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crypto: testmgr - create struct aead_extra_tests_ctx 

In preparation for adding inauthentic input fuzz tests, which don't
require that a generic implementation of the algorithm be available,
refactor test_aead_vs_generic_impl() so that instead there's a
higher-level function test_aead_extra() which initializes a struct
aead_extra_tests_ctx and then calls test_aead_vs_generic_impl() with a
pointer to that struct.

As a bonus, this reduces stack usage.

Also switch from crypto_aead_alg(tfm)->maxauthsize to
crypto_aead_maxauthsize(), now that the latter is available in
<crypto/aead.h>.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Eric Biggers 2019-12-01 13:53:29 -08:00 committed by Herbert Xu
parent fd8c37c72d
commit 2ea915054c
1 changed files with 99 additions and 71 deletions
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170
crypto/testmgr.c
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@ -2111,6 +2111,22 @@ static int test_aead_vec(const char *driver, int enc,
}
#ifdef CONFIG_CRYPTO_MANAGER_EXTRA_TESTS
struct aead_extra_tests_ctx {
struct aead_request *req;
struct crypto_aead *tfm;
const char *driver;
const struct alg_test_desc *test_desc;
struct cipher_test_sglists *tsgls;
unsigned int maxdatasize;
unsigned int maxkeysize;
struct aead_testvec vec;
char vec_name[64];
char cfgname[TESTVEC_CONFIG_NAMELEN];
struct testvec_config cfg;
};
/*
* Generate an AEAD test vector from the given implementation.
* Assumes the buffers in 'vec' were already allocated.
@ -2123,7 +2139,7 @@ static void generate_random_aead_testvec(struct aead_request *req,
{
struct crypto_aead *tfm = crypto_aead_reqtfm(req);
const unsigned int ivsize = crypto_aead_ivsize(tfm);
unsigned int maxauthsize = crypto_aead_alg(tfm)->maxauthsize;
const unsigned int maxauthsize = crypto_aead_maxauthsize(tfm);
unsigned int authsize;
unsigned int total_len;
int i;
@ -2192,35 +2208,21 @@ done:
}
/*
* Test the AEAD algorithm represented by @req against the corresponding generic
* implementation, if one is available.
* Test the AEAD algorithm against the corresponding generic implementation, if
* one is available.
*/
static int test_aead_vs_generic_impl(const char *driver,
const struct alg_test_desc *test_desc,
struct aead_request *req,
struct cipher_test_sglists *tsgls)
static int test_aead_vs_generic_impl(struct aead_extra_tests_ctx *ctx)
{
struct crypto_aead *tfm = crypto_aead_reqtfm(req);
const unsigned int ivsize = crypto_aead_ivsize(tfm);
const unsigned int maxauthsize = crypto_aead_alg(tfm)->maxauthsize;
const unsigned int blocksize = crypto_aead_blocksize(tfm);
const unsigned int maxdatasize = (2 * PAGE_SIZE) - TESTMGR_POISON_LEN;
struct crypto_aead *tfm = ctx->tfm;
const char *algname = crypto_aead_alg(tfm)->base.cra_name;
const char *generic_driver = test_desc->generic_driver;
const char *driver = ctx->driver;
const char *generic_driver = ctx->test_desc->generic_driver;
char _generic_driver[CRYPTO_MAX_ALG_NAME];
struct crypto_aead *generic_tfm = NULL;
struct aead_request *generic_req = NULL;
unsigned int maxkeysize;
unsigned int i;
struct aead_testvec vec = { 0 };
char vec_name[64];
struct testvec_config *cfg;
char cfgname[TESTVEC_CONFIG_NAMELEN];
int err;
if (noextratests)
return 0;
if (!generic_driver) { /* Use default naming convention? */
err = build_generic_driver_name(algname, _generic_driver);
if (err)
@ -2244,12 +2246,6 @@ static int test_aead_vs_generic_impl(const char *driver,
return err;
}
cfg = kzalloc(sizeof(*cfg), GFP_KERNEL);
if (!cfg) {
err = -ENOMEM;
goto out;
}
generic_req = aead_request_alloc(generic_tfm, GFP_KERNEL);
if (!generic_req) {
err = -ENOMEM;
@ -2258,24 +2254,27 @@ static int test_aead_vs_generic_impl(const char *driver,
/* Check the algorithm properties for consistency. */
if (maxauthsize != crypto_aead_alg(generic_tfm)->maxauthsize) {
if (crypto_aead_maxauthsize(tfm) !=
crypto_aead_maxauthsize(generic_tfm)) {
pr_err("alg: aead: maxauthsize for %s (%u) doesn't match generic impl (%u)\n",
driver, maxauthsize,
crypto_aead_alg(generic_tfm)->maxauthsize);
driver, crypto_aead_maxauthsize(tfm),
crypto_aead_maxauthsize(generic_tfm));
err = -EINVAL;
goto out;
}
if (ivsize != crypto_aead_ivsize(generic_tfm)) {
if (crypto_aead_ivsize(tfm) != crypto_aead_ivsize(generic_tfm)) {
pr_err("alg: aead: ivsize for %s (%u) doesn't match generic impl (%u)\n",
driver, ivsize, crypto_aead_ivsize(generic_tfm));
driver, crypto_aead_ivsize(tfm),
crypto_aead_ivsize(generic_tfm));
err = -EINVAL;
goto out;
}
if (blocksize != crypto_aead_blocksize(generic_tfm)) {
if (crypto_aead_blocksize(tfm) != crypto_aead_blocksize(generic_tfm)) {
pr_err("alg: aead: blocksize for %s (%u) doesn't match generic impl (%u)\n",
driver, blocksize, crypto_aead_blocksize(generic_tfm));
driver, crypto_aead_blocksize(tfm),
crypto_aead_blocksize(generic_tfm));
err = -EINVAL;
goto out;
}
@ -2284,35 +2283,22 @@ static int test_aead_vs_generic_impl(const char *driver,
* Now generate test vectors using the generic implementation, and test
* the other implementation against them.
*/
maxkeysize = 0;
for (i = 0; i < test_desc->suite.aead.count; i++)
maxkeysize = max_t(unsigned int, maxkeysize,
test_desc->suite.aead.vecs[i].klen);
vec.key = kmalloc(maxkeysize, GFP_KERNEL);
vec.iv = kmalloc(ivsize, GFP_KERNEL);
vec.assoc = kmalloc(maxdatasize, GFP_KERNEL);
vec.ptext = kmalloc(maxdatasize, GFP_KERNEL);
vec.ctext = kmalloc(maxdatasize, GFP_KERNEL);
if (!vec.key || !vec.iv || !vec.assoc || !vec.ptext || !vec.ctext) {
err = -ENOMEM;
goto out;
}
for (i = 0; i < fuzz_iterations * 8; i++) {
generate_random_aead_testvec(generic_req, &vec,
maxkeysize, maxdatasize,
vec_name, sizeof(vec_name));
generate_random_testvec_config(cfg, cfgname, sizeof(cfgname));
err = test_aead_vec_cfg(driver, ENCRYPT, &vec, vec_name, cfg,
req, tsgls);
generate_random_aead_testvec(generic_req, &ctx->vec,
ctx->maxkeysize, ctx->maxdatasize,
ctx->vec_name,
sizeof(ctx->vec_name));
generate_random_testvec_config(&ctx->cfg, ctx->cfgname,
sizeof(ctx->cfgname));
err = test_aead_vec_cfg(driver, ENCRYPT, &ctx->vec,
ctx->vec_name, &ctx->cfg,
ctx->req, ctx->tsgls);
if (err)
goto out;
if (vec.crypt_error == 0) {
err = test_aead_vec_cfg(driver, DECRYPT, &vec, vec_name,
cfg, req, tsgls);
if (ctx->vec.crypt_error == 0) {
err = test_aead_vec_cfg(driver, DECRYPT, &ctx->vec,
ctx->vec_name, &ctx->cfg,
ctx->req, ctx->tsgls);
if (err)
goto out;
}
@ -2320,21 +2306,63 @@ static int test_aead_vs_generic_impl(const char *driver,
}
err = 0;
out:
kfree(cfg);
kfree(vec.key);
kfree(vec.iv);
kfree(vec.assoc);
kfree(vec.ptext);
kfree(vec.ctext);
crypto_free_aead(generic_tfm);
aead_request_free(generic_req);
return err;
}
static int test_aead_extra(const char *driver,
const struct alg_test_desc *test_desc,
struct aead_request *req,
struct cipher_test_sglists *tsgls)
{
struct aead_extra_tests_ctx *ctx;
unsigned int i;
int err;
if (noextratests)
return 0;
ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
if (!ctx)
return -ENOMEM;
ctx->req = req;
ctx->tfm = crypto_aead_reqtfm(req);
ctx->driver = driver;
ctx->test_desc = test_desc;
ctx->tsgls = tsgls;
ctx->maxdatasize = (2 * PAGE_SIZE) - TESTMGR_POISON_LEN;
ctx->maxkeysize = 0;
for (i = 0; i < test_desc->suite.aead.count; i++)
ctx->maxkeysize = max_t(unsigned int, ctx->maxkeysize,
test_desc->suite.aead.vecs[i].klen);
ctx->vec.key = kmalloc(ctx->maxkeysize, GFP_KERNEL);
ctx->vec.iv = kmalloc(crypto_aead_ivsize(ctx->tfm), GFP_KERNEL);
ctx->vec.assoc = kmalloc(ctx->maxdatasize, GFP_KERNEL);
ctx->vec.ptext = kmalloc(ctx->maxdatasize, GFP_KERNEL);
ctx->vec.ctext = kmalloc(ctx->maxdatasize, GFP_KERNEL);
if (!ctx->vec.key || !ctx->vec.iv || !ctx->vec.assoc ||
!ctx->vec.ptext || !ctx->vec.ctext) {
err = -ENOMEM;
goto out;
}
err = test_aead_vs_generic_impl(ctx);
out:
kfree(ctx->vec.key);
kfree(ctx->vec.iv);
kfree(ctx->vec.assoc);
kfree(ctx->vec.ptext);
kfree(ctx->vec.ctext);
kfree(ctx);
return err;
}
#else /* !CONFIG_CRYPTO_MANAGER_EXTRA_TESTS */
static int test_aead_vs_generic_impl(const char *driver,
const struct alg_test_desc *test_desc,
struct aead_request *req,
struct cipher_test_sglists *tsgls)
static int test_aead_extra(const char *driver,
const struct alg_test_desc *test_desc,
struct aead_request *req,
struct cipher_test_sglists *tsgls)
{
return 0;
}
@ -2403,7 +2431,7 @@ static int alg_test_aead(const struct alg_test_desc *desc, const char *driver,
if (err)
goto out;
err = test_aead_vs_generic_impl(driver, desc, req, tsgls);
err = test_aead_extra(driver, desc, req, tsgls);
out:
free_cipher_test_sglists(tsgls);
aead_request_free(req);