[英]UnsupportedAlgorithm: This backend does not support this key serialization. - Python cryptography load_pem_private_key
我正在嘗試根據此處的示例為AWS Cloudfront生成簽名的URL。 在線上
private_key = serialization.load_pem_private_key(
key_file.read(),
password=None,
backend=default_backend()
)
我得到錯誤UnsupportedAlgorithm: This backend does not support this key serialization.
完整的跟蹤如下:
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.
在閱讀文檔時,它說由於以下原因而發生異常:
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.
給出的PEM文件以-----BEGIN RSA PRIVATE KEY-----
開頭,以-----END RSA PRIVATE KEY-----
。
我在開發此應用程序時使用谷歌appengine sdk。
我需要幫助理解此錯誤消息以及如何使其工作。
不幸的是,python加密庫不能與google appengine(GAE)一起使用,因為這個庫需要有C擴展,你不能在GAE中安裝C擴展。 您只能使用純python包。
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