linux-stable/crypto/algboss.c
Herbert Xu 6fe4a28d88 crypto: testmgr - Test skciphers with no IVs
As it is an skcipher with no IV escapes testing altogether because
we only test givcipher objects.  This patch fixes the bypass logic
to test these algorithms.

Conversely, we're currently testing nivaead algorithms with IVs,
which would have deadlocked had it not been for the fact that no
nivaead algorithms have any test vectors.  This patch also fixes
that case.

Both fixes are ugly as hell, but this ugliness should hopefully
disappear once we move them into the per-type code (i.e., the
AEAD test would live in aead.c and the skcipher stuff in ablkcipher.c).

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2009-02-18 21:41:29 +08:00

312 lines
6.3 KiB
C

/*
* Create default crypto algorithm instances.
*
* Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
*/
#include <crypto/internal/aead.h>
#include <linux/ctype.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/kthread.h>
#include <linux/module.h>
#include <linux/notifier.h>
#include <linux/rtnetlink.h>
#include <linux/sched.h>
#include <linux/string.h>
#include "internal.h"
struct cryptomgr_param {
struct rtattr *tb[CRYPTO_MAX_ATTRS + 2];
struct {
struct rtattr attr;
struct crypto_attr_type data;
} type;
union {
struct rtattr attr;
struct {
struct rtattr attr;
struct crypto_attr_alg data;
} alg;
struct {
struct rtattr attr;
struct crypto_attr_u32 data;
} nu32;
} attrs[CRYPTO_MAX_ATTRS];
char larval[CRYPTO_MAX_ALG_NAME];
char template[CRYPTO_MAX_ALG_NAME];
u32 otype;
u32 omask;
};
struct crypto_test_param {
char driver[CRYPTO_MAX_ALG_NAME];
char alg[CRYPTO_MAX_ALG_NAME];
u32 type;
};
static int cryptomgr_probe(void *data)
{
struct cryptomgr_param *param = data;
struct crypto_template *tmpl;
struct crypto_instance *inst;
int err;
tmpl = crypto_lookup_template(param->template);
if (!tmpl)
goto err;
do {
inst = tmpl->alloc(param->tb);
if (IS_ERR(inst))
err = PTR_ERR(inst);
else if ((err = crypto_register_instance(tmpl, inst)))
tmpl->free(inst);
} while (err == -EAGAIN && !signal_pending(current));
crypto_tmpl_put(tmpl);
if (err)
goto err;
out:
kfree(param);
module_put_and_exit(0);
err:
crypto_larval_error(param->larval, param->otype, param->omask);
goto out;
}
static int cryptomgr_schedule_probe(struct crypto_larval *larval)
{
struct task_struct *thread;
struct cryptomgr_param *param;
const char *name = larval->alg.cra_name;
const char *p;
unsigned int len;
int i;
if (!try_module_get(THIS_MODULE))
goto err;
param = kzalloc(sizeof(*param), GFP_KERNEL);
if (!param)
goto err_put_module;
for (p = name; isalnum(*p) || *p == '-' || *p == '_'; p++)
;
len = p - name;
if (!len || *p != '(')
goto err_free_param;
memcpy(param->template, name, len);
i = 0;
for (;;) {
int notnum = 0;
name = ++p;
len = 0;
for (; isalnum(*p) || *p == '-' || *p == '_'; p++)
notnum |= !isdigit(*p);
if (*p == '(') {
int recursion = 0;
for (;;) {
if (!*++p)
goto err_free_param;
if (*p == '(')
recursion++;
else if (*p == ')' && !recursion--)
break;
}
notnum = 1;
p++;
}
len = p - name;
if (!len)
goto err_free_param;
if (notnum) {
param->attrs[i].alg.attr.rta_len =
sizeof(param->attrs[i].alg);
param->attrs[i].alg.attr.rta_type = CRYPTOA_ALG;
memcpy(param->attrs[i].alg.data.name, name, len);
} else {
param->attrs[i].nu32.attr.rta_len =
sizeof(param->attrs[i].nu32);
param->attrs[i].nu32.attr.rta_type = CRYPTOA_U32;
param->attrs[i].nu32.data.num =
simple_strtol(name, NULL, 0);
}
param->tb[i + 1] = &param->attrs[i].attr;
i++;
if (i >= CRYPTO_MAX_ATTRS)
goto err_free_param;
if (*p == ')')
break;
if (*p != ',')
goto err_free_param;
}
if (!i)
goto err_free_param;
param->tb[i + 1] = NULL;
param->type.attr.rta_len = sizeof(param->type);
param->type.attr.rta_type = CRYPTOA_TYPE;
param->type.data.type = larval->alg.cra_flags & ~CRYPTO_ALG_TESTED;
param->type.data.mask = larval->mask & ~CRYPTO_ALG_TESTED;
param->tb[0] = &param->type.attr;
param->otype = larval->alg.cra_flags;
param->omask = larval->mask;
memcpy(param->larval, larval->alg.cra_name, CRYPTO_MAX_ALG_NAME);
thread = kthread_run(cryptomgr_probe, param, "cryptomgr_probe");
if (IS_ERR(thread))
goto err_free_param;
return NOTIFY_STOP;
err_free_param:
kfree(param);
err_put_module:
module_put(THIS_MODULE);
err:
return NOTIFY_OK;
}
static int cryptomgr_test(void *data)
{
struct crypto_test_param *param = data;
u32 type = param->type;
int err = 0;
if (type & CRYPTO_ALG_TESTED)
goto skiptest;
err = alg_test(param->driver, param->alg, type, CRYPTO_ALG_TESTED);
skiptest:
crypto_alg_tested(param->driver, err);
kfree(param);
module_put_and_exit(0);
}
static int cryptomgr_schedule_test(struct crypto_alg *alg)
{
struct task_struct *thread;
struct crypto_test_param *param;
u32 type;
if (!try_module_get(THIS_MODULE))
goto err;
param = kzalloc(sizeof(*param), GFP_KERNEL);
if (!param)
goto err_put_module;
memcpy(param->driver, alg->cra_driver_name, sizeof(param->driver));
memcpy(param->alg, alg->cra_name, sizeof(param->alg));
type = alg->cra_flags;
/* This piece of crap needs to disappear into per-type test hooks. */
if ((!((type ^ CRYPTO_ALG_TYPE_BLKCIPHER) &
CRYPTO_ALG_TYPE_BLKCIPHER_MASK) && !(type & CRYPTO_ALG_GENIV) &&
((alg->cra_flags & CRYPTO_ALG_TYPE_MASK) ==
CRYPTO_ALG_TYPE_BLKCIPHER ? alg->cra_blkcipher.ivsize :
alg->cra_ablkcipher.ivsize)) ||
(!((type ^ CRYPTO_ALG_TYPE_AEAD) & CRYPTO_ALG_TYPE_MASK) &&
alg->cra_type == &crypto_nivaead_type && alg->cra_aead.ivsize))
type |= CRYPTO_ALG_TESTED;
param->type = type;
thread = kthread_run(cryptomgr_test, param, "cryptomgr_test");
if (IS_ERR(thread))
goto err_free_param;
return NOTIFY_STOP;
err_free_param:
kfree(param);
err_put_module:
module_put(THIS_MODULE);
err:
return NOTIFY_OK;
}
static int cryptomgr_notify(struct notifier_block *this, unsigned long msg,
void *data)
{
switch (msg) {
case CRYPTO_MSG_ALG_REQUEST:
return cryptomgr_schedule_probe(data);
case CRYPTO_MSG_ALG_REGISTER:
return cryptomgr_schedule_test(data);
}
return NOTIFY_DONE;
}
static struct notifier_block cryptomgr_notifier = {
.notifier_call = cryptomgr_notify,
};
static int __init cryptomgr_init(void)
{
int err;
err = testmgr_init();
if (err)
return err;
err = crypto_register_notifier(&cryptomgr_notifier);
if (err)
goto free_testmgr;
return 0;
free_testmgr:
testmgr_exit();
return err;
}
static void __exit cryptomgr_exit(void)
{
int err = crypto_unregister_notifier(&cryptomgr_notifier);
BUG_ON(err);
testmgr_exit();
}
subsys_initcall(cryptomgr_init);
module_exit(cryptomgr_exit);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Crypto Algorithm Manager");