nowk/co

Signature utility around `crypto/hmac`

co

Signature utility around crypto/hmac

Examples

Given a struct

type S3 struct {
  Filename string
  Mime     string
  Expires  int64
}

// Message satisfies co.Messenger interface
func (s S3) Message() ([]byte, error) {
  return []byte(strings.Join([]string{
    "GET",
    "",
    s.Mime,
    strconv.FormatInt(s.Expires, 10),
    s.Path(),
  }, "\n")), nil
}

func (s S3) Path() string {
  return fmt.Sprintf("bucket/%s", s.Filename)
}

---

Pass a struct that implements co.Messenger and provide your sha & key

sig, err := co.Sign(S3{}, sha1.New, "asecret")
if err != nil {
  // handle err
}

---

Signature can be base64'd

b, err := sig.Base64()
if err != nil {
  // handle err
}

License

MIT