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crypto: testmgr - test misuse of result in ahash 

Async hash operations can use result pointer in final/finup/digest,
but not in init/update/export/import, so test it for misuse.

Signed-off-by: Kamil Konieczny <k.konieczny@partner.samsung.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Kamil Konieczny 2018-01-16 15:26:13 +01:00 committed by Herbert Xu
parent 059bfd1171
commit 466d7b9f61
1 changed files with 39 additions and 0 deletions
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39
crypto/testmgr.c
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@ -177,6 +177,18 @@ static void testmgr_free_buf(char *buf[XBUFSIZE])
free_page((unsigned long)buf[i]);
}
static int ahash_guard_result(char *result, char c, int size)
{
int i;
for (i = 0; i < size; i++) {
if (result[i] != c)
return -EINVAL;
}
return 0;
}
static int ahash_partial_update(struct ahash_request **preq,
struct crypto_ahash *tfm, const struct hash_testvec *template,
void *hash_buff, int k, int temp, struct scatterlist *sg,
@ -186,6 +198,7 @@ static int ahash_partial_update(struct ahash_request **preq,
struct ahash_request *req;
int statesize, ret = -EINVAL;
static const unsigned char guard[] = { 0x00, 0xba, 0xad, 0x00 };
int digestsize = crypto_ahash_digestsize(tfm);
req = *preq;
statesize = crypto_ahash_statesize(
@ -196,12 +209,19 @@ static int ahash_partial_update(struct ahash_request **preq,
goto out_nostate;
}
memcpy(state + statesize, guard, sizeof(guard));
memset(result, 1, digestsize);
ret = crypto_ahash_export(req, state);
WARN_ON(memcmp(state + statesize, guard, sizeof(guard)));
if (ret) {
pr_err("alg: hash: Failed to export() for %s\n", algo);
goto out;
}
ret = ahash_guard_result(result, 1, digestsize);
if (ret) {
pr_err("alg: hash: Failed, export used req->result for %s\n",
algo);
goto out;
}
ahash_request_free(req);
req = ahash_request_alloc(tfm, GFP_KERNEL);
if (!req) {
@ -221,6 +241,12 @@ static int ahash_partial_update(struct ahash_request **preq,
pr_err("alg: hash: Failed to import() for %s\n", algo);
goto out;
}
ret = ahash_guard_result(result, 1, digestsize);
if (ret) {
pr_err("alg: hash: Failed, import used req->result for %s\n",
algo);
goto out;
}
ret = crypto_wait_req(crypto_ahash_update(req), wait);
if (ret)
goto out;
@ -316,18 +342,31 @@ static int __test_hash(struct crypto_ahash *tfm,
goto out;
}
} else {
memset(result, 1, digest_size);
ret = crypto_wait_req(crypto_ahash_init(req), &wait);
if (ret) {
pr_err("alg: hash: init failed on test %d "
"for %s: ret=%d\n", j, algo, -ret);
goto out;
}
ret = ahash_guard_result(result, 1, digest_size);
if (ret) {
pr_err("alg: hash: init failed on test %d "
"for %s: used req->result\n", j, algo);
goto out;
}
ret = crypto_wait_req(crypto_ahash_update(req), &wait);
if (ret) {
pr_err("alg: hash: update failed on test %d "
"for %s: ret=%d\n", j, algo, -ret);
goto out;
}
ret = ahash_guard_result(result, 1, digest_size);
if (ret) {
pr_err("alg: hash: update failed on test %d "
"for %s: used req->result\n", j, algo);
goto out;
}
ret = crypto_wait_req(crypto_ahash_final(req), &wait);
if (ret) {
pr_err("alg: hash: final failed on test %d "