in scripts/das_reader.py [0:0]
def decrypt_payload(payload, data_key):
my_key_provider = MyRawMasterKeyProvider(data_key)
my_key_provider.add_master_key("DataKey")
decrypted_plaintext, header = enc_client.decrypt(
source=payload,
materials_manager=aws_encryption_sdk.DefaultCryptoMaterialsManager(master_key_provider=my_key_provider))
return decrypted_plaintext