[U-Boot] [PATCH 1/4] bootm: allow to disable legacy image format
Heiko Schocher
hs at denx.de
Thu May 8 13:05:15 CEST 2014
Disabling legacy image format is useful when using
signed FIT images with required signature check.
Use CONFIG_DISABLE_IMAGE_FORMAT_LEGACY in the board
config file.
Signed-off-by: Heiko Schocher <hs at denx.de>
Cc: Simon Glass <sjg at chromium.org>
Cc: Lars Steubesand <lars.steubesand at philips.com>
Cc: Mike Pearce <mike at kaew.be>
Cc: Wolfgang Denk <wd at denx.de>
---
README | 5 +++++
common/cmd_bootm.c | 14 ++++++++++++++
common/cmd_disk.c | 4 ++++
common/cmd_fdc.c | 4 ++++
common/cmd_fpga.c | 2 ++
common/cmd_nand.c | 4 ++++
common/cmd_source.c | 4 ++++
common/cmd_ximg.c | 7 ++++++-
common/image-fdt.c | 10 ++++++++--
common/image.c | 23 ++++++++++++++++-------
doc/uImage.FIT/signature.txt | 3 +++
include/image.h | 2 ++
12 files changed, 72 insertions(+), 10 deletions(-)
diff --git a/README b/README
index b973344..b1f0ea3 100644
--- a/README
+++ b/README
@@ -3152,6 +3152,11 @@ FIT uImage format:
using a hash signed and verified using RSA. See
doc/uImage.FIT/signature.txt for more details.
+ CONFIG_DISABLE_IMAGE_FORMAT_LEGACY
+ WARNING: When relying on signed FIT images with required
+ signature check the legacy image format should be disabled by
+ using this define.
+
- Standalone program support:
CONFIG_STANDALONE_LOAD_ADDR
diff --git a/common/cmd_bootm.c b/common/cmd_bootm.c
index c243a5b..69b86ee 100644
--- a/common/cmd_bootm.c
+++ b/common/cmd_bootm.c
@@ -233,6 +233,7 @@ static int bootm_find_os(cmd_tbl_t *cmdtp, int flag, int argc,
/* get image parameters */
switch (genimg_get_format(os_hdr)) {
+#if !defined(CONFIG_DISABLE_IMAGE_FORMAT_LEGACY)
case IMAGE_FORMAT_LEGACY:
images.os.type = image_get_type(os_hdr);
images.os.comp = image_get_comp(os_hdr);
@@ -241,6 +242,7 @@ static int bootm_find_os(cmd_tbl_t *cmdtp, int flag, int argc,
images.os.end = image_get_image_end(os_hdr);
images.os.load = image_get_load(os_hdr);
break;
+#endif
#if defined(CONFIG_FIT)
case IMAGE_FORMAT_FIT:
if (fit_image_get_type(images.fit_hdr_os,
@@ -838,6 +840,7 @@ int bootm_maybe_autostart(cmd_tbl_t *cmdtp, const char *cmd)
return 0;
}
+#if !defined(CONFIG_DISABLE_IMAGE_FORMAT_LEGACY)
/**
* image_get_kernel - verify legacy format kernel image
* @img_addr: in RAM address of the legacy format image to be verified
@@ -888,6 +891,7 @@ static image_header_t *image_get_kernel(ulong img_addr, int verify)
}
return hdr;
}
+#endif
/**
* boot_get_kernel - find kernel image
@@ -905,7 +909,9 @@ static const void *boot_get_kernel(cmd_tbl_t *cmdtp, int flag, int argc,
char * const argv[], bootm_headers_t *images, ulong *os_data,
ulong *os_len)
{
+#if !defined(CONFIG_DISABLE_IMAGE_FORMAT_LEGACY)
image_header_t *hdr;
+#endif
ulong img_addr;
const void *buf;
#if defined(CONFIG_FIT)
@@ -943,6 +949,7 @@ static const void *boot_get_kernel(cmd_tbl_t *cmdtp, int flag, int argc,
*os_data = *os_len = 0;
buf = map_sysmem(img_addr, 0);
switch (genimg_get_format(buf)) {
+#if !defined(CONFIG_DISABLE_IMAGE_FORMAT_LEGACY)
case IMAGE_FORMAT_LEGACY:
printf("## Booting kernel from Legacy Image at %08lx ...\n",
img_addr);
@@ -985,6 +992,7 @@ static const void *boot_get_kernel(cmd_tbl_t *cmdtp, int flag, int argc,
images->legacy_hdr_valid = 1;
bootstage_mark(BOOTSTAGE_ID_DECOMP_IMAGE);
break;
+#endif
#if defined(CONFIG_FIT)
case IMAGE_FORMAT_FIT:
os_noffset = fit_image_load(images, FIT_KERNEL_PROP,
@@ -1114,6 +1122,7 @@ static int image_info(ulong addr)
printf("\n## Checking Image at %08lx ...\n", addr);
switch (genimg_get_format(hdr)) {
+#if !defined(CONFIG_DISABLE_IMAGE_FORMAT_LEGACY)
case IMAGE_FORMAT_LEGACY:
puts(" Legacy image found\n");
if (!image_check_magic(hdr)) {
@@ -1135,6 +1144,7 @@ static int image_info(ulong addr)
}
puts("OK\n");
return 0;
+#endif
#if defined(CONFIG_FIT)
case IMAGE_FORMAT_FIT:
puts(" FIT image found\n");
@@ -1194,6 +1204,7 @@ static int do_imls_nor(void)
goto next_sector;
switch (genimg_get_format(hdr)) {
+#if !defined(CONFIG_DISABLE_IMAGE_FORMAT_LEGACY)
case IMAGE_FORMAT_LEGACY:
if (!image_check_hcrc(hdr))
goto next_sector;
@@ -1208,6 +1219,7 @@ static int do_imls_nor(void)
puts("OK\n");
}
break;
+#endif
#if defined(CONFIG_FIT)
case IMAGE_FORMAT_FIT:
if (!fit_check_format(hdr))
@@ -1342,12 +1354,14 @@ static int do_imls_nand(void)
}
switch (genimg_get_format(buffer)) {
+#if !defined(CONFIG_DISABLE_IMAGE_FORMAT_LEGACY)
case IMAGE_FORMAT_LEGACY:
header = (const image_header_t *)buffer;
len = image_get_image_size(header);
nand_imls_legacyimage(nand, nand_dev, off, len);
break;
+#endif
#if defined(CONFIG_FIT)
case IMAGE_FORMAT_FIT:
len = fit_get_size(buffer);
diff --git a/common/cmd_disk.c b/common/cmd_disk.c
index 3e457f6..9b1ba7f 100644
--- a/common/cmd_disk.c
+++ b/common/cmd_disk.c
@@ -17,7 +17,9 @@ int common_diskboot(cmd_tbl_t *cmdtp, const char *intf, int argc,
ulong addr = CONFIG_SYS_LOAD_ADDR;
ulong cnt;
disk_partition_t info;
+#if !defined(CONFIG_DISABLE_IMAGE_FORMAT_LEGACY)
image_header_t *hdr;
+#endif
block_dev_desc_t *dev_desc;
#if defined(CONFIG_FIT)
@@ -62,6 +64,7 @@ int common_diskboot(cmd_tbl_t *cmdtp, const char *intf, int argc,
bootstage_mark(BOOTSTAGE_ID_IDE_PART_READ);
switch (genimg_get_format((void *) addr)) {
+#if !defined(CONFIG_DISABLE_IMAGE_FORMAT_LEGACY)
case IMAGE_FORMAT_LEGACY:
hdr = (image_header_t *) addr;
@@ -78,6 +81,7 @@ int common_diskboot(cmd_tbl_t *cmdtp, const char *intf, int argc,
cnt = image_get_image_size(hdr);
break;
+#endif
#if defined(CONFIG_FIT)
case IMAGE_FORMAT_FIT:
fit_hdr = (const void *) addr;
diff --git a/common/cmd_fdc.c b/common/cmd_fdc.c
index 1cfb656..409a216 100644
--- a/common/cmd_fdc.c
+++ b/common/cmd_fdc.c
@@ -635,7 +635,9 @@ int do_fdcboot (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
FD_GEO_STRUCT *pFG = (FD_GEO_STRUCT *)floppy_type;
FDC_COMMAND_STRUCT *pCMD = &cmd;
unsigned long addr,imsize;
+#if !defined(CONFIG_DISABLE_IMAGE_FORMAT_LEGACY)
image_header_t *hdr; /* used for fdc boot */
+#endif
unsigned char boot_drive;
int i,nrofblk;
#if defined(CONFIG_FIT)
@@ -689,12 +691,14 @@ int do_fdcboot (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
}
switch (genimg_get_format ((void *)addr)) {
+#if !defined(CONFIG_DISABLE_IMAGE_FORMAT_LEGACY)
case IMAGE_FORMAT_LEGACY:
hdr = (image_header_t *)addr;
image_print_contents (hdr);
imsize = image_get_image_size (hdr);
break;
+#endif
#if defined(CONFIG_FIT)
case IMAGE_FORMAT_FIT:
fit_hdr = (const void *)addr;
diff --git a/common/cmd_fpga.c b/common/cmd_fpga.c
index 010cd24..34eb3f0 100644
--- a/common/cmd_fpga.c
+++ b/common/cmd_fpga.c
@@ -155,6 +155,7 @@ int do_fpga(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
case FPGA_LOADMK:
switch (genimg_get_format(fpga_data)) {
+#if !defined(CONFIG_DISABLE_IMAGE_FORMAT_LEGACY)
case IMAGE_FORMAT_LEGACY:
{
image_header_t *hdr =
@@ -182,6 +183,7 @@ int do_fpga(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
rc = fpga_load(dev, (void *)data, data_size);
}
break;
+#endif
#if defined(CONFIG_FIT)
case IMAGE_FORMAT_FIT:
{
diff --git a/common/cmd_nand.c b/common/cmd_nand.c
index 04ab0f1..67d0796 100644
--- a/common/cmd_nand.c
+++ b/common/cmd_nand.c
@@ -904,7 +904,9 @@ static int nand_load_image(cmd_tbl_t *cmdtp, nand_info_t *nand,
int r;
char *s;
size_t cnt;
+#if !defined(CONFIG_DISABLE_IMAGE_FORMAT_LEGACY)
image_header_t *hdr;
+#endif
#if defined(CONFIG_FIT)
const void *fit_hdr = NULL;
#endif
@@ -930,6 +932,7 @@ static int nand_load_image(cmd_tbl_t *cmdtp, nand_info_t *nand,
bootstage_mark(BOOTSTAGE_ID_NAND_HDR_READ);
switch (genimg_get_format ((void *)addr)) {
+#if !defined(CONFIG_DISABLE_IMAGE_FORMAT_LEGACY)
case IMAGE_FORMAT_LEGACY:
hdr = (image_header_t *)addr;
@@ -938,6 +941,7 @@ static int nand_load_image(cmd_tbl_t *cmdtp, nand_info_t *nand,
cnt = image_get_image_size (hdr);
break;
+#endif
#if defined(CONFIG_FIT)
case IMAGE_FORMAT_FIT:
fit_hdr = (const void *)addr;
diff --git a/common/cmd_source.c b/common/cmd_source.c
index 54ffd16..51043a1 100644
--- a/common/cmd_source.c
+++ b/common/cmd_source.c
@@ -29,7 +29,9 @@ int
source (ulong addr, const char *fit_uname)
{
ulong len;
+#if !defined(CONFIG_DISABLE_IMAGE_FORMAT_LEGACY)
const image_header_t *hdr;
+#endif
ulong *data;
int verify;
void *buf;
@@ -44,6 +46,7 @@ source (ulong addr, const char *fit_uname)
buf = map_sysmem(addr, 0);
switch (genimg_get_format(buf)) {
+#if !defined(CONFIG_DISABLE_IMAGE_FORMAT_LEGACY)
case IMAGE_FORMAT_LEGACY:
hdr = buf;
@@ -84,6 +87,7 @@ source (ulong addr, const char *fit_uname)
*/
while (*data++);
break;
+#endif
#if defined(CONFIG_FIT)
case IMAGE_FORMAT_FIT:
if (fit_uname == NULL) {
diff --git a/common/cmd_ximg.c b/common/cmd_ximg.c
index 65a8319..527b1bd 100644
--- a/common/cmd_ximg.c
+++ b/common/cmd_ximg.c
@@ -32,10 +32,13 @@ do_imgextract(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
{
ulong addr = load_addr;
ulong dest = 0;
- ulong data, len, count;
+ ulong data, len;
int verify;
int part = 0;
+#if !defined(CONFIG_DISABLE_IMAGE_FORMAT_LEGACY)
+ ulong count;
image_header_t *hdr = NULL;
+#endif
#if defined(CONFIG_FIT)
const char *uname = NULL;
const void* fit_hdr;
@@ -64,6 +67,7 @@ do_imgextract(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
}
switch (genimg_get_format((void *)addr)) {
+#if !defined(CONFIG_DISABLE_IMAGE_FORMAT_LEGACY)
case IMAGE_FORMAT_LEGACY:
printf("## Copying part %d from legacy image "
@@ -114,6 +118,7 @@ do_imgextract(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
image_multi_getimg(hdr, part, &data, &len);
break;
+#endif
#if defined(CONFIG_FIT)
case IMAGE_FORMAT_FIT:
if (uname == NULL) {
diff --git a/common/image-fdt.c b/common/image-fdt.c
index a54a919..2a3262d 100644
--- a/common/image-fdt.c
+++ b/common/image-fdt.c
@@ -29,6 +29,7 @@ static void fdt_error(const char *msg)
puts(" - must RESET the board to recover.\n");
}
+#if !defined(CONFIG_DISABLE_IMAGE_FORMAT_LEGACY)
static const image_header_t *image_get_fdt(ulong fdt_addr)
{
const image_header_t *fdt_hdr = map_sysmem(fdt_addr, 0);
@@ -61,6 +62,7 @@ static const image_header_t *image_get_fdt(ulong fdt_addr)
}
return fdt_hdr;
}
+#endif
/**
* boot_fdt_add_mem_rsv_regions - Mark the memreserve sections as unusable
@@ -220,11 +222,13 @@ error:
int boot_get_fdt(int flag, int argc, char * const argv[], uint8_t arch,
bootm_headers_t *images, char **of_flat_tree, ulong *of_size)
{
+#if !defined(CONFIG_DISABLE_IMAGE_FORMAT_LEGACY)
const image_header_t *fdt_hdr;
+ ulong load, load_end;
+ ulong image_start, image_data, image_end;
+#endif
ulong fdt_addr;
char *fdt_blob = NULL;
- ulong image_start, image_data, image_end;
- ulong load, load_end;
void *buf;
#if defined(CONFIG_FIT)
const char *fit_uname_config = images->fit_uname_cfg;
@@ -298,6 +302,7 @@ int boot_get_fdt(int flag, int argc, char * const argv[], uint8_t arch,
*/
buf = map_sysmem(fdt_addr, 0);
switch (genimg_get_format(buf)) {
+#if !defined(CONFIG_DISABLE_IMAGE_FORMAT_LEGACY)
case IMAGE_FORMAT_LEGACY:
/* verify fdt_addr points to a valid image header */
printf("## Flattened Device Tree from Legacy Image at %08lx\n",
@@ -337,6 +342,7 @@ int boot_get_fdt(int flag, int argc, char * const argv[], uint8_t arch,
fdt_addr = load;
break;
+#endif
case IMAGE_FORMAT_FIT:
/*
* This case will catch both: new uImage format
diff --git a/common/image.c b/common/image.c
index 9c6bec5..ae7105e 100644
--- a/common/image.c
+++ b/common/image.c
@@ -44,8 +44,10 @@ extern int do_bdinfo(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]);
DECLARE_GLOBAL_DATA_PTR;
+#if !defined(CONFIG_DISABLE_IMAGE_FORMAT_LEGACY)
static const image_header_t *image_get_ramdisk(ulong rd_addr, uint8_t arch,
int verify);
+#endif
#else
#include "mkimage.h"
#include <u-boot/md5.h>
@@ -328,6 +330,7 @@ void image_print_contents(const void *ptr)
#ifndef USE_HOSTCC
+#if !defined(CONFIG_DISABLE_IMAGE_FORMAT_LEGACY)
/**
* image_get_ramdisk - get and verify ramdisk image
* @rd_addr: ramdisk image start address
@@ -389,6 +392,7 @@ static const image_header_t *image_get_ramdisk(ulong rd_addr, uint8_t arch,
return rd_hdr;
}
+#endif
#endif /* !USE_HOSTCC */
/*****************************************************************************/
@@ -652,20 +656,19 @@ int genimg_get_comp_id(const char *name)
*/
int genimg_get_format(const void *img_addr)
{
- ulong format = IMAGE_FORMAT_INVALID;
+#if !defined(CONFIG_DISABLE_IMAGE_FORMAT_LEGACY)
const image_header_t *hdr;
hdr = (const image_header_t *)img_addr;
if (image_check_magic(hdr))
- format = IMAGE_FORMAT_LEGACY;
+ return IMAGE_FORMAT_LEGACY;
+#endif
#if defined(CONFIG_FIT) || defined(CONFIG_OF_LIBFDT)
- else {
- if (fdt_check_header(img_addr) == 0)
- format = IMAGE_FORMAT_FIT;
- }
+ if (fdt_check_header(img_addr) == 0)
+ return IMAGE_FORMAT_FIT;
#endif
- return format;
+ return IMAGE_FORMAT_INVALID;
}
/**
@@ -707,12 +710,14 @@ ulong genimg_get_image(ulong img_addr)
/* get data size */
switch (genimg_get_format(buf)) {
+#if !defined(CONFIG_DISABLE_IMAGE_FORMAT_LEGACY)
case IMAGE_FORMAT_LEGACY:
d_size = image_get_data_size(buf);
debug(" Legacy format image found at 0x%08lx, "
"size 0x%08lx\n",
ram_addr, d_size);
break;
+#endif
#if defined(CONFIG_FIT)
case IMAGE_FORMAT_FIT:
d_size = fit_get_size(buf) - h_size;
@@ -788,7 +793,9 @@ int boot_get_ramdisk(int argc, char * const argv[], bootm_headers_t *images,
{
ulong rd_addr, rd_load;
ulong rd_data, rd_len;
+#if !defined(CONFIG_DISABLE_IMAGE_FORMAT_LEGACY)
const image_header_t *rd_hdr;
+#endif
void *buf;
#ifdef CONFIG_SUPPORT_RAW_INITRD
char *end;
@@ -871,6 +878,7 @@ int boot_get_ramdisk(int argc, char * const argv[], bootm_headers_t *images,
*/
buf = map_sysmem(rd_addr, 0);
switch (genimg_get_format(buf)) {
+#if !defined(CONFIG_DISABLE_IMAGE_FORMAT_LEGACY)
case IMAGE_FORMAT_LEGACY:
printf("## Loading init Ramdisk from Legacy "
"Image at %08lx ...\n", rd_addr);
@@ -886,6 +894,7 @@ int boot_get_ramdisk(int argc, char * const argv[], bootm_headers_t *images,
rd_len = image_get_data_size(rd_hdr);
rd_load = image_get_load(rd_hdr);
break;
+#endif
#if defined(CONFIG_FIT)
case IMAGE_FORMAT_FIT:
rd_noffset = fit_image_load(images, FIT_RAMDISK_PROP,
diff --git a/doc/uImage.FIT/signature.txt b/doc/uImage.FIT/signature.txt
index 9502037..4e32aa0 100644
--- a/doc/uImage.FIT/signature.txt
+++ b/doc/uImage.FIT/signature.txt
@@ -328,6 +328,9 @@ be enabled:
CONFIG_FIT_SIGNATURE - enable signing and verfication in FITs
CONFIG_RSA - enable RSA algorithm for signing
+WARNING: When relying on signed FIT images with required signature check
+the legacy image format should be disabled by using
+CONFIG_DISABLE_IMAGE_FORMAT_LEGACY
Testing
-------
diff --git a/include/image.h b/include/image.h
index 2508d7d..c46b1e0 100644
--- a/include/image.h
+++ b/include/image.h
@@ -410,7 +410,9 @@ enum fit_load_op {
#ifndef USE_HOSTCC
/* Image format types, returned by _get_format() routine */
#define IMAGE_FORMAT_INVALID 0x00
+#if !defined(CONFIG_DISABLE_IMAGE_FORMAT_LEGACY)
#define IMAGE_FORMAT_LEGACY 0x01 /* legacy image_header based format */
+#endif
#define IMAGE_FORMAT_FIT 0x02 /* new, libfdt based format */
int genimg_get_format(const void *img_addr);
--
1.8.3.1
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