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01fips: Properly creating path to .hmac of kernel based on BOOT_IMAGE #343

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merged 1 commit into from Jan 2, 2018
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01fips: Properly creating path to .hmac of kernel based on BOOT_IMAGE #343

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20 changes: 15 additions & 5 deletions modules.d/01fips/fips.sh
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Expand Up @@ -110,18 +110,28 @@ do_fips()
do_rhevh_check /run/initramfs/live/isolinux/vmlinuz0 || return 1
else
BOOT_IMAGE="$(getarg BOOT_IMAGE)"
if ! [ -e "/boot/${BOOT_IMAGE}" ]; then
BOOT_IMAGE_NAME="${BOOT_IMAGE##*/}"
BOOT_IMAGE_PATH="${BOOT_IMAGE%${BOOT_IMAGE_NAME}}"

if [ -z "$BOOT_IMAGE_NAME" ]; then
BOOT_IMAGE_NAME="vmlinuz-${KERNEL}"
elif ! [ -e "/boot/${BOOT_IMAGE_PATH}/${BOOT_IMAGE}" ]; then
#if /boot is not a separate partition BOOT_IMAGE might start with /boot
BOOT_IMAGE=${BOOT_IMAGE#"/boot"}
[ -e "/boot/${BOOT_IMAGE}" ] || BOOT_IMAGE="vmlinuz-${KERNEL}"
BOOT_IMAGE_PATH=${BOOT_IMAGE_PATH#"/boot"}
#on some achitectures BOOT_IMAGE does not contain path to kernel
#so if we can't find anything, let's treat it in the same way as if it was empty
if ! [ -e "/boot/${BOOT_IMAGE_PATH}/${BOOT_IMAGE_NAME}" ]; then
BOOT_IMAGE_NAME="vmlinuz-${KERNEL}"
BOOT_IMAGE_PATH=""
fi
fi

BOOT_IMAGE_HMAC="/boot/${BOOT_IMAGE%/*}/.${BOOT_IMAGE##*/}.hmac"

BOOT_IMAGE_HMAC="/boot/${BOOT_IMAGE_PATH}.${BOOT_IMAGE_NAME}.hmac"
if ! [ -e "${BOOT_IMAGE_HMAC}" ]; then
warn "${BOOT_IMAGE_HMAC} does not exist"
return 1
fi

sha512hmac -c "${BOOT_IMAGE_HMAC}" || return 1
fi

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