crypto: crc32c - Test descriptor context format

This patch adds a test for the requirement that all crc32c algorithms
shall store the partial result in the first four bytes of the descriptor
context.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

diff --git a/crypto/testmgr.c b/crypto/testmgr.c
index 308d9cf..67dce77 100644 (file)
--- a/crypto/testmgr.c
+++ b/crypto/testmgr.c
@@ -1010,6 +1010,55 @@ static int alg_test_hash(const struct alg_test_desc *desc, const char *driver,
        return err;
 }
 
+static int alg_test_crc32c(const struct alg_test_desc *desc,
+                          const char *driver, u32 type, u32 mask)
+{
+       struct crypto_shash *tfm;
+       u32 val;
+       int err;
+
+       err = alg_test_hash(desc, driver, type, mask);
+       if (err)
+               goto out;
+
+       tfm = crypto_alloc_shash(driver, type, mask);
+       if (IS_ERR(tfm)) {
+               printk(KERN_ERR "alg: crc32c: Failed to load transform for %s: "
+                      "%ld\n", driver, PTR_ERR(tfm));
+               err = PTR_ERR(tfm);
+               goto out;
+       }
+
+       do {
+               struct {
+                       struct shash_desc shash;
+                       char ctx[crypto_shash_descsize(tfm)];
+               } sdesc;
+
+               sdesc.shash.tfm = tfm;
+               sdesc.shash.flags = 0;
+
+               *(u32 *)sdesc.ctx = le32_to_cpu(420553207);
+               err = crypto_shash_final(&sdesc.shash, (u8 *)&val);
+               if (err) {
+                       printk(KERN_ERR "alg: crc32c: Operation failed for "
+                              "%s: %d\n", driver, err);
+                       break;
+               }
+
+               if (val != ~420553207) {
+                       printk(KERN_ERR "alg: crc32c: Test failed for %s: "
+                              "%d\n", driver, val);
+                       err = -EINVAL;
+               }
+       } while (0);
+
+       crypto_free_shash(tfm);
+
+out:
+       return err;
+}
+
 /* Please keep this list sorted by algorithm name. */
 static const struct alg_test_desc alg_test_descs[] = {
        {
@@ -1134,7 +1183,7 @@ static const struct alg_test_desc alg_test_descs[] = {
                }
        }, {
                .alg = "crc32c",
-               .test = alg_test_hash,
+               .test = alg_test_crc32c,
                .suite = {
                        .hash = {
                                .vecs = crc32c_tv_template,