```# Solve the task using SageMath. # command used to extract matrix and vector data :)# tshark -r a.pcap -Y "data.len>0" -T fields -e tcp.stream -e data
p = 340282366920938463463374607431768211297f = open('dump.txt')import reA = []b = []lines = f.readlines()for i in range(len(lines)):    if i % 3 == 2:		items = re.split('\\s+', lines[i].strip())        ciphertext = items[1].decode('hex').split('\n')[1].strip().decode('hex')    elif i % 3 == 0:        nums = re.split('\\s+', lines[i].strip())        nums = nums[1].strip().decode('hex')        nums = nums.split()        nums = map(int, nums)        A.extend(nums)    else:        nums = re.split('\\s+', lines[i].strip())        nums = nums[1].strip().decode('hex')        b.append(int(nums))
A = matrix(GF(p), 40, A)b = vector(GF(p), b)key = A.solve_right(b)
from hashlib import sha256from Crypto.Cipher import AES
aeskey = sha256(' '.join(map(str, key)).encode('utf-8')).digest()cipher = AES.new(aeskey, AES.MODE_CFB, '\x00'*16)
print [cipher.decrypt(ciphertext)]```