From: Herbert Xu Date: Mon, 11 Jan 2016 13:26:50 +0000 (+0800) Subject: crypto: skcipher - Add crypto_skcipher_has_setkey X-Git-Tag: v3.16.35~462 X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=05b93b57b60b3461726019eeba7a45500b889573;p=thirdparty%2Fkernel%2Fstable.git crypto: skcipher - Add crypto_skcipher_has_setkey 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 [bwh: Backported to 3.2: add to ablkcipher API instead] Signed-off-by: Ben Hutchings Signed-off-by: Luis Henriques --- diff --git a/crypto/ablkcipher.c b/crypto/ablkcipher.c index f02fdbefb2c6f..5da16526c8906 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 2b00d92a6e6fc..61dd0b15d21ca 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) {