crypto: arm/ghash-ce - add missing async import/export

Since commit 8996eafdcbad ("crypto: ahash - ensure statesize is non-zero"),
all ahash drivers are required to implement import()/export(), and must have
a non-zero statesize. Fix this for the ARM Crypto Extensions GHASH
implementation.

Fixes: 8996eafdcbad ("crypto: ahash - ensure statesize is non-zero")
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 24 insertions, 0 deletions

diff --git a/arch/arm/crypto/ghash-ce-glue.c b/arch/arm/crypto/ghash-ce-glue.c
index 1568cb5cd870..b88364aa149a 100644
--- a/arch/arm/crypto/ghash-ce-glue.c
+++ b/arch/arm/crypto/ghash-ce-glue.c
@@ -220,6 +220,27 @@ static int ghash_async_digest(struct ahash_request *req)
         }
 }
 
+static int ghash_async_import(struct ahash_request *req, const void *in)
+{
+        struct ahash_request *cryptd_req = ahash_request_ctx(req);
+        struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
+        struct ghash_async_ctx *ctx = crypto_ahash_ctx(tfm);
+        struct shash_desc *desc = cryptd_shash_desc(cryptd_req);
+
+        desc->tfm = cryptd_ahash_child(ctx->cryptd_tfm);
+        desc->flags = req->base.flags;
+
+        return crypto_shash_import(desc, in);
+}
+
+static int ghash_async_export(struct ahash_request *req, void *out)
+{
+        struct ahash_request *cryptd_req = ahash_request_ctx(req);
+        struct shash_desc *desc = cryptd_shash_desc(cryptd_req);
+
+        return crypto_shash_export(desc, out);
+}
+
 static int ghash_async_setkey(struct crypto_ahash *tfm, const u8 *key,
                               unsigned int keylen)
 {
@@ -268,7 +289,10 @@ static struct ahash_alg ghash_async_alg = {
         .final                  = ghash_async_final,
         .setkey                 = ghash_async_setkey,
         .digest                 = ghash_async_digest,
+        .import                 = ghash_async_import,
+        .export                 = ghash_async_export,
         .halg.digestsize        = GHASH_DIGEST_SIZE,
+        .halg.statesize         = sizeof(struct ghash_desc_ctx),
         .halg.base              = {
                 .cra_name       = "ghash",
                 .cra_driver_name = "ghash-ce",