updated sheesh

This commit is contained in:
lightningitoid
2025-10-27 07:46:35 +07:00
parent e7cfcbdf59
commit f61a42fa59
3 changed files with 164 additions and 150 deletions
+52 -51
View File
@@ -1,80 +1,77 @@
#!/usr/bin/env python3
import os, sys, signal, binascii, random
import os, sys, binascii, random
from Crypto.Cipher import AES
from Crypto.Util.Padding import pad, unpad
from Crypto.Util.number import bytes_to_long, long_to_bytes
random.seed(os.urandom(16))
K0 = os.urandom(16)
K1 = os.urandom(16)
S0 = os.urandom(16)
S1 = os.urandom(16)
M0 = os.urandom(16)
M1 = os.urandom(16)
k0 = os.urandom(16)
k1 = os.urandom(16)
s0 = os.urandom(16); S1 = os.urandom(16)
m0 = os.urandom(16); M1 = os.urandom(16)
with open("/flag.txt","rb") as f:
flag = f.read()
def hex_input(q):
s = input(q).strip()
try: return binascii.unhexlify(s)
try: return binascii.unhexlify(s)
except: print("err"); return None
def enc1(b16: bytes) -> bytes:
x = AES.new(K1, AES.MODE_ECB).encrypt(b16)
return bytes(a ^ b for a, b in zip(x, b16))
def xex(b16):
x = AES.new(k1, AES.MODE_ECB).encrypt(b16)
return bytes(a ^ b for a,b in zip(x, b16))
def enc2(iv: bytes, m: bytes) -> bytes:
return AES.new(K0, AES.MODE_CBC, iv=iv).encrypt(pad(m, 16))
def enc1(iv, msg):
return AES.new(k0, AES.MODE_CBC, iv=iv).encrypt(pad(msg,16))
def enc3(m: bytes) -> bytes:
return AES.new(K1, AES.MODE_CBC, iv=b"\x00"*16).encrypt(pad(m, 16))[-16:]
def dec1(iv, c):
return unpad(AES.new(k0, AES.MODE_CBC, iv=iv).decrypt(c), 16)
def T(iv: bytes, ct: bytes):
def enc2(msg):
return AES.new(k1, AES.MODE_CBC, iv=b"\x00"*16).encrypt(pad(msg,16))[-16:]
def F(iv, ct):
n = len(ct)
if n < 96 or (n & 15):
return None
v = memoryview(ct)
W = [bytes(v[i:i+16]) for i in range(0, n, 16)]
if n < 96 or (n & 15): return None
W = [ct[i:i+16] for i in range(0, n, 16)]
m = len(W)
r = ((iv[0] & 7) + 2) % m
if r:
W = W[r:] + W[:r]
digest = enc2(iv)
r = ((iv[0]^iv[-1]) & 7) + 2
r %= m
if r: W = W[r:] + W[:r]
j = 1 + (W[0][0] & 1)
if len(W) <= j:
return None
del W[j]
if len(W) < 2:
return None
if len(W) < 3: return None
A0 = long_to_bytes(bytes_to_long(W[0]) ^ bytes_to_long(m0))
A1 = long_to_bytes(bytes_to_long(W[1]) ^ bytes_to_long(M1))
j = 1 + (digest[0] & 1)
del W[j]
if len(W) < 2: return None
a0 = long_to_bytes(bytes_to_long(W[0]) ^ bytes_to_long(M0))
a1 = long_to_bytes(bytes_to_long(W[1]) ^ bytes_to_long(M1))
return b"".join((S0, a0, S1, a1, *W[2:]))
return b"".join((s0, A0, S1, A1, *W[2:]))
def C(iv: bytes, ct: bytes) -> bool:
z = T(iv, ct)
def O(iv, ct):
z = F(iv, ct)
if z is None:
ok = False
else:
try:
x = AES.new(K0, AES.MODE_CBC, iv=iv).decrypt(z)
unpad(x, 16)
dec1(iv, z)
ok = True
except:
ok = False
if random.random() < 0.08:
if random.random() < 0.10:
ok = not ok
return ok
iv = os.urandom(16)
MK = enc3(iv + iv)
H0 = (flag + b"\x00"*16)[:16]
H1 = bytes(a ^ b for a, b in zip(H0, MK))
pt = H1 + flag[16:]
ct = enc2(iv, pt)
MK = enc2(iv + iv)
h0 = (flag + b"\x00"*16)[:16]
h1 = bytes(a ^ b for a,b in zip(h0, MK))
pt = h1 + flag[16:]
ct = enc1(iv, pt)
print("iv:", iv.hex())
print("ct:", ct.hex())
@@ -82,17 +79,21 @@ print()
while True:
try:
blob = hex_input("blob: ")
if blob is None:
print("err\n"); continue
L = len(blob)
if L == 16:
y = enc1(blob)
inp = hex_input("inp: ")
if inp is None:
print("hmmm\n"); continue
L = len(inp)
if L == 16:
y = xex(inp)
print("blk:", y.hex()); print()
elif L >= 32 and (L % 16) == 0:
iv, ct = blob[:16], blob[16:]
print("ok\n" if C(iv, ct) else "no\n")
ivq, ctq = inp[:16], inp[16:]
print("ok\n" if O(ivq, ctq) else "zzz\n")
else:
print("err\n")
print("hmmm\n")
except EOFError:
break
+52 -51
View File
@@ -1,80 +1,77 @@
#!/usr/bin/env python3
import os, sys, signal, binascii, random
import os, sys, binascii, random
from Crypto.Cipher import AES
from Crypto.Util.Padding import pad, unpad
from Crypto.Util.number import bytes_to_long, long_to_bytes
random.seed(os.urandom(16))
K0 = os.urandom(16)
K1 = os.urandom(16)
S0 = os.urandom(16)
S1 = os.urandom(16)
M0 = os.urandom(16)
M1 = os.urandom(16)
k0 = os.urandom(16)
k1 = os.urandom(16)
s0 = os.urandom(16); S1 = os.urandom(16)
m0 = os.urandom(16); M1 = os.urandom(16)
with open("/flag.txt","rb") as f:
flag = f.read()
def hex_input(q):
s = input(q).strip()
try: return binascii.unhexlify(s)
try: return binascii.unhexlify(s)
except: print("err"); return None
def enc1(b16: bytes) -> bytes:
x = AES.new(K1, AES.MODE_ECB).encrypt(b16)
return bytes(a ^ b for a, b in zip(x, b16))
def xex(b16):
x = AES.new(k1, AES.MODE_ECB).encrypt(b16)
return bytes(a ^ b for a,b in zip(x, b16))
def enc2(iv: bytes, m: bytes) -> bytes:
return AES.new(K0, AES.MODE_CBC, iv=iv).encrypt(pad(m, 16))
def enc1(iv, msg):
return AES.new(k0, AES.MODE_CBC, iv=iv).encrypt(pad(msg,16))
def enc3(m: bytes) -> bytes:
return AES.new(K1, AES.MODE_CBC, iv=b"\x00"*16).encrypt(pad(m, 16))[-16:]
def dec1(iv, c):
return unpad(AES.new(k0, AES.MODE_CBC, iv=iv).decrypt(c), 16)
def T(iv: bytes, ct: bytes):
def enc2(msg):
return AES.new(k1, AES.MODE_CBC, iv=b"\x00"*16).encrypt(pad(msg,16))[-16:]
def F(iv, ct):
n = len(ct)
if n < 96 or (n & 15):
return None
v = memoryview(ct)
W = [bytes(v[i:i+16]) for i in range(0, n, 16)]
if n < 96 or (n & 15): return None
W = [ct[i:i+16] for i in range(0, n, 16)]
m = len(W)
r = ((iv[0] & 7) + 2) % m
if r:
W = W[r:] + W[:r]
digest = enc2(iv)
r = ((iv[0]^iv[-1]) & 7) + 2
r %= m
if r: W = W[r:] + W[:r]
j = 1 + (W[0][0] & 1)
if len(W) <= j:
return None
del W[j]
if len(W) < 2:
return None
if len(W) < 3: return None
A0 = long_to_bytes(bytes_to_long(W[0]) ^ bytes_to_long(m0))
A1 = long_to_bytes(bytes_to_long(W[1]) ^ bytes_to_long(M1))
j = 1 + (digest[0] & 1)
del W[j]
if len(W) < 2: return None
a0 = long_to_bytes(bytes_to_long(W[0]) ^ bytes_to_long(M0))
a1 = long_to_bytes(bytes_to_long(W[1]) ^ bytes_to_long(M1))
return b"".join((S0, a0, S1, a1, *W[2:]))
return b"".join((s0, A0, S1, A1, *W[2:]))
def C(iv: bytes, ct: bytes) -> bool:
z = T(iv, ct)
def O(iv, ct):
z = F(iv, ct)
if z is None:
ok = False
else:
try:
x = AES.new(K0, AES.MODE_CBC, iv=iv).decrypt(z)
unpad(x, 16)
dec1(iv, z)
ok = True
except:
ok = False
if random.random() < 0.08:
if random.random() < 0.10:
ok = not ok
return ok
iv = os.urandom(16)
MK = enc3(iv + iv)
H0 = (flag + b"\x00"*16)[:16]
H1 = bytes(a ^ b for a, b in zip(H0, MK))
pt = H1 + flag[16:]
ct = enc2(iv, pt)
MK = enc2(iv + iv)
h0 = (flag + b"\x00"*16)[:16]
h1 = bytes(a ^ b for a,b in zip(h0, MK))
pt = h1 + flag[16:]
ct = enc1(iv, pt)
print("iv:", iv.hex())
print("ct:", ct.hex())
@@ -82,17 +79,21 @@ print()
while True:
try:
blob = hex_input("blob: ")
if blob is None:
print("err\n"); continue
L = len(blob)
if L == 16:
y = enc1(blob)
inp = hex_input("inp: ")
if inp is None:
print("hmmm\n"); continue
L = len(inp)
if L == 16:
y = xex(inp)
print("blk:", y.hex()); print()
elif L >= 32 and (L % 16) == 0:
iv, ct = blob[:16], blob[16:]
print("ok\n" if C(iv, ct) else "no\n")
ivq, ctq = inp[:16], inp[16:]
print("ok\n" if O(ivq, ctq) else "zzz\n")
else:
print("err\n")
print("hmmm\n")
except EOFError:
break