secretbox 2.6.3

A library that offers a simple method of loading and accessing environmental variables and `.env` file values.

secretbox

A library that offers a simple method of loading and accessing environmental variables, .env file values, and other sources of secrets. The class stores values to state when load methods are called.

Loaded values are also injected into the local environ. This is to assist with adjacent libraries that reference os.environ values by default. Required values can be kept in a .env file instead of managing a script to load them into the environment.

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Requirements

• Python >=3.7

Optional Dependencies

• boto3
• boto3-stubs[secretsmanager]
• boto3-stubs[ssm]

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Installation

$ pip install secretbox

Optional AWS support

$ pip install secretbox[aws]

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Documentation:

Example use with auto_load=True

This loads the system environ and the .env from the current working directory into the class state for quick reference. Loaded secrets can be accessed from the .values property or from other methods such as os.getenviron().

from secretbox import SecretBox

secrets = SecretBox(auto_load=True)


def main() -> int:
    """Main function"""
    my_sevice_password = secrets.values.get("SERVICE_PW")
    # More code
    return 0


if __name__ == "__main__":
    raise SystemExit(main())

Example use with use_loaders()

Loaders collect key:value pair secrets from various sources. When you need more than one source loaded, in a particular order, with a single collection of all loaded values then .use_loaders() is the solution. Each loader is executed in turn and the results compiled with the SecretBox object.

This loads the system environment variables, an AWS secret store, and then a specific .env file if it exists. Secrets are loaded in the order of loaders, replacing any matching keys from the prior loader.

from secretbox import AWSSecretLoader
from secretbox import EnvFileLoader
from secretbox import EnvironLoader
from secretbox import SecretBox

secrets = SecretBox()


def main() -> int:
    """Main function"""
    secrets.use_loaders(
        EnvironLoader(),
        AWSSecretLoader("mySecrets", "us-east-1"),
        EnvFileLoader("sandbox/.override_env"),
    )

    my_sevice_password = secrets.values.get("SERVICE_PW")
    # More code
    return 0


if __name__ == "__main__":
    raise SystemExit(main())

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Example use with stand-alone loader

Loaders can be used as needed. For this example we only need to load an AWS Parameter store.

from secretbox import AWSParameterStoreLoader

secrets = AWSParameterStoreLoader("mystore/params/", "us-west-2")
secrets.run()


def main() -> int:
    """Main function"""
    my_sevice_password = secrets.values.get("SERVICE_PW")
    # More code
    return 0


if __name__ == "__main__":
    raise SystemExit(main())

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SecretBox arguments:

SecretBox(*, auto_load: bool = False, load_debug: bool = False)

auto_load

• Loads environment variables and then the .env file from current working directory if found.

load_debug

• When true, internal logger level is set to DEBUG. Secret values are truncated, however it is not recommended to leave this on for production deployments.

SecretBox API:

.values

• Property: A copy of the dict[str, str] key:value pairs loaded

.use_loaders(*loaders: Loader) -> None

• Loaded results are injected into environ and stored in state.

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NOTE: All .get methods pull from the instance state of the class and do not reflect changes to the enviornment post-load.

.get(key: str, default: str | None = None) -> str

• Returns the string value of the loaded value by key name. If the key does not exists then KeyError will be raised unless a default is given, then that is returned.

.set(key: str, value: str) -> None

• Adds the key:value pair to both the secretbox instance and the environment variables

.get_int(key: str, default: int | None = None) -> int -- deprecated

• Returns the int value of the loaded value by key name. Raise ValueError if the found key cannot convert to int. Raise KeyError if the key is not found and no default is given.

.get_list(key: str, delimiter: str = ",", default: list[str] | None = None) -> List[str]: -- deprecated

• Returns a list of the loaded value by key name, seperated at defined delimiter. No check is made if delimiter exists in value. default is returned if key is not found otherwise a KeyError is raised.

.load_from(loaders: list[str], **kwargs: Any) -> None -- deprecated

• Runs load_values from each of the listed loadered in the order they appear
• Loader options:
  • environ
    • Loads the current environmental variables into secretbox.
  • envfile
    • Loads .env file. Optional filename kwarg can override the default load of the current working directory .env file.
  • awssecret
    • Loads secrets from an AWS secret manager. Requires aws_sstore_name and aws_region_name keywords to be provided or for those values to be in the environment variables under AWS_SSTORE_NAME and AWS_REGION_NAME. aws_sstore_name is the name of the store, not the arn.
  • awsparameterstore
    • Loads secrets from an AWS Parameter Store (SSM/ASM). Requires aws_sstore_name and aws_region_name keywords to be provided or for those values to be in the environment variables under AWS_SSTORE_NAME and AWS_REGION_NAME. aws_sstore_name is the name or prefix of the parameters to retrieve.
• kwargs
  • All keyword arguments are passed into the loaders when they are called. Each loader details which extra keyword arguments it uses or requires above.

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Loaders

All loaders follow the same abstract base class. Calling .run() will load secrets from the loader's source. Each loader will have optional parameters definable on instantiation.

EnvironLoader

Load system environ values

EnvFileLoader

Load local .env file.

• Args:
  • filename: [str] Optional filename (with path) to load, default is .env

AWSSecretLoader

Load secrets from an AWS secret manager.

• Args:
  • aws_sstore: [str] Name of the secret store (not the arn)
    • Can be provided through environ AWS_SSTORE_NAME
  • aws_region: [str] Regional location of secret store
    • Can be provided through environ AWS_REGION_NAME or AWS_REGION

AWSParameterStoreLoader

Load secrets from AWS parameter store.

• Args:
  • aws_sstore: [str] Name of parameter or path of parameters if endings with /
    • Can be provided through environ AWS_SSTORE_NAME
  • aws_region: [str] Regional Location of parameter(s)
    • Can be provided through environ AWS_REGION_NAME or AWS_REGION

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A note about logging output

This library restricts any DEBUG logging output during the use of a boto3 client or the methods of that client. This is to prevent the logging of your secrets as well as the bearer tokens used within AWS. You can disable this at the aws loader by adjusting hide_boto_debug to be False. You will need to define your own instance of the AWSParameterStore or AWSSecretLoader and adjust their flag before calling load_values().

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.env file format

Current format for the .env file supports strings only and is parsed in the following order:

• Each seperate line is considered a new possible key/value set
• Each set is delimted by the first = found
• Leading export keyword is removed from key, case agnostic
• Leading and trailing whitespace are removed
• Matched leading/trailing single quotes or double quotes will be stripped from values (not keys).

I'm open to suggestions on standards to follow here. This is compiled from "crowd standard" and what is useful at the time.

This .env example:

# Comments are ignored

KEY=value

Invalid lines without the equal sign delimiter will also be ignored

Will be parsed as:

{"KEY": "value"}

This .env example:

export PASSWORD = correct horse battery staple
USER_NAME="not_admin"

MESSAGE = '    Totally not an "admin" account logging in'

Will be parsed as:

{
    "PASSWORD": "correct horse battery staple",
    "USER_NAME": "not_admin",
    "MESSAGE": '    Totally not an "admin" account logging in',
}

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Local developer installation

It is strongly recommended to use a virtual environment (venv) when working with python projects. Leveraging a venv will ensure the installed dependency files will not impact other python projects or any system dependencies.

The following steps outline how to install this repo for local development. See the CONTRIBUTING.md file in the repo root for information on contributing to the repo.

Windows users: Depending on your python install you will use py in place of python to create the venv.

Linux/Mac users: Replace python, if needed, with the appropriate call to the desired version while creating the venv. (e.g. python3 or python3.8)

All users: Once inside an active venv all systems should allow the use of python for command line instructions. This will ensure you are using the venv's python and not the system level python.

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Installation steps

Clone this repo and enter root directory of repo:

git clone https://github.com/Preocts/secretbox
cd secretbox

Create the venv:

python -m venv venv

Activate the venv:

# Linux/Mac
. venv/bin/activate

# Windows
venv\Scripts\activate

The command prompt should now have a (venv) prefix on it. python will now call the version of the interpreter used to create the venv

Install editable library and development requirements:

# Update pip and tools
python -m pip install --upgrade pip wheel setuptools

# Install development requirements
python -m pip install -r requirements-dev.txt

# Install requirements (if any defined)
python -m pip install -r requirements.txt

Install pre-commit (see below for details):

pre-commit install

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Misc Steps

Run pre-commit on all files:

pre-commit run --all-files

Run tests:

tox [-r] [-e py3x]

To deactivate (exit) the venv:

deactivate

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pre-commit

A framework for managing and maintaining multi-language pre-commit hooks.

This repo is setup with a .pre-commit-config.yaml with the expectation that any code submitted for review already passes all selected pre-commit checks. pre-commit is installed with the development requirements and runs seemlessly with git hooks.

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Makefile

This repo has a Makefile with some quality of life scripts if the system supports make. Please note there are no checks for an active venv in the Makefile.

PHONY	Description
init	Update pip, setuptools, and wheel to newest version
install	install project
install-dev	install development requirements and project
build-dist	Build source distribution and wheel distribution
clean-artifacts	Deletes python/mypy artifacts including eggs, cache, and pyc files
clean-tests	Deletes tox, coverage, and pytest artifacts
clean-build	Deletes build artifacts
clean-all	Runs all clean scripts