// JavaPublicKey converts the provided Go PublicKey into Java PublicKey.
func JavaPublicKey(env jutil.Env, key security.PublicKey) (jutil.Object, error) {
if key == nil {
return jutil.NullObject, nil
}
der, err := key.MarshalBinary()
if err != nil {
return jutil.NullObject, err
}
return JavaPublicKeyFromDER(env, der)
}
func selectColor(key security.PublicKey) Color {
var (
bytes, _ = key.MarshalBinary()
uid = md5.Sum(bytes)
pick = func(idx int) float32 {
// Keep component between [30, 225] instead of [0,255]
// to avoid white and black - and then normalize to [0, 1]
return (30 + (float32(uid[idx])/255.0)*(225-30)) / 255
}
)
// Consider md5 to have uniform randomness in all its bytes.
// We're just selecting a color, no need to fret if it doesn't.
return Color{R: pick(0), G: pick(7), B: pick(15)}
}