4.4-stable review patch. If anyone has any objections, please let me know.
------------------
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: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
crypto/ahash.c | 5 ++++-
crypto/shash.c | 4 +++-
include/crypto/hash.h | 6 ++++++
3 files changed, 13 insertions(+), 2 deletions(-)
--- a/crypto/ahash.c
+++ b/crypto/ahash.c
@@ -451,6 +451,7 @@ static int crypto_ahash_init_tfm(struct
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;
@@ -463,8 +464,10 @@ static int crypto_ahash_init_tfm(struct
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)
--- a/crypto/shash.c
+++ b/crypto/shash.c
@@ -355,8 +355,10 @@ int crypto_init_shash_ops_async(struct c
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)
--- a/include/crypto/hash.h
+++ b/include/crypto/hash.h
@@ -204,6 +204,7 @@ struct crypto_ahash {
unsigned int keylen);
unsigned int reqsize;
+ bool has_setkey;
struct crypto_tfm base;
};
@@ -375,6 +376,11 @@ static inline void *ahash_request_ctx(st
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;
+}
+
/**
* crypto_ahash_finup() - update and finalize message digest
* @req: reference to the ahash_request handle that holds all information
--
To unsubscribe from this list: send the line "unsubscribe stable" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html