[OpenWrt-Devel] [PATCH v2] scripts/om-fwupgradecfg-gen.sh: Fix u-boot image md5sum check
Sven Eckelmann
sven at open-mesh.com
Wed Sep 9 05:11:00 EDT 2015
The u-boot on Open Mesh devices checks the whole transfered image against a
md5sum. This is stored inside the option filemd5sum inside the
fwupgrade.cfg. The bootloader will not check it when this setting is
missing and could therefore write invalid images to the flash.
Signed-off-by: Sven Eckelmann <sven at open-mesh.com>
---
v2:
- rebased on top of r46832
scripts/om-fwupgradecfg-gen.sh | 3 +++
1 file changed, 3 insertions(+)
diff --git a/scripts/om-fwupgradecfg-gen.sh b/scripts/om-fwupgradecfg-gen.sh
index e132954..d385e5e 100644
--- a/scripts/om-fwupgradecfg-gen.sh
+++ b/scripts/om-fwupgradecfg-gen.sh
@@ -48,6 +48,7 @@ ROOTFS_FLASH_ADDR=$(addr=$(($KERNEL_FLASH_ADDR + ($KERNEL_PART_SIZE * 1024))); p
ROOTFS_SIZE=$(stat -c%s "$ROOTFS_PATH")
ROOTFS_CHECK_BLOCKS=$((($ROOTFS_SIZE / $CHECK_BS) - $MD5_SKIP_BLOCKS))
ROOTFS_MD5=$(md5=$(dd if=$ROOTFS_PATH bs=$CHECK_BS count=$ROOTFS_CHECK_BLOCKS 2>&- | md5sum); echo ${md5%% *})
+ROOTFS_MD5_FULL=$(md5=$(md5sum $ROOTFS_PATH); echo ${md5%% *})
ROOTFS_CHECK_SIZE=$(printf '0x%x' $(($ROOTFS_CHECK_BLOCKS * $CHECK_BS)))
ROOTFS_PART_SIZE=$(($MAX_PART_SIZE - $KERNEL_PART_SIZE))
@@ -55,6 +56,7 @@ cat << EOF > $CFG_OUT
[vmlinux]
filename=kernel
md5sum=$KERNEL_MD5
+filemd5sum=$KERNEL_MD5
flashaddr=$KERNEL_FLASH_ADDR
checksize=0x0
cmd_success=setenv bootseq 1,2; setenv kernel_size_1 $KERNEL_PART_SIZE; saveenv
@@ -63,6 +65,7 @@ cmd_fail=reset
[rootfs]
filename=rootfs
md5sum=$ROOTFS_MD5
+filemd5sum=$ROOTFS_MD5_FULL
flashaddr=$ROOTFS_FLASH_ADDR
checksize=$ROOTFS_CHECK_SIZE
cmd_success=setenv bootseq 1,2; setenv kernel_size_1 $KERNEL_PART_SIZE; setenv rootfs_size_1 $ROOTFS_PART_SIZE; saveenv
--
2.5.1
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