.json 打印数据不遵循 Python 中的字典顺序

Question

我正在分析一些实时捕获的数据，以解析一些 TLS Client Hello 信息。捕获和分析数据后，我使用 python.

中的字典将 output.txt 文件中的信息打印为 .json 格式

我的问题是 关于 output.txt 文件中的 .json 输出。数据未按顺序打印，这意味着它不遵守字典中数据的顺序 (output_dictionary.py)。

我用于 .json 输出的词典：

output_dictionary.py

HANDSHAKE = {
    "Client_Hello" : {
        'Length': 'unknown',
        'Version': 'unknown', 
        'Random': 'unknown', 
        'Session ID': 'unknown', 
        'Session ID Length': 'unknown', 
        'Cipher Suites Length': 'unknown',
        'Cipher Suites': 'unknown', 
        'Compression Method': 'unknown'
        }
    }

填充字典以便将其打印为 .json 并调用 json_read("output.txt") 的函数：

def parse_client_hello(handshake):
    if isinstance(handshake.data, dpkt.ssl.TLSClientHello):
        client = dpkt.ssl.TLSClientHello(str(handshake.data))
        **HANDSHAKE["Client_Hello"]['Length'] = len(client)**
        **HANDSHAKE["Client_Hello"]['Version'] = tls_dictionary('tls_version',client.version)**
        
        **HANDSHAKE["Client_Hello"]['Random'] = hexlify(client.random)**
        
        session_id, pointer = parse(client.data, 1)
        **HANDSHAKE["Client_Hello"]['Session ID'] = hexlify(session_id)**
        **HANDSHAKE["Client_Hello"]['Session ID Length'] = len(session_id)**
        
        ciphersuites, pointer1 = parse(client.data[pointer:], 2)
        ciphersuites, pretty_cipher_suites = parse_ciphers_compressions(ciphersuites, 'cipher_suites')
        **HANDSHAKE["Client_Hello"]['Cipher Suites Length'] = len(ciphersuites)**
        **HANDSHAKE["Client_Hello"]['Cipher Suites'] = pretty_cipher_suites**
        
        pointer += pointer1 
        compression_methods, pointer1 = parse(client.data[pointer:], 1)
        compression_methods, pretty_compressions = parse_ciphers_compressions(compression_methods,
            'compression_methods')
        **HANDSHAKE["Client_Hello"]['Compression Method'] = pretty_compressions**

        json_read("output.txt")

将字典转换为.json格式的json.read函数：

def json_read(filename):
    with open(filename, "a") as f:
        json.dump(HANDSHAKE, f, indent = 4)

数据如何以 .json 格式打印在 ouput.txt 文件中：

{
    "Client_Hello": {
        "Session ID Length": 32, 
        "Length": 236, 
        "Version": "TLS 1.2", 
        "Handshake Type": "Client Hello : 1", 
        "Compression Method": [
            "null"
        ], 
        "Session ID": "3eadfb1c6243f6aa70a880af598d52873e1fe049f15c3a7e2e6f4a3e4b58fc0e", 
        "Random": "502143b34cab4a59f947a8da76f58e66215bf709e85f71f7cbfa4ead8e99736b", 
        "Cipher Suites Length": 15, 
        "Cipher Suites": [
            "TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256", 
            "TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256", 
            "TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256", 
            "TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256", 
            "TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384", 
            "TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384", 
            "TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA", 
            "TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA", 
            "TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA", 
            "TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA", 
            "TLS_RSA_WITH_AES_128_GCM_SHA256", 
            "TLS_RSA_WITH_AES_256_GCM_SHA384", 
            "TLS_RSA_WITH_AES_128_CBC_SHA", 
            "TLS_RSA_WITH_AES_256_CBC_SHA", 
            "TLS_RSA_WITH_3DES_EDE_CBC_SHA"
        ]
    }
}

问题是 .json 打印的数据不遵守字典顺序，这意味着首先它应该打印长度、版本、随机数等。有办法解决这个问题吗？

Answer 1

基本上你的问题归结为“保持 keys/values 与初始化字典时声明的顺序相同”。为此，您必须使用 OrderedDict。 OrderedDict 维护您的密钥插入的顺序。

对于您的情况，您可以像下面这样初始化 HANDSHAKE 字典：

from collections import OrderedDict
client_hello_params = ['Length', 'Version', 'Random', 'Session ID', 'Session ID Length', 'Cipher Suites Length', 'Cipher Suites', 'Compression Method']
HANDSHAKE = {
"Client_Hello": OrderedDict((param, 'unknown') for param in client_hello_params)

现在您可以通过更改 client_hello_params 列表中的顺序来保留您想要的任何顺序。

打印这将打印您想要的结果，例如。

import json
HANDSHAKE["Client_Hello"]['Length'] = 10
print(json.dumps(HANDSHAKE))
{"Client_Hello": {"Length": 10, "Version": "unknown", "Random": "unknown", "Session ID": "unknown", "Session ID Length": "unknown", "Cipher Suites Length": "unknown", "Cipher Suites": "unknown", "Compression Method": "unknown"}}

.json 打印数据不遵循 Python 中的字典顺序

The .json printed data doesn't respect the dictionary order in Python

python

dictionary

package.json