crypto
Hardcore
模2同余方程组
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| from pwn import *
def foo(l):
return ''.join([str(i) for i in l])
import numpy as np
a=np.identity(256,dtype=np.int64)
r=remote('ctf.b01lers.com',9003)
r.sendline('1')
s=b''
r.recvuntil('answer.\n')
for i in range(256):
print(i,s)
r.sendline(foo(a[i]))
s+=r.recvline().strip()
print(s)
r.interactive()
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| from Crypto.Util.number import *
a=0b0110001001100011011101000110011001111011011001000110111101011111011110010110111101110101010111110110110001101001011010110110010101011111011010000110000101110010011001000110001101101111011100100110010101011111011000110110100001100001011011000111001101111101
print(long_to_bytes(a))
|