diff --git a/elements/ubuntu/root.d/10-cache-ubuntu-tarball b/elements/ubuntu/root.d/10-cache-ubuntu-tarball index 686fcf711..7b3ff1662 100755 --- a/elements/ubuntu/root.d/10-cache-ubuntu-tarball +++ b/elements/ubuntu/root.d/10-cache-ubuntu-tarball @@ -10,12 +10,17 @@ IMG_PATH=~/.cache/image-create CLOUD_IMAGES=${CLOUD_IMAGES:-http://cloud-images.ubuntu.com/} RELEASE=${RELEASE:-quantal} BASE_IMAGE_FILE=${BASE_IMAGE_FILE:-$RELEASE-server-cloudimg-$ARCH-root.tar.gz} +SHA256SUMS=${SHA256SUMS:-https://cloud-images.ubuntu.com/$RELEASE/current/SHA256SUMS} mkdir -p $IMG_PATH # TODO: don't cache -current forever. if [ ! -f $IMG_PATH/$BASE_IMAGE_FILE ] ; then echo "Fetching Base Image" wget $CLOUD_IMAGES/$RELEASE/current/$BASE_IMAGE_FILE -O $IMG_PATH/$BASE_IMAGE_FILE.tmp + wget $SHA256SUMS -O $IMG_PATH/SHA256SUMS + pushd $IMG_PATH + awk "/$BASE_IMAGE_FILE/ { print \$0 \".tmp\" }" SHA256SUMS | sha256sum --check - + popd mv $IMG_PATH/$BASE_IMAGE_FILE.tmp $IMG_PATH/$BASE_IMAGE_FILE fi # Extract the base image