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March 30, 2023 18:13
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Python laravel encryption
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| from Crypto import Random | |
| from Crypto.Cipher import AES | |
| import base64 | |
| import json | |
| from phpserialize import unserialize, dumps | |
| import hmac | |
| import hashlib | |
| class LaravelEncryption: | |
| def __init__(self, key): | |
| # self.key = key | |
| AES.block_size = 16 | |
| self.key = base64.b64decode(key) | |
| def decrypt(self, text): | |
| decoded_text = base64.b64decode(text) | |
| decoded_text = json.loads(decoded_text) | |
| iv = base64.b64decode(decoded_text['iv']) | |
| crypt_object = AES.new(key=self.key, mode=AES.MODE_CBC, IV=iv) | |
| decoded = base64.b64decode(decoded_text['value']) | |
| decrypted = crypt_object.decrypt(decoded) | |
| return unserialize(decrypted).decode('UTF-8') | |
| def encrypt(self, text): | |
| iv = Random.new().read(AES.block_size) | |
| text = dumps(text) | |
| padding = 16 - len(text) % 16 | |
| text += bytes(chr(padding) * padding, 'utf-8') | |
| cipher = AES.new(self.key, mode=AES.MODE_CBC, IV=iv) | |
| value = base64.b64encode(cipher.encrypt(text)) | |
| iv = base64.b64encode(iv) | |
| mac = hmac.new(self.key, iv + value, hashlib.sha256).hexdigest() | |
| dic = {'iv': iv.decode(), 'value': value.decode(), 'mac': mac} | |
| return base64.b64encode(bytes(json.dumps(dic), 'utf-8')).decode('UTF-8') |
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| from app.utils.laravel_encryption import LaravelEncryption | |
| key = b'QhGi88ju4rsBrtLRRalWvTvMoux7/7AnkvJZ49y9Q3M=' | |
| message = '{"message":"hello world"}' | |
| def test_should_decrypt_from_laravel(): | |
| # arrange | |
| encrypted = 'eyJpdiI6IitnRUVva2tNckhwdHMzeFlVOWl5TlE9PSIsInZhbHVlIjoiSURHb1VhY0ZRZVZIdm1ZRTJ1TDhXZC9rMGVqUVY5MnRpN3BoSHc4UzZsZVJnUFpyZVRidDE0UEtJMXFxOWxpNiIsIm1hYyI6ImViMDM5ZDE4NTg3MWNiYmZlYzM0NjNiYmZjNTVkMTQ4N2M2ODdjYTU2ZDgxOGYwNTM0MDllNDQzYmI3ZWIyNmEifQ==' | |
| # action | |
| result = LaravelEncryption(key).decrypt(encrypted) | |
| # assert | |
| assert message == result | |
| def test_should_encrypt_from_laravel(): | |
| # action | |
| result = LaravelEncryption(key).encrypt(message) | |
| result = LaravelEncryption(key).decrypt(result) | |
| # assert | |
| assert result == message |
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