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| author | Kamil Konieczny <k.konieczny@partner.samsung.com> | 2018-01-16 17:26:13 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2018-01-25 17:10:29 +0300 |
| commit | 466d7b9f6175e4ecd409f619ff9fbbd49467ad66 (patch) | |
| tree | 842c245b900ad81257b702f471234ff8c37b9035 /crypto | |
| parent | 059bfd1171069025dc134a95f7fcce27483fba41 (diff) | |
| download | linux-466d7b9f6175e4ecd409f619ff9fbbd49467ad66.tar.xz | |
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>
Diffstat (limited to 'crypto')
| -rw-r--r-- | crypto/testmgr.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/crypto/testmgr.c b/crypto/testmgr.c index 44a85d4b3561..d5e23a142a04 100644 --- a/crypto/testmgr.c +++ b/crypto/testmgr.c @@ -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 " |