crypto: testmgr - replace compression known answer test

Compression implementations might return valid outputs that
do not match what specified in the test vectors.
For this reason, the testmgr might report that a compression
implementation failed the test even if the data produced
by the compressor is correct.
This implements a decompress-and-verify test for acomp
compression tests rather than a known answer test.

Signed-off-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 26 insertions, 3 deletions

diff --git a/crypto/testmgr.c b/crypto/testmgr.c
index cd075c7d8ee1..8373c727752a 100644
--- a/crypto/testmgr.c
+++ b/crypto/testmgr.c
@@ -1458,7 +1458,7 @@ static int test_acomp(struct crypto_acomp *tfm,
 {
         const char *algo = crypto_tfm_alg_driver_name(crypto_acomp_tfm(tfm));
         unsigned int i;
-        char *output;
+        char *output, *decomp_out;
         int ret;
         struct scatterlist src, dst;
         struct acomp_req *req;
@@ -1468,6 +1468,12 @@ static int test_acomp(struct crypto_acomp *tfm,
         if (!output)
                 return -ENOMEM;
 
+        decomp_out = kmalloc(COMP_BUF_SIZE, GFP_KERNEL);
+        if (!decomp_out) {
+                kfree(output);
+                return -ENOMEM;
+        }
+
         for (i = 0; i < ctcount; i++) {
                 unsigned int dlen = COMP_BUF_SIZE;
                 int ilen = ctemplate[i].inlen;
@@ -1506,7 +1512,23 @@ static int test_acomp(struct crypto_acomp *tfm,
                         goto out;
                 }
 
-                if (req->dlen != ctemplate[i].outlen) {
+                ilen = req->dlen;
+                dlen = COMP_BUF_SIZE;
+                sg_init_one(&src, output, ilen);
+                sg_init_one(&dst, decomp_out, dlen);
+                init_completion(&result.completion);
+                acomp_request_set_params(req, &src, &dst, ilen, dlen);
+
+                ret = wait_async_op(&result, crypto_acomp_decompress(req));
+                if (ret) {
+                        pr_err("alg: acomp: compression failed on test %d for %s: ret=%d\n",
+                               i + 1, algo, -ret);
+                        kfree(input_vec);
+                        acomp_request_free(req);
+                        goto out;
+                }
+
+                if (req->dlen != ctemplate[i].inlen) {
                         pr_err("alg: acomp: Compression test %d failed for %s: output len = %d\n",
                                i + 1, algo, req->dlen);
                         ret = -EINVAL;
@@ -1515,7 +1537,7 @@ static int test_acomp(struct crypto_acomp *tfm,
                         goto out;
                 }
 
-                if (memcmp(output, ctemplate[i].output, req->dlen)) {
+                if (memcmp(input_vec, decomp_out, req->dlen)) {
                         pr_err("alg: acomp: Compression test %d failed for %s\n",
                                i + 1, algo);
                         hexdump(output, req->dlen);
@@ -1593,6 +1615,7 @@ static int test_acomp(struct crypto_acomp *tfm,
         ret = 0;
 
 out:
+        kfree(decomp_out);
         kfree(output);
         return ret;
 }