feat(controller): Add authtoken public id to request context

This allows for http middleware handler functions that run later in the
handler function stack to have access to the extracted auth token public
id.

(cherry picked from commit e337cf8f69)

globals/globals.go

@@ -17,6 +17,7 @@ const (
 type (
 	ContextMaxRequestSizeType      struct{}
 	ContextOriginalRequestPathType struct{}
+	ContextAuthTokenPublicIdType   struct{}
 )
 
 var (
@@ -30,6 +31,10 @@ var (
 	// about clashing string identifiers
 	ContextMaxRequestSizeTypeKey ContextMaxRequestSizeType
 
+	// ContextAuthTokenPublicIdKey is a value to keep linters from complaining
+	// about clashing string identifiers
+	ContextAuthTokenPublicIdKey ContextAuthTokenPublicIdType
+
 	// ContextOriginalRequestPathTypeKey is a value to keep linters from complaining
 	// about clashing string identifiers
 	ContextOriginalRequestPathTypeKey ContextOriginalRequestPathType

internal/daemon/controller/handler.go

@@ -411,6 +411,7 @@ func wrapHandlerWithCommonFuncs(h http.Handler, c *Controller, props HandlerProp
 		}
 
 		requestInfo.PublicId, requestInfo.EncryptedToken, requestInfo.TokenFormat = auth.GetTokenFromRequest(ctx, c.kms, r)
+		ctx = context.WithValue(ctx, globals.ContextAuthTokenPublicIdKey, requestInfo.PublicId)
 
 		if info, ok := event.RequestInfoFromContext(ctx); ok {
 			// piggyback some eventing fields with the auth info proto message