Adding error details for JWT and oauth2.

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);