def atos(data, separator=' ', fmt='02X'):
""" Convert array of bytes to string
:param data: Data in bytes or bytearray type
:param separator: String separator
:param fmt: String format
:return string
"""
ret = ''
for x in data:
if fmt == 'c' and x not in printable.encode():
ret += '.'
continue
ret += ('{:' + fmt + '}').format(x)
ret += separator
return ret
def string_test(prop, allow_multiline=True):
""" Check if a property (byte array) is a string
Args:
prop: (libfdt or byte property)
Returns:
boolean: True if the property looks like a string
"""
if not len(prop):
return False
if prop[-1] != 0:
return False
byte = 0
while byte < len(prop):
bytei = byte
while byte < len( prop ) and \
prop[byte] != 0 and \
prop[byte] in printable.encode() and \
prop[byte] not in (ord('\r'), ord('\n')):
byte += 1
if prop[byte] in (ord('\r'), ord('\n')):
if allow_multiline:
byte += 1
continue
# if we broke walking through the positions, and
# we aren't on a null (multiple strings) or are
# where we started, then this isn't a string.
if prop[byte] != 0 or byte == bytei:
if byte + 3 < len(prop):
if prop[byte:byte + 3] == b'\xe2\x80\x9c' or prop[
byte:byte + 3] == b'\xe2\x80\x9d':
#print( "jumping ahead, looks like an escaped quote" )
byte += 3
continue
return False
byte += 1
return True
def is_string(data):
""" Check property string validity """
if not len(data):
return None
if data[-1] != 0:
return None
pos = 0
while pos < len(data):
posi = pos
while pos < len(data) and \
data[pos] != 0 and \
data[pos] in printable.encode() and \
data[pos] not in (ord('\r'), ord('\n')):
pos += 1
if data[pos] != 0 or pos == posi:
return None
pos += 1
return True
def is_string(data):
""" Check property string validity """
if not len(data):
return
if data[(-1)] != 0:
return
pos = 0
while pos < len(data):
posi = pos
while pos < len(data):
if data[pos] != 0:
if data[pos] in printable.encode():
if data[pos] not in (ord('\r'), ord('\n')):
pos += 1
if data[pos] != 0 or pos == posi:
return
else:
pos += 1
return True
def english_chi_squared(a):
letter_freq = {
'a': 8.167,
'b': 1.492,
'c': 2.782,
'd': 4.253,
'e': 12.70,
'f': 2.228,
'g': 2.015,
'h': 6.094,
'i': 6.966,
'j': 0.153,
'k': 0.772,
'l': 4.025,
'm': 2.406,
'n': 6.749,
'o': 7.507,
'p': 1.929,
'q': 0.095,
'r': 5.987,
's': 6.327,
't': 9.056,
'u': 2.758,
'v': 0.978,
'w': 2.360,
'x': 0.150,
'y': 1.974,
'z': 0.074,
}
letter_freq.update((k, v * len(a) / 100) for k, v in letter_freq.items())
for c in a:
if not c in printable.encode('UTF-8'):
return 1000 * 1000
return sum([
((letter_freq[l] - a.count(l.encode('UTF-8')))**2 / letter_freq[l])
for l in ascii_lowercase
])
# https://blog.shi1011.cn/ctf/2162
# http://s0rry.cn/archives/vnctf2022re-fu-xian#toc-head-6
from string import printable
_m = list(printable.encode())
_m.remove(10)
_m.remove(13)
_hex = lambda _d: "0x" + hex(_d)[2:].zfill(2) if _d > 15 else _d
_chr = lambda _v: hex(_v) if _v not in _m else "'{ch}'".format(ch=chr(_v))
maps = {
0x1: "nop",
0x2: "mov R[{num}], {right} ; {ch}",
0x3: "mov R[{num}], R[{right}]",
0x4: "mov R[{num}], Memory[{right}]",
0x5: "mov Memory[num] R[{right}]",
0x6: "push R[{num}]",
0x7: "pop R[{num}]",
0x8: "add R[{num}], R[{right}]",
0x9: "dec R[{num}], R[{right}]",
0xa: "div R[{num}], R[{right}]",
0xb: "mul R[{num}], R[{right}]",
0xc: "xor R[{num}], R[{right}]",
0xd: "jmp R[{num}]",
0xe: "cmp R[{num}] R[{right}], je R[19]",
0xf: "cmp R[{num}] R[{right}], jne R[19]",
0x10: "cmp R[{num}] R[{right}], jb R[19]",
0x11: "cmp R[{num}] R[{right}], ja R[19]",
0x62: "getchar R[{num}]",
0x63: "putchar R[{num}]",
0x64: "vm quit"
}
from base64 import b64decode
from string import printable
import numpy as np
from utilities import ecb_encrypt, randomkey
from challenge11 import tester
from challenge12 import get_blocksize
printable = printable.encode()
key = randomkey()
prefix = np.random.randint(0x100, size=np.random.randint(5, 10))
prefix = np.uint8(prefix).tostring()
unknown_string = b64decode(
b'Um9sbGluJyBpbiBteSA1LjAKV2l0aCBteSByYWctdG9wIGRvd24gc28gbXkgaGFpciBjYW4gYmxvdwpUaGUgZ2lybGllcyBvbiBzdGFuZGJ5IHdhdmluZyBqdXN0IHRvIHNheSBoaQpEaWQgeW91IHN0b3A/IE5vLCBJIGp1c3QgZHJvdmUgYnkK'
)
def encryptor(plaintext):
return ecb_encrypt(prefix + plaintext + unknown_string, key)
def get_prefix_complement(encryptor, bsize):
for prefcomp in range(bsize):
testtext = b'a' * (2 * bsize + prefcomp)
crypted = encryptor(testtext)
if crypted[bsize:2 * bsize] == crypted[bsize * 2:bsize * 3]:
break
# have the complement of the prefix len
return prefcomp
from six import BytesIO
from DateTime.DateTime import DateTime
from OFS.Folder import Folder
from OFS.Image import File
from Testing.ZopeTestCase import ZopeTestCase
from .common import FilesystemTestBase
from .common import TarballTester
from .conformance import ConformsToIChunkableExportContext
from .conformance import ConformsToIChunkableImportContext
from .conformance import ConformsToIExportContext
from .conformance import ConformsToIImportContext
from .conformance import ConformsToISetupContext
printable_bytes = printable.encode('utf-8')
digits_bytes = digits.encode('utf-8')
class DummySite(Folder):
pass
class DummyTool(Folder):
pass
class DummyPdataStreamIterator:
import re
from string import printable
import os
import queue
import subprocess
import discord
import asyncio
import threading
import time
from ...utils import DBView
from .base import GameSystem, GameError, JoinLeaveProhibited, GameEndException
from math import ceil, floor
printable_set = set(printable)
printable_bytes = printable.encode()
def avg(n):
return sum(n)/len(n)
class BackgroundGameExit(GameError):
pass
more_patterns = [
re.compile(r'\*+(MORE|more)\*+'), # Match ****MORE****
re.compile(r'.*\.\.\.+\s*$') # Match ....
]
score_patterns = [
re.compile(r'([0-9]+)/[0-9]+'),
re.compile(r'Score:[ ]*([-]*[0-9]+)'),
re.compile(r'([0-9]+):[0-9]+ [AaPp][Mm]'),
# coding: utf-8
import base64
import re
from collections import namedtuple
from string import printable as printable_charset
from typing import List
from pyshark.packet.packet import Packet
CreditCard = namedtuple("CreditCard", ['name', 'number'])
STRING_EXTRACT_REGEX = re.compile(b"[^" + printable_charset.encode() + b"]+")
class Credentials(object):
def __init__(self, username=None, password=None, hash=None, context=None):
self.username = username
self.password = password
self.hash = hash
self.context = context if context else {}
def __eq__(self, other):
for item in self.context:
if item not in other.context or self.context[
item] != other.context[item]:
return False
return self.username == other.username \
and self.password == other.password \
and self.hash == other.hash
from binascii import unhexlify
from collections import Counter
from string import ascii_letters, printable
from Crypto.Util.strxor import strxor_c
from utilities import highscore_xor
if __name__ == '__main__':
ciphertext = unhexlify(
b'1b37373331363f78151b7f2b783431333d78397828372d363c78373e783a393b3736'
)
key = highscore_xor(set(printable.encode()), ciphertext)
print(chr(key))
print(strxor_c(ciphertext, key))
from string import printable
from collections import Counter
import struct
import numpy as np
from Crypto.Cipher import AES
from Crypto.Util.strxor import strxor, strxor_c
most_common = set(b'etaoin shrdlu')
unprintable = set(range(0x100)).difference(set(printable.encode()))
def u32_bool(num):
return np.fromiter(((num & 2**i) // 2**i for i in range(31, -1, -1)),
np.bool)
def bool_u32(boolarr):
return (boolarr * np.power(2, np.arange(31, -1, -1))).sum()
def randomkey(size=16):
return np.uint8(np.random.randint(0x100, size=size)).tostring()
def highscore_xor(keyspace, ciphertext):
# returns the key with the highest number of characters in the most_common
# set, and no unprintable characters
# any character in the ciphertext is excluded as null byte generating
keyspace = keyspace.difference(set(ciphertext))
def nonprintable_to_dots():
printable_bytes = printable.encode()[:-5]
return bytes.join(
b'',
[bytes([c]) if c in printable_bytes else b'.' for c in range(256)])
cbd27e9b76c7ad85ae3f36cbe78e546d45327ed1a50787d9c3b989af27e62bf0
44ba660a6bd8ff6b11b3423f9f3bf0dff4550cc6eb7b2e8a09ed3d4694faeb83
5e07d6fdc602b0f9b99f6ea24c39e65835992faac400264c52449bc409cf4efa
7b774effe4a349c6dd82ad4f4f21d34c
c0828e0381730befd1f7a025057c74fb
c195aeabeeee007891190b9ff8a32c70
a87ff679a2f3e71d9181a67b7542122c
67d4143062b55c25f383c9fabbbf1422fad06a2fe0644b43da67c17886dd4bd4
b14a7b8059d9c055954c92674ce60032
50e721e49c013f00c62cf59f2163542a9d8df02464efeb615d31051b0fddc326
97fb5f8538b89f6c1accfd19836b65a73b61fbc2e0cbf84bb858a0fffa3f1592
1b16b1df538ba12dc3f97edbb85caa7050d46c148134290feba80f8236c83db9
24cafc74b88dfafb0524ecc85a76f8bd
3fffd018d2223020be85670d93f565b63df54a9ce3ed2cdf6347a61df016938c
2510c39011c5be704182423e3a695e91
582967534d0f909d196b97f9e6921342777aea87b46fa52df165389db1fb8ccf
cd0aa9856147b6c5b4ff2b7dfee5da20aa38253099ef1b4a64aced233c9afe29
d10b36aa74a59bcf4a88185837f658afaf3646eff2bb16c3928d0e9335e945d2""".split('\n')
table = {}
for L in range(1, 3):
print("calculating hashes of length", L)
for tup in product(chars.encode(), repeat=L):
s = bytearray(tup)
table[md5(s).digest().hex()] = s.decode()
table[sha256(s).digest().hex()] = s.decode()
for h in hashes:
print(table[h], end='')
from tarfile import TarInfo
from DateTime.DateTime import DateTime
from OFS.Folder import Folder
from OFS.Image import File
from .common import FilesystemTestBase
from .common import TarballTester
from .conformance import ConformsToISetupContext
from .conformance import ConformsToIImportContext
from .conformance import ConformsToIExportContext
from .conformance import ConformsToIChunkableExportContext
from .conformance import ConformsToIChunkableImportContext
printable_bytes = printable.encode('utf-8')
digits_bytes = digits.encode('utf-8')
class DummySite(Folder):
pass
class DummyTool(Folder):
pass
class DummyPdataStreamIterator:
def keygen(length=16):
return b''.join(
[bytes([i]) for i in random.choices(valid_chars.encode(), k=length)])
