Core/Authserver: Authserver cleanup (PR#25093)

- Fix a handful of 1/256 bugs with most significant byte zero in BigNumber
- Get rid of (most of) the C-style arrays in authserver
- CryptoRandom as a unified source for cryptographic randomness
- Bring our other crypto APIs into 2020
- BigNumber usability improvements
- Authserver is now actually readable as a result of all of the above

1 files changed, 43 insertions, 0 deletions

diff --git a/src/common/Cryptography/CryptoRandom.h b/src/common/Cryptography/CryptoRandom.h
new file mode 100644
index 00000000000..f5ede4e992e
--- /dev/null
+++ b/src/common/Cryptography/CryptoRandom.h
@@ -0,0 +1,43 @@
+/*
+ * 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/>.
+ */
+
+#ifndef TRINITY_CRYPTORANDOM_H
+#define TRINITY_CRYPTORANDOM_H
+
+#include "Define.h"
+#include <array>
+
+namespace Trinity::Crypto
+{
+    void TC_COMMON_API GetRandomBytes(uint8* buf, size_t len);
+
+    template <typename Container>
+    void GetRandomBytes(Container& c)
+    {
+        GetRandomBytes(std::data(c), std::size(c));
+    }
+
+    template <size_t S>
+    std::array<uint8, S> GetRandomBytes()
+    {
+        std::array<uint8, S> arr;
+        GetRandomBytes(arr);
+        return arr;
+    }
+}
+
+#endif