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package main
import (
"fmt"
"net"
"os"
"time"
"golang.org/x/crypto/ssh"
)
type client struct {
Conn net.Conn
Config *ssh.ClientConfig
}
func newClient(conn net.Conn, user string, key string) (*client, error) {
config, err := newConfig(user, key)
if err != nil {
return nil, fmt.Errorf("Error getting config for native Go SSH: %s", err)
}
return &client{
Conn: conn,
Config: config,
}, nil
}
func newConfig(user string, keyFile string) (*ssh.ClientConfig, error) {
key, err := os.ReadFile(keyFile)
if err != nil {
return nil, err
}
privateKey, err := ssh.ParsePrivateKey(key)
if err != nil {
return nil, err
}
return &ssh.ClientConfig{
User: user,
Auth: []ssh.AuthMethod{ssh.PublicKeys(privateKey)},
// #nosec G106
HostKeyCallback: ssh.InsecureIgnoreHostKey(),
Timeout: time.Minute,
}, nil
}
func (client *client) output(command string) (string, error) {
c, chans, reqs, err := ssh.NewClientConn(client.Conn, "", client.Config)
if err != nil {
return "", err
}
conn := ssh.NewClient(c, chans, reqs)
session, err := conn.NewSession()
if err != nil {
_ = conn.Close()
return "", err
}
defer conn.Close()
defer session.Close()
output, err := session.CombinedOutput(command)
if err != nil {
return "", err
}
return string(output), nil
}
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