80 lines
2.0 KiB
Go
80 lines
2.0 KiB
Go
package null
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import (
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"fmt"
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"io/ioutil"
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"net"
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"os"
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"github.com/hashicorp/packer/communicator/ssh"
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"github.com/mitchellh/multistep"
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gossh "golang.org/x/crypto/ssh"
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"golang.org/x/crypto/ssh/agent"
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)
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func CommHost(host string) func(multistep.StateBag) (string, error) {
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return func(state multistep.StateBag) (string, error) {
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return host, nil
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}
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}
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// SSHConfig returns a function that can be used for the SSH communicator
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// config for connecting to the specified host via SSH
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// private_key_file has precedence over password!
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func SSHConfig(useAgent bool, username string, password string, privateKeyFile string) func(multistep.StateBag) (*gossh.ClientConfig, error) {
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return func(state multistep.StateBag) (*gossh.ClientConfig, error) {
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if useAgent {
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authSock := os.Getenv("SSH_AUTH_SOCK")
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if authSock == "" {
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return nil, fmt.Errorf("SSH_AUTH_SOCK is not set")
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}
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sshAgent, err := net.Dial("unix", authSock)
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if err != nil {
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return nil, fmt.Errorf("Cannot connect to SSH Agent socket %q: %s", authSock, err)
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}
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return &gossh.ClientConfig{
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User: username,
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Auth: []gossh.AuthMethod{
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gossh.PublicKeysCallback(agent.NewClient(sshAgent).Signers),
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},
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}, nil
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}
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if privateKeyFile != "" {
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// key based auth
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bytes, err := ioutil.ReadFile(privateKeyFile)
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if err != nil {
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return nil, fmt.Errorf("Error setting up SSH config: %s", err)
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}
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privateKey := string(bytes)
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signer, err := gossh.ParsePrivateKey([]byte(privateKey))
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if err != nil {
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return nil, fmt.Errorf("Error setting up SSH config: %s", err)
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}
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return &gossh.ClientConfig{
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User: username,
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Auth: []gossh.AuthMethod{
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gossh.PublicKeys(signer),
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},
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}, nil
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} else {
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// password based auth
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return &gossh.ClientConfig{
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User: username,
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Auth: []gossh.AuthMethod{
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gossh.Password(password),
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gossh.KeyboardInteractive(
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ssh.PasswordKeyboardInteractive(password)),
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},
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HostKeyCallback: gossh.InsecureIgnoreHostKey(),
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}, nil
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}
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}
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}
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