Add key length to error message

Author: lriggs

cpp/src/gandiva/gdv_function_stubs.cc

@@ -320,7 +320,7 @@ const char* gdv_fn_aes_encrypt(int64_t context, const char* data, int32_t data_l
   if (key_data_len == 16 || key_data_len == 24 || key_data_len == 32) {
     kAesBlockSize = static_cast<int64_t>(key_data_len);
   } else {
-    gdv_fn_context_set_error_msg(context, "invalid key length");
+    gdv_fn_context_set_error_msg(context, "invalid key length: " + std::to_string(key_data_len));
     *out_len = 0;
     return nullptr;
   }
@@ -362,7 +362,7 @@ const char* gdv_fn_aes_decrypt(int64_t context, const char* data, int32_t data_l
   if (key_data_len == 16 || key_data_len == 24 || key_data_len == 32) {
     kAesBlockSize = static_cast<int64_t>(key_data_len);
   } else {
-    gdv_fn_context_set_error_msg(context, "invalid key length");
+    gdv_fn_context_set_error_msg(context, "invalid key length: " + std::to_string(key_data_len));
     *out_len = 0;
     return nullptr;
   }