Signing releases

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Troy Farrell

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Aug 19, 2021, 1:05:53 AMAug 19
to Cap'n Proto

Hello everyone,

I am using Cap'n Proto in a Sandstorm project.  As part of the build process, a script downloads and builds the Cap'n Proto source from capnproto.org.  I would like to have a way to verify that the file I've downloaded matches what was released.  Would the release manager (Kenton?) please consider posting signatures or hashes for the releases?

Thanks for Cap'n Proto (and Sandstorm)!
Troy

Kenton Varda

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Aug 19, 2021, 10:28:32 AMAug 19
to Troy Farrell, Cap'n Proto
Hi Troy,

Assuming you're downloading a specific release, I'd recommend checking the hash against a known-good hash, with a command like:

echo 'b28054a7a2bfea42bfc392c8d009630d94d72e8ce86a23ad6f18b5e72574064f  capnproto-c++-0.9.0.tar.gz' | sha256sum -c

Whenever you update to a newer version, you'd update the hash.

I'm not against also signing releases with an asymmetric key, but I don't think I'll have time to set up the infrastructure for that any time soon, sorry.

-Kenton

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Troy Farrell

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Aug 20, 2021, 11:59:46 AMAug 20
to Cap'n Proto
Kenton wrote:
Hi Troy,

Assuming you're downloading a specific release, I'd recommend checking the hash against a known-good hash, with a command like:

echo 'b28054a7a2bfea42bfc392c8d009630d94d72e8ce86a23ad6f18b5e72574064f  capnproto-c++-0.9.0.tar.gz' | sha256sum -c

This is what I'm currently doing for Rust, via Rustup-init.  If you don't mind, I'll just ask the list for the SHA256 of future releases if it's not included in the release announcement.
 
Whenever you update to a newer version, you'd update the hash.

I'm not against also signing releases with an asymmetric key, but I don't think I'll have time to set up the infrastructure for that any time soon, sorry.

 I totally understand.  I haven't signed a release in ages.

Thanks!
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