[CRYPTO] users: Use crypto_hash interface instead of crypto_digest

This patch converts all remaining crypto_digest users to use the new
crypto_hash interface.

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

1 files changed, 16 insertions, 14 deletions

diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c
index 91d4081cb00e..73f8be837a45 100644
--- a/drivers/md/dm-crypt.c
+++ b/drivers/md/dm-crypt.c
@@ -122,7 +122,8 @@ static int crypt_iv_essiv_ctr(struct crypt_config *cc, struct dm_target *ti,
                               const char *opts)
 {
         struct crypto_cipher *essiv_tfm;
-        struct crypto_tfm *hash_tfm;
+        struct crypto_hash *hash_tfm;
+        struct hash_desc desc;
         struct scatterlist sg;
         unsigned int saltsize;
         u8 *salt;
@@ -134,29 +135,30 @@ static int crypt_iv_essiv_ctr(struct crypt_config *cc, struct dm_target *ti,
         }
 
         /* Hash the cipher key with the given hash algorithm */
-        hash_tfm = crypto_alloc_tfm(opts, CRYPTO_TFM_REQ_MAY_SLEEP);
-        if (hash_tfm == NULL) {
+        hash_tfm = crypto_alloc_hash(opts, 0, CRYPTO_ALG_ASYNC);
+        if (IS_ERR(hash_tfm)) {
                 ti->error = "Error initializing ESSIV hash";
-                return -EINVAL;
-        }
-
-        if (crypto_tfm_alg_type(hash_tfm) != CRYPTO_ALG_TYPE_DIGEST) {
-                ti->error = "Expected digest algorithm for ESSIV hash";
-                crypto_free_tfm(hash_tfm);
-                return -EINVAL;
+                return PTR_ERR(hash_tfm);
         }
 
-        saltsize = crypto_tfm_alg_digestsize(hash_tfm);
+        saltsize = crypto_hash_digestsize(hash_tfm);
         salt = kmalloc(saltsize, GFP_KERNEL);
         if (salt == NULL) {
                 ti->error = "Error kmallocing salt storage in ESSIV";
-                crypto_free_tfm(hash_tfm);
+                crypto_free_hash(hash_tfm);
                 return -ENOMEM;
         }
 
         sg_set_buf(&sg, cc->key, cc->key_size);
-        crypto_digest_digest(hash_tfm, &sg, 1, salt);
-        crypto_free_tfm(hash_tfm);
+        desc.tfm = hash_tfm;
+        desc.flags = CRYPTO_TFM_REQ_MAY_SLEEP;
+        err = crypto_hash_digest(&desc, &sg, cc->key_size, salt);
+        crypto_free_hash(hash_tfm);
+
+        if (err) {
+                ti->error = "Error calculating hash in ESSIV";
+                return err;
+        }
 
         /* Setup the essiv_tfm with the given salt */
         essiv_tfm = crypto_alloc_cipher(cc->cipher, 0, CRYPTO_ALG_ASYNC);