util: move EncryptionType(s) to pkg/util/crypto

Signed-off-by: Niels de Vos <ndevos@ibm.com>

pkg/util/crypto/types.go

@@ -0,0 +1,63 @@
+/*
+Copyright 2025 The Ceph-CSI 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 crypto
+
+type EncryptionType int
+
+const (
+	// EncryptionTypeInvalid signals invalid or unsupported configuration.
+	EncryptionTypeInvalid EncryptionType = iota
+	// EncryptionTypeNone disables encryption.
+	EncryptionTypeNone
+	// EncryptionTypeBlock enables block encryption.
+	EncryptionTypeBlock
+	// EncryptionTypeBlock enables file encryption (fscrypt).
+	EncryptionTypeFile
+)
+
+const (
+	encryptionTypeBlockString = "block"
+	encryptionTypeFileString  = "file"
+)
+
+func ParseEncryptionType(typeStr string) EncryptionType {
+	switch typeStr {
+	case encryptionTypeBlockString:
+		return EncryptionTypeBlock
+	case encryptionTypeFileString:
+		return EncryptionTypeFile
+	case "":
+		return EncryptionTypeNone
+	default:
+		return EncryptionTypeInvalid
+	}
+}
+
+func (encType EncryptionType) String() string {
+	switch encType {
+	case EncryptionTypeBlock:
+		return encryptionTypeBlockString
+	case EncryptionTypeFile:
+		return encryptionTypeFileString
+	case EncryptionTypeNone:
+		return ""
+	case EncryptionTypeInvalid:
+		return "INVALID"
+	default:
+		return "UNKNOWN"
+	}
+}

pkg/util/crypto/types_test.go

@@ -0,0 +1,38 @@
+/*
+Copyright 2025 Ceph-CSI 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 crypto
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestEncryptionType(t *testing.T) {
+	t.Parallel()
+	require.EqualValues(t, EncryptionTypeInvalid, ParseEncryptionType("wat?"))
+	require.EqualValues(t, EncryptionTypeInvalid, ParseEncryptionType("both"))
+	require.EqualValues(t, EncryptionTypeInvalid, ParseEncryptionType("file,block"))
+	require.EqualValues(t, EncryptionTypeInvalid, ParseEncryptionType("block,file"))
+	require.EqualValues(t, EncryptionTypeBlock, ParseEncryptionType("block"))
+	require.EqualValues(t, EncryptionTypeFile, ParseEncryptionType("file"))
+	require.EqualValues(t, EncryptionTypeNone, ParseEncryptionType(""))
+
+	for _, s := range []string{"file", "block", ""} {
+		require.EqualValues(t, s, ParseEncryptionType(s).String())
+	}
+}