【靶场合集】CTF-第七届强网杯全国网络安全挑战赛：谍影重重3.0

"C:Program FilesWiresharktshark.exe" -r attach.pcapng -Y tcp -T fields -e data.data > data.txt

import hashlibfrom Crypto.Cipher import AESdef EVP_BytesToKey(password, key_len, iv_len):    m = []    i = 0    while len(b''.join(m)) < (key_len + iv_len):        md5 = hashlib.md5()        data = password        if i > 0:            data = m[i - 1] + password        md5.update(data)        m.append(md5.digest())        i += 1    ms = b''.join(m)    key = ms[:key_len]    iv = ms[key_len:key_len + iv_len]    return key, ivdef decrypt(cipher,password):    key_len = int(256 / 8)    iv_len = 16    key, _ = EVP_BytesToKey(password, key_len, iv_len)    cipher = bytes.fromhex(cipher)    iv = cipher[:iv_len]    real_cipher = cipher[iv_len:]    cipher = AES.new(key, AES.MODE_CFB, iv, segment_size=128)    a = cipher.decrypt(real_cipher)    return aif __name__ == "__main__":    cipher = 'e0a77dfafb6948728ef45033116b34fc855e7ac8570caed829ca9b4c32c2f6f79184e333445c6027e18a6b53253dca03c6c464b8289cb7a16aa1766e6a0325ee842f9a766b81039fe50c5da12dfaa89eacce17b11ba9748899b49b071851040245fa5ea1312180def3d7c0f5af6973433544a8a342e8fcd2b1759086ead124e39a8b3e2f6dc5d56ad7e8548569eae98ec363f87930d4af80e984d0103036a91be4ad76f0cfb00206'    with open('password.txt','rb') as f:        lines = f.readlines()    for line in lines:        plain = decrypt(cipher,line.strip())        if b'HTTP' in plain:            with open('data.txt', 'rb') as f1:                lines1 = f1.readlines()                print('密码：'+ line.decode())            for line1 in lines1:                try:                    plain1 = decrypt(line1.decode(), line.strip())                    print(plain1.decode('utf-8'))                except:                    plain1 = decrypt(line1.decode(), line.strip())                    print(plain1)

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