mirror of
https://github.com/edgelesssys/constellation.git
synced 2024-12-23 22:49:43 -05:00
57b8efd1ec
Fetched measurements are now verified using Rekor in addition to a signature check. Signed-off-by: Fabian Kammel <fk@edgeless.systems>
43 lines
1.0 KiB
Go
43 lines
1.0 KiB
Go
/*
|
|
Copyright (c) Edgeless Systems GmbH
|
|
|
|
SPDX-License-Identifier: AGPL-3.0-only
|
|
*/
|
|
|
|
package cmd
|
|
|
|
import (
|
|
"context"
|
|
"encoding/base64"
|
|
"fmt"
|
|
|
|
"github.com/edgelesssys/constellation/v2/internal/constants"
|
|
)
|
|
|
|
type rekorVerifier interface {
|
|
SearchByHash(context.Context, string) ([]string, error)
|
|
VerifyEntry(context.Context, string, string) error
|
|
}
|
|
|
|
func verifyWithRekor(ctx context.Context, verifier rekorVerifier, hash string) error {
|
|
uuids, err := verifier.SearchByHash(ctx, hash)
|
|
if err != nil {
|
|
return fmt.Errorf("searching Rekor for hash: %w", err)
|
|
}
|
|
|
|
if len(uuids) == 0 {
|
|
return fmt.Errorf("no matching entries in Rekor")
|
|
}
|
|
|
|
// We expect the first entry in Rekor to be our original entry.
|
|
// SHA256 should ensure there is no entry with the same hash.
|
|
// Any subsequent hashes are treated as potential attacks and are ignored.
|
|
// Attacks on Rekor will be monitored from other backend services.
|
|
artifactUUID := uuids[0]
|
|
|
|
return verifier.VerifyEntry(
|
|
ctx, artifactUUID,
|
|
base64.StdEncoding.EncodeToString([]byte(constants.CosignPublicKey)),
|
|
)
|
|
}
|