Function require_cryptography

opcua/crypto/security_policies.py:18–24

Raise exception if cryptography module is not available. Call this function in constructors.

(obj)

def require_cryptography(obj):
    """
    Raise exception if cryptography module is not available.
    Call this function in constructors.
    """
    if not CRYPTOGRAPHY_AVAILABLE:
        raise UaError("Can't use {0}, cryptography module is not installed".format(obj.__class__.__name__))


class Signer(object):