dll: WIP

src/dll/access.c

@@ -0,0 +1,70 @@
+/**
+ * @file dll/access.c
+ *
+ * @copyright 2015 Bill Zissimopoulos
+ */
+
+#include <dll/library.h>
+
+static GENERIC_MAPPING FspFileGenericMapping =
+{
+    .GenericRead = FILE_GENERIC_READ,
+    .GenericWrite = FILE_GENERIC_WRITE,
+    .GenericExecute = FILE_GENERIC_EXECUTE,
+    .GenericAll = FILE_ALL_ACCESS,
+};
+
+FSP_API PGENERIC_MAPPING FspGetFileGenericMapping(VOID)
+{
+    return &FspFileGenericMapping;
+}
+
+FSP_API NTSTATUS FspOpenAccessToken(FSP_FILE_SYSTEM *FileSystem,
+    FSP_FSCTL_TRANSACT_REQ *Request, PHANDLE PAccessToken)
+{
+    return FspFsctlOpenAccessToken(FileSystem->VolumeHandle, Request->Hint, PAccessToken);
+}
+
+#if 0
+FSP_API NTSTATUS FspAccessCheck(FSP_FILE_SYSTEM *FileSystem,
+    FSP_FSCTL_TRANSACT_REQ *Request, PUINT32 PGrantedAccess)
+{
+    if (0 != FileSystem->AccessCheck)
+        return FileSystem->AccessCheck(FileSystem, Request, PGrantedAccess);
+
+    NTSTATUS Result;
+    PWSTR FileName = (PVOID)Request->Buffer;
+    PSECURITY_DESCRIPTOR SecurityDescriptor = 0;
+    HANDLE AccessToken = 0;
+    DWORD PrivilegeSetLength;
+    BOOLEAN AccessStatus;
+    s
+    *PGrantedAccess = 0;
+
+    SecurityDescriptor = MemAlloc(1024);
+    if (0 == SecurityDescriptor)
+    {
+        Result = STATUS_INSUFFICIENT_RESOURCES;
+        goto exit;
+    }
+
+    Result = FspGetSecurityDescriptor();
+
+    Result = FspOpenAccessToken(FileSystem, Request, &AccessToken);
+    if (!NT_SUCCESS(Result))
+        goto exit;
+
+    if (AccessCheck(&SecurityDescriptor, AccessToken, Request->Req.Create.DesiredAccess,
+        &FspFileGenericMapping, 0, &PrivilegeSetLength, PGrantedAccess, &AccessStatus))
+        Result = AccessStatus ? STATUS_SUCCESS : STATUS_ACCESS_DENIED;
+    else
+        Result = FspNtStatusFromWin32(GetLastError());
+
+exit:
+    if (0 != AccessToken)
+        CloseHandle(AccessToken);
+    MemFree(SecurityDescriptor);
+
+    return Result;
+}
+#endif

src/dll/create.c

@@ -0,0 +1,112 @@
+/**
+ * @file dll/create.c
+ *
+ * @copyright 2015 Bill Zissimopoulos
+ */
+
+#include <dll/library.h>
+
+#if 0
+static NTSTATUS FspFileSystemOpCreate_FileCreate(FSP_FILE_SYSTEM *FileSystem,
+    FSP_FSCTL_TRANSACT_REQ *Request)
+{
+    NTSTATUS Result;
+    DWORD GrantedAccess;
+    PVOID File;
+    FSP_FSCTL_TRANSACT_RSP Response;
+
+    Result = FspAccessCheck(FileSystem, Request, TRUE, &GrantedAccess);
+    if (!NT_SUCCESS(Result))
+        return FspSendResponseWithStatus(FileSystem, Request, Result);
+
+    Result = FileSystem->FileCreate(FileSystem, Request, &File);
+    if (!NT_SUCCESS(Result))
+        return FspSendResponseWithStatus(FileSystem, Request, Result);
+
+    /* !!!: set share access */
+
+    memset(&Response, 0, sizeof Response);
+    Response.Size = sizeof Response;
+    Response.Kind = Request->Kind;
+    Response.Hint = Request->Hint;
+    Response.IoStatus.Status = STATUS_SUCCESS;
+    Response.IoStatus.Information = FILE_CREATED;
+    Response.Rsp.Create.Opened.UserContext = (UINT_PTR)File;
+    Response.Rsp.Create.Opened.GrantedAccess = GrantedAccess;
+    return FspSendResponse(FileSystem, &Response);
+}
+
+static NTSTATUS FspFileSystemOpCreate_FileOpen(FSP_FILE_SYSTEM *FileSystem,
+    FSP_FSCTL_TRANSACT_REQ *Request)
+{
+    NTSTATUS Result;
+    DWORD GrantedAccess;
+    PVOID File;
+    FSP_FSCTL_TRANSACT_RSP Response;
+
+    Result = FspAccessCheck(FileSystem, Request, FALSE, &GrantedAccess);
+    if (!NT_SUCCESS(Result))
+        return FspSendResponseWithStatus(FileSystem, Request, Result);
+
+    Result = FileSystem->FileOpen(FileSystem, Request, &File);
+    if (!NT_SUCCESS(Result))
+        return FspSendResponseWithStatus(FileSystem, Request, Result);
+
+    Result = FspShareCheck(FileSystem, Request, GrantedAccess, File);
+    if (!NT_SUCCESS(Result))
+    {
+        FileSystem->FileCleanupClose(FileSystem, Request, File);
+        return FspSendResponseWithStatus(FileSystem, Request, Result);
+    }
+
+    memset(&Response, 0, sizeof Response);
+    Response.Size = sizeof Response;
+    Response.Kind = Request->Kind;
+    Response.Hint = Request->Hint;
+    Response.IoStatus.Status = STATUS_SUCCESS;
+    Response.IoStatus.Information = FILE_CREATED;
+    Response.Rsp.Create.Opened.UserContext = (UINT_PTR)File;
+    Response.Rsp.Create.Opened.GrantedAccess = GrantedAccess;
+    return FspSendResponse(FileSystem, &Response);
+}
+
+static NTSTATUS FspFileSystemOpCreate_FileOpenIf(FSP_FILE_SYSTEM *FileSystem,
+    FSP_FSCTL_TRANSACT_REQ *Request)
+{
+    return STATUS_INVALID_PARAMETER;
+}
+
+static NTSTATUS FspFileSystemOpCreate_FileOverwrite(FSP_FILE_SYSTEM *FileSystem,
+    FSP_FSCTL_TRANSACT_REQ *Request, BOOLEAN Supersede)
+{
+    return STATUS_INVALID_PARAMETER;
+}
+
+static NTSTATUS FspFileSystemOpCreate_FileOverwriteIf(FSP_FILE_SYSTEM *FileSystem,
+    FSP_FSCTL_TRANSACT_REQ *Request)
+{
+    return STATUS_INVALID_PARAMETER;
+}
+
+FSP_API NTSTATUS FspFileSystemOpCreate(FSP_FILE_SYSTEM *FileSystem,
+    FSP_FSCTL_TRANSACT_REQ *Request)
+{
+    switch ((Request->Req.Create.CreateOptions >> 24) & 0xff)
+    {
+    case FILE_CREATE:
+        return FspFileSystemOpCreate_FileCreate(FileSystem, Request);
+    case FILE_OPEN:
+        return FspFileSystemOpCreate_FileOpen(FileSystem, Request);
+    case FILE_OPEN_IF:
+        return FspFileSystemOpCreate_FileOpenIf(FileSystem, Request);
+    case FILE_OVERWRITE:
+        return FspFileSystemOpCreate_FileOverwrite(FileSystem, Request, FALSE);
+    case FILE_SUPERSEDE:
+        return FspFileSystemOpCreate_FileOverwrite(FileSystem, Request, TRUE);
+    case FILE_OVERWRITE_IF:
+        return FspFileSystemOpCreate_FileOverwriteIf(FileSystem, Request);
+    default:
+        return FspSendResponseWithStatus(FileSystem, Request, STATUS_INVALID_PARAMETER);
+    }
+}
+#endif

src/dll/fsctl.c

@@ -109,3 +109,11 @@ FSP_API NTSTATUS FspFsctlTransact(HANDLE VolumeHandle,
 exit:
     return Result;
 }
+
+FSP_API NTSTATUS FspFsctlOpenAccessToken(HANDLE VolumeHandle,
+    UINT64 Hint, PHANDLE PAccessToken)
+{
+    *PAccessToken = 0;
+
+    return STATUS_NOT_IMPLEMENTED;
+}

src/dll/path.c

@@ -0,0 +1,56 @@
+/**
+ * @file dll/path.c
+ *
+ * @copyright 2015 Bill Zissimopoulos
+ */
+
+#include <dll/library.h>
+
+FSP_API VOID FspPathPrefix(PWSTR Path, PWSTR *PPrefix, PWSTR *PRemain)
+{
+    PWSTR Pointer;
+
+    for (Pointer = Path; *Pointer; Pointer++)
+        if (L'\\' == *Pointer)
+        {
+            *Pointer++ = L'\0';
+            for (; L'\\' == *Pointer; Pointer++)
+                ;
+            break;
+        }
+
+    *PPrefix = Path;
+    *PRemain = Pointer;
+}
+
+FSP_API VOID FspPathSuffix(PWSTR Path, PWSTR *PRemain, PWSTR *PSuffix)
+{
+    PWSTR Pointer, RemainEnd, Suffix = 0;
+
+    for (Pointer = Path; *Pointer;)
+        if (L'\\' == *Pointer)
+        {
+            RemainEnd = Pointer++;
+            for (; L'\\' == *Pointer; Pointer++)
+                ;
+            Suffix = Pointer;
+        }
+        else
+            Pointer++;
+
+    *PRemain = Path;
+    if (Path < Suffix)
+    {
+        *RemainEnd = L'\0';
+        *PSuffix = Suffix;
+    }
+    else
+        *PSuffix = Pointer;
+}
+
+FSP_API VOID FspPathCombine(PWSTR Prefix, PWSTR Suffix)
+{
+    for (; Prefix < Suffix; Prefix++)
+        if (L'\0' == *Prefix)
+            *Prefix = L'\\';
+}