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>

1 files changed, 50 insertions, 1 deletions

diff --git a/crypto/testmgr.c b/crypto/testmgr.c
index 308d9cffdc46..67dce77d49d5 100644
--- 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,