List recipients for an encrypted file

[vsajip]

Original report by Jan Christian Grünhage (Bitbucket: jcgruenhage, GitHub: jcgruenhage).

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Motivation

We’re using this library at Famedly for pass compatible secret encryption in ansible. For making it ergonomic, so that changes in the recipient list are automatically applied to all passwords, we need to get the list of current recipients for the file and compare it to the desired list. python-gnupg does currently not provide a way to get the recipient list for a file right now.

Implementation hints

I’ve looked into how this could be done, and it seems that --list-only is the option that prints the recipient keys to stderr without actually running the decryption. Together with -v, you get a nice, easily parse-able list in the beginning of the output.

pass also has an implementation for this, in just one relatively hard to read 216 character line: https://git.zx2c4.com/password-store/tree/src/password-store.sh#n132, which is probably going to look a lot nicer in python ^^

[vsajip]

Fix #158: Add functionality to get the recipients of an encrypted message.

[vsajip]

Original changes by Vinay Sajip (Bitbucket: vinay.sajip, GitHub: vsajip).

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changed state from "new" to "resolved"

[vsajip]

Original comment by Jan Christian Grünhage (Bitbucket: jcgruenhage, GitHub: jcgruenhage).

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Thanks for the fix, that was quick! Any chance that we’ll see it in a released version soon? Working with deps from branches is a bit of a pain :D

[vsajip]

Hopefully soon - can you confirm that this change meets your requirement?

[vsajip]

Original comment by Jadyn Emma Jäger (Bitbucket: j.jaeger@famedly.com, ).

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Yes, I can confirm that it works as intended. Thanks a lot.

[vsajip]

Version 0.4.8, released on PyPI today, should have this change.

[vsajip]

Issue #160 was marked as a duplicate of this issue.