Swarmauri Cipher Suites YubiKey FIPS

YubiKeyFipsCipherSuite captures the subset of YubiKey functionality that is available on FIPS Series tokens. It excludes EdDSA, tightens hash policy, and requires slot attestation, making it a drop-in choice for regulated environments.

Features

• Limits signing algorithms to FIPS-approved RSA-PSS and NIST P-256/P-384 ECDSA.
• Encodes the requirement for attestation before use so orchestrators can gate slots appropriately.
• Supplies parameter defaults for RSA-PSS (salt length, MGF1 hash) and ECDSA hashing to avoid mismatched requests.
• Documents the FIPS policy posture and exposes a provider identifier for the PIV-backed mechanisms (piv:<alg>).

Installation

pip

pip install swarmauri_cipher_suite_yubikey_fips

uv (dependency)

uv add swarmauri_cipher_suite_yubikey_fips

uv (environment)

uv pip install swarmauri_cipher_suite_yubikey_fips

Usage

1. Instantiate the suite with a descriptive name

from swarmauri_cipher_suite_yubikey_fips import YubiKeyFipsCipherSuite

suite = YubiKeyFipsCipherSuite(name="piv-fips")

2. Normalize a FIPS-compliant signing request

from swarmauri_cipher_suite_yubikey_fips import YubiKeyFipsCipherSuite
from swarmauri_core.cipher_suites.types import KeyRef

suite = YubiKeyFipsCipherSuite(name="piv-fips")
key = KeyRef(kid="fips-slot-9a", slot="9a")
descriptor = suite.normalize(op="sign", alg="PS256", key=key)

print(descriptor["mapped"]["provider"])  # -> "piv:PS256:slot=9a"
print(descriptor["params"]["saltLen"])    # -> 32 (hash length default)

All responses include the policy metadata, making it easy to enforce controls (such as requiring attestation) at runtime.

3. Route wrap/unwrap requests

from swarmauri_cipher_suite_yubikey_fips import YubiKeyFipsCipherSuite

suite = YubiKeyFipsCipherSuite(name="piv-fips")
wrap_descriptor = suite.normalize(op="wrap")
unwrap_descriptor = suite.normalize(op="unwrap", alg="RSA-OAEP-256")

for d in (wrap_descriptor, unwrap_descriptor):
    assert d["mapped"]["provider"].startswith("piv:RSA-OAEP-256")

The suite guarantees that both wrap and unwrap operations stay aligned with the RSA-OAEP-256 configuration expected by PIV.

4. Discover compliance metadata

from swarmauri_cipher_suite_yubikey_fips import YubiKeyFipsCipherSuite

suite = YubiKeyFipsCipherSuite(name="piv-fips")
features = suite.features()
print(features["compliance"]["fips"])      # -> True
print(features["constraints"]["hashes"])   # -> ["SHA256", "SHA384"]

Use the feature description to document service capabilities or reject non-compliant requests before they hit hardware.

Entry Point

The suite registers under the swarmauri.cipher_suites entry point as YubiKeyFipsCipherSuite.

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