From 0b61c3b7b1399f5dd0cab90da36002b7d8e0af6b Mon Sep 17 00:00:00 2001
From: Treeston <treeston.mmoc@gmail.com>
Date: Sat, 10 Aug 2019 21:34:51 +0200
Subject: [3.3.5] Core/Authserver: TOTP rewrite: (PR #23633)

- Proper management commands (.account 2fa)
- Secrets can now be encrypted (set TOTPTokenSecret in .conf)
- Secret now stored in binary
- Argon2 and AES primitives
- Base32/64 support

(cherry picked from commit 4211645834c467a03c60248e80818d3607be9ea7)
---
 src/common/Encoding/Base32.cpp | 54 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 54 insertions(+)
 create mode 100644 src/common/Encoding/Base32.cpp

(limited to 'src/common/Encoding/Base32.cpp')

diff --git a/src/common/Encoding/Base32.cpp b/src/common/Encoding/Base32.cpp
new file mode 100644
index 00000000000..6866536848c
--- /dev/null
+++ b/src/common/Encoding/Base32.cpp
@@ -0,0 +1,54 @@
+/*
+ * 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 "Base32.h"
+#include "BaseEncoding.h"
+#include "Errors.h"
+
+struct B32Impl
+{
+    static constexpr std::size_t BITS_PER_CHAR = 5;
+
+    static constexpr char PADDING = '=';
+    static constexpr char Encode(uint8 v)
+    {
+        ASSERT(v < 0x20);
+        if (v < 26) return 'A'+v;
+        else        return '2' + (v-26);
+    }
+
+    static constexpr uint8 DECODE_ERROR = 0xff;
+    static constexpr uint8 Decode(uint8 v)
+    {
+        if (v == '0') return Decode('O');
+        if (v == '1') return Decode('l');
+        if (('A' <= v) && (v <= 'Z')) return (v-'A');
+        if (('a' <= v) && (v <= 'z')) return (v-'a');
+        if (('2' <= v) && (v <= '8')) return (v-'2')+26;
+        return DECODE_ERROR;
+    }
+};
+
+/*static*/ std::string Trinity::Encoding::Base32::Encode(std::vector<uint8> const& data)
+{
+    return Trinity::Impl::GenericBaseEncoding<B32Impl>::Encode(data);
+}
+
+/*static*/ Optional<std::vector<uint8>> Trinity::Encoding::Base32::Decode(std::string const& data)
+{
+    return Trinity::Impl::GenericBaseEncoding<B32Impl>::Decode(data);
+}
-- 
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