feat(cli): add --payload-media-type to sign (fixes #4300)
#4304
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This commit introduces a new `--payload-media-type` flag to the `cosign sign` command. When signing with a custom payload using the `--payload` flag, users can now also specify the MIME type of that payload via `--payload-media-type`. This media type is then stored in the `mediaType` field of the signature layer descriptor in the resulting OCI manifest. This allows consumers of the signature to correctly interpret the payload's content type. If `--payload` is not used, this flag is ignored. Signed-off-by: Alberto Gonzalez <albgonz@google.com>
arubegonsan
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cmurphy
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Oct 10, 2025
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| var s icos.Signer | ||
| s = ipayload.NewSigner(sv) | ||
| var staticOpts []static.StaticOption |
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It looks like the majority of the changed lines in this PR come from renaming this type. It's creating a lot of noise, and you'll find that it trips up the linter because it creates a "stutter". I don't think it's necessary to rename it because it's clear what it's for based on the package name. Could you undo this rename?
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Summary
This commit introduces a new
--payload-media-typeflag to thecosign signcommand.When signing with a custom payload using the
--payloadflag, users can now also specify the MIME type of that payload via--payload-media-type.This media type is then stored in the
mediaTypefield of the signature layer descriptor in the resulting OCI manifest. This allows consumers of the signature to correctly interpret the payload's content type.If
--payloadis not used, this flag is ignored.Release Note
cosign sign --payloadhardcodes layer MIME toapplication/vnd.dev.cosign.simplesigning.v1+json#4300: introduced the--payload-media-typeflag incosign sign.Documentation
Needs documentation change.