// FingerprintTriple generates a SHA-1 hash of the triple.
func FingerprintTriple(t *protocol.Triple) ([]byte, error) {
data, err := t.Marshal()
if err != nil {
return nil, err
}
sum := sha1.Sum(data)
return sum[:], nil
}
// FingerprintTriple generates a SHA-1 hash of the triple.
func FingerprintTriple(t *protocol.Triple) ([]byte, error) {
h := sha1.New()
data, err := t.Marshal()
if err != nil {
return nil, err
}
if _, err := h.Write(data); err != nil {
return nil, err
}
return h.Sum(nil), nil
}
func (key *PrivateKey) SignTriple(t *protocol.Triple) error {
var err error
t.Author, err = key.AuthorID()
if err != nil {
return err
}
fingerprint, err := FingerprintTriple(t)
if err != nil {
return err
}
r, s, err := ecdsa.Sign(rand.Reader, (*ecdsa.PrivateKey)(key), fingerprint)
if err != nil {
return err
}
t.Sig = string(r.Bytes()) + string(s.Bytes())
return nil
}