From b5fe44ea0f7e5ef6f013d6c97725f93a74fed5ef Mon Sep 17 00:00:00 2001
From: Julien Boeuf <jboeuf@google.com>
Date: Mon, 6 Jun 2016 09:50:38 +0200
Subject: [PATCH] Adding error details for JWT and oauth2.

---
 src/core/lib/security/credentials/jwt/jwt_credentials.c      | 3 ++-
 .../lib/security/credentials/oauth2/oauth2_credentials.c     | 5 +++--
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/core/lib/security/credentials/jwt/jwt_credentials.c b/src/core/lib/security/credentials/jwt/jwt_credentials.c
index 0d29729da1..7f96e5247b 100644
--- a/src/core/lib/security/credentials/jwt/jwt_credentials.c
+++ b/src/core/lib/security/credentials/jwt/jwt_credentials.c
@@ -116,7 +116,8 @@ static void jwt_get_request_metadata(grpc_exec_ctx *exec_ctx,
        GRPC_CREDENTIALS_OK, NULL);
     grpc_credentials_md_store_unref(jwt_md);
   } else {
-    cb(exec_ctx, user_data, NULL, 0, GRPC_CREDENTIALS_ERROR, NULL);
+    cb(exec_ctx, user_data, NULL, 0, GRPC_CREDENTIALS_ERROR,
+       "Could not generate JWT.");
   }
 }
 
diff --git a/src/core/lib/security/credentials/oauth2/oauth2_credentials.c b/src/core/lib/security/credentials/oauth2/oauth2_credentials.c
index 81457183d2..a0e4b6fe8e 100644
--- a/src/core/lib/security/credentials/oauth2/oauth2_credentials.c
+++ b/src/core/lib/security/credentials/oauth2/oauth2_credentials.c
@@ -233,10 +233,11 @@ static void on_oauth2_token_fetcher_http_response(
     c->token_expiration =
         gpr_time_add(gpr_now(GPR_CLOCK_REALTIME), token_lifetime);
     r->cb(exec_ctx, r->user_data, c->access_token_md->entries,
-          c->access_token_md->num_entries, status, NULL);
+          c->access_token_md->num_entries, GRPC_CREDENTIALS_OK, NULL);
   } else {
     c->token_expiration = gpr_inf_past(GPR_CLOCK_REALTIME);
-    r->cb(exec_ctx, r->user_data, NULL, 0, status, NULL);
+    r->cb(exec_ctx, r->user_data, NULL, 0, status,
+          "Error occured when fetching oauth2 token.");
   }
   gpr_mu_unlock(&c->mu);
   grpc_credentials_metadata_request_destroy(r);
-- 
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