From 332f8840f7095d294f9bb066b175a100bcde214c Mon Sep 17 00:00:00 2001 From: Herbert Xu Date: Thu, 15 Nov 2007 22:36:07 +0800 Subject: [CRYPTO] ablkcipher: Add distinct ABLKCIPHER type Up until now we have ablkcipher algorithms have been identified as type BLKCIPHER with the ASYNC bit set. This is suboptimal because ablkcipher refers to two things. On the one hand it refers to the top-level ablkcipher interface with requests. On the other hand it refers to and algorithm type underneath. As it is you cannot request a synchronous block cipher algorithm with the ablkcipher interface on top. This is a problem because we want to be able to eventually phase out the blkcipher top-level interface. This patch fixes this by making ABLKCIPHER its own type, just as we have distinct types for HASH and DIGEST. The type it associated with the algorithm implementation only. Which top-level interface is used for synchronous block ciphers is then determined by the mask that's used. If it's a specific mask then the old blkcipher interface is given, otherwise we go with the new ablkcipher interface. Signed-off-by: Herbert Xu --- crypto/authenc.c | 2 +- crypto/blkcipher.c | 9 +++------ crypto/cryptd.c | 4 ++-- 3 files changed, 6 insertions(+), 9 deletions(-) (limited to 'crypto') diff --git a/crypto/authenc.c b/crypto/authenc.c index 126a529b496..bc4e608ca84 100644 --- a/crypto/authenc.c +++ b/crypto/authenc.c @@ -292,7 +292,7 @@ static struct crypto_instance *crypto_authenc_alloc(struct rtattr **tb) goto out_put_auth; enc = crypto_attr_alg(tb[3], CRYPTO_ALG_TYPE_BLKCIPHER, - CRYPTO_ALG_TYPE_MASK); + CRYPTO_ALG_TYPE_BLKCIPHER_MASK); inst = ERR_PTR(PTR_ERR(enc)); if (IS_ERR(enc)) goto out_put_auth; diff --git a/crypto/blkcipher.c b/crypto/blkcipher.c index f6c67f9d4e5..180d9145147 100644 --- a/crypto/blkcipher.c +++ b/crypto/blkcipher.c @@ -433,9 +433,8 @@ static unsigned int crypto_blkcipher_ctxsize(struct crypto_alg *alg, u32 type, struct blkcipher_alg *cipher = &alg->cra_blkcipher; unsigned int len = alg->cra_ctxsize; - type ^= CRYPTO_ALG_ASYNC; - mask &= CRYPTO_ALG_ASYNC; - if ((type & mask) && cipher->ivsize) { + if ((mask & CRYPTO_ALG_TYPE_MASK) == CRYPTO_ALG_TYPE_MASK && + cipher->ivsize) { len = ALIGN(len, (unsigned long)alg->cra_alignmask + 1); len += cipher->ivsize; } @@ -482,9 +481,7 @@ static int crypto_init_blkcipher_ops(struct crypto_tfm *tfm, u32 type, u32 mask) if (alg->ivsize > PAGE_SIZE / 8) return -EINVAL; - type ^= CRYPTO_ALG_ASYNC; - mask &= CRYPTO_ALG_ASYNC; - if (type & mask) + if ((mask & CRYPTO_ALG_TYPE_MASK) == CRYPTO_ALG_TYPE_MASK) return crypto_init_blkcipher_ops_sync(tfm); else return crypto_init_blkcipher_ops_async(tfm); diff --git a/crypto/cryptd.c b/crypto/cryptd.c index 8bf2da835f7..1a5c45b9685 100644 --- a/crypto/cryptd.c +++ b/crypto/cryptd.c @@ -228,7 +228,7 @@ static struct crypto_instance *cryptd_alloc_blkcipher( struct crypto_alg *alg; alg = crypto_get_attr_alg(tb, CRYPTO_ALG_TYPE_BLKCIPHER, - CRYPTO_ALG_TYPE_MASK | CRYPTO_ALG_ASYNC); + CRYPTO_ALG_TYPE_MASK); if (IS_ERR(alg)) return ERR_PTR(PTR_ERR(alg)); @@ -236,7 +236,7 @@ static struct crypto_instance *cryptd_alloc_blkcipher( if (IS_ERR(inst)) goto out_put_alg; - inst->alg.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER | CRYPTO_ALG_ASYNC; + inst->alg.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC; inst->alg.cra_type = &crypto_ablkcipher_type; inst->alg.cra_ablkcipher.ivsize = alg->cra_blkcipher.ivsize; -- cgit v1.2.3-70-g09d2