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ssh_test.go
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ssh_test.go
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package vizzini_test
import (
"bytes"
"crypto/rand"
"encoding/json"
"fmt"
"io"
"net/http"
"os"
"os/exec"
"path"
"path/filepath"
"strings"
"syscall"
"time"
"github.com/kr/pty"
"github.com/onsi/gomega/gbytes"
"github.com/onsi/gomega/gexec"
"code.cloudfoundry.org/bbs/models"
ssh_routes "code.cloudfoundry.org/diego-ssh/routes"
. "code.cloudfoundry.org/vizzini/matchers"
. "github.com/onsi/ginkgo/v2"
. "github.com/onsi/gomega"
)
const userPrivateRSAKey = `-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----`
const userAuthorizedKey = ` ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAAA/C/hstPGznfdyUGdbatKgbWJYRTb8S8A7ehto1SukBzCKrR+Dw5Iy/qSIzi82xkOGjckEECa2B9fiACBY+fQQPvInCnU5iMUkJNZcrugJhnv6S9y8k3Ut7HT9YVlIxDpjxyxdrkkkmoPCAu0zSqUQuv6QlKBi2A7wZcfwmupOue11vhaPQ+KNULtJaiYNQoHsvO/hxe/wcKmHI4R0cWp/zibNqx5xz6eaao5qsrshr02mRxMumYCQohfM93/wL+oVyzLMSeaKxZtAglfMecjNcUn9Sk22Jq1bbvu8cLR9Gdg35XeHl5Gif03/JQsXbUpLeQd8nXKUjYk8uNAHQ==`
const hostPrivateRSAKey = `-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----`
const hostFingerprint = `9e:33:35:e0:fe:67:e5:c4:7e:90:53:72:c2:3f:a1:9c`
type sshTarget struct {
User string
Host string
Port string
}
var _ = Describe("SSH Tests", func() {
var (
password string
target sshTarget
lrp *models.DesiredLRP
user string
rootfs string
startTimeout time.Duration
gracePath string
sshdArgs []string
sshClientArgs []string
)
secureCommand := func(cmd string, args ...string) *exec.Cmd {
sshArgs := []string{}
sshArgs = append(sshArgs, sshClientArgs...)
sshArgs = append(sshArgs, args...)
return exec.Command(cmd, sshArgs...)
}
ssh := func(target sshTarget, args ...string) *exec.Cmd {
sshArgs := []string{
"-o", "User=" + target.User,
"-p", target.Port,
target.Host,
}
return secureCommand("ssh", append(sshArgs, args...)...)
}
sshInteractive := func(target sshTarget) *exec.Cmd {
return ssh(target,
"-t",
"-t", // double tap to force pty allocation
)
}
sshTunnelTo := func(target sshTarget, localport, remoteport int) *exec.Cmd {
return ssh(target,
"-N",
"-L", fmt.Sprintf("%d:127.0.0.1:%d", localport, remoteport),
)
}
scp := func(target sshTarget, args ...string) *exec.Cmd {
scpArgs := []string{
"-o", "User=" + target.User,
"-P", target.Port,
"-vvv",
}
return secureCommand("scp", append(scpArgs, args...)...)
}
sftp := func(target sshTarget, args ...string) *exec.Cmd {
sftpArgs := []string{
"-v",
"-P", target.Port,
"-o", "User=" + target.User,
sshHost,
}
return secureCommand("sftp", append(sftpArgs, args...)...)
}
BeforeEach(func() {
password = config.SSHPassword
target = sshTarget{
User: "diego:" + guid + "/0",
Port: sshPort,
Host: sshHost,
}
user = "vcap"
startTimeout = timeout
sshdArgs = append(sshdArgs,
"-hostKey="+hostPrivateRSAKey,
"-authorizedKey="+userAuthorizedKey,
"-inheritDaemonEnv",
)
sshClientArgs = []string{
"-o", "StrictHostKeyChecking=no",
"-o", "UserKnownHostsFile=/dev/null",
}
})
JustBeforeEach(func() {
sshRoutePayload, err := json.Marshal(ssh_routes.SSHRoute{
ContainerPort: 2222,
HostFingerprint: hostFingerprint,
PrivateKey: userPrivateRSAKey,
})
Expect(err).NotTo(HaveOccurred())
sshRouteJSON := json.RawMessage(sshRoutePayload)
routes := models.Routes{
ssh_routes.DIEGO_SSH: &sshRouteJSON,
}
lrp = &models.DesiredLRP{
ProcessGuid: guid,
PlacementTags: PlacementTags(),
Domain: domain,
Instances: 1,
EnvironmentVariables: []*models.EnvironmentVariable{{Name: "CUMBERBUND", Value: "cummerbund"}},
CachedDependencies: []*models.CachedDependency{
&models.CachedDependency{
Name: "grace",
From: config.GraceTarballURL,
To: "/tmp/grace",
CacheKey: "grace",
},
&models.CachedDependency{
Name: "lifecycle bundle",
From: config.FileServerAddress + "/v1/static/buildpack_app_lifecycle/buildpack_app_lifecycle.tgz",
To: "/tmp/lifecycle",
CacheKey: "lifecycle",
},
},
Action: models.WrapAction(models.Parallel(
&models.RunAction{
Path: "/tmp/lifecycle/diego-sshd",
Args: append([]string{
"-address=0.0.0.0:2222",
"-logLevel=debug",
}, sshdArgs...),
User: user,
},
&models.RunAction{
Path: gracePath,
User: user,
Env: []*models.EnvironmentVariable{{Name: "PORT", Value: "8888"}, {Name: "INSTANCE_INDEX", Value: "inconceivable!"}},
},
)),
Monitor: models.WrapAction(models.Parallel(
&models.RunAction{
Path: "/tmp/lifecycle/healthcheck",
Args: []string{"-port", "2222"},
User: user,
},
&models.RunAction{
Path: "/tmp/lifecycle/healthcheck",
Args: []string{"-port", "8888"},
User: user,
},
)),
RootFs: rootfs,
MemoryMb: 128,
DiskMb: 128,
Ports: []uint32{2222},
Routes: &routes,
MetricTags: map[string]*models.MetricTagValue{"source_id": {Static: guid}},
}
Expect(bbsClient.DesireLRP(logger, traceID, lrp)).To(Succeed())
Eventually(ActualGetter(logger, guid, 0), startTimeout).Should(BeActualLRPWithState(guid, 0, models.ActualLRPStateRunning))
})
Context("in a fully-featured preloaded rootfs", func() {
BeforeEach(func() {
user = "vcap"
rootfs = config.DefaultRootFS
gracePath = "/tmp/grace/grace"
})
It("runs an ssh command", func() {
cmd := ssh(target, "/usr/bin/env")
session := runWithPassword(cmd, password)
Eventually(session).Should(gexec.Exit(0))
output := session.Out.Contents()
Expect(output).To(ContainSubstring("USER=" + user))
Expect(output).To(ContainSubstring("CUMBERBUND=cummerbund"))
})
It("runs an interactive ssh session", func() {
cmd := sshInteractive(target)
session := runInteractiveWithPassword(cmd, password, func(session *gexec.Session, input *os.File) {
Eventually(session).Should(gbytes.Say(user + "@"))
_, err := input.Write([]byte("export FOO=foo; echo ${FOO}bar\n"))
Expect(err).NotTo(HaveOccurred())
Eventually(session).Should(gbytes.Say("foobar"))
_, err = input.Write([]byte("exit\n"))
Expect(err).NotTo(HaveOccurred())
Eventually(session.Err).Should(gbytes.Say("Connection to " + target.Host + " closed."))
})
Eventually(session).Should(gexec.Exit(0))
})
It("forwards ports", func() {
cmd := sshTunnelTo(target, 12345, 8888)
session := runInteractiveWithPassword(cmd, password, func(session *gexec.Session, _ *os.File) {
Eventually(session.Err).Should(gbytes.Say("Warning: Permanently added"))
resp, err := http.Get("http://127.0.0.1:12345/index")
Expect(err).NotTo(HaveOccurred())
defer resp.Body.Close()
payload, err := io.ReadAll(resp.Body)
Expect(err).NotTo(HaveOccurred())
Expect(string(payload)).To(Equal("inconceivable!"))
session.Interrupt()
})
Eventually(session).Should(gexec.Exit())
})
Describe("scp", func() {
var (
dir string
err error
inpath string
)
BeforeEach(func() {
dir, err = os.MkdirTemp("", "vizzini-ssh")
Expect(err).NotTo(HaveOccurred())
inpath = path.Join(dir, "inbound")
infile, err := os.Create(inpath)
Expect(err).NotTo(HaveOccurred())
_, err = infile.Write([]byte("hello from vizzini"))
Expect(err).NotTo(HaveOccurred())
err = infile.Close()
Expect(err).NotTo(HaveOccurred())
})
AfterEach(func() {
os.RemoveAll(dir)
})
It("copies files back and forth", func() {
insession := runWithPassword(scp(target,
inpath,
target.Host+":in-container",
), password)
Eventually(insession).Should(gexec.Exit())
outpath := path.Join(dir, "outbound")
outsession := runWithPassword(scp(target,
target.Host+":in-container",
outpath,
), password)
Eventually(outsession).Should(gexec.Exit())
contents, err := os.ReadFile(outpath)
Expect(err).NotTo(HaveOccurred())
Expect(contents).To(Equal([]byte("hello from vizzini")))
})
})
Describe("sftp", func() {
var (
sourceDir, targetDir string
generatedFile, generatedFileName string
err error
)
BeforeEach(func() {
sourceDir, err = os.MkdirTemp("", "sftp-source")
Expect(err).NotTo(HaveOccurred())
fileContents := make([]byte, 1024)
b, err := rand.Read(fileContents)
Expect(err).NotTo(HaveOccurred())
Expect(b).To(Equal(len(fileContents)))
generatedFileName = "binary.dat"
generatedFile = filepath.Join(sourceDir, generatedFileName)
err = os.WriteFile(generatedFile, fileContents, 0644)
Expect(err).NotTo(HaveOccurred())
_, err = os.Stat(generatedFile)
Expect(err).NotTo(HaveOccurred())
targetDir, err = os.MkdirTemp("", "sftp-target")
Expect(err).NotTo(HaveOccurred())
})
AfterEach(func() {
os.RemoveAll(sourceDir)
os.RemoveAll(targetDir)
})
It("defaults to $HOME as the remote working directory", func() {
runInteractiveWithPassword(sftp(target), password, func(session *gexec.Session, ptyMaster *os.File) {
io.Copy(ptyMaster, strings.NewReader("pwd\n"))
Eventually(session.Buffer()).Should(gbytes.Say("working directory: /home/vcap"))
ptyMaster.Write([]byte("exit\n"))
Eventually(session).Should(gexec.Exit())
})
})
It("can send and receive files", func() {
insession := runInteractiveWithPassword(sftp(target), password,
func(session *gexec.Session, ptyMaster *os.File) {
input := &bytes.Buffer{}
input.WriteString("mkdir files\n")
input.WriteString("cd files\n")
input.WriteString("lcd " + sourceDir + "\n")
input.WriteString("put " + generatedFileName + "\n")
input.WriteString("lcd " + targetDir + "\n")
input.WriteString("get " + generatedFileName + "\n")
io.Copy(ptyMaster, input)
ptyMaster.Write([]byte("exit\n"))
Eventually(session).Should(gexec.Exit())
})
Eventually(insession).Should(gexec.Exit())
compareDir(sourceDir, targetDir)
})
})
})
Context("{DOCKER} in a bare-bones docker image with /bin/sh", func() {
BeforeEach(func() {
user = "root"
rootfs = config.GraceBusyboxImageURL
startTimeout = dockerTimeout
gracePath = "/grace"
})
It("runs an ssh command", func() {
cmd := ssh(target, "/bin/env")
session := runWithPassword(cmd, password)
Eventually(session).Should(gexec.Exit(0))
Expect(session).To(gbytes.Say("USER=" + user))
Expect(session).To(gbytes.Say("CUMBERBUND=cummerbund"))
})
It("forwards ports", func() {
cmd := sshTunnelTo(target, 22345, 8888)
session := runInteractiveWithPassword(cmd, password, func(session *gexec.Session, _ *os.File) {
Eventually(session.Err).Should(gbytes.Say("Warning: Permanently added"))
resp, err := http.Get("http://127.0.0.1:22345/index")
Expect(err).NotTo(HaveOccurred())
defer resp.Body.Close()
payload, err := io.ReadAll(resp.Body)
Expect(err).NotTo(HaveOccurred())
Expect(string(payload)).To(Equal("inconceivable!"))
session.Interrupt()
})
Eventually(session).Should(gexec.Exit())
})
})
})
func runWithPassword(cmd *exec.Cmd, password string) *gexec.Session {
return runInteractiveWithPassword(cmd, password, func(session *gexec.Session, _ *os.File) {
Eventually(session).Should(gexec.Exit())
})
}
func runInteractiveWithPassword(cmd *exec.Cmd, password string, actions func(*gexec.Session, *os.File)) *gexec.Session {
passwordInput := password + "\n"
// Create pty pseudo-terminal so that ptyClient can input password when
// prompted
ptyClient, ptyServer, err := pty.Open()
Expect(err).NotTo(HaveOccurred())
defer ptyClient.Close()
cmd.Stdin = ptyServer
cmd.Stdout = ptyServer
cmd.Stderr = ptyServer
cmd.SysProcAttr = &syscall.SysProcAttr{
Setctty: true,
Setsid: true,
}
session, err := gexec.Start(cmd, GinkgoWriter, GinkgoWriter)
Expect(err).NotTo(HaveOccurred())
// Close our open reference to ptyServer so that PTYClient recieves EOF
ptyServer.Close()
sendPassword(ptyClient, passwordInput)
done := make(chan struct{})
go func() {
io.Copy(GinkgoWriter, ptyClient)
close(done)
}()
actions(session, ptyClient)
Eventually(done).Should(BeClosed())
return session
}
func sendPassword(pty *os.File, password string) {
passwordPrompt := []byte("password: ")
b := make([]byte, 1)
buf := []byte{}
done := make(chan struct{})
go func() {
defer GinkgoRecover()
for {
n, err := pty.Read(b)
Expect(n).To(Equal(1))
Expect(err).NotTo(HaveOccurred())
buf = append(buf, b[0])
if bytes.HasSuffix(buf, passwordPrompt) {
break
}
}
n, err := pty.Write([]byte(password))
Expect(err).NotTo(HaveOccurred())
Expect(n).To(Equal(len(password)))
close(done)
}()
Eventually(done).Should(BeClosed())
}
func compareDir(actualDir, expectedDir string) {
actualDirInfo, err := os.Stat(actualDir)
Expect(err).NotTo(HaveOccurred())
expectedDirInfo, err := os.Stat(expectedDir)
Expect(err).NotTo(HaveOccurred())
Expect(actualDirInfo.Mode()).To(Equal(expectedDirInfo.Mode()))
actualFiles, err := os.ReadDir(actualDir)
Expect(err).NotTo(HaveOccurred())
expectedFiles, err := os.ReadDir(actualDir)
Expect(err).NotTo(HaveOccurred())
Expect(len(actualFiles)).To(Equal(len(expectedFiles)))
for i, actualFile := range actualFiles {
expectedFile := expectedFiles[i]
if actualFile.IsDir() {
compareDir(filepath.Join(actualDir, actualFile.Name()), filepath.Join(expectedDir, expectedFile.Name()))
} else {
compareFile(filepath.Join(actualDir, actualFile.Name()), filepath.Join(expectedDir, expectedFile.Name()))
}
}
}
func compareFile(actualFile, expectedFile string) {
actualFileInfo, err := os.Stat(actualFile)
Expect(err).NotTo(HaveOccurred())
expectedFileInfo, err := os.Stat(expectedFile)
Expect(err).NotTo(HaveOccurred())
Expect(actualFileInfo.Mode()).To(Equal(expectedFileInfo.Mode()))
Expect(actualFileInfo.Size()).To(Equal(expectedFileInfo.Size()))
actualContents, err := os.ReadFile(actualFile)
Expect(err).NotTo(HaveOccurred())
expectedContents, err := os.ReadFile(expectedFile)
Expect(err).NotTo(HaveOccurred())
Expect(actualContents).To(Equal(expectedContents))
}