packer-cn/website/source/partials/builder/virtualbox/ovf/_Config-required.html.md

• checksum (string) - The checksum for the source_path file. The algorithm to use when computing the checksum can be optionally specified with checksum_type. When checksum_type is not set packer will guess the checksumming type based on checksum length. checksum can be also be a file or an URL, in which case checksum_type must be set to file; the go-getter will download it and use the first hash found.

• source_path (string) - The filepath or URL to an OVF or OVA file that acts as the source of this build.