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crypto: testmgr - Add infrastructure for ansi_cprng self-tests

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Add some necessary infrastructure to make it possible to run
self-tests for ansi_cprng. The bits are likely very specific
to the ANSI X9.31 CPRNG in AES mode, and thus perhaps should
be named more specifically if/when we grow additional CPRNG
support...

Successfully tested against the cryptodev-2.6 tree and a
Red Hat Enterprise Linux 5.x kernel with the follow-on
patch that adds the actual test vectors.

Signed-off-by: Jarod Wilson <jarod@redhat.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Jarod Wilson 2009-05-04 19:44:50 +08:00 committed by Herbert Xu
parent 5d667322a2
commit 7647d6ce20
2 changed files with 101 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

89
crypto/testmgr.c
View file

@ -19,6 +19,7 @@
#include <linux/scatterlist.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <crypto/rng.h>
#include "internal.h"
#include "testmgr.h"
@ -84,6 +85,11 @@ struct hash_test_suite {
unsigned int count;
};
struct cprng_test_suite {
struct cprng_testvec *vecs;
unsigned int count;
};
struct alg_test_desc {
const char *alg;
int (*test)(const struct alg_test_desc *desc, const char *driver,
@ -95,6 +101,7 @@ struct alg_test_desc {
struct comp_test_suite comp;
struct pcomp_test_suite pcomp;
struct hash_test_suite hash;
struct cprng_test_suite cprng;
} suite;
};
@ -1089,6 +1096,68 @@ static int test_pcomp(struct crypto_pcomp *tfm,
return 0;
}
static int test_cprng(struct crypto_rng *tfm, struct cprng_testvec *template,
unsigned int tcount)
{
const char *algo = crypto_tfm_alg_driver_name(crypto_rng_tfm(tfm));
int err, i, j, seedsize;
u8 *seed;
char result[32];
seedsize = crypto_rng_seedsize(tfm);
seed = kmalloc(seedsize, GFP_KERNEL);
if (!seed) {
printk(KERN_ERR "alg: cprng: Failed to allocate seed space "
"for %s\n", algo);
return -ENOMEM;
}
for (i = 0; i < tcount; i++) {
memset(result, 0, 32);
memcpy(seed, template[i].v, template[i].vlen);
memcpy(seed + template[i].vlen, template[i].key,
template[i].klen);
memcpy(seed + template[i].vlen + template[i].klen,
template[i].dt, template[i].dtlen);
err = crypto_rng_reset(tfm, seed, seedsize);
if (err) {
printk(KERN_ERR "alg: cprng: Failed to reset rng "
"for %s\n", algo);
goto out;
}
for (j = 0; j < template[i].loops; j++) {
err = crypto_rng_get_bytes(tfm, result,
template[i].rlen);
if (err != template[i].rlen) {
printk(KERN_ERR "alg: cprng: Failed to obtain "
"the correct amount of random data for "
"%s (requested %d, got %d)\n", algo,
template[i].rlen, err);
goto out;
}
}
err = memcmp(result, template[i].result,
template[i].rlen);
if (err) {
printk(KERN_ERR "alg: cprng: Test %d failed for %s\n",
i, algo);
hexdump(result, template[i].rlen);
err = -EINVAL;
goto out;
}
}
out:
kfree(seed);
return err;
}
static int alg_test_aead(const struct alg_test_desc *desc, const char *driver,
u32 type, u32 mask)
{
@ -1288,6 +1357,26 @@ out:
return err;
}
static int alg_test_cprng(const struct alg_test_desc *desc, const char *driver,
u32 type, u32 mask)
{
struct crypto_rng *rng;
int err;
rng = crypto_alloc_rng(driver, type, mask);
if (IS_ERR(rng)) {
printk(KERN_ERR "alg: cprng: Failed to load transform for %s: "
"%ld\n", driver, PTR_ERR(rng));
return PTR_ERR(rng);
}
err = test_cprng(rng, desc->suite.cprng.vecs, desc->suite.cprng.count);
crypto_free_rng(rng);
return err;
}
/* Please keep this list sorted by algorithm name. */
static const struct alg_test_desc alg_test_descs[] = {
{

12
crypto/testmgr.h
View file

@ -70,6 +70,18 @@ struct aead_testvec {
unsigned short rlen;
};
struct cprng_testvec {
char *key;
char *dt;
char *v;
char *result;
unsigned char klen;
unsigned short dtlen;
unsigned short vlen;
unsigned short rlen;
unsigned short loops;
};
static char zeroed_string[48];
/*