dumb base256 encoding

base256.py

import re

class Base256:

    def __init__(self):
        self.list = [['aardvark','adroitness'],['absurd','adviser'],['accrue','aftermath'],['acme','aggregate'],['adrift','alkali'],['adult','almighty'],['afflict','amulet'],['ahead','amusement'],['aimless','antenna'],['Algol','applicant'],['allow','Apollo'],['alone','armistice'],['ammo','article'],['ancient','asteroid'],['apple','Atlantic'],['artist','atmosphere'],['assume','autopsy'],['Athens','Babylon'],['atlas','backwater'],['Aztec','barbecue'],['baboon','belowground'],['backfield','bifocals'],['backward','bodyguard'],['banjo','bookseller'],['beaming','borderline'],['bedlamp','bottomless'],['beehive','Bradbury'],['beeswax','bravado'],['befriend','Brazilian'],['Belfast','breakaway'],['berserk','Burlington'],['billiard','businessman'],['bison','butterfat'],['blackjack','Camelot'],['blockade','candidate'],['blowtorch','cannonball'],['bluebird','Capricorn'],['bombast','caravan'],['bookshelf','caretaker'],['brackish','celebrate'],['breadline','cellulose'],['breakup','certify'],['brickyard','chambermaid'],['briefcase','Cherokee'],['Burbank','Chicago'],['button','clergyman'],['buzzard','coherence'],['cement','combustion'],['chairlift','commando'],['chatter','company'],['checkup','component'],['chisel','concurrent'],['choking','confidence'],['chopper','conformist'],['Christmas','congregate'],['clamshell','consensus'],['classic','consulting'],['classroom','corporate'],['cleanup','corrosion'],['clockwork','councilman'],['cobra','crossover'],['commence','crucifix'],['concert','cumbersome'],['cowbell','customer'],['crackdown','Dakota'],['cranky','decadence'],['crowfoot','December'],['crucial','decimal'],['crumpled','designing'],['crusade','detector'],['cubic','detergent'],['dashboard','determine'],['deadbolt','dictator'],['deckhand','dinosaur'],['dogsled','direction'],['dragnet','disable'],['drainage','disbelief'],['dreadful','disruptive'],['drifter','distortion'],['dropper','document'],['drumbeat','embezzle'],['drunken','enchanting'],['Dupont','enrollment'],['dwelling','enterprise'],['eating','equation'],['edict','equipment'],['egghead','escapade'],['eightball','Eskimo'],['endorse','everyday'],['endow','examine'],['enlist','existence'],['erase','exodus'],['escape','fascinate'],['exceed','filament'],['eyeglass','finicky'],['eyetooth','forever'],['facial','fortitude'],['fallout','frequency'],['flagpole','gadgetry'],['flatfoot','Galveston'],['flytrap','getaway'],['fracture','glossary'],['framework','gossamer'],['freedom','graduate'],['frighten','gravity'],['gazelle','guitarist'],['Geiger','hamburger'],['glitter','Hamilton'],['glucose','handiwork'],['goggles','hazardous'],['goldfish','headwaters'],['gremlin','hemisphere'],['guidance','hesitate'],['hamlet','hideaway'],['highchair','holiness'],['hockey','hurricane'],['indoors','hydraulic'],['indulge','impartial'],['inverse','impetus'],['involve','inception'],['island','indigo'],['jawbone','inertia'],['keyboard','infancy'],['kickoff','inferno'],['kiwi','informant'],['klaxon','insincere'],['locale','insurgent'],['lockup','integrate'],['merit','intention'],['minnow','inventive'],['miser','Istanbul'],['Mohawk','Jamaica'],['mural','Jupiter'],['music','leprosy'],['necklace','letterhead'],['Neptune','liberty'],['newborn','maritime'],['nightbird','matchmaker'],['Oakland','maverick'],['obtuse','Medusa'],['offload','megaton'],['optic','microscope'],['orca','microwave'],['payday','midsummer'],['peachy','millionaire'],['pheasant','miracle'],['physique','misnomer'],['playhouse','molasses'],['Pluto','molecule'],['preclude','Montana'],['prefer','monument'],['preshrunk','mosquito'],['printer','narrative'],['prowler','nebula'],['pupil','newsletter'],['puppy','Norwegian'],['python','October'],['quadrant','Ohio'],['quiver','onlooker'],['quota','opulent'],['ragtime','Orlando'],['ratchet','outfielder'],['rebirth','Pacific'],['reform','pandemic'],['regain','Pandora'],['reindeer','paperweight'],['rematch','paragon'],['repay','paragraph'],['retouch','paramount'],['revenge','passenger'],['reward','pedigree'],['rhythm','Pegasus'],['ribcage','penetrate'],['ringbolt','perceptive'],['robust','performance'],['rocker','pharmacy'],['ruffled','phonetic'],['sailboat','photograph'],['sawdust','pioneer'],['scallion','pocketful'],['scenic','politeness'],['scorecard','positive'],['Scotland','potato'],['seabird','processor'],['select','provincial'],['sentence','proximate'],['shadow','puberty'],['shamrock','publisher'],['showgirl','pyramid'],['skullcap','quantity'],['skydive','racketeer'],['slingshot','rebellion'],['slowdown','recipe'],['snapline','recover'],['snapshot','repellent'],['snowcap','replica'],['snowslide','reproduce'],['solo','resistor'],['southward','responsive'],['soybean','retraction'],['spaniel','retrieval'],['spearhead','retrospect'],['spellbind','revenue'],['spheroid','revival'],['spigot','revolver'],['spindle','sandalwood'],['spyglass','sardonic'],['stagehand','Saturday'],['stagnate','savagery'],['stairway','scavenger'],['standard','sensation'],['stapler','sociable'],['steamship','souvenir'],['sterling','specialist'],['stockman','speculate'],['stopwatch','stethoscope'],['stormy','stupendous'],['sugar','supportive'],['surmount','surrender'],['suspense','suspicious'],['sweatband','sympathy'],['swelter','tambourine'],['tactics','telephone'],['talon','therapist'],['tapeworm','tobacco'],['tempest','tolerance'],['tiger','tomorrow'],['tissue','torpedo'],['tonic','tradition'],['topmost','travesty'],['tracker','trombonist'],['transit','truncated'],['trauma','typewriter'],['treadmill','ultimate'],['Trojan','undaunted'],['trouble','underfoot'],['tumor','unicorn'],['tunnel','unify'],['tycoon','universe'],['uncut','unravel'],['unearth','upcoming'],['unwind','vacancy'],['uproot','vagabond'],['upset','vertigo'],['upshot','Virginia'],['vapor','visitor'],['village','vocalist'],['virus','voyager'],['Vulcan','warranty'],['waffle','Waterloo'],['wallet','whimsical'],['watchword','Wichita'],['wayside','Wilmington'],['willow','Wyoming'],['woodlark','yesteryear'],['Zulu','Yucatán']]

    def lookup(self, str_in):
        for i, pair in enumerate(self.list):
            if str_in in pair:
                return i
        return None

    def encode(self, str_in):
        cleaned_str = re.sub(r'[^A-Za-z0-9]', '', str_in)
        char_list = list(cleaned_str)
        encoded_words = []
        for i in range(0, len(char_list), 4):
            chunk = char_list[i:i+4]
            if len(chunk) >= 2:
                index1 = int("".join(chunk[0:2]), 16)
                encoded_words.append(self.list[index1][0])
            if len(chunk) >= 4:
                index2 = int("".join(chunk[2:4]), 16)
                encoded_words.append(self.list[index2][1])
        return " ".join(encoded_words)

    def decode(self, str_in):
        words = str_in.split(' ')
        hex_values = []
        for word in words:
            index = self.lookup(word)
            if index is not None:
                hex_values.append(hex(index)[2:].zfill(2)) # [2:] to remove "0x", zfill to pad with 0
        hex_pairs = [''.join(hex_values[i:i+2]) for i in range(0, len(hex_values), 2)]
        return " ".join(hex_pairs)


b256 = Base256()

key = """
    E582 94F2 E9A2 2748 6E8B
    061B 31CC 528F D7FA 3F19 """

print(f"Starting String: {key}")
encoded = b256.encode(key)
print(f"Encoded: {encoded}")

decoded = b256.decode(encoded)
print(f"Decoded: {decoded}")