.. _mozilla_projects_nss_cert_findcertbydercert:

CERT_FindCertByDERCert
======================

.. container::

   Find a certificate in the database that matches a DER-encoded certificate.

`Syntax <#syntax>`__
~~~~~~~~~~~~~~~~~~~~

.. container::

   .. code:: notranslate

      #include <cert.h>
      CERTCertificate *CERT_FindCertByDERCert(

          CERTCertDBHandle *handle,
          SECItem          *derCert          );

`Parameters <#parameters>`__
~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. container::

   +-------------+-----------------------------------------------------------------------------------+
   | ``handle``  | *in* pointer to a `CERTCertDBHandle </en-US/NSS/CERTCertDBHandle>`__ representing |
   |             | the certificate database to look in                                               |
   +-------------+-----------------------------------------------------------------------------------+
   | ``derCert`` | *in* pointer to an `SECItem </en-US/NSS/SECItem>`__ whose ``type`` must be        |
   |             | ``siDERCertBuffer`` and whose ``data`` contains a DER-encoded certificate         |
   +-------------+-----------------------------------------------------------------------------------+

`Description <#description>`__
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. container::

   This function looks in the ?NSSCryptoContext? and the ?NSSTrustDomain? to find the certificate
   that matches the DER-encoded certificate. A match is found when the issuer and serial number of
   the DER-encoded certificate are found on a certificate in the certificate database.

`Returns <#returns>`__
~~~~~~~~~~~~~~~~~~~~~~

.. container::

   A pointer to a `CERTCertificate </en-US/NSS/CERTCertificate>`__ representing the certificate in
   the database that matched the ``derCert``, or ``NULL`` if none was found. The certificate is a
   shallow copy, use `CERT_DestroyCertificate </en-US/NSS/CERT_DestroyCertificate>`__ to decrement
   the reference count on the certificate instance.

.. _see_also:

`See Also <#see_also>`__
~~~~~~~~~~~~~~~~~~~~~~~~

.. container::

   Occurrences of
   ```CERT_FindCertByDERCert`` <http://lxr.mozilla.org/security/ident?i=CERT_FindCertByDERCert>`__
   in the current NSS source code (generated by `LXR <http://lxr.mozilla.org/security/>`__).