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grub2/grub-core/commands/keylayouts.c
Vladimir Serbinenko ca0a4f689a verifiers: File type for fine-grained signature-verification controlling 
Let's provide file type info to the I/O layer. This way verifiers
framework and its users will be able to differentiate files and verify
only required ones.

This is preparatory patch.

Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Signed-off-by: Daniel Kiper <daniel.kiper@oracle.com>
Reviewed-by: Ross Philipson <ross.philipson@oracle.com>
2018-11-09 13:25:31 +01:00

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/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2002,2003,2005,2007,2008,2009 Free Software Foundation, Inc.
*
* GRUB is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GRUB is distributed in the hope that 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 GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#include <grub/term.h>
#include <grub/err.h>
#include <grub/mm.h>
#include <grub/misc.h>
#include <grub/env.h>
#include <grub/time.h>
#include <grub/dl.h>
#include <grub/keyboard_layouts.h>
#include <grub/command.h>
#include <grub/i18n.h>
#include <grub/file.h>
GRUB_MOD_LICENSE ("GPLv3+");
static struct grub_keyboard_layout layout_us = {
.keyboard_map = {
/* Keyboard errors. Handled by driver. */
/* 0x00 */ 0, 0, 0, 0,
/* 0x04 */ 'a', 'b', 'c', 'd',
/* 0x08 */ 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l',
/* 0x10 */ 'm', 'n', 'o', 'p', 'q', 'r', 's', 't',
/* 0x18 */ 'u', 'v', 'w', 'x', 'y', 'z', '1', '2',
/* 0x20 */ '3', '4', '5', '6', '7', '8', '9', '0',
/* 0x28 */ '\n', GRUB_TERM_ESC, GRUB_TERM_BACKSPACE, GRUB_TERM_TAB, ' ', '-', '=', '[',
/* According to usage table 0x31 should be mapped to '/'
but testing with real keyboard shows that 0x32 is remapped to '/'.
Map 0x31 to 0.
*/
/* 0x30 */ ']', 0, '\\', ';', '\'', '`', ',', '.',
/* 0x39 is CapsLock. Handled by driver. */
/* 0x38 */ '/', 0, GRUB_TERM_KEY_F1, GRUB_TERM_KEY_F2,
/* 0x3c */ GRUB_TERM_KEY_F3, GRUB_TERM_KEY_F4,
/* 0x3e */ GRUB_TERM_KEY_F5, GRUB_TERM_KEY_F6,
/* 0x40 */ GRUB_TERM_KEY_F7, GRUB_TERM_KEY_F8,
/* 0x42 */ GRUB_TERM_KEY_F9, GRUB_TERM_KEY_F10,
/* 0x44 */ GRUB_TERM_KEY_F11, GRUB_TERM_KEY_F12,
/* PrtScr and ScrollLock. Not handled yet. */
/* 0x46 */ 0, 0,
/* 0x48 is Pause. Not handled yet. */
/* 0x48 */ 0, GRUB_TERM_KEY_INSERT,
/* 0x4a */ GRUB_TERM_KEY_HOME, GRUB_TERM_KEY_PPAGE,
/* 0x4c */ GRUB_TERM_KEY_DC, GRUB_TERM_KEY_END,
/* 0x4e */ GRUB_TERM_KEY_NPAGE, GRUB_TERM_KEY_RIGHT,
/* 0x50 */ GRUB_TERM_KEY_LEFT, GRUB_TERM_KEY_DOWN,
/* 0x53 is NumLock. Handled by driver. */
/* 0x52 */ GRUB_TERM_KEY_UP, 0,
/* 0x54 */ '/', '*',
/* 0x56 */ '-', '+',
/* 0x58 */ '\n', GRUB_TERM_KEY_END,
/* 0x5a */ GRUB_TERM_KEY_DOWN, GRUB_TERM_KEY_NPAGE,
/* 0x5c */ GRUB_TERM_KEY_LEFT, GRUB_TERM_KEY_CENTER,
/* 0x5e */ GRUB_TERM_KEY_RIGHT, GRUB_TERM_KEY_HOME,
/* 0x60 */ GRUB_TERM_KEY_UP, GRUB_TERM_KEY_PPAGE,
/* 0x62 */ GRUB_TERM_KEY_INSERT, GRUB_TERM_KEY_DC,
/* 0x64 */ '\\'
},
.keyboard_map_shift = {
/* Keyboard errors. Handled by driver. */
/* 0x00 */ 0, 0, 0, 0,
/* 0x04 */ 'A', 'B', 'C', 'D',
/* 0x08 */ 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L',
/* 0x10 */ 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T',
/* 0x18 */ 'U', 'V', 'W', 'X', 'Y', 'Z', '!', '@',
/* 0x20 */ '#', '$', '%', '^', '&', '*', '(', ')',
/* 0x28 */ '\n' | GRUB_TERM_SHIFT, GRUB_TERM_ESC | GRUB_TERM_SHIFT,
/* 0x2a */ GRUB_TERM_BACKSPACE | GRUB_TERM_SHIFT, GRUB_TERM_TAB | GRUB_TERM_SHIFT,
/* 0x2c */ ' ' | GRUB_TERM_SHIFT, '_', '+', '{',
/* According to usage table 0x31 should be mapped to '/'
but testing with real keyboard shows that 0x32 is remapped to '/'.
Map 0x31 to 0.
*/
/* 0x30 */ '}', 0, '|', ':', '"', '~', '<', '>',
/* 0x39 is CapsLock. Handled by driver. */
/* 0x38 */ '?', 0,
/* 0x3a */ GRUB_TERM_KEY_F1 | GRUB_TERM_SHIFT,
/* 0x3b */ GRUB_TERM_KEY_F2 | GRUB_TERM_SHIFT,
/* 0x3c */ GRUB_TERM_KEY_F3 | GRUB_TERM_SHIFT,
/* 0x3d */ GRUB_TERM_KEY_F4 | GRUB_TERM_SHIFT,
/* 0x3e */ GRUB_TERM_KEY_F5 | GRUB_TERM_SHIFT,
/* 0x3f */ GRUB_TERM_KEY_F6 | GRUB_TERM_SHIFT,
/* 0x40 */ GRUB_TERM_KEY_F7 | GRUB_TERM_SHIFT,
/* 0x41 */ GRUB_TERM_KEY_F8 | GRUB_TERM_SHIFT,
/* 0x42 */ GRUB_TERM_KEY_F9 | GRUB_TERM_SHIFT,
/* 0x43 */ GRUB_TERM_KEY_F10 | GRUB_TERM_SHIFT,
/* 0x44 */ GRUB_TERM_KEY_F11 | GRUB_TERM_SHIFT,
/* 0x45 */ GRUB_TERM_KEY_F12 | GRUB_TERM_SHIFT,
/* PrtScr and ScrollLock. Not handled yet. */
/* 0x46 */ 0, 0,
/* 0x48 is Pause. Not handled yet. */
/* 0x48 */ 0, GRUB_TERM_KEY_INSERT | GRUB_TERM_SHIFT,
/* 0x4a */ GRUB_TERM_KEY_HOME | GRUB_TERM_SHIFT,
/* 0x4b */ GRUB_TERM_KEY_PPAGE | GRUB_TERM_SHIFT,
/* 0x4c */ GRUB_TERM_KEY_DC | GRUB_TERM_SHIFT,
/* 0x4d */ GRUB_TERM_KEY_END | GRUB_TERM_SHIFT,
/* 0x4e */ GRUB_TERM_KEY_NPAGE | GRUB_TERM_SHIFT,
/* 0x4f */ GRUB_TERM_KEY_RIGHT | GRUB_TERM_SHIFT,
/* 0x50 */ GRUB_TERM_KEY_LEFT | GRUB_TERM_SHIFT,
/* 0x51 */ GRUB_TERM_KEY_DOWN | GRUB_TERM_SHIFT,
/* 0x53 is NumLock. Handled by driver. */
/* 0x52 */ GRUB_TERM_KEY_UP | GRUB_TERM_SHIFT, 0,
/* 0x54 */ '/', '*',
/* 0x56 */ '-', '+',
/* 0x58 */ '\n' | GRUB_TERM_SHIFT, '1', '2', '3', '4', '5','6', '7',
/* 0x60 */ '8', '9', '0', '.', '|'
}
};
static struct grub_keyboard_layout *grub_current_layout = &layout_us;
static int
map_key_core (int code, int status, int *alt_gr_consumed)
{
*alt_gr_consumed = 0;
if (code >= GRUB_KEYBOARD_LAYOUTS_ARRAY_SIZE)
return 0;
if (status & GRUB_TERM_STATUS_RALT)
{
if (status & (GRUB_TERM_STATUS_LSHIFT | GRUB_TERM_STATUS_RSHIFT))
{
if (grub_current_layout->keyboard_map_shift_l3[code])
{
*alt_gr_consumed = 1;
return grub_current_layout->keyboard_map_shift_l3[code];
}
}
else if (grub_current_layout->keyboard_map_l3[code])
{
*alt_gr_consumed = 1;
return grub_current_layout->keyboard_map_l3[code];
}
}
if (status & (GRUB_TERM_STATUS_LSHIFT | GRUB_TERM_STATUS_RSHIFT))
return grub_current_layout->keyboard_map_shift[code];
else
return grub_current_layout->keyboard_map[code];
}
unsigned
grub_term_map_key (grub_keyboard_key_t code, int status)
{
int alt_gr_consumed = 0;
int key;
if (code >= 0x59 && code <= 0x63 && (status & GRUB_TERM_STATUS_NUM))
{
if (status & (GRUB_TERM_STATUS_RSHIFT | GRUB_TERM_STATUS_LSHIFT))
status &= ~(GRUB_TERM_STATUS_RSHIFT | GRUB_TERM_STATUS_LSHIFT);
else
status |= GRUB_TERM_STATUS_RSHIFT;
}
key = map_key_core (code, status, &alt_gr_consumed);
if (key == 0 || key == GRUB_TERM_SHIFT) {
grub_printf ("Unknown key 0x%x detected\n", code);
return GRUB_TERM_NO_KEY;
}
if (status & GRUB_TERM_STATUS_CAPS)
{
if ((key >= 'a') && (key <= 'z'))
key += 'A' - 'a';
else if ((key >= 'A') && (key <= 'Z'))
key += 'a' - 'A';
}
if ((status & GRUB_TERM_STATUS_LALT) ||
((status & GRUB_TERM_STATUS_RALT) && !alt_gr_consumed))
key |= GRUB_TERM_ALT;
if (status & (GRUB_TERM_STATUS_LCTRL | GRUB_TERM_STATUS_RCTRL))
key |= GRUB_TERM_CTRL;
return key;
}
static grub_err_t
grub_cmd_keymap (struct grub_command *cmd __attribute__ ((unused)),
int argc, char *argv[])
{
char *filename;
grub_file_t file;
grub_uint32_t version;
grub_uint8_t magic[GRUB_KEYBOARD_LAYOUTS_FILEMAGIC_SIZE];
struct grub_keyboard_layout *newmap = NULL;
unsigned i;
if (argc < 1)
return grub_error (GRUB_ERR_BAD_ARGUMENT, "file or layout name required");
if (argv[0][0] != '(' && argv[0][0] != '/' && argv[0][0] != '+')
{
const char *prefix = grub_env_get ("prefix");
if (!prefix)
return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("variable `%s' isn't set"), "prefix");
filename = grub_xasprintf ("%s/layouts/%s.gkb", prefix, argv[0]);
if (!filename)
return grub_errno;
}
else
filename = argv[0];
file = grub_file_open (filename, GRUB_FILE_TYPE_KEYBOARD_LAYOUT);
if (! file)
goto fail;
if (grub_file_read (file, magic, sizeof (magic)) != sizeof (magic))
{
if (!grub_errno)
grub_error (GRUB_ERR_BAD_ARGUMENT, N_("premature end of file %s"),
filename);
goto fail;
}
if (grub_memcmp (magic, GRUB_KEYBOARD_LAYOUTS_FILEMAGIC,
GRUB_KEYBOARD_LAYOUTS_FILEMAGIC_SIZE) != 0)
{
grub_error (GRUB_ERR_BAD_ARGUMENT, "invalid magic");
goto fail;
}
if (grub_file_read (file, &version, sizeof (version)) != sizeof (version))
{
if (!grub_errno)
grub_error (GRUB_ERR_BAD_ARGUMENT, N_("premature end of file %s"),
filename);
goto fail;
}
if (version != grub_cpu_to_le32_compile_time (GRUB_KEYBOARD_LAYOUTS_VERSION))
{
grub_error (GRUB_ERR_BAD_ARGUMENT, "invalid version");
goto fail;
}
newmap = grub_malloc (sizeof (*newmap));
if (!newmap)
goto fail;
if (grub_file_read (file, newmap, sizeof (*newmap)) != sizeof (*newmap))
{
if (!grub_errno)
grub_error (GRUB_ERR_BAD_ARGUMENT, N_("premature end of file %s"),
filename);
goto fail;
}
for (i = 0; i < ARRAY_SIZE (newmap->keyboard_map); i++)
newmap->keyboard_map[i] = grub_le_to_cpu32(newmap->keyboard_map[i]);
for (i = 0; i < ARRAY_SIZE (newmap->keyboard_map_shift); i++)
newmap->keyboard_map_shift[i]
= grub_le_to_cpu32(newmap->keyboard_map_shift[i]);
for (i = 0; i < ARRAY_SIZE (newmap->keyboard_map_l3); i++)
newmap->keyboard_map_l3[i]
= grub_le_to_cpu32(newmap->keyboard_map_l3[i]);
for (i = 0; i < ARRAY_SIZE (newmap->keyboard_map_shift_l3); i++)
newmap->keyboard_map_shift_l3[i]
= grub_le_to_cpu32(newmap->keyboard_map_shift_l3[i]);
grub_current_layout = newmap;
return GRUB_ERR_NONE;
fail:
if (filename != argv[0])
grub_free (filename);
grub_free (newmap);
if (file)
grub_file_close (file);
return grub_errno;
}
static grub_command_t cmd;
GRUB_MOD_INIT(keylayouts)
{
cmd = grub_register_command ("keymap", grub_cmd_keymap,
0, N_("Load a keyboard layout."));
}
GRUB_MOD_FINI(keylayouts)
{
grub_unregister_command (cmd);
}
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