/
handler.go
96 lines (87 loc) · 2.19 KB
/
handler.go
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package client
import (
"bytes"
"github.com/dyntek-services-inc/goconfigure/inventory"
"golang.org/x/crypto/ssh"
"io"
"os"
)
type Handler interface {
Send(string) (string, error)
io.Closer
}
type SSHHandler struct {
client *ssh.Client
}
type Authentication func(host inventory.Host) (Handler, error)
//func BasicConnect(host inventory.Host) (Handler, error) {
// config := &ssh.ClientConfig{
// User: host.Username,
// Auth: []ssh.AuthMethod{
// ssh.Password(host.Password),
// },
// HostKeyCallback: ssh.InsecureIgnoreHostKey(),
// }
// client, err := ssh.Dial("tcp", host.Hostname+":22", config)
// if err != nil {
// return nil, err
// }
// return &SSHHandler{client: client}, nil
//}
func BasicConnect() (Authentication, error) {
return func(host inventory.Host) (Handler, error) {
config := &ssh.ClientConfig{
User: host.Username,
Auth: []ssh.AuthMethod{
ssh.Password(host.Password),
},
HostKeyCallback: ssh.InsecureIgnoreHostKey(),
}
client, err := ssh.Dial("tcp", host.Hostname+":22", config)
if err != nil {
return nil, err
}
return &SSHHandler{client: client}, nil
}, nil
}
func KeyConnect(keyfile string) (Authentication, error) {
pemBytes, err := os.ReadFile(keyfile)
if err != nil {
return nil, err
}
signer, err := ssh.ParsePrivateKey(pemBytes)
return func(host inventory.Host) (Handler, error) {
config := &ssh.ClientConfig{
User: host.Username,
Auth: []ssh.AuthMethod{
ssh.PublicKeys(signer),
//ssh.Password(host.Password),
},
HostKeyCallback: ssh.InsecureIgnoreHostKey(),
}
c, err := ssh.Dial("tcp", host.Hostname+":22", config)
if err != nil {
return nil, err
}
h := &SSHHandler{client: c}
return h, nil
}, nil
}
// Send opens a new session to the SSH server and sends the passed string.
// The standard output from the server is returned.
func (h *SSHHandler) Send(command string) (string, error) {
session, err := h.client.NewSession()
if err != nil {
return "", err
}
defer session.Close()
var outBuffer bytes.Buffer
session.Stdout = &outBuffer
if err := session.Run(command); err != nil {
return "", err
}
return outBuffer.String(), nil
}
func (h *SSHHandler) Close() error {
return h.client.Close()
}