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

commit ed4767d612fd2c39e2c4c69eba484c1219dcddb6 upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/arch/arm/crypto/ghash-ce-glue.c b/arch/arm/crypto/ghash-ce-glue.c
index 03a39fe..9d9ba9a 100644 (file)
--- a/arch/arm/crypto/ghash-ce-glue.c
+++ b/arch/arm/crypto/ghash-ce-glue.c
@@ -226,6 +226,27 @@ 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)
 {
@@ -274,7 +295,10 @@ 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",