CTF流量题解http3.pcapng

import binascii
import struct

crcbp = open("1.png", "rb").read()
for i in range(6000):
    for j in range(6000):
        data = crcbp[12:16] + struct.pack('>i', i)+struct.pack('>i', j)+crcbp[24:29]
        crc32 = binascii.crc32(data) & 0xffffffff
        if(crc32 == 0xEB1EA007):
            print(i, j)
            print('hex:', hex(i), hex(j))

导出后，发现了一张png图片。

尝试用 010 Editor工具进行打开。

import binascii
import struct

crcbp = open("2.png", "rb").read()
for i in range(6000):
    for j in range(6000):
        data = crcbp[12:16] + struct.pack('>i', i)+struct.pack('>i', j)+crcbp[24:29]
        crc32 = binascii.crc32(data) & 0xffffffff
        if(crc32 == 0xEB1EA007):
            print(i, j)
            print('hex:', hex(i), hex(j))