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.. _mozilla_projects_nss_reference_fc_verifyrecover:
FC_VerifyRecover
================
`Name <#name>`__
~~~~~~~~~~~~~~~~
.. container::
FC_VerifyRecover - Verify data in a single recoverable operation.
`Syntax <#syntax>`__
~~~~~~~~~~~~~~~~~~~~
.. container::
.. code:: eval
CK_RV FC_VerifyRecover(
CK_SESSION_HANDLE hSession,
CK_BYTE_PTR pSignature,
CK_ULONG usSignatureLen,
CK_BYTE_PTR pData,
CK_ULONG_PTR pusDataLen
);
`Parameters <#parameters>`__
~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.. container::
``hSession``
[in] session handle.
``pSignature``
[in] mechanism to be used for the signing operation.
``usSignatureLen``
[in] handle of the key to be usedn.
``pData``
[out] pointer to the buffer or NULL.
``pusDataLen``
[in, out] pointer to the size of the output buffer, replaced by the length of the signature if
the operation is successful.
`Description <#description>`__
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.. container::
``FC_VerifyRecover`` verifies data in a single operation where the (digest) data can be recovered
from the signature. If ``pSignature`` is NULL only the length of the signature is returned in
``*pusSignatureLen``.
A user must log into the token (to assume the NSS User role) before calling ``FC_VerifyRecover``.
.. _return_value:
`Return value <#return_value>`__
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.. container::
`Examples <#examples>`__
~~~~~~~~~~~~~~~~~~~~~~~~
.. container::
.. _see_also:
`See also <#see_also>`__
~~~~~~~~~~~~~~~~~~~~~~~~
.. container::
- `NSC_VerifyRecover </en-US/NSC_VerifyRecover>`__
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