crypto: testmgr - Add a test case for import()/export()

Modify __test_hash() so that hash import/export can be tested
from within the kernel. The test is unconditionally done when
a struct hash_testvec has its .np > 1.

v3: make the test unconditional
v2: Leverage template[i].np as suggested by Tim Chen

Signed-off-by: Rui Wang <rui.y.wang@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 133 insertions, 0 deletions

diff --git a/crypto/testmgr.c b/crypto/testmgr.c
index cbd78c954844..cde6a2983937 100644
--- a/crypto/testmgr.c
+++ b/crypto/testmgr.c
@@ -190,6 +190,61 @@ static int wait_async_op(struct tcrypt_result *tr, int ret)
         return ret;
 }
 
+static int ahash_partial_update(struct ahash_request **preq,
+        struct crypto_ahash *tfm, struct hash_testvec *template,
+        void *hash_buff, int k, int temp, struct scatterlist *sg,
+        const char *algo, char *result, struct tcrypt_result *tresult)
+{
+        char *state;
+        struct ahash_request *req;
+        int statesize, ret = -EINVAL;
+
+        req = *preq;
+        statesize = crypto_ahash_statesize(
+                        crypto_ahash_reqtfm(req));
+        state = kmalloc(statesize, GFP_KERNEL);
+        if (!state) {
+                pr_err("alt: hash: Failed to alloc state for %s\n", algo);
+                goto out_nostate;
+        }
+        ret = crypto_ahash_export(req, state);
+        if (ret) {
+                pr_err("alt: hash: Failed to export() for %s\n", algo);
+                goto out;
+        }
+        ahash_request_free(req);
+        req = ahash_request_alloc(tfm, GFP_KERNEL);
+        if (!req) {
+                pr_err("alg: hash: Failed to alloc request for %s\n", algo);
+                goto out_noreq;
+        }
+        ahash_request_set_callback(req,
+                CRYPTO_TFM_REQ_MAY_BACKLOG,
+                tcrypt_complete, tresult);
+
+        memcpy(hash_buff, template->plaintext + temp,
+                template->tap[k]);
+        sg_init_one(&sg[0], hash_buff, template->tap[k]);
+        ahash_request_set_crypt(req, sg, result, template->tap[k]);
+        ret = crypto_ahash_import(req, state);
+        if (ret) {
+                pr_err("alg: hash: Failed to import() for %s\n", algo);
+                goto out;
+        }
+        ret = wait_async_op(tresult, crypto_ahash_update(req));
+        if (ret)
+                goto out;
+        *preq = req;
+        ret = 0;
+        goto out_noreq;
+out:
+        ahash_request_free(req);
+out_noreq:
+        kfree(state);
+out_nostate:
+        return ret;
+}
+
 static int __test_hash(struct crypto_ahash *tfm, struct hash_testvec *template,
                        unsigned int tcount, bool use_digest,
                        const int align_offset)
@@ -377,6 +432,84 @@ static int __test_hash(struct crypto_ahash *tfm, struct hash_testvec *template,
                 }
         }
 
+        /* partial update exercise */
+        j = 0;
+        for (i = 0; i < tcount; i++) {
+                /* alignment tests are only done with continuous buffers */
+                if (align_offset != 0)
+                        break;
+
+                if (template[i].np < 2)
+                        continue;
+
+                j++;
+                memset(result, 0, MAX_DIGEST_SIZE);
+
+                ret = -EINVAL;
+                hash_buff = xbuf[0];
+                memcpy(hash_buff, template[i].plaintext,
+                        template[i].tap[0]);
+                sg_init_one(&sg[0], hash_buff, template[i].tap[0]);
+
+                if (template[i].ksize) {
+                        crypto_ahash_clear_flags(tfm, ~0);
+                        if (template[i].ksize > MAX_KEYLEN) {
+                                pr_err("alg: hash: setkey failed on test %d for %s: key size %d > %d\n",
+                                        j, algo, template[i].ksize, MAX_KEYLEN);
+                                ret = -EINVAL;
+                                goto out;
+                        }
+                        memcpy(key, template[i].key, template[i].ksize);
+                        ret = crypto_ahash_setkey(tfm, key, template[i].ksize);
+                        if (ret) {
+                                pr_err("alg: hash: setkey failed on test %d for %s: ret=%d\n",
+                                        j, algo, -ret);
+                                goto out;
+                        }
+                }
+
+                ahash_request_set_crypt(req, sg, result, template[i].tap[0]);
+                ret = wait_async_op(&tresult, crypto_ahash_init(req));
+                if (ret) {
+                        pr_err("alt: hash: init failed on test %d for %s: ret=%d\n",
+                                j, algo, -ret);
+                        goto out;
+                }
+                ret = wait_async_op(&tresult, crypto_ahash_update(req));
+                if (ret) {
+                        pr_err("alt: hash: update failed on test %d for %s: ret=%d\n",
+                                j, algo, -ret);
+                        goto out;
+                }
+
+                temp = template[i].tap[0];
+                for (k = 1; k < template[i].np; k++) {
+                        ret = ahash_partial_update(&req, tfm, &template[i],
+                                hash_buff, k, temp, &sg[0], algo, result,
+                                &tresult);
+                        if (ret) {
+                                pr_err("hash: partial update failed on test %d for %s: ret=%d\n",
+                                        j, algo, -ret);
+                                goto out_noreq;
+                        }
+                        temp += template[i].tap[k];
+                }
+                ret = wait_async_op(&tresult, crypto_ahash_final(req));
+                if (ret) {
+                        pr_err("alt: hash: final failed on test %d for %s: ret=%d\n",
+                                j, algo, -ret);
+                        goto out;
+                }
+                if (memcmp(result, template[i].digest,
+                           crypto_ahash_digestsize(tfm))) {
+                        pr_err("alg: hash: Partial Test %d failed for %s\n",
+                               j, algo);
+                        hexdump(result, crypto_ahash_digestsize(tfm));
+                        ret = -EINVAL;
+                        goto out;
+                }
+        }
+
         ret = 0;
 
 out: