| From | Luis Henriques <> | Subject | [PATCH 3.16.y-ckt 047/129] crypto: skcipher - Add crypto_skcipher_has_setkey | Date | Fri, 26 Feb 2016 10:20:18 +0000 |
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3.16.7-ckt25 -stable review patch. If anyone has any objections, please let me know.
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From: Herbert Xu <herbert@gondor.apana.org.au>
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@gondor.apana.org.au> [bwh: Backported to 3.2: add to ablkcipher API instead] Signed-off-by: Ben Hutchings <ben@decadent.org.uk> Signed-off-by: Luis Henriques <luis.henriques@canonical.com> --- 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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