Return status.bearerToken, not status.value, from minted tokens

ext.cattle.io token creation returns TWO fields: status.value (just the secret
fragment) and status.bearerToken (the full usable credential, formatted
ext/<name>:<secret>). The plugin was returning status.value, so every minted
credential and every rotated root token was non-functional (401 against
Rancher). Verified: bearerToken authenticates (HTTP 200), value alone does not.

- client.go: MintToken returns status.bearerToken, falling back to status.value
  only if a Rancher build omits it.
- Reflect bearerToken in the mock Rancher and unit-test fake; assert the minted
  token is the ext/ bearer form.

backend_test.go

@@ -48,10 +48,10 @@ func (f *fakeRancher) server(t *testing.T) *httptest.Server {
 			_ = json.NewDecoder(r.Body).Decode(&in)
 			f.minted++
 			newName := in.Metadata.GenerateName + "abcd"
-			value := "token-" + newName
+			bearer := "ext/" + newName + ":secret"
 			f.byName[newName] = in.Spec.ClusterName
-			f.valid[value] = newName
-			out := token{Metadata: tokenMetadata{Name: newName}, Status: tokenStatus{Value: value}}
+			f.valid[bearer] = newName
+			out := token{Metadata: tokenMetadata{Name: newName}, Status: tokenStatus{BearerToken: bearer, Value: "secret"}}
 			w.Header().Set("Content-Type", "application/json")
 			w.WriteHeader(http.StatusCreated)
 			_ = json.NewEncoder(w).Encode(out)
@@ -150,9 +150,15 @@ func TestLifecycle(t *testing.T) {
 		t.Fatal("creds returned no secret")
 	}
 	tokenName, _ := creds.Data["token_name"].(string)
-	if tokenName == "" || creds.Data["token"].(string) == "" {
+	tokenVal, _ := creds.Data["token"].(string)
+	if tokenName == "" || tokenVal == "" {
 		t.Fatal("creds missing token/token_name")
 	}
+	// Must be the usable bearer credential (ext/<name>:<secret>), not the bare
+	// secret fragment from status.value — see the bearerToken fix.
+	if !strings.HasPrefix(tokenVal, "ext/") {
+		t.Errorf("token = %q, want the ext/ bearerToken form", tokenVal)
+	}
 	if creds.Data["cluster_name"].(string) != "c-m-abc123" {
 		t.Errorf("cluster_name = %q, want c-m-abc123", creds.Data["cluster_name"])
 	}

client.go

@@ -59,8 +59,13 @@ type tokenSpec struct {
 }
 
 type tokenStatus struct {
-	// Value is the usable token string. It is returned only in the creation
-	// response and never again.
+	// BearerToken is the full, usable credential for the Authorization header —
+	// ext.cattle.io tokens are of the form "ext/<name>:<secret>". It is returned
+	// only in the creation response and never again. This is the field to use;
+	// Value alone is just the secret fragment and does NOT authenticate.
+	BearerToken string `json:"bearerToken,omitempty"`
+	// Value is the secret fragment. Kept as a fallback for Rancher builds that
+	// don't populate bearerToken.
 	Value string `json:"value,omitempty"`
 }
 
@@ -124,10 +129,16 @@ func (c *rancherClient) MintToken(ctx context.Context, req mintRequest) (value,
 	if err := c.do(ctx, http.MethodPost, tokensAPIPath, body, &out); err != nil {
 		return "", "", err
 	}
-	if out.Status.Value == "" {
+	// Prefer bearerToken ("ext/<name>:<secret>") — the field that actually
+	// authenticates. Fall back to value only if a Rancher build omits it.
+	tok := out.Status.BearerToken
+	if tok == "" {
+		tok = out.Status.Value
+	}
+	if tok == "" {
 		return "", "", errors.New("rancher returned an empty token value")
 	}
-	return out.Status.Value, out.Metadata.Name, nil
+	return tok, out.Metadata.Name, nil
 }
 
 // DeleteToken removes a Token by its resource name. A missing token is success.

test/mockrancher/main.go

@@ -31,7 +31,8 @@ type tokenSpec struct {
 }
 
 type tokenStatus struct {
-	Value string `json:"value,omitempty"`
+	BearerToken string `json:"bearerToken,omitempty"`
+	Value       string `json:"value,omitempty"`
 }
 
 type token struct {
@@ -88,16 +89,19 @@ func (s *store) handle(w http.ResponseWriter, r *http.Request) {
 		if newName == "" {
 			newName = req.Metadata.GenerateName + randHex(4)
 		}
-		value := "token-" + newName + ":" + randHex(16)
+		// ext.cattle.io returns the usable credential in status.bearerToken,
+		// formatted "ext/<name>:<secret>"; status.value is only the secret.
+		secret := randHex(16)
+		bearer := "ext/" + newName + ":" + secret
 		t := &token{
 			APIVersion: "ext.cattle.io/v1",
 			Kind:       "Token",
 			Metadata:   tokenMeta{Name: newName},
 			Spec:       req.Spec,
-			Status:     tokenStatus{Value: value},
+			Status:     tokenStatus{BearerToken: bearer, Value: secret},
 		}
 		s.tokens[newName] = t
-		s.valid[value] = newName
+		s.valid[bearer] = newName
 		writeJSON(w, http.StatusCreated, t)
 	case r.Method == http.MethodGet && name != "": // read
 		t, ok := s.tokens[name]