Cryptography: Could not deserialize key data

[shaaaarpy]

serialization.load_pem_private_key function always throws the value error could not deserialize data with python 3.6. It works well with python 2.7

[alex]

Can you give us more details? What version of cryptography? How can we reproduce this? Can you give us a full stack trace?

[shaaaarpy]

Hi alex
I am using cryptography==2.7 with python 3.6.8
My code is

with open(creds.SIGNING_PEM_FILE_PATH, 'rb') as key_file:
private_key = serialization.load_pem_private_key(
(key_file.read()),
password=None,
backend=default_backend())

The error i am getting is :
File "/opt/python/cryptography/hazmat/backends/openssl/backend.py", line 1335, in _handle_key_loading_error
raise ValueError("Could not deserialize key data.")

I have tried multiple online solutions but none is working.
Thank you

[shaaaarpy]

For the complete traceback please have a look
Thank you

[Hondsome]

I also came this problem. maybe problom is that here ?

def _handle_key_loading_error(self):
    errors = self._consume_errors()

    if not errors:
        raise ValueError("Could not deserialize key data.")

[shaaaarpy]

Hi Hondsome,
So did you solve this problem?

Thank you

[Hondsome]

Hi Hondsome,
So did you solve this problem?

Thank you

No, I am trying

[Hondsome]

Hi Hondsome,
So did you solve this problem?

Thank you

i solve that , uninstall cryptography 2.6 and install cryptography==2.2 . it worked

[shaaaarpy]

Thanks a lot Hondsome. Just to confirm python version is 3 right?

[Hondsome]

hhh,no . i use 2.7 . maybe is cryptography version problem , just try it. i solve my problem

[cpj2195]

@alex the Problem is coming up on AWS lambda but is working fine with python3.6 on local ubuntu system. Can you help us a bit here, we are stuck on this problem for quite a few days now.
P.S I'm @shaaaarpy 's colleague.

[strickon]

@alex the Problem is coming up on AWS lambda but is working fine with python3.6 on local ubuntu system. Can you help us a bit here, we are stuck on this problem for quite a few days now.
P.S I'm @shaaaarpy 's colleague.

Did you ever resolve it? I am facing the same issue. What was the solution?

[alex]

Without clear instructions to reproduce this issue, there's not much we can do.

[reaperhulk]

Different versions of OpenSSL can be picky about key formats. If you're seeing it work in one env but not another take a hard look at the key and make sure it's a valid PEM: https://cryptography.io/en/latest/faq/#why-can-t-i-import-my-pem-file

I'm going to close this since it's too generic but if you have a reproducer or can provide a sample key (that isn't used in your system!!!) that demonstrates the problem we can take a look. Please open a new issue for it :)

[Valerialukaj]

I have the same problem, but I can't even solve it with the change of the library version. Anyone have any ideas?