int gnutls_x509_crt_get_subject_key_id(gnutls_x509_crt_t cert, void * ret, size_t * ret_size, unsigned int * critical);
- gnutls_x509_crt_t cert
should contain a gnutls_x509_crt_t type
- void * ret
The place where the identifier will be copied
- size_t * ret_size
Holds the size of the result field.
- unsigned int * critical
will be non-zero if the extension is marked as critical (may be null)
This function will return the X.509v3 certificate's subject key identifier. This is obtained by the X.509 Subject Key identifier extension field (220.127.116.11).
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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