Core/Auth: Refactor client auth key storage to support more future client variants and preserve more information about client version

1 files changed, 72 insertions, 0 deletions

diff --git a/src/server/shared/Realm/ClientBuildInfo.cpp b/src/server/shared/Realm/ClientBuildInfo.cpp
new file mode 100644
index 00000000000..12a4b9ec5a0
--- /dev/null
+++ b/src/server/shared/Realm/ClientBuildInfo.cpp
@@ -0,0 +1,72 @@
+/*
+ * This file is part of the TrinityCore Project. See AUTHORS file for Copyright information
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "ClientBuildInfo.h"
+#include <algorithm>
+#include <cctype>
+
+std::array<char, 5> ClientBuild::ToCharArray(uint32 value)
+{
+    auto normalize = [](uint8 c) -> char
+    {
+        if (!c || std::isprint(c))
+            return char(c);
+        return ' ';
+    };
+
+    std::array<char, 5> chars = { char((value >> 24) & 0xFF), char((value >> 16) & 0xFF), char((value >> 8) & 0xFF), char(value & 0xFF), '\0' };
+
+    auto firstNonZero = std::ranges::find_if(chars, [](char c) { return c != '\0'; });
+    if (firstNonZero != chars.end())
+    {
+        // move leading zeros to end
+        std::ranges::rotate(chars, firstNonZero);
+
+        // ensure we only have printable characters remaining
+        std::ranges::transform(chars, chars.begin(), normalize);
+    }
+
+    return chars;
+}
+
+bool ClientBuild::Platform::IsValid(std::string_view platform)
+{
+    if (platform.length() > sizeof(uint32))
+        return false;
+
+    uint32 platformInt = 0;
+    for (uint8 c : platform)
+    {
+        platformInt <<= 8;
+        platformInt |= c;
+    }
+
+    switch (platformInt)
+    {
+        case Win_x86:
+        case Win_x64:
+        case Win_arm64:
+        case Mac_x86:
+        case Mac_x64:
+        case Mac_arm64:
+            return true;
+        default:
+            break;
+    }
+
+    return false;
+}