gnutls_x509_crt_get_authority_key_gn_serial — API function


#include <gnutls/x509.h>

int gnutls_x509_crt_get_authority_key_gn_serial(gnutls_x509_crt_t cert, unsigned int seq, void * alt, size_t * alt_size, unsigned int * alt_type, void * serial, size_t * serial_size, unsigned int * critical);


gnutls_x509_crt_t cert

should contain a gnutls_x509_crt_t type

unsigned int seq

specifies the sequence number of the alt name (0 for the first one, 1 for the second etc.)

void * alt

is the place where the alternative name will be copied to

size_t * alt_size

holds the size of alt.

unsigned int * alt_type

holds the type of the alternative name (one of gnutls_x509_subject_alt_name_t).

void * serial

buffer to store the serial number (may be null)

size_t * serial_size

Holds the size of the serial field (may be null)

unsigned int * critical

will be non-zero if the extension is marked as critical (may be null)


This function will return the X.509 authority key identifier when stored as a general name (authorityCertIssuer)  and serial number.

Because more than one general names might be stored
seq can be used as a counter to request them all until  GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE is returned.


On success, GNUTLS_E_SUCCESS (0) is returned, GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE if the extension is not present, otherwise a negative error value.



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See Also

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3.6.9 gnutls