fs: add Sha256HashGenerator, LZ4 decompressor

libraries/libstratosphere/include/stratosphere/fssystem.hpp

@@ -48,4 +48,5 @@
 #include <stratosphere/fssystem/save/fssystem_buffered_storage.hpp>
 #include <stratosphere/fssystem/save/fssystem_hierarchical_integrity_verification_storage.hpp>
 #include <stratosphere/fssystem/fssystem_integrity_romfs_storage.hpp>
+#include <stratosphere/fssystem/fssystem_sha256_hash_generator.hpp>
 #include <stratosphere/fssystem/fssystem_file_system_proxy_api.hpp>

libraries/libstratosphere/include/stratosphere/fssystem/fssystem_compressed_storage.hpp

@@ -66,6 +66,7 @@ namespace ams::fssystem {
         public:
             virtual Result QueryAppropriateOffset(s64 *out, s64 offset, s64 access_size, s64 alignment_size) override {
                 AMS_ABORT("TODO");
+                AMS_UNUSED(out, offset, access_size, alignment_size);
                 /* return m_core.QueryAppropriateOffsetForAsynchronousAccess(out, offset, access_size, alignment_size); */
             }
         public:
@@ -74,6 +75,7 @@ namespace ams::fssystem {
 
             virtual Result GetSize(s64 *out) override {
                 AMS_ABORT("TODO");
+                AMS_UNUSED(out);
                 /* return m_core.GetSize(out); */
             }
 

libraries/libstratosphere/include/stratosphere/fssystem/fssystem_compression_common.hpp

@@ -40,7 +40,7 @@ namespace ams::fssystem {
         }
 
         constexpr bool IsRandomAccessible(CompressionType type) {
-            return CompressionType_None;
+            return type == CompressionType_None;
         }
 
         constexpr bool IsUnknownType(CompressionType type) {

libraries/libstratosphere/include/stratosphere/fssystem/fssystem_sha256_hash_generator.hpp

@@ -0,0 +1,71 @@
+/*
+ * 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.hpp>
+#include <stratosphere/fssystem/fssystem_i_hash_256_generator.hpp>
+
+namespace ams::fssystem {
+
+    class Sha256HashGenerator final : public ::ams::fssystem::IHash256Generator, public ::ams::fs::impl::Newable {
+        NON_COPYABLE(Sha256HashGenerator);
+        NON_MOVEABLE(Sha256HashGenerator);
+        private:
+            crypto::Sha256Generator m_generator;
+        public:
+            Sha256HashGenerator() = default;
+        protected:
+            virtual void DoInitialize() override {
+                m_generator.Initialize();
+            }
+
+            virtual void DoUpdate(const void *data, size_t size) override {
+                m_generator.Update(data, size);
+            }
+
+            virtual void DoGetHash(void *dst, size_t dst_size) override {
+                m_generator.GetHash(dst, dst_size);
+            }
+    };
+
+    class Sha256HashGeneratorFactory final : public IHash256GeneratorFactory, public ::ams::fs::impl::Newable {
+        NON_COPYABLE(Sha256HashGeneratorFactory);
+        NON_MOVEABLE(Sha256HashGeneratorFactory);
+        public:
+            Sha256HashGeneratorFactory() = default;
+        protected:
+            virtual std::unique_ptr<IHash256Generator> DoCreate() override {
+                return std::unique_ptr<IHash256Generator>(new Sha256HashGenerator());
+            }
+
+            virtual void DoGenerateHash(void *dst, size_t dst_size, const void *src, size_t src_size) override {
+                crypto::GenerateSha256Hash(dst, dst_size, src, src_size);
+            }
+    };
+
+    class Sha256HashGeneratorFactorySelector final : public IHash256GeneratorFactorySelector, public ::ams::fs::impl::Newable {
+        NON_COPYABLE(Sha256HashGeneratorFactorySelector);
+        NON_MOVEABLE(Sha256HashGeneratorFactorySelector);
+        private:
+            Sha256HashGeneratorFactory m_factory;
+        public:
+            Sha256HashGeneratorFactorySelector() = default;
+        protected:
+            virtual IHash256GeneratorFactory *DoGetFactory() override {
+                return std::addressof(m_factory);
+            }
+    };
+
+}

libraries/libstratosphere/include/stratosphere/fssystem/save/fssystem_integrity_verification_storage.hpp

@@ -82,7 +82,7 @@ namespace ams::fssystem::save {
             void CalcBlockHash(BlockHash *out, const void *buffer, size_t block_size, std::unique_ptr<fssystem::IHash256Generator> &generator) const;
 
             void CalcBlockHash(BlockHash *out, const void *buffer, std::unique_ptr<fssystem::IHash256Generator> &generator) const {
-                return this->CalcBlockHash(out, buffer, static_cast<size_t>(m_verification_block_size));
+                return this->CalcBlockHash(out, buffer, static_cast<size_t>(m_verification_block_size), generator);
             }
 
             Result IsCleared(bool *is_cleared, const BlockHash &hash);