[OpenWrt-Devel] [PATCH] scripts/om-fwupgradecfg-gen.sh: Fix u-boot image md5sum check

[Sven Eckelmann]

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>
Cc: Marek Lindner <marek at open-mesh.com>
---
 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 1f899c9..ba6f9a09 100644
--- a/scripts/om-fwupgradecfg-gen.sh
+++ b/scripts/om-fwupgradecfg-gen.sh
@@ -54,6 +54,7 @@ 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))
 
@@ -61,6 +62,7 @@ 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 $KERNEL_PART_SIZE; saveenv
@@ -69,6 +71,7 @@ cmd_fail=reset
 [rootfs]
 filename=rootfs
 md5sum=$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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