working commit

vendor/helm.sh/helm/v4/internal/plugin/verify.go

@@ -0,0 +1,39 @@
+/*
+Copyright The Helm Authors.
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package plugin
+
+import (
+	"path/filepath"
+
+	"helm.sh/helm/v4/pkg/provenance"
+)
+
+// VerifyPlugin verifies plugin data against a signature using data in memory.
+func VerifyPlugin(archiveData, provData []byte, filename, keyring string) (*provenance.Verification, error) {
+	// Create signatory from keyring
+	sig, err := provenance.NewFromKeyring(keyring, "")
+	if err != nil {
+		return nil, err
+	}
+
+	// Use the new VerifyData method directly
+	return sig.Verify(archiveData, provData, filename)
+}
+
+// isTarball checks if a file has a tarball extension
+func IsTarball(filename string) bool {
+	return filepath.Ext(filename) == ".gz" || filepath.Ext(filename) == ".tgz"
+}