verify ssh daemon version

tests/sshserver.pl

@@ -86,6 +86,30 @@ if ($username eq "root") {
     exit 1;
 }
 
+# Find out sshd version.
+my $tmpstr;
+my $ssh_daemon;
+my $ssh_ver_major;
+my $ssh_ver_minor;
+my $ssh_ver_patch;
+chomp($tmpstr = qx($sshd -V 2>&1 | grep OpenSSH));
+if ($tmpstr =~ /OpenSSH[_-](\d+)\.(\d+)(\.(\d+))*/) {
+    ($ssh_ver_major, $ssh_ver_minor, $ssh_ver_patch) = ($1, $2, $4);
+    $ssh_daemon = 'OpenSSH';
+}
+if ($verbose) {
+    print STDERR "ssh_daemon: $ssh_daemon\n";
+    print STDERR "ssh_ver_major: $ssh_ver_major\n";
+    print STDERR "ssh_ver_minor: $ssh_ver_minor\n";
+    print STDERR "ssh_ver_patch: $ssh_ver_patch\n";
+}
+
+# Verify minimum OpenSSH version.
+if ($ssh_daemon !~ /OpenSSH/) || (10 * $ssh_ver_major + $ssh_ver_minor < 37)
+    print "SCP and SFTP tests require OpenSSH 3.7 or later\n";
+    exit 1;
+}
+
 # Support for some options might have not been built into sshd.  On some
 # platforms specifying an unsupported option prevents sshd from starting.
 # Check here for possible unsupported options, avoiding its use in sshd.