packer-cn/communicator/ssh/communicator_test.go

197 lines
5.3 KiB
Go
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package ssh
import (
"bytes"
"code.google.com/p/go.crypto/ssh"
"fmt"
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"github.com/mitchellh/packer/packer"
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"net"
"strings"
"testing"
)
// private key for mock server
const testServerPrivateKey = `-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----`
// password implements the ClientPassword interface
type password string
func (p password) Password(user string) (string, error) {
return string(p), nil
}
var serverConfig = &ssh.ServerConfig{
PasswordCallback: func(c *ssh.ServerConn, user, pass string) bool {
return user == "user" && pass == "pass"
},
}
func init() {
// Set the private key of the server, required to accept connections
if err := serverConfig.SetRSAPrivateKey([]byte(testServerPrivateKey)); err != nil {
panic("unable to set private key: " + err.Error())
}
}
func newMockLineServer(t *testing.T) string {
l, err := ssh.Listen("tcp", "127.0.0.1:0", serverConfig)
if err != nil {
t.Fatalf("unable to newMockAuthServer: %s", err)
}
go func() {
defer l.Close()
c, err := l.Accept()
if err != nil {
t.Errorf("Unable to accept incoming connection: %v", err)
return
}
if err := c.Handshake(); err != nil {
// not Errorf because this is expected to
// fail for some tests.
t.Logf("Handshaking error: %v", err)
return
}
t.Log("Accepted SSH connection")
defer c.Close()
channel, err := c.Accept()
if err != nil {
t.Errorf("Unable to accept a channel: %s", err)
return
}
// Just go in a loop now accepting things... we need to
// do this to handle packets for SSH.
go func() {
c.Accept()
}()
channel.Accept()
t.Log("Accepted channel")
defer channel.Close()
data := make([]byte, 0)
_, err = channel.Read(data)
if err == nil {
t.Error("should've gotten a request (exec)")
return
}
req, ok := err.(ssh.ChannelRequest)
if !ok {
t.Errorf("couldn't convert err to channel request: %s", err)
return
}
if req.Request != "exec" {
t.Errorf("unexpected request type: %s", req.Request)
return
}
// Ack it
channel.AckRequest(true)
// Just respond back with the payload. We trim the first 4 bytes
// off of here because it is "\x00\x00\x00\t" and I don't really know
// why.
payload := strings.TrimSpace(string(req.Payload[4:]))
response := fmt.Sprintf("ack: %s", payload)
_, err = channel.Write([]byte(response))
if err != nil {
t.Errorf("error writing response: %s", err)
return
}
}()
return l.Addr().String()
}
func TestCommIsCommunicator(t *testing.T) {
var raw interface{}
raw = &comm{}
if _, ok := raw.(packer.Communicator); !ok {
t.Fatalf("comm must be a communicator")
}
}
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func TestNew_Invalid(t *testing.T) {
clientConfig := &ssh.ClientConfig{
User: "user",
Auth: []ssh.ClientAuth{
ssh.ClientAuthPassword(password("i-am-invalid")),
},
}
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conn, err := net.Dial("tcp", newMockLineServer(t))
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if err != nil {
t.Fatalf("unable to dial to remote side: %s", err)
}
_, err = New(conn, clientConfig)
if err == nil {
t.Fatal("should have had an error connecting")
}
}
func TestStart(t *testing.T) {
clientConfig := &ssh.ClientConfig{
User: "user",
Auth: []ssh.ClientAuth{
ssh.ClientAuthPassword(password("pass")),
},
}
conn, err := net.Dial("tcp", newMockLineServer(t))
if err != nil {
t.Fatalf("unable to dial to remote side: %s", err)
}
client, err := New(conn, clientConfig)
if err != nil {
t.Fatalf("error connecting to SSH: %s", err)
}
remote, err := client.Start("echo foo")
if err != nil {
t.Fatalf("error executing command: %s", err)
}
// Wait for it to complete
t.Log("Waiting for command to complete")
remote.Wait()
// Should have the correct output
output := remote.Stdout.(*bytes.Buffer).String()
if output != "ack: echo foo" {
t.Fatalf("unknown output: %#v", output)
}
}