Question

我正在尝试根据示例here生成AWS Cloudfront的签名网址。在线

private_key = serialization.load_pem_private_key(
        key_file.read(),
        password=None,
        backend=default_backend()
    )

我收到错误UnsupportedAlgorithm: This backend does not support this key serialization.完整跟踪如下：

File "command_util.py", line 98, in rsa_signer
    backend=default_backend()  
File "runtime/cryptography/hazmat/primitives/serialization.py", line 20, in load_pem_private_key
    return backend.load_pem_private_key(data, password)
File "runtime/cryptography/hazmat/backends/multibackend.py", line 286, in load_pem_private_key
    _Reasons.UNSUPPORTED_SERIALIZATION
UnsupportedAlgorithm: This backend does not support this key serialization.

在阅读文档时，它说由于以下原因而发生异常：

cryptography.exceptions.UnsupportedAlgorithm – the serialized key is of a type that is not supported by the backend or if 
the key is encrypted with a symmetric cipher that is not supported by the backend.

给出的PEM文件以-----BEGIN RSA PRIVATE KEY-----开头，以-----END RSA PRIVATE KEY-----结尾。

我在开发此应用程序时使用google appengine sdk。

我需要帮助理解此错误消息以及如何使其工作。

Answer 1

不幸的是，python加密库不能与google appengine（GAE）一起使用，因为这个库需要有C扩展，你不能在GAE中安装C扩展。你只能使用纯python包。

UnsupportedAlgorithm：此后端不支持此密钥序列化。 - Python加密技术load_pem_private_key

1 个答案: