From 941a722ff1d862fa7b0c2ba73ff9c003324da281 Mon Sep 17 00:00:00 2001
From: James <jselby@jselby.net>
Date: Mon, 31 Jul 2017 16:59:34 +1000
Subject: [PATCH] Handle invalid filenames when renaming files/directories

---
 src/core/file_sys/archive_sdmc.cpp     | 41 ++++++++++++++++++++++++--
 src/core/file_sys/savedata_archive.cpp | 41 ++++++++++++++++++++++++--
 2 files changed, 78 insertions(+), 4 deletions(-)

diff --git a/src/core/file_sys/archive_sdmc.cpp b/src/core/file_sys/archive_sdmc.cpp
index 679909d06..fe3dce5d4 100644
--- a/src/core/file_sys/archive_sdmc.cpp
+++ b/src/core/file_sys/archive_sdmc.cpp
@@ -121,7 +121,25 @@ ResultCode SDMCArchive::DeleteFile(const Path& path) const {
 }
 
 ResultCode SDMCArchive::RenameFile(const Path& src_path, const Path& dest_path) const {
-    if (FileUtil::Rename(mount_point + src_path.AsString(), mount_point + dest_path.AsString())) {
+    const PathParser path_parser_src(src_path);
+
+    // TODO: Verify these return codes with HW
+    if (!path_parser_src.IsValid()) {
+        LOG_ERROR(Service_FS, "Invalid src path %s", src_path.DebugStr().c_str());
+        return ERROR_INVALID_PATH;
+    }
+
+    const PathParser path_parser_dest(dest_path);
+
+    if (!path_parser_dest.IsValid()) {
+        LOG_ERROR(Service_FS, "Invalid dest path %s", dest_path.DebugStr().c_str());
+        return ERROR_INVALID_PATH;
+    }
+
+    const auto src_path_full = path_parser_src.BuildHostPath(mount_point);
+    const auto dest_path_full = path_parser_dest.BuildHostPath(mount_point);
+
+    if (FileUtil::Rename(src_path_full, dest_path_full)) {
         return RESULT_SUCCESS;
     }
 
@@ -260,8 +278,27 @@ ResultCode SDMCArchive::CreateDirectory(const Path& path) const {
 }
 
 ResultCode SDMCArchive::RenameDirectory(const Path& src_path, const Path& dest_path) const {
-    if (FileUtil::Rename(mount_point + src_path.AsString(), mount_point + dest_path.AsString()))
+    const PathParser path_parser_src(src_path);
+
+    // TODO: Verify these return codes with HW
+    if (!path_parser_src.IsValid()) {
+        LOG_ERROR(Service_FS, "Invalid src path %s", src_path.DebugStr().c_str());
+        return ERROR_INVALID_PATH;
+    }
+
+    const PathParser path_parser_dest(dest_path);
+
+    if (!path_parser_dest.IsValid()) {
+        LOG_ERROR(Service_FS, "Invalid dest path %s", dest_path.DebugStr().c_str());
+        return ERROR_INVALID_PATH;
+    }
+
+    const auto src_path_full = path_parser_src.BuildHostPath(mount_point);
+    const auto dest_path_full = path_parser_dest.BuildHostPath(mount_point);
+
+    if (FileUtil::Rename(src_path_full, dest_path_full)) {
         return RESULT_SUCCESS;
+    }
 
     // TODO(yuriks): This code probably isn't right, it'll return a Status even if the file didn't
     // exist or similar. Verify.
diff --git a/src/core/file_sys/savedata_archive.cpp b/src/core/file_sys/savedata_archive.cpp
index f540c4a93..f8f811ba0 100644
--- a/src/core/file_sys/savedata_archive.cpp
+++ b/src/core/file_sys/savedata_archive.cpp
@@ -106,7 +106,25 @@ ResultCode SaveDataArchive::DeleteFile(const Path& path) const {
 }
 
 ResultCode SaveDataArchive::RenameFile(const Path& src_path, const Path& dest_path) const {
-    if (FileUtil::Rename(mount_point + src_path.AsString(), mount_point + dest_path.AsString())) {
+    const PathParser path_parser_src(src_path);
+
+    // TODO: Verify these return codes with HW
+    if (!path_parser_src.IsValid()) {
+        LOG_ERROR(Service_FS, "Invalid src path %s", src_path.DebugStr().c_str());
+        return ERROR_INVALID_PATH;
+    }
+
+    const PathParser path_parser_dest(dest_path);
+
+    if (!path_parser_dest.IsValid()) {
+        LOG_ERROR(Service_FS, "Invalid dest path %s", dest_path.DebugStr().c_str());
+        return ERROR_INVALID_PATH;
+    }
+
+    const auto src_path_full = path_parser_src.BuildHostPath(mount_point);
+    const auto dest_path_full = path_parser_dest.BuildHostPath(mount_point);
+
+    if (FileUtil::Rename(src_path_full, dest_path_full)) {
         return RESULT_SUCCESS;
     }
 
@@ -247,8 +265,27 @@ ResultCode SaveDataArchive::CreateDirectory(const Path& path) const {
 }
 
 ResultCode SaveDataArchive::RenameDirectory(const Path& src_path, const Path& dest_path) const {
-    if (FileUtil::Rename(mount_point + src_path.AsString(), mount_point + dest_path.AsString()))
+    const PathParser path_parser_src(src_path);
+
+    // TODO: Verify these return codes with HW
+    if (!path_parser_src.IsValid()) {
+        LOG_ERROR(Service_FS, "Invalid src path %s", src_path.DebugStr().c_str());
+        return ERROR_INVALID_PATH;
+    }
+
+    const PathParser path_parser_dest(dest_path);
+
+    if (!path_parser_dest.IsValid()) {
+        LOG_ERROR(Service_FS, "Invalid dest path %s", dest_path.DebugStr().c_str());
+        return ERROR_INVALID_PATH;
+    }
+
+    const auto src_path_full = path_parser_src.BuildHostPath(mount_point);
+    const auto dest_path_full = path_parser_dest.BuildHostPath(mount_point);
+
+    if (FileUtil::Rename(src_path_full, dest_path_full)) {
         return RESULT_SUCCESS;
+    }
 
     // TODO(yuriks): This code probably isn't right, it'll return a Status even if the file didn't
     // exist or similar. Verify.