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manifest: explicitly error if whitespace reconstruction has failed 

This behavior should not break any more use cases than before.
Previously, if the mismatch occured, we would actually push a manifest
that we then never referred to in the manifest list! If this was done in
a new repository, the command would fail with an obscure error from the
registry - the content wouldn't exist with the descriptor we expect it
to.

Signed-off-by: Justin Chadwell <me@jedevc.com>
This commit is contained in:
Justin Chadwell 2023-01-27 10:31:07 +00:00
parent 070825bc74
commit 285e137aa4
1 changed files with 19 additions and 6 deletions
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25
cli/command/manifest/push.go
View File

@ -218,28 +218,41 @@ func buildPutManifestRequest(imageManifest types.ImageManifest, targetRef refere
return mountRequest{}, err
}
// Attempt to reconstruct indentation of the manifest to ensure sha parity
// with the registry.
//
// This is necessary because our previous internal storage format did not
// preserve whitespace. If we don't have the newer format present, we can
// attempt the reconstruction like before, but explicitly error if the
// reconstruction failed!
switch {
case imageManifest.SchemaV2Manifest != nil:
// This indentation has to be added to ensure sha parity with the registry
dt, err := json.MarshalIndent(imageManifest.SchemaV2Manifest, "", " ")
if err != nil {
return mountRequest{}, err
}
// indent only the DeserializedManifest portion of this, in order to maintain parity with the registry
// and not alter the sha
dig := imageManifest.Descriptor.Digest
if dig2 := dig.Algorithm().FromBytes(dt); dig != dig2 {
return mountRequest{}, errors.Errorf("internal digest mismatch for %s: expected %s, got %s", imageManifest.Ref, dig, dig2)
}
var manifest schema2.DeserializedManifest
if err = manifest.UnmarshalJSON(dt); err != nil {
return mountRequest{}, err
}
imageManifest.SchemaV2Manifest = &manifest
case imageManifest.OCIManifest != nil:
// This indentation has to be added to ensure sha parity with the registry
dt, err := json.MarshalIndent(imageManifest.OCIManifest, "", " ")
if err != nil {
return mountRequest{}, err
}
// indent only the DeserializedManifest portion of this, in order to maintain parity with the registry
// and not alter the sha
dig := imageManifest.Descriptor.Digest
if dig2 := dig.Algorithm().FromBytes(dt); dig != dig2 {
return mountRequest{}, errors.Errorf("internal digest mismatch for %s: expected %s, got %s", imageManifest.Ref, dig, dig2)
}
var manifest ocischema.DeserializedManifest
if err = manifest.UnmarshalJSON(dt); err != nil {
return mountRequest{}, err