gnutls_x509_crt_get_subject_alt_name23

Arguments

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 * san

is the place where the alternative name will be copied to

size_t * san_size

holds the size of ret.

unsigned int * san_type

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

unsigned int * critical

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

Overview

This function will return the alternative names, contained in the given certificate. It is the same as gnutls_x509_crt_get_subject_alt_name() except for the fact that it will return the type of the alternative name in san_type even if the function fails for some reason (i.e. the buffer provided is not enough).

Returns

the alternative subject name type on success, one of the enumerated gnutls_x509_subject_alt_name_t. It will return GNUTLS_E_SHORT_MEMORY_BUFFER if san_size is not large enough to hold the value. In that case san_size will be updated with the required size. If the certificate does not have an Alternative name with the specified sequence number then GNUTLS_E_REQUESTED_DATA_NOT_AVAILABLE is returned.