def derive_key()

in fxa/crypto.py [0:0]

• 9 lines of code
• 1 McCabe index (conditional complexity)

def derive_key(secret, namespace, size=32):
    """HKDF-derive key material from the given master secret.

    This applies standard HKDF with our application-specific defaults, to
    produce derived key material of the requested length.
    """
    kdf = HKDF(
        algorithm=hashes.SHA256(),
        length=size,
        salt=b"",
        info=hkdf_namespace(namespace),
        backend=backend
    )
    return kdf.derive(secret)