* guix/scripts/authenticate.scm (guix-authenticate): Add clauses for ("rsautl" "-sign" "-inkey" key) and ("rsautl" "-verify" "-inkey" _ "-pubin"). * tests/guix-authenticate.sh (hash): Add test using -sign and -verify in a pipeline.
* tests/guix-authenticate.sh: New file. * Makefile.am (SH_TESTS): Add it.