[PATCH 3.13.y-ckt 094/136] crypto: hash - Add crypto_ahash_has_setkey

From: Kamal Mostafa
Date: Tue Feb 02 2016 - 13:39:59 EST


3.13.11-ckt34 -stable review patch. If anyone has any objections, please let me know.

---8<------------------------------------------------------------

From: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>

commit a5596d6332787fd383b3b5427b41f94254430827 upstream.

This patch adds a way for ahash users to determine whether a key
is required by a crypto_ahash transform.

Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Kamal Mostafa <kamal@xxxxxxxxxxxxx>
---
crypto/ahash.c | 5 ++++-
crypto/shash.c | 4 +++-
include/crypto/hash.h | 7 +++++++
3 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/crypto/ahash.c b/crypto/ahash.c
index 857ae2b..b246858 100644
--- a/crypto/ahash.c
+++ b/crypto/ahash.c
@@ -369,6 +369,7 @@ static int crypto_ahash_init_tfm(struct crypto_tfm *tfm)
struct ahash_alg *alg = crypto_ahash_alg(hash);

hash->setkey = ahash_nosetkey;
+ hash->has_setkey = false;
hash->export = ahash_no_export;
hash->import = ahash_no_import;

@@ -381,8 +382,10 @@ static int crypto_ahash_init_tfm(struct crypto_tfm *tfm)
hash->finup = alg->finup ?: ahash_def_finup;
hash->digest = alg->digest;

- if (alg->setkey)
+ if (alg->setkey) {
hash->setkey = alg->setkey;
+ hash->has_setkey = true;
+ }
if (alg->export)
hash->export = alg->export;
if (alg->import)
diff --git a/crypto/shash.c b/crypto/shash.c
index 929058a..8e4256a 100644
--- a/crypto/shash.c
+++ b/crypto/shash.c
@@ -354,8 +354,10 @@ int crypto_init_shash_ops_async(struct crypto_tfm *tfm)
crt->finup = shash_async_finup;
crt->digest = shash_async_digest;

- if (alg->setkey)
+ if (alg->setkey) {
crt->setkey = shash_async_setkey;
+ crt->has_setkey = true;
+ }
if (alg->export)
crt->export = shash_async_export;
if (alg->import)
diff --git a/include/crypto/hash.h b/include/crypto/hash.h
index 26cb1eb..4bdd795 100644
--- a/include/crypto/hash.h
+++ b/include/crypto/hash.h
@@ -94,6 +94,7 @@ struct crypto_ahash {
unsigned int keylen);

unsigned int reqsize;
+ bool has_setkey;
struct crypto_tfm base;
};

@@ -181,6 +182,12 @@ static inline void *ahash_request_ctx(struct ahash_request *req)

int crypto_ahash_setkey(struct crypto_ahash *tfm, const u8 *key,
unsigned int keylen);
+
+static inline bool crypto_ahash_has_setkey(struct crypto_ahash *tfm)
+{
+ return tfm->has_setkey;
+}
+
int crypto_ahash_finup(struct ahash_request *req);
int crypto_ahash_final(struct ahash_request *req);
int crypto_ahash_digest(struct ahash_request *req);
--
1.9.1