3.16.7-ckt25 -stable review patch. If anyone has any objections, please let me know.
---8<------------------------------------------------------------
From: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
commit a1383cd86a062fc798899ab20f0ec2116cce39cb upstream.
This patch adds a way for skcipher users to determine whether a key
is required by a transform.
Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
[bwh: Backported to 3.2: add to ablkcipher API instead]
Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
Signed-off-by: Luis Henriques <luis.henriques@xxxxxxxxxxxxx>
---
crypto/ablkcipher.c | 1 +
include/linux/crypto.h | 8 ++++++++
2 files changed, 9 insertions(+)
diff --git a/crypto/ablkcipher.c b/crypto/ablkcipher.c
index f02fdbefb2c6..5da16526c890 100644
--- a/crypto/ablkcipher.c
+++ b/crypto/ablkcipher.c
@@ -375,6 +375,7 @@ static int crypto_init_ablkcipher_ops(struct crypto_tfm *tfm, u32 type,
}
crt->base = __crypto_ablkcipher_cast(tfm);
crt->ivsize = alg->ivsize;
+ crt->has_setkey = alg->max_keysize;
return 0;
}
diff --git a/include/linux/crypto.h b/include/linux/crypto.h
index 2b00d92a6e6f..61dd0b15d21c 100644
--- a/include/linux/crypto.h
+++ b/include/linux/crypto.h
@@ -354,6 +354,7 @@ struct ablkcipher_tfm {
unsigned int ivsize;
unsigned int reqsize;
+ bool has_setkey;
};
struct aead_tfm {
@@ -664,6 +665,13 @@ static inline int crypto_ablkcipher_setkey(struct crypto_ablkcipher *tfm,
return crt->setkey(crt->base, key, keylen);
}
+static inline bool crypto_ablkcipher_has_setkey(struct crypto_ablkcipher *tfm)
+{
+ struct ablkcipher_tfm *crt = crypto_ablkcipher_crt(tfm);
+
+ return crt->has_setkey;
+}
+
static inline struct crypto_ablkcipher *crypto_ablkcipher_reqtfm(
struct ablkcipher_request *req)
{
--
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