| # $OpenBSD: forcecommand.sh,v 1.7 2023/11/01 02:08:38 dtucker Exp $ |
| # Placed in the Public Domain. |
| |
| tid="forced command" |
| |
| cp $OBJ/sshd_proxy $OBJ/sshd_proxy_bak |
| |
| authorized_keys() { |
| cmd=$1 |
| cp /dev/null $OBJ/authorized_keys_$USER |
| for t in ${SSH_KEYTYPES}; do |
| test -z "$cmd" || \ |
| printf "command=\"$cmd\" " >>$OBJ/authorized_keys_$USER |
| cat $OBJ/$t.pub >> $OBJ/authorized_keys_$USER |
| done |
| } |
| |
| trace "test config with sftp" |
| authorized_keys |
| rm -f $OBJ/ssh_proxy.tmp |
| echo "@get $OBJ/ssh_proxy $OBJ/ssh_proxy.tmp" | \ |
| ${SFTP} -S ${SSH} -b - -qF $OBJ/ssh_proxy somehost 2>/dev/null || \ |
| fail "sftp failed" |
| test -f "$OBJ/ssh_proxy.tmp" || fail "sftp did not download file" |
| rm -f $OBJ/ssh_proxy.tmp |
| |
| trace "forced command in key option" |
| authorized_keys true |
| ${SSH} -F $OBJ/ssh_proxy somehost false || fail "forced command in key option" |
| |
| authorized_keys false |
| cp $OBJ/sshd_proxy_bak $OBJ/sshd_proxy |
| echo "ForceCommand true" >> $OBJ/sshd_proxy |
| |
| trace "forced command in sshd_config overrides key option" |
| ${SSH} -F $OBJ/ssh_proxy somehost false || fail "forced command config" |
| |
| authorized_keys |
| cp $OBJ/sshd_proxy_bak $OBJ/sshd_proxy |
| echo "ForceCommand false" >> $OBJ/sshd_proxy |
| |
| trace "force command overriding subsystem" |
| echo "@get $OBJ/ssh_proxy $OBJ/ssh_proxy.tmp" | \ |
| ${SFTP} -S ${SSH} -F $OBJ/ssh_proxy -oLoglevel=quiet somehost && \ |
| fail "sftp succeeded" |
| |
| echo "Match User $USER" >> $OBJ/sshd_proxy |
| echo " ForceCommand true" >> $OBJ/sshd_proxy |
| |
| trace "forced command with match" |
| ${SSH} -F $OBJ/ssh_proxy somehost false || fail "forced command match" |
| |
| trace "force command in match overriding subsystem" |
| echo "@get $OBJ/ssh_proxy $OBJ/ssh_proxy.tmp" | \ |
| ${SFTP} -S ${SSH} -F $OBJ/ssh_proxy -oLoglevel=quiet somehost && \ |
| fail "sftp succeeded" |
| |
| trace "force command to sftpserver" |
| grep -vi subsystem $OBJ/sshd_proxy_bak > $OBJ/sshd_proxy |
| echo "Subsystem sftp /bin/false" >> $OBJ/sshd_proxy |
| echo "ForceCommand ${SFTPSERVER}" >> $OBJ/sshd_proxy |
| rm -f $OBJ/ssh_proxy.tmp |
| echo "@get $OBJ/ssh_proxy $OBJ/ssh_proxy.tmp" | \ |
| ${SFTP} -S ${SSH} -b - -qF $OBJ/ssh_proxy somehost 2>/dev/null || \ |
| fail "sftp failed" |
| test -f "$OBJ/ssh_proxy.tmp" || fail "sftp did not download file" |
| rm -f $OBJ/ssh_proxy.tmp |