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-rw-r--r--regress/keys-command.sh81
1 files changed, 81 insertions, 0 deletions
diff --git a/regress/keys-command.sh b/regress/keys-command.sh
new file mode 100644
index 0000000..33b6e7b
--- /dev/null
+++ b/regress/keys-command.sh
@@ -0,0 +1,81 @@
+# $OpenBSD: keys-command.sh,v 1.6 2019/07/25 08:48:11 dtucker Exp $
+# Placed in the Public Domain.
+
+tid="authorized keys from command"
+
+if [ -z "$SUDO" -a ! -w /var/run ]; then
+ echo "skipped (SUDO not set)"
+ echo "need SUDO to create file in /var/run, test won't work without"
+ exit 0
+fi
+
+rm -f $OBJ/keys-command-args
+
+touch $OBJ/keys-command-args
+chmod a+rw $OBJ/keys-command-args
+
+expected_key_text=`awk '{ print $2 }' < $OBJ/ssh-ed25519.pub`
+expected_key_fp=`$SSHKEYGEN -lf $OBJ/ssh-ed25519.pub | awk '{ print $2 }'`
+
+# Establish a AuthorizedKeysCommand in /var/run where it will have
+# acceptable directory permissions.
+KEY_COMMAND="/var/run/keycommand_${LOGNAME}.$$"
+trap "${SUDO} rm -f ${KEY_COMMAND}" 0
+cat << _EOF | $SUDO sh -c "rm -f '$KEY_COMMAND' ; cat > '$KEY_COMMAND'"
+#!/bin/sh
+echo args: "\$@" >> $OBJ/keys-command-args
+echo "$PATH" | grep -q mekmitasdigoat && exit 7
+test "x\$1" != "x${LOGNAME}" && exit 1
+if test $# -eq 6 ; then
+ test "x\$2" != "xblah" && exit 2
+ test "x\$3" != "x${expected_key_text}" && exit 3
+ test "x\$4" != "xssh-rsa" && exit 4
+ test "x\$5" != "x${expected_key_fp}" && exit 5
+ test "x\$6" != "xblah" && exit 6
+fi
+exec cat "$OBJ/authorized_keys_${LOGNAME}"
+_EOF
+$SUDO chmod 0755 "$KEY_COMMAND"
+
+if ! $OBJ/check-perm -m keys-command $KEY_COMMAND ; then
+ echo "skipping: $KEY_COMMAND is unsuitable as AuthorizedKeysCommand"
+ $SUDO rm -f $KEY_COMMAND
+ exit 0
+fi
+
+if [ -x $KEY_COMMAND ]; then
+ cp $OBJ/sshd_proxy $OBJ/sshd_proxy.bak
+
+ verbose "AuthorizedKeysCommand with arguments"
+ (
+ grep -vi AuthorizedKeysFile $OBJ/sshd_proxy.bak
+ echo AuthorizedKeysFile none
+ echo AuthorizedKeysCommand $KEY_COMMAND %u blah %k %t %f blah
+ echo AuthorizedKeysCommandUser ${LOGNAME}
+ ) > $OBJ/sshd_proxy
+
+ # Ensure that $PATH is sanitised in sshd
+ env PATH=$PATH:/sbin/mekmitasdigoat \
+ ${SSH} -F $OBJ/ssh_proxy somehost true
+ if [ $? -ne 0 ]; then
+ fail "connect failed"
+ fi
+
+ verbose "AuthorizedKeysCommand without arguments"
+ # Check legacy behavior of no-args resulting in username being passed.
+ (
+ grep -vi AuthorizedKeysFile $OBJ/sshd_proxy.bak
+ echo AuthorizedKeysFile none
+ echo AuthorizedKeysCommand $KEY_COMMAND
+ echo AuthorizedKeysCommandUser ${LOGNAME}
+ ) > $OBJ/sshd_proxy
+
+ # Ensure that $PATH is sanitised in sshd
+ env PATH=$PATH:/sbin/mekmitasdigoat \
+ ${SSH} -F $OBJ/ssh_proxy somehost true
+ if [ $? -ne 0 ]; then
+ fail "connect failed"
+ fi
+else
+ echo "SKIPPED: $KEY_COMMAND not executable (/var/run mounted noexec?)"
+fi