linux-kernel - Re: [PATCH 2/2] crypto: remove padding logic from rsa.c

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Message-ID: <6299.1456498920@warthog.procyon.org.uk>
Date:	Fri, 26 Feb 2016 15:02:00 +0000
From:	David Howells <dhowells@...hat.com>
To:	Tadeusz Struk <tadeusz.struk@...el.com>
Cc:	dhowells@...hat.com, linux-kernel@...r.kernel.org,
	balrogg@...glemail.com, linux-security-module@...r.kernel.org,
	keyrings@...r.kernel.org, linux-crypto@...r.kernel.org,
	zohar@...ux.vnet.ibm.com
Subject: Re: [PATCH 2/2] crypto: remove padding logic from rsa.c

Tadeusz Struk <tadeusz.struk@...el.com> wrote:

> +		if (memcmp(sig->digest, output, sig->digest_size) ||
> +		    req->dst_len != sig->digest_size)

You must always do the size check first!

David