Imports github.com/mitchellh/packer/packer github.com/mitchellh/packer/template/interpolate github.com/mitchellh/go-fs/fat github.com/mitchellh/go-fs github.com/mitchellh/multistep Standard library imports bufio bytes encoding/hex errors fmt io io/ioutil log math/rand net net/http net/url os path/filepath runtime strings time hash crypto/sha512 crypto/sha256 crypto/sha1 crypto/md5