Whispr

Whispr (Pronounced as whisper) is a CLI tool to safely inject secrets from your favorite secret vault (Ex: AWS Secrets Manager, Azure Key Vault etc.) into your app's environment. This is very useful for enabling secure local software development.

Whispr uses keys (with empty values) specified in a .env file and fetches respective secrets from a vault, and sets them as environment variables before launching an application.

Install whispr easily with pip!

pip install whispr

Key Features of Whispr:

• Safe Secret Injection: Fetch and inject secrets from your desired vault using HTTPS, SSL encryption, strict CERT validation.
• Just In Time (JIT) Privilege: Set environment variables for developers only when they're needed.
• Secure Development: Eliminate plain-text secret storage and ensure a secure development process.
• Customizable Configurations: Configure project-level settings to manage multiple secrets for multiple projects.
• No Custom Scripts Required: Whispr eliminates the need for custom bash scripts or cloud CLI tools to manage secrets, making it easy to get started.
• Easy Installation: Cross-platform installation with PyPi.

Supported Vault Technologies:

Why use Whispr ?

The MITRE ATT&CK Framework Tactic 8 (Credential Access) suggests that adversaries can exploit plain-text secrets and sensitive information stored in files like .env. It is essential to avoid storing sensitive information in unencrypted files. To help developers, Whispr can safely fetch and inject secrets from a vault into the app environment or pass them as standard input just in time. This enables developers to securely manage credentials and mitigate advisory exploitation tactics.

Getting Started

Installing Whispr

To get started with Whispr, simply run:

pip install whispr

Configuring Your Project

Step 1: Initialize Whispr

Run whispr init <vault_type> in your terminal to create a whispr.yaml file in your project root. This file will store your configuration settings.

The available vault types are: aws, azure, and gcp.

Example whispr.yaml contents (For: AWS):

env_file: '.env'
secret_name: <your_secret>
vault: aws

This default configuration will inject fetched secrets into os.environ of main process. If your app instead want to receive secrets as STDIN arguments, use no_env: true field. This is a secure way than default control but app now should parse arguments itself.

env_file: '.env'
secret_name: <your_secret>
vault: aws
no_env: true # Setting true will send KEY1=VAL1 secret pairs as command args

Setting Up Your Injectable Secrets

Step 2: Create or Configure a Secret File

Create a new .env file with empty values for your secret keys. For example:

POSTGRES_USERNAME=
POSTGRES_PASSWORD=

Note: You can also control filename with env_file key in your whispr.yaml.

Step 3: Authenticating to Your Vault (Ex:AWS)

• Authenticate to AWS using Short-term credentials.
• Alternatively, set temporary AWS credentials using a config file or environment variables.

Note: Use respective authentication methods for other vaults.

Programmatic access of Whispr (Doesn't require a configuration file)

In addition to installing Whispr as a tool, one can make use of core utility functions like this:

pip install whispr

Then from Python code you can import important functions like this:

from whispr.utils.vault import fetch_secrets
from whispr.utils.process import execute_command

config = {
  "vault": "aws",
  "secret_name": "<your_secret_name>",
  "region": "us-west-2"
}

secrets = fetch_secrets(config)

# Now, inject secrets into your command's environment
command = "ls -l"
cp = execute_command(command.split(), no_env=False, secrets=secrets) #cp is CompletedProcess object.

That's it. This is a programmatic equivalent to the tool usage.

Launch any Application using Whispr (Requires a configuration file: whispr.yaml)

In contrary to programmatic access, if you want to run a script/program do: whispr run '<your_app_command_with_args>' (mind the single quotes around command) to inject your secrets before starting the subprocess.

Examples:

whispr run 'python main.py' # Inject secrets and run a Python program
whispr run 'node server.js --threads 4' # Inject secrets and run a Node.js express server
whispr run 'django manage.py runserver' # Inject secrets and start a Django server
whispr run '/bin/sh ./script.sh' # Inject secrets and run a custom bash script. Script should be permitted to execute
whispr run 'semgrep scan --pro' # Inject Semgrep App Token and scan current directory with Semgrep SAST tool.

TODO

Support:

• HashiCorp Vault
• 1Password Vault
• K8s secret patching
• Container patching (docker)