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crypto: algif - zeroize message digest buffer

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Zeroize the buffer holding the message digest calculated for the
consumer before the buffer is released by the hash AF_ALG interface
handler.

Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Stephan Mueller 2014-11-11 05:37:07 +01:00 committed by Herbert Xu
parent 4c7912e919
commit 2a6af25bef
1 changed files with 2 additions and 0 deletions
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2
crypto/algif_hash.c
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@ -258,6 +258,8 @@ static void hash_sock_destruct(struct sock *sk)
struct alg_sock *ask = alg_sk(sk); struct alg_sock *ask = alg_sk(sk);
struct hash_ctx *ctx = ask->private; struct hash_ctx *ctx = ask->private;
memzero_explicit(ctx->result,
crypto_ahash_digestsize(crypto_ahash_reqtfm(&ctx->req)));
sock_kfree_s(sk, ctx->result, sock_kfree_s(sk, ctx->result,
crypto_ahash_digestsize(crypto_ahash_reqtfm(&ctx->req))); crypto_ahash_digestsize(crypto_ahash_reqtfm(&ctx->req)));
sock_kfree_s(sk, ctx, ctx->len); sock_kfree_s(sk, ctx, ctx->len);