static inline err_status_t
crypto_kernel_do_load_cipher_type(cipher_type_t *new_ct, cipher_type_id_t id,
int replace) {
kernel_cipher_type_t *ctype, *new_ctype;
err_status_t status;
/* defensive coding */
if (new_ct == NULL)
return err_status_bad_param;
if (new_ct->id != id)
return err_status_bad_param;
/* check cipher type by running self-test */
status = cipher_type_self_test(new_ct);
if (status) {
return status;
}
/* walk down list, checking if this type is in the list already */
ctype = crypto_kernel.cipher_type_list;
while (ctype != NULL) {
if (id == ctype->id) {
if (!replace)
return err_status_bad_param;
status = cipher_type_test(new_ct, ctype->cipher_type->test_data);
if (status)
return status;
new_ctype = ctype;
break;
}
else if (new_ct == ctype->cipher_type)
return err_status_bad_param;
ctype = ctype->next;
}
/* if not found, put new_ct at the head of the list */
if (ctype == NULL) {
/* allocate memory */
new_ctype = (kernel_cipher_type_t *) crypto_alloc(sizeof(kernel_cipher_type_t));
if (new_ctype == NULL)
return err_status_alloc_fail;
new_ctype->next = crypto_kernel.cipher_type_list;
/* set head of list to new cipher type */
crypto_kernel.cipher_type_list = new_ctype;
}
/* set fields */
new_ctype->cipher_type = new_ct;
new_ctype->id = id;
/* load debug module, if there is one present */
if (new_ct->debug != NULL)
crypto_kernel_load_debug_module(new_ct->debug);
/* we could check for errors here */
return err_status_ok;
}
err_status_t
cipher_type_self_test(const cipher_type_t *ct) {
return cipher_type_test(ct, ct->test_data);
}
