Add missing file

Signed-off-by: Kevin Fox <Kevin.Fox@pnnl.gov>

cmd/spire-trust-sync-helper.go

@@ -0,0 +1,60 @@
+package main
+
+import (
+	"encoding/base64"
+	"encoding/json"
+	"fmt"
+	"os"
+
+	"github.com/spiffe/go-spiffe/v2/bundle/jwtbundle"
+	"github.com/spiffe/go-spiffe/v2/bundle/spiffebundle"
+	"github.com/spiffe/go-spiffe/v2/bundle/x509bundle"
+	"github.com/spiffe/go-spiffe/v2/spiffeid"
+)
+
+func main() {
+	var rawBundles map[string]string
+	if os.Getenv("SPIFFE_TRUST_DOMAIN") == "" {
+		fmt.Printf("SPIFFE_TRUST_DOMAIN must be set.")
+		os.Exit(1)
+	}
+	tde := os.Getenv("SPIFFE_TRUST_DOMAIN")
+	data, err := os.ReadFile("jwt_bundle.json")
+	if err != nil {
+		fmt.Printf("Failed to read jwt_bundle.json: %s", err)
+		os.Exit(2)
+	}
+	json.Unmarshal(data, &rawBundles)
+	decBundle := make([]byte, base64.StdEncoding.DecodedLen(len(rawBundles[tde])))
+	n, err := base64.StdEncoding.Decode(decBundle, []byte(rawBundles[tde]))
+	if err != nil {
+		fmt.Printf("Failed to decode jwt_bundle.json: %s\n", err)
+		os.Exit(3)
+	}
+	bundle := decBundle[:n]
+	td, err := spiffeid.TrustDomainFromString("spiffe://spire-ha")
+	if err != nil {
+		fmt.Printf("Could not build trust domain object: %s\n", err)
+		os.Exit(4)
+	}
+	jbundle, err := jwtbundle.Parse(td, bundle)
+	if err != nil {
+		fmt.Printf("Failed to parse jwt_bundle.json: %s\n", err)
+		os.Exit(5)
+	}
+	sb := spiffebundle.FromJWTAuthorities(td, jbundle.JWTAuthorities())
+	xb, err := x509bundle.Load(td, "ca.crt")
+	if err != nil {
+		fmt.Printf("Failed to load ca.crt: %s\n", err)
+		os.Exit(6)
+	}
+	for _, a := range xb.X509Authorities() {
+		sb.AddX509Authority(a)
+	}
+	final, err := sb.Marshal()
+	if err != nil {
+		fmt.Printf("Failed to marshal the bundle: %s\n", err)
+		os.Exit(7)
+	}
+	fmt.Printf("%s\n", final)
+}