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streanger/ascii_art_0_writeup.py

Created March 22, 2020 17:18
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ascii_art_0_writeup
Raw
ascii_art_0_writeup.py
import sys
import os
import json
from string import ascii_lowercase, ascii_uppercase, digits
import nclib
def read_json_to_dict(file):
with open(file) as f:
data = json.load(f)
return data
def write_to_json(file, data):
with open(file, 'w') as fp:
json.dump(data, fp, sort_keys=True, indent=4, ensure_ascii=False)
return True
def characters_map(s):
dictio = read_json_to_dict('dictio.json')
if s in list(dictio.keys()):
return dictio[s]
return False
def join_columns(data, start, stop):
return '\n'.join([''.join(line) for line in list(zip(*data[start:stop]))])
def create_dictio(s):
'''s is string'''
lines_list = [line for line in s.splitlines() if line.strip()] # remove white lines
stripped = '\n'.join([line for line in lines_list if line.strip()])
line_length = len(stripped.splitlines()[0])
swapped = list(zip(*[list(line) for line in stripped.splitlines()]))
equation = ''
start_key = 0
dictio = {}
for key, _ in enumerate(swapped):
character = join_columns(swapped, start_key, key+1)
character = '\n'.join([line for line in character.splitlines() if line.strip()])
print(character)
ask = input()
if ask.strip():
char_to_map = ask.strip()
dictio[character] = char_to_map
start_key = key+1
return dictio
def get_response(s):
'''s is string'''
lines_list = [line for line in s.splitlines() if line.strip()] # remove white lines
stripped = '\n'.join([line for line in lines_list if line.strip()])
line_length = len(stripped.splitlines()[0])
swapped = list(zip(*[list(line) for line in stripped.splitlines()]))
equation = ''
start_key = 0
for key, _ in enumerate(swapped):
character = join_columns(swapped, start_key, key+1)
character = '\n'.join([line for line in character.splitlines() if line.strip()])
value = characters_map(character)
if value:
equation += value
start_key = key+1
return equation
def map_all_characters():
# create dictionary for store all characters
try:
dictio = read_json_to_dict('dictio.json')
except:
dictio = {}
all_characters_set = set(ascii_lowercase + ascii_uppercase + digits)
while True:
nc = nclib.Netcat(('3.91.74.70', 1337), udp=False)
wait_newline = False
first_stuff = True
while True:
full_lines = b''
while True:
try:
line = nc.recvline()
except nclib.errors.NetcatError:
print('Connection dropped!')
print('\nFLAG:\n\t{}'.format(full_lines.decode('utf-8')))
sys.exit()
full_lines += line
if b'\r\n' in line:
wait_newline = True
if wait_newline and not b'\r\n' in line:
wait_newline = False
break
lines_list = [line.decode('utf-8') for line in full_lines.splitlines()]
if first_stuff:
lines_list = lines_list[3:]
first_stuff = False
else:
lines_list = [line[1:] if not key else line for key, line in enumerate(lines_list)]
s = '\n'.join(lines_list)
print(s)
break
# map characters here
ask = input('ask: ')
if ask == 'map':
mapped = create_dictio(s)
dictio = {**dictio, **mapped}
if ask == 'skip':
continue
if ask == 'break':
break
# check if we have all ascii_lowercase, ascii_uppercase and digits
dictio_values_set = set(dictio.values())
characters_left = all_characters_set.symmetric_difference(dictio_values_set)
print('characters_left: {}'.format(characters_left))
write_to_json('dictio.json', dictio)
print('dictio written to dictio.json')
return dictio
def main():
test_cmd = 'nc 3.91.74.70 1337' # ASCII ART 0, NEW IP
nc = nclib.Netcat(('3.91.74.70', 1337), udp=False)
wait_newline = False
first_stuff = True
while True:
full_lines = b''
while True:
try:
line = nc.recvline()
except nclib.errors.NetcatError:
print('Connection dropped!')
print('\nFLAG:\n\t{}'.format(full_lines.decode('utf-8')))
sys.exit()
full_lines += line
if b'\r\n' in line:
wait_newline = True
if wait_newline and not b'\r\n' in line:
wait_newline = False
break
lines_list = [line.decode('utf-8') for line in full_lines.splitlines()]
if first_stuff:
lines_list = lines_list[3:]
first_stuff = False
else:
lines_list = [line[1:] if not key else line for key, line in enumerate(lines_list)]
s = '\n'.join(lines_list)
print(s)
response = get_response(s)
print('response: {}'.format(response))
response_bytes = '{}'.format(response).encode('utf-8')
nc.sendline(response_bytes)
'''
response: wUUuFK
__ _ __ __ _ _
/ /_ | |__ / _| / _| (_) (_)
| '_ \ | '_ \ | |_ | |_ | | | |
| (_) || | | || _|| _| | | | |
\___/ |_| |_||_| |_| _/ | _/ |
|__/ |__/
response: 6hffjj
__ __ ____ _ _ _ _ _
\ \ / /| __ ) | || | | | (_)| |__
\ V / | _ \ | || |_ | | | || '_ \
| | | |_) ||__ _|| | | || |_) |
|_| |____/ |_| |_| _/ ||_.__/
|__/
response: YB4ljb
Connection dropped!
FLAG:
>securinets{w3ll_d0n3_g00d!!}
'''
return True
if __name__ == "__main__":
current_path = os.path.realpath(os.path.dirname(sys.argv[0]))
os.chdir(current_path)
# ********* solution *********
main()
# ********* create dictionary *********
# dictio = map_all_characters()
# ********* show dictio elements *********
# dictio = read_json_to_dict('dictio.json')
# for key, value in dictio.items():
# print(key, value)
# input()
Raw
dictio.json
{
" _ \n | |\n _ | |\n| |_| |\n \\___/ ": "J",
" _ \n __| |\n / _` |\n| (_| |\n \\__,_|": "d",
" _ \n / \\ \n / _ \\ \n / ___ \\ \n/_/ \\_\\": "A",
" _ \n (_)\n | |\n | |\n _/ |\n|__/ ": "j",
" __ \n / _|\n| |_ \n| _|\n|_| ": "f",
" __ \n / /_ \n| '_ \\ \n| (_) |\n \\___/ ": "6",
" __ _ \n / _` |\n| (_| |\n \\__, |\n |_|": "q",
" __ _ \n / _` |\n| (_| |\n \\__, |\n |___/ ": "g",
" __ _ \n / _` |\n| (_| |\n \\__,_|": "a",
" ___ \n / _ \\\n| __/\n \\___|": "e",
" ___ \n / __|\n| (__ \n \\___|": "c",
" ___ \n ( _ ) \n / _ \\ \n| (_) |\n \\___/ ": "8",
" ___ \n / _ \\ \n| (_) |\n \\__, |\n /_/ ": "9",
" ___ \n / _ \\ \n| (_) |\n \\___/ ": "o",
" ___ \n / _ \\ \n| | | |\n| |_| |\n \\__\\_\\": "Q",
" ___ \n / _ \\ \n| | | |\n| |_| |\n \\___/ ": "O",
" ____ \n / ___|\n| | \n| |___ \n \\____|": "C",
" ____ \n / ___|\n| | _ \n| |_| |\n \\____|": "G",
" _ \n(_)\n| |\n| |\n|_|": "i",
" _ \n/ |\n| |\n| |\n|_|": "1",
" _ \n| |\n| |\n| |\n|_|": "l",
" _ \n| |_ \n| __|\n| |_ \n \\__|": "t",
" _ \n| | __\n| |/ /\n| < \n|_|\\_\\": "k",
" _ \n| | \n| | \n| |___ \n|_____|": "L",
" _ \n| |__ \n| '_ \\ \n| | | |\n|_| |_|": "h",
" _ \n| |__ \n| '_ \\ \n| |_) |\n|_.__/ ": "b",
" _ _ \n| \\ | |\n| \\| |\n| |\\ |\n|_| \\_|": "N",
" _ _ \n| | | |\n| | | |\n| |_| |\n \\___/ ": "U",
" _ _ \n| | | |\n| |_| |\n \\__, |\n |___/ ": "y",
" _ _ \n| | | |\n| |_| |\n \\__,_|": "u",
" _ _ \n| | | |\n| |_| |\n| _ |\n|_| |_|": "H",
" _ _ \n| || | \n| || |_ \n|__ _|\n |_| ": "4",
" _ __\n| |/ /\n| ' / \n| . \\ \n|_|\\_\\": "K",
" _ __ \n| '__|\n| | \n|_| ": "r",
" _ __ \n| '_ \\ \n| | | |\n|_| |_|": "n",
" _ __ \n| '_ \\ \n| |_) |\n| .__/ \n|_| ": "p",
" _ __ ___ \n| '_ ` _ \\ \n| | | | | |\n|_| |_| |_|": "m",
" __ __ \n| \\/ |\n| |\\/| |\n| | | |\n|_| |_|": "M",
" ___ \n/ __|\n\\__ \\\n|___/": "s",
" ___ \n|_ _|\n | | \n | | \n|___|": "I",
" ____\n|_ /\n / / \n/___|": "z",
" ____ \n/ ___| \n\\___ \\ \n ___) |\n|____/ ": "S",
" ____ \n| _ \\ \n| | | |\n| |_| |\n|____/ ": "D",
" ____ \n| _ \\ \n| |_) |\n| _ < \n|_| \\_\\": "R",
" ____ \n| _ \\ \n| |_) |\n| __/ \n|_| ": "P",
" ____ \n| __ ) \n| _ \\ \n| |_) |\n|____/ ": "B",
" ____ \n| ___| \n|___ \\ \n ___) |\n|____/ ": "5",
" ____ \n|___ \\ \n __) |\n / __/ \n|_____|": "2",
" _____\n|__ /\n / / \n / /_ \n/____|": "Z",
" _____ \n| ___|\n| |_ \n| _| \n|_| ": "F",
" _____ \n| ____|\n| _| \n| |___ \n|_____|": "E",
" _____ \n|_ _|\n | | \n | | \n |_| ": "T",
" _____ \n|___ |\n / / \n / / \n /_/ ": "7",
" _____ \n|___ / \n |_ \\ \n ___) |\n|____/ ": "3",
"__ __\n\\ \\ / /\n \\ \\ /\\ / / \n \\ V V / \n \\_/\\_/ ": "W",
"__ __\n\\ \\ /\\ / /\n \\ V V / \n \\_/\\_/ ": "w",
"__ __\n\\ \\ / /\n \\ \\ / / \n \\ V / \n \\_/ ": "V",
"__ __\n\\ \\ / /\n \\ V / \n \\_/ ": "v",
"__ __\n\\ \\ / /\n \\ V / \n | | \n |_| ": "Y",
"__ __\n\\ \\/ /\n > < \n/_/\\_\\": "x",
"__ __\n\\ \\/ /\n \\ / \n / \\ \n/_/\\_\\": "X"
}
Raw
response.txt
_ ___ __ __ __ ___ ____
| | / _ \ | \/ | / /_ / _ \ |___ \
| | | | | || |\/| || '_ \ | (_) | __) |
| |___ | |_| || | | || (_) | \__, | / __/
|_____| \__\_\|_| |_| \___/ /_/ |_____|
response: LQM692
_ ____ _ _ __ __ _ _
| |_ |___ \ __| || | \ \/ /| | | |
| __| __) | / _` || | \ / | | | |
| |_ / __/ | (_| || |___ / \ | |_| |
\__||_____| \__,_||_____|/_/\_\ \___/
response: t2dLXU
____ _ _ ____ ____ ___
| _ \ | \ | || _ \ | _ \ ___ / _ \
| | | || \| || | | || |_) | / _ \| | | |
| |_| || |\ || |_| || _ < | __/| |_| |
|____/ |_| \_||____/ |_| \_\ \___| \___/
response: DNDReO
_ _ __ __
| | ___ __ __ ___ __| |\ \ / /
| | / _ \ \ \/ / / _ \ / _` | \ \ / /
| || (_) | > < | __/| (_| | \ V /
|_| \___/ /_/\_\ \___| \__,_| \_/
response: loxedV
_ ____ __ _
_ __ __ _ (_)|___ \ / /_ (_)
| '_ \ / _` || | __) || '_ \ | |
| |_) || (_| || | / __/ | (_) || |
| .__/ \__, ||_||_____| \___/ |_|
|_| |_|
response: pqi26i
_____ _ ____ _ _ _
|__ / (_)/ ___| | \ | |__ __ __| |
/ / | |\___ \ | \| |\ \/ / / _` |
/ /_ | | ___) || |\ | > < | (_| |
/____| _/ ||____/ |_| \_|/_/\_\ \__,_|
|__/
response: ZjSNxd
_ ____ _ _
/ \ / ___| (_) _ __ ___ _ __ / \
/ _ \ \___ \ | || '_ ` _ \ | '_ \ / _ \
/ ___ \ ___) | | || | | | | || |_) | / ___ \
/_/ \_\|____/ _/ ||_| |_| |_|| .__/ /_/ \_\
|__/ |_|
response: ASjmpA
_____ ____ _ _ _
|__ / ___ |___ \ _ _ | |__ | | | |
/ / / _ \ __) || | | || '_ \ | |_| |
/ /_ | __/ / __/ | |_| || |_) || _ |
/____| \___||_____| \__,_||_.__/ |_| |_|
response: Ze2ubH
____ _ _____ ____ _
| _ \ | |_ |___ || _ \ __ _ | |__
| | | || __| / / | |_) | / _` || '_ \
| |_| || |_ / / | __/ | (_| || | | |
|____/ \__| /_/ |_| \__, ||_| |_|
|_|
response: Dt7Pqh
____ _ _ __ ____ ___
|___ \ | |__ | |/ /__ __| ___| / _ \
__) || '_ \ | ' / \ \ / /|___ \ | | | |
/ __/ | |_) || . \ \ V / ___) || |_| |
|_____||_.__/ |_|\_\ \_/ |____/ \___/
response: 2bKv5O
____ ___ __ __ _ _ _
__ _ / ___| / _ \ \ \ / /| | | |(_)
/ _` |\___ \ | (_) | \ V / | | | || |
| (_| | ___) | \__, | | | | |_| || |
\__,_||____/ /_/ |_| \___/ |_|
response: aS9YUi
__ _
__ _ / /_ __ __| |__ __ _ _ _
/ _` || '_ \ \ \ / /| '_ \ / _` || | | |
| (_| || (_) | \ V / | | | || (_| || |_| |
\__, | \___/ \_/ |_| |_| \__, | \__,_|
|_| |___/
response: q6vhgu
____ _ ____ _____ ____ ____
| _ \ | | / ___|| ____|| ___| | _ \
| | | || | | | | _| |___ \ | | | |
| |_| || |___ | |___ | |___ ___) || |_| |
|____/ |_____| \____||_____||____/ |____/
response: DLCE5D
_ _ _
| \ | | _ __ | | _ _ _ _ _ _
| \| || '_ \ _ | || | | || | | || | | |
| |\ || |_) || |_| || |_| || |_| || |_| |
|_| \_|| .__/ \___/ \__, | \__, | \__,_|
|_| |___/ |___/
response: NpJyyu
_ ___ ___ ____
__ __| |__ |_ _| _ _ / _ \ / ___|
\ \ / /| '_ \ | | | | | || | | || | _
\ V / | |_) | | | | |_| || |_| || |_| |
\_/ |_.__/ |___| \__, | \__\_\ \____|
|___/
response: vbIyQG
_ _ __ __ __ _
___ | || | / _|\ \ / /| | __
/ _ \ _ | || | | |_ \ \ /\ / / | |/ /
| __/| |_| || |___ | _| \ V V / | <
\___| \___/ |_____||_| \_/\_/ |_|\_\
response: eJLfWk
____ _ _
__ __ / ___| _ __ __ _ | | | | _ __
\ \/ /| | _ | '_ \ / _` || |_| || '__|
> < | |_| || | | || (_| || _ || |
/_/\_\ \____||_| |_| \__,_||_| |_||_|
response: xGnaHr
_ ____ ____ _ _
| | | __ ) ___ | _ \ (_)/ |
| | | _ \ / _ \ | |_) || || |
| |___ | |_) || (_) || _ < | || |
|_____||____/ \___/ |_| \_\|_||_|
response: LBoRi1
_ _ ___
| | _ _ / \ ___ ___ |_ _|
| | | | | | / _ \ / __| / _ \ | |
| |___ | |_| | / ___ \ \__ \| __/ | |
|_____| \__, |/_/ \_\|___/ \___||___|
|___/
response: LyAseI
____ _____ ___ ____
|___ \ |_ _| / _ \ __ _ ___ | _ \
__) | | | | | | | / _` | / __|| |_) |
/ __/ | | | |_| || (_| || (__ | _ <
|_____| |_| \__\_\ \__, | \___||_| \_\
|_|
response: 2TQqcR
_ ____ ____ __ __ ___
/ \ _ __ / ___| | _ \ \ \ / / / _ \
/ _ \ | '_ \ \___ \ | | | | \ \ / / | | | |
/ ___ \ | | | | ___) || |_| | \ V / | |_| |
/_/ \_\|_| |_||____/ |____/ \_/ \___/
response: AnSDVO
_ _ _ _ ____ ____
| | | || | | | _ __ __ _ / ___|| __ )
| |_| || | | || '_ \ / _` || | _ | _ \
| _ || |_| || |_) || (_| || |_| || |_) |
|_| |_| \___/ | .__/ \__,_| \____||____/
|_|
response: HUpaGB
_ _ __ __ __ __
| | | | _ __ __ _ _ __ ___ | \/ |\ \ / /
| | | || '_ \ / _` || '_ ` _ \ | |\/| | \ \ / /
| |_| || |_) || (_| || | | | | || | | | \ V /
\___/ | .__/ \__, ||_| |_| |_||_| |_| \_/
|_| |___/
response: UpgmMV
____ ____ ___ _
/ ___|| _ \ |_ _| __ _ __| | ___
| | | |_) | | | / _` | / _` | / __|
| |___ | _ < | | | (_| || (_| || (__
\____||_| \_\|___| \__, | \__,_| \___|
|_|
response: CRIqdc
___
____ __ _ _ __ ___ / _ \ __ __ __ _
|_ / / _` || '_ ` _ \ | | | |\ \/ / / _` |
/ / | (_| || | | | | || |_| | > < | (_| |
/___| \__,_||_| |_| |_| \___/ /_/\_\ \__,_|
response: zamOxa
____ _ __ __ _
___ | ___| | |\ \ / / ___ | |__
/ _ \ |___ \ | | \ \ / / / _ \| '_ \
| (_) | ___) || | \ V / | __/| |_) |
\___/ |____/ |_| \_/ \___||_.__/
response: o5lVeb
__ __ __ __ __ _ _ _____
\ \ / / / _|\ \ / /(_)| | __|___ |
\ \ / / | |_ \ V / | || |/ / / /
\ V / | _| | | | || < / /
\_/ |_| |_| |_||_|\_\ /_/
response: VfYik7
___ _ ____ __ __ ___ _
( _ ) | |_ / ___|\ \/ / / _ \ / \
/ _ \ | __|| | _ \ / | | | | / _ \
| (_) || |_ | |_| | / \ | |_| | / ___ \
\___/ \__| \____|/_/\_\ \___/ /_/ \_\
response: 8tGXOA
____ _ _ __ __ _ _ ____
/ ___|| \ | || \/ || \ | | ___ |___ \
| | _ | \| || |\/| || \| |/ __| __) |
| |_| || |\ || | | || |\ |\__ \ / __/
\____||_| \_||_| |_||_| \_||___/|_____|
response: GNMNs2
___ _____ ____ _ _____
/ _ \ | ___|| _ \ _ __ ___ | |__ |___ /
| (_) || |_ | |_) || '_ ` _ \ | '_ \ |_ \
\__, || _| | _ < | | | | | || | | | ___) |
/_/ |_| |_| \_\|_| |_| |_||_| |_||____/
response: 9FRmh3
Connection dropped!
FLAG:
>securinets{w3ll_d0n3_g00d!!}
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