How can I use RSA_private_encrypt in cryptography when I migrate from M2Crypt?

[hirorogithub]

python 3.11/2.7
cryptography: just pip install latest version

I have some code implement by M2Crypto`s RSA, which has used rsa private key to encrypt data.

I know that in general, the signature function should be used directly, but I can only migrate the logic in the original way.
I tried to use sign+prehashed to bypass the hash algorithm that sign must provide, attempting to implement private encryption, but this does not seem to work.
I checked the source code of M2Crpto. RSA_private_encrypt is provided by openssl. It seems that cryptography does not support this function now? How can I implement it?

[alex]

To migrate your code, you'll need to establish which padding mode you're using, and then convert that to the equivalent pyca/cryptography API: https://cryptography.io/en/latest/hazmat/primitives/asymmetric/rsa/#signing

[github-actions]

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