Merge pull request #2789 from mboersma/base64-fix-again

Make base64 usage more portable in e2e setup

Author: k8s-ci-robot

hack/util.sh

@@ -60,7 +60,7 @@ capz::util::generate_ssh_key() {
         ssh-keygen -t rsa -b 2048 -f "${SSH_KEY_FILE}" -N '' 1>/dev/null
         AZURE_SSH_PUBLIC_KEY_FILE="${SSH_KEY_FILE}.pub"
     fi
-    AZURE_SSH_PUBLIC_KEY_B64=$(base64 "${AZURE_SSH_PUBLIC_KEY_FILE}" | tr -d '\r\n')
+    AZURE_SSH_PUBLIC_KEY_B64=$(base64 < "${AZURE_SSH_PUBLIC_KEY_FILE}" | tr -d '\r\n')
     export AZURE_SSH_PUBLIC_KEY_B64
     # Windows sets the public key via cloudbase-init which take the raw text as input
     AZURE_SSH_PUBLIC_KEY=$(tr -d '\r\n' < "${AZURE_SSH_PUBLIC_KEY_FILE}")