usso-jwt 0.2.2

A simple and lightweight Python package for handling JWT (JSON Web Token) operations with USSO (Unified Single Sign-On).

USSO-JWT

A secure and flexible JWT (JSON Web Token) implementation for Python, designed to work seamlessly with the USSO authentication system. This library provides a robust set of tools for creating, signing, verifying, and managing JWTs with support for multiple cryptographic algorithms.

Features

• Multiple Algorithm Support:

  • HMAC (HS256, HS384, HS512)
  • RSA (RS256, RS384, RS512, PS256, PS384, PS512)
  • ECDSA (ES256, ES384, ES512)
  • EdDSA (Ed25519)

• JWK Support: Full support for JSON Web Keys (JWK) format

• PEM Support: Load keys from PEM-encoded files

• Type Safety: Built with type hints for better IDE support and code safety

• Comprehensive Testing: Thorough test coverage for all algorithms and features

Installation

Install using pip:

pip install usso-jwt

Quick Start

Creating and Signing a JWT

from usso_jwt import JWT

# Create a JWT with a payload
jwt = JWT(
    payload={
        "sub": "1234567890",
        "name": "John Doe",
        "iat": 1516239022
    }
)

# Sign with HMAC
token = jwt.sign(hmac_key, "HS256")

# Sign with RSA
token = jwt.sign(rsa_private_key, "RS256")

# Sign with ECDSA
token = jwt.sign(ecdsa_private_key, "ES256")

# Sign with EdDSA
token = jwt.sign(eddsa_private_key, "Ed25519")

Verifying a JWT

from usso_jwt import JWT

# Verify with HMAC
jwt = JWT.verify(token, hmac_key, "HS256")

# Verify with RSA
jwt = JWT.verify(token, rsa_public_key, "RS256")

# Verify with ECDSA
jwt = JWT.verify(token, ecdsa_public_key, "ES256")

# Verify with EdDSA
jwt = JWT.verify(token, eddsa_public_key, "Ed25519")

Working with JWKs

from usso_jwt import JWT

# Create a JWT with a JWK
jwt = JWT(payload={"sub": "1234567890"})

# Sign with a JWK
token = jwt.sign(jwk, "RS256")

# Verify with a JWK
jwt = JWT.verify(token, jwk, "RS256")

Supported Algorithms

HMAC (Symmetric)

• HS256: HMAC with SHA-256
• HS384: HMAC with SHA-384
• HS512: HMAC with SHA-512

RSA (Asymmetric)

• RS256: RSA with SHA-256
• RS384: RSA with SHA-384
• RS512: RSA with SHA-512
• PS256: RSA-PSS with SHA-256
• PS384: RSA-PSS with SHA-384
• PS512: RSA-PSS with SHA-512

ECDSA (Asymmetric)

• ES256: ECDSA with P-256 and SHA-256
• ES384: ECDSA with P-384 and SHA-384
• ES512: ECDSA with P-521 and SHA-512

EdDSA (Asymmetric)

• EdDSA: Ed25519

Security Considerations

• Always use strong keys appropriate for your chosen algorithm
• For HMAC, use keys at least as long as the hash output (e.g., 32 bytes for HS256)
• For RSA, use keys of at least 2048 bits
• For ECDSA, use the recommended curves (P-256, P-384, P-521)
• Store private keys securely and never expose them
• Use appropriate key rotation policies

Contributing

Contributions are welcome! Please feel free to submit a Pull Request. For major changes, please open an issue first to discuss what you would like to change.

License

This project is licensed under the MIT License - see the LICENSE file for details.