gsskrb5_extract_authtime_from_sec_context
gsskrb5_extract_authtime_from_sec_context(OM_uint32 *, gss_ctx_id_t, time_t *);
maj_stat = gsskrb5_extract_authtime_from_sec_context(&min_stat,
gsskrb5_extract_authtime_from_sec_context(OM_uint32 *, gss_ctx_id_t, krb5_timestamp *);