crypto: testmgr - test skciphers with unaligned buffers

This patch adds unaligned buffer tests for blkciphers.

The first new test is with one byte offset and the second test checks if
cra_alignmask for driver is big enough; for example, for testing a case
where cra_alignmask is set to 7, but driver really needs buffers to be
aligned to 16 bytes.

Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 29 insertions, 4 deletions

diff --git a/crypto/testmgr.c b/crypto/testmgr.c
index a81c154e5d85..8bd185f068b6 100644
--- a/crypto/testmgr.c
+++ b/crypto/testmgr.c
@@ -820,7 +820,7 @@ out_nobuf:
 
 static int __test_skcipher(struct crypto_ablkcipher *tfm, int enc,
                            struct cipher_testvec *template, unsigned int tcount,
-                           const bool diff_dst)
+                           const bool diff_dst, const int align_offset)
 {
         const char *algo =
                 crypto_tfm_alg_driver_name(crypto_ablkcipher_tfm(tfm));
@@ -876,10 +876,12 @@ static int __test_skcipher(struct crypto_ablkcipher *tfm, int enc,
                         j++;
 
                         ret = -EINVAL;
-                        if (WARN_ON(template[i].ilen > PAGE_SIZE))
+                        if (WARN_ON(align_offset + template[i].ilen >
+                                    PAGE_SIZE))
                                 goto out;
 
                         data = xbuf[0];
+                        data += align_offset;
                         memcpy(data, template[i].input, template[i].ilen);
 
                         crypto_ablkcipher_clear_flags(tfm, ~0);
@@ -900,6 +902,7 @@ static int __test_skcipher(struct crypto_ablkcipher *tfm, int enc,
                         sg_init_one(&sg[0], data, template[i].ilen);
                         if (diff_dst) {
                                 data = xoutbuf[0];
+                                data += align_offset;
                                 sg_init_one(&sgout[0], data, template[i].ilen);
                         }
 
@@ -941,6 +944,9 @@ static int __test_skcipher(struct crypto_ablkcipher *tfm, int enc,
 
         j = 0;
         for (i = 0; i < tcount; i++) {
+                /* alignment tests are only done with continuous buffers */
+                if (align_offset != 0)
+                        break;
 
                 if (template[i].iv)
                         memcpy(iv, template[i].iv, MAX_IVLEN);
@@ -1075,15 +1081,34 @@ out_nobuf:
 static int test_skcipher(struct crypto_ablkcipher *tfm, int enc,
                          struct cipher_testvec *template, unsigned int tcount)
 {
+        unsigned int alignmask;
         int ret;
 
         /* test 'dst == src' case */
-        ret = __test_skcipher(tfm, enc, template, tcount, false);
+        ret = __test_skcipher(tfm, enc, template, tcount, false, 0);
         if (ret)
                 return ret;
 
         /* test 'dst != src' case */
-        return __test_skcipher(tfm, enc, template, tcount, true);
+        ret = __test_skcipher(tfm, enc, template, tcount, true, 0);
+        if (ret)
+                return ret;
+
+        /* test unaligned buffers, check with one byte offset */
+        ret = __test_skcipher(tfm, enc, template, tcount, true, 1);
+        if (ret)
+                return ret;
+
+        alignmask = crypto_tfm_alg_alignmask(&tfm->base);
+        if (alignmask) {
+                /* Check if alignment mask for tfm is correctly set. */
+                ret = __test_skcipher(tfm, enc, template, tcount, true,
+                                      alignmask + 1);
+                if (ret)
+                        return ret;
+        }
+
+        return 0;
 }
 
 static int test_comp(struct crypto_comp *tfm, struct comp_testvec *ctemplate,