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Diffstat (limited to 'crypto')
-rw-r--r--crypto/hmac.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/crypto/hmac.c b/crypto/hmac.c
index 3610ff0b6739..09a7872b4060 100644
--- a/crypto/hmac.c
+++ b/crypto/hmac.c
@@ -160,6 +160,20 @@ static int hmac_init_tfm(struct crypto_shash *parent)
return 0;
}
+static int hmac_clone_tfm(struct crypto_shash *dst, struct crypto_shash *src)
+{
+ struct hmac_ctx *sctx = hmac_ctx(src);
+ struct hmac_ctx *dctx = hmac_ctx(dst);
+ struct crypto_shash *hash;
+
+ hash = crypto_clone_shash(sctx->hash);
+ if (IS_ERR(hash))
+ return PTR_ERR(hash);
+
+ dctx->hash = hash;
+ return 0;
+}
+
static void hmac_exit_tfm(struct crypto_shash *parent)
{
struct hmac_ctx *ctx = hmac_ctx(parent);
@@ -227,6 +241,7 @@ static int hmac_create(struct crypto_template *tmpl, struct rtattr **tb)
inst->alg.import = hmac_import;
inst->alg.setkey = hmac_setkey;
inst->alg.init_tfm = hmac_init_tfm;
+ inst->alg.clone_tfm = hmac_clone_tfm;
inst->alg.exit_tfm = hmac_exit_tfm;
inst->free = shash_free_singlespawn_instance;