sshcode/sshcode_test.go at master · morristech/sshcode · GitHub

Repository navigation

History

320 lines (262 loc) · 7.57 KB

Raw

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

215

216

217

218

219

220

221

222

223

224

225

226

227

228

229

230

231

232

233

234

235

236

237

238

239

240

241

242

243

244

245

246

247

248

249

250

251

252

253

254

255

256

257

258

259

260

261

262

263

264

265

266

267

268

269

270

271

272

273

274

275

276

277

278

279

280

281

282

283

284

285

286

287

288

289

290

291

292

293

294

295

296

297

298

299

300

301

302

303

304

305

306

307

308

309

310

311

312

313

314

315

316

317

318

319

320

package main

import (

"context"

"fmt"

"io"

"net"

"net/http"

"os"

"os/exec"

"path/filepath"

"strconv"

"sync"

"testing"

"time"

"github.com/stretchr/testify/require"

"go.coder.com/retry"

"golang.org/x/crypto/ssh"

)

func TestSSHCode(t *testing.T) {

// Avoid opening a browser window.

err := os.Unsetenv("DISPLAY")

require.NoError(t, err)

sshPort, err := randomPort()

require.NoError(t, err)

// start up our jank ssh server

defer trassh(t, sshPort).Close()

localPort := randomPortExclude(t, sshPort)

require.NotEmpty(t, localPort)

remotePort := randomPortExclude(t, sshPort, localPort)

require.NotEmpty(t, remotePort)

var wg sync.WaitGroup

wg.Add(1)

go func() {

defer wg.Done()

err := sshCode("foo@127.0.0.1", "", options{

sshFlags: testSSHArgs(sshPort),

localPort: localPort,

remotePort: remotePort,

})

require.NoError(t, err)

}()

waitForSSHCode(t, localPort, time.Second*30)

waitForSSHCode(t, remotePort, time.Second*30)

// Typically we'd do an os.Stat call here but the os package doesn't expand '~'

out, err := exec.Command("sh", "-c", "stat "+codeServerPath).CombinedOutput()

require.NoError(t, err, "%s", out)

out, err = exec.Command("pkill", filepath.Base(codeServerPath)).CombinedOutput()

require.NoError(t, err, "%s", out)

wg.Wait()

}

// trassh is an incomplete, local, insecure ssh server

// used for the purpose of testing the implementation without

// requiring the user to have their own remote server.

func trassh(t *testing.T, port string) io.Closer {

private, err := ssh.ParsePrivateKey([]byte(fakeRSAKey))

require.NoError(t, err)

conf := &ssh.ServerConfig{

NoClientAuth: true,

}

conf.AddHostKey(private)

listener, err := net.Listen("tcp", net.JoinHostPort("127.0.0.1", port))

require.NoError(t, err)

go func() {

for {

func() {

conn, err := listener.Accept()

if err != nil {

return

}

defer conn.Close()

sshConn, chans, reqs, err := ssh.NewServerConn(conn, conf)

require.NoError(t, err)

go ssh.DiscardRequests(reqs)

for c := range chans {

switch c.ChannelType() {

case "direct-tcpip":

var req directTCPIPReq

err := ssh.Unmarshal(c.ExtraData(), &req)

if err != nil {

t.Logf("failed to unmarshal tcpip data: %v", err)

continue

}

ch, _, err := c.Accept()

if err != nil {

c.Reject(ssh.ConnectionFailed, fmt.Sprintf("unable to accept channel: %v", err))

continue

}

go handleDirectTCPIP(ch, &req, t)

case "session":

ch, inReqs, err := c.Accept()

if err != nil {

c.Reject(ssh.ConnectionFailed, fmt.Sprintf("unable to accept channel: %v", err))

continue

}

go handleSession(ch, inReqs, t)

default:

t.Logf("unsupported session type: %v\n", c.ChannelType())

c.Reject(ssh.UnknownChannelType, "unknown channel type")

}

sshConn.Wait()

}()

}

}()

return listener

}

func handleDirectTCPIP(ch ssh.Channel, req *directTCPIPReq, t *testing.T) {

defer ch.Close()

dstAddr := net.JoinHostPort(req.Host, strconv.Itoa(int(req.Port)))

conn, err := net.Dial("tcp", dstAddr)

if err != nil {

return

}

defer conn.Close()

var wg sync.WaitGroup

wg.Add(1)

go func() {

defer wg.Done()

defer ch.Close()

io.Copy(ch, conn)

}()

wg.Add(1)

go func() {

defer wg.Done()

defer conn.Close()

io.Copy(conn, ch)

}()

wg.Wait()

}

// execReq describes an exec payload.

type execReq struct {

Command string

}

// directTCPIPReq describes the extra data sent in a

// direct-tcpip request containing the host/port for the ssh server.

type directTCPIPReq struct {

Host string

Port uint32

Orig string

OrigPort uint32

}

// exitStatus describes an 'exit-status' message

// returned after a request.

type exitStatus struct {

Status uint32

}

func handleSession(ch ssh.Channel, in <-chan *ssh.Request, t *testing.T) {

defer ch.Close()

for req := range in {

if req.WantReply {

req.Reply(true, nil)

}

// TODO support the rest of the types e.g. env, pty, etc.

// Right now they aren't necessary for the tests.

if req.Type != "exec" {

t.Logf("Unsupported session type %v, only 'exec' is supported", req.Type)

continue

}

var exReq execReq

err := ssh.Unmarshal(req.Payload, &exReq)

if err != nil {

t.Logf("failed to unmarshal exec payload %s", req.Payload)

return

}

cmd := exec.Command("sh", "-c", exReq.Command)

stdin, err := cmd.StdinPipe()

require.NoError(t, err)

go func() {

defer stdin.Close()

io.Copy(stdin, ch)

}()

cmd.Stdout = ch

cmd.Stderr = ch.Stderr()

err = cmd.Run()

var exit exitStatus

if err != nil {

exErr, ok := err.(*exec.ExitError)

require.True(t, ok, "Not an exec.ExitError, was %T", err)

exit.Status = uint32(exErr.ExitCode())

}

_, err = ch.SendRequest("exit-status", false, ssh.Marshal(&exit))

if err != nil {

t.Logf("unable to send status: %v", err)

}

break

}

func waitForSSHCode(t *testing.T, port string, timeout time.Duration) {

var (

url = fmt.Sprintf("http://localhost:%v/", port)

client = &http.Client{

Timeout: time.Second,

}

)

ctx, cancel := context.WithTimeout(context.Background(), timeout)

defer cancel()

backoff := &retry.Backoff{

Floor: time.Second,

Ceil: time.Second,

}

for {

resp, err := client.Get(url)

if err == nil {

require.Equal(t, http.StatusOK, resp.StatusCode)

return

}

err = backoff.Wait(ctx)

require.NoError(t, err)

}

// fakeRSAKey isn't used for anything other than the trassh ssh

// server.

const fakeRSAKey = `-----BEGIN RSA PRIVATE KEY-----

MIIEpQIBAAKCAQEAsbbGAxPQeqti2OgdzuMgJGBAwXe/bFhQTPuk0bIvavkZwX/a

NhmXV0dhLino5KtjR8oEazLxOgnOkJ6mpwVEgUhNMZhD9jEHZ7at4DtBIwfxjHjv

nF+kJAt4xX4AZYbwIfLN9TsDGGhv4wPlB7mbwv+lhmPK+HsLbajO4n69k3s0WW94

LafJntx/98o9gL2R7hpbMxgUu8cSZjYakkRBQdab0xUuTiceq0HfAOBCQpEw0meF

cmhMeeu7H5UwKGj573pBxON0G1SJgipkcs4TD2rZ9wjc29gDJjHjf3Ko/JzX1WFL

db21fzqRGWelgCHCUsIvUBeExk4jM1d63JrmFQIDAQABAoIBAQCdc9OSjG6tEMYe

aeFnGQK0V/dnskIOq1xSKK7J/7ZVb+iq8S0Tu67D7IEklos6dsMaqtkpZVQm2OOE

bJw45MjiRn3mUAL+0EfAUzFQtw8qC3Kuw8N/55kVOnjBeba+PUTqvyZNfQBsErP3

Dc9Q/dkMdtZf8HC3oMTqXqMWN7adQBQRBspUBkLQeSemYsUm2cc+YSnCwKel98uN

EuDJaTZwutxTUF1FBoXlejYlVKcldk1w5HtKkjGdW+mbo2xUpu8W0620Rs/fXNpU

+guAlpB1/Wx5foZqZx33Ul8HINfDre/uqHwCd+ucDIyV7TfIh9JV5w3iRLa0QCz0

kFe/GsEtAoGBAODRa1GwfyK+gcgxF2qwfsxF3I+DQhqWFiCA0o5kO2fpiUR3rDQj

XhBoPxr/qYBSBtGErHIiB7WFeQ6GjVTEgY/cEkIIh1tY95UWQ3/oIZWW498dQGRh

SUGXm3lMrSsVCyXxNexSH5yTrRzyZ2u4mZupMeyACoGRGkNTVppOU4XbAoGBAMpc

1ifX3kr5m8CXa6mI+NWFAQlhW0Ak0hjhM/WDzMrSimYxLLSkaKyUSHnFP/8V4asA

tV173lVut2Cjv5v5FcrOnI33Li2IcNlOzCRiLHzZ43HXckcoQDcU8iKTBq1a0Dx1

eXr2rs+a/2pTy7IMsxyJVCSP6IDBI9+2iW+Cxh7PAoGBAMOa0hJAS02yjX7d367v

I1OeETo4jQJOxa/ABfLoGJvfoJQWv5iZkRUbbpSSDytbsx0Gn3eqTiTMnbhar4sq

ckP1yVj0zLhY3wkzVsVp9haOM3ODouvzjWZpf1d5tE2AwLNhfHZCOcjk4EEIU51w

/w1ll89a1ElJM52SXA5jyd3zAoGBAKGtpKi2rvMGFKu+DxWnyu+FUXu2HhrUkEuy

ejn5MMEHj+3v8gDtrnfcDT/FGclrKR7f9QeYtN1bFQYQLkGmtAOSKcC/MVTNwyPL

8gxLp7GkwDSvZq11ekDH6mE3SMluWhtD3Ggi+S4Db3f7NS6vONde3SxNEfz00v2l

MI84U6Q/AoGAVTZGT5weqRTJSqnri6Noz+5j/73QMf/QiZDgHMMCF0giC2mxqOgR

QF6+cxHQe0sbMQ/xJU5RYhgnqSa2TjLMju4N2nQ9i/HqI/3p0CPwjFsZWlXmWEK9

5kdld52W7Bu2vQuFbg2Oy7aPhnI+1CqlubOFRgMe4AJND2t9SMTV+rc=

-----END RSA PRIVATE KEY-----

func testSSHArgs(port string) string {

return "-o StrictHostKeyChecking=no -p " + port

}

func randomPortExclude(t *testing.T, exludedPorts ...string) string {

valid := func(port string) bool {

for _, exPort := range exludedPorts {

if exPort == port {

return false

}

return true

}

maxTries := 10

for i := 0; i < maxTries; i++ {

port, err := randomPort()

require.NoError(t, err)

if valid(port) {

return port

}

return ""

}

sshcode/sshcode_test.go at master · morristech/sshcode · GitHub

Repository navigation

Expand file tree

Breadcrumbs

sshcode_test.go

Latest commit

History

Breadcrumbs

sshcode_test.go

File metadata and controls