A very poor tool to generate S/MIME signatures for arbitrary content & probably insecurely too.
A quick example:
>>> smime_sign(
... signer_cert_path="/path/to/files/signer.cert",
... signer_key_path="/path/to/files/signer.pem",
... recipient_cert_path="/path/to/files/recipient.cert",
... content="test",
... output_format="PEM",
... )- Does S/MIME signatures.
- Verifies S/MIME signatures.
This utility library has single purpose - provide support for making S/MIME signatures on Python2 and 3, which currently lacks any proper libraries for that purpose.
The main use case it is built for: at work our system has to generate Apple Passbook Pass files, which include an S/MIME signature. Currently it is done using M2Crypto.SMIME. While that works - we want to migrate to Python3, and unfortunately for us M2Crypto is not fully supported. smime_sign is a poor man's solution for this problem.
Internally this does nothing more than call openssl smime, so you might want to see its docs too.
- This may be insecure.
- This may be slow if you are signing large blobs of text.
smime_sign(signer_cert_path, signer_key_path, cert_path, recipient_cert_path, content, output_format)
Generates and returns signature string for content in output_format.
All *_path arguments must be absolute paths.
content must be a string, not a path.
Example to generate signature for Passbook manifest:
>>> manifest_json = "..." # JSON string with `manifest.json` content
>>> signature = smime_sign(
... signer_cert_path="/path/to/files/signer.cert",
... signer_key_path="/path/to/files/signer.pem",
... cert_path="/path/to/files/intermediate.cert",
... recipient_cert_path=None,
... content=manifest_json,
... output_format="DER",
... )Verifies a content_path file against a signature at signature_path.
Note: this function was added to help in the tests only.
Tools used in rendering this package: