func GeneratePrivateKey(keystorePath string) (bccsp.Key, crypto.Signer, error)
GeneratePrivateKey creates a private key and stores it in keystorePath
func GetECPublicKey(priv bccsp.Key) (*ecdsa.PublicKey, error)
func LoadPrivateKey(keystorePath string) (bccsp.Key, crypto.Signer, error)
LoadPrivateKey loads a private key from file in keystorePath