test signing and publishing of image

Author: mickmis

.github/workflows/image-publish.yml

@@ -28,8 +28,6 @@ jobs:
     steps:
       - name: Install Cosign
         uses: sigstore/cosign-installer@cad07c2e89fa2edd6e2d7bab4c1aa38e53f76003  # v4.1.1
-        with:
-          cosign-release: 'v2.6.1'
       - name: Job information
         run: |
           echo "Job information"

build/build_and_push.sh

@@ -52,8 +52,9 @@ else
     echo "Signing docker image ${TAG} (digest: ${DIGEST})..."
     cosign sign --yes "${DIGEST}"
 
-    echo "Verifying signature of docker image ${TAG} (digest: ${DIGEST})..."
-    cosign verify "${DIGEST}" --certificate-identity="${CERT_IDENTITY}" --certificate-oidc-issuer="${CERT_ISSUER}"
+    echo "Verifying signature of docker image ${TAG} (digest: ${DIGEST}) after a 30 seconds wait..."
+    sleep 30 # the signature may not be returned immediately after being published, so as a mitigation we wait for 30 seconds before verifying
+    cosign verify --certificate-identity="${CERT_IDENTITY}" --certificate-oidc-issuer="${CERT_ISSUER}" "${DIGEST}"
 
     echo "Signed and verified signature of docker image ${TAG} (digest: ${DIGEST})..."