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|
package sshd
import (
"context"
"fmt"
"net/http"
"net/http/httptest"
"os"
"path"
"testing"
"time"
"github.com/stretchr/testify/require"
"golang.org/x/crypto/ssh"
"gitlab.com/gitlab-org/gitlab-shell/client/testserver"
"gitlab.com/gitlab-org/gitlab-shell/internal/config"
"gitlab.com/gitlab-org/gitlab-shell/internal/testhelper"
)
const (
serverUrl = "127.0.0.1:50000"
user = "git"
)
var (
correlationId = ""
)
func TestListenAndServe(t *testing.T) {
s := setupServer(t)
client, err := ssh.Dial("tcp", serverUrl, clientConfig(t))
require.NoError(t, err)
defer client.Close()
require.NoError(t, s.Shutdown())
verifyStatus(t, s, StatusOnShutdown)
holdSession(t, client)
_, err = ssh.Dial("tcp", serverUrl, clientConfig(t))
require.Equal(t, err.Error(), "dial tcp 127.0.0.1:50000: connect: connection refused")
client.Close()
verifyStatus(t, s, StatusClosed)
}
func TestListenAndServeRejectsPlainConnectionsWhenProxyProtocolEnabled(t *testing.T) {
s := setupServerWithProxyProtocolEnabled(t)
defer s.Shutdown()
client, err := ssh.Dial("tcp", serverUrl, clientConfig(t))
if client != nil {
client.Close()
}
require.Error(t, err, "Expected plain SSH request to be failed")
require.Equal(t, err.Error(), "ssh: handshake failed: EOF")
}
func TestCorrelationId(t *testing.T) {
setupServer(t)
client, err := ssh.Dial("tcp", serverUrl, clientConfig(t))
require.NoError(t, err)
defer client.Close()
holdSession(t, client)
previousCorrelationId := correlationId
client, err = ssh.Dial("tcp", serverUrl, clientConfig(t))
require.NoError(t, err)
defer client.Close()
holdSession(t, client)
require.NotEqual(t, previousCorrelationId, correlationId)
}
func TestReadinessProbe(t *testing.T) {
s := &Server{Config: &config.Config{Server: config.DefaultServerConfig}}
require.Equal(t, StatusStarting, s.getStatus())
mux := s.MonitoringServeMux()
req := httptest.NewRequest("GET", "/start", nil)
r := httptest.NewRecorder()
mux.ServeHTTP(r, req)
require.Equal(t, 503, r.Result().StatusCode)
s.changeStatus(StatusReady)
r = httptest.NewRecorder()
mux.ServeHTTP(r, req)
require.Equal(t, 200, r.Result().StatusCode)
s.changeStatus(StatusOnShutdown)
r = httptest.NewRecorder()
mux.ServeHTTP(r, req)
require.Equal(t, 503, r.Result().StatusCode)
}
func TestLivenessProbe(t *testing.T) {
s := &Server{Config: &config.Config{Server: config.DefaultServerConfig}}
mux := s.MonitoringServeMux()
req := httptest.NewRequest("GET", "/health", nil)
r := httptest.NewRecorder()
mux.ServeHTTP(r, req)
require.Equal(t, 200, r.Result().StatusCode)
}
func TestInvalidClientConfig(t *testing.T) {
setupServer(t)
cfg := clientConfig(t)
cfg.User = "unknown"
_, err := ssh.Dial("tcp", serverUrl, cfg)
require.Error(t, err)
}
func TestInvalidServerConfig(t *testing.T) {
s := &Server{Config: &config.Config{Server: config.ServerConfig{Listen: "invalid"}}}
err := s.ListenAndServe(context.Background())
require.Error(t, err)
require.Equal(t, "failed to listen for connection: listen tcp: address invalid: missing port in address", err.Error())
require.Nil(t, s.Shutdown())
}
func setupServer(t *testing.T) *Server {
t.Helper()
return setupServerWithConfig(t, nil)
}
func setupServerWithProxyProtocolEnabled(t *testing.T) *Server {
t.Helper()
return setupServerWithConfig(t, &config.Config{Server: config.ServerConfig{ProxyProtocol: true}})
}
func setupServerWithConfig(t *testing.T, cfg *config.Config) *Server {
t.Helper()
requests := []testserver.TestRequestHandler{
{
Path: "/api/v4/internal/authorized_keys",
Handler: func(w http.ResponseWriter, r *http.Request) {
correlationId = r.Header.Get("X-Request-Id")
require.NotEmpty(t, correlationId)
fmt.Fprint(w, `{"id": 1000, "key": "key"}`)
},
}, {
Path: "/api/v4/internal/discover",
Handler: func(w http.ResponseWriter, r *http.Request) {
require.Equal(t, correlationId, r.Header.Get("X-Request-Id"))
fmt.Fprint(w, `{"id": 1000, "name": "Test User", "username": "test-user"}`)
},
},
}
testhelper.PrepareTestRootDir(t)
url := testserver.StartSocketHttpServer(t, requests)
if cfg == nil {
cfg = &config.Config{}
}
// All things that don't need to be configurable in tests yet
cfg.GitlabUrl = url
cfg.RootDir = "/tmp"
cfg.User = user
cfg.Server.Listen = serverUrl
cfg.Server.ConcurrentSessionsLimit = 1
cfg.Server.HostKeyFiles = []string{path.Join(testhelper.TestRoot, "certs/valid/server.key")}
s, err := NewServer(cfg)
require.NoError(t, err)
go func() { require.NoError(t, s.ListenAndServe(context.Background())) }()
t.Cleanup(func() { s.Shutdown() })
verifyStatus(t, s, StatusReady)
return s
}
func clientConfig(t *testing.T) *ssh.ClientConfig {
keyRaw, err := os.ReadFile(path.Join(testhelper.TestRoot, "certs/valid/server_authorized_key"))
pKey, _, _, _, err := ssh.ParseAuthorizedKey(keyRaw)
require.NoError(t, err)
key, err := os.ReadFile(path.Join(testhelper.TestRoot, "certs/client/key.pem"))
require.NoError(t, err)
signer, err := ssh.ParsePrivateKey(key)
require.NoError(t, err)
return &ssh.ClientConfig{
User: user,
Auth: []ssh.AuthMethod{
ssh.PublicKeys(signer),
},
HostKeyCallback: ssh.FixedHostKey(pKey),
}
}
func holdSession(t *testing.T, c *ssh.Client) {
session, err := c.NewSession()
require.NoError(t, err)
defer session.Close()
output, err := session.Output("discover")
require.NoError(t, err)
require.Equal(t, "Welcome to GitLab, @test-user!\n", string(output))
}
func verifyStatus(t *testing.T, s *Server, st status) {
for i := 5; i < 500; i += 50 {
if s.getStatus() == st {
break
}
// Sleep incrementally ~2s in total
time.Sleep(time.Duration(i) * time.Millisecond)
}
require.Equal(t, st, s.getStatus())
}
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