install-twoliter: validate binary checksum on install

Makefile.toml

@@ -9,6 +9,8 @@ BUILDSYS_ROOT_DIR = "${CARGO_MAKE_WORKING_DIRECTORY}"
 # for example v0.1.0). For the git sourcecode installation method, this can be
 # any git rev, e.g. a tag, sha, or branch name.
 TWOLITER_VERSION = "v0.4.5"
+TWOLITER_SHA256_AARCH64 = "799103bcc00e1daf931e11eb58630ca7c4d93c14752c3f4dcf25594759e3c3e7"
+TWOLITER_SHA256_X86_64 = "b0cd35c0a1257fc98992821eb5ea7a96c021dba166ee2b9d04449b9206b3d941"
 
 # For binary installation, this is the GitHub repository that has binary release artifacts attached
 # to it, for example https://github.com/bottlerocket-os/twoliter. For git sourcecode installation,
@@ -271,7 +273,11 @@ if [ "${TWOLITER_REUSE_EXISTING_INSTALL}" = "true" ]; then
 fi
 
 if [ "${TWOLITER_ALLOW_BINARY_INSTALL}" = "true" ]; then
-   flags+=("--allow-binary-install")
+   if [ "${BUILDSYS_ARCH}" = "aarch64" ]; then
+      flags+=("--allow-binary-install" "${TWOLITER_SHA256_AARCH64}")
+   else
+      flags+=("--allow-binary-install" "${TWOLITER_SHA256_X86_64}")
+   fi
 fi
 
 if [ "${TWOLITER_ALLOW_SOURCE_INSTALL}" = "true" ]; then

tools/install-twoliter.sh

@@ -41,7 +41,8 @@ Usage: $0 -r GIT_REPO -v TWOLITER_VERSION -d INSTALL_DIR [-e REUSE_EXISTING] [-b
     -d, --directory               the directory to install twoliter into
     -e, --reuse-existing-install  we will skip installation if we find the correct version installed
     -b, --allow-binary-install    we will try to install a GitHub release-attached binary if the
-                                  host we are on is Linux.
+                                  host we are on is Linux. Takes an expected sha256 sum for the
+                                  binary as input.
     -s, --allow-from-source       we will install from source using cargo install pointed to a git
                                   repo and rev when binary install is either not allowed or not
                                   possible
@@ -96,7 +97,7 @@ while [[ $# -gt 0 ]]; do
         -e|--reuse-existing-install)
             reuse_existing="true" ;;
         -b|--allow-binary-install)
-            allow_bin="true" ;;
+            allow_bin="true"; shift; bin_checksum=$1 ;;
         -s|--allow-from-source)
             from_source="true" ;;
         -k|--skip-version-check)
@@ -143,6 +144,8 @@ if [ "${allow_bin}" = "true" ] ; then
       twoliter_target="${host_arch}-unknown-${host_kernel}-musl"
       cd "${workdir}"
       curl -sSL "${twoliter_release}/twoliter-${twoliter_target}.tar.xz" -o "twoliter.tar.xz"
+      echo "Checking binary checksum..."
+      sha256sum -c <<< "${bin_checksum} twoliter.tar.xz"
       tar xf twoliter.tar.xz
       mv "./twoliter-${twoliter_target}/twoliter" "${dir}"
       exit 0
@@ -177,4 +180,4 @@ fi
 if [ ! -x "${dir}/twoliter" ] ; then
    echo "Could not install twoliter ${version}" >&2
    exit 1
-fi
+fi