crypto: cryptd - Add finup/export/import for hash
Herbert Xu [Wed, 22 Jul 2009 03:10:22 +0000 (11:10 +0800)]
This patch adds the finup/export/import functions to the cryptd
ahash implementation.  We simply invoke the underlying shash
operations.

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

crypto/cryptd.c

index fbd26f9..2eb7058 100644 (file)
@@ -478,6 +478,29 @@ static int cryptd_hash_final_enqueue(struct ahash_request *req)
        return cryptd_hash_enqueue(req, cryptd_hash_final);
 }
 
+static void cryptd_hash_finup(struct crypto_async_request *req_async, int err)
+{
+       struct ahash_request *req = ahash_request_cast(req_async);
+       struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
+
+       if (unlikely(err == -EINPROGRESS))
+               goto out;
+
+       err = shash_ahash_finup(req, &rctx->desc);
+
+       req->base.complete = rctx->complete;
+
+out:
+       local_bh_disable();
+       rctx->complete(&req->base, err);
+       local_bh_enable();
+}
+
+static int cryptd_hash_finup_enqueue(struct ahash_request *req)
+{
+       return cryptd_hash_enqueue(req, cryptd_hash_finup);
+}
+
 static void cryptd_hash_digest(struct crypto_async_request *req_async, int err)
 {
        struct cryptd_hash_ctx *ctx = crypto_tfm_ctx(req_async->tfm);
@@ -507,6 +530,20 @@ static int cryptd_hash_digest_enqueue(struct ahash_request *req)
        return cryptd_hash_enqueue(req, cryptd_hash_digest);
 }
 
+static int cryptd_hash_export(struct ahash_request *req, void *out)
+{
+       struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
+
+       return crypto_shash_export(&rctx->desc, out);
+}
+
+static int cryptd_hash_import(struct ahash_request *req, const void *in)
+{
+       struct cryptd_hash_request_ctx *rctx = ahash_request_ctx(req);
+
+       return crypto_shash_import(&rctx->desc, in);
+}
+
 static int cryptd_create_hash(struct crypto_template *tmpl, struct rtattr **tb,
                              struct cryptd_queue *queue)
 {
@@ -546,6 +583,9 @@ static int cryptd_create_hash(struct crypto_template *tmpl, struct rtattr **tb,
        inst->alg.init   = cryptd_hash_init_enqueue;
        inst->alg.update = cryptd_hash_update_enqueue;
        inst->alg.final  = cryptd_hash_final_enqueue;
+       inst->alg.finup  = cryptd_hash_finup_enqueue;
+       inst->alg.export = cryptd_hash_export;
+       inst->alg.import = cryptd_hash_import;
        inst->alg.setkey = cryptd_hash_setkey;
        inst->alg.digest = cryptd_hash_digest_enqueue;