http://nkuz2tpok7ctwd5ueer5bytj3bm42vp7lgjcsnznal3stotg6vyaakyd.onion/rbm_input_files.html
The build will fail with an
error if the file does not match the expected sha256 checksum. file_gpg_id If this option is set to 1, the file is checked for a gpg
signature. If it is set to an other non zero value, or an array
of non zero values, those are expected to be the valid gpg key
IDs. The gpg_wrapper , gpg_keyring , gpg_keyring_dir , gpg_bin , gpg_args options can be used to configure the gpg
check.