
+    final = caesar(with_key, SHIFT)
+    return final
+
+def decrypt(cipher):
+    unshifted = caesar(cipher, -SHIFT)
+    if not unshifted.endswith(KEY):
+        raise ValueError("Clé invalide ou texte corrompu.")
+    b64 = unshifted[:-len(KEY)]
+    try:
+        decoded = base64.b64decode(b64.encode('utf-8')).decode('utf-8')
+    except Exception as e:
+        raise ValueError("Erreur de décodage : " + str(e))
+    return decoded
+
+while True:
+    print("\nChoisissez votre choix :")
+    print("- Encrypt (1)")
+    print("- Decrypt (2)")
+    print("- Quitter (3)")
+    choice = input("Entrez votre choix (1, 2 ou 3) : ").strip()
+
+    if choice == '1':
+        msg = input("Entrez le message à encoder : ")
+        out = encrypt(msg)
+        print("Message encodé :", out)
+    elif choice == '2':
+        cipher = input("Entrez le texte encodé : ")
+        try:
+            out = decrypt(cipher)
+            print("Message décodé :", out)
+        except ValueError as err:
+            print("Erreur :", err)
+    elif choice == '3':
+        print("BYE")
+        break
+    else:
+        print("Choix invalide. Réessayez.")