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-rw-r--r--src/script/lua_api/l_util.cpp8
1 files changed, 6 insertions, 2 deletions
diff --git a/src/script/lua_api/l_util.cpp b/src/script/lua_api/l_util.cpp
index 28ee39fc8..cd63e20c2 100644
--- a/src/script/lua_api/l_util.cpp
+++ b/src/script/lua_api/l_util.cpp
@@ -318,9 +318,13 @@ int ModApiUtil::l_decode_base64(lua_State *L)
NO_MAP_LOCK_REQUIRED;
size_t size;
- const char *data = luaL_checklstring(L, 1, &size);
+ const char *d = luaL_checklstring(L, 1, &size);
+ const std::string data = std::string(d, size);
+
+ if (!base64_is_valid(data))
+ return 0;
- std::string out = base64_decode(std::string(data, size));
+ std::string out = base64_decode(data);
lua_pushlstring(L, out.data(), out.size());
return 1;