crypto.py 文件源码

def get_fingerprint(path, passphrase=None):
    """Generate the fingerprint of the public key. """

    fingerprint = {}

    privatekey = load_privatekey(path, passphrase)
    try:
        publickey = crypto.dump_publickey(crypto.FILETYPE_ASN1, privatekey)
        for algo in hashlib.algorithms:
            f = getattr(hashlib, algo)
            pubkey_digest = f(publickey).hexdigest()
            fingerprint[algo] = ':'.join(pubkey_digest[i:i + 2] for i in range(0, len(pubkey_digest), 2))
    except AttributeError:
        # If PyOpenSSL < 16.0 crypto.dump_publickey() will fail.
        # By doing this we prevent the code from raising an error
        # yet we return no value in the fingerprint hash.
        pass

    return fingerprint