func GenerateSig()

in image/create.go [244:281]

• 30 lines of code
• 7 McCabe index (conditional complexity)

func GenerateSig(key sec.PrivSignKey, hash []byte) (sec.Sig, error) {
	pub := key.PubKey()
	typ, err := pub.SigType()
	if err != nil {
		return sec.Sig{}, err
	}

	var data []byte

	switch typ {
	case sec.SIG_TYPE_RSA2048, sec.SIG_TYPE_RSA3072:
		data, err = GenerateSigRsa(key, hash)

	case sec.SIG_TYPE_ECDSA224, sec.SIG_TYPE_ECDSA256:
		data, err = GenerateSigEc(key, hash)

	case sec.SIG_TYPE_ED25519:
		data, err = GenerateSigEd25519(key, hash)

	default:
		err = errors.Errorf("unknown sig type: %v", typ)
	}

	if err != nil {
		return sec.Sig{}, err
	}

	keyHash, err := pub.Hash()
	if err != nil {
		return sec.Sig{}, err
	}

	return sec.Sig{
		Type:    typ,
		KeyHash: keyHash,
		Data:    data,
	}, nil
}