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[CRYPTO] api: Sanitise mask when allocating ablkcipher/hash 

When allocating ablkcipher/hash objects, we use a mask that's wider than
the usual type mask.  This patch sanitises the mask supplied by the user
so we don't end up using a narrower mask which may lead to unintended
results.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu 2007-12-01 21:47:07 +11:00
parent 5e553110f2
commit 551a09a7a9
1 changed files with 4 additions and 0 deletions
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4
include/linux/crypto.h
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@ -532,6 +532,7 @@ static inline struct crypto_ablkcipher *crypto_alloc_ablkcipher(
const char *alg_name, u32 type, u32 mask)
{
type &= ~CRYPTO_ALG_TYPE_MASK;
mask &= ~CRYPTO_ALG_TYPE_MASK;
type |= CRYPTO_ALG_TYPE_BLKCIPHER;
mask |= CRYPTO_ALG_TYPE_BLKCIPHER_MASK;
@ -554,6 +555,7 @@ static inline int crypto_has_ablkcipher(const char *alg_name, u32 type,
u32 mask)
{
type &= ~CRYPTO_ALG_TYPE_MASK;
mask &= ~CRYPTO_ALG_TYPE_MASK;
type |= CRYPTO_ALG_TYPE_BLKCIPHER;
mask |= CRYPTO_ALG_TYPE_BLKCIPHER_MASK;
@ -1086,6 +1088,7 @@ static inline struct crypto_hash *crypto_alloc_hash(const char *alg_name,
u32 type, u32 mask)
{
type &= ~CRYPTO_ALG_TYPE_MASK;
mask &= ~CRYPTO_ALG_TYPE_MASK;
type |= CRYPTO_ALG_TYPE_HASH;
mask |= CRYPTO_ALG_TYPE_HASH_MASK;
@ -1105,6 +1108,7 @@ static inline void crypto_free_hash(struct crypto_hash *tfm)
static inline int crypto_has_hash(const char *alg_name, u32 type, u32 mask)
{
type &= ~CRYPTO_ALG_TYPE_MASK;
mask &= ~CRYPTO_ALG_TYPE_MASK;
type |= CRYPTO_ALG_TYPE_HASH;
mask |= CRYPTO_ALG_TYPE_HASH_MASK;