Rework mount folder structure

Signed-off-by: Daniel Weiße <dw@edgeless.systems>

mount/kms/static.go

@@ -0,0 +1,24 @@
+package kms
+
+import (
+	"context"
+)
+
+// staticKMS is a KMS only returning keys containing of 0x41 bytes for every request.
+// Use for testing ONLY.
+type staticKMS struct{}
+
+// NewStaticKMS creates a new StaticKMS.
+// Use for testing ONLY.
+func NewStaticKMS() *staticKMS {
+	return &staticKMS{}
+}
+
+// GetDEK returns the key of staticKMS.
+func (k *staticKMS) GetDEK(ctx context.Context, kekID, dekID string, dekSize int) ([]byte, error) {
+	key := make([]byte, dekSize)
+	for i := range key {
+		key[i] = 0x41
+	}
+	return key, nil
+}