// Init initializes this CryptoSigner.
func (s *CryptoSigner) Init(csp bccsp.BCCSP, key bccsp.Key) error {
// Validate arguments
if csp == nil {
return errors.New("Invalid BCCSP. Nil.")
}
if key == nil {
return errors.New("Invalid Key. Nil.")
}
if key.Symmetric() {
return errors.New("Invalid Key. Symmetric.")
}
// Marshall the bccsp public key as a crypto.PublicKey
pub, err := key.PublicKey()
if err != nil {
return fmt.Errorf("Failed getting public key [%s]", err)
}
raw, err := pub.Bytes()
if err != nil {
return fmt.Errorf("Failed marshalling public key [%s]", err)
}
pk, err := utils.DERToPublicKey(raw)
if err != nil {
return fmt.Errorf("Failed marshalling public key [%s]", err)
}
// Init fields
s.csp = csp
s.key = key
s.pk = pk
return nil
}