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crypto: testmgr - Add infrastructure for ansi_cprng self-tests
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>
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2 changed files with 101 additions and 0 deletions
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@ -19,6 +19,7 @@
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#include <linux/scatterlist.h>
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#include <linux/slab.h>
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#include <linux/string.h>
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#include <crypto/rng.h>
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#include "internal.h"
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#include "testmgr.h"
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@ -84,6 +85,11 @@ struct hash_test_suite {
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unsigned int count;
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};
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struct cprng_test_suite {
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struct cprng_testvec *vecs;
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unsigned int count;
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};
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struct alg_test_desc {
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const char *alg;
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int (*test)(const struct alg_test_desc *desc, const char *driver,
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@ -95,6 +101,7 @@ struct alg_test_desc {
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struct comp_test_suite comp;
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struct pcomp_test_suite pcomp;
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struct hash_test_suite hash;
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struct cprng_test_suite cprng;
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} suite;
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};
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@ -1089,6 +1096,68 @@ static int test_pcomp(struct crypto_pcomp *tfm,
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return 0;
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}
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static int test_cprng(struct crypto_rng *tfm, struct cprng_testvec *template,
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unsigned int tcount)
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{
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const char *algo = crypto_tfm_alg_driver_name(crypto_rng_tfm(tfm));
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int err, i, j, seedsize;
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u8 *seed;
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char result[32];
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seedsize = crypto_rng_seedsize(tfm);
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seed = kmalloc(seedsize, GFP_KERNEL);
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if (!seed) {
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printk(KERN_ERR "alg: cprng: Failed to allocate seed space "
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"for %s\n", algo);
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return -ENOMEM;
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}
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for (i = 0; i < tcount; i++) {
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memset(result, 0, 32);
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memcpy(seed, template[i].v, template[i].vlen);
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memcpy(seed + template[i].vlen, template[i].key,
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template[i].klen);
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memcpy(seed + template[i].vlen + template[i].klen,
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template[i].dt, template[i].dtlen);
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err = crypto_rng_reset(tfm, seed, seedsize);
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if (err) {
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printk(KERN_ERR "alg: cprng: Failed to reset rng "
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"for %s\n", algo);
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goto out;
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}
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for (j = 0; j < template[i].loops; j++) {
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err = crypto_rng_get_bytes(tfm, result,
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template[i].rlen);
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if (err != template[i].rlen) {
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printk(KERN_ERR "alg: cprng: Failed to obtain "
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"the correct amount of random data for "
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"%s (requested %d, got %d)\n", algo,
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template[i].rlen, err);
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goto out;
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}
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}
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err = memcmp(result, template[i].result,
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template[i].rlen);
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if (err) {
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printk(KERN_ERR "alg: cprng: Test %d failed for %s\n",
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i, algo);
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hexdump(result, template[i].rlen);
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err = -EINVAL;
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goto out;
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}
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}
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out:
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kfree(seed);
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return err;
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}
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static int alg_test_aead(const struct alg_test_desc *desc, const char *driver,
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u32 type, u32 mask)
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{
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@ -1288,6 +1357,26 @@ out:
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return err;
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}
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static int alg_test_cprng(const struct alg_test_desc *desc, const char *driver,
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u32 type, u32 mask)
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{
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struct crypto_rng *rng;
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int err;
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rng = crypto_alloc_rng(driver, type, mask);
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if (IS_ERR(rng)) {
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printk(KERN_ERR "alg: cprng: Failed to load transform for %s: "
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"%ld\n", driver, PTR_ERR(rng));
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return PTR_ERR(rng);
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}
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err = test_cprng(rng, desc->suite.cprng.vecs, desc->suite.cprng.count);
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crypto_free_rng(rng);
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return err;
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}
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/* Please keep this list sorted by algorithm name. */
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static const struct alg_test_desc alg_test_descs[] = {
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{
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@ -70,6 +70,18 @@ struct aead_testvec {
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unsigned short rlen;
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};
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struct cprng_testvec {
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char *key;
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char *dt;
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char *v;
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char *result;
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unsigned char klen;
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unsigned short dtlen;
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unsigned short vlen;
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unsigned short rlen;
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unsigned short loops;
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};
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static char zeroed_string[48];
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/*
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