crypto: add aes (ecb, ctr, xts)

libraries/libvapours/include/vapours/crypto/impl/crypto_aes_impl.hpp

@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) 2018-2020 Atmosphère-NX
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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/>.
+ */
+
+#pragma once
+#include <vapours/common.hpp>
+#include <vapours/assert.hpp>
+#include <vapours/util.hpp>
+
+
+namespace ams::crypto::impl {
+
+    template<size_t _KeySize>
+    class AesImpl {
+        public:
+            static constexpr size_t KeySize      = _KeySize;
+            static constexpr size_t BlockSize    = 16;
+            static constexpr s32    RoundCount   = (KeySize / 4) + 6;
+            static constexpr size_t RoundKeySize = BlockSize * (RoundCount + 1);
+        private:
+            u32 round_keys[RoundKeySize / sizeof(u32)];
+        public:
+            ~AesImpl();
+
+            void Initialize(const void *key, size_t key_size, bool is_encrypt);
+            void EncryptBlock(void *dst, size_t dst_size, const void *src, size_t src_size) const;
+            void DecryptBlock(void *dst, size_t dst_size, const void *src, size_t src_size) const;
+            const u8 *GetRoundKey() const {
+                return reinterpret_cast<const u8 *>(this->round_keys);
+            }
+    };
+
+    /* static_assert(HashFunction<Sha1Impl>); */
+
+}