Python makes DingTalk encryption/decryption tool

It’s been a long time since I wrote a technical blog. I’ve been studying knowledge lately and haven’t summarized anything worth sharing, so I’ve stopped writing until now. The recent work is related to the development of DingTalk. The official does not provide any Python SDK, so I can only write it all by myself. Now I will share the "encryption/decryption/signature" part that is relatively time-consuming to implement, hoping to help some people.

For the specific mechanism of encryption/decryption, please refer to the official documentation.

To install this extension in your project, you can use:

pip install dingtalk_crypto

to install.

How to use it, you can refer to the following test code:

# -*- coding: utf-8 -*-

import json
from dingtalk_crypto import DingTalkCrypto

# 这个是钉钉官方给的测试数据
# @see https://open-doc.dingtalk.com/doc2/detail.htm?treeId=175&articleId=104945&docType=1#s14 encrypt_text = '1a3NBxmCFwkCJvfoQ7WhJHB+iX3qHPsc9JbaDznE1i03peOk1LaOQoRz3+nlyGNhwmwJ3vDMG' \
        '+OzrHMeiZI7gTRWVdUBmfxjZ8Ej23JVYa9VrYeJ5as7XM/ZpulX8NEQis44w53h1qAgnC3PRzM7Zc' \
        '/D6Ibr0rgUathB6zRHP8PYrfgnNOS9PhSBdHlegK+AGGanfwjXuQ9+0pZcy0w9lQ=='

crypto = DingTalkCrypto(
  '4g5j64qlyl3zvetqxz5jiocdr586fn2zvjpa8zls3ij',
  '123456',
  'suite4xxxxxxxxxxxxxxx'
)

signature = '5a65ceeef9aab2d149439f82dc191dd6c5cbe2c0'
timestamp = '1445827045067'
nonce = 'nEXhMP4r'

class TestCrypto:
  def test_decrypt(self):
    randstr, length, msg, suite_key = crypto.decrypt(encrypt_text)
    msg = json.loads(msg)

    assert msg['EventType'] == 'check_create_suite_url'
    assert msg['Random'] == 'LPIdSnlF'
    assert suite_key == 'suite4xxxxxxxxxxxxxxx'

  def test_encode(self):
    encrypt_msg = crypto.encrypt('hello world')
    randstr, length, msg, suite_key = crypto.decrypt(encrypt_msg)
    assert msg == 'hello world'

  def test_check_signature(self):
    assert crypto.check_signature(encrypt_text, timestamp, nonce, signature)

  def test_sign(self):
    msg = crypto.encrypt('hello world')
    actual_sig, actual_time, actual_nonce = crypto.sign(msg)
    assert True

Finally, post the source code address of the project, hoping to have some exchanges.

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