File type for fine-grained signature-verification controlling

grub-core/io/bufio.c

@@ -43,7 +43,8 @@ typedef struct grub_bufio *grub_bufio_t;
 static struct grub_fs grub_bufio_fs;
 
 grub_file_t
-grub_bufio_open (grub_file_t io, int size)
+grub_bufio_open (grub_file_t io,
+		 grub_size_t size)
 {
   grub_file_t file;
   grub_bufio_t bufio = 0;
@@ -57,7 +58,7 @@ grub_bufio_open (grub_file_t io, int size)
   else if (size > GRUB_BUFIO_MAX_SIZE)
     size = GRUB_BUFIO_MAX_SIZE;
 
-  if ((size < 0) || ((unsigned) size > io->size))
+  if (size > io->size)
     size = ((io->size > GRUB_BUFIO_MAX_SIZE) ? GRUB_BUFIO_MAX_SIZE :
             io->size);
 
@@ -81,11 +82,12 @@ grub_bufio_open (grub_file_t io, int size)
 }
 
 grub_file_t
-grub_buffile_open (const char *name, int size)
+grub_buffile_open (const char *name, enum grub_file_type type,
+		   grub_size_t size)
 {
   grub_file_t io, file;
 
-  io = grub_file_open (name);
+  io = grub_file_open (name, type);
   if (! io)
     return 0;
 

grub-core/io/gzio.c

@@ -1125,11 +1125,14 @@ initialize_tables (grub_gzio_t gzio)
    even if IO does not contain data compressed by gzip, return a valid file
    object. Note that this function won't close IO, even if an error occurs.  */
 static grub_file_t
-grub_gzio_open (grub_file_t io, const char *name __attribute__ ((unused)))
+grub_gzio_open (grub_file_t io, enum grub_file_type type)
 {
   grub_file_t file;
   grub_gzio_t gzio = 0;
 
+  if (type & GRUB_FILE_TYPE_NO_DECOMPRESS)
+    return io;
+
   file = (grub_file_t) grub_zalloc (sizeof (*file));
   if (! file)
     return 0;

grub-core/io/lzopio.c

@@ -407,12 +407,14 @@ CORRUPTED:
 }
 
 static grub_file_t
-grub_lzopio_open (grub_file_t io,
-		  const char *name __attribute__ ((unused)))
+grub_lzopio_open (grub_file_t io, enum grub_file_type type)
 {
   grub_file_t file;
   grub_lzopio_t lzopio;
 
+  if (type & GRUB_FILE_TYPE_NO_DECOMPRESS)
+    return io;
+
   file = (grub_file_t) grub_zalloc (sizeof (*file));
   if (!file)
     return 0;

grub-core/io/offset.c

@@ -69,7 +69,8 @@ grub_file_offset_close (grub_file_t file)
 }
 
 grub_file_t
-grub_file_offset_open (grub_file_t parent, grub_off_t start, grub_off_t size)
+grub_file_offset_open (grub_file_t parent, enum grub_file_type type,
+		       grub_off_t start, grub_off_t size)
 {
   struct grub_offset_file *off_data;
   grub_file_t off_file, last_off_file;
@@ -95,10 +96,10 @@ grub_file_offset_open (grub_file_t parent, grub_off_t start, grub_off_t size)
   last_off_file = NULL;
   for (filter = GRUB_FILE_FILTER_COMPRESSION_FIRST;
        off_file && filter <= GRUB_FILE_FILTER_COMPRESSION_LAST; filter++)
-    if (grub_file_filters_enabled[filter])
+    if (grub_file_filters[filter])
       {
 	last_off_file = off_file;
-	off_file = grub_file_filters_enabled[filter] (off_file, parent->name);
+	off_file = grub_file_filters[filter] (off_file, type);
       }
 
   if (!off_file)

grub-core/io/xzio.c

@@ -169,12 +169,14 @@ ERROR:
 }
 
 static grub_file_t
-grub_xzio_open (grub_file_t io,
-		const char *name __attribute__ ((unused)))
+grub_xzio_open (grub_file_t io, enum grub_file_type type)
 {
   grub_file_t file;
   grub_xzio_t xzio;
 
+  if (type & GRUB_FILE_TYPE_NO_DECOMPRESS)
+    return io;
+
   file = (grub_file_t) grub_zalloc (sizeof (*file));
   if (!file)
     return 0;