snowflake-connector-python/test/test_unit_encryption_util.py at master · byule/snowflake-connector-python · GitHub

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#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# Copyright (c) 2012-2019 Snowflake Computing Inc. All right reserved.
#
import codecs
import glob
import os
import tempfile
from os import path

from snowflake.connector.compat import PY2
from snowflake.connector.constants import (UTF8)
from snowflake.connector.encryption_util import SnowflakeEncryptionUtil
from snowflake.connector.remote_storage_util import \
    SnowflakeFileEncryptionMaterial

THIS_DIR = path.dirname(path.realpath(__file__))


def test_encrypt_decrypt_file():
    """
    Encrypt and Decrypt a file
    """

    encryption_material = SnowflakeFileEncryptionMaterial(
        query_stage_master_key='ztke8tIdVt1zmlQIZm0BMA==',
        query_id='123873c7-3a66-40c4-ab89-e3722fbccce1',
        smk_id=3112)
    data = 'test data'
    input_fd, input_file = tempfile.mkstemp()
    encrypted_file = None
    decrypted_file = None
    try:
        with codecs.open(input_file, 'w', encoding=UTF8) as fd:
            fd.write(data)

        (metadata, encrypted_file) = SnowflakeEncryptionUtil.encrypt_file(
            encryption_material, input_file)
        decrypted_file = SnowflakeEncryptionUtil.decrypt_file(
            metadata, encryption_material, encrypted_file)

        contents = ''
        with codecs.open(decrypted_file, 'r', encoding=UTF8) as fd:
            for line in fd:
                contents += line
        assert data == contents, "encrypted and decrypted contents"
    finally:
        os.close(input_fd)
        os.remove(input_file)
        if encrypted_file:
            os.remove(encrypted_file)
        if decrypted_file:
            os.remove(decrypted_file)


def test_encrypt_decrypt_large_file(tmpdir, test_files):
    """
    Encrypt and Decrypt a large file
    """
    encryption_material = SnowflakeFileEncryptionMaterial(
        query_stage_master_key='ztke8tIdVt1zmlQIZm0BMA==',
        query_id='123873c7-3a66-40c4-ab89-e3722fbccce1',
        smk_id=3112)

    # generates N files
    number_of_files = 1
    number_of_lines = 10000
    tmp_dir = test_files(tmpdir, number_of_lines, number_of_files)

    files = glob.glob(os.path.join(tmp_dir, 'file*'))
    input_file = files[0]
    encrypted_file = None
    decrypted_file = None
    try:
        (metadata, encrypted_file) = SnowflakeEncryptionUtil.encrypt_file(
            encryption_material, input_file)
        decrypted_file = SnowflakeEncryptionUtil.decrypt_file(
            metadata, encryption_material, encrypted_file)

        contents = ''
        cnt = 0
        with codecs.open(decrypted_file, 'r', encoding=UTF8) as fd:
            for line in fd:
                contents += line
                cnt += 1
        assert cnt == number_of_lines, "number of lines"
    finally:
        os.remove(input_file)
        if encrypted_file:
            os.remove(encrypted_file)
        if decrypted_file:
            os.remove(decrypted_file)