From: Herbert Xu Date: Fri, 22 Jan 2016 15:21:10 +0000 (+0800) Subject: crypto: skcipher - Add helper to zero stack request X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=1aaa753d918c48c603195a468766e6a2b32b87f9;p=openwrt%2Fstaging%2Fblogic.git crypto: skcipher - Add helper to zero stack request 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 --- diff --git a/include/crypto/skcipher.h b/include/crypto/skcipher.h index 2f07b4fce3e0..f7a03a17bc1d 100644 --- a/include/crypto/skcipher.h +++ b/include/crypto/skcipher.h @@ -445,6 +445,13 @@ 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