From 348ef289db72d233f7133d1c82263cd03f5b8e2e Mon Sep 17 00:00:00 2001
From: Kevin Heifner <heifnerk@objectcomputing.com>
Date: Wed, 10 Jan 2024 10:41:43 -0600
Subject: [PATCH] GH-2060 Add better error if separator not provided correctly

---
 plugins/signature_provider_plugin/signature_provider_plugin.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/plugins/signature_provider_plugin/signature_provider_plugin.cpp b/plugins/signature_provider_plugin/signature_provider_plugin.cpp
index fba48def38..31d928ee55 100644
--- a/plugins/signature_provider_plugin/signature_provider_plugin.cpp
+++ b/plugins/signature_provider_plugin/signature_provider_plugin.cpp
@@ -43,8 +43,10 @@ class signature_provider_plugin_impl {
          auto delim = spec.find("=");
          EOS_ASSERT(delim != std::string::npos, chain::plugin_config_exception, "Missing \"=\" in the key spec pair");
          // public_key can be base64 encoded with trailing `=`
+         // e.g. --signature-provider PUB_BLS_Fmgk<snip>iuA===KEY:PVT_BLS_NZhJ<snip>ZHFu
          while( spec.size() > delim+1 && spec[delim+1] == '=' )
             ++delim;
+         EOS_ASSERT(delim < spec.size() + 1, chain::plugin_config_exception, "Missing spec data in the key spec pair");
          auto pub_key_str = spec.substr(0, delim);
          auto spec_str = spec.substr(delim + 1);