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// +build !race
package ssh
import (
"bufio"
"bytes"
"fmt"
"io"
"io/ioutil"
"math/rand"
"net"
"os"
"path/filepath"
"regexp"
"strings"
"testing"
"github.com/hashicorp/terraform/communicator/remote"
"github.com/hashicorp/terraform/terraform"
"golang.org/x/crypto/ssh"
)
// private key for mock server
const testServerPrivateKey = `-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----`
var serverConfig = &ssh.ServerConfig{
PasswordCallback: acceptUserPass("user", "pass"),
PublicKeyCallback: acceptPublicKey(testClientPublicKey),
}
func init() {
// Parse and set the private key of the server, required to accept connections
signer, err := ssh.ParsePrivateKey([]byte(testServerPrivateKey))
if err != nil {
panic("unable to parse private key: " + err.Error())
}
serverConfig.AddHostKey(signer)
}
func newMockLineServer(t *testing.T) string {
l, err := net.Listen("tcp", "127.0.0.1:0")
if err != nil {
t.Fatalf("Unable to listen for connection: %s", err)
}
go func() {
defer l.Close()
c, err := l.Accept()
if err != nil {
t.Errorf("Unable to accept incoming connection: %s", err)
}
defer c.Close()
conn, chans, _, err := ssh.NewServerConn(c, serverConfig)
if err != nil {
t.Logf("Handshaking error: %v", err)
}
t.Log("Accepted SSH connection")
for newChannel := range chans {
channel, requests, err := newChannel.Accept()
if err != nil {
t.Errorf("Unable to accept channel.")
}
t.Log("Accepted channel")
go func(in <-chan *ssh.Request) {
for req := range in {
if req.WantReply {
req.Reply(true, nil)
}
}
}(requests)
go func(newChannel ssh.NewChannel) {
conn.OpenChannel(newChannel.ChannelType(), nil)
}(newChannel)
defer channel.Close()
}
conn.Close()
}()
return l.Addr().String()
}
func TestNew_Invalid(t *testing.T) {
address := newMockLineServer(t)
parts := strings.Split(address, ":")
r := &terraform.InstanceState{
Ephemeral: terraform.EphemeralState{
ConnInfo: map[string]string{
"type": "ssh",
"user": "user",
"password": "i-am-invalid",
"host": parts[0],
"port": parts[1],
"timeout": "30s",
},
},
}
c, err := New(r)
if err != nil {
t.Fatalf("error creating communicator: %s", err)
}
err = c.Connect(nil)
if err == nil {
t.Fatal("should have had an error connecting")
}
}
func TestStart(t *testing.T) {
address := newMockLineServer(t)
parts := strings.Split(address, ":")
r := &terraform.InstanceState{
Ephemeral: terraform.EphemeralState{
ConnInfo: map[string]string{
"type": "ssh",
"user": "user",
"password": "pass",
"host": parts[0],
"port": parts[1],
"timeout": "30s",
},
},
}
c, err := New(r)
if err != nil {
t.Fatalf("error creating communicator: %s", err)
}
var cmd remote.Cmd
stdout := new(bytes.Buffer)
cmd.Command = "echo foo"
cmd.Stdout = stdout
err = c.Start(&cmd)
if err != nil {
t.Fatalf("error executing remote command: %s", err)
}
}
func TestAccUploadFile(t *testing.T) {
// use the local ssh server and scp binary to check uploads
if ok := os.Getenv("SSH_UPLOAD_TEST"); ok == "" {
t.Log("Skipping Upload Acceptance without SSH_UPLOAD_TEST set")
t.Skip()
}
r := &terraform.InstanceState{
Ephemeral: terraform.EphemeralState{
ConnInfo: map[string]string{
"type": "ssh",
"user": os.Getenv("USER"),
"host": "127.0.0.1",
"port": "22",
"timeout": "30s",
},
},
}
c, err := New(r)
if err != nil {
t.Fatalf("error creating communicator: %s", err)
}
tmpDir, err := ioutil.TempDir("", "communicator")
if err != nil {
t.Fatal(err)
}
defer os.RemoveAll(tmpDir)
content := []byte("this is the file content")
source := bytes.NewReader(content)
tmpFile := filepath.Join(tmpDir, "tempFile.out")
err = c.Upload(tmpFile, source)
if err != nil {
t.Fatalf("error uploading file: %s", err)
}
data, err := ioutil.ReadFile(tmpFile)
if err != nil {
t.Fatal(err)
}
if !bytes.Equal(data, content) {
t.Fatalf("bad: %s", data)
}
}
func TestAccHugeUploadFile(t *testing.T) {
// use the local ssh server and scp binary to check uploads
if ok := os.Getenv("SSH_UPLOAD_TEST"); ok == "" {
t.Log("Skipping Upload Acceptance without SSH_UPLOAD_TEST set")
t.Skip()
}
r := &terraform.InstanceState{
Ephemeral: terraform.EphemeralState{
ConnInfo: map[string]string{
"type": "ssh",
"user": os.Getenv("USER"),
"host": "127.0.0.1",
"port": "22",
"timeout": "30s",
},
},
}
c, err := New(r)
if err != nil {
t.Fatalf("error creating communicator: %s", err)
}
// copy 4GB of data, random to prevent compression.
size := int64(1 << 32)
source := io.LimitReader(rand.New(rand.NewSource(0)), size)
dest, err := ioutil.TempFile("", "communicator")
if err != nil {
t.Fatal(err)
}
destName := dest.Name()
dest.Close()
defer os.Remove(destName)
t.Log("Uploading to", destName)
// bypass the Upload method so we can directly supply the file size
// preventing the extra copy of the huge file.
targetDir := filepath.Dir(destName)
targetFile := filepath.Base(destName)
scpFunc := func(w io.Writer, stdoutR *bufio.Reader) error {
return scpUploadFile(targetFile, source, w, stdoutR, size)
}
err = c.scpSession("scp -vt "+targetDir, scpFunc)
if err != nil {
t.Fatal(err)
}
// check the final file size
fs, err := os.Stat(destName)
if err != nil {
t.Fatal(err)
}
if fs.Size() != size {
t.Fatalf("expected file size of %d, got %d", size, fs.Size())
}
}
func TestScriptPath(t *testing.T) {
cases := []struct {
Input string
Pattern string
}{
{
"/tmp/script.sh",
`^/tmp/script\.sh$`,
},
{
"/tmp/script_%RAND%.sh",
`^/tmp/script_(\d+)\.sh$`,
},
}
for _, tc := range cases {
r := &terraform.InstanceState{
Ephemeral: terraform.EphemeralState{
ConnInfo: map[string]string{
"type": "ssh",
"script_path": tc.Input,
},
},
}
comm, err := New(r)
if err != nil {
t.Fatalf("err: %s", err)
}
output := comm.ScriptPath()
match, err := regexp.Match(tc.Pattern, []byte(output))
if err != nil {
t.Fatalf("bad: %s\n\nerr: %s", tc.Input, err)
}
if !match {
t.Fatalf("bad: %s\n\n%s", tc.Input, output)
}
}
}
func TestScriptPath_randSeed(t *testing.T) {
// Pre GH-4186 fix, this value was the deterministic start the pseudorandom
// chain of unseeded math/rand values for Int31().
staticSeedPath := "/tmp/terraform_1298498081.sh"
c, err := New(&terraform.InstanceState{})
if err != nil {
t.Fatalf("err: %s", err)
}
path := c.ScriptPath()
if path == staticSeedPath {
t.Fatalf("rand not seeded! got: %s", path)
}
}
const testClientPrivateKey = `-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----`
var testClientPublicKey = `ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDE6A1c4n+OtEPEFlNKTZf2i03L3NylSYmvmJ8OLmzLuPZmJBJt4G3VZ/60s1aKzwLKrTq20S+ONG4zvnK5zIPoauoNNdUJKbg944hB4OE+HDbrBhk7SH+YWCsCILBoSXwAVdUEic6FWf/SeqBSmTBySHvpuNOw16J+SK6Ardx8k64F2tRkZuC6AmOZijgKa/sQKjWAIVPk34ECM6OLfPc3kKUEfkdpYLvuMfuRMfSTlxn5lFC0b0SovK9aWfNMBH9iXLQkieQ5rXoyzUC7mwgnASgl8cqw1UrToiUuhvneduXBhbQfmC/Upv+tL6dSSk+0DlgVKEHuJmc8s8+/qpdL`
func acceptUserPass(goodUser, goodPass string) func(ssh.ConnMetadata, []byte) (*ssh.Permissions, error) {
return func(c ssh.ConnMetadata, pass []byte) (*ssh.Permissions, error) {
if c.User() == goodUser && string(pass) == goodPass {
return nil, nil
}
return nil, fmt.Errorf("password rejected for %q", c.User())
}
}
func acceptPublicKey(keystr string) func(ssh.ConnMetadata, ssh.PublicKey) (*ssh.Permissions, error) {
goodkey, _, _, _, err := ssh.ParseAuthorizedKey([]byte(keystr))
if err != nil {
panic(fmt.Errorf("error parsing key: %s", err))
}
return func(_ ssh.ConnMetadata, inkey ssh.PublicKey) (*ssh.Permissions, error) {
if bytes.Compare(inkey.Marshal(), goodkey.Marshal()) == 0 {
return nil, nil
}
return nil, fmt.Errorf("public key rejected")
}
}