is a gnutls_certificate_credentials_t type.
The index of the certificate list to obtain.
gnutls_x509_crt_t ** crt_list
Where to store the certificate list.
unsigned * crt_list_size
Will hold the number of certificates.
Obtains a X.509 certificate list that has been stored in res with
one of gnutls_certificate_set_x509_key(),
gnutls_certificate_set_x509_key_mem2(). Each certificate in the
returned certificate list must be deallocated with
gnutls_x509_crt_deinit(), and the list itself must be freed with
The index matches the return value of
gnutls_certificate_set_x509_key() and friends functions, when the
GNUTLS_CERTIFICATE_API_V2 flag is set.
If there is no certificate with the given index,
GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE is returned. If the certificate
with the given index is not a X.509 certificate,
GNUTLS_E_INVALID_REQUEST is returned. The returned certificates must
be deinitialized after use, and the crt_list pointer must be freed
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gnutls 3.6.9 gnutls_certificate_get_x509_crt(3)