.. hazmat::

.. module:: cryptography.hazmat.primitives.asymmetric

Signature Interfaces
====================

.. class:: AsymmetricSignatureContext

    .. versionadded:: 0.2

    .. note::

        :class:`~cryptography.hazmat.primitives.asymmetric.utils.Prehashed`
        is not supported by this context. You must use the ``sign`` method
        on the private key object.

    .. method:: update(data)

        :param bytes data: The data you want to sign.

    .. method:: finalize()

        :return bytes signature: The signature.


.. class:: AsymmetricVerificationContext

    .. versionadded:: 0.2

    .. note::

        :class:`~cryptography.hazmat.primitives.asymmetric.utils.Prehashed`
        is not supported by this context. You must use the ``verify`` method
        on the public key object.

    .. method:: update(data)

        :param bytes data: The data you wish to verify using the signature.

    .. method:: verify()

        :raises cryptography.exceptions.InvalidSignature: If the signature does
            not validate.