crypto.py 文件源码

def load_private_key(privkey_file):
    ''' 
    Loads the private key stored in the file indicated by the privkey_file
    parameter and returns it

    The `privkey_file` parameter indicates the absolute path to the file
    storing the private key.

    The key returned is a RSAPrivateKey instance.
    '''
    with open(privkey_file, "rb") as key_file:
        privkey = serialization.load_pem_private_key(
            key_file.read(),
            password=None,
            backend=default_backend()
        )
    return privkey