gnutls_certificate_set_retrieve_function2 - API function
cred, gnutls_certificate_retrieve_function2 *
- gnutls_certificate_credentials_t cred
- is a gnutls_certificate_credentials_t type.
- gnutls_certificate_retrieve_function2 * func
- is the callback function
This function sets a callback to be called in order to retrieve the certificate
to be used in the handshake. The callback will take control only if a
certificate is requested by the peer.
The callback's function prototype is: int (*callback)(gnutls_session_t, const
gnutls_datum_t* req_ca_dn, int nreqs, const gnutls_pk_algorithm_t* pk_algos,
int pk_algos_length, gnutls_pcert_st** pcert, unsigned int *pcert_length,
gnutls_privkey_t * pkey);
is only used in X.509 certificates. Contains a list with the
CA names that the server considers trusted. This is a hint and typically the
client should send a certificate that is signed by one of these CAs. These
names, when available, are DER encoded. To get a more meaningful value use the
contains a list with server's acceptable public key algorithms.
The certificate returned should support the server's given algorithms.
should contain a single certificate and public key or a list of
is the size of the previous list.
is the private key.
If the callback function is provided then gnutls will call it, in the handshake,
after the certificate request message has been received. All the provided by
the callback values will not be released or modified by gnutls.
In server side pk_algos and req_ca_dn are NULL.
The callback function should set the certificate list to be sent, and return 0
on success. If no certificate was selected then the number of certificates
should be set to zero. The value (-1) indicates error and the handshake will
be terminated. If both certificates are set in the credentials and a callback
is available, the callback takes predence.
Report bugs to <firstname.lastname@example.org>.
Home page: http://www.gnutls.org
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