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-rw-r--r--regress/sshfp-connect.sh66
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diff --git a/regress/sshfp-connect.sh b/regress/sshfp-connect.sh
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+# $OpenBSD: sshfp-connect.sh,v 1.4 2021/09/01 00:50:27 dtucker Exp $
+# Placed in the Public Domain.
+
+# This test requires external setup and thus is skipped unless
+# TEST_SSH_SSHFP_DOMAIN is set. It requires:
+# 1) A DNSSEC-enabled domain, which TEST_SSH_SSHFP_DOMAIN points to.
+# 2) A DNSSEC-validating resolver such as unwind(8).
+# 3) The following SSHFP records with fingerprints from rsa_openssh.pub
+# in that domain that are expected to succeed:
+# sshtest: valid sha1 and sha256 fingerprints.
+# sshtest-sha{1,256}, : valid fingerprints for that type only.
+# and the following records that are expected to fail:
+# sshtest-bad: invalid sha1 fingerprint and good sha256 fingerprint
+# sshtest-sha{1,256}-bad: invalid fingerprints for that type only.
+#
+# sshtest IN SSHFP 1 1 99C79CC09F5F81069CC017CDF9552CFC94B3B929
+# sshtest IN SSHFP 1 2 E30D6B9EB7A4DE495324E4D5870B8220577993EA6AF417E8E4A4F1C5 BF01A9B6
+# sshtest-sha1 IN SSHFP 1 1 99C79CC09F5F81069CC017CDF9552CFC94B3B929
+# sshtest-sha256 IN SSHFP 1 2 E30D6B9EB7A4DE495324E4D5870B8220577993EA6AF417E8E4A4F1C5 BF01A9B6
+# sshtest-bad IN SSHFP 1 2 E30D6B9EB7A4DE495324E4D5870B8220577993EA6AF417E8E4A4F1C5 BF01A9B6
+# sshtest-bad IN SSHFP 1 1 99C79CC09F5F81069CC017CDF9552CFC94B3B928
+# sshtest-sha1-bad IN SSHFP 1 1 99D79CC09F5F81069CC017CDF9552CFC94B3B929
+# sshtest-sha256-bad IN SSHFP 1 2 E30D6B9EB7A4DE495324E4D5870B8220577993EA6AF417E8E4A4F1C5 BF01A9B5
+
+tid="sshfp connect"
+
+if ! $SSH -Q key-plain | grep ssh-rsa >/dev/null; then
+ skip "RSA keys not supported."
+elif [ -z "${TEST_SSH_SSHFP_DOMAIN}" ]; then
+ skip "TEST_SSH_SSHFP_DOMAIN not set."
+else
+ # Set RSA host key to match fingerprints above.
+ mv $OBJ/sshd_proxy $OBJ/sshd_proxy.orig
+ $SUDO cp $SRC/rsa_openssh.prv $OBJ/host.ssh-rsa
+ $SUDO chmod 600 $OBJ/host.ssh-rsa
+ sed -e "s|$OBJ/ssh-rsa|$OBJ/host.ssh-rsa|" \
+ $OBJ/sshd_proxy.orig > $OBJ/sshd_proxy
+
+ # Zero out known hosts and key aliases to force use of SSHFP records.
+ > $OBJ/known_hosts
+ mv $OBJ/ssh_proxy $OBJ/ssh_proxy.orig
+ sed -e "/HostKeyAlias.*localhost-with-alias/d" \
+ -e "/Hostname.*127.0.0.1/d" \
+ $OBJ/ssh_proxy.orig > $OBJ/ssh_proxy
+
+ for n in sshtest sshtest-sha1 sshtest-sha256; do
+ trace "sshfp connect $n good fingerprint"
+ host="${n}.dtucker.net"
+ opts="-F $OBJ/ssh_proxy -o VerifyHostKeyDNS=yes "
+ opts="$opts -o HostKeyAlgorithms=rsa-sha2-512,rsa-sha2-256"
+ host="${n}.${TEST_SSH_SSHFP_DOMAIN}"
+ SSH_CONNECTION=`${SSH} $opts $host 'echo $SSH_CONNECTION'`
+ if [ $? -ne 0 ]; then
+ fail "ssh sshfp connect failed"
+ fi
+ if [ "$SSH_CONNECTION" != "UNKNOWN 65535 UNKNOWN 65535" ]; then
+ fail "bad SSH_CONNECTION: $SSH_CONNECTION"
+ fi
+
+ trace "sshfp connect $n bad fingerprint"
+ host="${n}-bad.${TEST_SSH_SSHFP_DOMAIN}"
+ if ${SSH} $opts ${host} true; then
+ fail "sshfp-connect succeeded with bad SSHFP record"
+ fi
+ done
+fi