Refactor RDP proxy handling and update related tests

agents/rap-node-agent/internal/webingress/signer_test.go

@@ -0,0 +1,80 @@
+package webingress
+
+import (
+	"context"
+	"crypto/ed25519"
+	"crypto/rand"
+	"encoding/base64"
+	"errors"
+	"testing"
+)
+
+func TestEd25519EnvelopeSignerSignsCanonicalEnvelope(t *testing.T) {
+	publicKey, privateKey, err := ed25519.GenerateKey(rand.Reader)
+	if err != nil {
+		t.Fatalf("generate key: %v", err)
+	}
+	signer, err := NewEd25519EnvelopeSigner(base64.StdEncoding.EncodeToString(privateKey), "")
+	if err != nil {
+		t.Fatalf("new signer: %v", err)
+	}
+	signer.Now = fixedEnvelopeNow
+
+	signature, err := signer.Sign(context.Background(), []byte(`{"schema_version":"test"}`))
+	if err != nil {
+		t.Fatalf("sign: %v", err)
+	}
+	decoded, err := base64.StdEncoding.DecodeString(signature.Signature)
+	if err != nil {
+		t.Fatalf("decode signature: %v", err)
+	}
+	if !ed25519.Verify(publicKey, []byte(`{"schema_version":"test"}`), decoded) {
+		t.Fatal("signature did not verify")
+	}
+	if signature.KeyID != ed25519EnvelopeKeyID(publicKey) ||
+		signature.Alg != "ed25519" ||
+		signature.SignedAt != "2026-05-17T00:00:01Z" {
+		t.Fatalf("signature metadata = %+v", signature)
+	}
+}
+
+func TestEd25519EnvelopeSignerUsesExplicitKeyID(t *testing.T) {
+	_, privateKey, err := ed25519.GenerateKey(rand.Reader)
+	if err != nil {
+		t.Fatalf("generate key: %v", err)
+	}
+	signer, err := NewEd25519EnvelopeSigner(base64.RawStdEncoding.EncodeToString(privateKey), "node-explicit")
+	if err != nil {
+		t.Fatalf("new signer: %v", err)
+	}
+	signature, err := signer.Sign(context.Background(), []byte(`{}`))
+	if err != nil {
+		t.Fatalf("sign: %v", err)
+	}
+	if signature.KeyID != "node-explicit" {
+		t.Fatalf("key id = %q", signature.KeyID)
+	}
+}
+
+func TestEd25519EnvelopeSignerRejectsInvalidKeyAndPayload(t *testing.T) {
+	_, err := NewEd25519EnvelopeSigner("not-base64", "")
+	if !errors.Is(err, ErrFabricEnvelopeSigningKeyInvalid) {
+		t.Fatalf("invalid key error = %v", err)
+	}
+
+	signer := Ed25519EnvelopeSigner{}
+	_, err = signer.Sign(context.Background(), []byte(`{}`))
+	if !errors.Is(err, ErrFabricEnvelopeSigningKeyInvalid) {
+		t.Fatalf("missing key error = %v", err)
+	}
+
+	_, privateKey, err := ed25519.GenerateKey(rand.Reader)
+	if err != nil {
+		t.Fatalf("generate key: %v", err)
+	}
+	signer = Ed25519EnvelopeSigner{PrivateKey: privateKey}
+	_, err = signer.Sign(context.Background(), nil)
+	if !errors.Is(err, ErrFabricEnvelopeSigningKeyInvalid) {
+		t.Fatalf("empty canonical error = %v", err)
+	}
+}