1 files changed, 37 insertions, 1 deletions

diff --git a/crypto/ahash.c b/crypto/ahash.c
index 27128f2c687a..ba5292d69ebd 100644
--- a/crypto/ahash.c
+++ b/crypto/ahash.c
@@ -112,6 +112,22 @@ int crypto_hash_walk_first(struct ahash_request *req,
 }
 EXPORT_SYMBOL_GPL(crypto_hash_walk_first);
 
+int crypto_hash_walk_first_compat(struct hash_desc *hdesc,
+                                  struct crypto_hash_walk *walk,
+                                  struct scatterlist *sg, unsigned int len)
+{
+        walk->total = len;
+
+        if (!walk->total)
+                return 0;
+
+        walk->alignmask = crypto_hash_alignmask(hdesc->tfm);
+        walk->sg = sg;
+        walk->flags = hdesc->flags;
+
+        return hash_walk_new_entry(walk);
+}
+
 static int ahash_setkey_unaligned(struct crypto_ahash *tfm, const u8 *key,
                                 unsigned int keylen)
 {
@@ -146,6 +162,26 @@ static int ahash_setkey(struct crypto_ahash *tfm, const u8 *key,
         return ahash->setkey(tfm, key, keylen);
 }
 
+static int ahash_nosetkey(struct crypto_ahash *tfm, const u8 *key,
+                          unsigned int keylen)
+{
+        return -ENOSYS;
+}
+
+int crypto_ahash_import(struct ahash_request *req, const u8 *in)
+{
+        struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
+        struct ahash_alg *alg = crypto_ahash_alg(tfm);
+
+        memcpy(ahash_request_ctx(req), in, crypto_ahash_reqsize(tfm));
+
+        if (alg->reinit)
+                alg->reinit(req);
+
+        return 0;
+}
+EXPORT_SYMBOL_GPL(crypto_ahash_import);
+
 static unsigned int crypto_ahash_ctxsize(struct crypto_alg *alg, u32 type,
                                         u32 mask)
 {
@@ -164,7 +200,7 @@ static int crypto_init_ahash_ops(struct crypto_tfm *tfm, u32 type, u32 mask)
         crt->update = alg->update;
         crt->final  = alg->final;
         crt->digest = alg->digest;
-        crt->setkey = ahash_setkey;
+        crt->setkey = alg->setkey ? ahash_setkey : ahash_nosetkey;
         crt->digestsize = alg->digestsize;
 
         return 0;