| # $OpenBSD: agent-getpeereid.sh,v 1.9 2017/09/13 14:58:26 bluhm Exp $ |
| # Placed in the Public Domain. |
| |
| tid="disallow agent attach from other uid" |
| |
| UNPRIV=nobody |
| ASOCK=${OBJ}/agent |
| SSH_AUTH_SOCK=/nonexistent |
| |
| if config_defined HAVE_GETPEEREID HAVE_GETPEERUCRED HAVE_SO_PEERCRED ; then |
| : |
| else |
| echo "skipped (not supported on this platform)" |
| exit 0 |
| fi |
| case "x$SUDO" in |
| xsudo) sudo=1;; |
| xdoas) ;; |
| x) |
| echo "need SUDO to switch to uid $UNPRIV" |
| exit 0 ;; |
| *) |
| echo "unsupported $SUDO - "doas" and "sudo" are allowed" |
| exit 0 ;; |
| esac |
| |
| trace "start agent" |
| eval `${SSHAGENT} -s -a ${ASOCK}` > /dev/null |
| r=$? |
| if [ $r -ne 0 ]; then |
| fail "could not start ssh-agent: exit code $r" |
| else |
| chmod 644 ${SSH_AUTH_SOCK} |
| |
| ${SSHADD} -l > /dev/null 2>&1 |
| r=$? |
| if [ $r -ne 1 ]; then |
| fail "ssh-add failed with $r != 1" |
| fi |
| if test -z "$sudo" ; then |
| # doas |
| ${SUDO} -n -u ${UNPRIV} ${SSHADD} -l 2>/dev/null |
| else |
| # sudo |
| < /dev/null ${SUDO} -S -u ${UNPRIV} ${SSHADD} -l 2>/dev/null |
| fi |
| r=$? |
| if [ $r -lt 2 ]; then |
| fail "ssh-add did not fail for ${UNPRIV}: $r < 2" |
| fi |
| |
| trace "kill agent" |
| ${SSHAGENT} -k > /dev/null |
| fi |
| |
| rm -f ${OBJ}/agent |