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import asyncio
import os
from bson import json_util
from bson.codec_options import CodecOptions
from pymongo.encryption import Algorithm
from pymongo.encryption_options import AutoEncryptionOpts
from motor.motor_asyncio import AsyncIOMotorClient, AsyncIOMotorClientEncryption
async def create_json_schema_file(kms_providers, key_vault_namespace, key_vault_client):
client_encryption = AsyncIOMotorClientEncryption(
kms_providers,
key_vault_namespace,
key_vault_client,
# The CodecOptions class used for encrypting and decrypting.
# This should be the same CodecOptions instance you have configured
# on MotorClient, Database, or Collection. We will not be calling
# encrypt() or decrypt() in this example so we can use any
# CodecOptions.
CodecOptions(),
)
# Create a new data key and json schema for the encryptedField.
# https://dochub.mongodb.org/core/client-side-field-level-encryption-automatic-encryption-rules
data_key_id = await client_encryption.create_data_key(
"local", key_alt_names=["pymongo_encryption_example_1"]
)
schema = {
"properties": {
"encryptedField": {
"encrypt": {
"keyId": [data_key_id],
"bsonType": "string",
"algorithm": Algorithm.AEAD_AES_256_CBC_HMAC_SHA_512_Deterministic,
}
}
},
"bsonType": "object",
}
# Use CANONICAL_JSON_OPTIONS so that other drivers and tools will be
# able to parse the MongoDB extended JSON file.
json_schema_string = json_util.dumps(schema, json_options=json_util.CANONICAL_JSON_OPTIONS)
with open("jsonSchema.json", "w") as file:
file.write(json_schema_string)
async def main():
# The MongoDB namespace (db.collection) used to store the
# encrypted documents in this example.
encrypted_namespace = "test.coll"
# This must be the same master key that was used to create
# the encryption key.
local_master_key = os.urandom(96)
kms_providers = {"local": {"key": local_master_key}}
# The MongoDB namespace (db.collection) used to store
# the encryption data keys.
key_vault_namespace = "encryption.__pymongoTestKeyVault"
key_vault_db_name, key_vault_coll_name = key_vault_namespace.split(".", 1)
# The MotorClient used to access the key vault (key_vault_namespace).
key_vault_client = AsyncIOMotorClient()
key_vault = key_vault_client[key_vault_db_name][key_vault_coll_name]
# Ensure that two data keys cannot share the same keyAltName.
await key_vault.drop()
await key_vault.create_index(
"keyAltNames", unique=True, partialFilterExpression={"keyAltNames": {"$exists": True}}
)
await create_json_schema_file(kms_providers, key_vault_namespace, key_vault_client)
# Load the JSON Schema and construct the local schema_map option.
with open("jsonSchema.json") as file:
json_schema_string = file.read()
json_schema = json_util.loads(json_schema_string)
schema_map = {encrypted_namespace: json_schema}
auto_encryption_opts = AutoEncryptionOpts(
kms_providers, key_vault_namespace, schema_map=schema_map
)
client = AsyncIOMotorClient(auto_encryption_opts=auto_encryption_opts)
db_name, coll_name = encrypted_namespace.split(".", 1)
coll = client[db_name][coll_name]
# Clear old data
await coll.drop()
await coll.insert_one({"encryptedField": "123456789"})
decrypted_doc = await coll.find_one()
print(f"Decrypted document: {decrypted_doc}")
unencrypted_coll = AsyncIOMotorClient()[db_name][coll_name]
encrypted_doc = await unencrypted_coll.find_one()
print(f"Encrypted document: {encrypted_doc}")
if __name__ == "__main__":
asyncio.run(main())
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