From 0a614f58f49b5d1fc56a5e0817c1c14bc122c049 Mon Sep 17 00:00:00 2001
From: Dave Dykstra <2129743+DrDaveD@users.noreply.github.com>
Date: Fri, 28 Aug 2020 11:59:47 -0500
Subject: [PATCH] add separate message if poll response is not json

---
 path_oidc.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/path_oidc.go b/path_oidc.go
index 456e7e1c..36a3b857 100644
--- a/path_oidc.go
+++ b/path_oidc.go
@@ -462,6 +462,10 @@ func (b *jwtAuthBackend) pathPoll(ctx context.Context, req *logical.Request, d *
 			return nil, errwrap.Wrapf("error polling for device authorization: {{err}}", err)
 		}
 
+		if body[0] != '{' {
+			return nil, fmt.Errorf("issuer response while polling for token is not json: %v", string(body))
+		}
+
 		var tokenOrError struct {
 			*oauth2.Token
 			Error string `json:"error,omitempty"`