1 // Copyright (C) The Arvados Authors. All rights reserved.
3 // SPDX-License-Identifier: AGPL-3.0
17 "git.curoverse.com/arvados.git/lib/dispatchcloud/test"
18 "golang.org/x/crypto/ssh"
19 check "gopkg.in/check.v1"
22 // Gocheck boilerplate
23 func Test(t *testing.T) {
27 var _ = check.Suite(&ExecutorSuite{})
29 type testTarget struct {
33 func (*testTarget) VerifyHostKey(ssh.PublicKey, *ssh.Client) error {
37 // Address returns the wrapped SSHService's host, with the port
38 // stripped. This ensures the executor won't work until
39 // SetTargetPort() is called -- see (*testTarget)Port().
40 func (tt *testTarget) Address() string {
41 h, _, err := net.SplitHostPort(tt.SSHService.Address())
48 func (tt *testTarget) Port() string {
49 _, p, err := net.SplitHostPort(tt.SSHService.Address())
56 type mitmTarget struct {
60 func (*mitmTarget) VerifyHostKey(key ssh.PublicKey, client *ssh.Client) error {
61 return fmt.Errorf("host key failed verification: %#v", key)
64 type ExecutorSuite struct{}
66 func (s *ExecutorSuite) TestBadHostKey(c *check.C) {
67 _, hostpriv := test.LoadTestKey(c, "../test/sshkey_vm")
68 clientpub, clientpriv := test.LoadTestKey(c, "../test/sshkey_dispatch")
69 target := &mitmTarget{
70 SSHService: test.SSHService{
71 Exec: func(map[string]string, string, io.Reader, io.Writer, io.Writer) uint32 {
72 c.Error("Target Exec func called even though host key verification failed")
76 AuthorizedKeys: []ssh.PublicKey{clientpub},
81 c.Check(err, check.IsNil)
82 c.Logf("target address %q", target.Address())
86 exr.SetSigners(clientpriv)
88 _, _, err = exr.Execute(nil, "true", nil)
89 c.Check(err, check.ErrorMatches, "host key failed verification: .*")
92 func (s *ExecutorSuite) TestExecute(c *check.C) {
93 command := `foo 'bar' "baz"`
94 stdinData := "foobar\nbaz\n"
95 _, hostpriv := test.LoadTestKey(c, "../test/sshkey_vm")
96 clientpub, clientpriv := test.LoadTestKey(c, "../test/sshkey_dispatch")
97 for _, exitcode := range []int{0, 1, 2} {
98 target := &testTarget{
99 SSHService: test.SSHService{
100 Exec: func(env map[string]string, cmd string, stdin io.Reader, stdout, stderr io.Writer) uint32 {
101 c.Check(env["TESTVAR"], check.Equals, "test value")
102 c.Check(cmd, check.Equals, command)
103 var wg sync.WaitGroup
106 io.WriteString(stdout, "stdout\n")
110 io.WriteString(stderr, "stderr\n")
113 buf, err := ioutil.ReadAll(stdin)
115 c.Check(err, check.IsNil)
119 _, err = stdout.Write(buf)
120 c.Check(err, check.IsNil)
121 return uint32(exitcode)
124 AuthorizedKeys: []ssh.PublicKey{clientpub},
127 err := target.Start()
128 c.Check(err, check.IsNil)
129 c.Logf("target address %q", target.Address())
133 exr.SetSigners(clientpriv)
135 // Use the default target port (ssh). Execute will
136 // return a connection error or an authentication
137 // error, depending on whether the test host is
138 // running an SSH server.
139 _, _, err = exr.Execute(nil, command, nil)
140 c.Check(err, check.ErrorMatches, `.*(unable to authenticate|connection refused).*`)
142 // Use a bogus target port. Execute will return a
144 exr.SetTargetPort("0")
145 _, _, err = exr.Execute(nil, command, nil)
146 c.Check(err, check.ErrorMatches, `.*connection refused.*`)
148 // Use the test server's listening port.
149 exr.SetTargetPort(target.Port())
151 done := make(chan bool)
153 stdout, stderr, err := exr.Execute(map[string]string{"TESTVAR": "test value"}, command, bytes.NewBufferString(stdinData))
155 c.Check(err, check.IsNil)
157 c.Check(err, check.NotNil)
158 err, ok := err.(*ssh.ExitError)
159 c.Assert(ok, check.Equals, true)
160 c.Check(err.ExitStatus(), check.Equals, exitcode)
162 c.Check(stdout, check.DeepEquals, []byte("stdout\n"+stdinData))
163 c.Check(stderr, check.DeepEquals, []byte("stderr\n"))
167 timeout := time.NewTimer(time.Second)