37 lines
806 B
Go
37 lines
806 B
Go
|
package machineid
|
||
|
|
|
||
|
|
import (
|
||
|
|
"crypto/hmac"
|
||
|
|
"crypto/sha256"
|
||
|
|
"encoding/hex"
|
||
|
|
"io"
|
||
|
|
"io/ioutil"
|
||
|
|
"os"
|
||
|
|
"os/exec"
|
||
|
|
"strings"
|
||
|
|
)
|
||
|
|
|
||
|
|
// run wraps `exec.Command` with easy access to stdout and stderr.
|
||
|
|
func run(stdout, stderr io.Writer, cmd string, args ...string) error {
|
||
|
|
c := exec.Command(cmd, args...)
|
||
|
|
c.Stdin = os.Stdin
|
||
|
|
c.Stdout = stdout
|
||
|
|
c.Stderr = stderr
|
||
|
|
return c.Run()
|
||
|
|
}
|
||
|
|
|
||
|
|
// protect calculates HMAC-SHA256 of the application ID, keyed by the machine ID and returns a hex-encoded string.
|
||
|
|
func protect(appID, id string) string {
|
||
|
|
mac := hmac.New(sha256.New, []byte(id))
|
||
|
|
mac.Write([]byte(appID))
|
||
|
|
return hex.EncodeToString(mac.Sum(nil))
|
||
|
|
}
|
||
|
|
|
||
|
|
func readFile(filename string) ([]byte, error) {
|
||
|
|
return ioutil.ReadFile(filename)
|
||
|
|
}
|
||
|
|
|
||
|
|
func trim(s string) string {
|
||
|
|
return strings.TrimSpace(strings.Trim(s, "\n"))
|
||
|
|
}
|