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| author | Herbert Xu <herbert@gondor.apana.org.au> | 2016-01-22 18:17:58 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2016-01-25 17:42:11 +0300 |
| commit | e67ffe0af4d450e95e5f9bb7d081500e30777857 (patch) | |
| tree | 98409c608f62e24177d8ee1b92c76d3861fbf5dc /include | |
| parent | b3614763059b82c26bdd02ffcb1c016c1132aad0 (diff) | |
| download | linux-e67ffe0af4d450e95e5f9bb7d081500e30777857.tar.xz | |
crypto: hash - Add helpers to zero stack request/descriptor
As the size of an ahash_request or shash_desc is variable, it's
awkward to zero them explicitly. This patch adds helpers to do
that which should be used when they are created on the stack.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'include')
| -rw-r--r-- | include/crypto/hash.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/include/crypto/hash.h b/include/crypto/hash.h index 6361892ea737..aef819247fe8 100644 --- a/include/crypto/hash.h +++ b/include/crypto/hash.h @@ -14,6 +14,7 @@ #define _CRYPTO_HASH_H #include <linux/crypto.h> +#include <linux/string.h> struct crypto_ahash; @@ -550,6 +551,12 @@ static inline void ahash_request_free(struct ahash_request *req) kzfree(req); } +static inline void ahash_request_zero(struct ahash_request *req) +{ + memzero_explicit(req, sizeof(*req) + + crypto_ahash_reqsize(crypto_ahash_reqtfm(req))); +} + static inline struct ahash_request *ahash_request_cast( struct crypto_async_request *req) { @@ -872,4 +879,10 @@ int crypto_shash_final(struct shash_desc *desc, u8 *out); int crypto_shash_finup(struct shash_desc *desc, const u8 *data, unsigned int len, u8 *out); +static inline void shash_desc_zero(struct shash_desc *desc) +{ + memzero_explicit(desc, + sizeof(*desc) + crypto_shash_descsize(desc->tfm)); +} + #endif /* _CRYPTO_HASH_H */ |