support cryptography Python package

[joshgav]

System Package Request

This was originally reported at microsoft/vscode-azureappservice#902

• Why do you need this package? For example, are you using a language-level package which depends on this system package?

Would like to use the Python cryptography package. This requires libffi-dev and openssl-dev. It seems this may need some additional steps to work on Alpine, see these instructions.

• Which Oryx language runtime and version are you using? For example, "Node.js v10.14" or "Python v3.7".

Python v3.7.

• What is the name of the package in the latest stable Debian release?For examples, see https://packages.debian.org/stable/.

libffi-dev
openssl-dev

• Do you need a specific version? If so, which and why?

See here for the versions of OpenSSL supported by the cryptography package.

[kichalla]

@tiloc Would it be possible to get a small repro sample with which I can reproduce the error. (I tried a sample myself with cryptography package but could not repro it...I am not a regular Python developer so could be doing something wrong)

[kichalla]

gentle ping

[kichalla]

Closing this issue as the customer requirement has changed.

@tiloc Please free to re-open this issue with additional information if you come across this issue again. Thanks!