const char * url
A PKCS 11 url identifying a token
const gnutls_datum_t * dn
is the DN to search for (may be NULL)
const gnutls_datum_t * spki
is the subject key ID to search for
gnutls_datum_t * issuer
Will hold the issuer if any in an allocated buffer.
The format of the exported issuer.
unsigned int flags
Use zero or flags from GNUTLS_PKCS11_OBJ_FLAG.
This function will return the certificate with the given DN and
spki , if it is stored in the token. By default only marked as
trusted issuers are returned. If any issuer should be returned
specify GNUTLS_PKCS11_OBJ_FLAG_RETRIEVE_ANY in flags .
The name of the function includes issuer because it can be used
to discover issuers of certificates.
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