swarmauri_mre_crypto_age 0.3.0.dev43

Age-style X25519 sealed-per-recipient MRE provider for Swarmauri

---

Swarmauri MRE Crypto Age

Age-based multi-recipient encryption provider implementing the IMreCrypto contract.

• Sealed-per-recipient X25519 stanzas (mode="sealed_per_recipient" and recipient_alg="X25519-SEAL")
• ChaCha20-Poly1305 payload encryption for each recipient header
• Deterministic recipient identifiers via SHA-256 public key fingerprints
• Rewrapping support for adding or removing recipients when provided the original plaintext or an opening identity

Installation

Choose the installer that matches your project workflow:

# pip
pip install swarmauri_mre_crypto_age

# Poetry
poetry add swarmauri_mre_crypto_age

# uv
uv add swarmauri_mre_crypto_age

Usage

The provider exposes asynchronous helpers for encrypting data to many recipients and decrypting it for a specific private key. The example below walks through a complete round trip.

1. Create the crypto provider.
2. Generate key pairs for two recipients.
3. Encrypt a payload for both recipients.
4. Decrypt the payload for one recipient.

from swarmauri_mre_crypto_age import AgeMreCrypto
from cryptography.hazmat.primitives.asymmetric.x25519 import X25519PrivateKey

crypto = AgeMreCrypto()

# generate key pairs for each participant
sk1 = X25519PrivateKey.generate()
pk1 = sk1.public_key()
sk2 = X25519PrivateKey.generate()
pk2 = sk2.public_key()

recipients = [
    {"kind": "cryptography_obj", "obj": pk1},
    {"kind": "cryptography_obj", "obj": pk2},
]

env = await crypto.encrypt_for_many(recipients, b"secret")
pt = await crypto.open_for({"kind": "cryptography_obj", "obj": sk1}, env)
assert pt == b"secret"

The helper accepts multiple KeyRef formats, including dictionaries with kind="cryptography_obj" (for X25519PublicKey / X25519PrivateKey objects) and raw byte references such as kind="raw_x25519_pk" or kind="age_x25519_pk". When rewrapping an existing envelope to add recipients, pass the plaintext via opts["pt"] or provide an identity through opts["open_with"] so the payload can be resealed for the new recipients.

Entry point

The provider is registered under the swarmauri.mre_cryptos entry-point as AgeMreCrypto.

Want to help?

If you want to contribute to swarmauri-sdk, read up on our guidelines for contributing that will help you get started.