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| author | Herbert Xu <herbert@gondor.apana.org.au> | 2016-01-21 17:10:56 +0800 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2016-01-25 22:42:11 +0800 |
| commit | 973fb3fb50e3959d90179d09ed3ce454dd7bc6e4 (patch) | |
| tree | 9233f42856ad51fb3c92703aa7d2541b8fd3a864 | |
| parent | 7768fb2ee9e907bfa91d13cb698fa68880ddc80a (diff) | |
| download | linux-973fb3fb50e3959d90179d09ed3ce454dd7bc6e4.tar.gz linux-973fb3fb50e3959d90179d09ed3ce454dd7bc6e4.tar.bz2 linux-973fb3fb50e3959d90179d09ed3ce454dd7bc6e4.zip | |
crypto: skcipher - Add default key size helper
While converting ecryptfs over to skcipher I found that it needs
to pick a default key size if one isn't given. Rather than having
it poke into the guts of the algorithm to get max_keysize, let's
provide a helper that is meant to give a sane default (just in
case we ever get an algorithm that has no maximum key size).
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| -rw-r--r-- | crypto/skcipher.c | 4 | ||||
| -rw-r--r-- | include/crypto/skcipher.h | 11 |
2 files changed, 10 insertions, 5 deletions
diff --git a/crypto/skcipher.c b/crypto/skcipher.c index d199c0b1751c..69230e9d4ac9 100644 --- a/crypto/skcipher.c +++ b/crypto/skcipher.c @@ -118,7 +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; + skcipher->keysize = calg->cra_blkcipher.max_keysize; return 0; } @@ -211,7 +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; + skcipher->keysize = calg->cra_ablkcipher.max_keysize; return 0; } diff --git a/include/crypto/skcipher.h b/include/crypto/skcipher.h index fd8742a40ff3..2f07b4fce3e0 100644 --- a/include/crypto/skcipher.h +++ b/include/crypto/skcipher.h @@ -60,8 +60,7 @@ struct crypto_skcipher { unsigned int ivsize; unsigned int reqsize; - - bool has_setkey; + unsigned int keysize; struct crypto_tfm base; }; @@ -309,7 +308,13 @@ static inline int crypto_skcipher_setkey(struct crypto_skcipher *tfm, static inline bool crypto_skcipher_has_setkey(struct crypto_skcipher *tfm) { - return tfm->has_setkey; + return tfm->keysize; +} + +static inline unsigned int crypto_skcipher_default_keysize( + struct crypto_skcipher *tfm) +{ + return tfm->keysize; } /** |