ed25519py.py 文件源码

def crypto_sign_keypair(seed=None):
    """Return (verifying, secret) key from a given seed, or os.urandom(32)"""    
    if seed is None:
        seed = os.urandom(PUBLICKEYBYTES)
    else:
        warnings.warn("ed25519ll should choose random seed.",
                      RuntimeWarning)
    if len(seed) != 32:
        raise ValueError("seed must be 32 random bytes or None.")
    skbytes = seed
    vkbytes = djbec.publickey(skbytes)
    return Keypair(vkbytes, skbytes+vkbytes)