[OpenWrt-Devel] [PATCH 01/16] scripts/om-fwupgradecfg-gen.sh: Generate sha256sum for uboot verification

[Sven Eckelmann]

From: Sven Eckelmann <sven.eckelmann at open-mesh.com>

Future Open Mesh u-boot versions are changing the check of the image files
(vmlinux, rootfs) from md5 to sha256. Having both in them should be enough
to ensure backward and forward compatibility.

Signed-off-by: Sven Eckelmann <sven.eckelmann at open-mesh.com>
---
 scripts/om-fwupgradecfg-gen.sh | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/scripts/om-fwupgradecfg-gen.sh b/scripts/om-fwupgradecfg-gen.sh
index fab1582..e208e6d 100644
--- a/scripts/om-fwupgradecfg-gen.sh
+++ b/scripts/om-fwupgradecfg-gen.sh
@@ -42,6 +42,7 @@ CHECK_BS=65536
 
 KERNEL_SIZE=$(stat -c%s "$KERNEL_PATH")
 KERNEL_MD5=$(md5=$(md5sum $KERNEL_PATH); echo ${md5%% *})
+KERNEL_SHA256=$(openssl dgst -sha256 $KERNEL_PATH | awk '{print $2}')
 KERNEL_PART_SIZE=$(size=$(($KERNEL_SIZE / $FLASH_BS)); [ $(($size * $FLASH_BS)) -lt $KERNEL_SIZE ] && size=$(($size + 1)); echo $(($size * $FLASH_BS / 1024)))
 
 ROOTFS_FLASH_ADDR=$(addr=$(($KERNEL_FLASH_ADDR + ($KERNEL_PART_SIZE * 1024))); printf "0x%x" $addr)
@@ -49,6 +50,7 @@ ROOTFS_SIZE=$(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 ${md5%% *})
+ROOTFS_SHA256_FULL=$(openssl dgst -sha256 $ROOTFS_PATH | awk '{print $2}')
 ROOTFS_CHECK_SIZE=$(printf '0x%x' $(($ROOTFS_CHECK_BLOCKS * $CHECK_BS)))
 ROOTFS_PART_SIZE=$(($MAX_PART_SIZE - $KERNEL_PART_SIZE))
 
@@ -57,6 +59,7 @@ cat << EOF > $CFG_OUT
 filename=kernel
 md5sum=$KERNEL_MD5
 filemd5sum=$KERNEL_MD5
+filesha256sum=$KERNEL_SHA256
 flashaddr=$KERNEL_FLASH_ADDR
 checksize=0x0
 cmd_success=setenv bootseq 1,2; setenv kernel_size_1 $KERNEL_PART_SIZE; saveenv
@@ -66,6 +69,7 @@ cmd_fail=reset
 filename=rootfs
 md5sum=$ROOTFS_MD5
 filemd5sum=$ROOTFS_MD5_FULL
+filesha256sum=$ROOTFS_SHA256_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
-- 
2.8.0.rc3
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