[PATCH] crypto: skcipher - Add helper to zero stack request
From: Herbert Xu <herbert@gondor.apana.org.au>
Date: 2016-01-22 15:21:12
Subsystem:
crypto api, the rest · Maintainers:
Herbert Xu, "David S. Miller", Linus Torvalds
As the size of an skcipher_request is variable, it's awkward to zero it explicitly. This patch adds a helper to do that which should be used when it is created on the stack. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/include/crypto/skcipher.h b/include/crypto/skcipher.h
index 2f07b4f..905490c 100644
--- a/include/crypto/skcipher.h
+++ b/include/crypto/skcipher.h@@ -445,6 +451,13 @@ static inline void skcipher_request_free(struct skcipher_request *req) kzfree(req); } +static inline void skcipher_request_zero(struct skcipher_request *req) +{ + struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); + + memzero_explicit(req, sizeof(*req) + crypto_skcipher_reqsize(tfm)); +} + /** * skcipher_request_set_callback() - set asynchronous callback function * @req: request handle
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Email: Herbert Xu <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt