add Sid class

It's another newcomer straight from privilege-check.

2 files changed, 59 insertions, 0 deletions

diff --git a/include/winapi/sid.hpp b/include/winapi/sid.hpp
new file mode 100644
index 0000000..f418b89
--- /dev/null
+++ b/include/winapi/sid.hpp
@@ -0,0 +1,43 @@
+// Copyright (c) 2020 Egor Tensin <Egor.Tensin@gmail.com>
+// This file is part of the "winapi-common" project.
+// For details, see https://github.com/egor-tensin/winapi-common.
+// Distributed under the MIT License.
+
+#pragma once
+
+#include "buffer.hpp"
+
+#include <boost/config.hpp>
+
+#include <windows.h>
+
+#include <cstddef>
+#include <string>
+
+namespace winapi {
+
+class Sid {
+public:
+    BOOST_STATIC_CONSTEXPR std::size_t MAX_SID_SIZE = SECURITY_MAX_SID_SIZE;
+
+    typedef SID Impl;
+
+    static Sid well_known(WELL_KNOWN_SID_TYPE type);
+
+    static Sid builtin_administrators();
+
+    explicit Sid(const Buffer& buffer) : m_buffer(buffer) {}
+
+    explicit operator SID&() { return get_impl(); }
+    explicit operator const SID&() const { return get_impl(); }
+
+    std::string to_string() const;
+
+private:
+    Impl& get_impl() { return *reinterpret_cast<SID*>(m_buffer.data()); }
+    const Impl& get_impl() const { return *reinterpret_cast<const SID*>(m_buffer.data()); }
+
+    Buffer m_buffer;
+};
+
+} // namespace winapi
diff --git a/include/winapi/workarounds.hpp b/include/winapi/utils.hpp
index a5a3607..8e8407c 100644
--- a/include/winapi/workarounds.hpp
+++ b/include/winapi/utils.hpp
@@ -5,4 +5,20 @@
 
 #pragma once
 
+#include <windows.h>
+
+#include <cassert>
+
 #define WINAPI_UNUSED_PARAMETER(...) (void)(__VA_ARGS__)
+
+namespace winapi {
+
+struct LocalDelete {
+    void operator()(void* ptr) const {
+        const auto ret = ::LocalFree(ptr);
+        assert(ret == NULL);
+        WINAPI_UNUSED_PARAMETER(ret);
+    }
+};
+
+} // namespace winapi