decrypt_key
krb5_keyblock decrypt_key;
decrypt_key.enctype = ENCTYPE_NULL;
decrypt_key.contents = NULL;
decrypt_key = (*auth_context)->key->keyblock;
check_valid_flag ? &decrypt_key : NULL);
&decrypt_key,
krb5_free_keyblock_contents(context, &decrypt_key);
if (!decrypt_key(enc_data, enc_data_size, key_encoding,