crypto: implement md5, which now used by sprof

libraries/libvapours/include/vapours/crypto/impl/crypto_md5_impl.hpp

@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) 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>
+#include <vapours/crypto/impl/crypto_hash_function.hpp>
+#include <vapours/crypto/crypto_memory_clear.hpp>
+
+
+namespace ams::crypto::impl {
+
+    class Md5Impl {
+        public:
+            static constexpr size_t HashSize       = 0x10;
+            static constexpr size_t BlockSize      = 0x40;
+        private:
+            enum State {
+                State_None        = 0,
+                State_Initialized = 1,
+                State_Done        = 2,
+            };
+        private:
+            union {
+                struct {
+                    u32 a, b, c, d;
+                } p;
+                u32 state[4];
+            } m_x;
+            alignas(8) u8 m_y[BlockSize];
+            size_t m_size;
+            State m_state;
+        public:
+            Md5Impl() : m_state(State_None) { /* ... */ }
+            ~Md5Impl() { ClearMemory(this, sizeof(*this)); }
+
+            void Initialize();
+            void Update(const void *data, size_t size);
+            void GetHash(void *dst, size_t size);
+        private:
+            void ProcessBlock();
+            void ProcessLastBlock();
+    };
+
+    /* static_assert(HashFunction<Md5Impl>); */
+
+}