From: "David Woodhouse" Subject: Re: [PATCH v3 7/7] crypto: AF_ALG - add support for key_id Date: Wed, 30 Mar 2016 16:45:56 -0000 Message-ID: <03fdd2c83ad143936f2df2b9c75b039e.squirrel@twosheds.infradead.org> References: <20160330005734.25410.28829.stgit@tstruk-mobl1> <20160330005649.25410.70508.stgit@tstruk-mobl1> <14284.1459355506@warthog.procyon.org.uk> Mime-Version: 1.0 Content-Type: text/plain;charset=utf-8 Content-Transfer-Encoding: 8bit Cc: "Tadeusz Struk" , dhowells@redhat.com, herbert@gondor.apana.org.au, smueller@chronox.de, linux-api@vger.kernel.org, marcel@holtmann.org, linux-kernel@vger.kernel.org, keyrings@vger.kernel.org, linux-crypto@vger.kernel.org, dwmw2@infradead.org, davem@davemloft.net To: "David Howells" Return-path: In-Reply-To: <14284.1459355506@warthog.procyon.org.uk> Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-crypto.vger.kernel.org > Tadeusz Struk wrote: > >> + keyring = request_key(&key_type_asymmetric, key_name, NULL); >> + >> + err = -ENOKEY; >> + if (IS_ERR(keyring)) >> + goto out; >> + >> + pkey = keyring->payload.data[asym_crypto]; > > NAK. This is liable to crash in future. You may not assume that you know > what keyring->payload.data[asym_crypto] points to. > > You may not use struct public_key outside of crypto/asymmetric_key/. It's > the > internal data of the software subtype. I'll move it out of the global > header > to remove the temptation;-). > > You must use accessor functions such as verify_signature(). Feel free to > add > further accessor functions such as query_asym_capabilities(), > create_signature(), encrypt_blob() and decrypt_blob() or something like > that. Grr. This is not the first time this has been pointed out. And it shouldn't have *needed* to be pointed out in the first place. Please do not ignore review feedback. Or common sense. -- dwmw2