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Init entity from ociremote when signing a digest ref #1616

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merged 1 commit into from Mar 16, 2022

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@puerco puerco commented Mar 16, 2022

Summary

This PR modifies the object used to seed the SignedEntity used when signing a digest reference to fix a bug where cosign would wipe out all signatures from the manifest (and thus, not garbage-collecting previous signature layers) when signing a digest reference.

Before, the entity was created from a ociempty.SignedImage. This caused cosign to create a new manifest on every invocation of cosign sign image@sha.... , effectively wiping any previous signatures attached to the image.

Now, cosign el init the entity from a ociremote.SignedEntity which will append new signatures to any existing ones.

Signed-off-by: Adolfo García Veytia (Puerco) puerco@chainguard.dev

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Release Note

Fixed a bug where cosign would always create a new sig manifest when signing a digest reference, preventing it from attaching more than one signature.

This commit modifies the object used to seed the SignedEntity used
when signing a digest reference to fix a bug where cosign would wipe
out all signatures from the manifest (and not garbage-collecting
previous signature layers)

Before the entity was created from a `ociempty.SignedImage`. This
cuased cosign to always wipe any previous signatures attached to the
image.

Now, cosign el init the entity from a `ociremote.SignedEntity` which
will append new signatures to any existing ones.

Signed-off-by: Adolfo García Veytia (Puerco) <puerco@chainguard.dev>
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codecov-commenter commented Mar 16, 2022

Codecov Report

Merging #1616 (2c2e074) into main (a60fd71) will decrease coverage by 0.06%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main    #1616      +/-   ##
==========================================
- Coverage   28.01%   27.95%   -0.07%     
==========================================
  Files         137      137              
  Lines        7802     7826      +24     
==========================================
+ Hits         2186     2188       +2     
- Misses       5386     5407      +21     
- Partials      230      231       +1     
Impacted Files Coverage Δ
cmd/cosign/cli/sign/sign.go 1.62% <0.00%> (ø)
pkg/cosign/tlog.go 4.70% <0.00%> (+0.41%) ⬆️

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@dlorenc dlorenc merged commit 36d7646 into sigstore:main Mar 16, 2022
@github-actions github-actions bot added this to the v1.7.0 milestone Mar 16, 2022
coyote240 pushed a commit to coyote240/cosign that referenced this pull request Mar 16, 2022
This commit modifies the object used to seed the SignedEntity used
when signing a digest reference to fix a bug where cosign would wipe
out all signatures from the manifest (and not garbage-collecting
previous signature layers)

Before the entity was created from a `ociempty.SignedImage`. This
cuased cosign to always wipe any previous signatures attached to the
image.

Now, cosign el init the entity from a `ociremote.SignedEntity` which
will append new signatures to any existing ones.

Signed-off-by: Adolfo García Veytia (Puerco) <puerco@chainguard.dev>
mlieberman85 pushed a commit to mlieberman85/cosign that referenced this pull request May 6, 2022
This commit modifies the object used to seed the SignedEntity used
when signing a digest reference to fix a bug where cosign would wipe
out all signatures from the manifest (and not garbage-collecting
previous signature layers)

Before the entity was created from a `ociempty.SignedImage`. This
cuased cosign to always wipe any previous signatures attached to the
image.

Now, cosign el init the entity from a `ociremote.SignedEntity` which
will append new signatures to any existing ones.

Signed-off-by: Adolfo García Veytia (Puerco) <puerco@chainguard.dev>
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3 participants