Adds crypto/spiffe/context

Signed-off-by: joshvanl <[email protected]>

crypto/spiffe/context/context.go

@@ -0,0 +1,35 @@
+/*
+Copyright 2024 The Dapr 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 context
+
+import (
+	"context"
+
+	"github.com/spiffe/go-spiffe/v2/svid/x509svid"
+
+	"github.com/dapr/kit/crypto/spiffe"
+)
+
+type ctxkey int
+
+const svidKey ctxkey = iota
+
+func With(ctx context.Context, spiffe *spiffe.SPIFFE) context.Context {
+	return context.WithValue(ctx, svidKey, spiffe.SVIDSource())
+}
+
+func From(ctx context.Context) (x509svid.Source, bool) {
+	svid, ok := ctx.Value(svidKey).(x509svid.Source)
+	return svid, ok
+}