packer-cn/builder/triton/ssh.go

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package triton
import (
"fmt"
"io/ioutil"
"log"
"net"
"os"
packerssh "github.com/hashicorp/packer/communicator/ssh"
"github.com/mitchellh/multistep"
"golang.org/x/crypto/ssh"
"golang.org/x/crypto/ssh/agent"
)
func commHost(state multistep.StateBag) (string, error) {
driver := state.Get("driver").(Driver)
machineID := state.Get("machine").(string)
machine, err := driver.GetMachineIP(machineID)
if err != nil {
return "", err
}
return machine, nil
}
// SSHConfig returns a function that can be used for the SSH communicator
// config for connecting to the instance created over SSH using the private key
// or password.
func sshConfig(useAgent bool, username, privateKeyPath, password string) func(multistep.StateBag) (*ssh.ClientConfig, error) {
return func(state multistep.StateBag) (*ssh.ClientConfig, error) {
if useAgent {
log.Println("Configuring SSH agent.")
authSock := os.Getenv("SSH_AUTH_SOCK")
if authSock == "" {
return nil, fmt.Errorf("SSH_AUTH_SOCK is not set")
}
sshAgent, err := net.Dial("unix", authSock)
if err != nil {
return nil, fmt.Errorf("Cannot connect to SSH Agent socket %q: %s", authSock, err)
}
return &ssh.ClientConfig{
User: username,
Auth: []ssh.AuthMethod{
ssh.PublicKeysCallback(agent.NewClient(sshAgent).Signers),
},
HostKeyCallback: ssh.InsecureIgnoreHostKey(),
}, nil
}
hasKey := privateKeyPath != ""
if hasKey {
log.Printf("Configuring SSH private key '%s'.", privateKeyPath)
privateKeyBytes, err := ioutil.ReadFile(privateKeyPath)
if err != nil {
return nil, fmt.Errorf("Unable to read SSH private key: %s", err)
}
signer, err := ssh.ParsePrivateKey(privateKeyBytes)
if err != nil {
return nil, fmt.Errorf("Error setting up SSH config: %s", err)
}
return &ssh.ClientConfig{
User: username,
Auth: []ssh.AuthMethod{
ssh.PublicKeys(signer),
},
HostKeyCallback: ssh.InsecureIgnoreHostKey(),
}, nil
} else {
log.Println("Configuring SSH keyboard interactive.")
return &ssh.ClientConfig{
User: username,
HostKeyCallback: ssh.InsecureIgnoreHostKey(),
Auth: []ssh.AuthMethod{
ssh.Password(password),
ssh.KeyboardInteractive(
packerssh.PasswordKeyboardInteractive(password)),
}}, nil
}
}
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}