pip install dingtalk_crypto

安装。
使用方法，可以参考下面的测试代码：

# -*- 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(
 '4g5jqlyl3zvetqxz5jiocdr586fn2zvjpa8zls3ij',
 '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