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| author | Herbert Xu <herbert@gondor.apana.org.au> | 2016-01-11 21:26:50 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-02-17 12:31:03 -0800 |
| commit | 7f5c995746ebc3f431c596ffabb98af1b3e3de86 (patch) | |
| tree | 0c1c697af9221bb58091832af67787a096d356e4 | |
| parent | 017db8bc9a1d62710af99b0eec605ee1f0285277 (diff) | |
| download | lwn-7f5c995746ebc3f431c596ffabb98af1b3e3de86.tar.gz lwn-7f5c995746ebc3f431c596ffabb98af1b3e3de86.zip | |
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 <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | crypto/skcipher.c | 2 | ||||
| -rw-r--r-- | include/crypto/skcipher.h | 7 |
2 files changed, 9 insertions, 0 deletions
diff --git a/crypto/skcipher.c b/crypto/skcipher.c index 7591928be7ca..d199c0b1751c 100644 --- a/crypto/skcipher.c +++ b/crypto/skcipher.c @@ -118,6 +118,7 @@ static int crypto_init_skcipher_ops_blkcipher(struct crypto_tfm *tfm) skcipher->decrypt = skcipher_decrypt_blkcipher; skcipher->ivsize = crypto_blkcipher_ivsize(blkcipher); + skcipher->has_setkey = calg->cra_blkcipher.max_keysize; return 0; } @@ -210,6 +211,7 @@ static int crypto_init_skcipher_ops_ablkcipher(struct crypto_tfm *tfm) skcipher->ivsize = crypto_ablkcipher_ivsize(ablkcipher); skcipher->reqsize = crypto_ablkcipher_reqsize(ablkcipher) + sizeof(struct ablkcipher_request); + skcipher->has_setkey = calg->cra_ablkcipher.max_keysize; return 0; } diff --git a/include/crypto/skcipher.h b/include/crypto/skcipher.h index d8dd41fb034f..fd8742a40ff3 100644 --- a/include/crypto/skcipher.h +++ b/include/crypto/skcipher.h @@ -61,6 +61,8 @@ struct crypto_skcipher { unsigned int ivsize; unsigned int reqsize; + bool has_setkey; + struct crypto_tfm base; }; @@ -305,6 +307,11 @@ static inline int crypto_skcipher_setkey(struct crypto_skcipher *tfm, return tfm->setkey(tfm, key, keylen); } +static inline bool crypto_skcipher_has_setkey(struct crypto_skcipher *tfm) +{ + return tfm->has_setkey; +} + /** * crypto_skcipher_reqtfm() - obtain cipher handle from request * @req: skcipher_request out of which the cipher handle is to be obtained |